US20120110956A1 - Method and chamber machine for sealing packaging material - Google Patents
Method and chamber machine for sealing packaging material Download PDFInfo
- Publication number
- US20120110956A1 US20120110956A1 US13/271,747 US201113271747A US2012110956A1 US 20120110956 A1 US20120110956 A1 US 20120110956A1 US 201113271747 A US201113271747 A US 201113271747A US 2012110956 A1 US2012110956 A1 US 2012110956A1
- Authority
- US
- United States
- Prior art keywords
- sealing
- temperature
- packaging material
- chamber
- sealing bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91441—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time
- B29C66/91443—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile
- B29C66/91445—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being non-constant over time following a temperature-time profile by steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/03—After-treatments in the joint area
- B29C66/034—Thermal after-treatments
- B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/349—Cooling the welding zone on the welding spot
- B29C66/3494—Cooling the welding zone on the welding spot while keeping the welding zone under pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/431—Joining the articles to themselves
- B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
- B29C66/43121—Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7373—Joining soiled or oxidised materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
- B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
- B29C66/81421—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
- B29C66/81422—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being convex
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/849—Packaging machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
- B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
- B29C66/91951—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to time, e.g. temperature-time diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/924—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/9241—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power
- B29C66/92441—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time
- B29C66/92443—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile
- B29C66/92445—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force, the mechanical power or the displacement of the joining tools by controlling or regulating the pressure, the force or the mechanical power the pressure, the force or the mechanical power being non-constant over time following a pressure-time profile by steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
- B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges
- B29C66/9292—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams
- B29C66/92921—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges in explicit relation to another variable, e.g. pressure diagrams in specific relation to time, e.g. pressure-time diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
- B29C66/944—Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
- B29C66/967—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes
- B29C66/9672—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving special data inputs or special data outputs, e.g. for monitoring purposes involving special data inputs, e.g. involving barcodes, RFID tags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
- B65B31/024—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for wrappers or bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
- B65B51/146—Closing bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
- B29C66/8181—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
- B29C66/81811—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/32—Cooling, or cooling and pressing, package closures after heat-sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/24—Cleaning of, or removing dust from, containers, wrappers, or packaging ; Preventing of fouling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
- B65B9/12—Subdividing filled tubes to form two or more packages by sealing or securing involving displacement of contents
Definitions
- the disclosure relates to a method for sealing packaging material, preferably a bag, and a chamber machine or belted chamber machine for implementing the method.
- chamber machines and belted chamber machines which seal plastic bags under vacuum and/or modified atmosphere.
- the operator can specify the sealing time, sealing temperature and the time point as a function of the set negative pressure in the chamber.
- the contact pressure of the sealing bar onto a counter-pressure strip for the sealing process is present here at an adequate level and is set by a pressure reducer. Automatic means of control during the evacuation and sealing process is not provided.
- a further problem is presented by deposits, such as for example product parts of a marinade in the region of the sealing weld, which are present on the inner sides of the bag due to the product filling process.
- deposits such as for example product parts of a marinade in the region of the sealing weld, which are present on the inner sides of the bag due to the product filling process.
- this may be a herbal mixture dissolved in water.
- Small constituent parts of the herbs, which are located in the region where the sealing weld is to be produced, are enclosed within the sealing weld by both sides of the film. Despite this, they may permit a tight sealing weld and a reliably closed bag.
- the object of the present disclosure is to make a method available for sealing packaging material with which the disadvantages described above can be remedied.
- At least one sealing bar is heated to a first temperature before or while contact with the packaging material is established.
- the first temperature is lower than a sealing temperature and higher than a temperature at which liquid product parts are at least partially disintegrated or dissolved to facilitate escape of the product parts from a region in which the packaging materials are to be sealed together.
- the first temperature is maintained over a defined holding time.
- the temperature of at least one sealing bar is increased to a sealing temperature and held until sealing of the packaging material is concluded.
- the method is particularly advantageous for packaging in which a product which, for example, has been externally treated with an aqueous marinade, is enclosed by a packaging material, preferably introduced into a bag, and the packaging material or the sealable bag exhibits a particular suitability or a prescribed use by an end user.
- a packaging material preferably introduced into a bag
- the packaging material or the sealable bag exhibits a particular suitability or a prescribed use by an end user.
- the bag with the product can be subjected to a higher temperature in an oven or in boiling water and consequently the packaging material must have a very high required temperature resistance of up to, for example, 250° C.
- Plastic bags of this nature are for reasons of cost preferably made from a mono-material such as polyamide or nylon.
- the method according to the disclosure is however also suitable for all other currently available packaging materials in permitting product parts to escape from the sealing region.
- the first temperature preferably corresponds to a temperature above 40° C. and preferentially the temperature corresponds to the vaporisation temperature of water or it lies in a temperature range of 40° C. to 220° C.
- a preferred embodiment of the method provides for a first pressure, which acts relatively between the sealing bar and a counter-pressure strip or another sealing bar, being lower than a second pressure during the sealing process. In this way the application of heat by the sealing bar into the packaging material and the possibility of the escape of product parts from the sealing region are optimised.
- the packaging material can preferably be a plastic film or a plastic laminated material preferably in the form of a bag.
- the packaging material can have a temperature resistance, preferably for boiling or roasting the product, preferably in a range from 120° C. to 250° C.
- the sealing temperature is higher than 250° C. so that the sealing weld remains closed during boiling or roasting.
- normally small holes are pierced in the packaging material or in the bag, for example with a fork or knife, by the end user.
- At least one sealing bar can be heated to a pre-heating temperature before being pressed onto the counter-pressure strip or onto the other sealing bar in order to shorten the warm-up time to the first temperature.
- the process time can preferably also or additionally be brought to a cooling temperature by means of active cooling at which the sealing bar is not immediately removed from the counter-pressure strip or oppositely situated further sealing bar, but instead after the sealing weld has solidified.
- gassing may follow the evacuation process in order to produce a modified atmosphere, or steam purging may occur instead of evacuation.
- the controller regulates the temperatures of at least two sealing bars, enclosing the packaging material in order to ensure an optimised heat transfer from the sealing bars into the packaging material and to optimise the complete packaging process.
- the controller comprises an input device on which an operator can specify the values, such as temperature, pressure and their temporal progression for a process.
- the method can also be used with packaging processes to heat product parts such as sauces, meat juice and other liquids in the sealing region before the sealing process such that they change their state of aggregation and/or escape from the sealing region due to the temperature change or they can be removed due to the pressure on the film inner sides of the packaging material on the product parts.
- product parts such as sauces, meat juice and other liquids
- FIG. 1 illustrates a schematic view of a belted chamber machine
- FIG. 2 a illustrates a schematic view of the inside of a belted chamber machine with a sealing bar in an open position
- FIG. 2 b illustrates a schematic view of the inside of a belted chamber machine with a sealing bar in a closed position
- FIG. 3 a illustrates a schematic view of the inside of a belted chamber machine with two oppositely situated sealing bars in an open position
- FIG. 3 b illustrates a schematic view of the inside of a belted chamber machine with two oppositely situated sealing bars in a closed position
- FIG. 4 illustrates a time/temperature and a time/pressure graph of a method according to the disclosure
- FIG. 5 illustrates a time/temperature and a time/pressure graph in a variant
- FIG. 6 illustrates a time/temperature and a time/pressure graph in a further variant.
- FIG. 1 illustrates an embodiment of a belted chamber machine 1 with a feed belt 2 on which bags, which are not illustrated, are deposited filled with products.
- the belted chamber machine has a transport direction R, an insertion end E and an exit end A.
- a chamber upper part 3 with a machine table 4 forms a closed chamber which can be evacuated.
- a controller 14 controls the processes of the belted chamber machine 1 , displays operational information to an operating person and is used for the operating person to make entries.
- FIG. 2 a illustrates a bag 6 and a product 7 .
- the product 7 in the bag 6 is inserted into a chamber machine or several bags are fed to a belted chamber machine 1 via the feed belt 2 .
- the chamber is closed and a vacuum is produced inside the chamber in order to evacuate the bag 6 .
- a neck 8 of the bag is located between a sealing bar 9 and a counter-pressure strip 10 .
- the sealing bar 9 is located in an open position so that the inside of the bag 6 is also evacuated. Once the evacuation is terminated in that a vacuum value set by the operating person is reached, the sealing bar 9 , as illustrated in FIG.
- the heating of the sealing bar 9 is realised by means of electrical resistance heating elements, for example, sealing wire.
- the sealing bar 9 is heated to a first temperature T 1 before or during the contact with the neck 8 of the bag. Due to the heating of the product residues 11 in the region 12 of the sealing weld to a first temperature T 1 , the liquid part 11 ′ of the product parts 11 vaporises and escapes from the region 12 .
- This first temperature T 1 is lower than a sealing temperature Ts of the packaging material in order to prevent premature sealing.
- the temperature of the sealing bar 9 is raised to the sealing temperature Ts and also a sealing pressure Ps between the sealing bar 9 and the counter-pressure strip 10 is produced during a defined period.
- the contact pressure P 1 is the sealing pressure Ps right from the start.
- FIGS. 3 a respectively 3 b illustrate a variant of FIGS. 2 a respectively 2 b in which, instead of an unheated counter-pressure strip 10 , a further heatable sealing bar 13 is present.
- the heat is transferred from the sealing bars 9 and 13 , which are heated to the first temperature T 1 , from both sides onto the bag 6 .
- the time for this process or for maintaining the temperature in the sealing bars 9 and 13 at the first temperature T 1 can be set by the operating personnel and is regulated by the controller 14 .
- the increase of the temperature on the sealing bars from the first temperature T 1 to the sealing temperature Ts can be carried out before, simultaneously or after the increase in pressure from the contact pressure P 1 to the higher sealing pressure Ps.
- FIG. 4 illustrates a t/P (time/pressure) and a t/T (time/temperature) graph which relates to the embodiment of the FIGS. 2 a and 2 b , respectively 3 a and 3 b.
- the method according to the disclosure provides for a variant in which the sealing bars 9 and 13 crimp the bag 6 and a first temperature T 1 is transferred to the bag 6 by the contact with it during the (holding) time t 1 .
- the temperature T 1 is higher or equal to a product temperature Tp which must at least be attained in order to change the state of aggregation of the product parts 11 . This is preferably carried out until the product parts 11 , 11 ′ have escaped from the region 12 of the sealing weld to be produced to an extent adequate for the sealing.
- the temperature of the sealing bars 9 and 13 is raised to the temperature Ts and maintained over the period ts. Thereafter the sealing bars 9 , 13 are cooled to an initial temperature Ta which corresponds to the ambient temperature.
- the sealing bars 9 , 13 are here cooled by means of cooling water which passes through cooling holes in the sealing bars 9 , 13 .
- the sealing bars 9 and 13 are first moved away from one another once the temperature has reduced and cooling and thus hardening of the sealing weld has taken place. In this way the risk of the sealing weld adhering to the sealing bars 9 , 13 is reduced.
- the graph in FIG. 5 illustrates in relation to a second variant that the sealing bars 9 , 13 are heated to a pre-heating temperature Tv before the sealing bars 9 , 13 are moved together in order to attain the first temperature T 1 quickly. Following that, the sealing bars 9 , 13 are brought into contact with the packaging material and a contact pressure Ps is established. After the sealing process, cooling occurs to the pre-heating temperature Tv or to a cooling temperature Ta which can correspond to the ambient temperature. The temperature increase from Tv to T 1 can also occur simultaneously or partially overlapping in time with the pressure increase to Ps.
- a contact pressure P 1 is set for the displacement of the product parts 11 , 11 ′.
- This contact pressure P 1 can act during the time t 1 , but also before or after the heating of the sealing bars 9 , 13 to the first temperature T 1 .
- the increase in the contact pressure P 1 to the sealing pressure Ps can be carried out simultaneously with the temperature increase to Ts.
- other variants are conceivable which are not illustrated and in which the pressure increase occurs after or before the temperature increase from the first temperature T 1 to the sealing temperature Ts.
- Cooling takes place to a cooling temperature Ta which preferably corresponds to the ambient temperature or which is set by the active cooling of the sealing bars 9 , 13 .
- a cooling temperature Ta which preferably corresponds to the ambient temperature or which is set by the active cooling of the sealing bars 9 , 13 .
- the sealing bar 9 , 13 is heated to the pre-heating temperature Tv.
- the method according to the disclosure is not restricted to the previously described processes.
- the pressure increase to the contact pressure Ps or P 1 can also occur before, during or after the heating of the sealing bars 9 , 13 to T 1 or Ts.
- the pre-heating temperature Tv can also be equal to the first temperature T 1 at the start of the packaging process.
- the temperature closed-loop control of the sealing bars 9 and 13 occurs using the controller 14 in the same form in order to improve the effect during the packaging process and to speed it up, leading to an increase in the performance of the packaging machine.
Abstract
The disclosure relates to a method for sealing packaging material and a chamber machine or a belted chamber machine for implementation of the method for pre-heating at least one sealing bar to a first temperature in order to facilitate the escape of liquid, preferably
Description
- This application claims foreign priority benefits under 35 U.S.C. §119(a)-(d) to German patent application number DE 102010048401.6, filed Oct. 13, 2010 which is hereby incorporated by reference in its entirety.
- The disclosure relates to a method for sealing packaging material, preferably a bag, and a chamber machine or belted chamber machine for implementing the method.
- From the state of the art, chamber machines and belted chamber machines are known which seal plastic bags under vacuum and/or modified atmosphere. Here, the operator can specify the sealing time, sealing temperature and the time point as a function of the set negative pressure in the chamber. The contact pressure of the sealing bar onto a counter-pressure strip for the sealing process is present here at an adequate level and is set by a pressure reducer. Automatic means of control during the evacuation and sealing process is not provided.
- In DE 19815763 C2 a method is disclosed of improving the detachment of the bag from the sealing bar after sealing in that the sealing bar is heated at a second time point after sealing to a second temperature which is above the sealing temperature.
- In practice, with particular combinations of the material property of the bag and the product and its intended use, requirements arise which cannot be satisfied with the known solutions in sufficient quality and an adequate level of process safety is not provided.
- For example, this occurs when packing products which have a watery wetted surface, e.g. a whole chicken which has had an aqueous marinade rubbed into it. Often the products are packed into so-called “boil-proof” bags which in this case have a high temperature resistance for temperatures of 200° C. or more.
- Compared to the usual plastic bags, this leads to a very narrow sealing temperature range of a few degrees Celsius in which the bag can be sealed. In this respect, if the sealing temperature is set slightly too high to increase the performance or to shorten the sealing times or for the improvement of the sealing, then irreparable melting of the film and an unsealed sealing weld is produced and thus also a packed product which is unsatisfactory and has to be eliminated.
- A further problem is presented by deposits, such as for example product parts of a marinade in the region of the sealing weld, which are present on the inner sides of the bag due to the product filling process. For example, this may be a herbal mixture dissolved in water. Small constituent parts of the herbs, which are located in the region where the sealing weld is to be produced, are enclosed within the sealing weld by both sides of the film. Despite this, they may permit a tight sealing weld and a reliably closed bag. However, at the usual sealing temperatures the presence of moisture or water particles leads to an increase in the volume of the water particles and thus to inadequate sealing, because firstly, the sealing weld is not closed off throughout or secondly, weakening of the sealing weld occurs due to blister formation and local leaks arise due to the inclusion of blisters.
- The object of the present disclosure is to make a method available for sealing packaging material with which the disadvantages described above can be remedied.
- The following steps are provided in a method according to the disclosure for the closure of packaging material in a packaging machine.
- At least one sealing bar is heated to a first temperature before or while contact with the packaging material is established. The first temperature is lower than a sealing temperature and higher than a temperature at which liquid product parts are at least partially disintegrated or dissolved to facilitate escape of the product parts from a region in which the packaging materials are to be sealed together. The first temperature is maintained over a defined holding time.
- The temperature of at least one sealing bar is increased to a sealing temperature and held until sealing of the packaging material is concluded.
- The method is particularly advantageous for packaging in which a product which, for example, has been externally treated with an aqueous marinade, is enclosed by a packaging material, preferably introduced into a bag, and the packaging material or the sealable bag exhibits a particular suitability or a prescribed use by an end user. For example, later the bag with the product can be subjected to a higher temperature in an oven or in boiling water and consequently the packaging material must have a very high required temperature resistance of up to, for example, 250° C. Plastic bags of this nature are for reasons of cost preferably made from a mono-material such as polyamide or nylon.
- The method according to the disclosure is however also suitable for all other currently available packaging materials in permitting product parts to escape from the sealing region.
- With aqueous product parts the first temperature preferably corresponds to a temperature above 40° C. and preferentially the temperature corresponds to the vaporisation temperature of water or it lies in a temperature range of 40° C. to 220° C.
- A preferred embodiment of the method provides for a first pressure, which acts relatively between the sealing bar and a counter-pressure strip or another sealing bar, being lower than a second pressure during the sealing process. In this way the application of heat by the sealing bar into the packaging material and the possibility of the escape of product parts from the sealing region are optimised.
- The packaging material can preferably be a plastic film or a plastic laminated material preferably in the form of a bag.
- Preferably, the packaging material can have a temperature resistance, preferably for boiling or roasting the product, preferably in a range from 120° C. to 250° C.
- Preferably the sealing temperature is higher than 250° C. so that the sealing weld remains closed during boiling or roasting. To permit vapour to escape and for pressure equalisation of an internal pressure which arises, normally small holes are pierced in the packaging material or in the bag, for example with a fork or knife, by the end user.
- To shorten the process time for the packaging process, preferably at least one sealing bar can be heated to a pre-heating temperature before being pressed onto the counter-pressure strip or onto the other sealing bar in order to shorten the warm-up time to the first temperature.
- The process time can preferably also or additionally be brought to a cooling temperature by means of active cooling at which the sealing bar is not immediately removed from the counter-pressure strip or oppositely situated further sealing bar, but instead after the sealing weld has solidified.
- Before sealing, gassing may follow the evacuation process in order to produce a modified atmosphere, or steam purging may occur instead of evacuation.
- A chamber machine or belted chamber machine according to the disclosure for the implementation of the method according to the disclosure comprises a controller which is set up for the closed-loop or open loop control of the temporal progression of the first temperature and the sealing temperature of at least one sealing bar and the pressure of the sealing bar on the counter-pressure strip or the further sealing bar as well as the first time and the sealing time.
- Preferably the controller regulates the temperatures of at least two sealing bars, enclosing the packaging material in order to ensure an optimised heat transfer from the sealing bars into the packaging material and to optimise the complete packaging process.
- Preferably, the controller comprises an input device on which an operator can specify the values, such as temperature, pressure and their temporal progression for a process.
- The method can also be used with packaging processes to heat product parts such as sauces, meat juice and other liquids in the sealing region before the sealing process such that they change their state of aggregation and/or escape from the sealing region due to the temperature change or they can be removed due to the pressure on the film inner sides of the packaging material on the product parts.
- In the following, an advantageous embodiment of the disclosure is presented in more detail with reference to the below drawings.
-
FIG. 1 illustrates a schematic view of a belted chamber machine; -
FIG. 2 a illustrates a schematic view of the inside of a belted chamber machine with a sealing bar in an open position; -
FIG. 2 b illustrates a schematic view of the inside of a belted chamber machine with a sealing bar in a closed position; -
FIG. 3 a illustrates a schematic view of the inside of a belted chamber machine with two oppositely situated sealing bars in an open position, -
FIG. 3 b illustrates a schematic view of the inside of a belted chamber machine with two oppositely situated sealing bars in a closed position, -
FIG. 4 illustrates a time/temperature and a time/pressure graph of a method according to the disclosure; -
FIG. 5 illustrates a time/temperature and a time/pressure graph in a variant; and -
FIG. 6 illustrates a time/temperature and a time/pressure graph in a further variant. - In the figures identical components are designated with the same reference numerals throughout.
-
FIG. 1 illustrates an embodiment of abelted chamber machine 1 with afeed belt 2 on which bags, which are not illustrated, are deposited filled with products. The belted chamber machine has a transport direction R, an insertion end E and an exit end A. In its lowered position, which is not illustrated, a chamberupper part 3 with a machine table 4 forms a closed chamber which can be evacuated. Acontroller 14 controls the processes of thebelted chamber machine 1, displays operational information to an operating person and is used for the operating person to make entries. -
FIG. 2 a illustrates abag 6 and a product 7. The product 7 in thebag 6 is inserted into a chamber machine or several bags are fed to abelted chamber machine 1 via thefeed belt 2. Then the chamber is closed and a vacuum is produced inside the chamber in order to evacuate thebag 6. Here, a neck 8 of the bag is located between a sealing bar 9 and acounter-pressure strip 10. During the evacuation process of the chamber the sealing bar 9 is located in an open position so that the inside of thebag 6 is also evacuated. Once the evacuation is terminated in that a vacuum value set by the operating person is reached, the sealing bar 9, as illustrated inFIG. 2 b, is moved against thecounter-pressure strip 10 and a contact pressure P1 is produced so that the sealing bar 9 comes into contact with thebag 6 and the heat is transferred from the sealing bar 9 to thebag 6. The heating of the sealing bar 9 is realised by means of electrical resistance heating elements, for example, sealing wire. The sealing bar 9 is heated to a first temperature T1 before or during the contact with the neck 8 of the bag. Due to the heating of theproduct residues 11 in the region 12 of the sealing weld to a first temperature T1, theliquid part 11′ of theproduct parts 11 vaporises and escapes from the region 12. This first temperature T1 is lower than a sealing temperature Ts of the packaging material in order to prevent premature sealing. For the subsequent sealing the temperature of the sealing bar 9 is raised to the sealing temperature Ts and also a sealing pressure Ps between the sealing bar 9 and thecounter-pressure strip 10 is produced during a defined period. - It is also conceivable that the contact pressure P1 is the sealing pressure Ps right from the start.
-
FIGS. 3 a respectively 3 b illustrate a variant ofFIGS. 2 a respectively 2 b in which, instead of an unheatedcounter-pressure strip 10, a further heatable sealing bar 13 is present. After producing the contact pressure P1 of the sealing bar 9 on the sealing bar 13, the heat is transferred from the sealing bars 9 and 13, which are heated to the first temperature T1, from both sides onto thebag 6. This gives an efficient and fast heat transfer onto thebag 6. The time for this process or for maintaining the temperature in the sealing bars 9 and 13 at the first temperature T1 can be set by the operating personnel and is regulated by thecontroller 14. - The increase of the temperature on the sealing bars from the first temperature T1 to the sealing temperature Ts can be carried out before, simultaneously or after the increase in pressure from the contact pressure P1 to the higher sealing pressure Ps.
-
FIG. 4 illustrates a t/P (time/pressure) and a t/T (time/temperature) graph which relates to the embodiment of theFIGS. 2 a and 2 b, respectively 3 a and 3 b. - The method according to the disclosure provides for a variant in which the sealing bars 9 and 13 crimp the
bag 6 and a first temperature T1 is transferred to thebag 6 by the contact with it during the (holding) time t1. The temperature T1 is higher or equal to a product temperature Tp which must at least be attained in order to change the state of aggregation of theproduct parts 11. This is preferably carried out until theproduct parts - The graph in
FIG. 5 illustrates in relation to a second variant that the sealing bars 9, 13 are heated to a pre-heating temperature Tv before the sealing bars 9, 13 are moved together in order to attain the first temperature T1 quickly. Following that, the sealing bars 9, 13 are brought into contact with the packaging material and a contact pressure Ps is established. After the sealing process, cooling occurs to the pre-heating temperature Tv or to a cooling temperature Ta which can correspond to the ambient temperature. The temperature increase from Tv to T1 can also occur simultaneously or partially overlapping in time with the pressure increase to Ps. - The sequence of the method is illustrated in a further variant in
FIG. 6 . Here, a contact pressure P1 is set for the displacement of theproduct parts - Cooling takes place to a cooling temperature Ta which preferably corresponds to the ambient temperature or which is set by the active cooling of the sealing bars 9, 13. At the start of a new packaging process the sealing bar 9, 13 is heated to the pre-heating temperature Tv.
- The method according to the disclosure is not restricted to the previously described processes. The pressure increase to the contact pressure Ps or P1 can also occur before, during or after the heating of the sealing bars 9, 13 to T1 or Ts.
- The pre-heating temperature Tv can also be equal to the first temperature T1 at the start of the packaging process.
- In a preferred variant the temperature closed-loop control of the sealing bars 9 and 13 occurs using the
controller 14 in the same form in order to improve the effect during the packaging process and to speed it up, leading to an increase in the performance of the packaging machine. - While embodiments of the disclosure have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the disclosure. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the disclosure.
Claims (20)
1. A method for sealing packaging materials in a packaging machine, the method comprising:
heating a sealing bar before or during establishing a contact with the packaging material to a first temperature, which is lower than a sealing temperature and higher than a temperature at which liquid product parts are at least partially disintegrated to facilitate escape of the product parts from a region in which the packaging material is sealed together and maintaining the first temperature for a defined holding time; and
increasing the temperature of the sealing bar to the sealing temperature and maintaining the sealing temperature until sealing of the packaging material is concluded.
2. The method according to claim 1 , wherein the first temperature is at least 40° C. and corresponds to the vaporization temperature of water.
3. The method according to claim 1 , wherein a first contact pressure, which acts relatively between the sealing bar and a counter-pressure strip or a further sealing bar when they are pressed together, is lower than a sealing pressure during the sealing process in a sealing time.
4. The method according to claim 1 , wherein the packaging material is a plastic film or a plastic laminated material and is preferably a bag.
5. The method according to claim 1 , wherein the packaging material has a temperature resistance in a temperature range from 120° C. to 250° C.
6. The method according to claim 1 , wherein the sealing temperature is higher than 250° C.
7. The method according to claim 3 , wherein the sealing bar is heated to a pre-heating temperature before being pressed against the counter-pressure strip or a further sealing bar.
8. The method according to claim 1 , wherein after sealing, the sealing bar is actively brought to a cooling temperature.
9. The method according to claim 1 , wherein an interchange of gas follows an evacuation process.
10. A belted chamber machine for implementing the method of claim 3 , wherein the belted chamber machine has a controller that is set up to automatically control the temporal progression of the first temperature and the sealing temperature of the sealing bar and the contact pressure of the sealing bar against a counter-pressure strip or against a further sealing bar as well as a holding time for maintaining the first temperature and a sealing time.
11. The belted chamber machine according to claim 10 , wherein the controller is designed for the closed-loop or open-loop control of the temperatures of at least two sealing bars enclosing the packaging material.
12. The belted chamber machine according to claim 10 , wherein the controller comprises an input device on which an operating person can specify the values, such as temperature, pressure and time, needed for a sealing process.
13. The method of claim 5 wherein the packaging material comprises a plastic bag.
14. A method for sealing packaging materials in a packaging machine, the method comprising:
providing a chamber machine having a chamber and a movable belt that feeds into the chamber;
introducing a packaging material containing liquid product parts into the chamber via movement of the belt;
heating a sealing bar before or during establishing a contact with an unsealed portion of the packaging material to a first temperature, which is lower than a sealing temperature and higher than a temperature at which the liquid product parts are at least partially disintegrated to facilitate escape of the liquid product parts from the unsealed portion of the packaging material, and maintaining the first temperature for a defined holding time; and
increasing the temperature of the sealing bar to the sealing temperature and maintaining the sealing temperature until the unsealed portion of the packaging material is sealed.
15. The method of claim 13 , further comprising creating a vacuum inside the chamber after the packaging material has been introduced into the chamber.
16. The method of claim 15 , wherein the first temperature is in a range of 40° C. to 220° C.
17. The method of claim 16 , wherein the packaging material comprises a plastic bag and has a temperature resistance in a range from 120° C. to 25° C.
18. The method according to claim 17 , wherein the sealing temperature is higher than 250° C.
19. The method according to claim 18 , wherein a first contact pressure, which acts relatively between the sealing bar and a counter-pressure strip or a further sealing bar when they are pressed together, is lower than a sealing pressure during the sealing process in a sealing time.
20. A belted chamber machine for sealing packaging material containing product parts, the machine comprising:
a chamber;
a movable belt capable of introducing packaging materials into the chamber;
a sealing bar located in the chamber, the sealing bar capable of being heated before or during establishing a contact with a packaging material to a first temperature, which is lower than a sealing temperature and higher than a second temperature at which the product parts are at least partially disintegrated to facilitate escape of the product parts from a region in which the packaging materials are sealed together;
the first temperature of the sealing bar capable of being maintained for a defined holding time and also being capable of being increased to the sealing temperature and maintained at the sealing temperature until sealing of the packaging materials is concluded; and
a controller associated with the machine, the controller capable of automatically controlling the temporal progression of the first temperature and the sealing temperature of the sealing bar and the contact pressure of the sealing bar against a counter-pressure strip or against a further sealing bar as well as a holding time for maintaining the first temperature and a sealing time.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102010048401A DE102010048401B4 (en) | 2010-10-13 | 2010-10-13 | Method and chamber machine for sealing packaging material |
DE102010048401.6 | 2010-10-13 |
Publications (1)
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US20120110956A1 true US20120110956A1 (en) | 2012-05-10 |
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US13/271,747 Abandoned US20120110956A1 (en) | 2010-10-13 | 2011-10-12 | Method and chamber machine for sealing packaging material |
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US (1) | US20120110956A1 (en) |
EP (1) | EP2441570A3 (en) |
DE (1) | DE102010048401B4 (en) |
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US20180319523A1 (en) * | 2015-11-10 | 2018-11-08 | Cryovac, Inc. | Apparatus and process for evacuation of packages |
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DE102011075986A1 (en) | 2010-11-02 | 2012-05-03 | Rovema Gmbh | Method for energy-efficient sealing of tubular bags |
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EP4212310A1 (en) * | 2022-01-14 | 2023-07-19 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method and device for joining plastic films by thermal joining and use of an impact press |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US20140069057A1 (en) * | 2012-09-10 | 2014-03-13 | Multivac Sepp Haggenmuller Gmbh & Co. Kg | Method for operating a chamber packaging machine |
US9550595B2 (en) * | 2012-09-10 | 2017-01-24 | Multivac Sepp Haggenmueller Se & Co. Kg | Method for operating a chamber packaging machine |
US20150027089A1 (en) * | 2012-10-22 | 2015-01-29 | Sunbeam Products, Inc. | Vacuum Packaging and Sealing Appliance with Cooling Fan |
US20140305586A1 (en) * | 2013-04-15 | 2014-10-16 | Miller Weldmaster Corporation | Hot wedge welding machine and method of operation |
US9446555B2 (en) * | 2013-04-15 | 2016-09-20 | Miller Weldmaster Corporation | Hot wedge welding machine and method of operation |
US10029407B2 (en) | 2014-12-04 | 2018-07-24 | Big Heart Pet, Inc. | Apparatus, processes, and systems for heat sealing |
US20180319523A1 (en) * | 2015-11-10 | 2018-11-08 | Cryovac, Inc. | Apparatus and process for evacuation of packages |
US10906677B2 (en) * | 2015-11-10 | 2021-02-02 | Cryovac, Llc | Apparatus and process for evacuation of packages |
NL2017540B1 (en) * | 2016-09-27 | 2018-04-04 | Audion Elektro Bv | Heat sealing apparatus |
EP3366596A1 (en) * | 2017-02-28 | 2018-08-29 | Immobles del Segria, S.L. | Method for vacuum packaging food |
CN113415481A (en) * | 2021-07-13 | 2021-09-21 | 许雪霞 | Puffed food inflatable packaging system |
CN115402603A (en) * | 2022-11-02 | 2022-11-29 | 江西仟方智能科技有限公司 | Herbal pieces-packing sealing drying device |
Also Published As
Publication number | Publication date |
---|---|
DE102010048401B4 (en) | 2013-01-31 |
EP2441570A3 (en) | 2015-04-15 |
DE102010048401A1 (en) | 2012-04-19 |
EP2441570A2 (en) | 2012-04-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MULTIVAC SEPP HAGGENMUELLER GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MILLER, DIETMAR;REEL/FRAME:027573/0530 Effective date: 20120109 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |