WO1995030526A1 - Travelling mold with separation of mold blocks - Google Patents
Travelling mold with separation of mold blocks Download PDFInfo
- Publication number
- WO1995030526A1 WO1995030526A1 PCT/CA1995/000220 CA9500220W WO9530526A1 WO 1995030526 A1 WO1995030526 A1 WO 1995030526A1 CA 9500220 W CA9500220 W CA 9500220W WO 9530526 A1 WO9530526 A1 WO 9530526A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mold
- block sections
- mold block
- travelling
- auger
- Prior art date
Links
Classifications
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/34—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station
- B29C33/36—Moulds or cores; Details thereof or accessories therefor movable, e.g. to or from the moulding station continuously movable in one direction, e.g. in a closed circuit
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
- B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/0015—Making articles of indefinite length, e.g. corrugated tubes
- B29C49/0021—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports
- B29C49/0022—Making articles of indefinite length, e.g. corrugated tubes using moulds or mould parts movable in a closed path, e.g. mounted on movable endless supports characterised by mould return means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
Definitions
- TITLE TRAVELLING MOLD WITH SEPARATION OF MOLD BLOCKS
- the present invention relates to a travelling mold having a drive system which provides for separation of the mold block sections over part of the length of the endless track in which the mold block sections travel.
- a travelling mold for the manufacturing of ribbed pipe and the like uses mold block sections having a sophisticated construction required for the accurate formation of the pipe. Specific pipe grooves must be provided in the mold block sections to shape the ribbing on the pipe and air channels must be provided in order to move the plastic material forming the pipe through either positive or negative pressure into the grooves.
- the present invention provides a travelling mold having mold block sections which are driven around an endless track.
- the mold has a drive system including a first drive component which drives the mold block sections in abutting positions as they travel in the mold tunnel to a second component in the drive system which accelerates and separates the mold block sections and which then decelerates and regroups the mold block sections in their abutting positions before the mold block sections are returned to the first drive component.
- the mold block sections are not maintained side by side with one another completely around the length of the mold track, but rather large gaps are provided between the mold block sections in certain regions of the track. Therefore a mold built in accordance with the present invention uses fewer mold block sections with considerable cost saving in comparison to the same length mold built using side by side mold sections completely around the mold as found in the prior art construction.
- Figure 1 is a side view of a travelling mold made in accordance with a preferred embodiment of the present invention
- Figure 2 is a perspective view of an upper region along one side of the mold of Figure 1;
- Figure 3 is a schematic view showing operation of the mold of Figure 1;
- Figure 4 is a further schematic view of a part of a travelling mold according to another preferred embodiment of the invention;
- Figure 5 is a perspective view of a travelling mold in accordance with still a further preferred embodiment of the present invention.
- Figure 1 shows a travelling mold comprising an upper mold loop generally indicated at 1 and a lower mold loop generally indicated at 2.
- Each of these mold loops is formed with a plurality of mold block sections 3 which travel continuously within a track around each of the loops.
- the mold block sections would be bunched tightly up against one another completely around each of the loops.
- this is not the case in accordance with the present invention for reasons described below.
- the travelling mold shown in Figure 1 includes a mold tunnel or channel generally indicated at 5. This is the area of the mold- in which the mold block sections from loop 1 close with the mold block sections from the loop 2 to provide a tunnel or channel for the production of plastic pipe P. After the pipe is formed, the mold block sections in each of the loops release or open from one another as they travel outwardly around the end of the loop. As each set of facing mold block sections from the loops 1 and 2 enter the mold tunnel 5, they are picked up by a drive gear in the form of a sprocket S. This sprocket, which is positively driven by a motor, pushes the individual mold block sections into the tunnel.
- the next upstream mold block section is then picked up by the sprocket and pushes the side by side abutting downstream mold block sections through the tunnel. Accordingly, only one positively driven sprocket is required at the upstream end of the tunnel.
- Sprocket SI is not motor driven but rather is turned by the mold block sections which are pushed by the upstream sprocket S and therefore merely acts as a guide for guiding the mold block sections around the end of the track or loop in which they travel.
- each return path is provided with a further component of the drive system in the form of a pair of augers 7 at both the upper and lower loops of the travelling mold.
- Figure 2 shows one of the augers 7 to one side of the mold block sections while Figure 3 shows both of the augers to each side of the mold block sections at both the upper and lower loops of the travelling mold.
- Augers 7 like sprockets SI are not motor driven but rather are operated by the action of the mold block sections being pushed onto them.
- each mold block section 3 is provided with a pair of guides 4 and 4a extending out to the side of the carrier 6 on which each mold block section is mounted.
- Figure 2 only shows one side of the carrier 6, it is to be understood that the opposite side of the carrier has the same construction as that shown in Figure 2, i.e. guides 4 and 4a are provided to both sides of the carrier.
- the guides 4 and 4a on the carrier 6 are slightly gapped from one another providing a tooth grip opening between the guides for the teeth on sprockets S and SI when the mold block sections are moved through the mold tunnel.
- the guides 4 and 4a cooperate with the augers 7 in moving the mold block sections along the length of the auger.
- each of the augers 7 is provided with a helical thread 13.
- Thread 13 is relatively tightly wound at both the upstream end 9 and the downstream end 11 of the auger. The thread has a much greater spreading or separation of the thread over the main center part of the auger.
- augers for the upper loop must match the augers for the lower loop so that the mold block sections in both loops remain synchronized with one another.
- the guide rollers 4 and 4a are picked up by the auger thread and fed along the auger.
- the opening of the thread winding causes the mold block sections to initially accelerate and as they reach the more widely spread winding on the thread, they move across the auger at a substantially greater speed than any of the mold block sections which are not carried by the auger. Therefore, the mold block sections moving in the opposite direction through the mold tunnel move at a much slower speed than the mold block sections which travel across the auger.
- the mold block sections are slowed down to the speed at which they initially entered the auger and they are again placed side by side with one another where each mold block section forces the adjacent downstream mold block section to return to the drive sprocket S at the upstream end of the mold tunnel. Therefore, the sprocket 5 drives the mold block sections completely around the mold and back onto itself.
- the travelling mold of the present invention eliminates the requirement to have mold block sections maintained in side by side relationship completely around the mold.
- a travelling mold can either be made longer with the resultant benefits from its increased length using the same number of mold blocks or mold block sections as found in a much shorter mold.
- the mold length is not increased, then fewer mold blocks can be used. In both cases, there are substantial cost savings.
- Figure 3 of the drawings shows in perspective sets of augers 7 provided both above and below the mold tunnel. This figure is therefore representative of mold shown in Figures 1 and 2 of the drawings.
- Figure 4 shows features from a mold generally indicated at la including mold blocks 3a which pass along a mold tunnel 5a.
- the mold blocks in the return path of the loop are not shown in Figure 4.
- Figure 4 is the provision of pairs of augers 7a to opposite sides of the mold tunnel rather than above and below the mold tunnel as shown in Figure 3. Accordingly, the concept of accelerating and separating mold block Sections along the return path of a mold loop is equally applicable to mold which operates with loops rotating in a horizontal direction.
- Figure 5 again shows a modification of the present invention used with a travelling mold generally indicated at lb.
- This mold is different in that the mold block sections 3b are all contained within a single loop. These mold block sections which hinge relative to one another are closed through the mold tunnel region 5b of the mold and are opened along the return path 6b of the mold. A pair of augers 7b are provided along this return path and provide for acceleration, separation and then deceleration of the mold blocks before they are returned to the mold tunnel in the same manner as that described with respect to the earlier embodiments. Therefore, although the bulk of the description above relates to multiple track molds, it will be clearly seen in Figure 5 that the same concept is equally applicable to a single track travelling mold.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7528560A JP2966101B2 (en) | 1994-05-06 | 1995-04-20 | Moving mold with mold block separation |
DE69502492T DE69502492T2 (en) | 1994-05-06 | 1995-04-20 | CONTINUOUS SHAPE WITH SEPARATION OF MOLD BLOCKS |
EP95915720A EP0758289B1 (en) | 1994-05-06 | 1995-04-20 | Travelling mold with separation of mold blocks |
CA002187865A CA2187865C (en) | 1994-05-06 | 1995-04-20 | Travelling mold with separation of mold blocks |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/239,124 US5531585A (en) | 1994-05-06 | 1994-05-06 | Travelling mold with separation of mold blocks |
US08/239,124 | 1994-05-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1995030526A1 true WO1995030526A1 (en) | 1995-11-16 |
WO1995030526B1 WO1995030526B1 (en) | 1995-12-07 |
Family
ID=22900718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA1995/000220 WO1995030526A1 (en) | 1994-05-06 | 1995-04-20 | Travelling mold with separation of mold blocks |
Country Status (9)
Country | Link |
---|---|
US (1) | US5531585A (en) |
EP (1) | EP0758289B1 (en) |
JP (1) | JP2966101B2 (en) |
CN (1) | CN1057724C (en) |
AT (1) | ATE166022T1 (en) |
CA (1) | CA2187865C (en) |
DE (1) | DE69502492T2 (en) |
ES (1) | ES2116743T3 (en) |
WO (1) | WO1995030526A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1044775A2 (en) * | 1999-04-01 | 2000-10-18 | FRÄNKISCHE ROHRWERKE, GEBR. KIRCHNER GmbH & Co. | Corrugator with means to exchange moulding elements |
ITUA20162083A1 (en) * | 2016-03-29 | 2017-09-29 | Itib Machinery Int S R L | Machine for the continuous production of corrugated pipe |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2755639B1 (en) * | 1996-11-12 | 1999-01-29 | Onduline Sa | MACHINE FOR REPROFILING OF CORRUGATED MATERIALS |
DE19717026C2 (en) * | 1997-04-23 | 2001-05-17 | Daimler Chrysler Ag | Extrusion device |
JP4083313B2 (en) * | 1997-12-10 | 2008-04-30 | 日清紡績株式会社 | Friction member, manufacturing apparatus and manufacturing method thereof |
ES2193433T3 (en) * | 1998-04-16 | 2003-11-01 | Sapsa Bedding S R L | PROCEDURE AND INSTALLATION FOR MANUFACTURING LATEX FOAM PRODUCTS. |
US6312244B1 (en) * | 1998-04-16 | 2001-11-06 | Sapsa Bedding Spa | Plant for manufacture of foam products |
US6749418B2 (en) | 1998-08-20 | 2004-06-15 | Scott A. W. Muirhead | Triple sheet thermoforming apparatus |
US6294114B1 (en) | 1998-08-20 | 2001-09-25 | Scott A. W. Muirhead | Triple sheet thermoforming apparatus, methods and articles |
US6661339B2 (en) | 2000-01-24 | 2003-12-09 | Nextreme, L.L.C. | High performance fuel tank |
US8077040B2 (en) | 2000-01-24 | 2011-12-13 | Nextreme, Llc | RF-enabled pallet |
US6943678B2 (en) | 2000-01-24 | 2005-09-13 | Nextreme, L.L.C. | Thermoformed apparatus having a communications device |
US7342496B2 (en) | 2000-01-24 | 2008-03-11 | Nextreme Llc | RF-enabled pallet |
EP2455047A1 (en) * | 2010-11-22 | 2012-05-23 | BIKOMA AG Spezialmaschinen | Moulding station for producing moulded bodies |
CN102974780B (en) * | 2012-12-08 | 2014-10-22 | 太原理工大学 | Manganese alloy continuous casting and moulding granulating equipment |
EP3037237B1 (en) * | 2014-12-19 | 2020-02-05 | Cannon S.p.A. | Method and apparatus for foaming objects |
CN111438919A (en) * | 2020-04-10 | 2020-07-24 | 重庆茂森塑料制品有限公司 | Continuous automatic production line for plastic bottles in batches |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2210022A1 (en) * | 1972-12-13 | 1974-07-05 | Telecommunications Sa | |
EP0005104A1 (en) * | 1978-04-24 | 1979-10-31 | Armosig S.A. | Apparatus for the continuous production of finned tubular bodies of synthetic plastics and the corresponding finned tubular bodies |
EP0270694A1 (en) * | 1986-11-13 | 1988-06-15 | UNICOR GmbH Rahn Plastmaschinen | Apparatus for the continuous production of pipes with an irregular cross-section |
JPH02134227A (en) * | 1988-11-15 | 1990-05-23 | Mirai Ind Co Ltd | Extrusion molding apparatus for continuous length resin molding |
WO1994007673A1 (en) * | 1992-09-25 | 1994-04-14 | Big 'o' Inc. | Apparatus and method for the production of thermoplastic pipe or tubing |
EP0621120A2 (en) * | 1993-04-15 | 1994-10-26 | CULLOM MACHINE TOOL & DIE, INC. | Plastic tube corrugator and mold blocks |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2832350A1 (en) * | 1978-07-22 | 1980-01-31 | Wilhelm Hegler | DEVICE FOR PRODUCING PIPES FROM THERMOPLASTIC PLASTIC WITH CROSS-PROFILING |
DE69003109T2 (en) * | 1989-10-30 | 1994-04-21 | Manfred Arno Alfred Lupke | METHOD FOR PRODUCING PLASTIC PIPES WITH HINGE-OPENING AND CLOSING HALVES. |
-
1994
- 1994-05-06 US US08/239,124 patent/US5531585A/en not_active Expired - Lifetime
-
1995
- 1995-04-20 JP JP7528560A patent/JP2966101B2/en not_active Expired - Fee Related
- 1995-04-20 CA CA002187865A patent/CA2187865C/en not_active Expired - Fee Related
- 1995-04-20 CN CN95192937A patent/CN1057724C/en not_active Expired - Fee Related
- 1995-04-20 EP EP95915720A patent/EP0758289B1/en not_active Expired - Lifetime
- 1995-04-20 DE DE69502492T patent/DE69502492T2/en not_active Expired - Lifetime
- 1995-04-20 ES ES95915720T patent/ES2116743T3/en not_active Expired - Lifetime
- 1995-04-20 WO PCT/CA1995/000220 patent/WO1995030526A1/en active IP Right Grant
- 1995-04-20 AT AT95915720T patent/ATE166022T1/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2210022A1 (en) * | 1972-12-13 | 1974-07-05 | Telecommunications Sa | |
EP0005104A1 (en) * | 1978-04-24 | 1979-10-31 | Armosig S.A. | Apparatus for the continuous production of finned tubular bodies of synthetic plastics and the corresponding finned tubular bodies |
EP0270694A1 (en) * | 1986-11-13 | 1988-06-15 | UNICOR GmbH Rahn Plastmaschinen | Apparatus for the continuous production of pipes with an irregular cross-section |
JPH02134227A (en) * | 1988-11-15 | 1990-05-23 | Mirai Ind Co Ltd | Extrusion molding apparatus for continuous length resin molding |
WO1994007673A1 (en) * | 1992-09-25 | 1994-04-14 | Big 'o' Inc. | Apparatus and method for the production of thermoplastic pipe or tubing |
EP0621120A2 (en) * | 1993-04-15 | 1994-10-26 | CULLOM MACHINE TOOL & DIE, INC. | Plastic tube corrugator and mold blocks |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 14, no. 373 (M - 1009)<4316> 13 August 1990 (1990-08-13) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1044775A2 (en) * | 1999-04-01 | 2000-10-18 | FRÄNKISCHE ROHRWERKE, GEBR. KIRCHNER GmbH & Co. | Corrugator with means to exchange moulding elements |
EP1044775A3 (en) * | 1999-04-01 | 2002-08-28 | FRÄNKISCHE ROHRWERKE, GEBR. KIRCHNER GmbH & Co. | Corrugator with means to exchange moulding elements |
ITUA20162083A1 (en) * | 2016-03-29 | 2017-09-29 | Itib Machinery Int S R L | Machine for the continuous production of corrugated pipe |
Also Published As
Publication number | Publication date |
---|---|
CA2187865A1 (en) | 1995-11-16 |
JP2966101B2 (en) | 1999-10-25 |
CN1154085A (en) | 1997-07-09 |
US5531585A (en) | 1996-07-02 |
DE69502492D1 (en) | 1998-06-18 |
ES2116743T3 (en) | 1998-07-16 |
ATE166022T1 (en) | 1998-05-15 |
EP0758289A1 (en) | 1997-02-19 |
CN1057724C (en) | 2000-10-25 |
EP0758289B1 (en) | 1998-05-13 |
CA2187865C (en) | 2004-07-06 |
JPH09511958A (en) | 1997-12-02 |
DE69502492T2 (en) | 1998-12-17 |
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