CA2129009A1 - Injection molding of plastic article having hollow rib - Google Patents

Injection molding of plastic article having hollow rib

Info

Publication number
CA2129009A1
CA2129009A1 CA002129009A CA2129009A CA2129009A1 CA 2129009 A1 CA2129009 A1 CA 2129009A1 CA 002129009 A CA002129009 A CA 002129009A CA 2129009 A CA2129009 A CA 2129009A CA 2129009 A1 CA2129009 A1 CA 2129009A1
Authority
CA
Canada
Prior art keywords
article
channel
rib portion
injection molding
plastic
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.)
Granted
Application number
CA002129009A
Other languages
French (fr)
Other versions
CA2129009C (en
Inventor
James W. Hendry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Melea Ltd
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25247728&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2129009(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Publication of CA2129009A1 publication Critical patent/CA2129009A1/en
Application granted granted Critical
Publication of CA2129009C publication Critical patent/CA2129009C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • B29C33/0055—Moulds or cores; Details thereof or accessories therefor with incorporated overflow cavities
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/1729—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles fluid venting means
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C2045/173—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles using a plurality of fluid injection nozzles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A process and apparatus for injection molding and a plastic article having a hollow rib portion (72) is formed utilizing a spill cavity (73). The process includes the steps of sequentially injecting fluent plastic and gas into a mold cavity having a space defining at least one wall portion of the article and a channel (66) defining a rib portion (72) of the article. A quantity of fluent plastic is initially injected to substantially fill the mold cavity. A charge of pressurized gas is then injected into the channel (66) of the mold cavity to displace a portion of the still fluent plastic into the spill cavity (73) which is flow coupled to the channel (66).
Preferably; the thickness of the rib portion (72) in cross section is at least twice as large as the thickness of the wall portion in cross section along the entire length of the rib portion (72). Also, preferably, the channel (66) is tapered along its length. The rib portion may be either internal or external to the article.
CA002129009A 1992-01-28 1992-12-15 Injection molding of plastic article having hollow rib Expired - Fee Related CA2129009C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/826,865 US5225141A (en) 1988-07-11 1992-01-28 Process for injection molding a hollow plastic article
US826,865 1992-01-28
PCT/US1992/010864 WO1993014916A1 (en) 1992-01-28 1992-12-15 Injection molding of plastic article having hollow rib

Publications (2)

Publication Number Publication Date
CA2129009A1 true CA2129009A1 (en) 1993-08-05
CA2129009C CA2129009C (en) 2002-06-25

Family

ID=25247728

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002129009A Expired - Fee Related CA2129009C (en) 1992-01-28 1992-12-15 Injection molding of plastic article having hollow rib

Country Status (12)

Country Link
US (2) US5225141A (en)
EP (1) EP0625089B2 (en)
KR (1) KR0164909B1 (en)
CN (1) CN1041809C (en)
AU (1) AU668124B2 (en)
BR (1) BR9207068A (en)
CA (1) CA2129009C (en)
DE (2) DE69219157T3 (en)
ES (1) ES2103074T3 (en)
GB (1) GB2264449B (en)
NO (1) NO303972B1 (en)
WO (1) WO1993014916A1 (en)

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GB9114324D0 (en) * 1991-07-03 1991-08-21 Kontor Moulding Systems Ltd Injection moulding of thermoplastic polymers
US5968446A (en) * 1992-10-28 1999-10-19 Toyoda Gosei Co., Ltd. Molded resin body and method for producing the same
SG47507A1 (en) * 1993-03-09 1998-04-17 Stevens Smith & Bartlett Pty L Method of manufacturing needles
DE4336243C2 (en) * 1993-10-23 1996-05-15 Hydac Technology Gmbh Process for the injection molding of hollow plastic bodies and device for carrying out the process
US5436779A (en) * 1994-03-31 1995-07-25 Read-Rite Corporation Integrated yoke magnetoresistive transducer with magnetic shunt
JPH089294A (en) * 1994-06-17 1996-01-12 Sony Corp Television cabinet
WO1996022872A1 (en) * 1995-01-27 1996-08-01 Philips Electronics N.V. Method and mould for injection-moulding of a product, and product manufactured by the method
GB2299966B (en) * 1995-04-12 1998-07-15 Rover Group A dashboard for a motor vehicle
DE19518963C2 (en) * 1995-05-23 1998-04-09 Eldra Kunststofftechnik Gmbh Method and device for injection molding hollow-blown plastic bodies
DE19518964C2 (en) * 1995-05-23 1998-04-09 Eldra Kunststofftechnik Gmbh Method and device for injection molding hollow-blown plastic bodies
DE19543944C2 (en) * 1995-11-25 1998-04-09 Battenfeld Gmbh Process for the manufacture of plastic objects
DE19607992A1 (en) * 1996-03-04 1997-09-11 Battenfeld Gmbh Process for producing an injection molded part made of thermoplastic and injection molded part
SE508096C2 (en) * 1996-12-04 1998-08-24 Volvo Lastvagnar Ab Gas injection molded hollow plastic detail and method and apparatus for its manufacture
US5788917A (en) * 1997-05-27 1998-08-04 General Motors Corporation Method of making a plastic article
US5997797A (en) * 1997-06-24 1999-12-07 Jac Products, Inc. Injection mold internal pressure equalization system and method
DE19750523B4 (en) * 1997-11-14 2007-08-02 Vereinigung zur Förderung des Instituts für Kunststoffverarbeitung in Industrie und Handwerk an der RWTH Aachen Process for the production of finned components according to the gas injection technique
US6037038A (en) * 1998-03-30 2000-03-14 Textron Automotive Company Inc. Vehicle interior trim member having integrally molded hollow assist handle
US6322865B1 (en) 1998-07-13 2001-11-27 Patent Holding Company Hollow plastic article formed by a gas-assisted injection molding system
US6119406A (en) * 1998-12-16 2000-09-19 Patent Holding Company Door trim panel assembly and plastic inner panel for use therein
US6364346B1 (en) 1999-02-10 2002-04-02 Patent Holding Company Motor vehicle trim assembly including a hollow plastic panel for a side impact inflatable air bag system
US6386849B1 (en) 1999-12-06 2002-05-14 Caco Pacific Corporation Multi-component mold
DE60106795T2 (en) 2000-02-29 2005-10-27 Kyoraku Co., Ltd. Hollow blow-molded article; Manufacturing method for such an article and apparatus for its production
US6669301B1 (en) * 2000-11-28 2003-12-30 Steelcase Development Corporation Furniture article having panel and integral perimeter frame
US6821100B2 (en) 2002-09-06 2004-11-23 Caco Pacific Corporation Multi-component mold with rotatable mandrels
US7416194B2 (en) * 2005-09-19 2008-08-26 Target Brands, Inc. Shopping cart base
USD530478S1 (en) 2005-09-19 2006-10-17 Target Brands, Inc. Shopping cart
JP5114950B2 (en) * 2006-02-13 2013-01-09 日産自動車株式会社 Battery module, assembled battery, and vehicle equipped with these batteries
US7766347B2 (en) 2006-11-09 2010-08-03 Traget Brands, Inc. Seat assembly for a shopping cart
US7780902B2 (en) * 2007-01-05 2010-08-24 Target Brands, Inc. Method of molding a shopping cart
DE102012011173A1 (en) 2012-06-06 2013-12-12 Vereinigung zur Förderung des Instituts für Kunststoffverarbeitung in Industrie und Handwerk an der Rhein.-Westf. Technischen Hochschule Aachen e.V. Method for manufacturing multi-component body, particularly multicomponent compact mold portions and hollow bodies, involves driving displacement body from polymeric material component by another polymeric material component
DE102013010541A1 (en) 2013-06-25 2015-01-08 Vereinigung zur Förderung des Instituts für Kunststoffverarbeitung in Industrie und Handwerk an der Rhein.-Westf. Technischen Hochschule Aachen e.V. Process for producing polymeric hollow bodies by means of rocket injection technology (RIT)
US9293160B1 (en) 2015-02-06 2016-03-22 HGST Netherlands B.V. Magnetic stabilization and scissor design for anomalous hall effect magnetic read sensor
US10759099B2 (en) 2018-03-05 2020-09-01 Ford Global Technologies, Llc Water-assisted injection molded cross-car beam

Family Cites Families (19)

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US3044118A (en) * 1958-06-23 1962-07-17 Du Pont Molding method and apparatus
DE2501314A1 (en) * 1975-01-15 1976-07-22 Roehm Gmbh INJECTION MOLDING OF HOLLOW MOLDED PARTS MADE OF THERMOPLASTIC PLASTICS, IN PARTICULAR FOR THE CONSTRUCTION SECTOR
US4136220A (en) * 1976-07-14 1979-01-23 Union Carbide Corporation Process for the molding of plastic structural web and the resulting articles
US4935191A (en) * 1986-10-16 1990-06-19 Thomas W. Johnson Process of insection molding with pressurized gas assist
JPH0788025B2 (en) † 1987-04-28 1995-09-27 三菱瓦斯化学株式会社 Manufacturing method of synthetic resin molded product having uneven wall reinforcement structure
US4781554A (en) * 1987-07-09 1988-11-01 Michael Ladney Apparatus for the injection molding of thermoplastics
US4855094A (en) * 1987-09-21 1989-08-08 Michael Ladney Method for the injection molding of plastic articles using fluid pressure
DE321117T1 (en) † 1987-12-16 1993-09-02 Ladney Jun., Michael, Grosse Pointe Shores, Mich., Us METHOD AND SYSTEM FOR INJECTION MOLDING ASSISTED BY LOCAL FLUIDIUM AND BODY PRODUCED BY IT.
US5069859A (en) * 1987-12-16 1991-12-03 Milad Limited Partnership Method of injection molding with pressurized-fluid assist
DE3880456D1 (en) * 1987-12-23 1993-05-27 Bruker Franzen Analytik Gmbh METHOD FOR THE MASS SPECTROSCOPIC EXAMINATION OF A GAS MIXTURE AND MASS SPECTROMETER FOR CARRYING OUT THIS METHOD.
US5098637A (en) † 1988-07-11 1992-03-24 Milad Limited Partnership Process for injection molding and hollow plastic article produced thereby
DE3913109C5 (en) * 1989-04-21 2010-03-18 Ferromatik Milacron Maschinenbau Gmbh Method for injection molding of fluid-filled plastic body and device for carrying out the method
JPH03290216A (en) * 1989-12-25 1991-12-19 Sekisui Chem Co Ltd Mold for gas force feed molding
JP2677437B2 (en) * 1989-12-29 1997-11-17 積水化学工業株式会社 Gas press-fitting mold
US5028377A (en) * 1990-03-05 1991-07-02 Michael Ladney Method for injection molding plastic article with gas-assistance
US5044924A (en) * 1990-06-08 1991-09-03 Loren Norman S Gas assisted injection molding apparatus
JP2788670B2 (en) * 1990-07-20 1998-08-20 本田技研工業株式会社 Resin hollow molding
US5110533A (en) * 1990-11-07 1992-05-05 Milad Limited Partnership Method for the use of gas assistance in the molding of plastic articles to enhance surface quality
US5186884A (en) * 1991-06-06 1993-02-16 Milad Limited Partnership Method of injection molding with pressurized fluid assist

Also Published As

Publication number Publication date
AU3322293A (en) 1993-09-01
DE69219157D1 (en) 1997-05-22
KR950700157A (en) 1995-01-16
EP0625089A4 (en) 1995-05-03
BR9207068A (en) 1995-12-05
NO942786D0 (en) 1994-07-27
GB9301643D0 (en) 1993-03-17
AU668124B2 (en) 1996-04-26
NO942786L (en) 1994-08-30
DE69219157T2 (en) 1997-11-13
DE69219157T3 (en) 2004-11-25
GB2264449A (en) 1993-09-01
EP0625089A1 (en) 1994-11-23
US5324189A (en) 1994-06-28
CN1076887A (en) 1993-10-06
GB2264449B (en) 1996-08-14
KR0164909B1 (en) 1999-03-20
EP0625089B1 (en) 1997-04-16
CA2129009C (en) 2002-06-25
DE4300397C2 (en) 1996-07-11
WO1993014916A1 (en) 1993-08-05
DE4300397A1 (en) 1993-07-29
NO303972B1 (en) 1998-10-05
ES2103074T3 (en) 1997-08-16
EP0625089B2 (en) 2004-04-21
US5225141A (en) 1993-07-06
CN1041809C (en) 1999-01-27

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