GB1226135A - - Google Patents

Info

Publication number
GB1226135A
GB1226135A GB1226135DA GB1226135A GB 1226135 A GB1226135 A GB 1226135A GB 1226135D A GB1226135D A GB 1226135DA GB 1226135 A GB1226135 A GB 1226135A
Authority
GB
United Kingdom
Prior art keywords
composition
pressure
mould cavity
fluid
injection
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.)
Expired
Application number
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
Application filed filed Critical
Publication of GB1226135A publication Critical patent/GB1226135A/en
Expired 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/10—Applying counter-pressure during expanding
    • B29C44/105—Applying counter-pressure during expanding the counterpressure being exerted by a fluid

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

1,226,135. Injection moulding. CHEMISCHE WERKE HULS A.G. 9 Aug., 1968 [12 Aug., 1967], No. 38188/68. Heading B5A. Foamed plastics articles are produced by injecting a thermoplastic plastics composition containing an expanding agent into a mould cavity filled with fluid under a pressure of such magnitude sufficient to keep the composition in an unexpanded state during the injection stage, and controlling the escape of the pressure fluid from the cavity during the injection and expansion of the composition. The amount of composition injected corresponds to the desired weight of the moulded article. The fluid may be heated and the mould cavity pressure may be decreased to below atmospheric during the expansion of the composition. Pressure regulating valves may be connected to the mould cavity via passages and pipe connections.
GB1226135D 1967-08-12 1968-08-09 Expired GB1226135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC0043099 1967-08-12

Publications (1)

Publication Number Publication Date
GB1226135A true GB1226135A (en) 1971-03-24

Family

ID=7025224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226135D Expired GB1226135A (en) 1967-08-12 1968-08-09

Country Status (2)

Country Link
DE (1) DE1704544A1 (en)
GB (1) GB1226135A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031176A (en) * 1971-05-03 1977-06-21 The General Tire & Rubber Company Method of injection molding expanded thermoplastics and articles produced thereby
US4096218A (en) * 1973-07-19 1978-06-20 Asahi-Dow Limited Method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks
EP0034582A4 (en) * 1979-08-24 1981-08-27 Ex Cell O Corp Method for injection moulding foamed resin parts with a smooth finish.
FR2622504A1 (en) * 1987-10-31 1989-05-05 Ikeda Bussan Co DEVICE AND METHOD FOR MAKING AN EXPANDED PLASTIC ARTICLE COVERED WITH AN ENVELOPE
FR2622503A1 (en) * 1987-10-31 1989-05-05 Ikeda Bussan Co METHOD FOR MAKING AN EXPANDED PLASTIC PRODUCT COVERED WITH AN ENVELOPE
US4952365A (en) * 1984-09-14 1990-08-28 Asahi Kasei Kogyo Kabushiki Kaisha Process for molding of a foamed article
EP0464953A1 (en) * 1990-07-04 1992-01-08 Airex AG Method of forming an article consisting of a foam core and one or more covering layers
EP2402138A1 (en) * 2009-02-27 2012-01-04 Prime Polymer Co., Ltd. Injection foam molding method and apparatus therefor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031176A (en) * 1971-05-03 1977-06-21 The General Tire & Rubber Company Method of injection molding expanded thermoplastics and articles produced thereby
US4096218A (en) * 1973-07-19 1978-06-20 Asahi-Dow Limited Method of producing foamed thermoplastic resin articles having smooth and glossy surfaces free from swirl marks and hair cracks
EP0034582A4 (en) * 1979-08-24 1981-08-27 Ex Cell O Corp Method for injection moulding foamed resin parts with a smooth finish.
EP0034582A1 (en) * 1979-08-24 1981-09-02 Ex-Cell-O Corporation Method for injection moulding foamed resin parts with a smooth finish
US4952365A (en) * 1984-09-14 1990-08-28 Asahi Kasei Kogyo Kabushiki Kaisha Process for molding of a foamed article
GB2211781A (en) * 1987-10-31 1989-07-12 Ikeda Bussan Co Method of producing skin-covered foamed plastic article
FR2622503A1 (en) * 1987-10-31 1989-05-05 Ikeda Bussan Co METHOD FOR MAKING AN EXPANDED PLASTIC PRODUCT COVERED WITH AN ENVELOPE
GB2211782A (en) * 1987-10-31 1989-07-12 Ikeda Bussan Co Method of producing skin-covered foamed plastic article
FR2622504A1 (en) * 1987-10-31 1989-05-05 Ikeda Bussan Co DEVICE AND METHOD FOR MAKING AN EXPANDED PLASTIC ARTICLE COVERED WITH AN ENVELOPE
GB2211782B (en) * 1987-10-31 1991-11-13 Ikeda Bussan Co Method of producing skin-covered foamed plastic article
GB2211781B (en) * 1987-10-31 1993-04-28 Ikeda Bussan Co Method of producing skin-covered foamed plastic article
EP0464953A1 (en) * 1990-07-04 1992-01-08 Airex AG Method of forming an article consisting of a foam core and one or more covering layers
US5374383A (en) * 1990-07-04 1994-12-20 Schreiner Luchtvaart Groep B.V. Method of forming an article consisting of a foam core and one or more covering layers
EP2402138A1 (en) * 2009-02-27 2012-01-04 Prime Polymer Co., Ltd. Injection foam molding method and apparatus therefor
EP2402138A4 (en) * 2009-02-27 2013-10-02 Prime Polymer Co Ltd Injection foam molding method and apparatus therefor

Also Published As

Publication number Publication date
DE1704544A1 (en) 1971-05-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees