[go: up one dir, main page]

GB1226129A - - Google Patents

Info

Publication number
GB1226129A
GB1226129A GB1226129DA GB1226129A GB 1226129 A GB1226129 A GB 1226129A GB 1226129D A GB1226129D A GB 1226129DA GB 1226129 A GB1226129 A GB 1226129A
Authority
GB
United Kingdom
Prior art keywords
cavity
injection
aug
pressure
under pressure
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 GB1226129A publication Critical patent/GB1226129A/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
    • B29C44/04—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0407—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 consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the temperature of the mould or parts thereof, e.g. cold mould walls inhibiting foaming of an outer layer
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

1,226,129. Injection moulding. CHEMISCHE WERKE HULS A.G. 9 Aug., 1968 [12 Aug., 1968], No. 38187/68. Heading B5A. Foamed plastics articles are produced by injecting at high pressure a thermoplastic plastics composition with an expanding agent into a mould cavity to fill it completely, hardening the surface of the moulding whilst it is under pressure, removing this pressure by withdrawing some of the material from the cavity interior, and expanding the material remaining. The material may be allowed to flow out of the cavity during the expansion, or it may be withdrawn by suction. Prior to the injection step the cavity may contain a gas or liquid under pressure, which may be heated and which escapes during the injection.
GB1226129D 1967-08-12 1968-08-09 Expired GB1226129A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEC0043100 1967-08-12

Publications (1)

Publication Number Publication Date
GB1226129A true GB1226129A (en) 1971-03-24

Family

ID=7025225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1226129D Expired GB1226129A (en) 1967-08-12 1968-08-09

Country Status (3)

Country Link
DE (1) DE1704545A1 (en)
FR (1) FR1576083A (en)
GB (1) GB1226129A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG18242A1 (en) * 1972-09-25 1974-10-25
FR2433407A1 (en) * 1978-08-14 1980-03-14 Asahi Dow Ltd Injection moulded thermoplastic foam component - having lower density at its core, produced in pressurised mould having delayed injection pressure
FR2602996B1 (en) * 1986-08-19 1989-02-17 Jaeger METHOD FOR MANUFACTURING A LOW-DENSITY MOLDED PART AND A PART THUS PRODUCED, IN PARTICULAR A FLOAT FOR A MOTOR VEHICLE HYDROCARBON CIRCUIT
DE102006039099B4 (en) * 2006-08-02 2008-07-17 MöllerTech GmbH Injection molding process for producing a foamed component
DE102019215841A1 (en) * 2019-10-15 2021-04-15 Joyson Safety Systems Germany Gmbh Airbag cover with partially foamed areas and method for producing such airbag covers

Also Published As

Publication number Publication date
FR1576083A (en) 1969-07-25
DE1704545A1 (en) 1971-05-19

Similar Documents

Publication Publication Date Title
MX166392B (en) PROCESS TO MOLD BY INJECTION AND ARTICLE OF PLASTIC HOLLOW, PRODUCED BY THE SAME
FR2125300A1 (en) Plastic shoe heels - with compressed gas blown into the centre of the plastic mould mass
ES459748A1 (en) Process for the molding of plastic structural web and the resulting articles
ES295489A1 (en) Molding process
GB1226129A (en)
GB1263344A (en) Method of and apparatus for producing plastics mouldings
GB1305224A (en)
GB1339445A (en) Production of laminar articles
GB1226135A (en)
GB1328872A (en) Method of forming a thermoplastic article
JPS54106569A (en) Injection molding of resin product having insert
JPS55291A (en) Production of form product
GB1267389A (en) Method of making essentially seamless foamed plastic bodies
JPS54111557A (en) Hollow molded article having integrated internal ribs, and method for forming the same
GB1333587A (en) Injection moulding synthetic plastics articles
GB962580A (en) Method of making an article from thermoplastic material
JPS5476658A (en) Molding of synthetic resin article
GB1177793A (en) Injecting Thermoplastic Material
GB1292318A (en) Improvements in or relating to the moulding of articles of a cellular thermoplastic material
FR2076587A5 (en) Demoulding by air injection - through the punch in moulds without taper
JPS5591642A (en) Holding device for inserted body at enclosing molder
GB1180833A (en) A Method for Producing a Moulded Article, in Particular a Shoe Sole.
ES377540A1 (en) Injection moulding apparatus with dynamic impact injection assist means and control therefor
GB1194191A (en) Improvements in or relating to the Production of Microcellular Moulded Articles.
JPS5597940A (en) Molding method of and apparatus for linked molding

Legal Events

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