GB1382274A - Moulding of articles of foam material - Google Patents

Moulding of articles of foam material

Info

Publication number
GB1382274A
GB1382274A GB411972A GB411972A GB1382274A GB 1382274 A GB1382274 A GB 1382274A GB 411972 A GB411972 A GB 411972A GB 411972 A GB411972 A GB 411972A GB 1382274 A GB1382274 A GB 1382274A
Authority
GB
United Kingdom
Prior art keywords
moulding
temperature
mixture
mould cavity
cavity
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
GB411972A
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.)
Noxet UK Ltd
Original Assignee
British United Shoe Machinery Ltd
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 by British United Shoe Machinery Ltd filed Critical British United Shoe Machinery Ltd
Publication of GB1382274A publication Critical patent/GB1382274A/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
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • B29C45/50—Axially movable screw
    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/38—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum
    • B29C44/422—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using pressure difference, e.g. by injection or by vacuum by injecting by forward movement of the plastizising screw

Abstract

1382274 Injection moulding cellular articles BRITISH UNITED SHOE MACHINERY CO Ltd 28 Jan 1972 [22 Jan 1971] 4119/72 Heading B5A A method of moulding an article of foam material comprises (a) mixing a moulding material and a blowing agent at a temperature below the foaming temperature, (b) injecting the mixture into a mould cavity and simultaneously increasing the temperature of the mixture at least to the foaming temperature, at a rate sufficient to fill the mould before the development of blowing gas, the surfaces of the mould cavity being at a temperature sufficient to cool the mixture adjacent thereto be below the foaming temperature but not to the solidification temperature of the moulding material, and (c) expanding the mould cavity and subsequently cooling the moulding mixture. The mould cavity may be expanded at a rate independent of the pressure in the cavity, exapnsion being commenced upon or immediately preceding termination of injection. Apparatus for carrying out the method is as described in Specification 1,292,318.
GB411972A 1971-01-29 1972-01-28 Moulding of articles of foam material Expired GB1382274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP322371A JPS5428426B1 (en) 1971-01-29 1971-01-29

Publications (1)

Publication Number Publication Date
GB1382274A true GB1382274A (en) 1975-01-29

Family

ID=11551429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB411972A Expired GB1382274A (en) 1971-01-29 1972-01-28 Moulding of articles of foam material

Country Status (20)

Country Link
JP (1) JPS5428426B1 (en)
AT (1) AT342290B (en)
BE (1) BE778748A (en)
CA (1) CA977114A (en)
CH (1) CH533001A (en)
CS (1) CS166042B2 (en)
DE (1) DE2204157B2 (en)
DK (1) DK142608B (en)
ES (1) ES399703A1 (en)
FI (1) FI56641C (en)
FR (1) FR2123540B1 (en)
GB (1) GB1382274A (en)
HU (1) HU167065B (en)
IL (1) IL38667A (en)
IS (1) IS2054A7 (en)
IT (1) IT947068B (en)
NL (1) NL172131C (en)
NO (1) NO138281C (en)
PL (1) PL84475B1 (en)
SE (1) SE8103741L (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216061A (en) * 1988-02-19 1989-10-04 Triumph Adler Ag Differentially cooled mould for foam injection

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384691A (en) * 1965-09-10 1968-05-21 Allied Chem Method for molding a structure having a foamed plastic core substantially enclosed within an essentially unfoamed plastic layer
CH471671A (en) * 1967-06-09 1969-04-30 United Shoe Machinery Corp Method and device for injection molding objects made of foam
DE1950406C3 (en) * 1968-10-15 1981-12-03 USM Corp., 06032 Farmington, Conn. Process for the injection molding of objects from a mixture of a foamable plastic and a temperature-sensitive blowing agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2216061A (en) * 1988-02-19 1989-10-04 Triumph Adler Ag Differentially cooled mould for foam injection
GB2216061B (en) * 1988-02-19 1991-12-11 Triumph Adler Ag Method of producing a plastics platen for typewriters or other imprinting machines

Also Published As

Publication number Publication date
DK142608B (en) 1980-12-01
DE2204157C3 (en) 1989-02-23
ATA68972A (en) 1977-07-15
FI56641C (en) 1980-03-10
FI56641B (en) 1979-11-30
IL38667A (en) 1975-05-22
DE2204157A1 (en) 1972-08-10
FR2123540A1 (en) 1972-09-08
BE778748A (en) 1972-05-16
NL172131B (en) 1983-02-16
IL38667A0 (en) 1972-03-28
IS2054A7 (en) 1972-02-16
SE8103741L (en) 1981-06-15
CH533001A (en) 1973-01-31
CA977114A (en) 1975-11-04
FR2123540B1 (en) 1975-10-24
NL172131C (en) 1983-07-18
PL84475B1 (en) 1976-04-30
CS166042B2 (en) 1976-01-29
IT947068B (en) 1973-05-21
NL7201213A (en) 1972-08-01
DE2204157B2 (en) 1981-02-26
DK142608C (en) 1981-08-03
HU167065B (en) 1975-07-28
AT342290B (en) 1978-03-28
JPS5428426B1 (en) 1979-09-17
NO138281B (en) 1978-05-02
NO138281C (en) 1978-08-09
ES399703A1 (en) 1974-12-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee