GB1316007A - Moulding foamed plastics - Google Patents

Moulding foamed plastics

Info

Publication number
GB1316007A
GB1316007A GB2776471A GB2776471A GB1316007A GB 1316007 A GB1316007 A GB 1316007A GB 2776471 A GB2776471 A GB 2776471A GB 2776471 A GB2776471 A GB 2776471A GB 1316007 A GB1316007 A GB 1316007A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
mould
foamed
blowing
cross
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
GB2776471A
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.)
Orica Ltd
Original Assignee
Orica 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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/26Moulds
    • B29C45/2669Moulds with means for removing excess material, e.g. with overflow cavities
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/36Feeding the material to be shaped
    • B29C44/38Feeding the material to be shaped into a closed space, i.e. to make articles of definite length
    • B29C44/42Feeding 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

Abstract

1316007 Injection moulding foamed articles ICI AUSTRALIA Ltd 14 June 1971 [12 June 1970] 27764/71 Heading B5A [Also in Division C3] In an injection mould for the production of small tyres from foamed ethylene/vinyl acetate copolymer, the parting surfaces of the mould parts 10, 11 adjacent the mould cavity are substantially parallel to the direction of opening of the mould, this being effected by use of a tapered portion 14 fitting into a recess 15-the mould is also provided with a relief recess 19 opening from the parting line 12 of the mould and connected with the mould cavity by runners 20; in use, the mould is maintained at a temperature above the crystalline melting-point of the thermoplastics and above the activation temperature of the blowing and cross-linking agents used, the molten thermoplastic/blowing agent/cross-linking agent mixture is injected through passages 17, 18 into the mould cavity, and the mould kept closed until the thermoplastic has been cross-linked and the blowing agent has been decomposed. The method may also be applied to polyethylene and ethylene/ ethyl acrylate copolymer.
GB2776471A 1970-06-12 1971-06-14 Moulding foamed plastics Expired GB1316007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AUPA149170 1970-06-12

Publications (1)

Publication Number Publication Date
GB1316007A true true GB1316007A (en) 1973-05-09

Family

ID=3764661

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2776471A Expired GB1316007A (en) 1970-06-12 1971-06-14 Moulding foamed plastics

Country Status (1)

Country Link
GB (1) GB1316007A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245522A (en) * 1990-06-26 1992-01-08 Spalding & Evenflo Golf ball injection mold
GB2286187A (en) * 1994-02-05 1995-08-09 Sundridge Tackle Limited Producing moulded rubber-like articles from foams based on ethylene vinyl acetate and another ethylene polymer
WO2012159126A1 (en) * 2011-05-13 2012-11-22 Dorasamy Ramchander Moulding method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245522A (en) * 1990-06-26 1992-01-08 Spalding & Evenflo Golf ball injection mold
GB2245522B (en) * 1990-06-26 1994-09-28 Spalding & Evenflo Golf ball injection mold
GB2286187A (en) * 1994-02-05 1995-08-09 Sundridge Tackle Limited Producing moulded rubber-like articles from foams based on ethylene vinyl acetate and another ethylene polymer
WO2012159126A1 (en) * 2011-05-13 2012-11-22 Dorasamy Ramchander Moulding method
CN103501987A (en) * 2011-05-13 2014-01-08 罗姆禅德·德诺萨米 Moulding method

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Legal Events

Date Code Title Description
PS Patent sealed
433D Application made for revocation (sect. 33/1949)
433A Case decided by the comptroller ** patent amended (sect. 33/1949)
PCNP Patent ceased through non-payment of renewal fee