GB1194191A - Improvements in or relating to the Production of Microcellular Moulded Articles. - Google Patents

Improvements in or relating to the Production of Microcellular Moulded Articles.

Info

Publication number
GB1194191A
GB1194191A GB2114167A GB2114167A GB1194191A GB 1194191 A GB1194191 A GB 1194191A GB 2114167 A GB2114167 A GB 2114167A GB 2114167 A GB2114167 A GB 2114167A GB 1194191 A GB1194191 A GB 1194191A
Authority
GB
United Kingdom
Prior art keywords
mould
cores
core
moulding
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
GB2114167A
Inventor
William Bernard Sisson
Reginald Charles Ricketts
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.)
VINATEX Ltd
Original Assignee
VINATEX 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 VINATEX Ltd filed Critical VINATEX Ltd
Priority to GB2114167A priority Critical patent/GB1194191A/en
Publication of GB1194191A publication Critical patent/GB1194191A/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
    • B29C44/08—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 using several expanding or moulding steps
    • B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
    • B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged 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
    • 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
    • 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
    • B29C44/385—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using manifolds or channels directing the flow in the mould
    • B29C44/386—Feeding the material to be shaped into a closed space, i.e. to make articles of definite length using manifolds or channels directing the flow in the mould using a movable, elongate nozzle, e.g. to reach deep into the mould
    • 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
    • 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
    • B29C44/58—Moulds
    • B29C44/586—Moulds with a cavity increasing in size during foaming

Abstract

1,194,191. Moulding cellular articles. VINATEX Ltd. 6 May, 1968 [5 May, 1967], No. 21141/67. Heading B5A. Microcellular articles are moulded from natural or synthetic polymers by injecting a polymer composition containing a blowing agent into a cavity in a mould, and retracting one or more cores from the mould during or after injection; the injection temperature being above the decomposition temperature of the blowing agent. The cores are preferably of uniform cross-section in their direction of movement, fit closely in the holes in the mould wall and when fully retracted co-operate with the rest of the mould to define the shape of the article being moulded. They may be totally removed and the mould wall stopped by other objects. The cores preferably occupy at least 75% of the mould volume initially and the injection cylinder for the piston injector is preferably mounted in the core so that it is retractable with the core and the nozzle is positioned in the end of the core in the mould cavity. The moulding may be carried out in stages; injecting polymer, partly withdrawing one or more cores and repeating. One or more of the mould surfaces may be coated to assist the formation of a surface skin on the polymer moulding.
GB2114167A 1967-05-05 1967-05-05 Improvements in or relating to the Production of Microcellular Moulded Articles. Expired GB1194191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2114167A GB1194191A (en) 1967-05-05 1967-05-05 Improvements in or relating to the Production of Microcellular Moulded Articles.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2114167A GB1194191A (en) 1967-05-05 1967-05-05 Improvements in or relating to the Production of Microcellular Moulded Articles.

Publications (1)

Publication Number Publication Date
GB1194191A true GB1194191A (en) 1970-06-10

Family

ID=10157894

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2114167A Expired GB1194191A (en) 1967-05-05 1967-05-05 Improvements in or relating to the Production of Microcellular Moulded Articles.

Country Status (1)

Country Link
GB (1) GB1194191A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1974889A1 (en) * 2006-01-17 2008-10-01 Toyota Jidosha Kabushiki Kaisha Mold for molding and method for molding product
WO2012016755A1 (en) * 2010-08-02 2012-02-09 Robert Bosch Gmbh Process and device for producing an injection moulding
EP3246144A1 (en) * 2016-05-20 2017-11-22 Christian Karl Siebenwurst GmbH & Co. KG Modellbau & Formenbau Method and device for injection stamping of a plastic part
WO2024049936A1 (en) * 2022-08-31 2024-03-07 Dow Global Technologies Llc Method for making molded polymer foam

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1974889A1 (en) * 2006-01-17 2008-10-01 Toyota Jidosha Kabushiki Kaisha Mold for molding and method for molding product
EP1974889A4 (en) * 2006-01-17 2014-09-10 Toyota Motor Co Ltd Mold for molding and method for molding product
WO2012016755A1 (en) * 2010-08-02 2012-02-09 Robert Bosch Gmbh Process and device for producing an injection moulding
CN103118851A (en) * 2010-08-02 2013-05-22 罗伯特·博世有限公司 Process and device for producing an injection moulding
EP3246144A1 (en) * 2016-05-20 2017-11-22 Christian Karl Siebenwurst GmbH & Co. KG Modellbau & Formenbau Method and device for injection stamping of a plastic part
WO2024049936A1 (en) * 2022-08-31 2024-03-07 Dow Global Technologies Llc Method for making molded polymer foam

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Legal Events

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