GB1314452A - Injection moulding - Google Patents

Injection moulding

Info

Publication number
GB1314452A
GB1314452A GB2185670A GB1314452DA GB1314452A GB 1314452 A GB1314452 A GB 1314452A GB 2185670 A GB2185670 A GB 2185670A GB 1314452D A GB1314452D A GB 1314452DA GB 1314452 A GB1314452 A GB 1314452A
Authority
GB
United Kingdom
Prior art keywords
foamable
opposed
tool members
tool
layers
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
GB2185670A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Publication of GB1314452A publication Critical patent/GB1314452A/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
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/5675—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding for making orifices in or through the moulded article
    • 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
    • B29C44/0446—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 increasing the density locally by compressing part of the foam while still in 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
    • B29C44/02—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
    • B29C44/0461—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 having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
    • 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
    • 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

Abstract

1314452 Injection moulding cellular articles IMPERIAL CHEMICAL INDUSTRIES Ltd 3 May 1971 [6 May 1970] 21856/70 Addition to 1176813 Heading B5A In a method of making an injection moulded article having a foam core 10 sandwiched between non-foamed surface skins 11 and an area of unfoamed material 17 surrounded by the foamed core sandwich, after filling the mould cavity but before the material has set, a tool 14 (Fig. 6) is forced against the surface of the non- foamable material so as to compress and fuse together opposed portions of the non-foamable layers thereby forcing the foamable plastics material from between the opposed layers. The compressed portion may be sufficiently thin to be removed after the article is removed from the mould. In Figs. 1 to 3 (not shown), there may be two opposed tool members (7, 8) moved towards one another. Fig. 7 shows a further modification in which the tool members 7, 8 are ring-shaped. The ends of the tool members may be chamfered.
GB2185670A 1970-05-06 1970-05-06 Injection moulding Expired GB1314452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2185670 1970-05-06

Publications (1)

Publication Number Publication Date
GB1314452A true GB1314452A (en) 1973-04-26

Family

ID=10169981

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2185670A Expired GB1314452A (en) 1970-05-06 1970-05-06 Injection moulding

Country Status (1)

Country Link
GB (1) GB1314452A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006270A1 (en) * 1978-06-13 1980-01-09 Stamicarbon B.V. Method and apparatus for the manufacture of objects from thermoplastic structural foam
FR2543056A1 (en) * 1983-03-25 1984-09-28 Schwarzenberg Waschgeraete Injection mouldings mfr.
GB2139549A (en) * 1983-05-11 1984-11-14 James Watson Hendry Injection moulding
GB2241663A (en) * 1990-03-06 1991-09-11 Takata Corp Moulding a vehicle air bag cover, incorporating a tear line groove for air bag release
DE102007060863B4 (en) * 2007-12-18 2014-10-02 Kraussmaffei Technologies Gmbh Process for the production of multi-component plastic corks
EP2641716A3 (en) * 2012-03-21 2017-12-06 Faurecia Interior Systems, Inc. Molding in airbag door features in a vehicle interior panel using a movable mold member
EP3180181A4 (en) * 2014-08-12 2018-08-08 ICEE Holdings Pty Limited System and method for creating a fold in a portion of expandable material
CN115157529A (en) * 2022-07-25 2022-10-11 泉州市本源康健鞋材科技有限公司 Processing equipment and process for EVA material of sole

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0006270A1 (en) * 1978-06-13 1980-01-09 Stamicarbon B.V. Method and apparatus for the manufacture of objects from thermoplastic structural foam
FR2543056A1 (en) * 1983-03-25 1984-09-28 Schwarzenberg Waschgeraete Injection mouldings mfr.
GB2139549A (en) * 1983-05-11 1984-11-14 James Watson Hendry Injection moulding
GB2241663A (en) * 1990-03-06 1991-09-11 Takata Corp Moulding a vehicle air bag cover, incorporating a tear line groove for air bag release
FR2659267A1 (en) * 1990-03-06 1991-09-13 Takata Corp METHOD FOR MANUFACTURING A MODULAR COVER FOR INFLATABLE BALLOON FOR PROTECTION AGAINST COLLISIONS.
US5149479A (en) * 1990-03-06 1992-09-22 Takata Corporation Method of manufacturing modular cover of air bag
GB2241663B (en) * 1990-03-06 1993-09-22 Takata Corp Method of manufacturing modular cover of air bag
DE102007060863B4 (en) * 2007-12-18 2014-10-02 Kraussmaffei Technologies Gmbh Process for the production of multi-component plastic corks
EP2641716A3 (en) * 2012-03-21 2017-12-06 Faurecia Interior Systems, Inc. Molding in airbag door features in a vehicle interior panel using a movable mold member
EP3180181A4 (en) * 2014-08-12 2018-08-08 ICEE Holdings Pty Limited System and method for creating a fold in a portion of expandable material
CN115157529A (en) * 2022-07-25 2022-10-11 泉州市本源康健鞋材科技有限公司 Processing equipment and process for EVA material of sole

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years