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GB1281723A - Injection moulding of laminar articles - Google Patents

Injection moulding of laminar articles

Info

Publication number
GB1281723A
GB1281723A GB4529569A GB4529569A GB1281723A GB 1281723 A GB1281723 A GB 1281723A GB 4529569 A GB4529569 A GB 4529569A GB 4529569 A GB4529569 A GB 4529569A GB 1281723 A GB1281723 A GB 1281723A
Authority
GB
United Kingdom
Prior art keywords
article
injection moulding
skin
sept
moulded
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
GB4529569A
Inventor
Paul Johnson Garner
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
Priority to BE756186D priority Critical patent/BE756186A/en
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB4529569A priority patent/GB1281723A/en
Priority to NL7013391A priority patent/NL7013391A/xx
Priority to FR7033223A priority patent/FR2061375A5/fr
Priority to DE19702045362 priority patent/DE2045362B2/en
Priority to JP45080594A priority patent/JPS5019140B1/ja
Publication of GB1281723A publication Critical patent/GB1281723A/en
Priority to US324004A priority patent/US3865915A/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
    • B29C44/0461—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
    • B29C44/02—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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • 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

Landscapes

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

Abstract

1281723 Injection moulding IMPERIAL CHEMICAL INDUSTRIES Ltd 1 Sept 1970 [15 Sept 1969] 45295/69 Heading B5A In a process for injection moulding by sequentially injecting two dissimilar synthetic resins to form an article having a core enclosed by a skin, a cavity defining the shape of the article to be moulded is provided with at least one extension into which excess skin material is forced by injection of the core material. The excess material is removed from the article during or after moulding, e.g. by means of cutting knives movably mounted in the mould. The invention enables uniform thickness of skin material to be produced even in corners and edges of the article. The core material may be foamed. The moulded article may be a panel or interior trim for a motor car and may incorporate an insert, e.g. a sheet of plywood, hardboard, metal or plastics. The mould surface may be textured or coated with a heat resistant material, e.g. silicon rubber.
GB4529569A 1969-09-15 1969-09-15 Injection moulding of laminar articles Expired GB1281723A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BE756186D BE756186A (en) 1969-09-15 INJECTION MOLDING OF COMPLICATED LAMINATE OBJECTS
GB4529569A GB1281723A (en) 1969-09-15 1969-09-15 Injection moulding of laminar articles
NL7013391A NL7013391A (en) 1969-09-15 1970-09-10
FR7033223A FR2061375A5 (en) 1969-09-15 1970-09-14
DE19702045362 DE2045362B2 (en) 1969-09-15 1970-09-14 Method for producing injection-molded articles with a skin and a core made of plastic material and an injection mold for carrying out the method
JP45080594A JPS5019140B1 (en) 1969-09-15 1970-09-16
US324004A US3865915A (en) 1969-09-15 1973-01-15 Injection moulding of complex shaped laminar articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4529569A GB1281723A (en) 1969-09-15 1969-09-15 Injection moulding of laminar articles

Publications (1)

Publication Number Publication Date
GB1281723A true GB1281723A (en) 1972-07-12

Family

ID=10436664

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4529569A Expired GB1281723A (en) 1969-09-15 1969-09-15 Injection moulding of laminar articles

Country Status (6)

Country Link
JP (1) JPS5019140B1 (en)
BE (1) BE756186A (en)
DE (1) DE2045362B2 (en)
FR (1) FR2061375A5 (en)
GB (1) GB1281723A (en)
NL (1) NL7013391A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438062A (en) 1983-04-14 1984-03-20 The General Tire & Rubber Company In-mold coating method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2257408B1 (en) * 1973-09-25 1978-01-13 Billion Sa
JPS5434943U (en) * 1977-07-14 1979-03-07
FR2530181A1 (en) * 1982-07-16 1984-01-20 Essilor Int METHOD AND DEVICE FOR MOLDING AN OPTICAL MEMBER IN SYNTHETIC MATERIAL
ATE180433T1 (en) * 1993-11-05 1999-06-15 Battenfeld Gmbh METHOD AND DEVICE FOR INJECTION MOLDING MULTI-LAYER OBJECTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4438062A (en) 1983-04-14 1984-03-20 The General Tire & Rubber Company In-mold coating method

Also Published As

Publication number Publication date
NL7013391A (en) 1971-03-17
DE2045362B2 (en) 1974-01-17
JPS5019140B1 (en) 1975-07-04
DE2045362A1 (en) 1971-03-25
BE756186A (en) 1971-03-15
FR2061375A5 (en) 1971-06-18

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee