GB1384061A - Process for the production of laminar mouldings - Google Patents

Process for the production of laminar mouldings

Info

Publication number
GB1384061A
GB1384061A GB2876871A GB2876871A GB1384061A GB 1384061 A GB1384061 A GB 1384061A GB 2876871 A GB2876871 A GB 2876871A GB 2876871 A GB2876871 A GB 2876871A GB 1384061 A GB1384061 A GB 1384061A
Authority
GB
United Kingdom
Prior art keywords
mould
charge
injection
inlets
foaming agent
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
GB2876871A
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
Priority to GB2876871A priority Critical patent/GB1384061A/en
Priority to DE19722229871 priority patent/DE2229871A1/en
Publication of GB1384061A publication Critical patent/GB1384061A/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
    • 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
    • B29C45/1635—Making multilayered or multicoloured articles using displaceable mould parts, e.g. retractable partition between adjacent mould cavities
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

Abstract

1384061 Moulding laminated polyurethane articles IMPERIAL CHEMICAL INDUSTRIES Ltd 14 June 1972 [18 June 1971] 28768/71 Heading B5A Laminated polyurethane articles are made by injecting a first charge of polyurethane reaction mixture into a mould to fill the mould (by allowing it to expand if a foaming agent is used), letting the first charge harden and then injecting a second charge into the mould whilst permitting the volume of the mould cavity to be increased by the pressure of injection to accommodate the second charge. A vertical flash mould, Fig. 1, comprising an hydraulically operated plunger 3 and a mould shell 2 has two mixing chambers 4, 5 supplied with polyisocyanate through inlets 7 and 10 and with polyol through inlets 6 and 11. Foaming agent is incorporated into the polyol supplied to the first charge in chamber 4, and after injection a plunger 8 is moved until its face 9 lies flush with the mould surface to completely empty chamber 4 and close the inlets 6 and 7. A second charge is injected through chamber 5. To enable a singleinjection nozzle to be used the two charges may be identical and contain foaming agent, a higher injection pressure being used for the second injection to present foaming and also to displace the mould plunger against its hydraulic pressure. Examples of polyurethane reaction mixtures and curing conditions for producing a rigid layer supporting a rigid foam for refrigerator housings or a flexible foam for car trims are given.
GB2876871A 1971-06-18 1971-06-18 Process for the production of laminar mouldings Expired GB1384061A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2876871A GB1384061A (en) 1971-06-18 1971-06-18 Process for the production of laminar mouldings
DE19722229871 DE2229871A1 (en) 1971-06-18 1972-06-19 Process for the production of multi-layer molded pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2876871A GB1384061A (en) 1971-06-18 1971-06-18 Process for the production of laminar mouldings

Publications (1)

Publication Number Publication Date
GB1384061A true GB1384061A (en) 1975-02-19

Family

ID=10280843

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2876871A Expired GB1384061A (en) 1971-06-18 1971-06-18 Process for the production of laminar mouldings

Country Status (2)

Country Link
DE (1) DE2229871A1 (en)
GB (1) GB1384061A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348037A1 (en) * 1976-04-12 1977-11-10 Demag Kunststofftech Composite article prodn. from two or more synthetic materials - using one in reactive state and second as melt at the surface of contact, avoiding use of adhesive
FR2720043A1 (en) * 1994-05-21 1995-11-24 Petri Ag Covering piece for airbag impact protection devices, and method of manufacturing the same.
EP1177880A1 (en) * 2000-08-03 2002-02-06 Recticel Reaction injection moulding process for the production of a polyurethane skin layer
WO2006050961A1 (en) * 2004-11-11 2006-05-18 Carcoustics Techconsult Gmbh Light-weight sound-absorbing covering for a body part of a motor vehicle and method for producing the same
GB2433719A (en) * 2005-12-28 2007-07-04 Nihon Plast Co Ltd Insert moulded foamed and non-foamed layers
ITRM20080685A1 (en) * 2008-12-19 2010-06-20 Adler Evo S R L "VEHICLE MOLDING MOLDING METHOD"

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938082C2 (en) * 1989-11-16 1996-02-01 Bayerische Motoren Werke Ag Manufacturing process for a padded equipment part for vehicles
EP0665092A1 (en) * 1993-12-30 1995-08-02 SCHLAADT PLASTICS GmbH Apparatus for making moulded objects of foam
DE19716718A1 (en) * 1997-04-21 1998-10-22 Bayerische Motoren Werke Ag Multi=layer vehicle interior furnishing component manufacture

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2348037A1 (en) * 1976-04-12 1977-11-10 Demag Kunststofftech Composite article prodn. from two or more synthetic materials - using one in reactive state and second as melt at the surface of contact, avoiding use of adhesive
FR2720043A1 (en) * 1994-05-21 1995-11-24 Petri Ag Covering piece for airbag impact protection devices, and method of manufacturing the same.
EP1177880A1 (en) * 2000-08-03 2002-02-06 Recticel Reaction injection moulding process for the production of a polyurethane skin layer
WO2002011974A1 (en) * 2000-08-03 2002-02-14 Recticel Process for the production of a layer part, in particular a reaction injection moulding process for the production of a polyurethane skin layer
US6998085B2 (en) 2000-08-03 2006-02-14 Recticel Process for the production of a layer part, in particular a reaction injection moulding process for the production of a polyurethane skin layer
WO2006050961A1 (en) * 2004-11-11 2006-05-18 Carcoustics Techconsult Gmbh Light-weight sound-absorbing covering for a body part of a motor vehicle and method for producing the same
GB2433719A (en) * 2005-12-28 2007-07-04 Nihon Plast Co Ltd Insert moulded foamed and non-foamed layers
GB2433719B (en) * 2005-12-28 2010-07-14 Nihon Plast Co Ltd Mold goods and insert molding method
ITRM20080685A1 (en) * 2008-12-19 2010-06-20 Adler Evo S R L "VEHICLE MOLDING MOLDING METHOD"

Also Published As

Publication number Publication date
DE2229871A1 (en) 1972-12-21

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Legal Events

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