GB1176813A - Hinged Articles. - Google Patents

Hinged Articles.

Info

Publication number
GB1176813A
GB1176813A GB2047068A GB2047068A GB1176813A GB 1176813 A GB1176813 A GB 1176813A GB 2047068 A GB2047068 A GB 2047068A GB 2047068 A GB2047068 A GB 2047068A GB 1176813 A GB1176813 A GB 1176813A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
hinge
foamed
polymer
mould
non
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
GB2047068A
Inventor
Maurice Henry Robin
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.)
Rolinx Ltd
Original Assignee
Rolinx 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
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336Coating a portion of the article, e.g. the edge of the article
    • 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
    • B29C44/02Shaping 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
    • B29C44/04Shaping 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
    • B29C44/0461Shaping 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
    • 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
    • B29C44/02Shaping 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
    • B29C44/08Shaping 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
    • B29C44/083Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
    • B29C44/086Increasing 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
    • 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
    • B29C45/0081Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of objects with parts connected by a thin section, e.g. hinge, tear line
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/22Hinges, pivots

Abstract

1,176,813. Moulding foamed articles with integral hinges. ROLINX Ltd. 16 July, 1968 [26 July, 1967; 30 April, 1968], Nos. 34400/67 and 20470/68. Heading B5A. [Also in Division B8] A hinged article comprising two foamed thermoplastic polymeric articles, each with an integral solid skin joined by an integral hinge of non-foamed material is made by injecting a composition containing a thermoplastic polymeric material and (at least in part) a blowing agent into a mould comprising a pair of opposed surfaces and a hinge defining component. The polymer temperature is above the activation temperature of the blowing agent, but the mould surface temperature is below, causing a non-foamed skin to form on the foamed members. Foaming is prevented at the hinge by the small spacing between the hinge defining component and the opposite wall. In the mould shown, the hinge is formed by heated member 5 which is pushed downwards into the position shown, destroying the foam structure. In a second embodiment, a non-foaming mixture is introduced into the mould to form the skin and hinge, the top of the mould 1 excluding the hinge defining member 5 is raised and a foaming polymer is injected into the preformed skin. In another embodiment, a preformed hinge of non-foamed polymer or textile fabric is clamped between the hinge defining member 5 and a projection from the base 2 with its ends extending into the moulding cavities and the foamed members are formed in the cavities and become integrally bonded to the hinge. The polymer may incorporate fillers or pigments such as glass or asbestos fibres or glass or mica plats and the polymer may be polypropylene, a polyamide, a polycarbonate, ABS, a polyacetal, a polyphenylene oxide, a polysulphone, PVC, polyethylene or polymethylmethacrylate. The process may be used to produce blanks for boxes or similar containers, the sides, base and top being foamed sheets with a non-foamed outer layer joined by moulded hinges with optional unfoamed tags (formed by the same method as the hinges) provided for joining the edges.
GB2047068A 1967-07-26 1967-07-26 Hinged Articles. Expired GB1176813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3440067 1967-07-26

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3767742A US3767742A (en) 1967-07-26 1970-11-30 Process of injection moulding a hinged article having foam cored members joined by an unfoamed hinge
US3825637A US3825637A (en) 1967-07-26 1971-05-03 Injection molding of foam cored sandwich structures

Publications (1)

Publication Number Publication Date
GB1176813A true true GB1176813A (en) 1970-01-07

Family

ID=10365184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2047068A Expired GB1176813A (en) 1967-07-26 1967-07-26 Hinged Articles.

Country Status (1)

Country Link
GB (1) GB1176813A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2186348A1 (en) * 1972-05-30 1974-01-11 Celpex Lay flat packages - made of a cellular resin with fold lines of locally crushed material in a single unit
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
WO2001000386A1 (en) * 1999-06-28 2001-01-04 Lear Corporation Method of forming a blow-molded plastic part having a living hinge
WO2003037599A1 (en) * 2001-11-01 2003-05-08 Dow Global Technologies Inc. Bendable polymeric foam with a reinforced slit
US6936321B2 (en) 2002-04-24 2005-08-30 Lear Corporation Blow molded article having an integrally molded living hinge and method of making the same
EP2159030A1 (en) * 2008-08-26 2010-03-03 Electrolux Home Products Corporation N.V. Injection molding method for producing plastic structural elements for household appliances

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2186348A1 (en) * 1972-05-30 1974-01-11 Celpex Lay flat packages - made of a cellular resin with fold lines of locally crushed material in a single unit
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
DE4106465A1 (en) * 1990-03-06 1991-09-12 Takata Corp A method of manufacturing a cover, in particular a modular or block-like cover, an air bag
FR2659267A1 (en) * 1990-03-06 1991-09-13 Takata Corp Method for producing a modular cover for an air balloon 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
WO2001000386A1 (en) * 1999-06-28 2001-01-04 Lear Corporation Method of forming a blow-molded plastic part having a living hinge
US6413348B2 (en) 1999-06-28 2002-07-02 Lear Corporation Method of forming a blow-molded plastic part having a living hinge
WO2003037599A1 (en) * 2001-11-01 2003-05-08 Dow Global Technologies Inc. Bendable polymeric foam with a reinforced slit
US6936321B2 (en) 2002-04-24 2005-08-30 Lear Corporation Blow molded article having an integrally molded living hinge and method of making the same
US7291307B2 (en) 2002-04-24 2007-11-06 International Automotive Components Group North America, Inc. Blow molded article having an integrally molded living hinge and method of making the same
EP2159030A1 (en) * 2008-08-26 2010-03-03 Electrolux Home Products Corporation N.V. Injection molding method for producing plastic structural elements for household appliances

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