GB1168933A - Manufacture of Foamed Plastic Articles - Google Patents

Manufacture of Foamed Plastic Articles

Info

Publication number
GB1168933A
GB1168933A GB07006/68A GB1700668A GB1168933A GB 1168933 A GB1168933 A GB 1168933A GB 07006/68 A GB07006/68 A GB 07006/68A GB 1700668 A GB1700668 A GB 1700668A GB 1168933 A GB1168933 A GB 1168933A
Authority
GB
United Kingdom
Prior art keywords
polymer
cells
orifice
gas
extruder
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
GB07006/68A
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.)
FMC Corp
Original Assignee
FMC Corp
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 FMC Corp filed Critical FMC Corp
Publication of GB1168933A publication Critical patent/GB1168933A/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
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die

Landscapes

  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1,168,933. Extruding foamed resins. FMC CORP. 9 April, 1968 [31 May, 1967], No. 17006/68. Heading B5A. [Also in Division C3] A shaped foamed product formed of polymeric material having cells which are aligned is claimed and may be made by extruding a stream of flowable polymer through an elongated orifice as a shaped product, e.g. sheet, a gas being introduced under pressure into the stream at spaced intervals concomitantly with its passage through the extruder, permitting the gas to expand as the polymer issues from the orifice to provide a series of cells and setting the polymer. The polymer may be a polymer of ethylene, propylene, styrene or vinyl chloride, or viscose or cellulose acetate. Figs. 1-3 show an apparatus for making the foamed product wherein an extruder 11 has molten polymer in 13 which is fed via 15 through breaker plate 17 to orifice 33 while a gas under pressure is fed via a vertically adjustable aerating member 37 through perforations 51 which are aligned; on leaving 33 the molten polymer is under reduced pressure so that cells are formed, the foam is quenched, e.g. by cool air or liquid bath, and then may be stretched.
GB07006/68A 1967-05-31 1968-04-09 Manufacture of Foamed Plastic Articles Expired GB1168933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64237767A 1967-05-31 1967-05-31

Publications (1)

Publication Number Publication Date
GB1168933A true GB1168933A (en) 1969-10-29

Family

ID=24576298

Family Applications (1)

Application Number Title Priority Date Filing Date
GB07006/68A Expired GB1168933A (en) 1967-05-31 1968-04-09 Manufacture of Foamed Plastic Articles

Country Status (1)

Country Link
GB (1) GB1168933A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115491A (en) * 1975-07-25 1978-09-19 Robert Hanning Method of making thermoplastic articles with porous cores
US4474717A (en) * 1982-05-24 1984-10-02 Lang Fastener Corporation Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin
US4555225A (en) * 1982-05-24 1985-11-26 Lang Fastener Corporation Apparatus for making a twin-wall, internally corrugated plastic structural part with a smooth non-cellular skin

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4115491A (en) * 1975-07-25 1978-09-19 Robert Hanning Method of making thermoplastic articles with porous cores
US4474717A (en) * 1982-05-24 1984-10-02 Lang Fastener Corporation Method of making a twin-wall internally corrugated plastic structural part with a smooth non-cellular skin
US4555225A (en) * 1982-05-24 1985-11-26 Lang Fastener Corporation Apparatus for making a twin-wall, internally corrugated plastic structural part with a smooth non-cellular skin

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