GB854478A - Improvements in or relating to the production of porous bodies of thermoplastic material - Google Patents

Improvements in or relating to the production of porous bodies of thermoplastic material

Info

Publication number
GB854478A
GB854478A GB3395/57A GB339557A GB854478A GB 854478 A GB854478 A GB 854478A GB 3395/57 A GB3395/57 A GB 3395/57A GB 339557 A GB339557 A GB 339557A GB 854478 A GB854478 A GB 854478A
Authority
GB
United Kingdom
Prior art keywords
belts
channel
granules
cooling
heating zone
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
GB3395/57A
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.)
W M B Internat A B
Original Assignee
W M B Internat A B
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 W M B Internat A B filed Critical W M B Internat A B
Publication of GB854478A publication Critical patent/GB854478A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/24—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by surface fusion and bonding of particles to form voids, e.g. sintering
    • 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
    • B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
    • B29C44/206—Using expandable particles or beads as starting material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

854,478. Moulding expanded thermoplastic materials. WMB INTERNATIONAL A.B. Jan. 31, 1957 [Feb. 3, 1956], No. 3395/57. Class 87(2). Pre-expanded granules of a synthetic thermoplastic material, e.g. polystyrene, are formed into coherent bodies by feeding them by means of a series of parallel screw conveyers 71 from a hopper 70 into one end of an elongated channel 56 of which at least two of the walls are formed by driven endless belts 20, 22, the belts being perforated to enable heated gas to be injected through the granules in a heating zone of the channel whereby the granules expand further and become pressed together to form a coherent body and themselves counteract motion in a direction opposite to the direction of feed, finally gradually cooling the coherent body. The heating zone comprises boxes 78 into which steam supply tubes 80 open and the cooling zone boxes 82, a cooling agent, e.g. air being introduced into one end through socket 84 and escaping through socket 86. The length of the cooling zone considerably exceeds that of the heating zone. The belts 20, 22 are backed by rollers 46. The side walls of the channel 56 may also be formed by endless belts, which may be as long as or shorter than the belts 20, 22. The tension of the belts may be adjusted by moving the drums 12, 16 by pneumatic devices such as 50 and the belt 20 may be raised or lowered to vary the depth of the channel 56. Specification 854,467 is referred to.
GB3395/57A 1956-02-03 1957-01-31 Improvements in or relating to the production of porous bodies of thermoplastic material Expired GB854478A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE854478X 1956-02-03

Publications (1)

Publication Number Publication Date
GB854478A true GB854478A (en) 1960-11-16

Family

ID=20362767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3395/57A Expired GB854478A (en) 1956-02-03 1957-01-31 Improvements in or relating to the production of porous bodies of thermoplastic material

Country Status (5)

Country Link
BE (1) BE573360Q (en)
DE (1) DE1160604B (en)
FR (1) FR1165798A (en)
GB (1) GB854478A (en)
NL (2) NL214224A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140739A (en) * 1983-05-31 1984-12-05 Allen Ind Method and apparatus for making a sheet of material
EP2431148A1 (en) * 2010-09-17 2012-03-21 Technisch Bureel Panigo N.V. Production of laminated styrene-polymerised sheets
BE1020212A5 (en) * 2010-09-17 2013-06-04 Tech Bureel Panigo Nv PRODUCTION OF LAYERED STYRENE POLYMERIZED PLATES.

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178768A (en) * 1958-07-31 1965-04-20 Koppers Co Inc Apparatus for making foamed polymeric structures
US3065500A (en) * 1958-12-11 1962-11-27 Wmb Internat A B Method and apparatus for making coherent bodies from expandable granules of thermoplastic
US3142864A (en) * 1959-10-27 1964-08-04 Tru Scale Inc Means and method for the formation of paneling having a foamed plastic core
US3111709A (en) * 1960-05-20 1963-11-26 Tru Scale Inc Feed mechanism
US3137743A (en) * 1960-11-03 1964-06-16 Tru Scale Inc Method of forming foamed structures
DE1279325B (en) * 1961-01-26 1968-10-03 Wmb Internat Ab Process for continuously producing blocks from porous thermoplastic material
US3335207A (en) * 1963-10-11 1967-08-08 Owens Illinois Inc Method and apparatus for forming foamed low density sheet plastic
NL124748C (en) * 1964-10-07
US3422178A (en) * 1965-10-12 1969-01-14 Monsanto Co Continuous polymer casting machine and process
SE370206B (en) * 1973-02-02 1974-10-07 Gullfiber Ab

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE866846C (en) * 1936-12-18 1953-02-12 Int Latex Processes Ltd Method and device for the production of spongy or cellular rubber goods
DE859122C (en) * 1943-08-28 1952-12-11 Degussa Continuous production of porous moldings
GB588617A (en) * 1944-08-30 1947-05-29 British Insulated Cables Ltd Improvements in apparatus for producing cellular material
DE842267C (en) * 1950-12-20 1952-09-15 Rolf Moroni Method and device for the continuous production of endless plates, webs or foils from foamable materials, in particular those based on polyurethane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140739A (en) * 1983-05-31 1984-12-05 Allen Ind Method and apparatus for making a sheet of material
EP2431148A1 (en) * 2010-09-17 2012-03-21 Technisch Bureel Panigo N.V. Production of laminated styrene-polymerised sheets
BE1020212A5 (en) * 2010-09-17 2013-06-04 Tech Bureel Panigo Nv PRODUCTION OF LAYERED STYRENE POLYMERIZED PLATES.

Also Published As

Publication number Publication date
NL214224A (en)
FR1165798A (en) 1958-10-29
DE1160604B (en) 1964-01-02
BE573360Q (en) 1959-03-16
NL102124C (en)

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