GB1243285A - Extrusion of resins - Google Patents

Extrusion of resins

Info

Publication number
GB1243285A
GB1243285A GB2412/69A GB241269A GB1243285A GB 1243285 A GB1243285 A GB 1243285A GB 2412/69 A GB2412/69 A GB 2412/69A GB 241269 A GB241269 A GB 241269A GB 1243285 A GB1243285 A GB 1243285A
Authority
GB
United Kingdom
Prior art keywords
channels
cooled
screw
tubes
pieces
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
GB2412/69A
Inventor
Stanley John Skinner
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.)
Monsanto Chemicals Ltd
Original Assignee
Monsanto Chemicals 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 Monsanto Chemicals Ltd filed Critical Monsanto Chemicals Ltd
Priority to GB2412/69A priority Critical patent/GB1243285A/en
Publication of GB1243285A publication Critical patent/GB1243285A/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
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1,243,285. Cooling expandable materials during extrusion. MONSANTO CHEMICALS Ltd. 9 Dec., 1969 [15 Jan., 1969], No. 2412/69. Heading B5A. [Also in Division B1] Screw-extruded polystyrene, expanded by 8% by weight of methyl chloride, is cooled between the end of the screw and the die by passage through a plurality of cylindrical channels, e.g. 17, 18, cooled by a fluid, e.g. stream, and the product of the length and perimeter of each whereof is at least 50 times its area of crosssection, and with the total area of all the channels being at least half the cross-sectional area of the extruder barrel enclosing the screw. The channels may comprise holes drilled through a block of aluminium, steel, copper, or brass which is cooled by a surrounding fluid, but in the preferred embodiment the channels comprise tubes 17, 18 of these materials fixed between end-pieces 19, 20 which are strengthened by a central thicker walled tube 21 and located within a body 1 by body pieces 5 and 7, respectively, fixing to the extruder barrel and die. The location with the body piece 7 is sealed with an annealed copper gasket 14, and with the body piece 5 provision is made by a clearance 24 for the differential expansion of the tubes, with sealing effected by surrounding rings 22 and 23 of cast iron and polytetrafluoroethylene. The end pieces 19, 20 are supported against the compressive effect of extrusion pressure by a pair of bridging semi-cylindrical exterior shells 2, 3, through which the cooling fluid passes at 15 and 16 to circulate around the exterior of the tubes 17, 18.
GB2412/69A 1969-01-15 1969-01-15 Extrusion of resins Expired GB1243285A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2412/69A GB1243285A (en) 1969-01-15 1969-01-15 Extrusion of resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2412/69A GB1243285A (en) 1969-01-15 1969-01-15 Extrusion of resins

Publications (1)

Publication Number Publication Date
GB1243285A true GB1243285A (en) 1971-08-18

Family

ID=9739108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2412/69A Expired GB1243285A (en) 1969-01-15 1969-01-15 Extrusion of resins

Country Status (1)

Country Link
GB (1) GB1243285A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2418074A1 (en) * 1978-02-23 1979-09-21 Lavorazione Mat Plast SCREW EXTRUDER FOR THERMOPLASTIC SYNTHETIC FOAMS
US4244903A (en) * 1976-10-22 1981-01-13 Rolf Schnause Manufacture of flowable composite particulate material
CN117863438A (en) * 2024-03-12 2024-04-12 安徽安大中鼎橡胶技术开发有限公司 Rubber flame retardant material foaming machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244903A (en) * 1976-10-22 1981-01-13 Rolf Schnause Manufacture of flowable composite particulate material
FR2418074A1 (en) * 1978-02-23 1979-09-21 Lavorazione Mat Plast SCREW EXTRUDER FOR THERMOPLASTIC SYNTHETIC FOAMS
CN117863438A (en) * 2024-03-12 2024-04-12 安徽安大中鼎橡胶技术开发有限公司 Rubber flame retardant material foaming machine
CN117863438B (en) * 2024-03-12 2024-05-31 安徽安大中鼎橡胶技术开发有限公司 Rubber flame retardant material foaming machine

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