GB1314873A - Extrusion of plastics materials - Google Patents

Extrusion of plastics materials

Info

Publication number
GB1314873A
GB1314873A GB1741770A GB1741770A GB1314873A GB 1314873 A GB1314873 A GB 1314873A GB 1741770 A GB1741770 A GB 1741770A GB 1741770 A GB1741770 A GB 1741770A GB 1314873 A GB1314873 A GB 1314873A
Authority
GB
United Kingdom
Prior art keywords
extrusion
polymethylmethacrylate
april
mixed
die head
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
GB1741770A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
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 Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of GB1314873A publication Critical patent/GB1314873A/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/581—Devices for influencing the material flow, e.g. "torpedo constructions" or mixing devices
    • 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
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/362—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using static mixing devices
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

1314873 Homogenizing apparatus MONTECATINI EDISON SpA 13 April 1970 [18 April 1969] 17417/70 Heading B1C [Also in Division B5] Plastics materials are homogenised during extrusion by passage, between the extrusion screw and die head, through a static homogenizing device comprising sets of intersecting channels 2, 4 of semi-cylindrical section helical threads of opposite band, and respectively provided in a sleeve 1 and a closely fitting torpedo 4 fastened together by a spider 5, and located by pins (not shown) and spacers 7, 8, within a casing 6 fastened between a vented barrel 9 and die head 10 by tie bolts 11 which facilitate disassembly. The device may be heated, and the use is described, with extruders of down to a screw length diameter ratio of 15:1, in the extrusion of "U" sections, sheets, tubes; and multiple square section strands which are granulated, using materials comprising; mixed polymethylmethacrylate and polyvinyl chloride granules, optionally with ABS powder; mixed polymethylmethacrylate granules of different fluidity index. Air and water cooling of the extrudate is referred to.
GB1741770A 1969-04-18 1970-04-13 Extrusion of plastics materials Expired GB1314873A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1574069 1969-04-18

Publications (1)

Publication Number Publication Date
GB1314873A true GB1314873A (en) 1973-04-26

Family

ID=11148196

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1741770A Expired GB1314873A (en) 1969-04-18 1970-04-13 Extrusion of plastics materials

Country Status (7)

Country Link
BE (1) BE749106A (en)
DE (2) DE7013580U (en)
ES (1) ES378738A1 (en)
FR (1) FR2043279A5 (en)
GB (1) GB1314873A (en)
NL (1) NL7005165A (en)
YU (1) YU33901B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988004228A1 (en) * 1986-12-06 1988-06-16 Prosyma Research Limited Fibre reinforced polymer compositions and process and apparatus for production thereof
WO1990008025A1 (en) * 1989-01-19 1990-07-26 Polysystem International Inc. Blown-film extrusion die
US20170008214A1 (en) * 2014-02-19 2017-01-12 Redetec Inc. Apparatus for extruding plastic materials

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173446A (en) * 1977-07-21 1979-11-06 Phillips Petroleum Company Choke ring for pipe extrusion die
JPH0637725B2 (en) * 1985-01-19 1994-05-18 工業技術院長 Carbon fiber manufacturing method
DE3827772A1 (en) * 1988-08-16 1990-02-22 Thomas Paul Engel DEVICE AND METHOD FOR MOLDING SEMI-FINISHED PRODUCTS FROM HIGH MOLECULAR PLASTICS
JP3016231U (en) * 1994-05-31 1995-09-26 モートン インターナショナル，インコーポレイティド Die insert and die device of extrusion molding machine for gas generant particles
AT5617U1 (en) 2001-09-17 2002-09-25 Technoplast Kunststofftechnik ADAPTER FOR AN EXTRUDER
CA2443483C (en) 2002-10-02 2011-08-16 Mold-Masters Limited Mixing device
DE102004009320A1 (en) 2003-02-26 2004-11-18 Mold-Masters Ltd., Georgetown Hot runner system for controlling cross-sectional asymmetric condition of laminar flowing material comprises flow rotator having bending path for orienting outlet relative to inlet to divide equally the condition between two downstreams
US7614872B2 (en) * 2005-10-04 2009-11-10 Mold-Masters (2007) Limited Melt redistribution element for an injection molding apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988004228A1 (en) * 1986-12-06 1988-06-16 Prosyma Research Limited Fibre reinforced polymer compositions and process and apparatus for production thereof
WO1990008025A1 (en) * 1989-01-19 1990-07-26 Polysystem International Inc. Blown-film extrusion die
US20170008214A1 (en) * 2014-02-19 2017-01-12 Redetec Inc. Apparatus for extruding plastic materials
US10744697B2 (en) 2014-02-19 2020-08-18 Redetec Inc. Apparatus for extruding plastic materials

Also Published As

Publication number Publication date
BE749106A (en) 1970-10-19
YU33901B (en) 1978-06-30
NL7005165A (en) 1970-10-20
ES378738A1 (en) 1973-02-01
DE7013580U (en) 1970-07-16
FR2043279A5 (en) 1971-02-12
DE2017710A1 (en) 1970-10-22
YU100270A (en) 1977-12-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees