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GB1422325A - Extrusion processes - Google Patents

Extrusion processes

Info

Publication number
GB1422325A
GB1422325A GB266672A GB266672A GB1422325A GB 1422325 A GB1422325 A GB 1422325A GB 266672 A GB266672 A GB 266672A GB 266672 A GB266672 A GB 266672A GB 1422325 A GB1422325 A GB 1422325A
Authority
GB
United Kingdom
Prior art keywords
tube
discs
die
seal
sizing
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
GB266672A
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.)
BXL Plastics Ltd
Original Assignee
Bakelite Xylonite 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 Bakelite Xylonite Ltd filed Critical Bakelite Xylonite Ltd
Priority to GB266672A priority Critical patent/GB1422325A/en
Priority to CA161,390A priority patent/CA1011513A/en
Priority to SE7300654A priority patent/SE423611B/en
Priority to DE2302071A priority patent/DE2302071A1/en
Priority to FR7301696A priority patent/FR2168476B1/fr
Priority to AU51216/73A priority patent/AU457306B2/en
Priority to JP845673A priority patent/JPS5625372B2/ja
Priority to IT4780573A priority patent/IT976980B/en
Publication of GB1422325A publication Critical patent/GB1422325A/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
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Tubes (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

1422325 Sizing extruded tubes BAKELITE XYLONITE Ltd 12 Jan 1973 [19 Jan 1972] 2666/72 Headings B5A and B5B A circular or other section thermoplastics tube 1, is downwardly extruded from a die 2 and sized in being drawn, by nip rolls, around a plurality of spaced apart edges of a sizing member, during internal cooling by circulating liquid, e.g. deaerated water, admitted between the lower edge and a seal 5 and flowing upwardly through peripheral perforations through the member, to a level thereabove at which it is withdrawn and between which and the die 2 a supporting air pressure is maintained within the tube 1. The edges may be machined from a single block of material, but preferably are defined, Fig. 1, by discs spaced by smaller diameter baffle discs 4, between an upper one of which (27), Fig. 2 (not shown), and a lower nut, they are threadedly clamped to a tube 6 passing through the die. The supporting air is admitted at a controlled pressure, e.g. regulated by proximity sensitive devices, via a pipe 13, and is vented between the tube 6 and the die mandrel. The cooling water is admitted below the discs at openings 10, from between a tube 7 and a tube 11, and is withdrawn above the discs by suction, at openings 29, into a passage between the tube 6 and the tube 7. The extruding tube 1 is externally cooled by a liquid 3, against the pressure of which it is internally supported by a pressurized gas admitted below the seal 5, via a tube 11 and opening 12. The tubes 6-11 are supported to the die by spiders. The extruding tube 1 may comprise numerous specified thermoplastics. The sizing discs have bevelled edges, and the sizing and baffle discs may comprise stainless steel or brass, or filled or unfilled polytetrafluoroethylene or polychlorotrifluoroethylene. The seal 5 may comprise rubber, leather and rubber, and may include the means of Specification 1,106,994, or may comprise steel, and may comprise a plurality of, e.g. flexible and rigid, elements. Within the bath 3, cooling liquid may circulate through a sleeve surrounding the extruding tube 1. In the Fig. 3 embodiment, two seals 5 and 15 are provided, with any cooling liquid passing the seal being removed by suction applied at passages 16, 18. The examples relate to the extrusion of tubes of polypropylene of À050 inch wall thickness, and low density polyethylene of À010 inch wall thickness.
GB266672A 1972-01-19 1972-01-19 Extrusion processes Expired GB1422325A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB266672A GB1422325A (en) 1972-01-19 1972-01-19 Extrusion processes
CA161,390A CA1011513A (en) 1972-01-19 1973-01-16 Internally cooling an extruded tube
SE7300654A SE423611B (en) 1972-01-19 1973-01-17 PROCEDURE AND DEVICE FOR COOLING A STRUCTURED HOSE OF ORGANIC THERMOPLASTIC MATERIAL
DE2302071A DE2302071A1 (en) 1972-01-19 1973-01-17 METHOD AND DEVICE FOR THE INTERNAL COOLING OF EXTRUDED HOSES
FR7301696A FR2168476B1 (en) 1972-01-19 1973-01-18
AU51216/73A AU457306B2 (en) 1972-01-19 1973-01-18 Improvements in and relating to extrusion processes
JP845673A JPS5625372B2 (en) 1972-01-19 1973-01-19
IT4780573A IT976980B (en) 1972-01-19 1973-01-19 PROCEDURE AND APPARATUS FOR THE EXTRUSION OF PIPES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB266672A GB1422325A (en) 1972-01-19 1972-01-19 Extrusion processes

Publications (1)

Publication Number Publication Date
GB1422325A true GB1422325A (en) 1976-01-28

Family

ID=9743638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB266672A Expired GB1422325A (en) 1972-01-19 1972-01-19 Extrusion processes

Country Status (6)

Country Link
JP (1) JPS5625372B2 (en)
CA (1) CA1011513A (en)
DE (1) DE2302071A1 (en)
FR (1) FR2168476B1 (en)
GB (1) GB1422325A (en)
SE (1) SE423611B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911933A (en) * 1995-02-01 1999-06-15 Wavin B.V. Method for producing a thermoplastic tubular profile and internal cooling unit for such a method
EP1475215A1 (en) * 2002-02-01 2004-11-10 Kohjin Co., Ltd. Inner mandrel
EP1867460A2 (en) * 2006-06-16 2007-12-19 Wavin B.V. Corrugated plastic pipe production
CN103212910A (en) * 2012-01-19 2013-07-24 昆山思拓机器有限公司 Aerostatic chuck self-adaptive to tube diameters of tubes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008022A (en) * 1975-02-28 1977-02-15 General Electric Company Thermoplastic tube seal and cooling means
AT403584B (en) * 1993-09-13 1998-03-25 Chemiefaser Lenzing Ag METHOD AND DEVICE FOR PRODUCING CELLULOSIC FLAT OR TUBE FILMS
NL1001259C2 (en) 1995-05-03 1996-11-05 Wavin Bv Method for treating an extruded plastic profile and extrusion installation therefor.
JP4957956B2 (en) * 2006-10-26 2012-06-20 住友ベークライト株式会社 Porous material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB702176A (en) * 1951-08-09 1954-01-13 British Celanese The production of tubular articles
DE1262567B (en) * 1961-04-28 1968-03-07 Hoechst Ag Device for the extrusion of molten polymers in the form of a film tube
GB1106994A (en) * 1964-07-06 1968-03-20 Bakelite Xylonite Ltd Improvements in and relating to thermoplastic films

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911933A (en) * 1995-02-01 1999-06-15 Wavin B.V. Method for producing a thermoplastic tubular profile and internal cooling unit for such a method
EP1475215A1 (en) * 2002-02-01 2004-11-10 Kohjin Co., Ltd. Inner mandrel
EP1475215A4 (en) * 2002-02-01 2010-05-05 Kohjin Co INTERNAL CHUCK
EP1867460A2 (en) * 2006-06-16 2007-12-19 Wavin B.V. Corrugated plastic pipe production
EP1867460A3 (en) * 2006-06-16 2009-04-08 Wavin B.V. Corrugated plastic pipe production
CN103212910A (en) * 2012-01-19 2013-07-24 昆山思拓机器有限公司 Aerostatic chuck self-adaptive to tube diameters of tubes
CN103212910B (en) * 2012-01-19 2015-09-30 昆山思拓机器有限公司 A kind of gas-static chuck of self-adapting tube caliber

Also Published As

Publication number Publication date
AU5121673A (en) 1974-07-18
DE2302071A1 (en) 1973-07-26
FR2168476A1 (en) 1973-08-31
CA1011513A (en) 1977-06-07
FR2168476B1 (en) 1976-05-14
JPS4886667A (en) 1973-11-15
DE2302071C2 (en) 1988-02-11
SE423611B (en) 1982-05-17
JPS5625372B2 (en) 1981-06-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee