GB1372074A - Method and device for regulating the wall thickness of products manufactured from synthetic materials - Google Patents

Method and device for regulating the wall thickness of products manufactured from synthetic materials

Info

Publication number
GB1372074A
GB1372074A GB4625571A GB4625571A GB1372074A GB 1372074 A GB1372074 A GB 1372074A GB 4625571 A GB4625571 A GB 4625571A GB 4625571 A GB4625571 A GB 4625571A GB 1372074 A GB1372074 A GB 1372074A
Authority
GB
United Kingdom
Prior art keywords
wall thickness
extruded
tube
die
channels
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
GB4625571A
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.)
Industriele Onderneming Wavin NV
Original Assignee
Industriele Onderneming Wavin NV
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 Industriele Onderneming Wavin NV filed Critical Industriele Onderneming Wavin NV
Publication of GB1372074A publication Critical patent/GB1372074A/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
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
    • B29C48/83—Heating or cooling the cylinders
    • B29C48/832—Heating
    • 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
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92638—Length
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92657—Volume or quantity
    • 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

Abstract

1372074 Controlling extruded tube wall thickness INDUSTRIELLE ONDERNEMING WAVIN NV 5 Oct 1971 [5 Oct 1970] 46255/71 Heading B5A [Also in Division G3] The wall thickness of an extruded polyvinyl extruded material tube 16, being extruded from a single or twin screw extruder 3, is automatically controlled to a desired value by differential heating and cooling of the heat plasticized material flowing through the die, effected by control means responsive to deviations from a predetermined wall thickness sensed by feelers 8a to 8d downstream of the die. The wall thickness of the tube may be maintained constant along its length, may be varied to produce different wall thickness along the length, e.g., and the tube may then be increased in diameter where of greater extruded wall thickness to produce a constant wall thickness, or the extruded mass may be circumferentially regulated to extrude a curved tube of circumferentially uniform wall thickness. The differential heating may be effected by electrical resistance heaters, but in the described embodiment the die 7 and/ or mandrel 6 comprises circumferentially extending sectors 7a to 7e each having adjacent channels 9, 10, respectively, for the circulation of hot oil at temperatures respectively below, e.g. at 150‹ C., and above, e.g. at 190‹ C., the temperature, e.g. 180‹. C., of the polyvinyl chloride being extruded, which is measured by sensors 12a to 12e, the oil being circulated through channels 9 and 10, respectively, to decrease and increase the extruded tube wall thickness. The feelers 8a-8d act via an electric operating member to control the liquid circulation in the channels, and the sensors 12a to 12e act, via a regulator, to signal an oil heating device. The extruded tube is drawn by constant speed rollers 13a, 13b, through a vacuum sizing die 14, and a water cooling spray 15.
GB4625571A 1970-10-05 1971-10-05 Method and device for regulating the wall thickness of products manufactured from synthetic materials Expired GB1372074A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7014565A NL7014565A (en) 1970-10-05 1970-10-05

Publications (1)

Publication Number Publication Date
GB1372074A true GB1372074A (en) 1974-10-30

Family

ID=19811224

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4625571A Expired GB1372074A (en) 1970-10-05 1971-10-05 Method and device for regulating the wall thickness of products manufactured from synthetic materials

Country Status (2)

Country Link
GB (1) GB1372074A (en)
NL (1) NL7014565A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319480A1 (en) * 1975-07-28 1977-02-25 Standard Oil Co IMPROVEMENTS FOR PLASTIC EXTRUSION INDUSTRY HEADS
EP0047839A2 (en) * 1980-08-28 1982-03-24 Gebr. Happich GmbH Method of producing an extruded plastics profiled edging, and an apparatus for carrying out said method
EP0153511A1 (en) * 1983-12-27 1985-09-04 Wavin B.V. Method and apparatus for extruding a plastic pipe with controlled wall thickness
EP0180571A2 (en) * 1984-09-11 1986-05-07 Erwin Hartl Extrusion die arrangement and automatic centering extrusion method
US4882104A (en) * 1987-04-03 1989-11-21 Cincinnati Milacron, Inc. Method of controlling the thickness of an extruded plastic article
NL8902778A (en) * 1988-11-18 1990-06-18 Cincinnati Milacron Austria METHOD FOR MANUFACTURING TUBES AND PROFILES FROM THERMOPLASTIC PLASTIC MASSES
EP0390696A2 (en) * 1989-03-30 1990-10-03 Tomi Machinery Manfuacturing Co., Ltd. Apparatus for controlling thickness of film formed by melt extrusion
NL1018450C2 (en) * 2001-07-03 2003-01-08 Machf De Rollepaal B V Device for extruding a thermoplastic polymer into a tube, and a nozzle therefor.
CN112643995A (en) * 2019-10-09 2021-04-13 戴维斯-标准有限公司 Polymer pipe forming device with multi-dimensional control system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1444757A (en) * 1972-08-15 1976-08-04 Du Pont Process and apparatus for preparing polymeric film
CN115157606A (en) * 2022-06-20 2022-10-11 日丰新材有限公司 Automatic pipeline production line

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2319480A1 (en) * 1975-07-28 1977-02-25 Standard Oil Co IMPROVEMENTS FOR PLASTIC EXTRUSION INDUSTRY HEADS
EP0047839A2 (en) * 1980-08-28 1982-03-24 Gebr. Happich GmbH Method of producing an extruded plastics profiled edging, and an apparatus for carrying out said method
EP0047839A3 (en) * 1980-08-28 1984-05-02 Gebr. Happich GmbH Method of producing an extruded plastics profiled edging, and an apparatus for carrying out said method
EP0153511A1 (en) * 1983-12-27 1985-09-04 Wavin B.V. Method and apparatus for extruding a plastic pipe with controlled wall thickness
EP0180571A2 (en) * 1984-09-11 1986-05-07 Erwin Hartl Extrusion die arrangement and automatic centering extrusion method
EP0180571A3 (en) * 1984-09-11 1986-11-26 Erwin Hartl Extrusion die arrangement and automatic centering extrusion method
US4882104A (en) * 1987-04-03 1989-11-21 Cincinnati Milacron, Inc. Method of controlling the thickness of an extruded plastic article
NL8902778A (en) * 1988-11-18 1990-06-18 Cincinnati Milacron Austria METHOD FOR MANUFACTURING TUBES AND PROFILES FROM THERMOPLASTIC PLASTIC MASSES
EP0390696A2 (en) * 1989-03-30 1990-10-03 Tomi Machinery Manfuacturing Co., Ltd. Apparatus for controlling thickness of film formed by melt extrusion
EP0390696A3 (en) * 1989-03-30 1991-04-17 Tomi Machinery Manfuacturing Co., Ltd. Apparatus for controlling thickness of film formed by melt extrusion
NL1018450C2 (en) * 2001-07-03 2003-01-08 Machf De Rollepaal B V Device for extruding a thermoplastic polymer into a tube, and a nozzle therefor.
WO2003004247A1 (en) * 2001-07-03 2003-01-16 Machinefabriek 'de Rollepaal' B.V. Device for extruding a thermoplastic polymer into a tube, and an extruder head therefor
CN112643995A (en) * 2019-10-09 2021-04-13 戴维斯-标准有限公司 Polymer pipe forming device with multi-dimensional control system

Also Published As

Publication number Publication date
NL7014565A (en) 1972-04-07

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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