GB714194A - Improvements in or relating to apparatus for the extrusion of thermoplastic material - Google Patents

Improvements in or relating to apparatus for the extrusion of thermoplastic material

Info

Publication number
GB714194A
GB714194A GB5406/52A GB540652A GB714194A GB 714194 A GB714194 A GB 714194A GB 5406/52 A GB5406/52 A GB 5406/52A GB 540652 A GB540652 A GB 540652A GB 714194 A GB714194 A GB 714194A
Authority
GB
United Kingdom
Prior art keywords
orifice
tube
extrusion
temperature
conduit
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
GB5406/52A
Inventor
William Berry
Richard Arthur Rose
John Alfred Victor White
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.)
British Cellophane Ltd
Original Assignee
British Cellophane 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 British Cellophane Ltd filed Critical British Cellophane Ltd
Priority to GB5406/52A priority Critical patent/GB714194A/en
Publication of GB714194A publication Critical patent/GB714194A/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
    • B29C48/78—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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/78—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
    • B29C48/865—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
    • B29C48/03—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
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles

Abstract

<PICT:0714194/IV (a)/1> To increase the uniformity of wall thickness of extruded thin-walled tubes or sheets the extrusion orifice is provided with a plurality of spaced pockets adjacent thereto, each having means for independently regulating the temperature by heating or cooling the pocket and hence portions of the orifice adjacent thereto. As shown, a heated die 7 has a throughway 17 co-operating with a conical pin 6 to form a circular annular extrusion orifice 16, cooling fluid is circulated in spaced pockets 1, each of 1/8 to 1/2 inch diameter, via pipe 2 and conduit 3 and is controlled by a needle valve 10. The needle valves may be individually adjusted to control locally the temperature round the orifice and hence the thickness of the extruded tube. A hollow mandrel whose temperature is adjusted to be lower than that of the extruded tube and having a diameter between 1.1 and 6 times that of the extrusion orifice may be mounted at such a distance from the orifice that the tube is partly congealed on reaching it. Air may be supplied through conduit 14 to extend the tube.
GB5406/52A 1952-02-29 1952-02-29 Improvements in or relating to apparatus for the extrusion of thermoplastic material Expired GB714194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5406/52A GB714194A (en) 1952-02-29 1952-02-29 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5406/52A GB714194A (en) 1952-02-29 1952-02-29 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Publications (1)

Publication Number Publication Date
GB714194A true GB714194A (en) 1954-08-25

Family

ID=9795569

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5406/52A Expired GB714194A (en) 1952-02-29 1952-02-29 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Country Status (1)

Country Link
GB (1) GB714194A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126594B (en) * 1958-02-06 1962-03-29 Koppers Co Inc Mold for extrusion of inflatable tubular films
US3029474A (en) * 1957-07-09 1962-04-17 Lonza Electric & Chem Works Process and apparatus for the extrusion of thermoplastic material
DE1181394B (en) * 1956-07-11 1964-11-12 Dow Chemical Co Method and apparatus for producing uniformly molecularly oriented polystyrene films
DE1183667B (en) * 1957-07-09 1964-12-17 Lonza Ag Process for the production of smooth hoses, in particular film hoses, made of thermoplastic material, and an injection head on a heated extruder for carrying out the process
US3311681A (en) * 1960-10-28 1967-03-28 American Can Co Method of extruding a foamed plastic sheet having a skin on one surface
JPS4945964A (en) * 1972-08-15 1974-05-02
DE2658518A1 (en) * 1976-12-23 1978-06-29 Reifenhaeuser Kg Automatic thickness control of blown thermoplastic tubing - by air jets playing on parts showing deviation from nominal value
FR2485433A1 (en) * 1980-04-18 1981-12-31 Windmoeller & Hoelscher METHOD FOR CONTROLLING THE THICKNESS OF TUBULAR SHEETS MANUFACTURED IN AN EXTRUSION-BLOWING INSTALLATION

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1181394B (en) * 1956-07-11 1964-11-12 Dow Chemical Co Method and apparatus for producing uniformly molecularly oriented polystyrene films
US3029474A (en) * 1957-07-09 1962-04-17 Lonza Electric & Chem Works Process and apparatus for the extrusion of thermoplastic material
DE1183667B (en) * 1957-07-09 1964-12-17 Lonza Ag Process for the production of smooth hoses, in particular film hoses, made of thermoplastic material, and an injection head on a heated extruder for carrying out the process
DE1126594B (en) * 1958-02-06 1962-03-29 Koppers Co Inc Mold for extrusion of inflatable tubular films
US3311681A (en) * 1960-10-28 1967-03-28 American Can Co Method of extruding a foamed plastic sheet having a skin on one surface
JPS4945964A (en) * 1972-08-15 1974-05-02
JPS563171B2 (en) * 1972-08-15 1981-01-23
DE2658518A1 (en) * 1976-12-23 1978-06-29 Reifenhaeuser Kg Automatic thickness control of blown thermoplastic tubing - by air jets playing on parts showing deviation from nominal value
FR2485433A1 (en) * 1980-04-18 1981-12-31 Windmoeller & Hoelscher METHOD FOR CONTROLLING THE THICKNESS OF TUBULAR SHEETS MANUFACTURED IN AN EXTRUSION-BLOWING INSTALLATION

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