GB805858A - 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
GB805858A
GB805858A GB216/56A GB21656A GB805858A GB 805858 A GB805858 A GB 805858A GB 216/56 A GB216/56 A GB 216/56A GB 21656 A GB21656 A GB 21656A GB 805858 A GB805858 A GB 805858A
Authority
GB
United Kingdom
Prior art keywords
tube
orifice
annular
cooling
thermoplastic material
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
GB216/56A
Inventor
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 GB216/56A priority Critical patent/GB805858A/en
Publication of GB805858A publication Critical patent/GB805858A/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
    • B29C48/901—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
    • 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
    • B29C48/88—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
    • B29C48/903—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 externally
    • 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
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally

Landscapes

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

Abstract

<PICT:0805858/IV (a)/1> <PICT:0805858/IV (a)/2> Apparatus for the extrusion of thermoplastic material in seamless tubular form comprises, as shown, a die having an annular orifice 12, means for extruding molten thermoplastic material through the orifice to form a seamless tube 11, means for withdrawing the tube continuously from the orifice and for maintaining a substantially constant bubble of a gaseous medium in the section of the tube adjacent to the orifice, and means for blowing a cooling gaseous medium in the form of a continuous annular converging stream completely encircling and simultaneously impinging on to the exterior surface of the tube, said means comprising an annular wind-box arranged symmetrically about the axis of the tube and having an upper and a lower diaphragm 21 and 22, the edges of which are in close proximity to the tube, and an intermediate diaphragm 23, the edge of which is spaced from the tube to form an annular aperture, for separating the wind-box into two sections 19, 20 and having a series of ports 26 in section 19 through which ports a cooling medium, e.g. air, supplied through pipe 24, is directed against the tube, the arrangement being such that the cooling medium is constrained to flow in a direction substantially parallel to the outer surface of the tube on its way to the outlet pipe 29. The cooling means is preferably mounted at least 4 inches from the extrusion die. The diaphragms are preferably adjustable, e.g. iris diaphragms. A number of suitable thermoplastic materials are specified. Specifications 654,550, 664,412 and 716,160 are referred to.
GB216/56A 1956-01-03 1956-01-03 Improvements in or relating to apparatus for the extrusion of thermoplastic material Expired GB805858A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB216/56A GB805858A (en) 1956-01-03 1956-01-03 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB216/56A GB805858A (en) 1956-01-03 1956-01-03 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Publications (1)

Publication Number Publication Date
GB805858A true GB805858A (en) 1958-12-17

Family

ID=9700469

Family Applications (1)

Application Number Title Priority Date Filing Date
GB216/56A Expired GB805858A (en) 1956-01-03 1956-01-03 Improvements in or relating to apparatus for the extrusion of thermoplastic material

Country Status (1)

Country Link
GB (1) GB805858A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121001A (en) * 1961-03-21 1964-02-11 Carmer Ind Inc Air bushing in plastics extrusion
US3167814A (en) * 1961-07-05 1965-02-02 Nat Distillers Chem Corp Apparatus for forming blown tubular films
DE1196850B (en) * 1962-10-12 1965-07-15 Basf Ag Process and device for the production of highly transparent foils from thermoplastics
US3210803A (en) * 1963-11-12 1965-10-12 Poly Plastic Products Inc Plastic tubing extrusion die air ring
US3456044A (en) * 1965-03-12 1969-07-15 Heinz Erich Pahlke Biaxial orientation
US4115047A (en) * 1976-09-07 1978-09-19 Stelmack Joseph J Apparatus for quenching blown films
CN106217822A (en) * 2016-08-02 2016-12-14 安徽国登管业科技有限公司 A kind of calibration sleeve of feed pipe extruder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3121001A (en) * 1961-03-21 1964-02-11 Carmer Ind Inc Air bushing in plastics extrusion
US3167814A (en) * 1961-07-05 1965-02-02 Nat Distillers Chem Corp Apparatus for forming blown tubular films
DE1196850B (en) * 1962-10-12 1965-07-15 Basf Ag Process and device for the production of highly transparent foils from thermoplastics
US3210803A (en) * 1963-11-12 1965-10-12 Poly Plastic Products Inc Plastic tubing extrusion die air ring
US3456044A (en) * 1965-03-12 1969-07-15 Heinz Erich Pahlke Biaxial orientation
US4115047A (en) * 1976-09-07 1978-09-19 Stelmack Joseph J Apparatus for quenching blown films
CN106217822A (en) * 2016-08-02 2016-12-14 安徽国登管业科技有限公司 A kind of calibration sleeve of feed pipe extruder

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