GB935784A - Improvements in or relating to the extrusion of thermoplastic tubes - Google Patents

Improvements in or relating to the extrusion of thermoplastic tubes

Info

Publication number
GB935784A
GB935784A GB15312/61A GB1531261A GB935784A GB 935784 A GB935784 A GB 935784A GB 15312/61 A GB15312/61 A GB 15312/61A GB 1531261 A GB1531261 A GB 1531261A GB 935784 A GB935784 A GB 935784A
Authority
GB
United Kingdom
Prior art keywords
tube
extruded
core
rotated
length
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
GB15312/61A
Inventor
John Francis Edward Adams
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.)
Crown Packaging UK Ltd
Original Assignee
Metal Box PLC
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 Metal Box PLC filed Critical Metal Box PLC
Priority to GB15312/61A priority Critical patent/GB935784A/en
Publication of GB935784A publication Critical patent/GB935784A/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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • 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
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections

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

935,784. Extruding thermoplastic tubing for blow moulding bottles. METAL BOX CO. Ltd. Feb. 8, 1962 [April 27, 1961], No. 15312/61. Class 87(2). In a method of producing an extruded synthetic thermoplastic tube the material is extruded through a die 1 comprising an annular cover 4, a co-axial core 5 and means for rotating the core and cover relative to one another so that the weight per unit length of the tube is controlled by varying an induced unidirectional circumferential shearing action which determines the degree of contraction of the tube as it leaves the die. The external diameter of the tube may be varied by altering the speed at which the core 5 is rotated by a pinion 8 meshing with a toothed rack 9 reciprocated by a pneumatic piston and cylinder device 11, 10. When the extruded tube is used for the blow moulding of a bottle the core 5 is not rotated during the extrusion of the length 13, Fig. 2, which expands on leaving the orifice, but is rotated whilst the length 15 is extruded so that, due to the shearing action, the latter contracts to form the neck portion of the bottle.
GB15312/61A 1961-04-27 1961-04-27 Improvements in or relating to the extrusion of thermoplastic tubes Expired GB935784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15312/61A GB935784A (en) 1961-04-27 1961-04-27 Improvements in or relating to the extrusion of thermoplastic tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15312/61A GB935784A (en) 1961-04-27 1961-04-27 Improvements in or relating to the extrusion of thermoplastic tubes

Publications (1)

Publication Number Publication Date
GB935784A true GB935784A (en) 1963-09-04

Family

ID=10056858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15312/61A Expired GB935784A (en) 1961-04-27 1961-04-27 Improvements in or relating to the extrusion of thermoplastic tubes

Country Status (1)

Country Link
GB (1) GB935784A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261195A (en) * 1964-08-31 1966-07-19 Asea Ab Method for extruding pipe of metal or similar material
DE1289282B (en) * 1966-02-19 1969-02-13 Brumme Kg Effbe Werk Pressure expansion device for closed heating systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261195A (en) * 1964-08-31 1966-07-19 Asea Ab Method for extruding pipe of metal or similar material
DE1289282B (en) * 1966-02-19 1969-02-13 Brumme Kg Effbe Werk Pressure expansion device for closed heating systems

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