GB862941A - Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor - Google Patents

Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor

Info

Publication number
GB862941A
GB862941A GB43791/59A GB4379159A GB862941A GB 862941 A GB862941 A GB 862941A GB 43791/59 A GB43791/59 A GB 43791/59A GB 4379159 A GB4379159 A GB 4379159A GB 862941 A GB862941 A GB 862941A
Authority
GB
United Kingdom
Prior art keywords
mandrel
die
shell
orifice
flow path
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
GB43791/59A
Inventor
Bastiaan Groos
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.)
Shell Research Ltd
Original Assignee
Shell Research 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 Shell Research Ltd filed Critical Shell Research Ltd
Priority to GB43791/59A priority Critical patent/GB862941A/en
Publication of GB862941A publication Critical patent/GB862941A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

862,941. Extruding tubes. SHELL RESEARCH Ltd. Dec. 23, 1959, No. 43791/59. Class 87(2). A process of moulding tubes from, e.g. polyethylene or p.v.c. comprises extruding the material through an orifice 8 composed of a mandrel 4 and a die 7 which are arranged so that the material flows away from the mandrel support 2 towards the orifice 8 and follows a sinuous path which over a major portion of its length is substantially parallel to the longitudinal axis of the die. Fig. 1 shows a die head where the material flows between a barrel 3 and shell 5, through an annular semi-circular channel 11, between shells 5, 6, through a second channel 12 and finally between the shell 5 and mandrel 4. The total length of the flow path may be three times the distance from the support 2 to the die 7 and the mean radius of the channels 11, 12 be about one tengh of the lengths of the adjacent straight portions. The mandrel 4 may be heated. Fig. 4 (not shown), shows an apparatus where the flow path turns outwardly away from the mandrel to extrude a tube of larger size than the inlet to the apparatus.
GB43791/59A 1959-12-23 1959-12-23 Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor Expired GB862941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB43791/59A GB862941A (en) 1959-12-23 1959-12-23 Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43791/59A GB862941A (en) 1959-12-23 1959-12-23 Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor

Publications (1)

Publication Number Publication Date
GB862941A true GB862941A (en) 1961-03-15

Family

ID=10430324

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43791/59A Expired GB862941A (en) 1959-12-23 1959-12-23 Improvements in or relating to the extrusion of thermoplastic material and apparatustherefor

Country Status (1)

Country Link
GB (1) GB862941A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090994A (en) * 1961-03-20 1963-05-28 Owens Illinois Glass Co Plastic forming machine orifice structure
US3226766A (en) * 1962-02-16 1966-01-04 Fischer Ag Georg Plasticizing and conveying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3090994A (en) * 1961-03-20 1963-05-28 Owens Illinois Glass Co Plastic forming machine orifice structure
US3226766A (en) * 1962-02-16 1966-01-04 Fischer Ag Georg Plasticizing and conveying device

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