GB904865A - A new or improved method of producing thin-walled tubes and tubular fibres of large diameter from synthetic plastic materials, and apparatus for performing the method - Google Patents

A new or improved method of producing thin-walled tubes and tubular fibres of large diameter from synthetic plastic materials, and apparatus for performing the method

Info

Publication number
GB904865A
GB904865A GB40543/58A GB4054358A GB904865A GB 904865 A GB904865 A GB 904865A GB 40543/58 A GB40543/58 A GB 40543/58A GB 4054358 A GB4054358 A GB 4054358A GB 904865 A GB904865 A GB 904865A
Authority
GB
United Kingdom
Prior art keywords
mandrel
tube
drawn
diameter
extrusion orifice
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
GB40543/58A
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
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 Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Publication of GB904865A publication Critical patent/GB904865A/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
    • B29C48/902—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 internally
    • 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
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

<PICT:0904865/IV(a)/1> <PICT:0904865/IV(a)/2> Tubular films are produced by extruding a synthetic organic thermo-plastic material 1 through an annular extrusion orifice 3 in the extrusion head 2 (Fig. 1) to form a tube 4 which is drawn over a hollow mandrel 5 through which cooling water is circulated by means of tubes 6 and 7. The portion of the tube 4 between the extrusion orifice and the mandrel is inflated by means of a gas at superatmospheric pressure introduced through the tube 9. The diameter of the tube is thus increased sufficiently to enable it to be drawn without undue friction over the mandrel 5 whose diameter is greater than that of the extrusion orifice. The tube 4, cooled by its passage over the mandrel, but not yet solidified and hardened, is drawn from the mandrel and may thereby be reduced in diameter and just before leaving the mandrel or after leaving the mandrel is cooled by water discharged from the annular hollow member 12 through uniformly spaced spraying nozzles 11. The position of the member 12 is axially adjustable with respect to the mandrel so that the final internal diameter of the completely solidified tube or tubular film is equal to or less than the external diameter of the mandrel. The tube 4 may be drawn through a second cooling device 13 (Fig. 2) concentric with the tube by means of a drawing-off device comprising a cylindrical core 15 connected rigidly to the mandrel 5 by a bar 16 and provided with four rows of rollers 17 co-operating with the four rubberized driven endless conveyer belts 19. Specification 691,125 is referred to.
GB40543/58A 1958-01-30 1958-12-16 A new or improved method of producing thin-walled tubes and tubular fibres of large diameter from synthetic plastic materials, and apparatus for performing the method Expired GB904865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0022584 1958-01-30

Publications (1)

Publication Number Publication Date
GB904865A true GB904865A (en) 1962-08-29

Family

ID=7401165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40543/58A Expired GB904865A (en) 1958-01-30 1958-12-16 A new or improved method of producing thin-walled tubes and tubular fibres of large diameter from synthetic plastic materials, and apparatus for performing the method

Country Status (2)

Country Link
CH (1) CH366968A (en)
GB (1) GB904865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114007804A (en) * 2019-07-19 2022-02-01 艾萨帕克控股公司 Friction-reducing drive device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114007804A (en) * 2019-07-19 2022-02-01 艾萨帕克控股公司 Friction-reducing drive device
CN114007804B (en) * 2019-07-19 2023-10-31 艾萨帕克控股公司 Friction-reducing drive device

Also Published As

Publication number Publication date
CH366968A (en) 1963-01-31

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