GB2020224A - A Rotary Extrusion Head for the Production of Tubular Plastics Films - Google Patents

A Rotary Extrusion Head for the Production of Tubular Plastics Films

Info

Publication number
GB2020224A
GB2020224A GB7915373A GB7915373A GB2020224A GB 2020224 A GB2020224 A GB 2020224A GB 7915373 A GB7915373 A GB 7915373A GB 7915373 A GB7915373 A GB 7915373A GB 2020224 A GB2020224 A GB 2020224A
Authority
GB
United Kingdom
Prior art keywords
port
annular groove
supply
ducts
production
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.)
Granted
Application number
GB7915373A
Other versions
GB2020224B (en
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.)
LOOSER G
Original Assignee
LOOSER G
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 LOOSER G filed Critical LOOSER G
Publication of GB2020224A publication Critical patent/GB2020224A/en
Application granted granted Critical
Publication of GB2020224B publication Critical patent/GB2020224B/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
    • 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)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The head comprises a rotatingly driven part 12 which is supported in a stationary part 10. Delivery ducts 38 in the port 12 supply molten plastics material to an annular die passage 22 and are fed with the molten plastics from an annular groove 30 in the stationary port 10, which is open towards the rotating part 12 and around which material is disposed delivered from a supply duct 34 flows in a single direction corresponding to that of the rotating part 12. Air ducts 44, 48 for the supply and return of cooling air are provided for cooling the tubular film 60 and extend through the rotating part 12 and the stationary part 10. The required flow direction around the annular groove 30 can be effected by a constriction 56 on one side of the supply duct 34, and towards which the groove 30 is of a decreasing cross-section. The ducts 38 may open into an annular groove in the port 12. <IMAGE>
GB7915373A 1978-05-03 1979-05-03 Rotary extrusin head for the production of tubular plastics film Expired GB2020224B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH480578A CH627685A5 (en) 1978-05-03 1978-05-03 FILM BLOW HEAD FOR THE PRODUCTION OF TUBE FILMS FROM PLASTIC.

Publications (2)

Publication Number Publication Date
GB2020224A true GB2020224A (en) 1979-11-14
GB2020224B GB2020224B (en) 1983-01-06

Family

ID=4282850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7915373A Expired GB2020224B (en) 1978-05-03 1979-05-03 Rotary extrusin head for the production of tubular plastics film

Country Status (3)

Country Link
CH (1) CH627685A5 (en)
DE (1) DE2917768A1 (en)
GB (1) GB2020224B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532582A1 (en) * 1982-09-02 1984-03-09 Warnke Umformtech Veb K ROTATING TOOL FOR BLOWING FILMS WITH A CENTRAL SUPPLY OF MOLTEN MATERIAL AND INTERNAL COOLING OF THE FILM

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE435598B (en) * 1983-04-12 1984-10-08 Dziewanowski Andre PROCEDURE AND DEVICE FOR MANUFACTURING EXTRUDED Pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2532582A1 (en) * 1982-09-02 1984-03-09 Warnke Umformtech Veb K ROTATING TOOL FOR BLOWING FILMS WITH A CENTRAL SUPPLY OF MOLTEN MATERIAL AND INTERNAL COOLING OF THE FILM

Also Published As

Publication number Publication date
CH627685A5 (en) 1982-01-29
DE2917768A1 (en) 1979-11-15
GB2020224B (en) 1983-01-06

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee