GB938855A - Blow head for extruding tubular film - Google Patents

Blow head for extruding tubular film

Info

Publication number
GB938855A
GB938855A GB13772/62A GB1377262A GB938855A GB 938855 A GB938855 A GB 938855A GB 13772/62 A GB13772/62 A GB 13772/62A GB 1377262 A GB1377262 A GB 1377262A GB 938855 A GB938855 A GB 938855A
Authority
GB
United Kingdom
Prior art keywords
partition
section
channel
blow head
passage
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
GB13772/62A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB938855A publication Critical patent/GB938855A/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
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles

Landscapes

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

Abstract

As shown in Fig. 1, a blow head for extruding a tubular film comprises an inlet passage 1 which is of decreasing cross-section in the direction of flow, an annular spreader channel 5, a partition 16 arranged within channel 5 so as to cause overlapping of the two streams of film-forming material meeting at the partition, an annular passage which is formed by a fusto-conical mandrel 10 and a die ring 8 and is of decreasing cross-section in the direction of flow, a gas outlet pipe 11, and electric resistance heaters 13 and 14. Passage 1 contains a filter <PICT:0938855/IV(a)/1> 15. The cross-section of channel 5 may decrease (as shown) or increase in the direction of the partition. The partition may be straight (Fig. 6, not shown) or curved (Figs. 4 and 7, not shown). In an alternative embodiment (Fig. 8, not shown) for the production of large diameter tubular films, the mandrel is hollow and is heated internally by an electric resistance heater.
GB13772/62A 1961-04-14 1962-04-10 Blow head for extruding tubular film Expired GB938855A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM48704A DE1207069B (en) 1961-04-14 1961-04-14 Foil die head

Publications (1)

Publication Number Publication Date
GB938855A true GB938855A (en) 1963-10-09

Family

ID=7306306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13772/62A Expired GB938855A (en) 1961-04-14 1962-04-10 Blow head for extruding tubular film

Country Status (2)

Country Link
DE (1) DE1207069B (en)
GB (1) GB938855A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311952A (en) * 1965-07-16 1967-04-04 Modern Plastic Machinery Corp Extrusion die for blown film

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB853790A (en) * 1958-02-06 1960-11-09 Koppers Co Inc Improvements in or relating to a die for extruding organic thermoplastic material toform a tubular film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311952A (en) * 1965-07-16 1967-04-04 Modern Plastic Machinery Corp Extrusion die for blown film

Also Published As

Publication number Publication date
DE1207069B (en) 1965-12-16

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