GB755983A - Improvements in and relating to the production of film - Google Patents

Improvements in and relating to the production of film

Info

Publication number
GB755983A
GB755983A GB3592/54A GB359254A GB755983A GB 755983 A GB755983 A GB 755983A GB 3592/54 A GB3592/54 A GB 3592/54A GB 359254 A GB359254 A GB 359254A GB 755983 A GB755983 A GB 755983A
Authority
GB
United Kingdom
Prior art keywords
die
annular
plane
tubular film
round
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
GB3592/54A
Inventor
Richard Harold Barclay Buteux
Johnson Ralph Cann
Jack Witherington Cornforth
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB3592/54A priority Critical patent/GB755983A/en
Priority to ES0219776A priority patent/ES219776A1/en
Publication of GB755983A publication Critical patent/GB755983A/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

Tubular film of a synthetic organic thermoplastic material is extruded through the peripheral orifice of an annular extrusion channel formed between the plane horizontal surface of an annular die and an opposed parallel die plate, which plate has no projections beyond the plane of its extrusion surface. The die plate is preferably detachably mounted on a core positioned within the annular die. As shown, the peripheral orifice 7 is defined by the horizontal end surface 2 of the annular die 1, and the horizontal surface 5 of die plate 4 which is secured to the core 3 with the interposition of a resilient ring 12. Material to be extruded is fed through the connection 13 into the annular space between the die 1 and core 3. The construction facilitates maintenance of a specified gap round the whole of the peripheral orifice, particularly after re-grinding or re-polishing the extrusion surfaces, since the surfaces concerned are plane. Any slight variations in the gap may be compensated by providing a slightly flexible lip 21 round the die 1, whose position may be varied by adjusting a series of bolts 22 extending round the periphery. Inflating air may be introduced through the axial bore 14. The tubular film is preferably cooled by flowing a cooling liquid over its exterior as it passes downwardly through a suitable passageway. Examples describe the production of tubular film from polyethylene terephthalate and polythene. Specification 741,963 is referred to.
GB3592/54A 1954-02-08 1954-02-08 Improvements in and relating to the production of film Expired GB755983A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3592/54A GB755983A (en) 1954-02-08 1954-02-08 Improvements in and relating to the production of film
ES0219776A ES219776A1 (en) 1954-02-08 1955-01-27 Improvements in and relating to the production of film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3592/54A GB755983A (en) 1954-02-08 1954-02-08 Improvements in and relating to the production of film

Publications (1)

Publication Number Publication Date
GB755983A true GB755983A (en) 1956-08-29

Family

ID=9761247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3592/54A Expired GB755983A (en) 1954-02-08 1954-02-08 Improvements in and relating to the production of film

Country Status (2)

Country Link
ES (1) ES219776A1 (en)
GB (1) GB755983A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125332A (en) * 1982-07-09 1984-03-07 Alfredo Cavalli An extruder for extruding pasta in the form of a thin continuous strip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2125332A (en) * 1982-07-09 1984-03-07 Alfredo Cavalli An extruder for extruding pasta in the form of a thin continuous strip

Also Published As

Publication number Publication date
ES219776A1 (en) 1955-03-16

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