GB1025714A - Extruded thermoplastic films and method and apparatus for producing same - Google Patents

Extruded thermoplastic films and method and apparatus for producing same

Info

Publication number
GB1025714A
GB1025714A GB38406/62A GB3840662A GB1025714A GB 1025714 A GB1025714 A GB 1025714A GB 38406/62 A GB38406/62 A GB 38406/62A GB 3840662 A GB3840662 A GB 3840662A GB 1025714 A GB1025714 A GB 1025714A
Authority
GB
United Kingdom
Prior art keywords
film
air blade
die
rolls
sides
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
GB38406/62A
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.)
Millennium Petrochemicals Inc
Original Assignee
National Destillers and Chemical Corp
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
Priority claimed from US144253A external-priority patent/US3275039A/en
Application filed by National Destillers and Chemical Corp filed Critical National Destillers and Chemical Corp
Publication of GB1025714A publication Critical patent/GB1025714A/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
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films

Landscapes

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

Abstract

1,025,714. Tubular films. NATIONAL DISTILLERS & CHEMICAL CORPORATION. Oct. 10, 1962 [Oct. 10, 1961], No. 38406/62. Heading B5B. Tubular thermoplastic film is made by extruding a molten thermoplastic material through a die orifice formed by two parallel slits interconnected at each end and opposing sides of the tube are held apart for separate cooling by permitting air to enter the tube through the portion of the die which is between the two slits. Both the flat sheet portion and interconnecting bead portions of the tube may be of a substantially uniform guage, or one of the flat sheet portions may be of a gauge greater than that of the other, or the bead portions may be of a gaugesubstantially greater than that of either of the flat sheet portions. In apparatus as shown, the molten thermoplastic material passes through the extruder barrel 2 into the extrusion head 1 by way of conduit 51, and into the passageway 52. Thence the flow is divided by the fluid conduit element 68, to pass upwardly around the air blade 9 (Fig. 2, not shown) and outwardly from the continuous orifice formed by the air blade 9, die. lips 5 and 6, and deckle plates 61. Air blade 9 comprises two parallel sides 9a and 9b, each having semi-circular recesses at intervals therein, the recesses in the two sides being opposite each other so as to form a series of cylindrical air blade passageways 70 (Fig. 2, not shown). A chilled fluid, e.g. refrigerated air, is introduced into the conduit element 68 and is discharged by way of the air blade passageways 70 between the two sides of the film, so as to keep them apart and urge them into surface contact with the chill rolls 25. Rolls 25 are chilled by circulation of a refrigerated liquid, e.g. water, through the conduit system 35, 24, 36 and driven by motor 31 through the chain and sprocket system 28, the film passing between the rolls 25 to the nip rolls 41, 42. By means of bolts 62, 65, die lips 5 and 6 may be moved laterally to adjust the width of either side of the film. By means of bolts 84 (Fig. 2, not shown), the deckle plate elements 61 (Fig. 2, not shown) may be moved laterally to adjust the width of either end-portion of the film.
GB38406/62A 1961-10-10 1962-10-10 Extruded thermoplastic films and method and apparatus for producing same Expired GB1025714A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US144253A US3275039A (en) 1961-10-10 1961-10-10 Seamless extruded thermoplastic selfsustaining lay-flat continuous tube
US25961963A 1963-02-06 1963-02-06

Publications (1)

Publication Number Publication Date
GB1025714A true GB1025714A (en) 1966-04-14

Family

ID=26841806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38406/62A Expired GB1025714A (en) 1961-10-10 1962-10-10 Extruded thermoplastic films and method and apparatus for producing same

Country Status (3)

Country Link
BE (1) BE623459A (en)
GB (1) GB1025714A (en)
NL (1) NL284172A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117656412A (en) * 2024-01-31 2024-03-08 青州市汇源包装材料有限公司 Four-layer co-extrusion plastic film extrusion casting forming production device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117656412A (en) * 2024-01-31 2024-03-08 青州市汇源包装材料有限公司 Four-layer co-extrusion plastic film extrusion casting forming production device
CN117656412B (en) * 2024-01-31 2024-04-09 青州市汇源包装材料有限公司 Four-layer co-extrusion plastic film extrusion casting forming production device

Also Published As

Publication number Publication date
NL284172A (en) 1900-01-01
BE623459A (en) 1900-01-01

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