IE33555B1 - The manufacture of plastics sacks and tubular or sheet film - Google Patents

The manufacture of plastics sacks and tubular or sheet film

Info

Publication number
IE33555B1
IE33555B1 IE1222/69A IE122269A IE33555B1 IE 33555 B1 IE33555 B1 IE 33555B1 IE 1222/69 A IE1222/69 A IE 1222/69A IE 122269 A IE122269 A IE 122269A IE 33555 B1 IE33555 B1 IE 33555B1
Authority
IE
Ireland
Prior art keywords
mandrel
extrusion
die
temperature
tube
Prior art date
Application number
IE1222/69A
Other versions
IE33555L (en
Original Assignee
Goulding Ltd W & H M
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 Goulding Ltd W & H M filed Critical Goulding Ltd W & H M
Publication of IE33555L publication Critical patent/IE33555L/en
Publication of IE33555B1 publication Critical patent/IE33555B1/en

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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/87—Cooling
    • 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
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • 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
    • B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
    • B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
    • B29C48/865—Heating
    • 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
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/25—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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Making Paper Articles (AREA)

Abstract

1287404 Tubular films W & H M GOULD. ING Ltd 11 Sept 1969 [12 Sept 1968] 43324/68 Heading B5B Tubular film is made by extrusion of a melt through an annular orifice 3 defined by a mandrel 1 and a surrounding die 2, the mandrel being fitted with both cooling means 11 and heating means 9, the extruded tube being cooled by an external air blast from ring 10. The mandrel and die are first heated to the extrusion temperature, the mandrel by means of the induction heater 9 housed in a recess in the mandrel adjacent to the extrusion orifice; during extrusion the mandrel is cooled by circulation of fluid, preferably distilled water in stainless steel tubes housed in the cooling block 11, to a temperature in the neighbourhood of that of the die, but above the lower critical temperature of the plastics material at which a sharp increase in viscosity occurs. During extrusion air is blown through the axial duct 6 in the mandrel into the continuous extruded tube 7, and also from the teroidal ducts 10 on to the outside of the tube to cool it. The extruded tube is hauled from the extrusion orifice by a pair of nip rolls 5, which also collapse the tube as an air bubble is trapped between the nip rolls and the extrusion orifice. The apparatus is most suited to the manufacture of polythene films using a running temperature of 160‹ C. for the mandrel and 150‹ C. for the die. [GB1287404A]
IE1222/69A 1968-09-12 1969-08-29 The manufacture of plastics sacks and tubular or sheet film IE33555B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB43324/68A GB1287404A (en) 1968-09-12 1968-09-12 The manufacture of plastics bags, sacks and tubular or sheet film

Publications (2)

Publication Number Publication Date
IE33555L IE33555L (en) 1970-03-12
IE33555B1 true IE33555B1 (en) 1974-08-07

Family

ID=10428271

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1222/69A IE33555B1 (en) 1968-09-12 1969-08-29 The manufacture of plastics sacks and tubular or sheet film

Country Status (9)

Country Link
JP (1) JPS5144151B1 (en)
CA (1) CA926062A (en)
CH (1) CH497272A (en)
DE (2) DE1966951A1 (en)
DK (1) DK133805B (en)
FR (1) FR2018008A1 (en)
GB (1) GB1287404A (en)
IE (1) IE33555B1 (en)
NL (1) NL6913965A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL190570C (en) * 1978-05-05 1994-05-02 Lely Nv C Van Der Device for spreading granular and / or powdery material.
NL7810805A (en) * 1978-10-31 1980-05-02 Lely Nv C Van Der DEVICE FOR SPREADING GRAIN AND / OR POWDER MATERIAL.
DE2908949C2 (en) * 1979-03-07 1982-07-15 Amazonen-Werke H. Dreyer Gmbh & Co Kg, 4507 Hasbergen Centrifugal fertilizer spreader
JPS5885034U (en) * 1981-12-04 1983-06-09 株式会社イナックス Tile panels used in equipment units
DE3505382C2 (en) * 1985-02-16 1990-10-04 Accord-Landmaschinen Heinrich Weiste & Co Gmbh, 4770 Soest Two-disc fertilizer spreader
JPS6219431A (en) * 1985-07-19 1987-01-28 Terumo Corp Manufacture of annular thermoplastic resin film with roughened inner surface and device thereof
GB2190035A (en) * 1986-05-08 1987-11-11 Polysystems Machinery Manufact Film extrustion die-lip heater
DE3643853A1 (en) * 1986-12-22 1988-06-30 Amazonen Werke Dreyer H Broadcaster
JPH03119086U (en) * 1990-03-19 1991-12-09
JPH05222758A (en) * 1992-02-13 1993-08-31 Inax Corp Urinal unit

Also Published As

Publication number Publication date
IE33555L (en) 1970-03-12
DE1944918B2 (en) 1976-03-18
GB1287404A (en) 1972-08-31
DE1966951A1 (en) 1976-02-05
DK133805B (en) 1976-07-26
FR2018008A1 (en) 1970-05-29
JPS5144151B1 (en) 1976-11-26
DK133805C (en) 1976-12-13
NL6913965A (en) 1970-03-16
DE1944918A1 (en) 1970-03-19
DE6934811U (en) 1973-05-24
CH497272A (en) 1970-10-15
CA926062A (en) 1973-05-15

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