GB1287404A - The manufacture of plastics bags, sacks and tubular or sheet film - Google Patents

The manufacture of plastics bags, sacks and tubular or sheet film

Info

Publication number
GB1287404A
GB1287404A GB43324/68A GB4332468A GB1287404A GB 1287404 A GB1287404 A GB 1287404A GB 43324/68 A GB43324/68 A GB 43324/68A GB 4332468 A GB4332468 A GB 4332468A GB 1287404 A GB1287404 A GB 1287404A
Authority
GB
United Kingdom
Prior art keywords
mandrel
extrusion
die
temperature
tube
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
GB43324/68A
Inventor
Ronald Patrick Burke
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.)
W&HM Goulding Ltd
Original Assignee
W&HM Goulding 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 W&HM Goulding Ltd filed Critical W&HM Goulding Ltd
Priority to GB43324/68A priority Critical patent/GB1287404A/en
Priority to IE1222/69A priority patent/IE33555B1/en
Priority to CH1337569A priority patent/CH497272A/en
Priority to DE19691944918 priority patent/DE1944918C3/en
Priority to DE19691966951 priority patent/DE1966951A1/en
Priority to DE6934811U priority patent/DE6934811U/en
Priority to CA061474A priority patent/CA926062A/en
Priority to DK483869AA priority patent/DK133805B/en
Priority to FR6931086A priority patent/FR2018008A1/fr
Priority to JP44072622A priority patent/JPS5144151B1/ja
Priority to NL6913965A priority patent/NL6913965A/xx
Publication of GB1287404A publication Critical patent/GB1287404A/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
    • B29C48/78—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

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.
GB43324/68A 1968-09-12 1968-09-12 The manufacture of plastics bags, sacks and tubular or sheet film Expired GB1287404A (en)

Priority Applications (11)

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
IE1222/69A IE33555B1 (en) 1968-09-12 1969-08-29 The manufacture of plastics sacks and tubular or sheet film
CH1337569A CH497272A (en) 1968-09-12 1969-09-04 Process for the production of bags, sacks, film tubes or film webs made of plastic in the injection molding process as well as injection tools for carrying out the process
DE19691944918 DE1944918C3 (en) 1968-09-12 1969-09-04 Ring slot nozzle for extruding a blown film tube made of thermoplastic material
DE19691966951 DE1966951A1 (en) 1968-09-12 1969-09-04 PROCESS FOR EXTRUDING A BLOWED FILM TUBE, APPLICATION OF A RING SLOT NOZZLE TO EXECUTE THE PROCESS AND USE OF THE PRODUCT
DE6934811U DE6934811U (en) 1968-09-12 1969-09-04 INJECTION TOOL FOR MANUFACTURING FILM HOSES FROM PLASTIC.
CA061474A CA926062A (en) 1968-09-12 1969-09-09 Manufacture of plastics bags, sacks and tubular or sheet film
DK483869AA DK133805B (en) 1968-09-12 1969-09-10 Method for extruding tubular films using temperature control and apparatus for performing the method.
FR6931086A FR2018008A1 (en) 1968-09-12 1969-09-12
JP44072622A JPS5144151B1 (en) 1968-09-12 1969-09-12
NL6913965A NL6913965A (en) 1968-09-12 1969-09-12

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 (1)

Publication Number Publication Date
GB1287404A true GB1287404A (en) 1972-08-31

Family

ID=10428271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43324/68A Expired GB1287404A (en) 1968-09-12 1968-09-12 The manufacture of plastics bags, 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) DE6934811U (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
DE3505382A1 (en) * 1985-02-16 1986-08-21 Accord-Landmaschinen Heinrich Weiste & Co Gmbh, 4770 Soest DOUBLE DISC 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
DE1944918B2 (en) 1976-03-18
CH497272A (en) 1970-10-15
DK133805B (en) 1976-07-26
DE6934811U (en) 1973-05-24
CA926062A (en) 1973-05-15
DE1966951A1 (en) 1976-02-05
IE33555L (en) 1970-03-12
NL6913965A (en) 1970-03-16
DE1944918A1 (en) 1970-03-19
DK133805C (en) 1976-12-13
JPS5144151B1 (en) 1976-11-26
FR2018008A1 (en) 1970-05-29
IE33555B1 (en) 1974-08-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee