GB1295205A - - Google Patents

Info

Publication number
GB1295205A
GB1295205A GB1295205DA GB1295205A GB 1295205 A GB1295205 A GB 1295205A GB 1295205D A GB1295205D A GB 1295205DA GB 1295205 A GB1295205 A GB 1295205A
Authority
GB
United Kingdom
Prior art keywords
cooling
film
zone
water
chamber
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
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 filed Critical
Publication of GB1295205A publication Critical patent/GB1295205A/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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
    • B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
    • B29C48/916—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means using vacuum

Abstract

1295205 Tubular films SHOWA DENKO KK 19 July 1971 [24 July 1970 8 Dec 1970] 33802/71 Heading B5B A process for the production of a tubular film of thermoplastic resin, comprising the steps of introducing a tubularly inflated film 2 of thermoplastic resin, extruded through the annular slit of a die 1 into an annular water cooling tank 6 having a central cooling channel lined with a pliable water-retentive element 10 and composed of a cooling zone 7, a sizing zone 8 and a draining zone 9, cooling the film to a temperature immediately above that at which crystallization would begin by means of the pliable element in the cooling zone, causing the film to be pressed against the inner wall of the cooling channel by means of inflation pressure and suction exerted in the sizing zone (as shown by means of suction orifices 12 formed on the inner wall of suction chamber 5), so as to confer tubular form on the film and allow the film to undergo crystallization, and removing remaining water adhering to the outer surface of the film in the draining zone. Specified film-forming materials include polyolefins, especially polyethylene and polypropylene. In the apparatus of Fig. 1, the suction chamber and the draining chamber are formed integrally and the combined suction and draining chamber communicates with a pipe 20 incorporating a vacuum pump so as to maintain the chamber in the state of a partial vacuum. Thus the cooling channel is composed of cooling zone 7, sizing zone 8 and draining zone 9 and these zones correspond to the inner walls respectively of the water-cooling chamber 4, suction orifices 12 and draining chamber 5. The inner wall of the cooling channel is fitted with a pliable water-retentive element 10. This may be made of felty material, non-woven fabric, tufty material, or spongy material, e.g. viscose sponge. The upper end of the cooling element is immersed into the water-cooling chamber 4 so that the entire cooling element can be sufficiently wetted with the cooling water. Water-feeding pipe 11 keeps the water at constant level. A suitable inflation pressure is maintained in the film by orifices 22, and as the film slides over the surface of the cooling element 10, it begins to undergo cooling by the cold water retained in said element 10. While passing this cooling zone, the film is still in an uncrystallized state. As the film begins to slide over sizing zone, 8, it is attracted toward the wall and held fast against element 10 because of the suction exerted through a plurality of suction orifices 12 formed on the inner wall of suction chamber 5. Thus the film is shaped, cooled and crystallized by the cold water. The apparatus of Fig. 3 incorporates a cooling mandrel.
GB1295205D 1970-07-24 1971-07-19 Expired GB1295205A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6433170 1970-07-24
JP10808070 1970-12-08

Publications (1)

Publication Number Publication Date
GB1295205A true GB1295205A (en) 1972-11-08

Family

ID=26405454

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295205D Expired GB1295205A (en) 1970-07-24 1971-07-19

Country Status (10)

Country Link
AT (1) AT349747B (en)
BE (1) BE770434A (en)
CA (1) CA965213A (en)
CH (1) CH523764A (en)
DE (1) DE2137000A1 (en)
DK (1) DK132063C (en)
FR (1) FR2099594B1 (en)
GB (1) GB1295205A (en)
NL (1) NL7110161A (en)
SE (1) SE355524B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113815166A (en) * 2021-10-29 2021-12-21 镇江荣诚管业有限公司 PP pipe water cooling device and using method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1490337A (en) * 1973-10-15 1977-11-02 Bakelite Xylonite Ltd Extrusion processes
GB1490338A (en) * 1973-10-15 1977-11-02 Bakelite Xylonite Ltd Extrusion processes
SE429941B (en) * 1978-08-22 1983-10-10 Tetra Pak Dev SET AND DEVICE FOR MANUFACTURING A MATERIAL COAT OF FOAMED THERMOPLASTIC

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450806A (en) * 1965-11-26 1969-06-17 Exxon Research Engineering Co Process and apparatus for the formation of film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113815166A (en) * 2021-10-29 2021-12-21 镇江荣诚管业有限公司 PP pipe water cooling device and using method thereof
CN113815166B (en) * 2021-10-29 2023-07-07 镇江荣诚管业有限公司 PP pipe water cooling device and application method thereof

Also Published As

Publication number Publication date
DE2137000A1 (en) 1972-01-27
BE770434A (en) 1971-12-01
CH523764A (en) 1972-06-15
NL7110161A (en) 1972-01-26
DK132063B (en) 1975-10-20
CA965213A (en) 1975-04-01
AT349747B (en) 1979-04-25
ATA647171A (en) 1978-09-15
FR2099594A1 (en) 1972-03-17
SE355524B (en) 1973-04-30
DK132063C (en) 1976-03-15
FR2099594B1 (en) 1974-03-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee