FR2271020A1 - Plastics sheet blowing from tube - using reduced temp. by evaporation of nitrogen or similar fluid - Google Patents

Plastics sheet blowing from tube - using reduced temp. by evaporation of nitrogen or similar fluid

Info

Publication number
FR2271020A1
FR2271020A1 FR7515391A FR7515391A FR2271020A1 FR 2271020 A1 FR2271020 A1 FR 2271020A1 FR 7515391 A FR7515391 A FR 7515391A FR 7515391 A FR7515391 A FR 7515391A FR 2271020 A1 FR2271020 A1 FR 2271020A1
Authority
FR
France
Prior art keywords
fluid
blowing
evaporation
nitrogen
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.)
Granted
Application number
FR7515391A
Other languages
French (fr)
Other versions
FR2271020B1 (en
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of FR2271020A1 publication Critical patent/FR2271020A1/en
Application granted granted Critical
Publication of FR2271020B1 publication Critical patent/FR2271020B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F3/00—Vehicles particularly adapted for collecting refuse
    • B65F3/02—Vehicles particularly adapted for collecting refuse with means for discharging refuse receptacles thereinto
    • B65F3/04—Linkages, pivoted arms, or pivoted carriers for raising and subsequently tipping receptacles
    • 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
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/9125—Cooling of hollow articles of tubular films internally

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Nozzles (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Method of fabrication by blowing is claimed for sheets of plastics matl in an installation ensuring direct internal cooling of a flexible tube which is to be formed into sheet, and through which the blowing fluid is blown, and is characterised in that the fluid is injected into the duct at low temp. as a liquid which evaporates inside the duct, the fluid being injected at supersonic velocity. The fluid is pref. N2. The plant for producing the sheet is much simpler and cheaper to construct and maintain than plant of prior art using a ventilator through which water runs to coal air used to blow the plastic sheet, while condensate has to be collected and pumped away from the heat exchanger. Cooling is faster.
FR7515391A 1974-05-17 1975-05-16 Plastics sheet blowing from tube - using reduced temp. by evaporation of nitrogen or similar fluid Granted FR2271020A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2424095A DE2424095A1 (en) 1974-05-17 1974-05-17 METHOD AND DEVICE FOR THE PRODUCTION OF PLASTIC BLOWED FILMS

Publications (2)

Publication Number Publication Date
FR2271020A1 true FR2271020A1 (en) 1975-12-12
FR2271020B1 FR2271020B1 (en) 1978-09-08

Family

ID=5915859

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7515391A Granted FR2271020A1 (en) 1974-05-17 1975-05-16 Plastics sheet blowing from tube - using reduced temp. by evaporation of nitrogen or similar fluid

Country Status (9)

Country Link
AT (2) ATA350475A (en)
AU (1) AU8122075A (en)
BE (1) BE829230A (en)
BR (1) BR7502987A (en)
CH (1) CH576330A5 (en)
DE (1) DE2424095A1 (en)
FR (1) FR2271020A1 (en)
NL (1) NL7505812A (en)
ZA (1) ZA753159B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483562A1 (en) * 1990-10-27 1992-05-06 Linde Aktiengesellschaft Method for manufacturing tubular films
EP0560521A1 (en) * 1992-03-10 1993-09-15 The Boc Group, Inc. Cooling method and apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434930B (en) * 1982-04-29 1984-08-27 Aga Ab PROCEDURAL KIT AND DEVICE FOR COOLING EXTRADED RUBRICULAR FORMS WITH LIQUID CHOICE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483562A1 (en) * 1990-10-27 1992-05-06 Linde Aktiengesellschaft Method for manufacturing tubular films
EP0560521A1 (en) * 1992-03-10 1993-09-15 The Boc Group, Inc. Cooling method and apparatus

Also Published As

Publication number Publication date
AT350475B (en) 1978-02-15
ATA350475A (en) 1978-02-15
DE2424095A1 (en) 1975-11-27
FR2271020B1 (en) 1978-09-08
BE829230A (en) 1975-09-15
ZA753159B (en) 1976-04-28
BR7502987A (en) 1976-04-13
CH576330A5 (en) 1976-06-15
NL7505812A (en) 1975-11-19
ATA792376A (en) 1978-10-15
AU8122075A (en) 1976-11-18

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Legal Events

Date Code Title Description
ST Notification of lapse