IT1264465B1 - SET OF TOOLS FOR THE PRODUCTION OF SHEETS OF SYNTHETIC THERMOPLASTIC MATERIAL - Google Patents

SET OF TOOLS FOR THE PRODUCTION OF SHEETS OF SYNTHETIC THERMOPLASTIC MATERIAL

Info

Publication number
IT1264465B1
IT1264465B1 IT93MI001206A ITMI931206A IT1264465B1 IT 1264465 B1 IT1264465 B1 IT 1264465B1 IT 93MI001206 A IT93MI001206 A IT 93MI001206A IT MI931206 A ITMI931206 A IT MI931206A IT 1264465 B1 IT1264465 B1 IT 1264465B1
Authority
IT
Italy
Prior art keywords
cooling air
external
annular
annular slot
tool
Prior art date
Application number
IT93MI001206A
Other languages
Italian (it)
Inventor
Halter Hartmut
Original Assignee
Reifenhaeuser Masch
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 Reifenhaeuser Masch filed Critical Reifenhaeuser Masch
Publication of ITMI931206A0 publication Critical patent/ITMI931206A0/en
Publication of ITMI931206A1 publication Critical patent/ITMI931206A1/en
Application granted granted Critical
Publication of IT1264465B1 publication Critical patent/IT1264465B1/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
    • B29C48/88—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
    • B29C48/03—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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/008—Wide strips, e.g. films, webs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Complesso di attrezzi per la fabbricazione di fogli di materiale sintetico termoplastico mediante soffiaggio di un tubo flessibile di materiale sintetico termoplastico. Alla struttura fondamentale appartengono una testa porta-attrezzi costituita da una parte esterna di testa porta-attrezzi e una parte interna di testa porta-attrezzi che formano una fessura anulare per la massa fusa del materiale sintetico termoplastico con ugello a fessura anulare per l'uscita di questa massa fusa, e un impianto per l'aria di soffiaggio da introdurre nella bolla di foglio e rispettivamente da asportare dalla bolla di foglio, nonché un impianto di raffreddamento esterno. L'impianto di raffreddamento esterno presenta un complesso di distribuzione dell'aria di raffreddamento che corre intorno all'ugello a fessura anulare di uscita dell'aria di raffreddamento nella zona dello ugello a fessura anulare e un complesso di distribuzione dell'aria di raffreddamento superiore che corre tutto intorno, disposto sopra all'altro, con uscita dell'aria di raffreddamento superiore che corre tutto intorno in forma anulare. Le portate di aria di raffreddamento che escono attraverso la fessura anulare di uscita dell'aria di raffreddamento inferiore nonché le portate di aria di raffreddamento che escono attraverso la fessura anulare di uscita dell'aria di raffreddamento superiore sono comandabili e/o regolabili. Il complesso di distribuzione dell'aria di raffreddamento inferiore è suddiviso in segmenti di distribuzione dell'aria di raffreddamento che sono realizzati come canali di flusso dell'aria di raffreddamento con andamento nella direzione radiale e sono collegati sul lato esterno all'impianto di alimentazione dell'aria di raffreddamento esterna. Nei canali di flusso dell'aria di raffreddamento sono disposti a valvola comandabile autonomamente per una regolazione segmentale delle portate di aria di raffreddamento.Set of tools for the manufacture of sheets of thermoplastic synthetic material by blowing a flexible tube of thermoplastic synthetic material. The basic structure includes a tool-holder head consisting of an external part of a tool-holder head and an internal part of a tool-holder head which form an annular slot for the molten mass of the thermoplastic synthetic material with an annular slot nozzle for the exit. of this molten mass, and a blowing air system to be introduced into the sheet bubble and removed from the sheet bubble respectively, as well as an external cooling system. The external cooling system has a cooling air distribution assembly that runs around the annular slit nozzle for cooling air in the area of the annular slit nozzle and an upper cooling air distribution assembly which runs all around, arranged on top of the other, with an upper cooling air outlet which runs all around in an annular form. The flow rates of cooling air exiting through the annular slot of the lower cooling air outlet as well as the flow rates of cooling air exiting through the annular slot of the upper cooling air outlet are controllable and / or adjustable. The lower cooling air distribution assembly is divided into cooling air distribution segments which are made as cooling air flow channels with a trend in the radial direction and are connected on the external side to the power supply system of the external cooling air. In the cooling air flow channels they are arranged with an autonomously controllable valve for a segmental regulation of the cooling air flow rates.

IT93MI001206A 1992-06-10 1993-06-08 SET OF TOOLS FOR THE PRODUCTION OF SHEETS OF SYNTHETIC THERMOPLASTIC MATERIAL IT1264465B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4218995A DE4218995C2 (en) 1992-06-10 1992-06-10 Tool unit for the production of plastic films made of thermoplastic

Publications (3)

Publication Number Publication Date
ITMI931206A0 ITMI931206A0 (en) 1993-06-08
ITMI931206A1 ITMI931206A1 (en) 1994-12-08
IT1264465B1 true IT1264465B1 (en) 1996-09-23

Family

ID=6460725

Family Applications (1)

Application Number Title Priority Date Filing Date
IT93MI001206A IT1264465B1 (en) 1992-06-10 1993-06-08 SET OF TOOLS FOR THE PRODUCTION OF SHEETS OF SYNTHETIC THERMOPLASTIC MATERIAL

Country Status (2)

Country Link
DE (1) DE4218995C2 (en)
IT (1) IT1264465B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19842777C2 (en) * 1998-09-18 2002-05-08 Reifenhaeuser Masch Device for supplying cooling air to a film bubble of a tubular film extrusion system
DE19842778B4 (en) * 1998-09-18 2005-06-16 Reifenhäuser GmbH & Co Maschinenfabrik Method and tool arrangement for producing a tubular film
DE10029175B4 (en) * 1999-09-09 2004-10-07 Kdesign Gmbh Method and device for controlling and regulating the thickness profile in blown film production
DE20022174U1 (en) 1999-09-09 2001-05-17 Kdesign Gmbh Device for controlling and regulating the thickness profile in blown film production
US6739855B2 (en) † 2001-03-15 2004-05-25 Addex, Inc. External thickness control and method
DE502005006274D1 (en) 2005-06-23 2009-01-29 Kdesign Gmbh Controllable cooling gas ring with rectifier unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658518C2 (en) * 1976-12-23 1983-04-28 Reifenhäuser KG, 5210 Troisdorf Plant for the production of blown films made of thermoplastic material
US4330501A (en) * 1980-06-30 1982-05-18 Union Carbide Corporation Method and apparatus for cooling film bubble of low strain hardening polymers
DE3623548A1 (en) * 1986-07-12 1988-01-28 Reifenhaeuser Masch DEVICE FOR THE PRODUCTION OF PLASTIC FILMS
DE59002496D1 (en) * 1989-06-21 1993-09-30 Stefan Konermann METHOD AND DEVICE FOR THE PRODUCTION OF BLOW FILM.
DE4001287A1 (en) * 1990-01-18 1991-07-25 Stefan Konermann Local correction of blown film thickness using variable air flow

Also Published As

Publication number Publication date
ITMI931206A0 (en) 1993-06-08
DE4218995A1 (en) 1993-12-16
ITMI931206A1 (en) 1994-12-08
DE4218995C2 (en) 1994-08-11

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970626