IT1264468B1 - PLANT FOR EXTRUSION OF BLOWN SHEETS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC MATERIAL AND METHOD FOR MANAGING THE PLANT - Google Patents

PLANT FOR EXTRUSION OF BLOWN SHEETS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC MATERIAL AND METHOD FOR MANAGING THE PLANT

Info

Publication number
IT1264468B1
IT1264468B1 IT93MI001210A ITMI931210A IT1264468B1 IT 1264468 B1 IT1264468 B1 IT 1264468B1 IT 93MI001210 A IT93MI001210 A IT 93MI001210A IT MI931210 A ITMI931210 A IT MI931210A IT 1264468 B1 IT1264468 B1 IT 1264468B1
Authority
IT
Italy
Prior art keywords
sheet
elements
cooling air
slit nozzle
annular slit
Prior art date
Application number
IT93MI001210A
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 ITMI931210A0 publication Critical patent/ITMI931210A0/en
Publication of ITMI931210A1 publication Critical patent/ITMI931210A1/en
Application granted granted Critical
Publication of IT1264468B1 publication Critical patent/IT1264468B1/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
    • 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
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92152—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—Calibration, after-treatment, or cooling 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92923—Calibration, after-treatment or cooling zone

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

Impianto per l'estrusione di fogli soffiati per la produzione di un foglio di materiale sintetico. Un tubo flessibile precursore viene estruso da materiale sintetico termoplastificato e viene soffiato a dare una bolla di foglio. Questa viene posata piatta. L'impianto per l'estrusione di fogli soffiati possiede una testa di soffiaggio con ugello a fessura anulare nonché con labbri dell'ugello a fessura anulare interno ed esterno, chiusi, circondanti l'ugello deformabili elasticamente, per l'uscita del tubo flessibile precursore un impianto per la soffiatura del tubo flessibile precursore a dare la bolla di foglio, e un dispositivo di raffreddamento esterno con complesso di distribuzione dell'aria di raffreddamento disposto al suo intorno. Almeno uno dei labbri dell'ugello a fessura anulare, nel funzionamento dell'impianto per l'estrusione di fogli soffiati, è pretensionato mediante elementi di registrazione suddivisi in forma segmentale sulla circonferenza del labbro dell'ugello a fessura anulare, che agiscono sostanzialmente in direzione radiale. Il complesso di distribuzione dell'aria di raffreddamento è suddiviso in singoli segmenti di distribuzione dell'aria di raffreddamento che presentano elementi di regolazione della portata quantitativa della corrente di aria di raffreddamento. Da una parte gli elementi di registrazione dei labbri dell'ugello a fessura anulare o rispettivamente del labbro dell'ugello a fessura anulare e dall'altra parte gli elementi di regolazione della portata quantitativa della corrente di aria di raffreddamento appartengono, come elementi di regolazione, ad un impianto di regolazione per la riduzione delle tolleranze trasversali nel foglio di materiale sintetico finito. L'impianto di regolazione agisce a misura delle deviazioni di regolazione sugli elementi di registrazione e/o sugli elementi di regolazione della portata della corrente di aria di raffreddamento.Extrusion plant for blown sheets for the production of a sheet of synthetic material. A precursor flexible tube is extruded from thermoplastic synthetic material and is blown to give a sheet bubble. This is laid flat. The blown sheet extrusion plant has a blowing head with an annular slit nozzle as well as internal and external annular slit nozzle lips, closed, surrounding the elastically deformable nozzle, for the exit of the precursor hose a system for blowing the precursor flexible tube to give the sheet bubble, and an external cooling device with a cooling air distribution assembly arranged around it. At least one of the lips of the annular slit nozzle, in the operation of the blown sheet extrusion plant, is pre-tensioned by means of segmented registration elements on the circumference of the lip of the annular slit nozzle, which act substantially in the direction radial. The cooling air distribution assembly is divided into individual cooling air distribution segments which have elements for regulating the quantitative flow rate of the cooling air stream. On the one hand the adjusting elements of the lips of the annular slit nozzle or respectively of the lip of the annular slit nozzle and on the other hand the regulating elements of the quantitative flow rate of the cooling air stream belong, as regulating elements, to a regulation system for the reduction of transverse tolerances in the finished synthetic material sheet. The regulation system acts to measure the regulation deviations on the recording elements and / or on the regulation elements of the flow rate of the cooling air current.

IT93MI001210A 1992-06-10 1993-06-08 PLANT FOR EXTRUSION OF BLOWN SHEETS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC MATERIAL AND METHOD FOR MANAGING THE PLANT IT1264468B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4218997A DE4218997C1 (en) 1992-06-10 1992-06-10 Appts. for prodn. of plastic film from extrude blown tubing - produces close tolerances by dividing cooling system into segments of circumference of blowing nozzle each with finely controlled valve

Publications (3)

Publication Number Publication Date
ITMI931210A0 ITMI931210A0 (en) 1993-06-08
ITMI931210A1 ITMI931210A1 (en) 1994-12-08
IT1264468B1 true IT1264468B1 (en) 1996-09-23

Family

ID=6460727

Family Applications (1)

Application Number Title Priority Date Filing Date
IT93MI001210A IT1264468B1 (en) 1992-06-10 1993-06-08 PLANT FOR EXTRUSION OF BLOWN SHEETS FOR THE PRODUCTION OF A SHEET OF SYNTHETIC MATERIAL AND METHOD FOR MANAGING THE PLANT

Country Status (2)

Country Link
DE (1) DE4218997C1 (en)
IT (1) IT1264468B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2289432B (en) * 1994-05-18 1998-06-17 Windmoeller & Hoelscher A film blowing head for producing tubular film webs of a thermoplastic synthetic material
DE20022174U1 (en) 1999-09-09 2001-05-17 Kdesign GmbH, 51371 Leverkusen 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
DE502007002362D1 (en) * 2007-10-22 2010-01-28 Kdesgin Gmbh Device with a controllable main cooling gas ring with rectifier unit and an additional cooling gas ring
DE102009033171B4 (en) 2009-07-13 2016-03-03 Hosokawa Alpine Ag Method for controlling the film thickness of stretched tubular films and apparatus for carrying out the method
DE202013012784U1 (en) † 2013-07-19 2019-08-02 Windmöller & Hölscher Kg Device for producing inline stretched films
JP5634630B1 (en) 2014-04-14 2014-12-03 株式会社湘南貿易 Uneven thickness adjustment type air ring
ITUB20151292A1 (en) * 2015-05-28 2016-11-28 Doteco S P A APPARATUS AND METHOD FOR PRODUCING A BUBBLE EXTRUDED FILM
US11207799B2 (en) * 2017-06-26 2021-12-28 Wisconsin Alumni Research Foundation Pelletization gas guide

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
DE4001287A1 (en) * 1990-01-18 1991-07-25 Stefan Konermann Local correction of blown film thickness using variable air flow
ATE93447T1 (en) * 1989-06-21 1993-09-15 Stefan Konermann METHOD AND DEVICE FOR PRODUCTION OF BLOWN FILM.
DE8908769U1 (en) * 1989-07-19 1989-09-14 Reinhold, Klaus, 49525 Lengerich Extraction device for tubular plastic film
DE4013610A1 (en) * 1989-10-26 1991-05-02 Reifenhaeuser Masch Blown film extruder thickness error corrector - comprises elastically deformable annular die lip acted upon by piezoelectric elements

Also Published As

Publication number Publication date
ITMI931210A0 (en) 1993-06-08
DE4218997C1 (en) 1994-01-20
ITMI931210A1 (en) 1994-12-08

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