IT1264466B1 - METHOD FOR THE OPERATION OF A SYNTHETIC SHEET BLOWERING PLANT - Google Patents

METHOD FOR THE OPERATION OF A SYNTHETIC SHEET BLOWERING PLANT

Info

Publication number
IT1264466B1
IT1264466B1 IT93MI001207A ITMI931207A IT1264466B1 IT 1264466 B1 IT1264466 B1 IT 1264466B1 IT 93MI001207 A IT93MI001207 A IT 93MI001207A IT MI931207 A ITMI931207 A IT MI931207A IT 1264466 B1 IT1264466 B1 IT 1264466B1
Authority
IT
Italy
Prior art keywords
adjustment elements
elements
positioning actuators
sheets
help
Prior art date
Application number
IT93MI001207A
Other languages
Italian (it)
Inventor
Halter Hartmut
Original Assignee
Reifenhauser Gmbh & Co Maschne
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 Reifenhauser Gmbh & Co Maschne filed Critical Reifenhauser Gmbh & Co Maschne
Publication of ITMI931207A0 publication Critical patent/ITMI931207A0/en
Publication of ITMI931207A1 publication Critical patent/ITMI931207A1/en
Application granted granted Critical
Publication of IT1264466B1 publication Critical patent/IT1264466B1/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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • 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
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/001—Tubular films, sleeves

Abstract

Metodo per l'esercizio di un impianto di soffiaggio di fogli di materiale sintetico l'ugello a fessura anulare dell'impianto presenta almeno un labbro dell'ugello a fessura anulare deformabile, con elementi di registrazione distribuiti in maniera equidistante sulla circonferenza per una correzione per segmenti degli errori di spessore. Il sistema di raffreddamento esterno presenta un comando per segmenti delle portate dell'aria di raffreddamento. Il sistema di raffreddamento esterno presenta inoltre una parte costruttiva a disco obliquo registrabile alla maniera di un disco obliquo, collegata a corrispondenti attuatori di posizionamento. Gli elementi di registrazione nonché gli elementi di regolazione e inoltre gli attuatori di posizionamento appartengono, come organi di registrazione, ad un impianto di regolazione equipaggiato di elaboratore per la riduzione delle tolleranze trasversali dei fogli di materiale sintetico. Con l'aiuto degli elementi di registrazione e/o degli elementi di regolazione, si minimizzano le tolleranze trasversali dei fogli di materiale sintetico. Con gli attuatori di posizionamento si compensa l'errore fondamentale di centraggio dell'ugello a fessura anulare. Con l'aiuto degli elementi di registrazione e/o degli elementi di regolazione e/o degli attuatori di posizionamento, si imprime sulla bolla di foglio un errore periodico di spessore. Lerrore periodico di spessore viene ricavato, con l'aiuto del calcolatore dell'impianto di regolazione, dai valori di misura dello spessore con i quali vengono formate le deviazioni regolari.Method for the operation of a blowing plant of sheets of synthetic material the annular slit nozzle of the implant has at least one lip of the deformable annular slit nozzle, with adjustment elements distributed equally on the circumference for a correction for thickness error segments. The external cooling system has a segment control of the cooling air flow rates. The external cooling system also has an oblique disc construction part that can be adjusted in the manner of an oblique disc, connected to corresponding positioning actuators. The registration elements as well as the adjustment elements and furthermore the positioning actuators belong, as registration elements, to a regulation system equipped with a computer for the reduction of the transverse tolerances of the sheets of synthetic material. With the help of the adjustment elements and / or the adjustment elements, the transverse tolerances of the sheets of synthetic material are minimized. The positioning actuators compensate for the fundamental error of centering the ring-slot nozzle. With the help of the adjustment elements and / or the adjustment elements and / or the positioning actuators, a periodic thickness error is impressed on the sheet. The periodic thickness error is obtained, with the help of the control system calculator, from the thickness measurement values with which the regular deviations are formed.

IT93MI001207A 1992-06-10 1993-06-08 METHOD FOR THE OPERATION OF A SYNTHETIC SHEET BLOWERING PLANT IT1264466B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4218993A DE4218993C1 (en) 1992-06-10 1992-06-10 Fault-free blown film tubing prodn. - using machine with extruding nozzle and air cooling system fitted with circumferential gauges connected to computer to correct deviations

Publications (3)

Publication Number Publication Date
ITMI931207A0 ITMI931207A0 (en) 1993-06-08
ITMI931207A1 ITMI931207A1 (en) 1994-12-08
IT1264466B1 true IT1264466B1 (en) 1996-09-23

Family

ID=6460723

Family Applications (1)

Application Number Title Priority Date Filing Date
IT93MI001207A IT1264466B1 (en) 1992-06-10 1993-06-08 METHOD FOR THE OPERATION OF A SYNTHETIC SHEET BLOWERING PLANT

Country Status (2)

Country Link
DE (1) DE4218993C1 (en)
IT (1) IT1264466B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1400516B1 (en) * 2010-06-22 2013-06-11 Im Plast S R L METHOD AND DEVICE TO CONTROL THE THICKNESS OF FILM IN BUBBLE EXTRUDERS
DE102011018320B4 (en) * 2011-04-20 2015-07-02 Hosokawa Alpine Ag Method and device for thickness profile control
IT201700055831A1 (en) * 2017-05-23 2018-11-23 Syncro S R L DEVICE AND METHOD TO ADJUST THE THICKNESS PROFILE IN BLOWN FILM PRODUCTION

Family Cites Families (4)

* 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
DE2950003C2 (en) * 1979-12-12 1983-08-11 Windmöller & Hölscher, 4540 Lengerich Process for regulating the film thickness on a blown film extruder
EP0478641B2 (en) * 1989-06-21 2001-11-07 KONERMANN, Stefan Process and device for producing bubble-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
ITMI931207A1 (en) 1994-12-08
ITMI931207A0 (en) 1993-06-08
DE4218993C1 (en) 1993-07-01

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