WO2006007971A1 - Dispositif de tirage et de mise a plat - Google Patents

Dispositif de tirage et de mise a plat Download PDF

Info

Publication number
WO2006007971A1
WO2006007971A1 PCT/EP2005/007228 EP2005007228W WO2006007971A1 WO 2006007971 A1 WO2006007971 A1 WO 2006007971A1 EP 2005007228 W EP2005007228 W EP 2005007228W WO 2006007971 A1 WO2006007971 A1 WO 2006007971A1
Authority
WO
WIPO (PCT)
Prior art keywords
take
rolls
film tube
torque
film
Prior art date
Application number
PCT/EP2005/007228
Other languages
German (de)
English (en)
Inventor
Karsten Golubski
Klemens Sensen
Original Assignee
Windmöller & Hölscher Kg
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 Windmöller & Hölscher Kg filed Critical Windmöller & Hölscher Kg
Publication of WO2006007971A1 publication Critical patent/WO2006007971A1/fr

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
    • B29C48/92—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
    • B29C2948/92038—Torque
    • 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
    • B29C2948/92085—Velocity
    • B29C2948/92095—Angular velocity
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92438—Conveying, transporting or storage of articles
    • 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
    • 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

Definitions

  • the invention relates to a trigger device according to the preamble of claim 1.
  • Such draw-off devices are generally used in plants for the production of plastic film hoses.
  • These film tubes are usually produced by supplying plastic melt to a blow head, in which the melt is distributed to an annular channel and leaves it through the nozzle gap. Immediately thereafter, the melt solidifies to form a film tube having a substantially circular cross-section.
  • a flattening unit follows, with which the film tube is folded into two superimposed film webs. One of the subsequent take-off rolls acts on the flat-laid film tube with a force which ensures the further transport of the film sheet.
  • a further processing device can, for example, be a device for reversing the film tube
  • a storage device can be a winding device in which the film tube is wound into a winding DE 100 40 055 C1 shows Some of the above elements, such as the flattening device, the take-off rolls and a reversing device.
  • one of the take-off rolls is driven by a drive torque acting on its axis.
  • This torque is generated by a drive such as an electric motor.
  • This take-off roll acts on the flattened film tube, which then in turn entrains the second take-off roll. Since the two webs of the flattened film tube are connected to each other only on their two side edges, this construction of the trigger device can lead to a reduced quality of the film tube. Thus, in practice, bow folds or edge folds have frequently appeared in one or both webs of the flattened film tube.
  • withdrawal devices are also known in which the film tube is already cut in the region of its side edges before it passes through the withdrawal devices and is thereby singulated into two film webs.
  • draw-off devices can also comprise more than two rollers.
  • An object of the present invention is therefore to propose a take-off device with which the quality losses of the film tubes caused by the withdrawal device can be reduced.
  • means are provided for providing torque for the axis of at least one further take-off roll.
  • torque By providing torque to the axle, it is meant that torque is transmitted directly to the axle. It is not meant that the moving foil has a force on the Peripheral surface of the take-off rolls exerts, which is implemented because of the stationary but rotatable mounting of the rollers in torque.
  • Means for providing torque for an axle may be drives, but especially also torque transmitting means, which transmits torque from a drive, for example, the torque applied to the first nip roll, for example, on the second roller.
  • the idea of the present invention is thus to apply a driving force to both sides of the film tube or both film webs for the purpose of transporting them from the opposite take-off rolls.
  • the side edges of the flattened film tube are now exposed to no and at least significantly lower mechanical loads, so that no more edge wrinkles can occur. Quality losses due to the passage of the trigger device are thus reduced or even completely prevented.
  • the means for providing torque for the axis of at least one further Absaugswalze mechanical torque transmission means which can be acted upon by the drive of the first take-off roll with torque.
  • the axis of the second take-off roll may be connected via gears, belts or chains with the axis of the first take-off roll. This connection can also exist directly to drive the first take-off roll. If more than two take-off rolls are present, the axes of all other take-off rolls are preferably also connected in terms of drive technology to the axis of the first take-off roll.
  • the drives act on the axes of the at least two take-off rolls without the interposition of transmission means. In this way, additional mechanical components can be saved.
  • edges of the folded film tube may have small edge folds. These are often caused by the fact that the take-off rolls used is drivable, with certain types of film, the edges of the folded film tube may have small edge folds. These are often caused by the fact that the
  • Diameter is different. For example, if one of the take-off rolls has a coating of elastomeric material, compression of that material can alter the effective radius of that roll. For this
  • the at least two take-off rolls can be driven at different speeds. These different speeds can be determined, for example, by a mechanical translation between the individual take-off rolls or between the drives and the take-off rolls.
  • Gear ratios greater than or less than 1 are conceivable.
  • the speeds of the at least two take-off rolls are independently variable. This can be reacted in different ways to the problem described above. If edge folds occur, one of the rolls can then be accelerated or slowed down relative to another roll.
  • Speed changes can be realized with mechanical connections via different gear stages, but can especially at
  • Deduction rollers which are each assigned a drive, via a
  • FIG. 3 a side view of the take-off device according to FIG.
  • Fig. 1 shows a known blown film extrusion plant 1.
  • the filler neck 4, a plastic is supplied, which is then plasticized in the extruder 3.
  • the resulting mass is supplied via a connecting line 14 to the blowing head 5, which forms a film tube 9.
  • the film tube 9 leaves the blowing head 5 by a non-visible annular nozzle in the transport direction z. Due to the supply of compressed air through the fan nozzle 15 of the film tube is expanded immediately after leaving the Blaskopfes 5.
  • the diameter of the film tube 9 is limited by the calibration 20.
  • Within the Kalibrierkorbes 20 of the film tube 9 is guided by plates 28, which is directed by compressed air onto the film tube.
  • the calibration basket 20 also consists of a frame 21 and 6.
  • a flattening unit 21 After leaving the Kalibrierkorbes 20 of the film tube 9 passes into a flattening unit 21, in which the film tube 9 is almost or completely reshaped to a double-layered film web.
  • the film tube 9 is guided between pairs of guide elements 7, 13, which assume an ever smaller distance from each other in the course of the transport direction z.
  • the complete flattening is done by a take-off device 22, which consists of a pair of take-off rolls 8, 8 '.
  • the film web 9 can now be guided by a reversing device, not shown, but known for example from DE 100 40 055 C1, or, as in the case of the device shown, are fed directly via deflecting rollers 10 a winding device 11, where the film web 9 to form a winding 12 is processed.
  • FIGs 2 and 3 shows a detailed view of the extraction device according to the invention 22.
  • A, A ' the directions of rotation of the take-off rolls 8, 8' are designated.
  • Figures 4 and 5 show a further embodiment of a discharge device 22 according to the invention. In this case, the motors 23, 23 'act directly on the axes 26, 26' of the take-off rolls 8 and 8 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Winding Of Webs (AREA)

Abstract

L'invention concerne un dispositif de tirage (22) d'un dispositif de fabrication de film tubulaire (1), au moyen duquel le film tubulaire peut être écrasé de façon à ce que l'air contenu dans ce dernier se dégage et le tube ou les bandes de film formées à partir du tube peut (peuvent) être acheminé(es) à un dispositif de transformation et/ou de stockage (12), lequel dispositif de tirage comporte au moins deux cylindres de tirage (8, 8'), placés des deux côtés du parcours du film tubulaire (9) et pouvant être mis en contact avec ce dernier (9), ainsi qu'un entraînement (23) destiné à fournir un couple de rotation à l'axe (26) d'un des cylindres de tirage (8). L'invention se caractérise en ce que ce dispositif de tirage comporte des moyens destinés à fournir un couple de rotation à l'axe (26') d'au moins un autre cylindre de tirage (8').
PCT/EP2005/007228 2004-07-16 2005-07-01 Dispositif de tirage et de mise a plat WO2006007971A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004034635 2004-07-16
DE102004034635.6 2004-07-16
DE102005004496.4 2005-02-01
DE102005004496A DE102005004496B4 (de) 2004-07-16 2005-02-01 Abzugsvorrichtung

Publications (1)

Publication Number Publication Date
WO2006007971A1 true WO2006007971A1 (fr) 2006-01-26

Family

ID=35355131

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/007228 WO2006007971A1 (fr) 2004-07-16 2005-07-01 Dispositif de tirage et de mise a plat

Country Status (2)

Country Link
DE (1) DE102005004496B4 (fr)
WO (1) WO2006007971A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8651006B2 (en) 2008-06-26 2014-02-18 Krones Ag Apparatus and method for producing individual blanks from a film web

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976567A (en) * 1957-10-16 1961-03-28 Dow Chemical Co Process and apparatus for upgrading thermoplastic film
EP0010873A1 (fr) * 1978-10-04 1980-05-14 Du Pont Canada Inc. Filet plat en matière plastique ainsi que méthode et dispositif pour fabriquer un filet plat
US4682941A (en) * 1985-06-11 1987-07-28 Windmoller & Holscher Flattening and take-off apparatus for providing a plastic film web from a blown tubular film
US5202068A (en) * 1990-10-24 1993-04-13 Modern Controls, Inc. Method and apparatus for controlling blown film thickness
EP0963830A1 (fr) * 1998-06-08 1999-12-15 K & S Future Design Inc. Appareil pour la production d'un film plastique
JP2004090464A (ja) * 2002-08-30 2004-03-25 Toshiba Mach Co Ltd フィルム製造装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10040055C2 (de) * 2000-08-11 2002-10-31 Windmoeller & Hoelscher Abzugsvorrichtung für Schlauchbahnen aus Kunststofffolie

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976567A (en) * 1957-10-16 1961-03-28 Dow Chemical Co Process and apparatus for upgrading thermoplastic film
EP0010873A1 (fr) * 1978-10-04 1980-05-14 Du Pont Canada Inc. Filet plat en matière plastique ainsi que méthode et dispositif pour fabriquer un filet plat
US4682941A (en) * 1985-06-11 1987-07-28 Windmoller & Holscher Flattening and take-off apparatus for providing a plastic film web from a blown tubular film
US5202068A (en) * 1990-10-24 1993-04-13 Modern Controls, Inc. Method and apparatus for controlling blown film thickness
EP0963830A1 (fr) * 1998-06-08 1999-12-15 K & S Future Design Inc. Appareil pour la production d'un film plastique
JP2004090464A (ja) * 2002-08-30 2004-03-25 Toshiba Mach Co Ltd フィルム製造装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8651006B2 (en) 2008-06-26 2014-02-18 Krones Ag Apparatus and method for producing individual blanks from a film web

Also Published As

Publication number Publication date
DE102005004496B4 (de) 2009-09-10
DE102005004496A1 (de) 2006-02-09

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