EP2296864A1 - Dispositif d'étirage transversal de feuilles continues - Google Patents

Dispositif d'étirage transversal de feuilles continues

Info

Publication number
EP2296864A1
EP2296864A1 EP09737740A EP09737740A EP2296864A1 EP 2296864 A1 EP2296864 A1 EP 2296864A1 EP 09737740 A EP09737740 A EP 09737740A EP 09737740 A EP09737740 A EP 09737740A EP 2296864 A1 EP2296864 A1 EP 2296864A1
Authority
EP
European Patent Office
Prior art keywords
guide rail
rollers
magnet
clamping
magnets
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.)
Withdrawn
Application number
EP09737740A
Other languages
German (de)
English (en)
Inventor
Kai Urbanzyk
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.)
Lindauer Dornier GmbH
Original Assignee
Lindauer Dornier 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 Lindauer Dornier GmbH filed Critical Lindauer Dornier GmbH
Publication of EP2296864A1 publication Critical patent/EP2296864A1/fr
Withdrawn legal-status Critical Current

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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/20—Edge clamps

Definitions

  • the invention relates to a device for transverse stretching of film webs.
  • a plurality of clamping clips is assembled to form endlessly circulating clip chains, which are arranged on both sides of a film web in the longitudinal direction.
  • the film web is transported at elevated temperature through the transverse stretching system and thereby stretched.
  • Such a transverse stretching system is described, for example, in DE 3703097.
  • the guide rails on which the tensioning clamps run generally have a rectangular, vertically oriented cross section.
  • the entire guide system for the clip chains is composed on each side of the film web of a plurality of straight, oblique and curved portions of such guide rails in the running direction.
  • the plastic film is detected by a number of tensioning clamps on both sides of the film web at the edge and transported in the longitudinal direction through the stretching unit.
  • the mutually arranged guide rails for the clip chains are designed so that in certain areas of the transverse stretching the distance between the clip chains is larger, so that the stretched in the clamping clips film is stretched transversely to the direction.
  • the tensioning clamps release the film web. There, an area is provided in which the endless clip chain is driven, deflected and returned to the starting point via another guide system.
  • the tensioning clamp generally consists of a base body, a mechanism for clamping the film web, elements for connecting the individual clamping clips to a chain and rollers for vertical and horizontal guidance of the tensioning clamp on the guide rail.
  • rollers for horizontal guidance not only lead the clamping unit on the guide rail, but also absorb the tensile forces of the film web.
  • These rollers are usually arranged opposite each other in the base body so that they are supported on the two-sided vertical raceways of the guide rail. This ensures that the tensioning clamp with or without film tension even at high
  • EP 0 471 052 B1 proposes to press a roller, which can be adjusted transversely to the running direction, for horizontal guidance of the clamping unit by means of a complex lever system against the guide rail, so that the clearance existing in the prior art is always reduced to zero.
  • This lever arrangement is mechanically complex and also causes always all opposing rollers of the clamping assembly under bias in contact with the rail and thus friction losses in the bearings of the rollers and in contact between rollers and guide rail arise.
  • the object of the invention is to provide a device with clamps on a transverse stretching, in which even at high operating speeds an acceptable level of vibration, noise, wear and friction losses is achieved. According to the invention, this object is achieved by the features specified in claim 1. Further advantageous embodiments of the invention will become apparent from the dependent claims and the description.
  • the basic feature of the invention is the use of a device for generating magnetic forces, which is arranged on the device so that the tensioning clamp is permanently attracted to the guide rail in a defined direction, regardless of whether film tension is present or not.
  • An expedient direction is that in which the foil pull also becomes effective during the transverse stretching process, so that when it is exposed in the edge regions of the system, the force relationships on the tensioning clamp remain controlled and thus the running of the tensioning clamp on the guide rail is stabilized.
  • a magnetic position is provided on the tensioning roller, in which there is always a small distance, for example 1 mm, between the magnet and the guide rail when the tensioning roller runs along the guide rail. This distance is the air gap, in which the magnetic field builds up between the guide rail and the magnet, the force of which pulls the tensioning clamp with the associated rollers to the guide rail.
  • the guide rail must consist of a magnetically suitable material familiar to the person skilled in the art, for example steel. With high-performance magnets available today, forces of sufficient magnitude can be made available. An orientation for the required magnitude of the magnetic forces gives the weight of a typical clamping unit, which may be for example 6 kg.
  • the magnet must overcome at least the weight, under the action of which the clamping plate tends to tilt on the guide rail in the absence of film tension.
  • the rollers which are arranged on the same side of the guide rail, such as the magnet, constantly in contact with the guide rail.
  • the position of the components is chosen so that there is no contact between the magnet and the guide rail. Due to the magnetic force, the clamping unit is stabilized in the barrel, the rollers are not disengaged. Thus, no tarnishing and running of the rollers takes place, with the result that the wear of rollers and guide rails is reduced.
  • the rollers, which are arranged on the other side of the guide rail not or rarely come into engagement with the guide rail.
  • the magnet facing away from the side of the guide rail are completely dispensed with.
  • tenter clips With known tenter clips, it is common to have several adjacent casters, e.g. a pair of rollers, to provide for the support of the tensioning clamp against the guide rail.
  • a pair of rollers can be used, which are also arranged one above the other.
  • a single magnet With sufficient force, a single magnet can be placed between two rollers. If the force of a magnet is not sufficient, several magnets in the direction before, behind and / or between the rollers can be arranged.
  • the air gap in which the magnetic field builds up between the magnet and the guide rail decisively determines the magnetic forces that occur and thus the force with which the tensioning clamp is drawn to the guide rail.
  • the magnetic forces are greater, the smaller the air gap.
  • other adjustment means known to the person skilled in the art for the position of such a component are also applicable. In the operation of such a system, abrasion inevitably occurs on the mechanical components.
  • This device may for example consist of one or more brushes, which are arranged at a suitable point of the guide system so that the magnets with a running clip chain past it, so that any adhering to the magnet abrasion particles are stripped off.
  • the magnets are arranged so that they meet in a region of the guide rail, which is not rolled over by the rollers on the arranged on the guide rail brushes.
  • the device can also be supplemented by suction devices integrated into the guide rail, which sucks the adhering dirt from the brushes and / or the magnet.
  • the clip chain with the tensioning clips is here additionally equipped with a power supply system which consists of stationary machine parts - e.g. the guide rail is supplied with power via springy sliding contacts similar to railway systems.
  • a power supply system which consists of stationary machine parts - e.g. the guide rail is supplied with power via springy sliding contacts similar to railway systems.
  • the cleaning brushes to remove the abrasion of the Magnet series to be attached to the clamps.
  • the suction device is in turn firmly attached to a suitable location in the region of the guide rail.
  • the magnetic series could be interrupted for a short distance; so that the brushes do not run past a magnet over a short distance but past a suction nozzle.
  • Figure 1 A partial perspective view of a device according to the invention with
  • Figure 2 A perspective view of the tensioning clamp without guide rail with view from within the film web
  • FIG. 3 View of the tensioning clamp with alternative arrangements of magnets
  • Figure 4 View of the device with cleaning elements and power
  • FIG. 4a section of FIG. 4
  • Figure 5 View of the device with magnets in the guide rail
  • a device according to the invention is drawn with tensioning clamp 1, which is supported by means of a plurality of rollers 7a, 7b, 7c on a guide rail 2.
  • the rollers are mounted on the base body 4 of the clamping unit.
  • the tensioning clamp is assembled via chain links 6 with a plurality of further tensioning clamps, not shown, to form a endless chain track circulating endlessly in a transverse stretching device.
  • Shown is a clamping unit with guide rail on one side of a film web 3, the in Arrow direction is passed through the Querreckstrom.
  • the structure of the guide system consisting of clamping clips and guide rails is symmetrical to the longitudinal direction of the film.
  • an adjusting screw 9 is shown on a magnet 8, which allows a nut / lock nut combination, the adjustment of the position of the magnet 8 in the direction of the guide rail.
  • a slot can be additionally arranged below the magnet in the main body with a further fastening screw in order to securely receive the magnetic forces.
  • the arrangement of the magnets 8 according to the invention is adaptable to the arrangement of the rollers, as shown in Figure 3.
  • the magnets can between two rollers and / or in the direction before and behind the
  • FIGS. 4 and 4a show the tensioning clamp 1 with the guide rail 2 and one
  • the brush 10 and a suction device 11 The brush is in a section of
  • Guide rail mounted, which is not overrun by the rollers.
  • the magnets on the base body 4 above or below the rollers so arranged outside the running in the longitudinal direction of the guide rail 2 contact zone between rollers and guide rail.
  • FIG. 4 also shows, by way of example, a control and power supply system 13, 12, which conducts current to the guide rail 2 for the electromagnets to be used as an alternative. From the supply line 12 is passed through lines within the guide rail 2, the current to a on the guide rail in the direction of the tensioning clamp continuous busbar 15 and fed from there via not shown, spring-loaded sliding contacts in the tensioning clamp the electromagnet.
  • the busbar 15 is to be mounted above or below the track of the rollers 7.
  • the power supply to the magnets is interrupted at times that are adjustable by the operator of the system, to assist the cleaning of the magnets via the brush 10 and the suction device 11.
  • Figure 5 shows the device in reverse execution.
  • a series of magnets 8 is arranged on the guide rail 2.
  • magnetically active counter elements 14 are arranged on the basic body of the tensioning clamp, the adjustment of which can be carried out in a similar manner as described in FIG. 2 for setting the air gap.
  • the brushes 10 are in this case attached to the main body 4 of the tensioning clamp and thus constantly stroke the magnet 8.
  • a suction device 11 is also mounted within the guide rail 2.
  • this has a section in the row of magnets 8.
  • the magnets themselves can in turn be designed as a permanent magnet or electromagnet. In the case of using electromagnets, power is supplied to the magnets 8 in the fixed guide rail via a power supply system 12 connected to the controller 13.

Landscapes

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

Abstract

Dans les installations d'étirage transversal de feuilles continues, des pinces de serrage (1) dotées de galets de roulement (7) se déplacent sur des rails de guidage (2). À des vitesses de travail assez élevées surviennent des vibrations, du bruit, de l'usure et des pertes par frottement. Pour les éviter, selon l'invention, on dispose des aimants permanents ou des électroaimants (8) dans la zone occupée par les galets de roulement (7), sur la pince de serrage (1) ou sur le rail de guidage (2), de telle sorte que la pince de serrage (1) soit attirée dans une direction définie vers le rail de guidage (2). Cela stabilise le déplacement de la pince de serrage (1) sur le rail de guidage (2) et permet d'obtenir des vitesses de travail élevées dans des dispositifs d'étirage transversal de feuilles continues.
EP09737740A 2008-04-30 2009-04-25 Dispositif d'étirage transversal de feuilles continues Withdrawn EP2296864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810021506 DE102008021506A1 (de) 2008-04-30 2008-04-30 Vorrichtung zum Querrecken von Folienbahnen
PCT/DE2009/000591 WO2009132632A1 (fr) 2008-04-30 2009-04-25 Dispositif d'étirage transversal de feuilles continues

Publications (1)

Publication Number Publication Date
EP2296864A1 true EP2296864A1 (fr) 2011-03-23

Family

ID=40942521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09737740A Withdrawn EP2296864A1 (fr) 2008-04-30 2009-04-25 Dispositif d'étirage transversal de feuilles continues

Country Status (5)

Country Link
EP (1) EP2296864A1 (fr)
JP (1) JP2011518695A (fr)
CN (1) CN102015253A (fr)
DE (1) DE102008021506A1 (fr)
WO (1) WO2009132632A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5462678B2 (ja) * 2010-03-23 2014-04-02 株式会社日立製作所 シート状物の延伸機
JP5344705B2 (ja) * 2010-03-24 2013-11-20 株式会社日立製作所 シート状物の延伸機
DE102010023347A1 (de) 2010-06-10 2011-12-15 Brückner Maschinenbau GmbH & Co. KG Vorrichtung zum Recken einer bewegten Materialbahn, insbesondere Folienreckanlage
CN103687714A (zh) * 2011-06-10 2014-03-26 台斯尔技术公司 用于拉伸薄膜的夹具
CN102294668A (zh) * 2011-09-01 2011-12-28 江苏赛得机械有限公司 塑料双向拉伸格栅网夹具
CN102717511B (zh) * 2012-06-19 2015-06-03 广州华新科实业有限公司 双向拉伸薄膜捆绑式横向拉伸方法与装置
CN102765191B (zh) * 2012-08-04 2014-04-23 青岛顺德塑料机械有限公司 Bopet双向控制拉伸片材专用滑动座
EP2803473B1 (fr) * 2013-05-16 2016-04-13 Andritz AG Ensemble de deux pinces de rame et de deux tables et installations d'étirage de feuille transversal comprenant celui-ci
CN103395196B (zh) * 2013-08-12 2015-12-16 桂林电器科学研究院有限公司 薄膜拉伸生产线横拉机的磁控开闭夹装置
DE102017117420A1 (de) 2017-08-01 2019-02-07 Brückner Maschinenbau GmbH & Co. KG Reckanlage
CN107457977A (zh) * 2017-08-24 2017-12-12 王旭 一种横拉铗子
DE102019127701A1 (de) 2019-10-15 2021-04-15 Brückner Maschinenbau GmbH & Co. KG Kluppenwagen für eine Transportkettenanordnung einer Reckanlage sowie eine zugehörige Reckanlage

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Publication number Priority date Publication date Assignee Title
US4050124A (en) * 1975-07-30 1977-09-27 Eastman Kodak Company Web stretching apparatus
JPS5761528A (en) * 1980-10-01 1982-04-14 Kobe Steel Ltd Stretching device of plastic film etc.
CN85108666A (zh) * 1985-11-26 1987-06-03 普罗克特-施瓦茨有限公司 展幅机框幅固夹链条组件
DE3703097C1 (de) 1987-02-03 1988-01-21 Dornier Gmbh Lindauer Kluppenkettenbahn fuer endlos umlaufende Spannkluppen in Spannrahmen
DE4006440A1 (de) 1990-03-01 1991-09-05 Brueckner Maschbau Vorrichtung zum breitstrecken sowie fixieren von folienbahnen
GB9024732D0 (en) * 1990-11-14 1991-01-02 Ici Plc Stenter
CN1048680C (zh) * 1993-09-01 2000-01-26 坂东化学株式会社 膜片宽化方法及其装置
DE19510141C1 (de) * 1995-03-21 1996-08-14 Brueckner Maschbau Transportvorrichtung für eine bewegte Materialbahn, insbesondere eine Reckanlage für Kunststoffolien-Bahnen
DE19515036A1 (de) * 1995-04-24 1996-10-31 Brueckner Maschbau Transportvorrichtung sowie zugehörige Führungsschiene

Non-Patent Citations (1)

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Title
See references of WO2009132632A1 *

Also Published As

Publication number Publication date
CN102015253A (zh) 2011-04-13
WO2009132632A1 (fr) 2009-11-05
DE102008021506A1 (de) 2009-11-05
JP2011518695A (ja) 2011-06-30

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