WO2008119570A2 - Dispositif pour aplatir un film tubulaire - Google Patents

Dispositif pour aplatir un film tubulaire Download PDF

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Publication number
WO2008119570A2
WO2008119570A2 PCT/EP2008/002751 EP2008002751W WO2008119570A2 WO 2008119570 A2 WO2008119570 A2 WO 2008119570A2 EP 2008002751 W EP2008002751 W EP 2008002751W WO 2008119570 A2 WO2008119570 A2 WO 2008119570A2
Authority
WO
WIPO (PCT)
Prior art keywords
film tube
film
guide elements
tube
layers
Prior art date
Application number
PCT/EP2008/002751
Other languages
German (de)
English (en)
Other versions
WO2008119570A3 (fr
Inventor
Dirk Schmidt
Metin Arcan
Thomas Niebrügge
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 WO2008119570A2 publication Critical patent/WO2008119570A2/fr
Publication of WO2008119570A3 publication Critical patent/WO2008119570A3/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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/10—Bending or folding of blown tubular films, e.g. gusseting
    • 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
    • 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
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7128—Bags, sacks, sachets

Definitions

  • the invention relates to a device for flattening a film tube to a flat material according to the preamble of claim 1.
  • Such a device is already in use. It often serves the purpose of bringing a film tube which has just been extruded from a circular nozzle and therefore likewise has a circular cross-section to transportable dimensions. Therefore, the device mentioned above is often downstream of said extrusion die, wherein the distance between the extrusion die and the device should be so large that the film tube has sufficiently solidified on the way therebetween, such as by cooling.
  • the device for flattening the film tube generally comprises a plurality of roof-shaped film guide elements, which in
  • These film guide elements often consist of a plurality of rods, rods, strips or the like, which are arranged orthogonal to the transport direction of the film tube. In the transport direction of the film tube several rods are arranged one behind the other. These rods can, for example, with their ends in one
  • Two such frames or racks can be arranged roof-shaped to each other, so that the opposing rods or rods have a decreasing distance from each other and thus specify the path of the film tube and limit increasingly.
  • a frame with rods or rods may also comprise other suitable elements, for example roof-shaped plates.
  • the material can only laterally, ie only in the direction along the limited Rsumcs Susvvsich ⁇ n, so that the Füii ⁇ nschiauüh gradually changed to a flat material with two superimposed material webs.
  • the device for flattening a film tube is often followed by a so-called pair of nip rollers, which prevents air from being trapped between the two layers of the flat material.
  • the flat material produced in this way can later be wound up into a winding, transported away and fed to a further use.
  • the films thus produced are often used for the manufacture and filling of sacks. It is advantageous if the bags used include gussets. It is advisable to introduce these gussets already during the described Flachlegens the film tube in this.
  • the facilities mentioned above are equipped with means for inserting gussets. These work quite similar to the device for flattening the film tube. Instead of a plane to which the film tube is guided, such means generally define a line along which the film tube slides. This line defines the later inner fold edge, which connects the two layers of inwardly directed gussets.
  • the means for laying gussets can be formed by longitudinal edges of plate or board-shaped elements. But there are also other means are conceivable, which are suitable for the insertion of gussets, such as rods or rotating thin discs.
  • the width of the two layers forming a gusset may differ from each other.
  • the Widths of the outer material layers be different. In other words, the respective corresponding edges of the two outer layers are not or only partially on top of each other.
  • the object of the present invention is to improve a known device for laying flat of a film tube, so that the respective corresponding edges of the two outer layers are superimposed as possible.
  • the object is achieved by a device according to the preamble of claim 1, which additionally comprises the features of the characterizing part of claim 1.
  • side limiting means are provided, which are laterally adjustable to the already largely flattened film tube.
  • the Foiienschiauch which has not been completely flattened, so that the edges have not yet been kinked.
  • the edges that protrude beyond the desired edge are pushed back in this way.
  • the pushed back material shifts so that The margins that still do not touch the side boundary means get material so that these margins will also end up being the side boundary center! touch.
  • the edges of the two outer film layers have been brought one above the other, so that the final flattening, which is done by the so-called Abquetschab or pair of withdrawal rollers, can be performed.
  • FIG. 1 View of a blown film extrusion plant with a device for
  • FIG. 3 View according to III-IM in FIG. 2, but without side fold limiter
  • FIG. 4 View according to III-III in FIG. 2
  • FIG. 5 View according to V-V in FIG. 2
  • FIG. 1 shows a blown film extrusion plant 1 known per se.
  • the resulting mass is fed via a connecting line 14 to the blowing head 5, which forms a film tube 6.
  • the film tube 6 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 6 is expanded immediately after leaving the Blaskopfes 5.
  • the diameter of the film tube 6 is limited by the calibration 20. After leaving the Kalibrierkorbes 20 of the film tube 6 passes into a flattening device 21, in softening the film tube is almost formed into a double-layered film web.
  • the film tube 6 is guided between pairs of film guide elements 13, which are arranged on roof-shaped plates or carriers 7 employed to each other, so that they 13 in the course the transport direction Z take an ever smaller distance from each other.
  • the film tube 6 having a round cross section in the region of the chewing basket 20 is flattened on a plane 19 (see FIGS. 3 and 4) which runs through the film tube central axis 18 and represents the plane of symmetry for the two plates or carriers 7 of the flattening unit. in the view shown in FIG. 1, this plane therefore projects perpendicularly out of the plane of the paper. In Fig. 2, this plane is parallel to the paper plane.
  • the film tube 6 After passing through the flattening device 21, the film tube 6 reaches the squeezing device 24.
  • the film tube 6 is first fed to the pre-squeezing 22, which consists of a pair of pre-squeezing rollers 16.
  • the complete flattening is done by the squeeze 23, which consists of a pair of squeezing rollers 17.
  • the squeeze 23 which consists of a pair of squeezing rollers 17.
  • it can also be dispensed with the pre-squeezing and the squeezing rollers 17 are arranged in place of the squeezing rollers 16.
  • the film web 6 can now be guided by a reversing device, not shown, or, as in the case of the device shown, are fed directly via deflecting rollers 10 a winding device 11, where the film web 6 is processed into a winding 12.
  • FIG. 2 shows a view of the section II - II from FIG. 1, wherein the calibration basket and the flattening device are not shown in greater detail.
  • two devices for inserting gussets are shown, which are referred to below as gussets 25.
  • the side fold boards 25 are movable relative to the flat laying device, for example displaceable along the double arrows A.
  • the side gussets 25 are similar to the plates or support 7 obliquely placed in order to insert the gussets gradually in the film tube 6, without this takes damage due to sudden deformation.
  • FIG 3 is a plan view of the already almost flattened film tube with gussets to see.
  • the film tube 6 comprises in This moment two outer layers of material or outer walls 30, 31, the edges or edges 32, 33 have. Each two mutually associated edges 32 and 33 are connected by gussets, each comprising two further layers of material 34, 35, which are each again connected by a common inner edge 36, in the figure 3 is a Foiienschiauch 6 can be seen, with a conventional Device for flattening a film tube is made.
  • the two layers of material 30, 31 are slightly shifted from each other, as it is illustrated by the arrows Y and Y '.
  • the edges 32 and 33 can be shifted from each other. It is therefore often not with the desired security a flattened gusseted hose produced whose outer walls have the same dimensions and / or having the desired symmetry.
  • FIG. 4 shows a device according to the invention with which, as tests have shown, this problem can be solved.
  • this figure shows the gusset limiters 40.
  • These gusset limiters 40 and the guide elements 13 determine the position of the material layers 30, 31 in the direction X and the extent and the spatial position of these material layers in the direction Y. In particular, this is achieved in that the edges 32 and 33 respectively assume the same positions in the direction Y.
  • the material layers 34, 35 also have predefined dimensions and spatial positions.
  • the gusset limiters 40 are advantageously tubes or rods with a round cross section to avoid damage to the film. Also, an angular cross-section (as shown in FIG. 2) is conceivable. However, other shapes are conceivable, such as sheets or plates, which may include, in particular on the inlet side of the film bends for said avoidance of damage.
  • the gusset limiters 40 may be made of a suitable material, such as wood, metal or plastic, with wood being a preferred material. As can be seen from FIG. 2, the gusset limiters 40 can be displaced in the direction Y in order to be able to be adjusted to the film. On the one hand, this Anstii ashamed serves to adapt to different formats of the (later) gusseted tube, on the other hand, in this way, the contact force can be varied, for example, to be able to influence thicker films in the desired manner.
  • the gusset limiters 40 are also displaceable in the direction X in order to be able to remove them at short notice if required.
  • FIG. 5 shows the view V - V in FIG. 2, the flattening device 21 with the carriers 7 and the guide elements 13 being shown again.
  • the gusset limiters 40 are arranged in the vicinity of the squeeze rolls 17 between guide elements 13 of the flat laying device 21.
  • a bracket 41 is attached to the support 7 and carries a rail 42 along which the gusset limiters 40 are slidable in the direction Y (see Figure 2).
  • This shift takes place in an advantageous embodiment by means of a drive.
  • This drive can be a pneumatic drive, for example a pneumatic piston, an electric motor-driven spindle-nut combination or an electric linear drive.
  • the bracket 41 may also be arranged on a support frame, not shown, which also carries the carrier 7 of the flattening device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention concerne un dispositif pour aplatir un film tubulaire (6,9) qui comporte deux couches de matériau (30, 31) superposées dont les bords sont reliés par au moins deux autres couches de matériau (34, 35) qui forment des plis latéraux, le dispositif présentant les caractéristiques suivantes : une pluralité d'éléments de guidage de film (13) disposées en forme de toit et définissant au moins deux plans orientés l'un vers l'autre qui réduisent la place disponible pour le film tubulaire dans le sens de transport (Z) du film tubulaire (6,9), de manière à ce que celui-ci présente deux couches de matériau superposées après le passage par les éléments de guidage de film (13). Ledit dispositif comporte également au moins deux moyens pour former des plis latéraux dans le film tubulaire, ces moyens étant disposés entre les éléments de guidage de film (13) et présentant entre eux un écartement s'effilant dans le sens de transport (Z) du film tubulaire. L'invention est caractérisée en ce que des moyens de limitation latérale (40) peuvent être posés latéralement contre le film tubulaire déjà en grande partie aplati.
PCT/EP2008/002751 2007-04-03 2008-04-02 Dispositif pour aplatir un film tubulaire WO2008119570A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007016362.4 2007-04-03
DE102007016362 2007-04-03
DE102007029794.9 2007-06-27
DE102007029794A DE102007029794B4 (de) 2007-04-03 2007-06-27 Einrichtung zum Flachlegen eines Folienschlauches zu einem Flachmaterial

Publications (2)

Publication Number Publication Date
WO2008119570A2 true WO2008119570A2 (fr) 2008-10-09
WO2008119570A3 WO2008119570A3 (fr) 2008-12-04

Family

ID=39736327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/002751 WO2008119570A2 (fr) 2007-04-03 2008-04-02 Dispositif pour aplatir un film tubulaire

Country Status (2)

Country Link
DE (1) DE102007029794B4 (fr)
WO (1) WO2008119570A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110404990A (zh) * 2019-08-14 2019-11-05 山东广泰环保科技有限公司 一种压管设备、复合管拉拔设备及拉拔工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012017433A1 (de) 2012-09-04 2014-04-03 Reifenhäuser GmbH & Co. KG Maschinenfabrik Faltschwert für eine Blasfolienanlage sowie Blasfolienanlage mit einem solchen Faltschwert

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544044A (en) * 1948-07-14 1951-03-06 Plax Corp Apparatus and method for producing gusseted plastic tubing
US2631332A (en) * 1951-05-22 1953-03-17 Plax Corp Internal spreader for gusseting layflat tubing
GB758484A (en) * 1954-03-03 1956-10-03 British Cellophane Ltd Improvements in or relating to apparatus for forming continuous lengths of thin-walled, pleated, seamless tubes of flexible organic material
GB992559A (en) * 1961-05-02 1965-05-19 Alfred Windmoller An improved mechanism for forming re-entrant lateral folds in seamless flexible tubing
US3291007A (en) * 1964-02-28 1966-12-13 Olin Mathieson Anti-friction former device
EP0183244A1 (fr) * 1984-11-27 1986-06-04 Windmöller & Hölscher Dispositif pour former des plis latéraux dans des films tubulaires en plastique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343583A1 (fr) * 1976-03-12 1977-10-07 Gen Electric Appareil pour la formation de films thermoplastiques par la methode du tube souffle
DE3937772A1 (de) * 1988-11-17 1990-05-23 Barmag Barmer Maschf Vorrichtung zum einlegen von seitenfalten in kunststoffschlauchfolie
DE102004017952B4 (de) * 2004-04-14 2009-04-09 Windmöller & Hölscher Kg Vorrichtung zum Transport eines Folienschlauches

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2544044A (en) * 1948-07-14 1951-03-06 Plax Corp Apparatus and method for producing gusseted plastic tubing
US2631332A (en) * 1951-05-22 1953-03-17 Plax Corp Internal spreader for gusseting layflat tubing
GB758484A (en) * 1954-03-03 1956-10-03 British Cellophane Ltd Improvements in or relating to apparatus for forming continuous lengths of thin-walled, pleated, seamless tubes of flexible organic material
GB992559A (en) * 1961-05-02 1965-05-19 Alfred Windmoller An improved mechanism for forming re-entrant lateral folds in seamless flexible tubing
US3291007A (en) * 1964-02-28 1966-12-13 Olin Mathieson Anti-friction former device
EP0183244A1 (fr) * 1984-11-27 1986-06-04 Windmöller & Hölscher Dispositif pour former des plis latéraux dans des films tubulaires en plastique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110404990A (zh) * 2019-08-14 2019-11-05 山东广泰环保科技有限公司 一种压管设备、复合管拉拔设备及拉拔工艺

Also Published As

Publication number Publication date
DE102007029794B4 (de) 2009-08-27
DE102007029794A1 (de) 2008-10-09
WO2008119570A3 (fr) 2008-12-04

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