EP2441574B1 - Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires - Google Patents

Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires Download PDF

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Publication number
EP2441574B1
EP2441574B1 EP10187549.0A EP10187549A EP2441574B1 EP 2441574 B1 EP2441574 B1 EP 2441574B1 EP 10187549 A EP10187549 A EP 10187549A EP 2441574 B1 EP2441574 B1 EP 2441574B1
Authority
EP
European Patent Office
Prior art keywords
bag body
spreading tool
end region
corner flap
transporting
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.)
Active
Application number
EP10187549.0A
Other languages
German (de)
English (en)
Other versions
EP2441574A1 (fr
Inventor
Hannes Grill
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.)
Starlinger and Co GmbH
Original Assignee
Starlinger and Co 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.)
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Publication date
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Application filed by Starlinger and Co GmbH filed Critical Starlinger and Co GmbH
Priority to ES10187549T priority Critical patent/ES2424952T3/es
Priority to EP10187549.0A priority patent/EP2441574B1/fr
Priority to PCT/EP2011/067329 priority patent/WO2012049040A1/fr
Priority to CN201180049808.3A priority patent/CN103153599B/zh
Priority to BR112013009006-5A priority patent/BR112013009006B1/pt
Priority to MX2013003146A priority patent/MX2013003146A/es
Priority to RU2013121833/12A priority patent/RU2543423C2/ru
Priority to MYPI2013000880A priority patent/MY155933A/en
Publication of EP2441574A1 publication Critical patent/EP2441574A1/fr
Priority to ZA2013/01974A priority patent/ZA201301974B/en
Publication of EP2441574B1 publication Critical patent/EP2441574B1/fr
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/52—Folding sheets, blanks or webs by reciprocating or oscillating members other than plungers and dies, e.g. by fingers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • B31B2150/0014—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom having their openings facing transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B31B2160/102—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from essentially rectangular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags

Definitions

  • the invention relates to a method and a device for forming open trays at open end regions of tubular bag bodies, which bag bodies are preferably made of a fabric of stretched plastic tapes, according to the preambles of claims 1 and 10.
  • Chest bags also called cross-bottom bags, are sacks of parallelepiped shape, which are manufactured in bag making machines by providing tubular bag bodies whose open end portions are folded into cross bottoms. The bag bodies are guided lying flat through the clothing plant, so that two layers of the tubular bag body abut each other. For bottom formation, the two layers are separated at the end regions of the tubular bag body and one of the two layers is folded over as a side flap by 180 ° to itself, creating an open bottom, in which the other layer forms a second side flap. By folding a layer at the end of the tubular bag body is formed at the front and rear of this end portion each have a triangular envelope. This process is called in the jargon also "Hommeteil”.
  • valve leaflets can be inserted (for the production of "box valve sacks" which can be filled with filler through the valve) and the final bottom configuration is produced by overlapping the bottom side flaps.
  • the overlapping bottom side flaps are glued together or thermally welded depending on the material of the bag body.
  • bottom cover sheets can be placed on the overlapped bottom side flaps and glued or welded to them.
  • the quality of a box bag depends essentially on the geometrically exact design of the floors. This means that the triangular corner envelopes must approximate as closely as possible the shape of an isosceles triangle, because only then is it possible to form bottom side flaps whose side edges are in the state of the open bottom parallel to a ground center line and thus parallel to each other. Only when the bottom side flaps have these parallel to the ground center line extending side edges, it is again possible to strike them overlapping each other parallel to the ground center line. And only if the turning of the Bodenrawklappen is geometrically accurate, the finished sack bottom has a rectangular shape, which makes the bag well processed and stackable. Warped floors often have poor tightness and strength.
  • the corner envelopes are formed by the folding of a bottom side flap, however, do not always have the desired exact shape due to the geometrically indeterminate starting position, so that the further processing of the bag floor by inserting Ventilzetteln, wrapping the Bodenendklappen and connecting to a ground cover sheet is difficult.
  • the present invention achieves this object by providing a method for forming open trays at open end portions of tubular bag bodies, wherein the bag bodies are transported flat in a transport direction transversely to their longitudinal extent at a transport speed and during opening the end portions of the tubular bag bodies to be folded are opened , according to the features of claim 1.
  • the present invention also achieves this object by providing a device for forming open trays at open end regions of tubular bag bodies, wherein the bag body flat transported in a transport direction transversely to its longitudinal extent at a transport speed and opened during transport to the folding end portions of the tubular bag body are, according to the features of claim 10.
  • the method according to the invention and the device according to the invention are particularly suitable for processing bag bodies made of stretched plastic tapes.
  • the plastic tapes may be made of polyethylene or polypropylene and optionally provided with a plastic coating.
  • the stretched fabric web may be provided with a plastic coating to achieve the tightness of the fabric, to improve printability, and to adjust other desirable properties.
  • Bags of stretched plastic tape have superior strength over paper or plastic film bags, but tend to slip in the manufacturing process and are also harder to fold than, for example, paper. Therefore, it is of particular advantage that these bag bodies can be handled by the present invention. According to the invention, but also bag body made of plastic film or other materials or composite materials are processed.
  • bottoms are formed at both end regions of the tubular bag body.
  • the bag body is transported lying flat in a transport direction transversely to its longitudinal extent at a transport speed and during transport opened to be folded end portion of the tubular bag body.
  • a spreading tool is inserted into the open end region of the tubular bag body.
  • the spreading tool is moved in the transport direction at a speed which is increased relative to the transport speed until the spreading tool runs against the inside of the tubular bag body at the front part of the opened end region with at least two front contour points defined on the spreading tool and thereby said front part a front corner envelope in the form of a substantially isosceles triangle spreads, each leg of the front triangular Eckumschlags rests against at least one front contour point of the expansion tool. Then, the spreading tool is moved out of the front corner envelope by relatively delaying its movement relative to the transport speed, and the generated front corner envelope is pressed.
  • the spreading tool is designed as a split tool, wherein two plates or rods are mounted on one arm, which leave a distance between each other, so that the pressing device protrudes through the distance in the spreading tool or can be passed without colliding.
  • the spreading tool runs in a translational movement in the transport direction against the inside of the tubular bag body.
  • a device according to the invention for forming an open bottom at an open end region of a tubular bag body comprises a transport device for transporting the bag body in a flat state in a transport direction transversely to its longitudinal extent at a transport speed, and an opening device for opening the foldable end portions of the tubular bag body during their Transport on the transport device.
  • the apparatus further comprises a spreading tool, which is insertable into the open end region of each tubular bag body during its transport on the transport device, wherein the spreading tool is movable in the transport direction at a speed increased relative to the transport speed until it - seen in the transport direction - the front part reached the open end region and with at least two am Spreading tool defined front contour points runs against the inside of the tubular bag body and spreads said front part to a front corner envelope in the shape of a substantially isosceles triangle, each leg of the front triangular Eckumschlags rests against at least one front contour point of the spreading tool, and wherein the spreading tool the front corner envelope is moved out by relative delaying its movement relative to the transport speed.
  • the device further comprises a pressing device for pressing the generated front corner envelope.
  • the spreading tool is designed as a split tool, wherein two plates or rods are mounted on one arm, which leave a distance between each other, so that the pressing device protrudes through the distance in the spreading tool or can be passed without colliding.
  • the spreading tool runs in a translational movement in the transport direction against the inside of the tubular bag body.
  • a further improvement of the exact definition of the desired geometric shape of the open bottom can be achieved according to the invention, when the spreading tool is moved in the open end region of the tubular bag body in the transport direction with a reduced or negative speed relative to the transport speed, until it is the rear one, viewed in the direction of transport Achieved part of the open end portion and runs with at least two defined on Sp Dahltechnikmaschinegne rear contour points against the inside of the tubular bag body and spreads said rear part to a rear corner envelope in the form of a substantially isosceles triangle, each leg of the rear triangular Endumschlags at least one rear Contour point of the spreading tool rests.
  • the spreading tool is moved out of the rear corner turn by relatively accelerating its movement against the conveying speed, and the generated rear corner turn is pressed by a pressing means.
  • bottom side flaps are formed from the tube layers at the open end region, which extend on opposite sides of a bottom center line, whereby the formation of the opened bottom is completed geometrically determined and the bag body can be transferred in this configuration to further processing stations.
  • a bottom side flap of the open end portion may be formed by folding a first tube layer onto itself along a fold line extending in the direction of transport, and forming the other bottom side flap from a second tube layer by folding this second tube layer into the plane of the flat bag body becomes.
  • the open bottom is again in the plane of the bag body, which greatly facilitates the pressing and transport to other processing stations.
  • the spreading tool is guided away from the end region of the bag body after the formation of the front triangular corner envelope and optionally also of the rear triangular corner envelope, so that the bag body can be transported further unhindered. It is particularly preferred if the spreading tool is moved away only after the fixation of the tip of the front Eckumschlags by a pressing device from the front corner envelope of the bag body. In this way it is reliably prevented that the front corner envelope begins to unfold after or even while the spreading tool moves out of the front corner envelope. This feature is particularly useful for bag bodies of slipping and unfolding material, such as e.g. Plastic film or woven plastic tape, especially useful.
  • the present invention it is possible with the present invention to form exact front and rear corner envelopes, even if the expansion tool rests with only one contour point on each leg of the corner envelopes.
  • the method according to the invention will be more stable in hard production operation if the spreading tool is equipped with front contour lines and, optionally, rear contour lines for the formation of the rear corner turn. These contour lines define portions of the legs of the front triangular corner envelope and optionally also portions of the legs of the rear triangular corner envelope, wherein the contour lines may extend over the entire length of the legs.
  • the opening device comprises suction devices which can be switched on and off in each case to a tube layer at the end region of the tubular bag body, and can be moved away from one another at the same time as transport speed in the transverse direction of the transport direction, after contact with the respective tube layer and activation of the suction effect Transport direction are movable.
  • suction devices which can be switched on and off in each case to a tube layer at the end region of the tubular bag body, and can be moved away from one another at the same time as transport speed in the transverse direction of the transport direction, after contact with the respective tube layer and activation of the suction effect Transport direction are movable.
  • Such opening device works very reliable and low maintenance. It has proved to be favorable for highly reliable opening operations when the center axes of the suction devices in the transport direction T congruent or successively offset, preferably offset.
  • the spreading tool has an arm and plates and / or bars mounted on this arm, on which the front contour points or contour lines and optionally also the rear contour points or contour lines are defined.
  • the plates and / or bars may each be specially adapted to particular bag proportions or materials. It is further preferred if the plates and / or bars are arranged symmetrically to the transport direction, because this automatically enforced that the formed corner envelopes are aligned symmetrically to the transport direction.
  • the spreading tool is mounted on a rotating drive, for example, oriented in the transport direction toothed belt or chain drive, the rotating drive is accelerated and delayed relative to the transport speed, realizes a very reliable and low-maintenance drive, with the main drive, the for the Transport the bag body is responsible, can be synchronized.
  • the spreading tool is formed as a split tool, so that the pressing device protrudes into the spreading tool or can be passed without colliding with it, the pressing of the corner envelope can already begin while the spreading tool is still in the corner envelope.
  • the pressing device fixes the corner envelope against unfolding and warping.
  • the pressing device expediently comprises compression belts, pressure rollers and / or contact sliding elements.
  • FIGS Fig. 1 to Fig. 6 explained process steps explained.
  • the method proceeds in a device 1 according to the invention for forming an open bottom at an open end region of a tubular bag body, which is referred to below as a bottom opening device 1. From this bottom opening device 1 are in Fig. 1 to Fig. 6 for clarity, only the features essential to the invention shown. Parts of the bottom opening device 1, which have nothing to do with the invention or are familiar to those skilled in the art, have been omitted from the drawings.
  • the bottom opening device 1 has a transport device 2 in the form of a conveyor belt and moves continuously with a transport speed V in a transport direction T.
  • a transport device 2 in the form of a conveyor belt and moves continuously with a transport speed V in a transport direction T.
  • tubular bag bodies 10 in flat lying state with their longitudinal extent L transversely to the transport direction T.
  • the bag body 10 are on secured to the conveyor belt by means not shown holding means against slipping.
  • Such holding means include, for example, strips of ferromagnetic material, which are placed on the bag bodies 10 and of the Bottom of the conveyor belt with magnets that move together with the conveyor belt, are attracted to the conveyor belt and thereby press the intermediate bag body 10 to the conveyor belt.
  • the conveyor belt is formed as a perforated conveyor belt, wherein from the underside of the conveyor belt, a vacuum is applied, which sucks the bag body 10 to the conveyor belt.
  • the tubular bag body 10 are made for example of fabric of stretched plastic tape.
  • the plastic tapes may comprise a polyethylene or polypropylene material.
  • the fabric has a plastic coating.
  • the tubular bag body 10 may alternatively be made of plastic film.
  • the tubular bag body 10 has two opposing open end portions 10e, 10f.
  • the end portion 10e is to be formed into a cross bottom, as explained below.
  • the end portion 10f may also be formed into a cross bottom in the same manner as the end portion 10e, thereby producing a box bag or box valve bag.
  • Fig. 1 It can be seen that the tubular bag body 10 initially rests flat on the transport device 2 in a first plane ⁇ 1. In this flat lying state, a first and a second tube layer 10a, 10b abut each other. Then, the end portion 10e of the tubular bag body 10 is brought by means of a folding bar 12, which is referred to in the jargon as "Vorbruchelf", and baffles 11a, 11b from the first level ⁇ 1 of the flat bag body in a substantially orthogonal thereto extending second level ⁇ 2.
  • a folding bar 12 which is referred to in the jargon as "Vorbruchelf"
  • baffles 11a, 11b from the first level ⁇ 1 of the flat bag body in a substantially orthogonal thereto extending second level ⁇ 2.
  • FIG. 2 shows the bag body 10 with fully orthogonal upward (in the second level ⁇ 2) folded end portion 10e.
  • the folding bar 12 continues in the transporting direction T and, in cooperation with the deflecting plate 11a, now has the task of holding the end region 10e of the bag body 10 folded in the second plane ⁇ 2 in this angular position relative to the first plane ⁇ 1 in which the bag body 10 lies ,
  • a generally designated by the reference numeral 20 opening means comprises two suction devices 13, 14 which are reciprocally transversely to the transport direction T on symbolically shown cross members 15, 16.
  • the cross members 15, 16 may be formed, for example, as rails or pivot arms.
  • cross members 15, 16 piston-cylinder assemblies, wherein the suction means 13, 14 sit at the free ends of the piston and in such a way transversely to the transport direction T back and forth.
  • the cross members 15, 16 are movable by means of longitudinal members 17, 18 in the transport direction T with the transport speed V.
  • the longitudinal members 17, 18 may be formed, for example, as rails, pivot arms or piston-cylinder arrangements. The exact design of cross members and side members does not matter; It is only essential that the suction devices 13, 14 are movable both transversely to the transport direction T and in the transport direction T.
  • Fig. 2 a method step is shown, in which the two suction devices 13, 14 have been brought into contact with the first tube layer 10a or the second tube layer 10b from opposite sides in the end region 10e.
  • a vacuum is switched on so that the first suction device 13 sucks in the first tube layer 10a and the second suction device 14 sucks in the first tube layer 10b.
  • the suction devices 13, 14 move synchronously with the transport device 2 at the transport speed V in the transport direction T, so that no distortion of the tube layers 10a, 10b can occur.
  • the two suction devices 13, 14 start to move away from one another transversely to the transport direction V (arrows P1 and P2), thereby pulling a tube layer 10a, 10b with them and thereby open the end region 10e of the tubular bag body 10.
  • Fig. 3 shows the end portion 10e of the tubular bag body 10 in the open state, in which between the tube layers 10a, 10b, a free space 10g is formed. It can also be seen in this illustration that meanwhile the vacuum has been switched off by the suction devices 13, 14 and the two suction devices 13, 14 have disengaged from the tube layers 10a, 10b and can therefore be moved upstream against the transport direction T to open the end of the next bag body. It can also be seen in this illustration that the open end region 10e has a geometrically largely undefined shape. Now, a spreading tool 21 is inserted into the clearance 10g of the opened end portion 10e, whereby the spreading tool 21 moves in a circular arc (arrow P3) into the opened end portion 10e.
  • the sheet movement of the spreading tool 21 has a directed in the transport direction T movement component with respect to the transport speed V higher relative speed V1R.
  • the spreading tool 21 is driven by one or more parallel rotating toothed belt or one or more parallel rotating roller chains, the toothed belt 25 or the chain is respectively aligned by at least 2 pulleys or sprockets 26, 27 in the transport direction T.
  • the bottom opening device is thus formed from one or more, preferably two spreading tools, wherein the distance between the spreading tools can be variable by separate drive units.
  • one of the pulleys 26, 27 is connected to a controllable drive, so that synchronized with the clock in which the bag body 10 run through the bottom opening device 1, the spreading tool with respect to the transport speed V can be accelerated and delayed.
  • the spreading tool 21 spreads the front part 10v to a front corner turn 10j having the shape of a substantially isosceles triangle.
  • the legs 10k, 10m of the front triangular corner turn 10j are defined by at least one front contour point of the expansion tool abutting against it.
  • both the front contour points 23p, 24p and the front contour lines 23v, 24v of the spreading tool 21 rest on the legs 10k, 10m.
  • the isosceles triangle is a right-angled isosceles triangle.
  • Fig. 4 shows the state in which the front corner envelope 10j has been completely formed by the spreading tool 21.
  • *** It can also be seen in this illustration that the isosceles triangular shape of the front corner impact 10j is positioned symmetrically to a center line M of the opened end portion 10e.
  • the spreading tool 21 forms the front triangular Eckumschlag 10j, it folds at the same time a front portion of the first tube layer 10a around the folding bar 12 around back on itself, so that this area of the tube layer 10a is again in the first level ⁇ 1.
  • the spreading tool 21 folds a front region of the second tube layer 10b into its original position into the first plane ⁇ 1. In this way, the formation of the bottom side flaps 10u, 10t from the two tube layers 10a, 10b is started.
  • the spreading tool 21 is moved rearwardly out of the front corner envelope 10j by relative delaying its movement relative to the transport speed T, continuing the folding of the tube layers 10a, 10b and thus forming the bottom side flaps 10u, 10t from the two tube layers 10a, 10b progresses.
  • the tip 10s of the front corner envelope 10j has come to a pressing device 28, which initially holds the tip 10s and successively the entire front corner envelope 10j in the defined shape and prevents the Corner envelope 10j unfolded again.
  • the pressing device 28 is formed as a pressure belt 28 a, which is aligned in the transport direction T and rotates about two pulleys 28 b, 28 c, of which Fig. 3 to Fig. 6 only the rear pulley 28b is shown.
  • Fig. 10 but shows the complete pressing device 28.
  • Fig. 5 shows a process state in which the spreading tool 21 has been moved in the open end 10e of the tubular bag body 10 in the transport direction T with a relative to the transport speed V reduced or negative speed V2R until it - seen in the direction of transport T - the rear part 10h of has reached open end portion 10e and has accumulated with at least two defined on Sp Dahltechnikmaschinegne rear contour points 23q, 24q against the inside of the tubular bag body and thereby said rear portion 10h has spread to a rear corner envelope 10p in the form of a substantially isosceles triangle.
  • These rear contour points 23q, 24q represent end points of rear contour lines 23h, 24h of the spreading tool 21 (see FIG FIGS.
  • the isosceles triangle is a right-angled isosceles triangle. How to get out Fig. 5 can recognize, at this time, the formation of the two bottom side flaps 10u, 10t completed.
  • relative to the transport speed V reduced or negative speed V2R means that the spreading tool 21, although in the transport direction, but at a lower speed than the transport speed V is moved, or that the spreading tool is temporarily stopped, or that the spreading tool is moved counter to the transport direction T.
  • the spreading tool 21 is moved out of the rear corner turn 10p by relatively accelerating its movement V3R from the conveying speed T, to the pulley 27 where it moves in a circular arc movement to one of the end portion 10e is then brought back along the upper run of the toothed belt 25 to the open bottom of the subsequent bag body (or the next but two, if two spreading tools are provided, etc.) to form.
  • the spreading tool 21 is formed as a split tool, wherein on an arm 22, two plates 23, 24 are mounted, which leave a distance between each other 21 a. At edges of the plates 23, 24, the front and rear contour points 23p, 24p, 23q, 24q are defined, as well as the front and rear contour lines 23v, 24v, 23h, 24h.
  • the split shape of the spreading tool 21 allows the pressing device 28 to extend through the clearance 21a and thereby hold down and press the folded front and rear corner envelopes 10j, 10p and bottom side flaps 10u, 10t earlier than when collision to prevent with the spreading tool 21 - would have to be arranged further downstream of the spreading tool 21.
  • the first alternative spreading tool 30 differs from the spreading tool 21 in that only one plate 31 having edges, the front contour lines 31vl, 31vr and rear contour lines 31h1, 31hr is formed on the arm 22 define.
  • the spreading tool 30 is thus not a shared tool.
  • Figs. 9A and 9B show a second alternative embodiment of a spreading tool 32.
  • the second, alternative spreading tool 32 differs from the spreading tool 21 in that two obliquely directed rods 33, 34 are formed on the arm 22, whose tips define contour points 33p, 34p.
  • the rods 33, 34 are arranged at a distance 32a from each other. It is thus a split tool, wherein by the distance 32a a pressing device is guided. Since each bar 33, 34 defines only one contour point 33p, 34p, the second, alternative spreading tool 32 is suitable depending on the installation position only for producing a front or rear corner turn. To both the front To produce corner cover as well as the rear corner envelope, two second alternative spreading tools 32 must be combined, for example, by being mounted one behind the other and in the reverse installed position on the toothed belt 25.
  • Fig. 11 shows an alternative pressing device 35 in the form of a press shoe made of a material with good sliding properties with respect to the bag body.
  • Fig. 12 shows a further alternative pressing device 36 in the form of a rotatable pressure roller.

Claims (21)

  1. Procédé pour la réalisation d'un fond ouvert au niveau d'une zone terminale ouverte d'un corps de sac (10) en forme de tuyau, ledit corps de sac étant de préférence fabriqué à partir d'un tissu en bandelettes de matière plastique étirées ou à partir d'une feuille de matière plastique, dans lequel le corps de sac est transporté à plat dans une direction de transport (T) transversalement à son extension longitudinale (L) avec une vitesse de transport (V) et pendant le transport la zone terminale à plier (10e) du corps de sac en forme de tuyau est ouverte, comprenant les étapes consistant à
    introduire un outil d'écartement (21, 30, 32) dans la zone terminale ouverte du corps de sac en forme de tuyau,
    déplacer l'outil d'écartement en direction de transport (T) avec une vitesse (V1R) augmentée par rapport à la vitesse de transport (T), jusqu'à ce que l'outil d'écartement (21), au niveau de la partie antérieure (10v), vue en direction de transport, de la zone terminale ouverte, vienne s'engager contre la face intérieure du corps de sac en forme de tuyau avec au moins deux points de contour antérieurs définis sur l'outil d'écartement (23p, 24p ; 33p, 34p), et écarte ici ladite partie antérieure (10v) pour donner un rabat de coin antérieur (10j) sous la configuration d'un triangle sensiblement équilatéral, dans lequel chaque côté (10k, 10m) du rabat de coin antérieur triangulaire (10j) est appliqué sur au moins un point de contour antérieur (23p, 24p ; 33p, 34p) de l'outil d'écartement (21),
    déplacer l'outil d'écartement (21) hors du rabat de coin antérieur (10j) par ralentissement relatif de son mouvement par rapport à la vitesse de transport (V), et
    presser le rabat de coin antérieur engendré (10j),
    caractérisé en ce que
    l'outil d'écartement (21, 32) est réalisé comme un outil subdivisé, dans lequel deux plaquettes (23, 24) ou barrettes (33, 34) sont montées sur un bras (22), qui libèrent entre elles un intervalle (21a, 32a), de sorte que le moyen de pressage (28, 35, 36) pénètre dans ou peut être passé à travers l'outil d'écartement à travers l'intervalle (21a, 32a), sans entrer en collision avec celui-ci, et en ce que l'outil d'écartement (21, 32) vient s'engager contre la face intérieure du corps de sac en forme de tuyau dans un déplacement de translation en direction de transport (T).
  2. Procédé selon la revendication 1, caractérisé en ce que l'outil d'écartement (21, 30, 32) est déplacé dans la zone terminale ouverte (10e) du corps de sac en forme de tuyau (10) en direction de transport (T) avec une vitesse (V2R) réduite ou négative par rapport à la vitesse de transport (V) jusqu'à ce qu'il atteigne la partie postérieure (10h), vue en direction de transport, de la zone terminale ouverte, et vienne s'engager contre la face intérieure du corps de sac en forme de tuyau avec au moins deux points de contour postérieurs (23q, 24q ; 33p, 34p) définis sur l'outil écartement, et écarte ici ladite partie postérieure (10h) pour donner un rabat de coin postérieur (10p) sous la configuration d'un triangle sensiblement équilatéral, dans lequel chaque côté (10q, 10r) du rabat de coin triangulaire (10p) postérieur s'applique contre au moins un point de contour postérieur (23q, 24q ; 33p, 34p) de l'outil d'écartement,
    le procédé comprenant l'opération consistant à déplacer l'outil d'écartement (21, 30, 32) hors du rabat de coin postérieur (10p) par accélération relative de son mouvement par rapport à la vitesse de transport (V), et
    l'opération consistant à presser le rabat de coin postérieur (10p) engendré.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que des volets latéraux de fond (10u, 10t) sont formés au niveau de la zone terminale ouverte à partir des couches (10a, 10b) du tuyau, volets qui s'étendent sur des côtés opposés d'une ligne médiane (M) du fond.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que, avant l'ouverture de la zone terminale du corps de sac en forme de tuyau, cette zone terminale (10e) est amenée, le long d'une ligne de pliage s'étendant en direction de transport, hors du premier plan (ε1) du corps de sac disposé à plat jusque dans un second plan (ε2) s'étendant sensiblement perpendiculairement à celui-ci.
  5. Procédé selon la revendication 4, caractérisé en ce qu'un volet latéral de fond (10u) de la zone terminale ouverte est réalisé en repliant une première couche du tuyau (10a) sur elle-même le long d'une ligne de pliage s'étendant en direction de transport, et un autre volet latéral de fond (10t) est formé à partir d'une seconde couche du tuyau (10b), en repliant cette seconde couche de tuyau (10b) dans le plan du corps de sac disposé à plat (10).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'outil d'écartement (21, 30, 32), après la réalisation du rabat de coin triangulaire antérieur (10j) et en option également du rabat de coin triangulaire postérieur (10p), est mené en éloignement de la zone terminale (10e) du corps de sac.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que l'outil d'écartement (21, 30, 32) est mené en éloignement hors du rabat de coin antérieur (10j) du corps de sac uniquement après fixation de la pointe (10s) du rabat de coin antérieur (10j) par un moyen de pressage (28, 35, 36).
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'outil d'écartement (21, 30) est doté de lignes de contour antérieures (23v, 24v, 31vl, 31vr), et en option également de lignes de contour postérieures (23h, 24h, 31hl, 31hr), qui définissent des tronçons des côtés (10k, 10m) du rabat de coin triangulaire antérieur (10j), et en option également des tronçons des côtés (10q, 10r) du rabat de coin triangulaire postérieur (10p).
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'ouverture de la zone terminale du corps de sac en forme de tuyau a lieu en tirant en écartement les couches de tuyau (10a, 10b), appliquées les unes contre les autres, du corps de sac.
  10. Dispositif (1) pour la réalisation d'un fond ouvert au niveau d'une zone terminale ouverte d'un corps de sac (10) en forme de tuyau, ledit corps de sac étant de préférence fabriqué à partir d'un tissu en bandelettes de matière plastique étirées ou à partir d'une feuille de matière plastique, comprenant un moyen de transport (2) pour transporter les corps de sac (10) en situation à plat dans une direction de transport (T) transversale à leur extension longitudinale (L) avec une vitesse de transport (V), et comprenant un moyen d'ouverture (20) pour ouvrir la zone terminale à plier du corps de sac en forme de tuyau pendant son transport sur le moyen de transport, comprenant un outil d'écartement (21, 30, 32) qui peut être introduit dans la zone terminale ouverte (10e) de chaque corps de sac en forme de tuyau pendant son transport sur le moyen de transport,
    dans lequel l'outil d'écartement (31, 30, 32) est déplaçable en direction de transport (T) avec une vitesse (V1R) augmentée par rapport à la vitesse de transport (V) jusqu'à ce qu'il atteigne la partie antérieure (10v), vue en direction de transport, de la zone terminale ouverte et vienne s'engager avec au moins deux points de contour antérieurs (23p, 24p ; 33p, 34p), définis sur l'outil écartement, contre la face intérieure du corps de sac en forme de tuyau et écarte ici ladite partie antérieure (10v) pour donner un rabat de coin antérieur (10j) sous la configuration d'un triangle sensiblement équilatéral, et chaque côté (10k, 10m) du rabat de coin triangulaire antérieur (10j) est appliqué contre au moins un point de contour antérieur (23p, 24p ; 33p, 34p) de l'outil d'écartement, et dans lequel l'outil d'écartement (21, 30, 32) est déplaçable hors du rabat de coin antérieur (10j) par ralentissement relatif de son mouvement par rapport à la vitesse de transport (V),
    et un moyen de pressage (28, 35, 36) pour presser le rabat de coin antérieur engendré,
    caractérisé en ce que
    l'outil d'écartement (21, 32) est réalisé comme un outil subdivisé, dans lequel deux plaquettes (23, 24) ou barrettes (33, 34) sont montées sur un bras (22), qui libèrent entre elles un intervalle (21a, 32a), de sorte que le moyen de pressage (28, 35, 36) pénètre dans ou peut être passé à travers l'outil d'écartement à travers l'intervalle (21a, 32a), sans entrer en collision avec celui-ci, et en ce que l'outil d'écartement (21, 32) vient s'engager contre la face intérieure du corps de sac en forme de tuyau dans un déplacement de translation en direction de transport (T).
  11. Dispositif selon la revendication 10, caractérisé en ce que l'outil d'écartement (21, 30, 32) est déplaçable dans une zone terminale ouverte (10e) du corps de sac en forme de tuyau en direction de transport (T) avec une vitesse (V2R) réduite ou négative par rapport à la vitesse de transport (V), jusqu'à ce qu'il atteigne la partie postérieure (10h), vue en direction de transport, de la zone terminale ouverte, et vienne s'engager avec au moins deux points de contour postérieurs (23q, 24q ; 33p, 34p), définis sur l'outil écartement, contre la face intérieure du corps de sac en forme de tuyau, et écarte ici ladite partie postérieure (10h) pour donner un rabat de coin postérieur (10p) sous la forme d'un triangle sensiblement équilatéral, dans lequel chaque côté (10q, 10r) du rabat de coin triangulaire postérieur (10p) s'applique contre au moins un point de contour postérieur (23q, 24q ; 33p, 34p) de l'outil d'écartement, et dans lequel l'outil d'écartement (21, 30, 32) peut être déplacé hors du rabat de coin postérieur (10p) par accélération relative (V3R) de son mouvement par rapport à la vitesse de transport (V), et dans lequel il est prévu un moyen de pressage (28, 35, 36) pour presser le rabat de coin postérieur engendré.
  12. Dispositif selon la revendication 10 ou 11, caractérisé par un système de pliage de zone terminale, au moyen duquel les zones terminales (10e) des corps de sac en forme de tuyau (10) peuvent être amenées le long d'une ligne de pliage s'étendant en direction de transport (T) hors d'un premier plan (e1) jusque dans un second plan (e2) s'étendant sensiblement perpendiculairement à celui-ci, dans lequel le système de pliage de zone terminale comprend de préférence une barrette de pliage (12) avec une arrête de pliage s'étendant en direction de transport (T), et au moins une tôle de déflexion (11a, 11b).
  13. Dispositif selon l'une des revendications 10 à 12, caractérisé en ce que l'outil écartement (21, 30, 32) peut être amené dans une position éloignée de la zone terminale du corps de sac après la réalisation du rabat de coin triangulaire antérieur (10j) et le cas échéant également du rabat de coin triangulaire postérieur (10p).
  14. Dispositif selon l'une des revendications 10 à 13, caractérisé en ce que l'outil d'écartement (21, 30) comporte des lignes de contour antérieures (23v, 24v, 31v1, 31vr) et en option également des lignes de contour postérieures (23h, 24h, 31hl, 31hr), qui définissent des tronçons des côtés (10k, 10m) du rabat de coin triangulaire antérieur (10j) et en option également des tronçons des côtés (10q, 10r) du rabat de coin triangulaire postérieur (10p).
  15. Dispositif selon l'une des revendications 10 à 14, caractérisé en ce que l'outil écartement comprend un bras (22) et des plaques (23, 24, 31) et/ou des barrettes (33, 34) montées sur ce bras, sur lesquelles sont définis les points de contour antérieurs ou les lignes de contour antérieures et en option également les points de contour postérieurs ou les lignes de contour postérieures.
  16. Dispositif selon la revendication 15, caractérisé en ce que les plaques (23, 24, 31) et/ou les barrettes (33, 34) sont agencées symétriquement par rapport à la direction de transport.
  17. Dispositif selon l'une des revendications 10 à 16, caractérisé en ce que l'outil d'écartement (21, 30, 32) est monté sur un entraînement à courroie dentée (25) ou un entraînement à chaîne en recirculation, orienté en direction de transport, l'entraînement en recirculation pouvant être accéléré et ralenti par rapport à la vitesse de transport (T).
  18. Dispositif selon la revendication 17, caractérisé en ce qu'il est prévu deux outils d'écartement, parmi lesquels chaque outil d'écartement est entraîné par des unités d'entraînement séparées depuis une ou plusieurs courroies dentées ou chaînes Galle en recirculation parallèles.
  19. Dispositif selon l'une des revendications 10 à 18, caractérisé en ce que le moyen de pressage (28, 35, 36) comprend des courroies de pressage, des rouleaux de pressage, ou des éléments coulissants de pressage.
  20. Dispositif selon l'une des revendications 10 à 19, caractérisé en ce que le système d'ouverture (20) comprend des moyens d'aspiration (13, 14) susceptibles d'être mis en marche et à l'arrêt, qui peuvent être amenés respectivement à une couche de tuyau (10a, 10b) à la zone terminale (10e) du corps de sac en forme de tuyau (10) et, après avoir été appliqués contre la couche de tuyau respective et avoir mis en marche l'effet d'aspiration, peuvent être déplacés en éloignement l'un de l'autre transversalement à la direction de transport (T) et peuvent simultanément être déplacés avec la vitesse de transport (V) en direction de transport (T).
  21. Dispositif selon l'une des revendications 10 à 20, caractérisé en ce que les axes médians des moyens d'aspiration (13, 14) sont agencés en coïncidence ou sont décalés les uns derrière les autres en direction de transport (T), et sont de préférence agencés en décalage.
EP10187549.0A 2010-10-14 2010-10-14 Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires Active EP2441574B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
ES10187549T ES2424952T3 (es) 2010-10-14 2010-10-14 Procedimiento y dispositivo para la configuración de fondos abiertos en zonas finales de cuerpos de saco tubulares
EP10187549.0A EP2441574B1 (fr) 2010-10-14 2010-10-14 Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires
RU2013121833/12A RU2543423C2 (ru) 2010-10-14 2011-10-04 Способ и устройство для образования открытого дна в концевых зонах рукавных корпусов мешков
CN201180049808.3A CN103153599B (zh) 2010-10-14 2011-10-04 用于在管状的袋体的端部区域处构造敞开的底部的方法和装置
BR112013009006-5A BR112013009006B1 (pt) 2010-10-14 2011-10-04 Métodos e dispositivo para formar fundos abertos em regiões de extremidade de corpos de saco tubulares
MX2013003146A MX2013003146A (es) 2010-10-14 2011-10-04 Metodo y dispositivo para formar fondos abiertos en regiones extremas de cuerpos de saco tubulares.
PCT/EP2011/067329 WO2012049040A1 (fr) 2010-10-14 2011-10-04 Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sacs tubulaires
MYPI2013000880A MY155933A (en) 2010-10-14 2011-10-04 Method and device for forming open bottoms at end regions of tubular bag bodies
ZA2013/01974A ZA201301974B (en) 2010-10-14 2013-03-15 Method and device for forming open bottoms on and regions of tubular bag bodies

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EP10187549.0A EP2441574B1 (fr) 2010-10-14 2010-10-14 Procédé et dispositif de formation de fonds ouverts sur des zones d'extrémité de corps de sachets tubulaires

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MX (1) MX2013003146A (fr)
MY (1) MY155933A (fr)
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EP3017940A1 (fr) 2014-11-04 2016-05-11 Starlinger & Co. Gesellschaft m.b.H. Procédé et dispositif de fabrication de sacs à partir de corps de sac tubulaires
EP3269539A1 (fr) 2016-07-14 2018-01-17 Starlinger & Co. Gesellschaft m.b.H. Dispositif destiné à ouvrir une zone d'extrémité d'un corps de sachet tubulaire
EP3498624A1 (fr) 2017-12-14 2019-06-19 Starlinger & Co Gesellschaft m.b.H. Sac pour matière en vrac
WO2021151621A1 (fr) 2020-01-29 2021-08-05 Windmöller & Hölscher Kg Dispositif permettant de produire des replis d'angle sur des corps de sacs tubulaires

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AT515832B1 (de) 2014-05-20 2016-05-15 Lohia Corp Ltd Vorrichtung und Verfahren zum Ausbilden einer Bodenöffnung zwischen Sackabschnitten
CN108136708B (zh) * 2015-07-31 2020-12-15 温德莫勒及霍尔希尔公司 用于固定软管件的敞开的底部的装置和方法
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EP3017940A1 (fr) 2014-11-04 2016-05-11 Starlinger & Co. Gesellschaft m.b.H. Procédé et dispositif de fabrication de sacs à partir de corps de sac tubulaires
WO2016071261A1 (fr) 2014-11-04 2016-05-12 Starlinger & Co Gesellschaft M.B.H. Procédé et dispositif de fabrication de sacs à partir de corps de sac tubulaires
EP3269539A1 (fr) 2016-07-14 2018-01-17 Starlinger & Co. Gesellschaft m.b.H. Dispositif destiné à ouvrir une zone d'extrémité d'un corps de sachet tubulaire
WO2018011114A1 (fr) 2016-07-14 2018-01-18 Starlinger & Co Gesellschaft M.B.H. Dispositif d'ouverture d'une zone d'extrémité d'un corps de sac tubulaire
US10960634B2 (en) 2016-07-14 2021-03-30 Starlinger & Co Gesellschaft M.B.H. Device for opening an end region of a tubular bag body
EP3498624A1 (fr) 2017-12-14 2019-06-19 Starlinger & Co Gesellschaft m.b.H. Sac pour matière en vrac
WO2019115105A1 (fr) 2017-12-14 2019-06-20 Starlinger & Co Gesellschaft M.B.H. Sac pour matériaux en vrac
WO2021151621A1 (fr) 2020-01-29 2021-08-05 Windmöller & Hölscher Kg Dispositif permettant de produire des replis d'angle sur des corps de sacs tubulaires

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ES2424952T3 (es) 2013-10-10
CN103153599A (zh) 2013-06-12
RU2543423C2 (ru) 2015-02-27
RU2013121833A (ru) 2014-11-20
ZA201301974B (en) 2013-11-27
MX2013003146A (es) 2013-06-07
EP2441574A1 (fr) 2012-04-18
BR112013009006B1 (pt) 2020-12-15
BR112013009006A2 (pt) 2016-07-05
WO2012049040A1 (fr) 2012-04-19
MY155933A (en) 2015-12-31
CN103153599B (zh) 2015-06-17

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