EP3826831B1 - Dispositif et procédé de fabrication d'au moins un sac ouvert vide - Google Patents

Dispositif et procédé de fabrication d'au moins un sac ouvert vide Download PDF

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Publication number
EP3826831B1
EP3826831B1 EP19748477.7A EP19748477A EP3826831B1 EP 3826831 B1 EP3826831 B1 EP 3826831B1 EP 19748477 A EP19748477 A EP 19748477A EP 3826831 B1 EP3826831 B1 EP 3826831B1
Authority
EP
European Patent Office
Prior art keywords
sack
bag
molding box
negative pressure
transport
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
EP19748477.7A
Other languages
German (de)
English (en)
Other versions
EP3826831A1 (fr
Inventor
Willi Vollenkemper
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.)
Haver and Boecker OHG
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Haver and Boecker OHG
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Application filed by Haver and Boecker OHG filed Critical Haver and Boecker OHG
Publication of EP3826831A1 publication Critical patent/EP3826831A1/fr
Application granted granted Critical
Publication of EP3826831B1 publication Critical patent/EP3826831B1/fr
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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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • 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
    • B31B70/006—Controlling; Regulating; Measuring; Safety measures
    • 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
    • B31B70/004—Closing bags
    • 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
    • B31B70/261—Folding sheets, blanks or webs involving transversely folding, i.e. along a line perpendicular 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • 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
    • B31B70/74—Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/02—Machines characterised by the incorporation of means for making the containers or receptacles
    • 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
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in 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
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/645—Making seals transversally to the direction of movement

Definitions

  • the present invention relates to a device for producing at least one open sack or bag from at least one layer of a substantially flexible sack material.
  • a device for producing at least one open sack or bag from at least one layer of a substantially flexible sack material.
  • Such a device comprises at least one molding device with at least one essentially tubular molding box with an upper and a lower end in the contour of the bag to be molded.
  • At least one transport device is provided for transporting the bag material along the molding box and at least one closure device serves to connect the bag material along the molding box to form a tube.
  • at least one closing station is provided for producing a bag bottom, which is arranged below the lower end of the molding box.
  • the present invention also relates to a method for manufacturing a sack with such a device.
  • Sacks that are filled with a bulk material such as cement, high-quality grout or other building materials and that have relatively small weights can also be referred to as bags or small bags.
  • Such sacks are often produced in a device upstream of the device directly before filling.
  • a flat film is passed over a forming shoulder and the flat film is then passed over a forming element and welded to form a tubular film.
  • a bottom suture is placed and a sack of the desired size or height is severed from the tube.
  • a sack or bag produced in this way can then be transported on to a corresponding plant or station for filling with bulk material or filled on site through the molding box.
  • the bulk material to be filled is filled into the divided tube or sack until the desired weight or volume is reached. Then the top seam is sewn in and the sack with the bulk material inside is separated.
  • sacks produced in this way usually have side walls which bulge outwards at least slightly. This is due to the fact that when the sealing jaws are closed to introduce the seam for the bottom of a subsequent sack, air is pressed out of the film tube into the preformed sack. Since this is closed at the bottom by the bottom seam is, an overpressure is created in the sack blank until it is separated from the rest of the film tube.
  • a transfer to a transport box or the sliding of a sack into the transport box cannot always function reliably due to the low dead weight or empty weight.
  • the shape does not correspond to the desired outer contour, especially when the bag is filled with bulk material that is heavily compressed.
  • the resulting overpressure when closing the sealing jaws can lead to the film layers shifting relative to one another or to the formation of folds, which causes poor weld seam quality.
  • the DE24 48 694 A1 discloses a device by means of which a vacuum can be generated in a container made of film material and filled with a powdered material and closed, so that the film lies tightly against the powdered material.
  • the device according to the invention is intended for the production of at least one empty open sack from at least one layer of a substantially flexible sack material.
  • This device comprises at least one molding device with at least one molding box, which is formed essentially in the contour of the bag to be molded and has an upper and a lower end.
  • at least one transport device provided for transporting the bag material along the molding box.
  • the device comprises at least one closing device for connecting the bag material along the molding box to form a tube and at least one closing station for producing a bag bottom, which is arranged below the lower end of the molding box.
  • at least one vacuum device is provided, which is suitable and designed to generate at least a slight vacuum in the hose at least at the lower end of the molding box at least temporarily.
  • the vacuum device is preferably suitable and designed to generate the vacuum before and/or during the production of the bottom of the sack.
  • the substantially flexible bag material is first fed to the molding box, placed around it and transported along the molding box in the transport direction from the upper end to the lower end.
  • the transport device is provided, which is designed in a suitable manner.
  • the transport device comprises at least one conveyor belt, which presses the sack material against the transport box and conveys it along it.
  • the sack material is connected to form a tube by means of the closing device, with the tube then being closed by means of the closing station, as a result of which a sack base is produced.
  • the tube closed at the bottom is then transported further until the closing station produces the sack bottom of the next sack.
  • the closure station has closed to form the bottom of the sack, forming the bottom of the sack will purge the air in the closed tube also pressed in the direction of the preceding sack or the preceding sack bottom.
  • the preceding or lowermost sack is separated, preferably by means of a separating device, and the tube with the inserted sack bottom of the next sack is transported further.
  • a negative pressure is generated in the hose by means of the vacuum device, so that the sack material of the sack that is now to be separated is pulled slightly inward before the sack bottom of the subsequent sack is produced.
  • the negative pressure generated can be a few pascals up to a few hectopascals relative to the ambient pressure.
  • One advantage of this is that while the bottom of the following sack is being manufactured, air is again displaced into the preceding sack which is now to be separated, but this is not inflated now, but is inflated or reshaped back into its normal position. In this way, an optimally shaped sack can be produced in the shape or contour of the molding box when the open sack is separated. This can be optimally transferred to a molding box, since the bag material does not fall or fall out. is exposed to the outside.
  • the shape of the filled sack also corresponds to the shape specified by the molding box.
  • the generation of a slight negative pressure in the first sack when manufacturing the sack bottom of the subsequent sack prevents distortion from occurring as a result of tensions in the sack material, as a result of which the sack bottom or the closing seam would not be manufactured properly.
  • the device according to the invention is suitable for producing open, empty sacks from at least one layer of an essentially flexible sack material.
  • This sack material can be provided, for example, by a film web and/or a paper web, fabric, other materials or mixtures thereof.
  • the use of several layers or only partially multi-layer materials can also be advantageously used.
  • the sack material is made available in particular as endless material, which in particular also means material stored on a roll as a material supply, with these rolls being exchanged or connected as required.
  • the materials of the individual rolls can in particular be connected to form a practically endless material so that the material does not have to be threaded in again.
  • the molding device preferably comprises at least the in particular tubular molding box and at least one molding shoulder.
  • a forming shoulder is to be understood in particular as a component via which the essentially flexible bag material is formed or preformed in such a way that it is suitably fed to the molding box or guided around the molding box.
  • the sack shape or sack contour can be formed around the mold box from a layer of sack material, so that a hose can be inserted into the mold by means of the closure device Basic shape or cross-section of the later open bag is formed.
  • the closure device serves to produce a tube from the layer of bag material placed around the molding box.
  • the closure device is preferably designed in such a way that it connects the currently used bag material in a suitable manner.
  • a welding station can be provided which introduces a longitudinal seam into the bag material, with the film wrapped around the molding box overlapping slightly or at least slightly for this purpose.
  • the closure device can also be designed as a gluing station.
  • a coating or another material can be provided, so that in addition to an adhesive process, another closure option such as welding is also possible.
  • At least one device for forming a gusset and/or at least one device for pressing or pushing in the sack material to produce the sack bottom can also be assigned to the closure station for producing the sack bottom.
  • the sacks produced by means of the device according to the invention are then preferably transferred to a transport box or the like and then transported to a packing plant, in particular a separate one.
  • the sack can preferably be transferred from the transport box into a filling box and then filled in the packing plant.
  • the device according to the invention offers many advantages.
  • a considerable advantage is that, as already described above, the tube made of film material, which is closed at the bottom by the bottom seam, is made of film material before and/or during the production of the bottom of the sack of the following bag is at least slightly pulled inwards.
  • the sack separated after the production of the sack base of the subsequent sack is not inflated during the production of the sack base of the subsequent sack, as a result of which the side walls of the sack to be separated would bulge outwards.
  • the film material does not return to the original shape of the molding box to a satisfactory degree after the sack has been separated.
  • the sack would not slide optimally into a transport box or similar transfer box due to its low weight when it was transferred, which would mean that reliable operation of the system would not be guaranteed.
  • the shape of the sack or the uniform contact of the sack walls with the transfer box would also be different than specified. This is prevented according to the invention.
  • the vacuum device preferably comprises at least one vacuum line and/or at least one piston and/or at least one venturi device or any other type of vacuum generation.
  • a vacuum line or a suction line can be provided, which generates at least a slight vacuum on the underside or on the lower end of the molding box.
  • a piston can also be used, with air being sucked out of the hose or molding box depending on the stroke or setting of the stroke of the piston, so that the bag walls can be easily moved move inward.
  • a valve device can also generate the negative pressure if, for example, an air stream flows past an opening in the molding box and thus draws air out of it via the Venturi effect, whereby a negative pressure can also be generated on the underside of the molding box.
  • the molding box particularly preferably has at least one free flow cross section from the upper end to the lower end, the negative pressure device being connected at the upper end to the free flow cross-section.
  • the upper end is to be understood as meaning an upper section of the molding box on which the bag material is at least not yet completely guided around the molding box. In this way, the vacuum device can be connected to the molding box without interfering with the transport of the bag material along the molding box.
  • the molding box is of tubular design or is produced by bending or forming sheet metal, for example.
  • a hollow mold box is thus provided. If this is essentially closed at the upper end, a negative pressure is generated at the lower end of the mold box when a negative pressure is applied.
  • the free flow cross section and the vacuum device do not form a completely closed system.
  • a deliberate leak, so to speak, which is achieved in particular by the design of the molding box, can ensure that even if there is a permanent negative pressure, no vacuum is drawn in the hose, which is closed at least on one side, which could lead to the hose collapsing or even being pulled in would guide the molding box.
  • At least one suction connection is arranged on the molding box.
  • a suction connection can be provided in particular at the upper end, for example for connection to a suction line or to a hose.
  • the upper end is to be understood in such a way that in this area of the molding box there is still no full-surface encasing of the molding box with bag material.
  • the negative pressure generated by the negative pressure device is preferably adjustable.
  • a valve and/or a throttle and/or a secondary air flap can be provided, which set or by means of which the generation of a negative pressure can be switched on and off.
  • the negative pressure can also be set via a pulse, with the strength of the negative pressure being generated via the pulse length or the vibration of the air flow.
  • At least one transport plunger is arranged at the lower end of the molding box, which can be displaced at least slightly in the direction of transport of the bag material.
  • a transport plunger is in particular designed in such a way that it can be shifted into the transport box at least in sections and continues the contour of the molding box at least in sections.
  • the transport plunger can in particular be of essentially conical design.
  • Such a transport plunger serves in particular to further convey the tube of film material or the bag to be separated afterwards, even if the transport device should no longer have any contact with the bag material in the area of the lower end of the molding box, depending on the design of the device.
  • the transport plunger supports the sliding of the foil during further transport.
  • At least one through opening is provided in the transport plunger.
  • a negative pressure can also be generated in the tube if a transport plunger is provided, which would essentially close the lower end of the molding box from the contour and air can flow into the resulting cavity during further transport.
  • At least one pressure line can preferably also be routed through the molding box.
  • a pressure line is then preferably suitable and designed to generate at least a slight overpressure in the hose or in the hose closed on one side by the bottom of a sack.
  • Such a pressure line serves in particular to transport the bag or to push the film loose during further conveying and/or to straighten the film sliding off the molding box hose.
  • Such a pressure line is passed through the transport plunger, in particular when a transport plunger is used, or a corresponding opening is provided in the transport plunger, through which the pressure line can introduce excess pressure into the tube made of film material. With this pressure line, the inflow of air through the opening in the transport plunger can be additionally supported.
  • At least one separating device is preferably assigned to the closure station.
  • a separating device separates the previously formed sack during or after the manufacture of the sack bottom of a subsequent sack, as a result of which a sack that is open on one side is manufactured.
  • a separating device can be provided, for example, by a fly cutter, which is arranged downstream of the closure station or can also be integrated into the closure station.
  • sliding and/or draw knives can also be used.
  • the previously formed sack can also be thermally separated when the sack bottom of a subsequent sack is produced.
  • a thermowelding jaw can be provided, which is integrated into the closing station or makes the closing station available.
  • This can be shaped in such a way that, at the same time as producing a sack bottom, the sack hanging underneath that has not yet been separated is thermally separated. It must be ensured that the film layers of the open end of the sack produced do not stick to one another as a result of the thermal separation.
  • the method according to the invention is suitable for producing at least one open sack with a device as described above.
  • a device as described above.
  • at least one layer of a substantially flexible bag material in particular as a continuous material, is placed around the molding box in the contour of the bag to be formed.
  • the bag material is connected to a tube by means of the closing device, which is transported further along the molding box.
  • Below the molding box a closure station is arranged, which produces the sack bottom of the sack to be formed.
  • at least a slight negative pressure is generated in the tube made of sack material by means of the negative pressure device.
  • the method according to the invention also offers the advantages that have already been explained above for the device.
  • a finished sack is preferably separated by means of the separating device when producing the sack bottom of the following sack.
  • the transport of the hose is particularly preferably supported by the displacement of at least one transport plunger, which can preferably move in the transport direction and counter to the transport direction.
  • the overpressure device can also or additionally generate at least a slight overpressure in the hose at least temporarily in order to transport the hose further along the molding box or to support the sliding of the film at the end of the molding box.
  • figure 1 shows a perspective overall view of a device 200 for filling bulk materials and fluids into flexible, open-topped sacks 100 figure 1
  • the sacks 100 processed by the device 200 shown consist of a flexible sack material 101 and here of plastic material or foil.
  • the device 200 comprises a device 1 according to the invention for the production of open sacks 100, a transfer device 250, a filling carousel 201 and a compression station, the compression station not being shown in the figures.
  • the device 1 according to the invention for producing sacks 100 makes sacks available which, in the exemplary embodiment shown, fall or slide into a transport box 251 of the transfer device 250 .
  • the transport box 251 then swivels and lets the open sack 100 fall down into the filling box 202 above a filling box 202 .
  • the sack moves on the filling carousel 201 and is being filled at the same time.
  • sack material 101 is guided from a supply 20 around a molding box 3 via a forming shoulder 22, so that the web of sack material 101 overlaps at least slightly.
  • a closure device 7 By means of a closure device 7 , a tube 102 is formed from the bag material 101 placed around the mold box 3 , into which tube a bag base 103 is subsequently introduced by the closure station 8 .
  • an open bag 100 In order for an open bag 100 to slide or fall smoothly into both the transport box 251 and the filling box 202, it must have a predetermined shape or contour. This is ensured with the device according to the invention for the production of open sacks. In addition, it is achieved that the filled sack still has the desired shape even after a possible subsequent compression or even extreme post-compression.
  • FIG. 2 to 6 1 is a purely schematic representation of an exemplary embodiment of a device 1 according to the invention for the production of empty sacks 100 in various views.
  • the device 1 includes in the embodiment shown here in addition to a supply 20 for sack material 101, a deflection system 21, which comprises a plurality of rollers, via which the layer of sack material 101 via a in the Figures 2 to 6 not shown forming shoulder 22 is fed to the mold box 3.
  • a deflection system 21 which comprises a plurality of rollers, via which the layer of sack material 101 via a in the Figures 2 to 6 not shown forming shoulder 22 is fed to the mold box 3.
  • the molding shoulder 22 and the molding box 3 form the molding device 2.
  • the molding box 3 has the contour of the open bag 100 to be produced, with the layer or layers of bag material 101 being suitably fed to the molding box 3 or guided around it via the forming shoulder 22, so that the bag material is in the contour of the sack 100 to be formed can be connected to form a tube 102 by means of a closure device 7 .
  • the bag material 101 laid around the molding box 3 is transported along the molding box 3 by means of a transport device 6 which comprises two belt drives 23 in the exemplary embodiment shown here.
  • the belt drives 23 press the bag material 101 against the molding box 3 and thus transport the bag material 101 or the tube 102 along the transport direction 16 via the molding box 3.
  • the molding box 3 has an upper end 4 and a lower end 5, with a closing station 8 being provided below the lower end 5, which produces a sack 100 or a sack blank from the tube 102 made of sack material 101 by introducing a sack bottom 103. which is separated from the hose 102 by means of a separating device 19 .
  • a vacuum device 9 is provided, which generates at least one vacuum at the lower end 5 of the molding box 3 .
  • FIG 7 an exemplary embodiment of a device 1 according to the invention is shown purely schematically, with only the molding box 3, the closing station 8 and the separating device 19 being shown for a better overview.
  • bag material 101 or a tube 102 that has already been formed from bag material 101 is transported along molding box 3 , which has the contour of later open bag 100 .
  • FIG 7 shows purely schematically what happens when the closure station 8 moves together in order to form a bag bottom 103 . Since the hose 102 with the sack base 103 of the previously manufactured sack 100 is still hanging below the molding box 3, when the closure station 8 is moved together to form the sack base 103 of the subsequent sack 100, air in the hose 102 is also released into the section lying at the bottom in the transport direction 16 of the hose 102 pressed with the bottom 103 of the sack.
  • this section inflates and the sack walls 104 bulge outwards.
  • the excess pressure now prevailing in the bag 100 escapes as soon as the separating device 19, in this case a fly knife 24, has separated the bag 100, which is then open at the top, from the rest of the tube 102.
  • the sack walls 104 do not recover completely or satisfactorily. This has the disadvantage that the sack cannot slide so easily into a transport box 251 arranged underneath and later into the filling box 202 either.
  • a negative pressure is generated at the lower end 5 of the molding box 3 via a free flow cross section 13 within the molding box 3 via a suction connection 14 .
  • the suction connection 14 is provided here at the upper end 4 of the molding box.
  • the upper end 4 does not necessarily mean the uppermost section of the molding box 3, but rather each section of the molding box 3 around which the bag material 101 has not yet been completely folded, so that there is free access to the molding box 3. If necessary, also from above.
  • the negative pressure is provided here via a negative pressure line 10 which is connected to the suction connection 14 .
  • the vacuum device 9 can also include a piston 11 and/or a venturi device 12, for example.
  • the result is that the sack material 101 or the sack material 101 lying on top of one another does not shift against one another when the sack bottom 103 is being produced, so that a properly formed sack bottom 103 or closure seam 105 is produced, for example, in the form of a welded seam and/or glued seam.
  • a transport stamp 15 can be provided at the lower end 5 of the molding box 3 can, which can be moved in the transport direction 16 and counter to the transport direction 16.
  • the transport plunger 15 is of conical design, so that at least part of the transport plunger 15 can be accommodated within the mold box 3 .
  • Another section of the transport plunger 15 continues the outer contour of the mold box 3 here.
  • the outer circumference of the transport plunger 15 is preferably designed to be slightly smaller than the outer circumference of the molding box, so that the film can easily slide over it and is not pulled back with the rearward movement of the transport plunger 15 .
  • the movement of the transport plunger 15 in the transport direction 16 means that the tube 102 formed around the molding box 3 is also transported further when the transport device 6 is no longer in contact with the tube 102 in this area and is thus pushing the bag material 101.
  • the transport plunger 15 makes it easier for the tube 102 to slide off or loosen or set in motion from the molding box 3.
  • figure 9 shown purely schematically that a pressure line 18 can be in operative connection to the lower end 5 of the molding box through the molding box 3 or in another suitable manner.
  • an overpressure can also be generated in the last hose section by means of the pressure line in order to support the transport of the sack 100 or the hose 102 before the sack 100 is separated.
  • FIG 10 a view from below of a transport plunger 15 in a molding box 3 is shown purely schematically. It can be seen here that the transport plunger 15 completely fills the cross section of the molding box 3 so that no negative pressure could be generated through the molding box 3 at the lower end 5 of the molding box 3 .
  • a plurality of through-openings 17 are provided, through which a created by the molding box 3 Negative pressure can also act through the transport plunger 15 at the lower end 5 of the molding box 3, or when the hose 102 is conveyed further, air can flow in.
  • pressure line 18 can also have its own passage opening 17 or is arranged in another passage opening 17, so that a temporary overpressure can be applied in the hose 102 below the molding box 3 through the transport plunger.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Claims (14)

  1. Dispositif (1) de fabrication d'au moins un sac ouvert (100) à partir d'au moins une couche d'un matériau de sac sensiblement souple (101), comprenant au moins un dispositif de moulage (2) comportant au moins un caisson de moulage (3) dans le contour du sac à mouler avec une extrémité supérieure (4) et une extrémité inférieure (5), au moins un dispositif de transport (6) pour le transport du matériau de sac (101) le long du caisson de moulage (3), au moins un dispositif de fermeture (7) pour connecter le matériau de sac (101) le long du caisson de moulage pour former un tuyau (102) et au moins une station de fermeture (8) pour créer un fond de sac (103) qui est disposé en-dessous de l'extrémité inférieure (5) du caisson de moulage (3),
    caractérisé en ce
    qu'il est prévu au moins un dispositif de dépression (9) qui est apte et conçu pour générer, au moins temporairement au moins à l'extrémité inférieure (5) du caisson de moulage (3), une légère dépression dans le tuyau.
  2. Dispositif (1) selon la revendication 1, caractérisé en ce que le dispositif de dépression (9) est apte et conçu pour générer la dépression avant et/ou pendant la création du fond de sac (103).
  3. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que le dispositif de dépression (9) comprend au moins une conduite de dépression (10) et/ou au moins un piston (11) et/ou au moins un dispositif Venturi (12).
  4. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que le caisson de moulage présente au moins une section transversale d'écoulement libre (13) de l'extrémité supérieure (4) à l'extrémité inférieure (5) et que le dispositif de dépression (9) est connecté par l'extrémité supérieure (4) à la section transversale d'écoulement libre (13).
  5. Dispositif (1) selon une des revendications précédentes, caractérisé en ce qu'au moins la section transversale d'écoulement libre et le dispositif de dépression (9) ne forment pas de système entièrement fermé.
  6. Dispositif (1) selon une des revendications précédentes, caractérisé en ce au moins un raccord d'aspiration (14) est disposé au niveau du caisson de moulage (3).
  7. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que la dépression générée par le dispositif de dépression (9) est réglable.
  8. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que, à l'extrémité inférieure du caisson de moulage, est disposé au moins un tampon de transport (15) qui est déplaçable au moins légèrement dans le sens de transport (16).
  9. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que, dans le tampon de transport (15), au moins un orifice traversant (17) est pratiqué.
  10. Dispositif (1) selon une des revendications précédentes, caractérisé en ce que, à travers le caisson de moulage (3), passe au moins une conduite sous pression (18) qui est apte et conçue pour générer au moins temporairement dans le tuyau (102) au moins une légère surpression.
  11. Dispositif (1) selon une des revendications précédentes, caractérisé en ce qu'au moins un dispositif de séparation (19) est associé à la station de fermeture (8).
  12. Procédé de fabrication d'au moins un sac ouvert avec un dispositif selon une des revendications précédentes, dans lequel au moins une couche d'un matériau de sac sensiblement souple est déposée sous forme de matériau continu autour du caisson de moulage dans le contour du sac à former et est connectée au moyen du dispositif de fermeture pour former un tuyau et un fond de sac est créé au moyen de la station de fermeture,
    caractérisé en ce que,
    au moins avant et/ou pendant la création du fond de sac d'un sac suivant, au moins une légère dépression est générée au moins temporairement dans le tuyau en matériau de sac au moyen du dispositif de dépression.
  13. Procédé selon la revendication précédente, en utilisant un dispositif selon au moins la revendication 11, caractérisé en ce qu'un sac fini est séparé au moyen du dispositif de séparation lors de la création du fond de sac du sac suivant.
  14. Procédé selon une des deux revendications précédentes, en utilisant un dispositif selon au moins les revendications 8 et 10, caractérisé en ce que le tampon de transport (15) permettant de transporter le tuyau (102) est déplacé et/ou que, au moyen de la conduite sous pression (18), au moins une légère surpression est générée au moins temporairement dans le tuyau (102) afin de transporter le tuyau (102) le long du caisson de moulage (3).
EP19748477.7A 2018-07-24 2019-07-11 Dispositif et procédé de fabrication d'au moins un sac ouvert vide Active EP3826831B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117871.9A DE102018117871A1 (de) 2018-07-24 2018-07-24 Vorrichtung und Verfahren zur Herstellung wenigstens eines leeren offenen Sackes
PCT/EP2019/068663 WO2020020651A1 (fr) 2018-07-24 2019-07-11 Dispositif et procédé de fabrication d'au moins un sac ouvert vide

Publications (2)

Publication Number Publication Date
EP3826831A1 EP3826831A1 (fr) 2021-06-02
EP3826831B1 true EP3826831B1 (fr) 2022-09-14

Family

ID=67513481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19748477.7A Active EP3826831B1 (fr) 2018-07-24 2019-07-11 Dispositif et procédé de fabrication d'au moins un sac ouvert vide

Country Status (7)

Country Link
US (1) US11780200B2 (fr)
EP (1) EP3826831B1 (fr)
CN (1) CN112469555B (fr)
CA (1) CA3107047A1 (fr)
DE (1) DE102018117871A1 (fr)
ES (1) ES2932288T3 (fr)
WO (1) WO2020020651A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022254313A1 (fr) * 2021-06-01 2022-12-08 Lohia Corp Limited Appareil et procédé pour produire un sac ayant un fond intégralement fermé et une partie supérieure à fermeture automatique, et sac

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH373683A (de) * 1962-11-12 1963-11-30 Sig Schweiz Industrieges Vorrichtung zum Abfüllen von sperrigem schüttbarem Gut
DE1586328A1 (de) * 1967-06-01 1971-01-14 Verpackungs Und Schokoladenmas Verfahren zum Entlasten der Querschweissnaht
SE7315471L (fr) * 1973-11-15 1975-05-16 Platmanufaktur Ab
CH574806A5 (fr) * 1974-02-13 1976-04-30 Sig Schweiz Industrieges
DE2519631A1 (de) * 1975-05-02 1976-11-11 Bosch Gmbh Robert Vorrichtung zum herstellen evakuierter packungen
EP0679577B1 (fr) * 1993-11-12 1999-04-07 Shinwa Corporation Procede et dispositif pour emballer un article par la pression atmospherique
JP2010184732A (ja) * 2009-02-13 2010-08-26 Ishida Co Ltd 製袋包装機
CN102673835A (zh) * 2012-05-30 2012-09-19 张秀英 带抽真空装置的热封口机
DE102014113859A1 (de) 2014-09-24 2016-03-24 Haver & Boecker Ohg Vorrichtung und Verfahren zum Füllen von Offensäcken
DE102014113864A1 (de) 2014-09-24 2016-03-24 Haver & Boecker Ohg Vorrichtung und Verfahren zur Abfüllung von fließfähigen Materialien

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WO2020020651A1 (fr) 2020-01-30
CN112469555B (zh) 2023-04-25
EP3826831A1 (fr) 2021-06-02
ES2932288T3 (es) 2023-01-17
DE102018117871A1 (de) 2020-01-30
US20210237388A1 (en) 2021-08-05
CN112469555A (zh) 2021-03-09
US11780200B2 (en) 2023-10-10
CA3107047A1 (fr) 2020-01-30

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