EP3024625B1 - Procede et dispositif pour la production de sacs en tissu - Google Patents

Procede et dispositif pour la production de sacs en tissu Download PDF

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Publication number
EP3024625B1
EP3024625B1 EP14757826.4A EP14757826A EP3024625B1 EP 3024625 B1 EP3024625 B1 EP 3024625B1 EP 14757826 A EP14757826 A EP 14757826A EP 3024625 B1 EP3024625 B1 EP 3024625B1
Authority
EP
European Patent Office
Prior art keywords
sack
fabric
tube
tab
cutting
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.)
Not-in-force
Application number
EP14757826.4A
Other languages
German (de)
English (en)
Other versions
EP3024625A1 (fr
Inventor
Herwig Worff
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.)
Lohia Corp Ltd
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Lohia Corp Ltd
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Filing date
Publication date
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Publication of EP3024625A1 publication Critical patent/EP3024625A1/fr
Application granted granted Critical
Publication of EP3024625B1 publication Critical patent/EP3024625B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/001—Cutting tubes longitudinally
    • 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
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/16—Cutting 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/02—Feeding or positioning sheets, blanks or webs
    • B31B70/10—Feeding or positioning 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • 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
    • 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
    • B31B2150/0012—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular 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
    • 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
    • B31B2160/10—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
    • B31B2160/106—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from sheets cut from larger sheets or webs before finishing the bag forming operations
    • 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
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/148—Cutting-out portions from the sides of webs or 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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/10—Advancing webs by a feed band against which web is held by fluid pressure, e.g. suction or air blast

Definitions

  • the invention relates to a method for producing sacks from a fabric in which a flat fabric tube is provided which comprises a sack front wall and a sack rear wall, which lie flat on each other, and the flat fabric tube is fed to a cutting device in which the fabric tube is cut to length.
  • a flat fabric tube is provided which comprises a sack front wall and a sack rear wall, which lie flat on each other, and the flat fabric tube is fed to a cutting device in which the fabric tube is cut to length.
  • the invention further relates to a device for carrying out this method.
  • the tubular body of a bag is usually formed from a tubular material or a tube connected to a flat material.
  • a rough classification of such bags is made by the distinction in pillow and box shape.
  • a pillow form of sacks usually arises by assembling the floors with a textile seam or a weld.
  • the fabric consists preferably of monoaxially stretched polymer, in particular polyolefin or polypropylene tapes. These tapes are prepared by stretching polymer, in particular polyolefin or polypropylene films usually four to ten times, whereby the molecular chains are aligned in the tape longitudinal direction and have in these directions about six to ten times the strength of the original film.
  • the ribbon width is usually about 1.5 to 10 mm, the thickness 20 to 80 microns.
  • a method and a device of the type mentioned are, for example from the DE 10 2009 000 454 A1 known.
  • a device initially comprises a hose-forming device for producing and providing a tubular material. It may also be present only a Schlauchabwickelvorraum. This is usually equipped with a material wrap on which tubular material is wound. From this material wrap the material is usually withdrawn continuously in the longitudinal direction.
  • the fabric hose provided by the hose forming apparatus or by the hose unwinding apparatus is fed to a cross cutter which singulates the fabric hose into individual pieces of tubing.
  • the tubular bag bodies are transferred to a transport device.
  • a change in the transport direction is usually carried out by a longitudinal transport, in which the hose or hose pieces are transported in the direction of their longitudinal axes were, in a transverse transport in which the hose pieces are now no longer transported in the direction of its longitudinal tube axis, but transversely thereto, so that at least one end of the hose pieces for at least one-sided closing of the bag or for producing a sack bottom are laterally accessible.
  • the original and the new transport direction of the hose or hose piece are usually perpendicular to each other.
  • the at least one-sided closing of the bag takes place, for example, by attaching a seam in the transverse direction of the bag. Alternatively, a bottom fold may be made to obtain a rectangular bottom.
  • the invention therefore aims to make the bag closure such that the material of the bag is weakened as little as possible by the closure, so that the closed bag does not tear even under high mechanical loads, especially in the region of the closure.
  • a significantly higher throughput rate is to be made possible in comparison to the production of a conventional sewn closure seam.
  • the process reliability is to be increased, the maintenance of the machines reduced, the production costs minimized and the optical advantages of the product ensured.
  • the recycling should be simplified and the manufacturing costs are minimized.
  • the invention provides in a method of the type mentioned that the closing of the bag body by turning over a tab formed from the bag rear wall after the flap has been exposed in the longitudinal transport section by cutting out a portion of the bag front wall.
  • the formation of a tab allows a very simple and inexpensive connection of the folded tab with the bag body, wherein preferably a flat connection is made to maximize the holding forces.
  • the fact that the tab has been previously exposed the tab can be connected directly, ie without intermediate position of the bag front wall with the bag body.
  • the exposure of the tab in this case includes the cutting away of a tissue section of the bag front wall, which would otherwise come to rest between the folded flap and the bag body.
  • the process step of cutting the fabric tube and exposing the tab can be carried out in a single step, for example, by staggering the two superimposed layers of tissue fabric.
  • the otherwise caused by sewing needles perforations are avoided, whereby the bag is much denser. Furthermore, a product loss as well as a possible dust development is avoided.
  • sack front wall and sack rear wall do not limit the invention to the fact that the tab is formed from a specific wall. Rather, these terms merely serve to distinguish one of the two walls from the other wall.
  • the procedure according to the invention leads to a bag closure which is extremely stable.
  • a peeling load acting on the connection in which the interconnected tissue layers are pulled apart in a direction transverse to the tissue surface, leads to a release of the connection. It should therefore be ensured in principle that such a compound is only subjected to shearing, ie only subjected to a load parallel to the tissue surface.
  • This requirement is borne by the invention by apportionment of the tab, as a result of which the connection between the tab and the bag body is no longer exposed to any peel load, so that the connection can withstand even very high mechanical loads.
  • a separating layer is advantageously inserted into the tubular sack body or a separating layer is applied.
  • the separating layer preferably has a higher thermal conductivity than the sack tissue.
  • the release layer in particular a metal-containing release layer, is preferably applied by a coating process.
  • the release layer used here is preferably a metal-containing paint. Due to the metal content, such a separating layer leads to heat dissipation, so that the sack rear wall is subject to a lower or substantially no heat input.
  • a separating layer between the bag front wall and the sack rear wall can be arranged in the region of the welded connection.
  • the separating layer may, for example, be an internal, ie a stationary tool arranged in the interior of the tubular body, which device separates the front wall from the rear wall during the transverse transport of the bag body.
  • exposing the tab comprises performing at least three, preferably four contiguous cuts.
  • a rectangle is cut out by the cuts, wherein two cuts are made along the side edges of the fabric tube.
  • two sections extend over the entire width of the fabric tube. The cuts are made in the longitudinal transport section, preferably on the tubular fabric.
  • the cutting of the rectangle can be done before the cutting of the fabric tube, for example by punching a rectangle on the bag front wall or on the sack rear wall.
  • An alternative procedure provides that one of the cuts is produced by the cutting of the fabric tube. It is preferred in terms of the order of the individual cuts that at least two cuts, preferably three cuts are made prior to cutting the fabric tube to length. When cutting the fabric tube thus takes the last cut that is required for the exposure of the tab.
  • any cutting method which ensures the creation of a slit in the tissue can be used for cutting the tissue.
  • a cutting tool in particular a hot knife against the outer surface of the fabric, wherein on the inner surface of the fabric by means of a arranged in the interior of the fabric hose counter-pressure is generated.
  • the hot knife has a temperature which is sufficient to locally melt or weaken the material of the fabric hose to such an extent that it can be slit through a small force.
  • the flap is preferably folded so that even one of the tab adjacent, the bag front wall and the sack rear wall comprehensive area of the fabric tube is folded.
  • the closure of the bag body preferably comprises the connection of the folded flap with the bag front wall.
  • the procedure is such that the tab and the bag front wall are joined together by gluing and / or welding. When joining can also proceed in such a way that in addition to the tab and an adjacent to the tab, the bag front wall and the sack rear wall comprehensive area of the fabric tube is at least partially mitverbunden, in particular mitverklocating.
  • Extrusion bonding is particularly preferred because it does not require pretreatment such as corona treatment of the surface for the adhesive to hold.
  • the extrusion bonding is inexpensive and it is achieved a single-grade end product that is easily recyclable.
  • the extrusion bonding requires a continuous application of the extrudate, which is readily possible in the context of the present invention, if the application of the extrudate and the closing of the bag body are preferably carried out in the transverse transport section.
  • Extrusion bonding is a process in which a still (thick) liquid extrudate emerging from an extruder is applied to the bonding site and the fabric areas to be bonded together are pressed onto each other before the extrudate hardens.
  • the extrudate is made of the same plastic as the fabric. The extrusion bonding allows a secure bonding even with uncoated fabric.
  • hot contact welding or ultrasonic welding may be used.
  • the closing of the bag body is carried out according to the invention in a transverse transport section, in which the bag body are transported in a direction transverse to its longitudinal direction transport direction.
  • the longitudinal direction of a bag body is understood to mean that direction which runs parallel to the side edge of the bag body and connects the two open ends of the bag body.
  • the method is carried out in a particularly advantageous and efficient manner when the folding over and if necessary connecting the tab takes place during the transverse transport of the bag body, i. while the bag body moves in the transport direction.
  • the end portion of the bag body to be closed thereby moves past a stationary envelope, adhesive and pressing device.
  • the invention is preferably used in sacks whose fabric consists of monoaxially stretched polymer, in particular polyolefin or polypropylene tapes.
  • the fabric can basically be coated or uncoated. In the case of a coating, this preferably consists of the same polymer as the polymer ribbons.
  • the coating may consist of a thin layer of polypropylene or a mixture of polypropylene and polyethylene.
  • the invention further proposes a device for producing sacks of a fabric tube, in particular for carrying out the method according to the invention, comprising a first cutting device, which is a flat fabric tube in the longitudinal direction of the fabric tube can be fed and by the At least one transport device is provided, which has a longitudinal transport section for transporting the fabric hose or the tubular bag body in the longitudinal direction of the fabric tube and a transverse transport section for transporting the fabric tube or tubular bag bodies can be led away Has bag body in a direction transverse to its longitudinal direction transport direction, wherein the cutting device in the longitudinal transport section and the Sackgro Rperverschhow adopted arranged in the transverse transport section.
  • a first cutting device which is a flat fabric tube in the longitudinal direction of the fabric tube can be fed and by the At least one transport device is provided, which has a longitudinal transport section for transporting the fabric hose or the tubular bag body in the longitudinal direction of the fabric tube and a transverse transport section for transporting the fabric tube or tubular bag bodies can be led away Has bag body in
  • a second cutting device is arranged in the longitudinal transport section, which is designed to cut out a section of a bag front wall for exposing a tab formed from the rear wall of the bag, and the bag closing device comprises a transfer device for folding over the flap.
  • the SackShikissen comprises means for connecting the folded flap with the bag front wall.
  • the Connecting means may preferably comprise a welding or gluing device.
  • the second cutting device is assigned an internal tool against which a knife of the cutting device can be pressed.
  • the internal tool is in this case arranged so that it comes to rest in the interior of the tubular bag body during operation.
  • the internal tool can be preceded by means for spacing the superimposed layers of tissue of the flat tube of the bag body so that it does not come to collisions with the internal tool during transport of the tubular bag body.
  • a preferred embodiment provides that a heating device is provided for heating the blade of the cutting device.
  • the invention provides that the internal tool has adjustment means for adjusting the overall width.
  • the internal tool has at least two plate-like tool elements, which have mutually sliding inclined surfaces to change the overall width of the tool.
  • the adjustment means comprise at least one spring element, which is the plate-like Applied tool elements in the direction of the maximum total tool width.
  • a further preferred embodiment provides that the second cutting device is arranged in the transport direction of the tubular fabric in front of the first cutting device, whereby at the same time cutting the fabric tube by means of the first cutting means of the previously prepared by the second cutter by slitting the tissue section of the sack front wall is cut away.
  • FIG. 1 a schematic plan view of the device according to the invention
  • Fig.2 a sectional view taken along the line II-II
  • Fig. 3 a detailed view of the internal tool
  • Fig. 4 a modified embodiment of the device
  • Fig. 5 two through the device according to Fig. 4 obtained tubular bag bodies
  • 6 and 7 a training for gusseted bags
  • Fig. 8 a modified training for gusseted bags
  • the Fig. 9 - 11 another modified embodiment of the invention.
  • a fabric tube 1 of the device in the direction of arrow 2 is supplied and transported within a longitudinal transport section 3 of the device in the direction of arrow 2.
  • the fabric tube 1 is cut along the cutting lines 4, 5 and 6.
  • the course of the cutting lines 4, 5 and 6 is in Fig. 1 shown dashed left, with the line 4 over the entire width of the tubular fabric. 1 extends and the lines 5 and 6 each extend along the edges 7 of the tubular fabric.
  • the sections running along the cutting lines 4, 5 and 6 are created by means of the cutting device 8.
  • the cutting device 8 comprises an internal tool, ie a tool arranged between the fabric layers of the fabric hose 1, which comprises rollers 9 for spacing the fabric layers and a plate-shaped tool 10 arranged downstream of the rollers 9 in the transport direction 2.
  • the plate-shaped tool 10 serves as a counterpart for the externally acting on the tissue cutting blade.
  • the cutting blades 5 and 6 acting along the cutting blades are designated 11.
  • the cutting blade acting along the cutting line 4 is provided with 12 ( Fig. 2 ) designated.
  • the cutting blades 11 are heated and mounted according to the double arrow 13 movable to be pressed with the interposition of the tissue on the plate-shaped tool 10. As a result, cuts are made in the fabric along the cutting lines 4, 5 and 6.
  • the section produced along the cutting line 4 is designated 14 in a further forwardly transported section of the tubular fabric.
  • the cut 14 is in this case only in the upper fabric layer or the bag front wall 18 (FIG. Fig. 2 ), while the lower fabric layer or the sack rear wall 19 remains unaffected.
  • the lateral incisions produced along the cutting lines 5 and 6 are designated 15 and 16 in a further forwardly transported section of the tubular fabric.
  • the tubular fabric 1 is cut to length by means of a further cutting device, not shown, to individual tubular To obtain bag body 20.
  • the cut runs along the designated 21 cutting line.
  • the tissue section 22 marked by hatching falls away. This fabric section can be recycled in the sequence in which it is fed to an extruder for the production of fabric tape.
  • the tubular bag bodies 20 enter a transverse transport section 24, in which they are transported further in the direction of the arrow 25.
  • the bag body 20 in this case have open ends 26 and 27.
  • the tab 23 of the bag body 20 is now moved forwards along the fold line indicated by 28, i. on the visible in the drawing surface of the upper fabric layer or the bag front wall 18, turned over and with this surface, e.g. connected by gluing. This then results in the state designated by 29 of the bag body 20th
  • the cutting device 8 comprises two rollers 9, by which the two fabric layers 18 and 19 of the fabric tube 1 are spaced from each other.
  • the cutting device 8 further comprises a following in the transport direction 2 to the rollers 9 plate 10, which is designed as a counterpart to the cutting blade 12.
  • the plate-shaped tool 10 is shown in detail.
  • the tool is designed as an internal tool and comprises two plate-like tool elements 30 and 31.
  • the plate-like tool element 31 is arranged stationary, whereas the plate-like tool element 30 is displaceably guided in the direction of the double arrow 33.
  • the two plate-like tool elements slide against each other on an inclined surface 34, so that the total width of the tool changes depending on the relative position.
  • a spring element 32 ensures that the two plate-like tool elements 30 and 31 always interact with one another on the inclined surface 34.
  • the first cutting blade 12 intersects the bag front wall 18 along the cutting line 4 and the second cutting blade 35 snows the bag back wall 19 along the cutting line 21.
  • the cutting blades 11 produce analog for training according to Fig. 1 the lateral cuts 15 and 16.
  • Fig. 6 a modified training for the processing of gusseted bags.
  • the gussets are designated 36 and are connected in the designated 38 area with each other and with the sack front wall 18 and the sack rear wall 19, in particular welded to achieve a seal of the sack closure in Beriech the gussets.
  • the tab 23 together with the welded areas 38 is folded over and connected to the bag body.
  • stamp 37 are shown a welding device, which serve to press the fabric layers to be joined together and to weld together.
  • Fig. 8 you can proceed as in Fig. 8 is shown.
  • the procedure is such that the side folds 36 are not cut during the production of the cut 14. Rather, be the side pleats 36 are cut in a separate section along the line 39 which is closer to the bag end than the cut 14. In this way, the portion of the side pleats 36 projecting into the region of the tab 23 can be displaced along the line 28 when the flap 23 is folded over be folded, so as to achieve a complete seal of the bag closure.
  • FIG. 9 is a side view of a flat fabric tube 1 with two superimposed layers of fabric 18 and 19. Along the side edges of the fabric tube first cuts 15 and 16 are made. This is in particular in the plan view according to Fig. 10 clearly. Thereafter, the two fabric layers 18 and 19 are pushed together according to the arrows 40, so that the fabric in the region of the incisions 15,16 folds 41 forms.
  • the procedure is such that the fold 41 of the fabric layer 18 and the fold 41 of the fabric layer 19 are folded in directions opposite to each other in order to allow the use of a cutting device 42 for severing the two fabric layers in the area between the two folds 41 .
  • the cutting device 42 preferably comprises two cutting blades, which can be pressed against the flat fabric tube from above and below in order to cut through the tissue lying between the cutting blades.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (19)

  1. Procédé de production de sacs à partir d'un tissu, dans lequel on fournit un tuyau de tissu plat (1), qui comprend une paroi avant de sac (18) et une paroi arrière de sac (19), qui sont appliquées à plat l'une sur l'autre, et le tuyau de tissu plat (1) est acheminé à un dispositif de coupe, dans lequel le tuyau de tissu (1) est coupé à longueur pour obtenir des corps de sacs individuels (20) de forme tubulaire, après quoi les corps de sacs (20) de forme tubulaire sont fermés à au moins une extrémité ouverte (27) par rabattement d'une section d'extrémité du tissu, dans lequel la coupe à longueur du tuyau de tissu (1) se fait dans une étape de transport longitudinal (3), dans laquelle le tuyau de tissu (1) ou les corps de sacs (20) de forme tubulaire est ou sont transportés dans la direction longitudinale du tuyau de tissu (1) et la fermeture du corps de sac (20) se fait de préférence dans une section de transport transversal (24), dans laquelle les corps de sacs (20) sont transportés dans une direction de transport (25) s'étendant transversalement à leur direction longitudinale, caractérisé en ce que la fermeture du corps de sac (20) se fait par rabattement d'une patte (23) formée de la paroi arrière (19) du sac, après quoi la patte (23) est libérée dans la section de transport longitudinal (3) par découpe d'une section (22) de la paroi avant (18) du sac, dans lequel la patte (23) et la paroi avant (18) du sac sont reliées l'une à l'autre par collage par extrusion, dans lequel l'extrudat est constitué de la même matière plastique que le tissu.
  2. Procédé selon la revendication 1, caractérisé en ce que la libération de la patte (23) comprend la réalisation d'au moins trois coupes contiguës (4, 5, 6).
  3. Procédé selon la revendication 2, caractérisé en ce que l'une des coupes est faite par la coupe à longueur du tuyau de tissu (1).
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce qu'au moins deux coupes (5, 6) sont effectuées avant la coupe à longueur du tuyau de tissu (1).
  5. Procédé selon la revendication 2, 3 ou 4, caractérisé en ce qu'au moins une coupe (4) se fait par pression d'un outil de coupe, en particulier d'un couteau chaud (12), contre la surface externe du tissu, dans lequel une contre-pression est produite sur la surface interne du tissu au moyen d'une contre-pièce (10) agencée à l'intérieur du tuyau de tissu (1).
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le rabattement de la patte (23) se fait de façon qu'une zone du tuyau de tissu (1) limitée à la patte (23) et comprenant la paroi avant (18) du sac et la paroi arrière (19) du sac soit également rabattue.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le tissu du tuyau de tissu (1) n'est pas revêtu.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la patte rabattue (23) et la paroi avant (18) du sac sont pressées l'une sur l'autre après leur liaison.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le rabattement et éventuellement la liaison de la patte (23) se font pendant le transport transversal des corps de sacs (20).
  10. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le tissu est constitué de bandelettes de polymère, en particulier de polyoléfine ou de propylène, étirées monoaxialement.
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que chaque deuxième corps de sac (20) de forme tubulaire est retourné pour la fermeture des deux extrémités de sac ouvertes.
  12. Procédé selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la coupe à longueur du tuyau de tissu (1) et la libération de la patte (23) sont effectuées en une seule étape, par exemple en coupant à longueur les deux couches de tissu du tuyau de tissu (1) appliquées l'une sur l'autre en décalage.
  13. Dispositif de production de sacs à partir d'un tuyau de tissu, en particulier pour effectuer le procédé selon l'une quelconque des revendications 1 à 12, comprenant un premier dispositif de coupe, auquel peut être acheminé un tuyau de tissu plat (1) dans la direction longitudinale (2) du tuyau de tissu (1) et duquel peuvent être évacués des corps de sacs (20) de forme tubulaire obtenus par coupe à longueur, et un dispositif de fermeture de corps de sacs, auquel peuvent être acheminés les corps de sacs (20) de forme tubulaire, dans lequel il est prévu en outre au moins un dispositif de transport, qui présente une section de transport longitudinal (3) pour transporter le tuyau de tissu (1) ou les corps de sacs (20) de forme tubulaire dans la direction longitudinale (2) du tuyau de tissu (1) et une section de transport transversal (24) pour transporter les corps de sacs (20) dans une direction de transport (25) s'étendant transversalement à sa direction longitudinale, dans lequel le dispositif de coupe est agencé dans la section de transport longitudinal (3) et le dispositif de fermeture de corps de sacs dans la section de transport transversal (24), caractérisé en ce qu'il est agencé dans la section de transport longitudinal (3) un second dispositif de coupe (11, 12), qui est conçu pour couper une section (22) d'une paroi arrière (18) du sac pour libérer une patte (23) formée de la paroi arrière (19) du sac, et le dispositif de fermeture de corps de sacs comprend un dispositif de rabattement pour rabattre la patte (23) ainsi qu'un dispositif de collage par extrusion pour relier la patte (23) à la paroi avant (18) du sac, dans lequel il est affecté au second dispositif de coupe (11, 12) un outil interne (10) qui peut être pressé contre un couteau (12) du dispositif de coupe, dans lequel l'outil interne (10) présente des moyens d'adaptation pour adapter sa largeur totale.
  14. Dispositif selon la revendication 13, caractérisé en ce que le dispositif de fermeture de corps de sacs comprend des moyens pour relier la patte rabattue (23) à la paroi avant (18) du sac.
  15. Dispositif selon la revendication 14, caractérisé en ce que les moyens de liaison comprennent un dispositif de soudure ou de collage.
  16. Dispositif selon la revendication 13, 14 ou 15, caractérisé en ce qu'il est prévu un dispositif de chauffage pour chauffer le couteau du dispositif de coupe.
  17. Dispositif selon l'une quelconque des revendications 13 à 16, caractérisé en ce que l'outil interne (10) présente au moins deux éléments d'outil (30, 31) en forme de plaques qui présentent des faces obliques (34) coulissant l'une sur l'autre pour modifier la largeur totale de l'outil.
  18. Dispositif selon l'une quelconque des revendications 13 à 17, caractérisé en ce que les moyens d'adaptation comprennent au moins un élément de ressort (32), qui presse les éléments d'outil (30, 31) en forme de plaques dans le sens de la largeur totale maximale de l'outil.
  19. Dispositif selon l'une quelconque des revendications 13 à 18, caractérisé en ce que le premier dispositif de coupe est agencé dans la direction de transport du tissu tubulaire (1) devant le second dispositif de coupe.
EP14757826.4A 2013-07-26 2014-07-25 Procede et dispositif pour la production de sacs en tissu Not-in-force EP3024625B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA604/2013A AT514545B1 (de) 2013-07-26 2013-07-26 Verfahren zur Herstellung von Säcken aus einem Gewebe
PCT/AT2014/000149 WO2015010145A1 (fr) 2013-07-26 2014-07-25 Procédé et dispositif de production de sacs en tissu

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EP3024625B1 true EP3024625B1 (fr) 2018-04-11

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AT515542B1 (de) * 2014-04-03 2015-10-15 Worff Herwig Dipl Ing Verfahren zur Herstellung von Säcken aus einem Gewebeschlauch
CN108374281B (zh) * 2018-02-27 2019-08-30 青岛平成集装袋有限公司 一种吨袋剪布机及其裁剪工艺

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US3390617A (en) * 1962-02-28 1968-07-02 Cloud Machine Corp Packaging method and apparatus
DE2530992C3 (de) * 1975-07-11 1980-01-31 Focke & Pfuhl, 2810 Verden Vorrichtung zum Herstellen von Verpackungszuschnitten
DE3408722A1 (de) * 1983-12-08 1985-06-20 Karl-Heinz Dr. 4802 Halle Sengewald Abreissbeutel aus thermoplastischer kunststoffolie
AT384995B (de) * 1986-05-22 1988-02-10 Chemiefaser Lenzing Ag Verfahren zum herstellen eines ventilsackes und ventilsack hergestellt nach dem verfahren
JP3408203B2 (ja) * 1999-07-08 2003-05-19 日興商事株式会社 自動開口製袋方法およびその装置
DE10106289A1 (de) * 2001-02-06 2002-08-29 Windmoeller & Hoelscher Verfahren zum Herstellen von Seitenfaltensäcken aus Kunststoffolie
DE102008017444B4 (de) * 2008-04-03 2011-07-28 Windmöller & Hölscher KG, 49525 Vorrichtung und Verfahren zur Herstellung von Säcken aus Schlauchstücken
DE102008017442B4 (de) * 2008-04-03 2013-01-17 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Herstellung von Säcken, welche Gewebe aus gereckten Kunststoffbändchen umfassen
DE102009000454B4 (de) 2009-01-28 2018-10-31 Windmöller & Hölscher Kg Vorrichtung und Verfahren zur Herstellung von Säcken aus schlauchförmigem Material
US9073281B2 (en) * 2010-04-22 2015-07-07 Coating Excellence International Llc Method and system for making a stepped end

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AT514545B1 (de) 2015-02-15
CN105555493B (zh) 2019-04-23
AT514545A4 (de) 2015-02-15
BR112016001731B1 (pt) 2021-02-02
BR112016001731A2 (pt) 2017-08-01
WO2015010145A1 (fr) 2015-01-29
EP3024625A1 (fr) 2016-06-01
CN105555493A (zh) 2016-05-04

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