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
  • B31B70/02—Feeding or positioning sheets, blanks or webs
  • B31B70/04—Feeding sheets or blanks
• • 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
  • 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
  • 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
  • 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
  • B31B2160/20—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
  • B31B50/02—Feeding or positioning sheets, blanks or webs
  • B31B50/04—Feeding sheets or blanks
  • B31B50/046—Feeding sheets or blanks involving changing orientation or changing direction of transport
• • 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
  • B31B70/005—Making flexible containers, e.g. envelopes or bags involving a particular layout of the machinery or relative arrangement of its subunits

Definitions

• the invention relates to a method and an apparatus for producing sacks of tubular bag bodies, wherein the bag body preferably made of a fabric of plastic tapes or a nonwoven plastic material (eg plastic fleece) or a composite of the fabric of plastic tapes and the nonwoven plastic material or with a a plastic film connected to a network structure are produced, wherein the material optionally at least one side with at least one plastic layer and / or at least one plastic film, eg an OPP film is coated.
• the bag body preferably made of a fabric of plastic tapes or a nonwoven plastic material (eg plastic fleece) or a composite of the fabric of plastic tapes and the nonwoven plastic material or with a a plastic film connected to a network structure are produced, wherein the material optionally at least one side with at least one plastic layer and / or at least one plastic film, eg an OPP film is coated.
• the bag bodies are transported on a transport device lying flat transversely to its longitudinal extent at a transport speed in a transport direction, wherein the bag body undergo processing stations during their transport, with which at least one end portion of each bag body formed into a cross bottom and optionally a cover sheet is applied to the cross bottom.
• 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 portions 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 arises at the front and rear of this end portion each have a triangular corner impact.
• valve blades can be inserted (for producing “box valve bags” that can be filled with filler through the valve) and the final floor configuration is made by overlapping the bottom side doors.
• 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.
• tubular bag bodies are fed transversely to its longitudinal extension of a continuously moving transport device and go through their transport different processing stations, such as a bottom opening device.
• a clothing plant is shown schematically in FIG.
• the throughput of bag bodies by the Sackkonfetationierstrom essentially of the transport speed (V) of the transported bag body and the repeat depends.
• bag bodies of small width (b) resulting from the fixed repeat (x) relatively large distances (y) between the bag bodies (10), which prevent the transport potential of the Sackkonfetationieranlagen is fully utilized.
• a further disadvantage of the fixed set repeat is that hot air welders needed for attaching the ground cover sheets run empty between the successive bag bodies, whereby considerable energy in the form of hot air is released to the environment unused as a shutdown and Restarting the hot air welding devices between successive sacks for technical process reasons is not possible.
• the device according to the invention and the method according to the invention for producing sacks from tubular bag bodies are particularly suitable for processing bag bodies which are made of a fabric made of plastic tapes or a nonwoven plastic material (eg plastic fleece) or a composite of the fabric made of plastic tapes and the nonwoven fabric.
• Plastic material or a plastic film connected to a network structure are made, wherein the material is optionally coated on at least one side with at least one plastic layer and / or at least one plastic film, such as an OPP film.
• the bag bodies are transported lying flat transverse to their longitudinal extent at a transport speed in a transport direction, wherein formed on the bag bodies during their transport at least one end portion to a cross bottom and optionally a cover sheet is applied to the cross bottom.
• To be transported bag body are moved by at least one transfer device in relation to transported at transport speed bag body by a feed distance in the transport direction and then moved at the transport speed, wherein the movement of the bag body on the feed path at least partially takes place at a transfer speed which is greater than the transport speed.
• the length of the repeat is adjusted and can be adjusted to a predefined distance between adjacent bag bodies by the feed distance is calculated and controlled in dependence on the width of the bag body so that the predefined distance between successive bag bodies or between the cover sheets sequentially Sack body results.
• a particularly good utilization of processing stations, such as a hot air welding station is achieved when the feed distance is selected so that successive bag bodies overlap, preferably the overlap width corresponds to the single or double height of the triangular corner impact, which results when turning the bottom side flaps.
• the overlap width corresponds to the single or double height of the triangular corner impact, which results when turning the bottom side flaps.
• the transfer device comprises a first transport device and a second transport device, the bag body move lying transversely to its longitudinal extent in the transport direction, the first transport device upstream of the second transport device is arranged and the transport speed of the first transport device is higher than the transport speed the second transport device.
• an overlapping arrangement of the bag body can be achieved with little equipment.
• the device according to the invention for producing sacks of tubular bag bodies has proved to be particularly efficient when the processing stations comprise a bottom opening station and the transfer device is arranged downstream of the bottom opening station. So that the device according to the invention can be operated automatically, the width of the bag body is detected by a sensor.
• the speed with which bag body can be moved on the feed line be controlled according to a speed profile.
• the speed profile includes accelerating to the transfer speed and, after a length of time dependent on the length of the feed distance, braking to the transport speed.
• the bag making can be further improved and automated even higher, if based on the detected bag width and the predefined distance of successive bag body, the cover sheet nominal position and the desired length of the cover sheets and optionally calculates the desired valve leaf position of valve leaves and based on this information cover sheets are cut to the desired length and applied to the bag body when they have reached the cover sheet set position, and optionally the valve sheets are applied to the bag body when they have reached the desired valve leaf position ,
• the transfer device preferably has holding means for gripping, holding and releasing the bag body, wherein the holding means can be designed as mechanical grippers and / or vacuum cups.
• a controller controls the times at which the holding means grasp and release the bag bodies. If at least two holding means are provided which are movable independently of one another, it is possible by means of suitable control to align misaligned bag bodies by different movements of the holding means. Misalignments may e.g. caused when cutting the bag body.
• Fig. 1 shows a schematic representation of a Sackkonfedictionierstrom according to the
• FIG. 2 shows a perspective view of a bag making machine according to an embodiment of the invention.
• FIG. Figures 3 and 4 show plan views of bag bodies during their transport on the transport device, showing the distances between successive ones
• Figures 5 and 6 show plan views of bag bodies during their transport on the transport device, showing the distances between successive ones
• Fig. 7 shows a schematic representation of another embodiment of a
• Fig. 8 shows schematically a transport device of a Sackkonfedictionierstrom according to the prior art.
• the device 1 comprises a transport device 2, which transports the bag body 10 lying flat transversely to its longitudinal extension L at a transport speed V in a transport direction T.
• the bag bodies have a front side edge 11 and a rear side edge 12, between which the width b is measured.
• Guide rails 3 hold the bag body 10 in the correct position on the transport device.
• the bag bodies 10 are made of a stretched plastic tape fabric or a nonwoven plastic material (eg, nonwoven fabric) or a composite of the fabric of plastic tape and the nonwoven plastic material or a plastic film bonded to a net structure and are preferably provided with a coating of a polymer , Composites may also include plastic films, paper sheets or metal foils.
• the coating preferably has a layer of an OPP film, furthermore printing layers, etc.
• a hose 10a is fed from a storage device or an inline hose-forming machine, not shown, to a cross-cutting device 8 which cuts tubular bag bodies 10 from the hose 10a and feeds them to the transfer device 4 described in detail below.
• the bag body 10 through processing stations with which at least one end portion 13 of each bag body 10 is formed into a cross bottom and a cover sheet 19 is applied to the cross bottom.
• the processing stations described below are formed. In other embodiments of the invention However, not all of these processing stations realized, or there may be other processing stations (quality inspection, printing device, etc.) are provided.
• a folding station 30 serves to fold the end portions 13 of the bag body 10 from the flat state about the guide rails 3 upwards.
• a bottom opening station 40 is used to pull the two folded-up layers of the end portions 13 of the bag body 10 from each other and fold in opposite directions by 90 °, creating an open bottom 17 is formed, which has two side flaps 15, 16, of which a side flap 16 to 180 ° is folded back onto the wall of the bag body 10. By folding over the side flaps 15, 16 is formed at the front and rear of the open bottom 17 each have a triangular Eckeinschlag 14.
• a valve sheet 18 is placed on the open bottom 17 of the bag body 10 and optionally by gluing or thermal welding fixed. Thereafter, in a bottom forming station 60, the final cross-bottom configuration is made by wrapping the bottom side flaps 15, 16, while the triangular envelopes 14 are reduced in size at the front and rear bottom end portions, but are retained in their triangular shape. Since the side flaps 15, 16 are folded over at mutually parallel folding edges, the triangular envelopes have the shape of an isosceles triangle whose hypotenuse extends between end points of the folded edges. The embossed bottom side flaps 15, 16 are glued together depending on the material of the bag body or thermally welded when they overlap each other.
• a cover sheet applicator station 70 for applying a bottom cover sheet 19 to the embossed bottom side flaps 15, 16 and a hot air welding station 80 for fixing the bottom cover sheet 19 on the embossed bottom side flaps 15, 16 are also provided.
• the topsheet application station 70 and the welding station 80 may be integrated with one another.
• a gluing station can also be provided.
• the device 1 has a transfer device 4, the bag body 10 are supplied either transversely or longitudinally.
• the transfer device 4 passes the supplied bag body 10 in transverse arrangement on the transport device 2 by means of a movement in the transport direction T.
• Invention s moves the transfer device 4 to be transported bag body 10 with respect to transported at transport speed V bag body by a feed distance ⁇ y in the transport direction T and passes them then to the Transport device 2, wherein the transfer device 4, the bag body 10 moves in the transport direction T at least partially with a transfer speed U, which is greater than the transport speed V.
• the feed distance ⁇ y can thus be calculated as follows:
• Feed distance ⁇ y bag body distance yl - bag body distance y2
• the throughput of bag bodies 10 can be increased by the device 1 at a constant transport speed T.
• the transfer device 4 may comprise retaining means 4b for gripping, holding and releasing the bag bodies.
• the holding means 4b are designed as mechanical grippers, which are fastened to endless belts 4a revolving around pulleys 4c, 4d.
• One of the pulleys 4c is driven by a drive 7 which is (automatically) controlled by a controller 6 which can also drive the holding means 4b.
• the holding means 4b may also be designed as vacuum cups.
• the controller 6 the feed distance ⁇ y can be calculated and changed. Further, the controller 6 can control the speed of the drive 7 and controls the timings at which the holding means 4b grip and release the bag bodies 10.
• the processing stations 30, 40, 50, 60, 70, 80 provided in the apparatus 1 are also single drives, for example controlled by the control 6 , Switches and actuators equipped to respond to the variable bag distances.
• the connection of the controller 6 with the transfer device 4 and the processing stations 30, 40, 50, 60, 70, 80 is not shown in FIGS. 1 and 2. This connection is either point-to-point (serial or parallel), or a network connection.
• the controller 6 includes a computer, with which the feed distance ⁇ y depending on the width (b) of the bag body 10 can be calculated so that there is a predefined distance y2 between successive bag bodies 10, 10 or between the cover sheets of successive bag body (distance y3, see Fig. 1).
• the controller 6 controls the transfer device 4 according to the calculated feed distance ⁇ y.
• a sensor 5 for detecting the width b of the bag body 10 is provided.
• the sensor 5 sends the detected width b to the controller 6.
• the sensor 5 may be camera-supported, for example, or detect the width b by means of light barriers.
• the feed distance ⁇ y is varied according to the invention as a function of the bag body width b and thus changes the length of the repeat.
• the distance y2 between the bag bodies 10 can thus be kept constant even with different bag body widths b.
• the controller 6 controls the speed with which the transfer device 4 moves the bag bodies in the transporting direction T according to a speed profile.
• This speed profile includes the acceleration of the recorded bag body, which are supplied to the transfer device 4 at a speed lying between 0 and the transport speed V, on the transfer speed U and after a distance of the length of the feed stretch ⁇ y dependent period of deceleration to the transport speed V.
• the controller 6 can calculate the desired position and desired length of the cover sheet 19 and optionally the desired position of a valve sheet 18 and control the cover sheet application station 70 based on this information she tailor a cover sheet 19 according to the desired length and applies it to the bag body 10 when it has reached the desired position.
• the controller 6 controls the valve sheet insertion station 50 so that it applies a valve sheet 18 to the bag body 10 when it has reached the desired position.
• the efficiency of a hot-air welding device 80 for fixing the bottom cover sheets 19 is increased because the idling and the energy loss are minimized by unused emitted heat.
• the feed distance ⁇ y is selected so that a predefined distance y2 between successive bag bodies is between 0 (i.e., the bag bodies are flush, see Fig. 3) and 5 cm (see Fig. 4).
• y2 the distance between successive bag bodies is between 0 (i.e., the bag bodies are flush, see Fig. 3) and 5 cm (see Fig. 4).
• this distance is further reduced by overlappingly arranging adjacent bag bodies 10, 10 to the extent of the height h of the triangular envelopes. In mathematical terms, this results in a distance of -h between adjacent bag bodies. In order to bring the distance between the cover sheets 19 of adjacent bag bodies 10, 10 to 0, i.
• the overlap width of adjacent bag body 10, 10 can be selected as twice the height h of the triangular Eckeinschlags, resulting in a distance of -2h.
• the extremely reduced distances between adjacent bag bodies 10, 10, as shown in Fig. 5 and Fig. 6, are not suitable for each subsequent processing station.
• the bag bodies 10 are pushed together by the transfer station 4 in Fig. 1 already at the transfer station that they overlap, folding the end portions 13 upwards at the folding station 30 and the opening of the end portions 13 at the bottom opening station 40 would not be possible.
• extremely close distances between the adjacent bag bodies also have the advantages described above.
• the present invention therefore also provides that the distances between adjacent bag bodies 10, 10 are reduced in several stages by arranging a plurality of transfer devices 4 according to the invention along the transport device 2.
• the distance may also be reduced stepwise with a second transfer station to the bottom opening station 40 and a third transfer station 4 directly in front of the cover sheet application station 70.
• the transport device 2 is divided into a first transport device and a second transport device, the bag body 10 move flat transverse to its longitudinal extent L in the transport direction T, wherein the first transport device is disposed upstream of the second transport device and the transport speed of first transport device is higher than the transport speed T of the second transport device.
• the transport speed of the first transport device thus corresponds to the transfer speed U.
• the processing stations such as soil opener, valve inserters and cover sheet applicators must be equipped with individual drives in order to respond to the variable bag distances.

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• 2014
  • 2014-11-04 EP EP14191600.7A patent/EP3017940B1/de active Active
• 2015
  • 2015-11-02 CN CN201910447922.XA patent/CN110154448B/zh active Active
  • 2015-11-02 BR BR112017007870-8A patent/BR112017007870B1/pt active IP Right Grant
  • 2015-11-02 CN CN201580059770.6A patent/CN107073862B/zh active Active
  • 2015-11-02 WO PCT/EP2015/075409 patent/WO2016071261A1/de active Application Filing

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