EP0670799B1 - Verfahren und einrichtung zum automatischen verschliessen von transportsäcken - Google Patents

Verfahren und einrichtung zum automatischen verschliessen von transportsäcken Download PDF

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Publication number
EP0670799B1
EP0670799B1 EP94926767A EP94926767A EP0670799B1 EP 0670799 B1 EP0670799 B1 EP 0670799B1 EP 94926767 A EP94926767 A EP 94926767A EP 94926767 A EP94926767 A EP 94926767A EP 0670799 B1 EP0670799 B1 EP 0670799B1
Authority
EP
European Patent Office
Prior art keywords
bag
process according
height
gusset
grooving
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.)
Expired - Lifetime
Application number
EP94926767A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0670799A1 (de
Inventor
Markus NÜTZI
Peter Näf
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.)
Buehler AG
Original Assignee
Buehler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CH297793A external-priority patent/CH687977A5/de
Priority claimed from CH13694A external-priority patent/CH687978A5/de
Application filed by Buehler AG filed Critical Buehler AG
Publication of EP0670799A1 publication Critical patent/EP0670799A1/de
Application granted granted Critical
Publication of EP0670799B1 publication Critical patent/EP0670799B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/02—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks
    • B65B7/06—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap
    • B65B7/08—Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks by collapsing mouth portion, e.g. to form a single flap and folding

Definitions

  • the invention relates to a method for automatically closing transport bags after filling with a bulk material according to the preamble of claim 1, and a device for performing the method.
  • the method according to the invention and the associated device are used in particular when bagging and closing transport bags (preferably paper bags) for large packaging (approx. 10-50 kg) of flours, animal feed and the like. the like
  • valve bags In the case of so-called valve bags, the closure is relatively unproblematic due to the filler opening which can be closed in the manner of a valve, but for reasons of bagging performance, the empty bag price and sanitation are only used to a limited extent for food and feed.
  • EP-A-123784 it is proposed to loosen a paper layer by a few centimeters before the fold and to subsequently glue the flaps thus formed as protective flaps over the fold directly to a point on the sack material that lies outside the fold. This can provide additional protection for the bag closure against peeling, even if the adhesive is not optimally attached.
  • a disadvantage here is also a complication of the folding process, which can impair reliability, in particular with high system performance. It is also only used for multi-layer paper.
  • the invention is based on the object, while avoiding the disadvantages of the prior art, to develop a method for the automatic closing of transport bags, which makes it possible to close the transport bags simply and precisely with a capacity of approx. 1200 bags per hour and packaging masses of to achieve at least 5 kg to approx. 50 kg per sack.
  • This object is achieved according to the characterizing features of claims 1 and 15.
  • the invention is also based on the object of providing a device for carrying out the method, with a high degree of flexibility with regard to the size and shape of the bags used, preferably being made of paper.
  • the sack is on a horizontal base, a transport element, preferably a conveyor chain, and its position is monitored by sensors.
  • the transport element is adjustable in height and has a secure longitudinal stabilization. This makes it possible to use simple, trapezoidal height adjustment elements.
  • the sack After filling and placing on the transport element, the sack is moved constantly and constantly, also to avoid kinking the sack.
  • the device for carrying out the method according to the invention is distinguished by a comparatively low mechanical outlay and space requirement.
  • robotic means and sensors enables not only precise movements but also the recording of manipulated variables in regulated movement sequences.
  • Modified external and internal operating conditions known to those skilled in the art can be used to detect the drifting of manipulated variables.
  • the spreading operation of the sack must already take place precisely and with a defined force.
  • a deep immersion of the expansion elements (knives) in the sack close to the surface of the crop also allows air pockets to be squeezed out well.
  • the preferred use of two inner knives and one gusset knife for placing a gusset results in transverse spreading of the inner knives before the side gusset is pressed in so that the sack is evenly stretched all round. Due to the same side lengths of the front and back of the bag, this not only results in a better appearance, but above all a higher tightness of the closure.
  • the spreading elements are moved in coordination with the transport element.
  • the frictional connection between the spreading knives and the bag wall is used to bring the upper edge of the bag into the correct position by moving the spreading elements up or down with the same drives that perform the diving movement.
  • the sack is preferably drawn into the closing device in such a way that only a horizontal distance from sack to sack is required on the conveyor belt. This is possible for. B. by a double-beak feed system.
  • a parallel positioning of the front beak parts also enables the movable clamping carriage to be moved at a constant distance from the sack. The sack is thereby held in its position even while the spreading knives are being pulled out, while the beaks as the holder of the clamping belt are still not closed.
  • the clamping force in the beak as in the immovable part can be freely selected and waste bags can be removed by releasing the clamping force, if necessary also by selectively releasing the clamping force in the moving or fixed part, in which a missing bag is currently located.
  • the transport element is lowered in parallel.
  • the sack is advantageously folded in several steps. First, the fold is pre-grooved and folded, regardless of the paper thickness.
  • the grooving rollers are cylindrical, so that the upper part of the roller of the second folder can also serve as a press roller for the first folder.
  • the height of the folding devices is preferably adjustable in order to enable any folding width.
  • the folding channel is preferably designed such that tensions in the folding area of the sack can be reduced.
  • Sensors for detecting false sacks are preferably arranged in the area of the pre-grooving (first grooving).
  • the adhesive is applied, the application nozzle preferably being able to be moved in a curve in order to achieve an optimal position of the adhesive bead and a constant distance from the adhesive edge to the first fold to achieve the entire sack width. Independent again on the paper thickness and arched or slightly folded folds.
  • the gluing point is preferably pressed in pairs in order to achieve a high specific pressure, which results in very short pressing times and a low glue requirement due to good distribution and intensive networking with the paper.
  • the device according to the invention allows continuous and low-man operation with high performance, because firstly all movements are carried out in a recipe-controlled manner by means of the robotics means, sensors and controllers, secondly when the conditions change, the recipe-related parameters are automatically updated, and thirdly because the freely programmable axes are program-controlled at all times , can automatically process another sack format (correction after recipe control and readjustment after assessment).
  • the link between the individual stations is the transport element.
  • FIG. 1 shows schematically the combination according to the invention of previous spreading and the alignment of the sack 1, in particular the sack edge 2 shown here.
  • the sack edge 2 can be aligned both horizontally and vertically. It is essential that after the alignment according to the invention, the edge of the bag 2 is guided through the subsequent processing stage 4 at an unchanged height.
  • a clamping conveyor belt 5 is provided, which can be driven synchronously with the transport element 3.
  • the height of the edge of the bag 2 can, for. B. vary by external conditions such as changed product volume with the same weight or different bag mass.
  • the main steps of the sack spreading are shown in FIG.
  • the spreading elements are lowered and the inner knives 6 are preferably immersed in the sack 1 deeply to just above the flour level, while a gusset knife 7 is ready on the outside near the narrow sides of the sack 1.
  • the gusset knife 7 By opening the inner knives 6 in the transverse direction, the sack material is stretched into a rectangle, the gusset knives 7 simultaneously moving inwards and forming the gusset 8.
  • the gusset knife 7 generates an adjustable clamping force on the bag material, which allows the bag opening to be aligned by means of all the knives.
  • the transverse spreading by turning the inner knives 6 outward results in a uniformly stretched sack 1 before the side fold is pressed in.
  • the rotation for transverse spreading is carried out, for example, by pneumatic cylinders, with the piston and piston rod having a pivot point at the front on the piston rod or on the piston itself, so that a Piston rod guide, a separate swivel joint and thus overall length can be saved.
  • the use of two inner knives 6 and one gusset knife 7 allows the placement of a gusset 8 or the use of the gusset knives 7 for expanding bags 1 without a gusset 8, the gusset knives 7 taking the starting position of the inner knives 6 and the inner knives 6 in a parking position Accept the position of the gusset knife 7.
  • the total of six knives 6, 7 move on only two rails, not explicitly shown, with a U-shaped gripping of a holder of the inner knives 6 via a carriage of the gusset knives 7.
  • two motors drive the inner knives 6 and the gusset knives 7 independently of one another on the respective common rails via a traction means in a manner known per se using a forward and returning belt strand.
  • This allows a synchronous, opposite direction of movement of the two matching carriages for inner knife 6 and gusset knife 7.
  • the drive chains for the drive sprocket of the gusset and inner knife belts are preferably also used as bearing points for the deflection pinion of the opposite axis.
  • the drive pinion for the inner knives 6 is preferably fixedly coupled to the shaft, the deflection pinion, the gusset knife 7 is loose.
  • the correct diving start point of the spreading elements is determined by detecting the bag width via light barriers known per se.
  • Weight compensation of the knife holder by compressed air cylinders loaded on one side enables smaller driving forces and thus lighter motors up to the drive of the entire axis.
  • Known robotics including sensors and controls, ensure a precise, real-time movement.
  • a straightening optic which is adjustable in relation to the bag formats to be processed is provided.
  • the directional optics can easily be placed freely in the coordinate system.
  • the regulation of the height of the upper edge of the edge of the sack 2 (and thus also the height of the belt of the transport element) relative to the spreading device is carried out by comparing the detected actual straightening path with a predetermined target straightening path. Drifting the height of the top edge of the sack edge 2, e.g. B. due to different contents, is intercepted by adjusting the height of the belt of the transport element. Permanent observation or manual intervention is therefore not necessary.
  • the sack 1 is drawn into the closing unit by means of a double-beak pull-in system (FIG. 5), whereby a sack spacing on the transport element 3 in the order of the sack width is possible.
  • the beak construction with a double joint enables the front pair of beaks to be placed in parallel, which enables the clamping carriage (clamping conveyor belt 5) to be mounted on clamping carriage rails aligned parallel to the direction of travel of the bag 1 and thus allows the clamping carriage to be moved at a constant distance from the bag 1.
  • the "fully spread" sack 1 is held by the clamping carriage while the inner knives 6 are being moved out of the sack 1 (FIG. 5) in order to avoid changes in the position of the sack 1 at a point in time at which the clamping band is not yet closed, but the inner knives 6 are already move out of bag 1.
  • the clamp carriage is transported back without its own drive simply by frictional engagement on the returning clamp band strand.
  • the sack 1 is clamped for synchronous transport through the closing device by means of vertically guided profile toothed belts, pneumatically pressed on, which enables a freely selectable setting of the clamping force with a low-effort pressure control.
  • the pressure pistons are located in a cylinder that is open at the front, a lip acts as a wiper on the front and a seal on the cylinder side.
  • FIG. 3 shows the main steps in the folding and gluing of the open sack edge 2 of the clamped sack 1.
  • a first pair of grooving rollers 9 produces a first grooving 10 (pre-grooving).
  • the first fold is then produced via a first folding device 12.
  • a second pair of grooving rollers 13 subsequently produces a second grooving 14.
  • An adhesive film 16 is then applied via a glue nozzle 15 in a manner to be described. This is immediately followed by the second folding by a second folding device 17, whereupon the double fold 18 formed is brought to a firm and flat bond in a pair of press rollers 19.
  • the bond point is then passively cooled in a manner known per se by the ambient air and the closed bag 1 is now fed to further treatment (palletizing or the like).
  • the pre-grooving (grooving 10) enables the fold 11 to be loosely folded in a spiral channel of the folding device 12 with little friction and regardless of the paper thickness of the bag 1. Due to the cylindrical design of the grooving rollers 9, 13, the grooving roller 13 can also serve as a press roller for the first fold 11. It is driven only one roller, the second of a pair is driven by the friction on the circumference, so that a mechanical overdrive can be avoided.
  • the fold height and fold position are automatically adjustable, so that the length of the closed bag 1 can be freely selected for the purpose of optimal adaptation to the pallet size.
  • the design of the folding channel as a shaft with parallel side walls, between which the folded sack part runs after passing the spiral folder, enables stresses in the folding area to be reduced, caused by uneven paths through which the leading edge of the fold has to travel in relation to the part in the folding area. This not only results in a straight fold 11, but also the possibility of an extremely short spiral chuck if no higher demands are made on the straightness of the fold 11.
  • false sacks are ejected at the latest at the end of the closing device in order to rule out that such false sacks are placed on a palletizer or the like. reach.
  • the glue nozzle 15 is fixed on a positioning axis perpendicular to the fold axis or arranged to be curved. With a curve control, an adhesive film 16 running parallel to this fold 11 can be applied, in particular also in its initial area, in spite of typically slightly curved / kinked fold 11. Different thicknesses of the adhesive film 16 or an adhesive bead can also be corrected in such a way that the adhesive extends exactly to the lower fold edge after pressing.
  • the applied bead of adhesive or the adhesive film 16 precipitates over the first and last millimeters. After pressing, this affects the width of the adhesive film 16.
  • the curve control is used to correct the resulting fish shape and to align the adhesive edge with the folded edge.
  • the use of a pair of press rollers 19 instead of a conventional, longer press section enables a very high pressure of the adhesive on a line with a low power requirement.
  • the high specific pressure (calender-like) enables the adhesive to be rolled out into a thin film with extensive wetting of the paper right down to the material pores and thus a large adhesive surface. This is important in order to prevent the closure from tearing open even when peeling off.
  • a thin adhesive film 16 is flexible under bending stress, has less tendency to tear open compared to conventionally compressed and thick adhesive points between strips, and less adhesive is used.
  • the cooling time is also shorter and the bag 1 can be loaded as soon as it leaves the press rollers 19.
  • the pressing time is approx. 1/2 second and approx. 80% of the final strength is reached immediately. Extensive tests were unable to identify any peeling problems.
  • the overall length of the closing device is also reduced.
  • the spreading device has independently controllable drives 20, 21 for the inner knives 6 and gusset knives 7, which permit height adjustment on one or both sides and subsequent alignment.
  • the knives can be moved horizontally via a fluid drive or position drive (inner knife 6) and drives, not shown, and a clamping force can be applied accordingly.
  • the spreading device can be moved on a horizontal guide rail 22 parallel to the transport element 3 in order to synchronize the spreader with the bag 1 and to exclude disturbing forces during the spreading.
  • the alignment function is via sensors 23, for. B. light sensor is monitored and can be controlled or regulated by means of a process computer.
  • the filled bag 1 is brought from a bagging station 24 onto the transport element 3, with a side guide 25 holding the bag 1 vertically.
  • the bags 1 should be uniform and spaced short.
  • the transport element 3 (FIG. 6) can be adjusted in height in a coordinated manner using lifting trapezes 26.
  • the use of the integrated machine control sensor system for the simultaneous detection of incorrect behavior of the bags 1 via an object-related memory enables the bags 1 to be ejected at the location provided for this purpose.
  • the use of computer controls also enables the management of sack-specific recipes and automatic programming to other sack formats is possible via freely programmable axes. Incorrect settings when changing formats are almost impossible. Machine- and process-specific peculiarities can be corrected, the controller automatically adjusts to changing internal and external conditions by storing controller values even when working in batches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Fodder In General (AREA)
  • Package Frames And Binding Bands (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)
  • Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
EP94926767A 1993-10-04 1994-09-28 Verfahren und einrichtung zum automatischen verschliessen von transportsäcken Expired - Lifetime EP0670799B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH2977/93 1993-10-04
CH297793A CH687977A5 (de) 1993-10-04 1993-10-04 Verfahren und Vorrichtung zum automatischen Verschliessen von Transportsaecken.
CH13694A CH687978A5 (de) 1994-01-17 1994-01-17 Verfahren und Vorrichtung zum Verschliessen von Transportsaecken.
CH136/94 1994-01-17
PCT/CH1994/000193 WO1995009765A1 (de) 1993-10-04 1994-09-28 Verfahren und einrichtung zum automatischen verschliessen von transportsäcken

Publications (2)

Publication Number Publication Date
EP0670799A1 EP0670799A1 (de) 1995-09-13
EP0670799B1 true EP0670799B1 (de) 1996-06-26

Family

ID=25683629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94926767A Expired - Lifetime EP0670799B1 (de) 1993-10-04 1994-09-28 Verfahren und einrichtung zum automatischen verschliessen von transportsäcken

Country Status (15)

Country Link
US (1) US5890348A (es)
EP (1) EP0670799B1 (es)
JP (1) JP2950994B2 (es)
CN (1) CN1053418C (es)
AT (1) ATE139741T1 (es)
BR (1) BR9406466A (es)
DE (1) DE59400381D1 (es)
DK (1) DK0670799T3 (es)
ES (1) ES2089925T3 (es)
MY (1) MY112107A (es)
RU (1) RU2118275C1 (es)
TR (1) TR28106A (es)
TW (1) TW276234B (es)
UA (1) UA42705C2 (es)
WO (1) WO1995009765A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109466829A (zh) * 2018-09-21 2019-03-15 许昌农科种业有限公司 一种花生种子用封装及机构

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* Cited by examiner, † Cited by third party
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DE102008052633A1 (de) * 2008-10-22 2010-04-29 Khs Ag Verfahren und Vorrichtung zur Herstellung einer Verpackungseinheit
AT509141A1 (de) * 2009-11-23 2011-06-15 Herwig Worff Verfahren zum verschliessen eines sackkörpers
CN102673841B (zh) * 2011-03-07 2015-07-29 上海艾录包装股份有限公司 热封口袋双折弯封口机构
JP6355121B2 (ja) 2012-12-06 2018-07-11 株式会社古川製作所 大容量袋供給装置
US9358748B2 (en) 2013-04-15 2016-06-07 Miller Weldmaster Corporation Back seam welder and method of operation
US20150107196A1 (en) * 2013-10-18 2015-04-23 Hon Sun Jack Lee Pouch Loading System
BR102014030304B1 (pt) * 2014-12-04 2022-04-05 Ball Beverage Can South America S/A Processo de gerenciamento de conjunto de tampas empilhadas e inseridas em uma embalagem, dispositivo de transporte para transportar um conjunto de tampas empilhadas e inseridas em uma embalagem e sistema de produção de conjuntos de tampas paletizados
JP7117201B2 (ja) * 2018-09-07 2022-08-12 株式会社生産日本社 製品入り外袋、製品入り外袋の巻き取り品及びそれらの製造方法並びに袋体の供給方法
DE102019206449A1 (de) * 2019-05-06 2020-11-12 Bausch + Ströbel Maschinenfabrik Ilshofen GmbH + Co. KG Vorrichtung zum Ausrichten einer Verpackung
CN111524271B (zh) * 2020-05-09 2022-01-28 四川大学华西医院 一种口罩售卖机
CN111524272B (zh) * 2020-05-09 2022-01-18 四川大学华西医院 口罩售卖机
CN113353356B (zh) * 2020-09-16 2022-06-28 沅陵县土家王食品有限责任公司 一种调味品包装袋包装打码一体自动化设备
JP2024033435A (ja) * 2022-08-30 2024-03-13 オリオン機械工業株式会社 ガセット袋の封止方法

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US1986043A (en) * 1931-09-04 1935-01-01 Royal Baking Powder Co Method of and machine for closing flexible containers
US2514867A (en) * 1947-04-09 1950-07-11 Pneumatic Scale Corp Method and apparatus for producing a package
DE1043922B (de) * 1953-02-23 1958-11-13 Carl Drohmann Ges Mit Beschrae Vorrichtung an Beutelschliessmaschinen zum Einfalten und Flachlegen des hochstehenden Endes gefuellter Beutel
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BE791232A (fr) * 1971-11-12 1973-03-01 Fischbein Mfg Dave Machine automatique de fermeture de sacs
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109466829A (zh) * 2018-09-21 2019-03-15 许昌农科种业有限公司 一种花生种子用封装及机构

Also Published As

Publication number Publication date
DK0670799T3 (da) 1996-08-26
RU2118275C1 (ru) 1998-08-27
JPH07509681A (ja) 1995-10-26
WO1995009765A1 (de) 1995-04-13
CN1115176A (zh) 1996-01-17
US5890348A (en) 1999-04-06
CN1053418C (zh) 2000-06-14
UA42705C2 (uk) 2001-11-15
TR28106A (tr) 1996-01-08
DE59400381D1 (de) 1996-08-01
TW276234B (es) 1996-05-21
MY112107A (en) 2001-04-30
JP2950994B2 (ja) 1999-09-20
ES2089925T3 (es) 1996-10-01
BR9406466A (pt) 1996-01-23
ATE139741T1 (de) 1996-07-15
EP0670799A1 (de) 1995-09-13

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