EP4214125A1 - Verfahren und vorrichtung zur ausgabe einer folienbahn für packgut - Google Patents
Verfahren und vorrichtung zur ausgabe einer folienbahn für packgutInfo
- Publication number
- EP4214125A1 EP4214125A1 EP22701533.6A EP22701533A EP4214125A1 EP 4214125 A1 EP4214125 A1 EP 4214125A1 EP 22701533 A EP22701533 A EP 22701533A EP 4214125 A1 EP4214125 A1 EP 4214125A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film web
- rollers
- film
- goods
- supply roll
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229920006302 stretch film Polymers 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000004806 packaging method and process Methods 0.000 claims abstract description 17
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000012905 input function Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
- B65B11/045—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated by rotating platforms supporting the articles
-
- 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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/006—Helical strip wrapping combined with roping
-
- 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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/04—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material the articles being rotated
-
- 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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/58—Applying two or more wrappers, e.g. in succession
- B65B11/585—Applying two or more wrappers, e.g. in succession to stacked articles, e.g. pallettised loads
Definitions
- the invention relates to a method for dispensing a stretch film web for wrapping goods to be packaged (packaged goods), according to the preamble of claim 1 .
- the invention also relates to a corresponding device according to the preamble of claim 10.
- the method or the device can provide for the goods to be packaged to be arranged on a pallet.
- Stretch film is stretchable plastic film. It is also known as stretch film.
- EP 2 091 819 B1 discloses a packaging machine with an output device for a web of stretch film and a turntable for receiving a pallet with goods to be packaged.
- the dispenser and the turntable are connected to each other by a rigid connecting element.
- a free end of the stretch film web is unrolled from a supply roll and attached to the pallet or the goods.
- By turning the pallet with the goods using the turntable more film is unrolled and wrapped around the pallet and the goods from bottom to top, by moving a carriage, on which the supply roll with the stretch film web is arranged, vertically from bottom to top along a column becomes. After the goods have been adequately wrapped in film, the turntable is stopped and the film portion used for packaging is separated from the remaining film supply.
- DE 31 06 845 C2 discloses a generic method and a generic device for producing a packaging unit.
- the packaging unit consists of several objects that are put together in layers and have separating gaps between them. It is provided that a film web before wrapping the objects in the Gather the area of the film web edges to edge strands with increased material concentration. The area between the two edge strands remains unshirred.
- One device for edge gathering comprises two vertically spaced, horizontally oriented rods. Since this distance is kept smaller than the width of the film web, the edge regions of the film web are gathered up when the web is passed vertically between the rods. Since the edge strands dig into the outer surface of the layers of the packaged goods due to their increased material concentration, the packaged goods have a special hold.
- the invention is therefore based on the object of making available a generic method with which gathering of a film web that is uniform over its width is possible before the goods to be packaged are wrapped around it. Furthermore, the invention is based on the object of providing a generic device which offers this possibility when used within a packaging machine.
- the object relating to the method is solved by the features of claim 1.
- the stretch film web to be dispensed is rolled up on a rotatably mounted supply roll.
- a starting end of the film web is attached to the goods or a pallet on which the goods are located, and then a relative rotary movement between the goods and the film web is initiated.
- this rotational movement can be accomplished in a number of ways.
- the wrapping takes place in an essentially vertically aligned manner, ie the surface of the goods to be wrapped is aligned vertically.
- the height of the supply roll can preferably be adjusted relative to the item. It it can be provided that the wrapping takes place from bottom to top or vice versa.
- the wrapping is carried out in a spiral manner, it also being possible for several wrappings to be provided one on top of the other.
- the film web or a section of it is gathered after it has left the supply roll and before it reaches the item to be wrapped.
- the width of the film web is reduced or compressed, so that the film puckers, i.e. it falls into folds, and this results in a higher concentration of material within the film web.
- the film web is evenly gathered across its width. In this way, a uniform increase in the material concentration over the width of the film web is achieved in comparison to the material concentration immediately after unrolling from the supply roll.
- Such a strand corresponds to the compression of the film web section transversely or at a right angle to its direction of movement and over its entire width.
- Such a film strand can be a few centimeters wide, for example, depending on the width of the film web, in particular less than 5 cm or less than 3 cm wide.
- the above film web section that is gathered is a running section, i. H. Foil web material unrolled from the supply roll constantly moves through this section. Spatially, this section lies within an area that is delimited by the point where the moving film web leaves the supply roll and the point where the film web reaches the item to be wrapped.
- the running section may be smaller than the stated range.
- the width of the film web is correspondingly reduced, as mentioned, right up to the possibility that it only forms one strand.
- the wrapping of goods will be provided in such a way that the strength of the gathering is varied.
- the item can be wrapped in height with differently shirred and also partially unshirred film, whereby different levels of support are generated for the item, but of course different amounts of film material are used.
- the film web can therefore be adapted in its effect of giving stability to the item, depending on the requirement.
- the film web runs between at least two rollers which are arranged in parallel, with an outer surface of the film web running along one of the two rollers and an opposite inner surface of the film web running along the other of the two rollers is guided.
- the two rollers assume an angle relative to the vertical which is greater than 0 degrees and amounts to a maximum of 90 degrees. In this way it is achieved that the film web in its entire width - without being compressed immediately when leaving the supply roll - no longer runs parallel to the vertical, but occupies an angle to the vertical that is greater than 0 degrees, which results in an inclined position relative to the vertical means. If the angle is 90 degrees, the web of film is orthogonal to the vertical. In this orientation, the film web meets the goods to be packaged, which essentially have a vertical surface. The inner surface of the film web usually points towards the good, the outer surface away from it, but it would also be possible vice versa.
- a compression of the film web thus takes place between leaving the supply roll and the impact of the film web on the surface of the goods.
- the compression of the film web begins behind the second roller in the direction of movement, in particular this can be directly behind the second roller. However, it is also possible for the compression to begin at a distance behind the second roller.
- the film web is in contact with the item, its width is reduced in accordance with a projection onto the vertical. In the extreme case of an angle of 90 degrees between the two rollers and the vertical, when the film web comes into contact with the goods, a film strand of a small width is produced.
- the rollers are infinitely adjustable with respect to their angle to the vertical. This makes it possible to adjust the material concentration of the film web as required when the film is in contact with the item.
- the supply roll and the rollers have an unchanged distance from one another and their height can be adjusted relative to the goods to be packaged.
- the goods can be wrapped over their entire height.
- respective longitudinal axes of the supply roll and the rollers are preferably always kept parallel to one another.
- the fixed distance between the supply roll and the rollers allows for easy film guidance. If the height adjustment is infinitely variable, the goods can be optimally wrapped. In particular, a variable overlapping of film wrappings on the item is possible.
- the rollers are for easy height adjustment arranged on a carriage which can be moved along a column to adjust its height relative to the good.
- the goods to be packaged can be arranged on a turntable which has a rigid connection to the column.
- the turntable can be rotated about an axis, which can also be referred to as the packaging axis.
- the item could also stand still and the delivery area of the film web could rotate around the item.
- the latter can be done, for example, in that the supply roll or the output area of the stretch film web is attached to an arm of the output device that rotates around the product, or to a slewing ring that can be moved from top to bottom in rotation over the product.
- the surfaces of the rollers are designed in such a way that they adhere to the film web, and the rotational speeds of the at least two rollers are different, so that a section of the film web located between the two rollers is stretched .
- This can be achieved in particular in that a roller arranged later in the course of the film web rotates faster than a roller arranged in front of it.
- the latter roller can also be referred to as a braking roller. If the static friction between the film and the rollers and the difference in the rotational speeds of the rollers are adjusted accordingly, a desired stretching of the stretch film can be achieved.
- the output device has a holder for a supply roll of stretch film and also means for gathering the film web.
- the height of the supply roll can preferably be adjusted relative to the product, and the height of the gathering means can preferably also be adjusted relative to the product.
- the gathering means are designed in such a way that the film web, after it has been attached at a starting end to the crop or adjacent thereto, e.g. on a pallet, for vertically oriented wrapping of the crop, it is gathered within a running portion of the web of film which is within the area between the supply roll and the Good to be wrapped is located.
- the gathering means are designed in such a way that they gather the film web uniformly over its width. This means that the film web is compressed to a smaller width due to the formation of folds. This gathering process ends when the film web has reached the goods within the section mentioned.
- the intended intensity of the gathering can vary over the course of the wrapping process; in particular, gathering can only be provided at times. According to the invention, there is a maximum of gathering when the film web section forms only one strand (see above).
- the gathering means preferably have two rollers aligned in parallel, between which the film web runs in such a way that one of the film web surfaces runs over one of the two rollers. It is provided that the alignment of the two rollers can be adjusted in such a way that they are aligned obliquely to the vertical, with a horizontal alignment position also being possible.
- rollers Preferably, it is possible to steplessly adjust the rollers between a vertical and a horizontal alignment position. This means that the material concentration per unit of length in the width of the film web can also be continuously adjusted.
- the supply roll and the rollers are preferably fastened to a roll carrier, with their three longitudinal axes being at a fixed distance from one another and the roll and the rollers having the same height are adjustable relative to the item to be packaged by adjusting the height of the roller support.
- the item can be completely wrapped around in a simple manner.
- the three longitudinal axes of the supply roll and the rollers are always parallel to one another, which enables simple film guidance.
- the device is preferably designed in such a way that the height adjustability of the roller carrier is stepless.
- the gathering means can be arranged on a carriage, the height of which can be moved along a column relative to the goods to be packaged. This allows the gathering means to move very precisely and stably.
- the roller carrier can be arranged on a carriage.
- the rollers are designed so that they can take an angle of 0 to 90 degrees to the direction of movement of the carriage. It is thus possible to adjust the intensity of the gathering, namely between a non-existent and a maximum gathering.
- the method according to the invention and the device according to the invention are preferably designed in such a way that the speed at which the film web is unrolled from the supply roll can be controlled as a function of the film requirement. This makes it possible to feed a constant amount of film to the goods in a controlled manner, based on the area to be wrapped. In this way it is taken into account that the good usually is not circular, but has, for example, a square or rectangular cross-section and, when wrapping a corner, more film is required for a constant wrapping due to the maximum radius given there.
- FIG. 1 shows a schematic and perspective view of a device according to the invention for dispensing a web of stretch film together with a firmly connected turntable on which the goods to be packaged are located
- FIG. 2 shows a plan view of the device according to FIG. 1,
- FIG. 3 shows the plan view according to FIG. 2, but with a roller carrier, which is shown in a sectional view, being in a position pivoted out of a basic position,
- FIG. 5 shows the roller carrier according to FIG. 4 in the pivoted position.
- FIG. 1 shows a packaging machine 1 which has a dispensing device 2 according to the invention and a turntable 3 .
- the turntable 3 is firmly connected to the dispensing device 2 by means of a base frame 5 .
- Goods 6 to be packaged are located on the turntable 3 and are arranged on a pallet 7 .
- the output device 2 has a column 8 and a roller carrier 9 which can be moved vertically along the column 8 by means of a carriage 12 .
- a stretch film supply roll 14 is arranged on the roll carrier 9 .
- the roller carrier 9 is in a basic position. In this basic position are two rollers 16 and 17 with their Long axis aligned vertically. A film web 19 is guided from the stretch film supply roll 14 via a deflection roller 20 to the roller 16 and from there to the roller 17 and then in a section 19a to the pallet 7 or the item 6 (not shown in FIG. 2).
- the turntable 3 is arranged on a subframe (not shown) of the base frame 5 and has two lifting fork recesses 22 and a series of rollers 23 so that it can be rotated about a packaging axis 24 by means of a motor (not shown).
- the supply roll 14 with the stretch film is arranged on a spool 27, being held by the force of a spring 28.
- FIG. By means of two gears 30 and 31 and a guide 32 in the carriage 12, the roller carrier 9 can be pivoted by a maximum of 90 degrees to the vertical around its center of gravity 29 by means of a motor 33 (see FIG. 1), as illustrated in FIG .
- a motor 33 see FIG. 1
- the packaging machine 1 is shown with a position of the output device 2 pivoted by 90 degrees. Good 6 is not shown in FIGS.
- the rollers 16 and 17 each have a servomotor 34 and 35 by which they are driven by means of a respective belt drive 37 and 38, respectively.
- the rollers 16, 17 are provided with such a surface that the stretch film adheres to them.
- the rollers 16, 17 are intended to pre-stretch the unrolled web of stretch film 19 before it reaches the pallet 7 or the item 6.
- the roller 17 is driven at a higher speed than the roller 16, so that the roller 17 can also be referred to as a pre-stretching roller and the roller 16 as a braking roller. Due to the difference in the rotational speed and the adhesion of the film on the roll surfaces, the stretch film section between the two rolls 16 and 17 is stretched.
- the film web 19 unrolled from the supply roll 14 is also parallel with its surfaces to the roller support 9 after it has left aligned vertically. This means that the film web 19 will rest against the at least substantially vertically aligned peripheral surface of the item 6 without being compressed. However, if the roller support 9 assumes an angle greater than zero degrees with the vertical due to a corresponding pivoting, the film web 19 will have a corresponding angle with the vertical immediately when it leaves the roller 17. When it hits the peripheral surface of the item 6 to be packaged, the width of the film web 19 will, of course, again be aligned essentially vertically—like the peripheral surface.
- the film web section 19a hits the item 6 and is gathered beforehand in such a way that it only forms a strand 19b of small width or thickness on the item 6. Due to its high material density, such a strand 19b has a very high level of strength and can therefore form a very high counterforce to the corresponding shearing forces of the item 6.
- the height at which the film web hits the item 6 can be achieved by adjusting the height of the carriage 12 accordingly.
- the output device 2 has a controller 39 with an input function.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021100440.3A DE102021100440A1 (de) | 2021-01-12 | 2021-01-12 | Verfahren und Vorrichtung zur Ausgabe einer Folienbahn für Packgut |
PCT/EP2022/025005 WO2022152578A1 (de) | 2021-01-12 | 2022-01-10 | Verfahren und vorrichtung zur ausgabe einer folienbahn für packgut |
Publications (3)
Publication Number | Publication Date |
---|---|
EP4214125A1 true EP4214125A1 (de) | 2023-07-26 |
EP4214125B1 EP4214125B1 (de) | 2024-01-24 |
EP4214125C0 EP4214125C0 (de) | 2024-01-24 |
Family
ID=80123077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22701533.6A Active EP4214125B1 (de) | 2021-01-12 | 2022-01-10 | Verfahren und vorrichtung zur ausgabe einer folienbahn für packgut |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4214125B1 (de) |
DE (1) | DE102021100440A1 (de) |
PL (1) | PL4214125T3 (de) |
WO (1) | WO2022152578A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202022103806U1 (de) * | 2022-07-07 | 2022-11-17 | Sina Voss | Vorrichtung zur Ausgabe einer Folienbahn für Packgut |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4387548A (en) | 1979-11-21 | 1983-06-14 | Lantech, Inc. | Power assisted roller-stretch wrapping process |
DE3106845A1 (de) | 1980-02-27 | 1982-01-14 | Joseph R. 40223 Louisville Ky. Lancaster | "verfahren zum herstellen einer verpackungseinheit aus mehreren gestapelten teilen durch umwickeln mit einer streckfolienbahn" |
US4712686A (en) * | 1980-09-08 | 1987-12-15 | Lantech, Inc. | Power assisted roller-stretch apparatus and process |
FR2572359B1 (fr) | 1984-10-25 | 1987-09-25 | Newtec Int | Procede et machine pour recouvrir les faces laterales d'une charge avec une bande de film en matiere plastique |
FR2651481B1 (fr) | 1989-09-06 | 1991-12-20 | Newtec Int | Chariot de devidement de film pour machine d'emballage. |
DE59903939D1 (de) | 1999-04-23 | 2003-02-06 | Rpp International Ltd | Verfahren zum wickeln eines in einer rundballenpresse gepressten rundballens, folienumwicklungsvorrichtung und rundballenpresse mit einer solchen folienumwickelungsvorrichtung |
US7568327B2 (en) * | 2003-01-31 | 2009-08-04 | Lantech.Com, Llc | Method and apparatus for securing a load to a pallet with a roped film web |
CA2457997A1 (en) * | 2003-02-18 | 2004-08-18 | Cousins Packaging Inc. | Stretch wrap threading device |
FI114308B (fi) * | 2003-03-21 | 2004-09-30 | Haloila M Oy Ab | Rypytyslaite |
US7775016B2 (en) * | 2004-11-03 | 2010-08-17 | Cousins Neil G | Stretch wrap machine with top corner film transfer |
ITMO20060396A1 (it) | 2006-11-30 | 2008-06-01 | Robopac Sa | Apparato a tavola rotante per macchina avvolgitrice |
ITMO20110107A1 (it) * | 2011-05-10 | 2012-11-11 | Aetna Group Spa | Apparato di avvolgimento |
US10279945B2 (en) | 2012-10-22 | 2019-05-07 | Encore Packaging Llc | Stretch film roping |
-
2021
- 2021-01-12 DE DE102021100440.3A patent/DE102021100440A1/de active Pending
-
2022
- 2022-01-10 PL PL22701533.6T patent/PL4214125T3/pl unknown
- 2022-01-10 EP EP22701533.6A patent/EP4214125B1/de active Active
- 2022-01-10 WO PCT/EP2022/025005 patent/WO2022152578A1/de active Search and Examination
Also Published As
Publication number | Publication date |
---|---|
PL4214125T3 (pl) | 2024-06-10 |
EP4214125B1 (de) | 2024-01-24 |
WO2022152578A8 (de) | 2023-02-23 |
WO2022152578A1 (de) | 2022-07-21 |
EP4214125C0 (de) | 2024-01-24 |
DE102021100440A1 (de) | 2022-07-14 |
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