US20170081063A1 - Method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, and shaping apparatus for carrying out the method - Google Patents

Method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, and shaping apparatus for carrying out the method Download PDF

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Publication number
US20170081063A1
US20170081063A1 US15/273,364 US201615273364A US2017081063A1 US 20170081063 A1 US20170081063 A1 US 20170081063A1 US 201615273364 A US201615273364 A US 201615273364A US 2017081063 A1 US2017081063 A1 US 2017081063A1
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United States
Prior art keywords
sheathing
pallet
region
shaping
legs
Prior art date
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Abandoned
Application number
US15/273,364
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English (en)
Inventor
Reiner Hannen
Enrico Czok
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MSK Verpackungs Systeme GmbH
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MSK Verpackungs Systeme GmbH
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Filing date
Publication date
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Assigned to MSK - VERPACKUNGS-SYSTEME GMBH reassignment MSK - VERPACKUNGS-SYSTEME GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CZOK, ENRICO, HANNEN, REINER
Publication of US20170081063A1 publication Critical patent/US20170081063A1/en
Priority to US16/921,364 priority Critical patent/US20200331649A1/en
Abandoned 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/54—Wrapping by causing the wrapper to embrace one end and all sides of the contents, and closing the wrapper onto the opposite end by forming regular or irregular pleats
    • 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
    • B65B53/00—Shrinking wrappers, containers, or container covers during or after packaging
    • B65B53/02—Shrinking wrappers, containers, or container covers during or after packaging by heat
    • 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
    • B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
    • B65B35/30—Arranging and feeding articles in groups
    • B65B35/50—Stacking one article, or group of articles, upon another before packaging
    • 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
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/02—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved with means for heating the material prior to forming
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • 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
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/13—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state
    • B65B9/135—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the preformed tubular webs being supplied in a flattened state for palletised loads
    • 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
    • B65B59/00—Arrangements to enable machines to handle articles of different sizes, to produce packages of different sizes, to vary the contents of packages, to handle different types of packaging material, or to give access for cleaning or maintenance purposes
    • B65B59/001—Arrangements to enable adjustments related to the product to be packaged

Definitions

  • the invention relates to a method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, wherein the pallet has a top standing surface as a support for the stack of items and a plurality of bottom legs that are arranged in a manner spaced apart from one another, forming leg clearances, and wherein the sheathing engages at least partially under the underside of the legs arranged in the region of the four outer edges of the pallet (undershrinking), and wherein at least one clearance is introduced into the sheathing region located between two legs which are arranged in a row having at least two legs.
  • the undershrinking method is a method for load securing a stack of items arranged on a pallet.
  • a shrink hood is usually used, which is pulled from above over the stack of items arranged on the pallet and is subsequently shrunk from top to bottom or from bottom to top.
  • the stack of items is wrapped on the four sides and the top side.
  • the shrink hood In the not-yet shrunk state, the shrink hood has a greater length than the stack of items including the pallet, and so, in the not-yet shrunk state, the shrink hood protrudes downwardly with respect to the underside of the pallet.
  • that edge of the shrink hood that protrudes downwardly with respect to the underside of the pallet is heated and consequently contracts under the pallet. As a result, maximum protection and the best possible load stability are achieved.
  • This object is achieved in that at least one clearance is created such that the sheathing region is first of all pulled away from the pallet in the still-hot state, that means after the shrinking of the sheathing region, and is subsequently displaced upwards in the still-hot state, wherein the upwardly displaced sheathing region is then fixed in its upwardly displaced position by cooling. Once the sheathing region has cooled sufficiently, it remains in this position. Consequently, the leg clearance in question is completely free of the sheathing region since the sheathing region has been “laid” around the leg clearance in question.
  • the still-hot state is understood as meaning the state in which the sheathing contracts on account of the heating because of its restoring forces and thus effects load securing through the transverse and longitudinal forces acting on the stack of items.
  • the leg clearances can be reliably made available in this respect.
  • the method according to the invention can be integrated easily into the previous shrinking process and allows the production of durable sheathing.
  • the method can be used for all pallet types and warehouses, wherein the load stability can be set as desired.
  • the upward displacement can take place as far as the region of the standing surface of the pallet, preferably as far as slightly above the standing surface of the pallet.
  • the sheathing can be pulled around the respective lower inner edge of the two legs.
  • the inner edges are understood as being the mutually facing edges of the two legs.
  • the two legs can be directly adjacent.
  • the two legs can alternatively also be the outermost legs of a row. If three legs are arranged in the row, the upwardly displaced sheathing region would thus extend over the central leg. If the pallet has for example five legs in a row, the two legs can also be the second and fourth legs.
  • the sheathing region can be pulled away and/or displaced upwards from the pallet such that the sheathing remains fixed to the underside of the two legs.
  • a shrink hood can be used as the sheathing.
  • At least one subregion of the sheathing prefferably fixed above the sheathing region from the outside in the horizontal direction with respect to the pallet, at least in at least one region close to a leg clearance, preferably by pressure exertion, at least temporarily while the sheathing region is being pulled away and/or displaced upwards. In this way, an undesired half-moon formation is avoided in the region of the side shaped by means of the method according to the invention.
  • At least the upwardly displaced sheathing region that is in the still-hot state can be displaced in the direction of the pallet again before cooling.
  • the sheathing region is displaced closer to the pallet again and can thus be connected to the sheathing laid around the underside of the two legs enclosing the clearance(s), before the sheathing region and the sheathing set as a consequence of cooling.
  • This displacement in the direction of the pallet can take place for example by means of a suitable device which is actively moved in the direction of the pallet to this end.
  • displacement can also take place by restoration as a consequence of a decreasing tensile force which has been applied for example for the initial pulling of the sheathing region away from the pallet in the still-hot state.
  • the displacement at least of the upwardly displaced sheathing region that is in the still-hot state back in the direction of the pallet can take place to such an extent in the direction of the pallet before cooling that the stretched sheathing region and/or those subregions of the sheathing that respectively adjoin the sheathing region laterally is/are pressed at least slightly at the rear against at least one leg and/or the standing surface of the pallet. If the stretched sheathing region is pressed directly against the pallet in such a procedure, the sheathing region sticks to the pallet in the contact region after curing.
  • the invention also relates to a shaping apparatus for carrying out a method for creating at least one clearance in a sheathing that consists of a shrink film and secures a stack of items arranged on a pallet, wherein the pallet has a top standing surface as a support for the stack of items and a plurality of bottom legs that are arranged in a manner spaced apart from one another, forming leg clearances, and wherein the sheathing engages at least partially under the underside of the legs arranged in the region of the four outer edges of the pallet, and wherein at least one clearance is introduced into the sheathing region located between two legs which are arranged in a row having at least two legs.
  • a total of three rows of in each case three legs of block-like design are provided, wherein the three legs in a row are connected together on the underside by a bottom board.
  • the standing surface usually consists of five top boards. Transverse boards can also be arranged between the legs and the standing surface.
  • the undershrinking method is a method for load securing a stack of items arranged on a pallet.
  • a shrink hood is usually used, which is pulled from above over the stack of items arranged on the pallet and is subsequently shrunk from top to bottom or from bottom to top.
  • the stack of items is wrapped on the four sides and the top side.
  • the shrink hood In the not-yet shrunk state, the shrink hood has a greater length than the stack of items including the pallet, and so, in the not-yet shrunk state, the shrink hood protrudes downwardly with respect to the underside of the pallet.
  • that edge of the shrink hood that protrudes downwardly with respect to the underside of the pallet is heated and consequently contracts under the pallet. As a result, maximum protection and the best possible load stability are achieved.
  • the sheathing is preferably pulled around the respective lower inner edge of each of the two legs, such that, as a result, the undershrink is maintained in the two regions of the sheathing that adjoin the upwardly displaced sheathing region laterally, and as a result load securing is provided.
  • the two legs can be for example directly adjacent legs such that a leg clearance is then freely accessible. If the two legs are the outermost legs in a row, at least two leg clearances and also the end side and the underside of the leg(s) located in between are freely accessible.
  • the sheathing can be fixed to the underside of the two legs before and/or after the sheathing region is pulled away from the pallet and/or before and/or after the sheathing region is displaced upwards, or alternatively, the sheathing region can be pulled away and/or displaced upwards from the pallet such that the sheathing remains fixed to the underside of the two legs.
  • the vertical displacement can be an exclusively vertical displacement.
  • the shaping finger in question can also be displaced horizontally during the vertical displacement, such as in a pivoting movement, for example.
  • the shaping apparatus represents an extension of known shrink systems for full pallets through the automated free forming of a leg clearance or of leg clearances of a pallet to ensure the system capability for automated warehousing facilities, in particular high-bay warehouses.
  • the shaping apparatus can be integrated in a shrink machine.
  • the shaping apparatus according to the invention can be integrated easily into an existing shrinking process or an existing shrink machine can be extended by a shaping apparatus.
  • the shaping apparatus according to the invention is distinguished by high variability. It is suitable for different pallet formats, such as the Euro-pallet, the “industrial pallet” (EUR2) or the “Düsselfdorf pallet” (EUR6), for example.
  • the shaping apparatus is integrated into a shrink station, the shaping apparatus is preferably located outside the immediate heating region of the hot-air frame during rest periods and during the undershrinking process, such that the heat input is reduced as a result, cooling is possible and heating up of the shaping apparatus is kept as low as possible. An additional cooling system for the shaping apparatus is then not required.
  • at least one shaping apparatus can be assigned a cooling system. Such a configuration can be appropriate for example when the shaping apparatus is intended to be already displaced in the direction of the pallet during the ongoing undershrinking operation.
  • At least one shaping finger is mounted so as to be pivotable about a pivot pin oriented parallel to the horizontal travel path, such that, for shaping, this shaping finger is pivotable upwards and outwards by means of a drive.
  • the shaping apparatus has two shaping fingers that are each mounted so as to be pivotable about a pivot pin oriented parallel to the horizontal travel path. In their rest position, the shaping fingers point towards one another and are pivoted outwards away from one another for shaping.
  • the sheathing region is displaced upwards and in this way stretched in the manner of a portal, while the sheathing is still located in its original position in the two regions laterally adjoining the sheathing region and thus still engages around the underside of the pallet.
  • At least one shaping finger that is mounted so as to be pivotable about a pivot pin oriented parallel to the horizontal travel path is preferably oriented with respect to the pallet such that the shaping finger is at a distance from the outer side of the pallet during pivoting and thus cannot come into contact with the pallet.
  • the shaping apparatus can have at least two shaping fingers which are displaceable in the horizontal direction to pull the sheathing region away from the pallet.
  • these shaping fingers serve only to pull the sheathing region away, while the shaping fingers that are each mounted so as to be pivotable about a pivot pin oriented parallel to the horizontal travel path effect the upwards displacement of the sheathing region.
  • At least one pivotably mounted shaping finger can be formed and/or arranged in such a way with respect to the shaping finger(s) that is/are displaceable only in the horizontal direction and is/are assigned to the shaping finger that this pivotably mounted shaping finger is not in contact with the sheathing region during the pulling away operation. In this way, the pulled-out sheathing region can be received reliably by the pivotably mounted shaping fingers.
  • the shaping apparatus can have a guide and a drive for a horizontal displacement and/or the shaping apparatus can have a vertical guide and a drive for a vertical displacement.
  • the end of at least one shaping finger can be configured as a tab and/or as a hook.
  • the hook can be for example an angled portion which is provided at the end of the shaping finger in question and projects into the sheathing from below.
  • the tabs or hooks the sheathing region can be pulled outwards away from the pallet. That side or face of a tab or hook that faces the pallet can also be used as a pressing face.
  • the shaping apparatus If, in the subsequently stretched state, the shaping apparatus is displaced horizontally again in the direction of the pallet side that is oriented orthogonally to the conveying direction of the pallet, the shaping fingers press the not-yet cooled double-ply sheathing against the standing surface or the outer side of the leg of the pallet with their faces that face the pallet.
  • the stretched sheathing region and the adjoining sheathing are displaced closer to the pallet again and are connected on cooling to the sheathing laid around the leg, before said sheathing cures, such that additional stabilization is achieved as a result by the sheathing region connected to the adjoining sheathing and/or the pallet.
  • At least one, preferably each, region that comes into contact with the sheathing and/or with the sheathing region is coated and/or provided with a non-stick and/or heat-resistant material.
  • a non-stick material is used, the friction between the shaping finger and the sheathing is reduced such that the sheathing is not damaged.
  • sticking of the hot sheathing to the surfaces of the shaping fingers is also avoided.
  • the surface energy on the shaping finger compared with the hot sheathing is minimized by non-stick materials, and so surface wetting and an adhesive bond are avoided.
  • the shaping apparatus Since the shaping apparatus is located outside of the heating region in its rest position, heating of the shaping apparatus, in particular of the shaping fingers, is reduced as far as possible, such that, as a result, the surface energy and the adhesion tendency are likewise kept low.
  • the use of a heat-resistant material is appropriate, since the sheathing is in the still-hot state while the method is carried out.
  • the shaping apparatus cooperating with one side of a pallet can consist of two halves, wherein each half has at least one pivotable shaping finger in each case and optionally also at least one shaping finger, and preferably each half is constructed in a mirror-inverted manner and wherein preferably both halves are displaceable synchronously.
  • the pallet conveyor which can be for example a pull-over station conveyor or a shrink station conveyor, also has three movement tracks adapted to the rows of legs of the pallet.
  • a pull-over station conveyor is located upstream of a shrink machine, as seen in the transporting direction.
  • a sheathing configured preferably as a hood can first of all be pulled over.
  • a movement track can be for example a chain track, a belt track or the like.
  • One half of the shaping apparatus in this case creates a clearance in the left-hand leg clearance and the other half of the shaping apparatus creates a clearance in the right-hand leg clearance.
  • the sheathing region is “laid” around the two leg clearances and sets in the taut position on cooling. Consequently, the pallet is free both in the region of the two leg clearances and at the end in the region of the middle row of legs.
  • At least one shaping finger can be assigned a stop that limits the pivoting travel of this shaping finger, said stop extending parallel to the horizontal travel path and in a manner protruding in the opposite direction beyond the shaping finger(s) assigned to this shaping finger.
  • the stop thus projects into the contour of the pallet, i.e. into the leg clearance. If the stop comes into contact for example with the leg of the leg clearance during the pivoting of the shaping finger, the pivoting movement is stopped.
  • an angle compensation element preferably configured as a vertically oriented peg.
  • the shaping apparatus is also able to be oriented with regard to a pallet arranged in a non-optimal manner.
  • a fixing element that is displaceable in the direction of the pallet can be provided.
  • the invention also relates to a shrink machine comprising a hot-air frame which is movable vertically along a stack of items arranged on a pallet and provided with a sheathing that consists of a shrink film, and also at least one shaping apparatus according to one of the claims.
  • FIG. 1 shows a shrink station conveyor having a total of two shaping apparatuses according to the invention of a shrink machine
  • FIG. 2 shows a shaping apparatus in the flapped-in and non-raised state (rest position)
  • FIG. 3 shows the shaping apparatus according to FIG. 2 in the flapped-out and raised state
  • FIG. 4 shows the shaping apparatus in the rest position
  • FIG. 6 shows the pulling-away movement of the shaping apparatus
  • FIG. 7 shows the shaping of the sheathing region
  • FIG. 8 shows the pressure exertion operation
  • FIG. 9 shows the sheathing in the shaped state.
  • the shrink machine comprises, inter alia, a shrink station conveyor, which is configured as a chain conveyor in the exemplary embodiment illustrated.
  • the chain conveyor comprises five chain tracks 1 in the exemplary embodiment illustrated.
  • the first and the second chain track 1 and the fourth and the fifth chain track 1 are each arranged close together at a slight distance apart.
  • the distance between adjacent chain tracks 1 is adapted to the formats of the pallet 2 to be conveyed.
  • a pallet 2 which is positioned thereon and on the top of which a stack of items is arranged, can be moved in the conveying direction (arrows 3 ).
  • the two longitudinal edges of the pallet 2 are oriented parallel to the conveying direction 3
  • the two short end edges of the pallet 2 are oriented orthogonally to the conveying direction 3 .
  • the shrink machine illustrated has a pallet lifting device 4 having lifting rams 5 , a blower module 6 and a total of two shaping apparatuses 7 .
  • the hot air frame which is usually arranged centrally in the shrink machine.
  • the two ends of the shrink station conveyor are connected via suitable connection points to the further conveying technology or to other machine constituents, such as a hood pull-over station, for example.
  • each pallet 2 side that is oriented orthogonally to the conveying direction 3 is assigned a shaping apparatus 7 .
  • one shaping apparatus 7 acts on the pallet 2 side that is oriented orthogonally to the conveying direction 3 and the other shaping apparatus 7 acts on the opposite other pallet 2 side that is oriented orthogonally to the conveying direction 3 .
  • Each shaping apparatus 7 consists of two halves, wherein one half is arranged in the region between one outer chain track 1 and the middle chain track 1 and the other half is arranged in the region between the middle chain track 1 and the other outer chain track 1 .
  • the two halves of the shaping apparatus 7 acting on one pallet 2 side are constructed in a mirror-inverted manner with respect to one another.
  • FIGS. 2 and 3 show a shaping apparatus 7 in detail.
  • Each shaping apparatus 7 has a guide 8 and a drive (not illustrated). In this way, each shaping apparatus 7 can be displaced towards the pallet 2 , and away again, from both sides as seen in the conveying direction 3 .
  • the guide 8 is arranged parallel to and beneath the middle chain track 1 .
  • the guide 8 is configured as a ball rail system. However, other configurations are also possible. It is also conceivable for each of the two shaping apparatuses 7 to be assigned a separate guide 8 .
  • the shaping apparatus 7 interacting with the pallet 2 side that is oriented orthogonally to the conveying direction 3 can then be displaced separately from the shaping apparatus 7 cooperating with the other pallet 2 side that is oriented orthogonally to the conveying direction 3 .
  • a vertical guide having a drive is provided, which comprises a cylinder 10 in the exemplary embodiment illustrated.
  • the vertical guide is configured as a ball rail system in the exemplary embodiment illustrated and is arranged next to the cylinder 10 .
  • each shaping apparatus 7 has an angle compensation element 11 .
  • the angle compensation element 11 is a vertically oriented peg on which the shaping apparatus 7 is arranged in a rotatably mounted manner.
  • the shaping apparatus 7 is kept in the position which corresponds to an optimal orientation of the pallet 2 on the chain tracks 1 .
  • the side edges of the pallet 2 are oriented orthogonally or parallel to the conveying tracks 1 .
  • the pallet 2 can be set down on the chain tracks 1 or raised by means of the lifting rams 5 . If the pallet 2 has not been set down optimally on the chain tracks 1 , the orientation of the pallet 2 is generally maintained when it is raised by way of the lifting rams 5 . Any angular error would thus continue to exist.
  • the shaping apparatus 7 When the shaping apparatus 7 is moved up to the pallet 2 , the shaping apparatus 7 is oriented automatically with respect to the pallet 2 . If the pallet 2 is not oriented optimally with respect to the chain tracks 1 , when contact is made with the pallet 2 , the shaping apparatus 7 is rotated by the pallet 2 , counter to the force of the spring, into the position which corresponds to the orientation of the pallet 2 .
  • each shaping apparatus 7 has been lowered beneath the conveying level within the shrink station conveyor.
  • each half of a shaping apparatus 7 comprises three upwardly directed shaping fingers 12 and 12 . 1 , the respective ends of which are configured as a tab and/or as a hook 24 , 24 . 1 .
  • a sheathing 17 can be grasped, pulled out, shaped and additionally pressed against the side of the pallet 2 in particular while the still-hot sheathing 17 sets by cooling, as is illustrated in FIG. 8 .
  • the contact regions of the shaping fingers 12 and 12 . 1 can be coated or provided with a non-stick and/or heat-resistant material 27 at least in the regions that come into contact with the sheathing 17 and/or with the sheathing region 18 .
  • Each half of the shaping apparatus 7 has two shaping fingers 12 which are displaceable in the horizontal direction in order to pull the sheathing region 18 away from the pallet 2 .
  • the third shaping finger of each half namely the shaping finger 12 . 1 , is mounted in a pivotable manner, as can be seen for example in FIGS. 3 and 9 .
  • the shaping finger 12 . 1 is assigned a drive 13 such that the shaping finger 12 . 1 is displaceable about the pivot pin 14 .
  • the shaping finger 12 . 1 is configured in such a way with respect to the two shaping fingers 12 which are assigned to this shaping finger 12 . 1 that this shaping finger 12 . 1 is not in contact with the sheathing region 18 during the pulling away operation.
  • Each movable shaping finger 12 . 1 is assigned a stop 15 which allows automatic fitting into the corners of the leg clearances 16 of the pallet 2 , regardless of the format of the pallet 2 .
  • the stop 15 projects into the contour of the pallet 2 , i.e. into the leg clearance 16 . If the stop 15 comes into contact with the leg of the leg clearance 16 during the pivoting of the shaping finger 12 . 1 , the pivoting movement is stopped.
  • FIGS. 4 to 9 illustrate a pallet 2 which has three rows consisting of in each case three legs 19 , 20 , 21 of block-like design, wherein the three legs 19 and 20 and 21 in a row are connected together on the underside by a bottom board 22 .
  • the sheathing 17 engages in this respect around the underside of the two outermost bottom boards 22 and the two outermost ends of the bottom board 22 connecting the legs 20 .
  • the pallet 2 On the top side, the pallet 2 has a standing surface 23 which consists of five top boards. It is also possible for transverse boards to be arranged between the legs 19 , 20 , 21 and the standing surface 23 .
  • the above-described components of the pallet 2 are labelled only in FIG. 4 .
  • the two legs are the outermost legs 19 , 21 .
  • the sheathing region 18 to be displaced upwards extends over the middle leg 20 such that both the leg clearance 16 between the two legs 19 , 20 and the leg clearance 16 between the two legs 20 , 21 is completely free of the sheathing region 18 after the method according to the invention has been carried out.
  • each shaping apparatus 7 consists of two halves, wherein each half is assigned to a leg clearance 16 and has the above-described two shaping fingers 12 and the shaping finger 12 . 1 to create a clearance.
  • a view of the short side of the pallet 2 is illustrated in the respective left-hand half of FIGS. 4 to 9 and a view of the long side of the pallet 2 (parallel to the conveying direction 3 ) is illustrated in the right-hand half of FIGS. 4 to 9 .
  • a pallet 2 is conveyed into the shrink machine and stopped. Subsequently, the pallet 2 is raised for undershrinking by means of the pallet lifting device 4 , which has lifting rams 5 that are displaceable in a manner corresponding to the size of the pallet 2 . After raising, the undershrinking of the lower periphery of the sheathing 17 is carried out. In the meantime, the two shaping apparatuses 7 are located outside the heating region in their rest position, as is illustrated in FIG. 4 .
  • the pallet 2 After completion of undershrinking, the pallet 2 is lowered to a lower height, but not set down. If desired, the undershrink created in the raised state can additionally be secured at the outer periphery of the pallet 2 by means of pressure rams 26 .
  • the pressure rams 26 By means of the pressure rams 26 , which are arranged between the first and the second chain track 1 and the fourth and the fifth chain track 1 , respectively, the lower periphery of the sheathing 17 and thus the undershrink is pressed against the underside of the pallet 2 in the region of the sides oriented parallel to the conveying direction 3 .
  • a mechanical coupling can be provided for example between the pressure rams 26 and the movement of the pallet lifting device 4 .
  • the pressure rams 26 can also be embodied in a power-driven manner.
  • the shaping apparatuses 2 are moved up to the pallet 2 from both sides. This takes place on the one hand by a horizontal movement (arrow 3 ). Furthermore, the shaping apparatuses 7 are raised in the direction of the arrow 9 . This is illustrated in FIG. 5 . During the horizontal displacement, the shaping fingers 12 , 12 . 1 are still located beneath the plane of the bottom boards 22 of the pallet 2 , such that the shaping fingers 12 , 12 . 1 can be moved within the contour of the sheathing 17 .
  • the shrinking process can in this case be continued by moving the heating frame vertically upwards.
  • the shaping apparatuses 7 moved up to the pallet 2 are therefore not located in the direct heating zone of the hot-air frame in their position moved up to the pallet 2 .
  • the shaping fingers 12 , 12 . 1 have already been raised to such an extent that the hooks 24 , 24 . 1 are located above the lower periphery of the sheathing 17 and thus within the sheathing 17 , such that the hooks 24 , 24 . 1 of the shaping fingers 12 , 12 . 1 engage behind the sheathing 17 that is still hot and soft from undershrinking.
  • the shaping apparatus 7 and thus the shaping fingers 12 , 12 . 1 are subsequently moved away from the pallet 2 by the drive assigned to the guide 8 , such that, as a result, the sheathing region 18 grasped by the hooks 24 , 24 . 1 is pulled away from the pallet 2 in the still-hot state. This is illustrated in FIG. 6 .
  • the sheathing region 18 is displaced upwards in the still-hot state. This is illustrated in FIG. 7 .
  • the shaping fingers 12 . 1 having the hooks 24 . 1 are pivoted upwards and outwards in a pivoting movement about their pivot pins 14 .
  • the sheathing 17 is pulled around the respective lower inner edge of the two legs 19 , 21 , i.e. around the right-hand lower inner edge of the leg 19 and around the left-hand lower inner edge of the leg 21 , in the exemplary embodiment illustrated.
  • each shaping finger 24 . 1 is assigned a stop 15 . Since the stop 15 projects into the contour of the pallet 2 , i.e. into the leg clearance 16 , at least with its front end, the stop 15 comes into contact with the leg of the leg clearance 16 while the shaping finger 12 . 1 is being pivoted, such that the pivoting movement is stopped upon contact.
  • the shaping fingers 12 , 12 . 1 having the respectively associated tab 24 , 24 . 1 are in this case located outside the contour of the pallet 2 , i.e. at a distance from the outer side of the leg 19 , 20 , 21 , such that the deformed sheathing region 18 is “laid” from the outside around the leg clearance 16 in question and, in the exemplary embodiment illustrated in FIGS. 4 to 9 , around the two leg clearances 16 .
  • each shaping apparatus 7 is displaced horizontally again in the direction of the pallet 2 side oriented orthogonally to the conveying direction 3 of the pallet 2 . Since the two shaping fingers 12 .
  • each hook 24 . 1 that faces the pallet 2 is, inter alia, preferably coated with the non-stick and/or heat-resistant material 27 , as described above with respect to FIGS. 5 and 6 .
  • the not-yet cooled double-ply sheathing 17 is pressed against the standing surface 23 or the outer side of the leg 19 , 20 , 21 of the pallet 2 , as is illustrated in FIG. 8 .
  • the stretched sheathing region 18 and the adjoining sheathing 17 are displaced closer to the pallet 2 again and are connected on cooling to the sheathing 17 laid around the leg 19 , 20 , 21 , before said sheathing 17 cures, such that additional stabilization is achieved as a result by the sheathing region 18 connected to the adjoining sheathing 17 and/or the pallet 2 .
  • the angle compensation element 11 acts during this pressure exertion operation.
  • the sheathing 17 can be additionally fixed on the two sides to be shaped, which, in the exemplary embodiment illustrated, are the short end sides of the pallet 2 , by a fixing element 25 that is displaceable in the direction of the pallet 2 and is configured in the form of a pin, while the sheathing region 18 is being pulled away outwards and/or while the sheathing region 18 is being displaced upwards.
  • the fixing element 25 By means of the fixing element 25 , the sheathing 17 is pressed against the pallet 2 . As a result of this end-side fixing, undesired half-moon formation is avoided.
  • the middle chain track 1 consists of two spaced-apart chains that extend in parallel.
  • the fixing element 25 is located between the two chains of the middle chain track 1 .
  • the fixing element 25 acts approximately at the level of the standing surface 23 or a little lower, in the middle of the pallet 2 .
  • the fixing element 25 is displaced by a pivoting movement from its rest position illustrated in FIG. 1 , in which it does not project out of the plane of the chain conveyor, into its fixing position.
  • the pivot pin and the associated drive of the fixing element 25 can be constituent parts of the chain conveyor. However, it is also quite possible for the pivot pin and the associated drive of the fixing element 25 to be constituent parts of the shaping apparatus 7 .
  • the fixing element 25 can be located laterally at a short distance from the middle chain track 1 . It does not then act exactly on the middle of the pallet 2 , if the pivoting plane of the fixing element 25 is parallel to the axis of the chain track 1 and the conveying direction 3 . However, if the pivoting plane of the fixing element 25 is not parallel to the axis of the chain track 1 and the conveying direction 3 , contact is also possible in the middle of the pallet 2 in this case. Regardless of the orientation of the pivoting plane of the fixing element 25 , the fixing element 25 acts on the pallet 2 approximately at the level of the standing surface 23 or a little lower.
  • a respective fixing element 25 may be located on each side of the middle chain track 1 , such that the sheathing 17 is pressed against the pallet 2 at two locations in this way.
  • FIG. 9 After completion of the shrinking process, the forming fingers 12 . 1 are pivoted back downwards again. This situation is illustrated in FIG. 9 . As can be gathered from FIG. 9 , the shaping apparatuses 7 have already been lowered again and moved outwards out of the heating region of the shrink machine in this illustration. If pressure rams 26 have been used, these are released when the pallet 2 is set down and the pallet 2 can subsequently be conveyed away.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)
  • Basic Packing Technique (AREA)
  • Labeling Devices (AREA)
US15/273,364 2015-09-23 2016-09-22 Method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, and shaping apparatus for carrying out the method Abandoned US20170081063A1 (en)

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US16/921,364 US20200331649A1 (en) 2015-09-23 2020-07-06 Method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, and shaping apparatus for carrying out the method

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EP15186529.2 2015-09-23
EP15186529.2A EP3147226B1 (de) 2015-09-23 2015-09-23 Verfahren zur schaffung zumindest eines freiraums in einer aus schrumpffolie bestehenden ummantelung, welche einen auf einer palette angeordneten gutstapel sichert, sowie formvorrichtung zur durchführung des verfahrens

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US16/921,364 Abandoned US20200331649A1 (en) 2015-09-23 2020-07-06 Method for creating at least one clearance in a sheathing that consists of shrink film and secures a stack of items arranged on a pallet, and shaping apparatus for carrying out the method

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IT201700101010A1 (it) * 2017-09-08 2019-03-08 Ocme Srl Dispositivo e procedimento di applicazione di maniglie di presa su pellicole di imballaggio nonche’ macchina fardellatrice munita di tale dispositivo e atta ad attuare tale procedimento.
DE202021103827U1 (de) * 2021-07-16 2022-01-12 Msk - Verpackungs-Systeme Gmbh Formvorrichtung zur Durchführung eines Verfahren zur Schaffung zumindest eines Freibereichs in einer aus Schrumpffolie bestehenden, vorzugsweise als Schrumpfhaube ausgebildeten, Ummantelung

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US4866916A (en) * 1987-06-06 1989-09-19 Msk-Verpackungs-Systeme Gesellschaft Mit Beschrankter Haftung Apparatus for shrink-wrapping palletted goods
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US10974857B2 (en) 2017-03-28 2021-04-13 MSK—Verpackungs-Systeme GmbH Method for creating at least one opening in sheath made of stretch film that retains goods stack arranged on pallet, and shaping apparatus for carrying out the method

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EP3147226B1 (de) 2018-07-04
US20200331649A1 (en) 2020-10-22
EP3147226A1 (de) 2017-03-29
CN106882408B (zh) 2019-03-05
DK3147226T3 (da) 2018-10-15
CN106882408A (zh) 2017-06-23

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