EP0631935A1 - Dispositif pour rétrécir une feuille d'emballage sur une unité d'emballage - Google Patents

Dispositif pour rétrécir une feuille d'emballage sur une unité d'emballage Download PDF

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Publication number
EP0631935A1
EP0631935A1 EP94107878A EP94107878A EP0631935A1 EP 0631935 A1 EP0631935 A1 EP 0631935A1 EP 94107878 A EP94107878 A EP 94107878A EP 94107878 A EP94107878 A EP 94107878A EP 0631935 A1 EP0631935 A1 EP 0631935A1
Authority
EP
European Patent Office
Prior art keywords
frame
burner
burners
packaged goods
shrinking
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.)
Withdrawn
Application number
EP94107878A
Other languages
German (de)
English (en)
Inventor
Hans Dentz
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.)
Dentz Verpackungsmaschinen GmbH
Original Assignee
Dentz Verpackungsmaschinen GmbH
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
Application filed by Dentz Verpackungsmaschinen GmbH filed Critical Dentz Verpackungsmaschinen GmbH
Publication of EP0631935A1 publication Critical patent/EP0631935A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B65B53/06—Shrinking wrappers, containers, or container covers during or after packaging by heat supplied by gases, e.g. hot-air jets
    • B65B53/066—Mobile frames, hoods, posts or the like

Definitions

  • the invention relates to a device for shrinking packaging films on packaging goods units, such as palletized goods stacks.
  • Devices of this type which have a frame comprising the packaged goods unit, on which burners are provided, which can be moved along a vertical guide (EP 133 462 A).
  • the pallet standing on a transport unit possibly after additional lifting for shrinking, is shrunk from below in that the frame moves upwards and the burners provided on the entire circumference of the frame generate a heat flow which is as uniform as possible and which shrinks the film without overheating them partially and burning them out.
  • a device has become known in which a burner is provided on a multi-articulated arm, similar to a robot arm, which rotates about a fulcrum that lies above the packaged goods unit.
  • a correspondingly complex control in the manner of a "copying movement" which follows the shape of the packaged goods unit, the distance of the burner from the packaged goods unit is there during the helical Circulation kept constant.
  • this device works with a constant or predetermined distance between the burner and the surface to be treated, it requires great effort in production, control and maintenance.
  • the object of the invention is to provide a shrinking device which avoids the disadvantages of the prior art.
  • a device is to be created which manages with simple burner systems with good heat distribution.
  • At least one burner can be moved substantially horizontally along guide means provided on the frame.
  • a frame which is adapted to the outer dimensions of the customary packaging goods units, for example a Euro pallet.
  • a burner is now preferably moved longitudinally per frame leg, so that it successively brushes a strip on one side of the packaged goods unit and thus shrinks.
  • the frame is then preferably moved vertically, preferably upwards, step by step, and the burners run back again to shrink the next strip. This continues in meandering movements until the entire height of the packaged goods unit is coated.
  • the burners should, if possible, be arranged and controlled in such a way that the burners of two adjacent guides, ie two adjacent legs of the frame, each move in opposite directions (towards or away from each other).
  • a particularly uniform shrinkage is achieved by initially shrinking the shrink film in the area of one of the vertical edges from both sides. In this area there is usually a little more foil and the shrinkage of the corner fixes it, so that good symmetry is achieved when the two burners move apart. With appropriate end stops, a more or less strong overlap of the hot gas flow from both burners in the corner can be achieved in order to achieve the perfect shrinking of this particularly critical edge area.
  • the burners then move vertically into the next shrinking plane by lifting the frame on the column vertically by one step.
  • the step size and / or the speed of the horizontal burner movement can be changeable in the upper area.
  • the speed along the corresponding legs should be chosen such that the burners each have approximately the same time for the passage of the legs of different lengths. This can be achieved by adjusting the drives or the gearbox.
  • the burners can be set to different degrees and / or several individual burners can be used.
  • a burner is to be understood here as any device that generates a stream of warm gas that shrinks a packaging film. These can be gas burners or electric burners, i.e. electric hot air guns.
  • gas burners or electric burners i.e. electric hot air guns.
  • the shape and size of the frame cross section is adapted to the basic cross section of the desired packaging unit. This is usually a rectangular cross section. However, it would also be possible to produce other cross sections, possibly even with curved sides, if objects of the same, but not rectangular, shape are frequently to be packed.
  • the frame can be interchangeably attached to the device for different basic cross sections. However, if packaging goods units with a different, for example considerably smaller, cross-section are only to be packed temporarily, this is also possible with a standard frame. For example, in the case of so-called half-pallets, ie pallets that are only half the length with the same width (e.g.
  • the device can be operated purely in terms of control technology so that, for example, at the beginning the burners only move three sides of the U and accordingly shrink the object from only three sides, while in a second step the pallet within the frame is pushed towards the other side of the frame, the burner of which has been extinguished until then, and the rest of the side is shrunk. Since the device usually also includes a transport system with which the pallets are guided through the device in the manner of a processing line, this is not a problem.
  • a device 11 for shrinking a packaging film 12 around a packaged goods unit 13 is provided within a packaging line 14, which may include devices for stacking objects 15 on a pallet 16 upstream, as well as a hood covering device in which a hood or a tube section of the packaging film is pulled from above over the packaged goods unit.
  • the pallet 16 for example a Euro pallet with a base area of 1200 x 800 mm, runs with its carriers 17 on conveying means 18, such as belts, chains, grippers or the like. These cross the base 19 of the device 11.
  • Lifting devices 20 are also provided in the base in order to be able to lift the pallet for shrinking.
  • a column section 21 projects vertically upward from the base 19. It consists of two parallel columns 22 (FIG. 2), which are connected to one another like a gate at the top.
  • a frame 24 is arranged vertically movable on the column by means of vertical guides 23. The frame is horizontal and has an inner opening 25, the shape of which is adapted to the cross section of the packaged goods unit 13, but leaves sufficient space around it.
  • a lifting system 28 is provided which is driven by a motor 27 and operates, for example, with a chain or a toothed belt.
  • the rectangular frame 24 has four frame legs 30 with a U-shaped cross section and guide means 31 arranged therein. These contain guide rails 32, which run along each frame leg 30 and a total of four burner slides 33, which can be displaced along these guides, for example by rollers. A burner 34 or possibly also a plurality of burners are arranged one above the other on each of these burner slides 32.
  • the burners are gas burners. They are about supply hoses, not shown, that extend along the Roll guides, connected to a gas supply, not shown, for example a gas bottle or a natural gas connection. Intermediate valves ensure controllability and shutdown. Automatic ignitions are provided.
  • a drive 35 is provided for the movement of the burners along the guides 32. It can be designed in any manner and is shown here as a toothed belt drive, which has two rotating toothed belts 36, 37 (shown in broken lines and dash-dotted lines), which run around corner deflection disks 38 in the frame. For illustration, they are shown in FIG. 2 next to one another or surrounding one another. In practice, they can expediently run one above the other.
  • Each of the toothed belts is connected to two burners, namely the frame legs located opposite one another.
  • the drive can take place via a gear 39 from a motor 40 to a corner deflection disk 38, which is then also a drive disk.
  • the packaged goods unit 13 is placed by the conveying means 18 in the center of the raised frame and this is moved into its lowermost position by means of the drive 28.
  • the packaging film 12 hangs over the unit as a hood, ie as a tube section welded at the top, the lower edge being in the region of the pallet 17. This section is first shrunk by igniting the burners 34 and shrinking a first lower strip around the pallet.
  • the pallet is lifted slightly by the lifting devices 20 so that the film is well below the underside of the pallet to lay.
  • a fan can be provided in the lower area.
  • the shrinking takes place in such a way that adjacent burners are moved in opposite directions to one another.
  • the end positions are adjustable by limit switches, not shown, so that the two burners overlap with their burner jet 42 more or less and direct it onto an edge 43 of the stack of packaged goods.
  • the burners are now along the guides 32, i.e. substantially horizontally, set in motion by turning on the motor 40. It drives the two belts 36, 37 in opposite directions via the transmission 39, so that the burners 34, each in diagonally opposite corners, move away from one another and away from these corners to the other corners.
  • the speed of movement is set up so that they reach these corners essentially simultaneously.
  • the greater speed of the burners on the longer sides of the frame leg, which is generated by appropriate arrangement of the gear 39, is compensated for by a correspondingly stronger burner setting, so that there is a uniform supply of heat.
  • the frame is increased by one step by gradually driving the lifting drive 28 driven, the height of which depends on the effective width of the strip shrunk in one pass.
  • the burners stay a little longer in the corner and immediately fix the edge in the area above by shrinking at the same time.
  • the workflow is then repeated in the opposite direction, ie the burners return to the position initially assumed.
  • the meandering process as shown in FIG. 1 with the dash-dotted line 44, then results on each side of the packaged goods unit.
  • the control means for performing these successive movements can be of a conventional type.
  • Electronic program control offers many options for running individual or predefined programs and taking the dimensions, the film shrinkage behavior and the sensitivity of the packaging goods into account by means of appropriate movement sequences.
  • An embodiment is preferred in which a burner is provided for each frame leg.
  • a burner is provided for each frame leg.
  • a burner for several sides of the frame, although the corner deflection is then not very easy, in particular because of the supply connections for the burner.
  • horizontal and lifting movements are carried out alternately one after the other.
  • the invention creates a device that is extremely adaptable due to its different possibilities. Despite the apparent additional effort due to the burner guidance in the frame, it has been found that the device is easier to manufacture and particularly uncomplicated to operate. For example, commercially available single burners can be used, which are orders of magnitude cheaper in terms of procurement and operation than long burner strips. The thermal load on the frame and the other parts of the device is also lower due to the short residence time of the burner at one point.
  • the burners could also be moved by a drive comprising all burners with correspondingly deflected belts, or also by individually driving each individual burner.
  • the column could also be pivoted between two plate storage spaces. The pallet could then be used with a normal floor conveyor, e.g. a forklift can be placed in one place while the shrinkage is running in the other place. Then, with the frame raised, the column is swung over to the other pallet, while the shrinked one is removed and replaced with a new one.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
EP94107878A 1993-06-05 1994-05-21 Dispositif pour rétrécir une feuille d'emballage sur une unité d'emballage Withdrawn EP0631935A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4318753 1993-06-05
DE19934318753 DE4318753A1 (de) 1993-06-05 1993-06-05 Vorrichtung zum Schrumpfen von Verpackungsfolien an Verpackungsgut-Einheiten

Publications (1)

Publication Number Publication Date
EP0631935A1 true EP0631935A1 (fr) 1995-01-04

Family

ID=6489729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94107878A Withdrawn EP0631935A1 (fr) 1993-06-05 1994-05-21 Dispositif pour rétrécir une feuille d'emballage sur une unité d'emballage

Country Status (2)

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EP (1) EP0631935A1 (fr)
DE (1) DE4318753A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1086893A2 (fr) * 1999-09-23 2001-03-28 Officina Meccanica Sestese S.p.A. Dispositif compact et reductible combiné pour emballer à l'aide d'un manchon plastique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20112408A1 (it) * 2011-12-28 2013-06-29 Marpak Oms Group S R L Apparecchiatura semplificata per l'imballaggio di carichi con pellicola termoretraibile
DE202016102826U1 (de) 2016-05-27 2016-06-08 Marpak-Oms Group S.R.L. Wärmeschrumpfeinrichtung zur Verpackung mit durch Wärme aufschrumpfbarer Folie, ausgestattet mit in Abschnitte unterteilten Brennern

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133462A2 (fr) * 1983-08-03 1985-02-27 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Procédé pour l'emballage de piles de marchandises palettisées et dispositif pour la mise en oeuvre du procédé

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801268A (en) * 1973-02-16 1974-04-02 D Amo Shrink-wrapping device
US3986611A (en) * 1973-07-06 1976-10-19 Union Carbide Corporation Cling film overwrap for palletized articles
DK147296C (da) * 1979-03-27 1985-01-14 Lachenmeier Kurt Aps Apparat til varmekrympning af en folie omkring en genstand
FR2565553B1 (fr) * 1984-06-08 1987-04-10 Pakem Machine d'emballage automatique par chauffage d'une gaine thermoretractable
DE3633680A1 (de) * 1986-10-03 1988-04-14 Dentz Verpackungsmaschinen Gmb Vorrichtung zum schrumpfen von verpackungsfolien
DE3932782A1 (de) * 1988-12-16 1990-06-21 Brega Verpackungsmaschinen Anw Vorrichtung zum verpacken von insbesondere palettiertem packgut

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133462A2 (fr) * 1983-08-03 1985-02-27 MSK-Verpackungs-Systeme Gesellschaft mit beschränkter Haftung Procédé pour l'emballage de piles de marchandises palettisées et dispositif pour la mise en oeuvre du procédé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1086893A2 (fr) * 1999-09-23 2001-03-28 Officina Meccanica Sestese S.p.A. Dispositif compact et reductible combiné pour emballer à l'aide d'un manchon plastique
EP1086893A3 (fr) * 1999-09-23 2002-06-19 Officina Meccanica Sestese S.p.A. Dispositif compact et reductible combiné pour emballer à l'aide d'un manchon plastique

Also Published As

Publication number Publication date
DE4318753A1 (de) 1994-12-08

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