EP3333092B1 - Wrapping machine system - Google Patents

Wrapping machine system Download PDF

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Publication number
EP3333092B1
EP3333092B1 EP17205107.0A EP17205107A EP3333092B1 EP 3333092 B1 EP3333092 B1 EP 3333092B1 EP 17205107 A EP17205107 A EP 17205107A EP 3333092 B1 EP3333092 B1 EP 3333092B1
Authority
EP
European Patent Office
Prior art keywords
sheet
heating
temperature
hot
sheets
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.)
Not-in-force
Application number
EP17205107.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3333092A1 (en
Inventor
Debora GAMBETTI
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.)
Baumer SRL
Original Assignee
Baumer SRL
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 Baumer SRL filed Critical Baumer SRL
Publication of EP3333092A1 publication Critical patent/EP3333092A1/en
Application granted granted Critical
Publication of EP3333092B1 publication Critical patent/EP3333092B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
    • B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents

Definitions

  • the present invention relates to a wrapping machine system for wrapping objects by means of hot sheets of heat-shrinkable material.
  • EP 1013551 discloses a system according to preamble of claim 1.
  • Systems for wrapping objects by sheets of heat shrinkable material are known wherein, summarily, by said systrems, each individual object is wrapped one after the other by means of a respective sheet of heat-shrinkable material, wherein said sheet has been previously heated to a temperature higher than the softening temperature of the heat-shrinkable material.
  • a first drawback is due to the fact that they do not allow to operate at high operating speeds and, therefore, they do not allow to obtain a high wrapping productivity.
  • a second drawback is due to the fact that said systems do not allow to get an uniform and/or rapid heating of the sheet.
  • a third drawback is due to the fact that they do not allow to get a good synchronization between the various operations to be performed and a good execution of the same operations.
  • a fourth drawback is due to the fact that such system do not allow to carry out a quick format change in relation to the size of the sheet of material and/or in relation to the size of the items to be packaged and/or in relation to the type of shrink material of which the sheet is composed.
  • a fifth drawback is due to the fact that these system do not allow to get an easy execution of the cutting of the sheets.
  • a sixth disadvantage is due to the fact that they do not allow to perform operations in relation to the temperature of the sheets during the winding phase.
  • the purpose of the present invention is therefore to solve the aforementioned drawbacks, and to indicate how to heat-treat various wrapping means.
  • the invention solves the problem of creating a system for a wrapping machine of the "sleeve" type to wrap hot sheets of packaging thermoshrinking material around objects to be packaged, comprising the features of claim 1. Further features of the invention are disclosed in the dependent claims.
  • figure 1 shows a preferred embodiment of the system object of the present invention.
  • FIG. 1 it illustrates an embodiment of the system object of the present invention and, more particularly, a "sleeve" type packing machine system, wherein said system is designed to wrap hot sheets of shrinkable packaging material around objects 10a, 10b, 10c, etc. to be packaged, wherein said objects 10a, 10b, 10c, etc. move preferably with continuous motion from upstream to downstream as indicated by arrow F1, wherein said system substantially comprises:
  • the first objects conveying means are able to move objects 10a, 10b, 10c, etc. longitudinally in a spaced succession, from upstream to downstream, with respect to arrow F1.
  • the second objects conveying means 200 are positioned downstream and at a short longitudinal distance with respect to said first objects conveying means 100, in order to form a first opening A1 between said first 100 and said second 200 object conveying means.
  • Said second objects conveying means 200 are able to receive the objects 10a, 10b, 10c, etc., arriving from said first objects conveying means 100, as well as able to move said objects 10a, 10b, 10c, etc., along a wrapping surface which has an inlet end and an outlet end.
  • the third objects conveying means 300 are positioned downstream and at a short longitudinal distance from said second object conveying means 200, in order to form a second opening A2 between said second 200 and said third 300 object conveying means.
  • Said third objects conveying means 300 are able to receive the units 10a-Sa comprising an object 10a and a hot sheet Sa arriving from said second objects conveying means 200.
  • Sheets wrapping means 400 are positioned in the vicinity of said second objects conveying means 200, and they comprise at least one suspended wrapping bar 401 oriented transversely with respect to the direction of advancement of the objects 10a, 10b, 10c, etc., in which said bar 401 is brought to move along an orbital path that passes through said first A1 and said second A2 opening, wherein said bar 401 transports the sheets Sb of wrapping material.
  • the control means 500 are able to control, operate and synchronize the various operative means, 100, 200, 300, 400, 500, 600, 700, 800 e 900, as better described hereinafter, and they may comprise a control unit programmable (CPU) or other similar devices, suitable for controlling and managing operating means, such as, for example, actuators, M.200 (which preferably drive the means 100, 200 and 300 by mechanical connections), M.400, M.900, M.800, M.700 able to operate individually and in an independent manner the above mentioned operating means 100, 200, 300, 400, 500, 600, 700, 800, 900.
  • actuators M.200 (which preferably drive the means 100, 200 and 300 by mechanical connections)
  • M.400, M.900, M.800, M.700 able to operate individually and in an independent manner the above mentioned operating means 100, 200, 300, 400, 500, 600, 700, 800, 900.
  • the tape heating-feeding means 600 are positioned upstream with respect to the feeder cutting means 700.
  • Said tape heating-feeding means 600 are able to heat the front portion (downstream portion) 20a of a tape 20 of heat-shrinkable material to a first temperature, as well as able to feed said heated and hot downstream portion 20a to the cutting-feeding means 700, as for example hot rollers which heat up the belt 600 by contact.
  • the cutting-feeding means 700 are positioned upstream with respect to the first sheets heating-feeding means 800.
  • Said cutting-feeding means 700 are able to cut said heated and hot front portion (downstream portion) 20a of heat-shrinkable material, in order to obtain a sheet Sd of heated and hot material, as well as able to feed said heated tape 20a and/or said last heated and hot sheet Sd towards the first sheets heating-feeding means 800.
  • the first sheets heating-feeding means 800 are positioned upstream with respect to the second sheets heating-feeding means 900.
  • Said first heating-feeding means 800 are able to heat said last heated and hot sheet Sd to a second temperature which is greater than the first temperature, in order to obtain a sheet Sc more heated, and they are also able to feed said last sheet Sc to said second heating-feeding means.
  • the second sheets heating-feeding means 900 are positioned upstream with respect to the sheets wrapping means 400.
  • Said second sheets heating-feeding means 900 are able to heat said last heated and hot sheet Sc to a third temperature which is greater than the second temperature, in order to obtain a more heated sheet Sb, and they are also able to feed said last sheet Sb to the wrapping means 400.
  • Said wrapping means 400 are able to receive the hot sheet Sb fed by the second sheets heating-feeding means 900 and to wrap said last heated and hot sheet Sb around the object 10b to be wrapped.
  • a packaging method is performed in which said method comprises the following steps:
  • the second temperature is lower or slightly lower than the softening and/or shrinking temperature of the heat-shrinkable material but, for some types of materials and/or with particular thicknesses and/or for other reasons, said second temperature may also be greater than the softening and/or shrinking temperature of the heat-shrinkable material.
  • the third temperature is equal to or greater than the softening and/or shrinking temperature, or it may be even higher, such as for example equal to or greater than the welding temperature of the heat-shrinkable material.
  • first sheets heating-feeding means 800 they preferably comprise a first conveyor 801 and a second conveyor 803.
  • the first conveyor 801 is positioned below and to the right with respect to Fig. 1 , and it comprises a hot transport belt 802 which upperly configures a first operating branch, which is able to heat and to transport the front portion (downstream portion) of the tape or the sheets Sd of hot tape which are fed by the cutting feeding means 700.
  • the second conveyor 803 is positioned above and to the left with reference to FIG. 1 and it comprises a hot conveyor belt 804 which upperly configures a second operative branch, which is able to heat and to transport the front portion (downstream portion) of the tape or the sheets Sd of hot tape which are fed by the cutting feeding means 700.
  • downstream portion 20a of the hot tape or the hot sheets Sd is positioned between said first and said second transport branch, wherein said two branches are mutually counterfeited and approached between them, in order to perform the heating and feeding (transport and pull) execution of the hot tape 20a and/or of the sheet Sd towards downstream.
  • the hot conveyor belts 802 and 804 are heated by a respective heated assembly 805 and 806 positioned within the respective conveyor 801 and 803.
  • the two conveyors 801 and 803 can be moved, spaced out or approached from each other, in order to decrease or increase the space between the two operating branches, so as to be able to adjust the space in relation to the thickness of the sheet and/or to allow a machine stop and/or for other reasons.
  • the second sheets heating-feeding means 900 comprise a third conveyor 901 having a heat transport belt 902, wherein said third conveyor 901 configures a heating and transport operating branch for the hot sheet Sc of heatshrink material, as for example a conveyor similar to conveyors 801 and 803 previously cited.
  • second sheets heating-feeding means 900 may also further comprise a heater 910, which is spaced and counterfeited with respect to said heating and transport operating branch of said third conveyor 901.
  • Said further heater 910 is designed to heat the sheet Sc when they are lying on the heating and conveying branch of said third conveyor 901, for example and preferably by means of a device having nozzles 911 able to create hot air blows 912 against said operating branch for heating and conveying the third conveyor 901 in order, for example, to heat the sheet Sc and to press said sheet Sc against the transport operating branch of the conveyor 901 improving the transport of the sheet Sc.
  • Said hot air puffs 912 are preferably operated in phase relation with respect to the operating phases relating to the packaging and, for example, can be operated only when the sheet Sc is already present above the operating branch of the conveyor 901, and they may also be deactivated on command to better perform the operations of wrapping and of receiving of the sheet.
  • Said further heater 910 may comprise any device designed to heat the sheet Sc by conduction and/or convection and/or radiation, without departing from the inventive concepts protected by the present invention.
  • said heater 910 can be moved, spaced-out or approached in a distanced/approachable manner with respect to the heating and transport operating branch of the third conveyor 901, in order to space-out or approach said heating device 910 with respect to the heating and conveying operating branch of the third conveyor 901, in order to adjust the distance in relation to the size and/or type of the packaging material, or to space-out or approach said heating device 910 during the execution of the packaging operations, for example, to manage and optimize the execution of the picking operations and of wrapping the sheet.
  • said first temperature is greater than the ambient temperature and, again preferably, lower or slightly lower than a temperature which would not allow to cut said tape 20, as for example a temperature between a minimum of 60°C and a maximum of 110°C and, in any case, a first temperature that allows to easily cut the heated tape without complications.
  • said first temperature will be selected in relation to the type of packaging material, in relation to the thickness of the material, as well as in relation to the cutting means which will be used.
  • the tape heating-feeding means 600 comprise a path for the tape having a snake like shape.
  • the sheets wrapping means 400 comprise separating means 402 which are able to prevent and/or limit the contact between the front portion Sb1 and the rear portion Sb2 of the heated and hot sheet Sb during the steps of wrapping the hot sheet Sb around the product 10b.
  • said separator means 402 comprise a curtain-shaped element 402 associated with the wrapping bar 401 and, moreover, if necessary, said separator means 402 may be hot in order to heat the sheet Sb2 during its transport and wrapping.
  • the tape cutting steps used to obtain the sheet are improved, as the cutting takes place with a tape having a temperature slightly lower than the softening and/or shrinking temperature, and therefore a temperature in which said tape is still rigid and it is not sticky/soggy.
  • the heating process to obtain the hot sheet is improved, as said heating takes place by means of two or more distinct and separate steps of heating (as first step the downstream portion of the tape is heated and then the cutted hot sheet is heated by one or more steps), allowing to modulate the heating by means of a plurality of separate individual heat steps until the desired temperature is reached.
  • the heating times of the sheet are improved and reduced, as the sheet obtained after cutting is not at room temperature but at a higher temperature, preferably at a temperature slightly lower than the softening and/or shrinking temperature.
  • the lengths of the path or of the paths for heating the sheet are improved and reduced, as the sheet obtained after cutting is not at the room temperature but at a higher temperature.
  • the wrapping steps are improved, as during said steps the sheet can be heated, for example in order to maintain and/or increase the temperature for the same sheet.
  • the characteristics relating to the change of format in relation to the size of the sheet and/or in relation to the dimensions of the objects to be wrapped are improved, as it is possible to operate on a plurality of operating steps (and not on a single phase) in order to obtain the segment heated to the desired temperature.
  • the characteristics relating to the change in setting in relation to the type and/or thickness of the wrapping film material are improved, as it is possible to operate on a plurality of operating steps (and not on a single operating phase) in order to obtain the sheet heated at the temperature desired.
  • the wrapping operations are improved, as during said operations the operating means can be operated independently of each other, in order to optimize the wrapping operations.
  • the wrapping operations are improved, as during said operations the sheet in course of wrapping can be heated, for example in order to maintain and/or increase the temperature for the same sheet.
  • the characteristics relating to the size change in relation to the size of the sheet and/or in relation to the dimensions of the objects to be wrapped are improved, as it is possible to operate on a plurality of operating means in order to obtain the sheet heated to the desired temperature.
  • the characteristics relating to the change in setting in relation to the type and/or thickness of the packaging film material are improved, as it is possible to operate on a plurality of operating means in order to obtain the sheet heated to the desired temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP17205107.0A 2016-12-12 2017-12-04 Wrapping machine system Not-in-force EP3333092B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000124800A IT201600124800A1 (it) 2016-12-12 2016-12-12 Sistema di macchina imballatrice

Publications (2)

Publication Number Publication Date
EP3333092A1 EP3333092A1 (en) 2018-06-13
EP3333092B1 true EP3333092B1 (en) 2019-10-23

Family

ID=58455494

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17205107.0A Not-in-force EP3333092B1 (en) 2016-12-12 2017-12-04 Wrapping machine system

Country Status (2)

Country Link
EP (1) EP3333092B1 (it)
IT (1) IT201600124800A1 (it)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1304441B1 (it) * 1998-12-22 2001-03-19 Baumer Srl Metodo per imballare oggetti mediante foglia di materialetermoretraibile e relativa macchina imballatrice.
EP2354014A1 (en) * 2010-02-02 2011-08-10 Tetra Laval Holdings & Finance S.A. Unit and method for manufacturing at least one multi-pack comprising a plurality of packages wrapped in a sheet of heat-shrinkable material
DE102011013117A1 (de) * 2011-03-04 2012-09-06 Krones Aktiengesellschaft Verpackungsmodul für mit Verpackungs- und/oder unter Erwärmung schrumpfbarer Schrumpffolie zu umhüllende Gebinde oder Artikelgruppen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
IT201600124800A1 (it) 2018-06-12
EP3333092A1 (en) 2018-06-13

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