EP3615429B1 - Method for making a package for groups of products and machine implementing the method - Google Patents

Method for making a package for groups of products and machine implementing the method Download PDF

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Publication number
EP3615429B1
EP3615429B1 EP18722738.4A EP18722738A EP3615429B1 EP 3615429 B1 EP3615429 B1 EP 3615429B1 EP 18722738 A EP18722738 A EP 18722738A EP 3615429 B1 EP3615429 B1 EP 3615429B1
Authority
EP
European Patent Office
Prior art keywords
products
groups
film
tubular channel
frame
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.)
Active
Application number
EP18722738.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3615429A1 (en
Inventor
Michele RASI
Nicola Giuliani
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.)
TMC SpA
Original Assignee
TMC SpA
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Publication date
Application filed by TMC SpA filed Critical TMC SpA
Publication of EP3615429A1 publication Critical patent/EP3615429A1/en
Application granted granted Critical
Publication of EP3615429B1 publication Critical patent/EP3615429B1/en
Active 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
    • 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
    • B65B9/20—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 webs being formed into tubes in situ around the filling nozzles
    • B65B9/213—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 webs being formed into tubes in situ around the filling nozzles the web having intermittent motion
    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/145—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging folded 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/14—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form
    • B65B25/146—Packaging paper or like sheets, envelopes, or newspapers, in flat, folded, or rolled form packaging rolled-up 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • 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
    • B65B63/00—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged
    • B65B63/02—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles
    • B65B63/026—Auxiliary devices, not otherwise provided for, for operating on articles or materials to be packaged for compressing or compacting articles or materials prior to wrapping or insertion in containers or receptacles for compressing by feeding articles through a narrowing space
    • 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
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/16—Packaging contents into primary and secondary packaging
    • B65B2220/20—Packaging contents into primary and secondary packaging the primary packaging being bags, the secondary packaging being further bags, the primary bags being either finished or formed concurrently with the secondary bags

Definitions

  • This invention relates to a method for making a package for groups of products for sanitary use and relative machine implementing the method, in particular, but without restricting the scope of the invention, rolls of "tissue” products such as, for example, rolls of paper for sanitary and/or household use or unwoven products such as nappies.
  • bagging machines which define, usually, an end station of machines for making the above-mentioned groups of products, bag the groups of products in tubular wrappers defined automatically by the bagging machine on the products to be wrapped.
  • the machine forms the wrapper from a flat strip of film of wrapping material (fed from a reel located below a plane of movement of the groups of products) and which, by means of special folding elements (called folding ties), is progressively folded back on itself in such a way as to generate a tubular shape, supported from the inside of the wrapper being formed by suitable supporting elements or walls (so as to define a "tunnel" with a quadrangular cross section), and having longitudinal flaps positioned next to and superposed on each other along the upper surface of the tunnel.
  • folding ties special folding elements
  • first sealing elements located at the front of the wrapper and the folding elements, oriented transversely to the tubular shape, which then allow the wrapper to be sealed, transversally, in such a way as to form, in sequence, a closed front end and rear end.
  • the process for forming the wrapping on the groups of products comprises the following steps:
  • a first drawback is due to the fact that the structure of the frame defining the channel for the groups of products determines a separation between wrapping film (wound around the frame) and the products and, consequently, the package is often obtained with slack or "loose" side walls with reduced rigidity of the pack and greater difficulty in the subsequent storage.
  • Another drawback is due to the fact that actual feeding of the film is accomplished through the pushing of the group of products on the sealing head and, consequently, to prevent breakage of the bottom/top of the bag it is necessary to reduce the machine cycle time to guarantee a perfect sealing of the flaps which form the bottom/top.
  • One of these relates to the possibility of modifying, that is to say, reducing, the overall size of the group of products.
  • the aim of this invention is to provide a method and a machine for making a package for groups of products for sanitary use which overcomes the above-mentioned disadvantages of the prior art.
  • the aim of this invention is to provide a method and a machine for making a package of groups of products for sanitary use which are able to modify, during the wrapping cycle step, the overall size, by reducing, the group of products.
  • a further aim of this invention is to provide a method and a machine for making a package for groups of products for sanitary use with high operational flexibility without modifying the basic structure of the machine.
  • the method and the machine according to the invention are used for making a package for groups of products for sanitary use, such as, but without restricting the scope of the invention, rolls of "tissue” products such as, for example, rolls of paper for sanitary and/or household use or unwoven products such as nappies.
  • the machine according to the invention (and the relative method) is a bagging machine which is used for wrapping a certain number of groups of products already packaged using plastic film or for bagging of groups of products formed by batches of loose products.
  • the method for making a package 1 of groups 2 of products for sanitary use comprises at least the following steps:
  • the step of modifying the size of the tubular channel 8 is given by the reduction in the width L of the channel 8.
  • the step of modifying the size of the tubular channel 8 is given by the reduction in the width L of the channel 8 and occurs with the groups 2 of products completely housed in the tubular channel 8 and feeding along the tubular channel 8.
  • the step of reducing the width L of the channel 8 may be of the dynamic type (movement of side walls 7 of the channel 8 simultaneously with the sliding movement of the groups 2 of products): thanks to these type of steps, the machine cycle times remain substantially unaltered.
  • the step of modifying the size of the tubular channel 8 is again given by the reduction in the width L and occurs with the groups 2 of products completely housed in the tubular channel 8 and stationary inside the tubular channel 8, whilst the side walls 7 move.
  • the step of reducing the width L of the channel 8 may be of the static type (movement of the walls 6 of the channel 8 with groups 2 of products provisionally stationary): this type of choice might be useful if it is necessary to wait a few seconds to allow a correct adhesion in the joining of the tail flaps of the package previously obtained.
  • the step of modifying the width of the tubular channel 8 occurs by a movement step, which is translational and towards each other, of at least two side walls 7 of the frame 4 forming the tubular channel 8.
  • the step of modifying the width L of the tubular channel 8 also occurs by a movement step (which is translational and towards each other) of the folding elements 5 in such a way as to adapt also the extension of the film 3 around the frame 4 to the different perimeter dimension reached by the tubular channel 8.
  • This invention also provides a machine, labelled 100 in its entirety, for making a package 1 of groups 2 of products for sanitary use.
  • the machine 100 comprises a station 13 for feeding a continuous wrapping film 3 (for example a roll of film).
  • the machine 100 also comprises a frame 4 for forming a tubular length of the continuous film 3.
  • the frame 4 has folding elements 5 and a plurality of walls 6, 7 forming a tubular channel 8 for the passage of the groups 2 of products and on which the continuous film 3 is wound.
  • the tubular channel 8 has a width L and a height H.
  • the machine 100 also comprises a pushing unit 10 for moving a predetermined number of groups 2 of products inside the tubular channel 8 in a feed direction A.
  • the machine 100 has first transversal joining elements 9 located downstream of the frame 4, relative to the feed direction A, and designed to join, respectively, the head flaps of the film 3, prior to the arrival of the groups 2 of products, and the tail flaps of the film 3 after the passage of the groups 2 of products wrapped in film 3 beyond the first transversal joining elements 9.
  • the machine 100 also comprises second longitudinal joining elements 11 located close to the frame 4 (above the latter), and designed to join two longitudinal superposed flaps of the film 1 at the formation of the package 1.
  • the machine 100 comprises at least two of the walls 6, 7 forming the channel 8 movable towards and away from each another by a movement device 12 connected to the frame 4, so as to allow the modification, at least temporarily, of the size of the tubular channel 8 in order to reduce the cross section of the tubular channel 8 during the passage of the groups 2 of products and to obtain a reduction in the overall size of the groups 2 of products by flattening them.
  • tubular channel 8 may be formed by a set of separate walls (lower, upper and side) to form the channel 8, or by two individual C-shaped profiles facing each other (configuration not illustrated), or, also, by four corner segments which make up the bottom and top walls 6 and the side walls 7 (see Figures 4 and 5 ).
  • the folding elements 5 are formed by two pairs of flaps 5a and 5b positioned on both sides of the tubular channel 8 and by a pair of intersecting plates 5c positioned above the tubular channel 8 for guiding and retaining the superposed free flaps of the film 3 before they are joined with the second longitudinal joining elements 11.
  • first transversal joining elements 9 comprise two sealing bars positioned beyond the outlet of the tubular channel 8 combined with a knife (not illustrated) for the separation of the completed package 1 from the subsequent package being formed.
  • the second longitudinal joining elements 11 comprise a sealing head configured to hot seal the superposed flaps of the film 3.
  • the movement device 12 comprises at least a first shaft 14 with motor-driven screw and rotatably connected to a pair of vertical supporting arms 15 associated with the side walls 7 of the frame 4 (see Figures 2 to 5 ).
  • the first screw shaft 14 is configured for moving, in both directions, the pair of arms 15 so as to allow a movement towards and away from each other, thereby obtaining a variation, even temporary, of the width L of the tubular channel 8.
  • the first screw shaft 14 has two threads in opposite directions, separate from each other to allow, during its rotation (in either direction), the movement towards or away from each other of the arms 15.
  • the device 12 comprises a second shaft 16 with a motor-driven screw positioned parallel to the first screw shaft 14 which is motor-driven and rotatably connected to vertical arms 17 supporting the folding elements 5.
  • the second screw shaft 16 is configured for moving, in both directions, the vertical supporting arms 17 so as to allow a movement towards and away from each other, thereby obtaining a variation, even temporary, of the dimensions of the folding elements 5.
  • the modification of the folding elements 5 is correlated with the modification of the width L of the tubular channel 8 in such a way as to adapt the superposed flaps of the film 3 to the new size.
  • first 14 and the second 16 screw shaft are connected to a single drive unit M (for example by means of transmission belts).
  • the two screw shafts 14 and 16 may be connected to independent drive units.
  • the machine 100 comprises the sensors 18 for detecting the compressive force connected at least to the first screw shaft 14 (but they might also be connected to the second screw shaft 16) and configured to send a corresponding signal relating to the compressive force value to a control unit 19 connected to the drive unit(s) M.
  • the detection sensors 18 may be of the load cell type interposed between the first arms 15 and the side walls 7 in such a way as to check the compressive force imparted by the first arms 15 on the side walls 7.
  • control unit 19 is programmed for turning ON or OFF the drive unit(s) M for moving the side walls 7 and the folding elements 5 by a stroke equivalent to a compression value between a minimum and a maximum stroke range, as a function of a plurality of parameters preset in the control unit 19 and the detection signal sent by the detection sensors 18.
  • control unit 19 has memory banks in which are set the predetermined minimum and maximum compression values and calculated as a function, for example, a series of parameters, starting from the type of final format of the package to be obtained:
  • the activation of the motor(s) M determines the start of the compression stroke and, when the compression value recorded by the sensors 18 enters the desired threshold (ranging between the minimum and a maximum values), the unit 19 may already stop the motor(s) M. Obviously, the compression may be increased, upon the decision of the operator, but only until reaching the maximum set value.
  • the machine 100 also comprises dynamic contact elements 20 associated with the folding elements 5 and positioned outside and at a predetermined distance from the two side walls 7 of the frame 4 (see Figure 5 ).
  • the dynamic contact elements 20 are configured to oppose, if necessary, a deformation, towards the outside, of the side walls 7 of the frame 4.
  • the dynamic contact elements 20 have the capacity, once in contact with the corresponding side wall 7, to make a counter push on the wall itself, but at the same time to avoid any block on the feed movement of the wrapping film 3.
  • these contact elements 20 may consist of rollers which can turn idly and are connected (by means of supporting shafts) to the folding elements 5.
  • the rollers 20 are arranged a few millimetres away from the corresponding side wall 7 and they adapt to the movement of the side walls 7 thanks to the translation of the folding elements 5.
  • rollers 20 are designed to oppose this movement towards the outside, maintaining the parallelism of the walls 7 and their position in compression. Moreover, since the rollers 20 can rotate freely, they do not oppose the feed movement of the film 3 during the step of packaging the groups 2 of products.
  • rollers 20 there may be motor-driven belts (not illustrated) looped on pairs of pulleys and again supported by the folding elements 5.
  • the groups of products are reduced in size in terms of width in a short time and without excessively altering the machine structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP18722738.4A 2017-04-27 2018-04-26 Method for making a package for groups of products and machine implementing the method Active EP3615429B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102017000046052A IT201700046052A1 (it) 2017-04-27 2017-04-27 Metodo per la realizzazione di una confezione per gruppi di prodotti e macchina attuante tale metodo.
PCT/IB2018/052891 WO2018198058A1 (en) 2017-04-27 2018-04-26 Method for making a package for groups of products and machine implementing the method

Publications (2)

Publication Number Publication Date
EP3615429A1 EP3615429A1 (en) 2020-03-04
EP3615429B1 true EP3615429B1 (en) 2021-03-03

Family

ID=59700144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18722738.4A Active EP3615429B1 (en) 2017-04-27 2018-04-26 Method for making a package for groups of products and machine implementing the method

Country Status (3)

Country Link
EP (1) EP3615429B1 (it)
IT (1) IT201700046052A1 (it)
WO (1) WO2018198058A1 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111907839A (zh) * 2020-08-25 2020-11-10 陈美华 一种服装生产用废布余料打包设备
CN115303584B (zh) * 2022-09-07 2024-03-08 佛山市驰力科技有限公司 一种用于床垫自动包装流水线的填料设备

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679379A (en) * 1983-09-13 1987-07-14 Cassoli S.R.L. Macchine Automatiche Confezionatrici Automatic bundling machine
ITBO20050774A1 (it) * 2005-12-20 2007-06-21 Tissue Machinery Co Spa Metodo per la realizzazione di una confezione per gruppi di prodotti e relativa macchina attuante tale metodo
US10196162B2 (en) * 2014-05-14 2019-02-05 Tissue Machinery Company S.P.A. Apparatus for packaging batches of products packed in cartons or in wrapping film

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
IT201700046052A1 (it) 2018-10-27
EP3615429A1 (en) 2020-03-04
WO2018198058A1 (en) 2018-11-01

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