EP1029787A1 - Maschine zum Umhüllen von Gruppen von Produkten mit einer Kunststofffolie - Google Patents

Maschine zum Umhüllen von Gruppen von Produkten mit einer Kunststofffolie Download PDF

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Publication number
EP1029787A1
EP1029787A1 EP00830107A EP00830107A EP1029787A1 EP 1029787 A1 EP1029787 A1 EP 1029787A1 EP 00830107 A EP00830107 A EP 00830107A EP 00830107 A EP00830107 A EP 00830107A EP 1029787 A1 EP1029787 A1 EP 1029787A1
Authority
EP
European Patent Office
Prior art keywords
group
arm
products
ring
wrapped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00830107A
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English (en)
French (fr)
Other versions
EP1029787B1 (de
Inventor
Mauro Cere'
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.)
Aetna Group SpA
Original Assignee
Aetna Group SpA
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Filing date
Publication date
Application filed by Aetna Group SpA filed Critical Aetna Group SpA
Publication of EP1029787A1 publication Critical patent/EP1029787A1/de
Application granted granted Critical
Publication of EP1029787B1 publication Critical patent/EP1029787B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B11/008—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material by webs revolving around articles moved along the axis of revolution

Definitions

  • the present invention relates to a machine for wrapping groups of products with plastic film.
  • An orbital stretch wrapping machine has a horizontal table along which the products or groups of products are fed.
  • the feed table is located on opposite sides of a wrapping device consisting of a ring or passing through the ring, and an unwinding unit consisting of a roll of plastic film and an idle roller which feeds the plastic film.
  • the unwinding unit motor-driven, usually rotates together with the ring, and, during the rotation, the idle roller is located at a fixed distance from the roll in such a way that the film is unwound in a spiral shape around the group of products being fed in.
  • the group of products is wrapped either in a break in the feed table so that the film is wrapped right around the products or together with the feed table and the latter is then pulled out of the group upon completion of the wrapping operation.
  • Machines made in this way make it possible to wrap groups of products at high speeds but have several drawbacks when the products being wrapped are much wider or longer than they are thick (for example, door and window frames).
  • the portion of film that has to be unwound before the film again comes into contact with the main surface of the product (lying in a horizontal plane) is very large and only touches the product along the edge at quite a long distance from the roll.
  • This portion of film thus has a large free surface area and this, combined with the stretch property of the film and the fact that it is very thin, tends to resist the rotating action of the roll and roller assembly and to trap air during the downward stroke towards the surface being wrapped (to create what is commonly known in the trade as a "balloon effect").
  • the balloon effect prevents it from adhering well to the product surface.
  • the film also tears when it comes into contact with the following edge of the group of products not only because it does not uniformly adhere to the product surface but also because of the previous resistance generated by the portion of film in relation to the rotation speed of the roll and roller assembly.
  • the Applicant has designed and constructed a machine for wrapping products with stretch film in which the roll and roller assembly adjusts to the size of the products to be wrapped, thus eliminating the balloon effect.
  • the wrapping mechanisms are rapid and reliable and the basic structure of the machine is not very different from that of existing machines of this kind.
  • Machines of this kind comprise a horizontal table 3 along which the group 1 of products is fed in the direction indicated by the arrow A in Figure 2 (the table 3 being illustrated schematically since it is of the known type).
  • the feed motion causes the product group 1 to move past a ring 4 equipped with a unit 5 for feeding the film 2 spirally around the product group 1 in such a way as to completely wrap the product group.
  • the feed unit 5 comprises a film roll 6 and an idle roller 7 that feeds the film around the group 1 of products, which are placed alongside each other and which are associated with the ring 4, the latter being power driven by means 8 (of known type and therefore illustrated schematically in Figure 1) mounted on a fixed supporting structure 9 in such a way as to rotate about the axis Y (horizontal).
  • the film 2 feed unit 5 is linked to the rotation of the ring 4 through a supporting arm 10 which is acted upon by means 11 designed to adjust its position relative to the surfaces, labelled 1a, 1b, 1c and 1d, of the group 1 of products being wrapped and relative to the position assumed by the ring 4 when it rotates: it is thus possible to obtain a guide and to enable the film 2 to be unwound close to the surfaces 1a, 1b, 1c, 1d independently of the shape and size of the group 1 of products passing through the ring 4.
  • the position adjustment means act directly on the supporting arm 10 and consist of cam means 11 which act on the arm.
  • the cam means 11 vary according to the shape and size of the product group 1 to be wrapped.
  • the cam means 11 may comprise a structure or track 15 (which, in the case illustrated in Figure 3, is substantially elliptical in shape and inclined relative to the machine axes) located behind the ring 4 relative to the feed direction A of the product group 1 and slidably connected to a cam follower roller 14 linked to the arm 10.
  • the specially designed shape of the track 15 is the result of numerous studies and tests performed by the Applicant in order to provide the optimum path for the arm 10 according to the different shapes and sizes of the products to be wrapped.
  • the track 15 may be made up of a plurality of interchangeable segments 15a joined to each other by detachable linking means 16 so that the size of the track can be changed according to the shape and size of the group 1 of products to be wrapped.
  • Said link means 16 may consist of plates 16p also used to mount the track 15 on the fixed structure 9.
  • FIG. 2 shows that the roll 6 is connected directly to the ring 4, while the idle roller 7 is rotatably mounted on the free end of the supporting arm 10: looking in more detail, the roll 6 is connected to the ring 4 through a plate 4p to which a pair of transmission rollers 6r may also be linked, while the idle roller 7 is indirectly linked to the ring 4 upstream or downstream of the roll 6 relative to the direction of rotation of the ring 4.
  • the arm 10 which supports the idle roller 7 has, at the end of it that is linked to the ring 4, a rod 13 which passes through the ring and which, through another rigid connecting arm 14b, mounts the cam follower roller 14 that is slidably connected to the track 15: in this way, the position of the arm 10 may be adjusted as the ring 4 turns.
  • the supporting arm 10 varies in length according to the shape and size of the product group 1 thanks to means 12 designed to automatically control its movement according to its position relative to the product group 1.
  • the arm 10 consists of two tubular parts 17 and 18 (see also Figure 6) connected to each other by said adjustment means 12, which consist of a screw and nut thread connection 19 and 20 located inside the two parts 17 and 18.
  • the screw and nut thread assembly 19 and 20 is connected to means 21 for controlling the length of the arm 10: in practice, as can be seen in Figure 7, there may be a motor 21m located inside one of the tubes 17 or 18 and designed to turn the screw 19 in one direction or the other (see arrows F in Figures 6 and 7) depending on whether the arm 10 has to be shortened or lengthened according to the shape and size of the group 1 of products being wrapped.
  • the activation of the motor 21m may be controlled by an external CNC unit 21u programmed according to the size of the product group 1 so as to provide the optimum wrapping motion for each cycle.
  • the length of the supporting arm 10 can be changed manually.
  • the arm 10 again consists of two matching tubular parts 17 and 18 but in this case joined together by manual engagement / disengagement means 22 passing across the two parts.
  • the means 22 consist of two openings 23 and 24, the one labelled 23 being a slot through which a pin 25 equipped with a threaded nut 26 can be passed in order to enable the operator to manually tighten and slacken two parts 17 and 18.
  • the operator can slide the two parts 17 and 18 relative to each other (again in the directions indicated by the arrows F in Figure 6) in such a way as to lengthen or shorten the arm 10 according to the shape and size of the product group 1 before the group is wrapped.
  • a numeric scale 27 on the outside of the tubular part with the slot 23 may facilitate the manual adjustment of the arm 10 by clearly displaying the amount by which the length of the arm 10 must actually be adjusted.
  • the machine made in this way wraps the product group 1 by causing the roll 6 to perform a circular rotation, in this case counterclockwise (see arrow F1), while the arm 10 acts on the idle roller 7, which controls the feeding and application of the film 2 on the group 1, and places the roller in the optimum position relative to the surfaces 1a, 1b, 1c and 1d of the group 1 that differs each time according to the position of the idle roller 7 relative to the surfaces of the product 1 and its shape and size.
  • the positioning is performed by the cam follower roller 14 which runs in the track 15 and, if necessary, by adjusting the length of the arm 10: these two features make it possible to vary the angle of the arm 10 within the ring 4, increasing or decreasing the length of film 2 unwound from the roll 6 and its position relative to the surfaces to be wrapped, so that the wrapping direction of the film 2 over the product group 1 is always optimised.
  • the aims of the invention are therefore achieved by a minimal change in the structure of the machine which, however, makes the wrapping operation quick and easy and, above all, allows the film to adhere well to the surfaces of the group of products being wrapped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Basic Packing Technique (AREA)
EP00830107A 1999-02-16 2000-02-16 Maschine zum Umhüllen von Gruppen von Produkten mit einer Kunststofffolie Expired - Lifetime EP1029787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999BO000060A IT1308997B1 (it) 1999-02-16 1999-02-16 Macchina per l'avvolgimento di gruppi di prodotti con film plastico.
ITBO990060 1999-02-16

Publications (2)

Publication Number Publication Date
EP1029787A1 true EP1029787A1 (de) 2000-08-23
EP1029787B1 EP1029787B1 (de) 2003-01-15

Family

ID=11343700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830107A Expired - Lifetime EP1029787B1 (de) 1999-02-16 2000-02-16 Maschine zum Umhüllen von Gruppen von Produkten mit einer Kunststofffolie

Country Status (5)

Country Link
EP (1) EP1029787B1 (de)
AT (1) ATE231083T1 (de)
DE (1) DE60001185T2 (de)
ES (1) ES2190400T3 (de)
IT (1) IT1308997B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700742A (zh) * 2012-06-01 2012-10-03 安徽同曦金鹏铝业有限公司 一种铝合金型材缠绕裹膜机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024663A1 (de) 2009-06-12 2010-12-16 Becklönne, Dirk Verfahren und Vorrichtung zum Umhüllen von Stückgut
DE202009008118U1 (de) 2009-06-12 2009-11-12 Becklönne, Dirk Vorrichtung zum Umhüllen von Stückgut
CN108860694A (zh) * 2018-07-04 2018-11-23 合肥欧语自动化有限公司 一种五金管材自动化绕膜装置
CN110683095B (zh) * 2019-09-29 2021-06-04 龙南市嘉兆环保科技发展有限公司 一种包装纸板捆绑机
CN111776281A (zh) * 2020-05-28 2020-10-16 林日国 一种捆装纺织布匹自动打包机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152960A2 (de) * 1984-02-23 1985-08-28 Lantech, Inc. Umlaufende Folienwickelvorrichtung und Verfahren zum Zusammenfassen von Gegenständen mittels eines Einschlusswickels
US5123230A (en) * 1989-12-19 1992-06-23 B. Hagemann Gmbh & Co. Method and apparatus for wrapping articles in plastic
US5285891A (en) * 1992-06-01 1994-02-15 Liberty Industries Conveyor for rotary film wrapping apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152960A2 (de) * 1984-02-23 1985-08-28 Lantech, Inc. Umlaufende Folienwickelvorrichtung und Verfahren zum Zusammenfassen von Gegenständen mittels eines Einschlusswickels
US5123230A (en) * 1989-12-19 1992-06-23 B. Hagemann Gmbh & Co. Method and apparatus for wrapping articles in plastic
US5285891A (en) * 1992-06-01 1994-02-15 Liberty Industries Conveyor for rotary film wrapping apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102700742A (zh) * 2012-06-01 2012-10-03 安徽同曦金鹏铝业有限公司 一种铝合金型材缠绕裹膜机

Also Published As

Publication number Publication date
EP1029787B1 (de) 2003-01-15
DE60001185T2 (de) 2003-10-23
ES2190400T3 (es) 2003-08-01
DE60001185D1 (de) 2003-02-20
IT1308997B1 (it) 2002-01-15
ITBO990060A1 (it) 2000-08-16
ITBO990060A0 (it) 1999-02-16
ATE231083T1 (de) 2003-02-15

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