EP3278969B1 - Vorrichtung zum stanzen von in einer rolle aufgewickelten einkaufsbeuteln mit griffen - Google Patents

Vorrichtung zum stanzen von in einer rolle aufgewickelten einkaufsbeuteln mit griffen Download PDF

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Publication number
EP3278969B1
EP3278969B1 EP17184309.7A EP17184309A EP3278969B1 EP 3278969 B1 EP3278969 B1 EP 3278969B1 EP 17184309 A EP17184309 A EP 17184309A EP 3278969 B1 EP3278969 B1 EP 3278969B1
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EP
European Patent Office
Prior art keywords
die
cutting
bags
strip
blocking
Prior art date
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Active
Application number
EP17184309.7A
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English (en)
French (fr)
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EP3278969A1 (de
Inventor
Roberto Trezzi
Maurizio Toniato
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Mobert Srl
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Mobert Srl
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Publication of EP3278969A1 publication Critical patent/EP3278969A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/003—Flexible containers made from sheets or blanks, e.g. from flattened tubes made from tubular sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/142—Cutting, e.g. perforating, punching, slitting or trimming using presses or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/872—Forming integral handles on bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/86—Forming integral handles or mounting separate handles
    • B31B70/874—Forming integral handles or mounting separate handles involving punching or cutting

Definitions

  • the object of the present invention is a die-cutting device, particularly for an automatic heat-sealing machine, apt to produce die-cut handles of shopper-type bags, also known by the term "T-shirt bag", said machine being fed, also continuously, with one or more flattened tubular films, in plastic material, or with one or more strips of heat-sealed and pre-cut bags.
  • Rolls of pre-cut bags and with die-cut handles of the shopper type have been known for some time and are normally used, for example, in the fruit and vegetables departments of supermarkets for inserting the goods to be weighed.
  • the handles of the bag are used to close the bag before weighing.
  • rolls of shopper bags can also have different uses.
  • one of the known methods is alternative die-cutting with toothed blade, which has the disadvantage of requiring the film to be at a standstill during the die-cutting.
  • the die-cutting with toothed blade creates a jagged cutting edge, making the bag unsightly and having points of breakage of the bag itself during the traction of the handles.
  • Said die-cutting assembly which performs a cut on the fly of the film, that is without counter plate for the cutting means, provides a system of pre-blocking of the film formed by two movable pressers and two respective rubber abutments, intended to block the film, and by a soft central buffer which pushes the central art of the film lightly so as to tension it in order to allow the blade to perform a more uniform die-cutting and, consequently, obtain a product of greater quality.
  • the rubber buffer forming a tension linked to the consistency of the rubber, is very affected by the thickness and the quality of the film to be cut. This is particularly disadvantageous in the case of film or strips of bags with side gussets such as those of shopper bags made with biodegradable film as laid down by recent regulations adopted by some European countries.
  • GB 2 168 640 A describes a device for die-cutting handles with bean shape in webs of plastic sheet material, wherein two webs of material are made to move forwards respectively above and below a wedge-shaped punch. In the upper web along the boundary of the hole incisions are formed so that small bridges remain which retain the die-cut material, while in the lower web a hole is made with removal of the die-cut material.
  • the object of the present invention is to make a device for the die-cutting of one or more flattened tubular films or of one or more strips of heat-sealed and pre-cut bags to make a plurality of bags with handles of the shopper type or T-shirt bag which overcomes the disadvantages of the prior art, allowing efficient die-cutting without being affected by the thickness and/or quality of the film.
  • a further object is that of having available such a die-cutting device which is easy to make and to manage as well as usable in heat-sealing machines known in the art.
  • the die-cutting device according to the present invention is made up of a lower fixed part carrying a plate 1 (in detail in Fig. 2 ) and an upper movable part, opposite to the lower fixed part.
  • Said upper movable part comprises an outer blocking plate 5 attached on a movable beam 6, a cutting blade 7, also supported by the movable beam 6, and an inner blocking plate 10 attached to the beam 6 but placed inside said cutting blade 7.
  • an incision or recess 2 is formed ( Fig. 2 ) coinciding with the shape of the blade 7 of the die-cutting machine, generally having such a shape as to form an opening 52 ( Fig. 5 ) in the flattened tubular film or in the strip of heat-sealed bags 50 fed to said die-cutting machine 100, whose shape can be, for example, that illustrated in Figure 5 .
  • an elastic compensation element Adjacent to the recess 2 and above the fixed plate 1, an elastic compensation element is placed, such as for example a rubber profile 3 which serves as abutment to the upper movable blocking plates 5 and 10.
  • Both the upper plates 5 and 10 which are coaxial one in relation to the other, are shaped so that their profile is adjacent to the cutting blade 7.
  • the coaxial plates 5, 10 are situated on a same horizontal plane when in position of machine open with film free.
  • each of the upper blocking plates 5 and 10 in the area adjacent to the cutting blade 7, has a pointed projection 8 which has the function of blocking tooth.
  • the two upper movable plates 5 and 10 are subjected to respective independent elastic means, more particularly springs 12, 12' so that the blocking of the inner and outer parts of the strip of film 50 is independent of the thickness, self-adapting to the thickness of the film 50 to be blocked.
  • the two coaxial plates 5, 10 are apt to block one of the two surfaces of the film 50 against the counter plate 1 and thanks to the springs 12, 12' said plates 5 and 10 can adapt to the thickness of the film 50 when said coaxial plates 5 and 10 are in contact with said film 50 lying on the lower plate 1.
  • a nozzle 11 which, at the unblocking of the film 50 after die-cutting, emits a puff of air which facilitates the removal of the scrap, pushing it through an opening 4 formed at the centre of the lower plate 1 towards the underlying system of aspiration of the die-cutting scrap following the cutting.
  • the blocking system of the present die-cutting device 100 constituted by the upper plates 5, 10, by the respective teeth 8 and by the lower plate 1 and elastic abutment 3, therefore goes to block both the area of the film 50 with gussets 51 which has a thickness equal to four layers of film, and the central area 52 which has a thickness equal to two layers of film: the elastic compensation element, such is the rubber 3, allows secure blocking of the central area 52 of the strip of film 50 which has half the thickness (two layers of film) with respect to the lateral outer zone of the gussets 51 (four layers of film).
  • the die-cutting device 100 described above could also be made upside down, that is with the fixed plate 1 placed in an upper position with respect to the film 50 and the movable blocking plates 5, 10 placed in a lower position with respect to the film 50, or both the lower plate 1 and the upper plates 5 and 10 could be movable without thereby departing from the scope of the present invention.
  • said beam 6 can rise and lower in phase with the movement of a trolley 80 ( Fig. 6 ), placed in a heat-sealing machine of known type in which the present die-cutting machine 100 can be installed: said trolley 80 is apt to determine an elongation of the path of the film 50 in input to the die-cutting machine 100 and therefore a momentary stop of the film when it is die-cutting, as will be explained here below by way of example.
  • the movable beam 6 lowers, pressing the upper plates 5 and 10 against the lower plate 1. Continuing in the stroke downwards, the blade 7 goes then to engrave the film 50 determining the cutting of the part to be removed.
  • the present die-cutting device 100 which allows a cut of the film to be performed "on the fly", that is without counter plate for the cutting blade, is particularly advantageous when the cutting blade 7 has to act on a strip of tubular film which does not have a single thickness in its entire extension: as illustrated in Figure 5 , to allow the obtaining of handles, the strip of tubular film 50 has generally side gussets 51 at which the thickness of the strip of film 50 is greater with respect to the central area of the strip.
  • the present die-cutting device 100 is particularly advantageous when installed in an automatic heat-sealing machine such as that described in Italian patent No. 1.394.527 in the name of the Applicant, where the die-cutting machine is placed between two loops in which the film can be accumulated when the trolley 80 stops the sliding of a portion of the tubular film with respect to the die-cutting station.
  • the automatic heat-sealing machine described in the Italian patent no. 1.394.527 is continuously fed with at least one flattened tubular film 50 in plastic material and is suitable for producing and winding at least one strip of pre-cut bags with die-cut handles.
  • Said heat-sealing machine comprises a station 40 for winding of the strip of bags and, for each tubular film 50:
  • the die-cutting station 100 is in accordance with the present invention and is placed upstream of the heat-sealing and pre-cutting station 60 yet, without departing from the scope of the invention, the present die-cutting station 100 can be placed downstream of the heat-sealing and pre-cutting station 60.
  • a pair of motorised rollers 170 placed between the die-cutting station 100 and that of heat-sealing and pre-cutting 60, maintains the tension of the film 50 constant between the two stations, when the film does not advance on the flat between them.
  • the present device can be applied also on machines not provided with said motorised rollers.
  • the means apt to stop the sliding of a portion of the tubular film 50 with respect to the die-cutting station 100 and to that of heat-sealing and pre-cutting 60 comprise at least one trolley 80 (which carries the motorised rollers 90 and 91) and two rollers 110 and 120 integral with the frame of the machine.
  • the trolley 80 translates along rectilinear guides 190 in an alternate direction with respect to the forward movement of the tubular film 50 which moves from left to right in the example given.
  • the film 50 entering the heat-sealing machine accumulates in the loop 130, while the winding station 40 (or another apparatus placed downstream of the heat-sealing machine) is fed by the strip of pre-cut and die-cut bags which had previously accumulated in the loop 140.
  • the trolley 80 reverses its motion, allowing the film 50 accumulated in the loop 130 to bring itself at the die-cutting stations 100 and the die-cut film 50 to bring itself at the station of heat sealing and pre-cutting 60, accumulating in the loop 140 the strip of pre-cut and die-cut bags with which to feed subsequently the winding station 40.
  • the die-cutting and the heat-sealing of the film 50 are performed simultaneously.
  • one of the die-cutting 100 and heat-sealing and pre-cutting 60 stations is fixed while the other is mounted on a slide 150, movable on a support surface 160, which allows the distance between the die-cutting station 100 and that of heat-sealing and pre-cutting 60 to be varied in order to adapt it to the length of the bags to be produced.
  • the die-cutting station 100 is fixed while the heat-sealing and pre-cutting station 60 is mounted on the slide 150 yet, without departing from the scope of the invention, the die-cutting station 100 can be mounted on the slide 150 and the heat-sealing and pre-cutting station 60 kept fixed.
  • the die-cutting station 100 can be placed upstream or downstream of the heat-sealing and pre-cutting station without thereby departing from the scope of the present invention.
  • the winding station 40 is any type of machine for winding film in rolls known in the art, for example the winding station described in the Italian patent no. 1.394.527 incorporated here in full for reference, is particularly suitable for winding strips of bags with gusset which in the area of the handles have folds which, superimposing when a considerable number of bags is rolled, can create rolls of bags with different diameter on a par with the number of bags wound.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (8)

  1. Stanzvorrichtung (100) zum Stanzen mindestens eines röhrenförmigen Films oder eines Streifens von heißversiegelten und vorgeschnittenen Beuteln (50) mit seitlichen Zwickeln (51) zum Herstellen von Griffen eines Einkaufsbeutels oder T-Shirt-Beutels, wobei die Vorrichtung aus einem festen unteren Abschnitt und einem oberen bewegbaren Abschnitt oder umgekehrt besteht, und umfassend:
    ein Schneideblatt (7), das geeignet ist, um eine Öffnung (52) auf dem röhrenförmigen Film (50) oder auf dem Streifen von Beuteln herzustellen,
    Blockiermittel, die sich auf dem unteren Abschnitt und/oder auf dem oberen Abschnitt der Stanzvorrichtung (100) befinden, zum Blockieren des röhrenförmigen Films (50) oder des Streifens von Beuteln,
    eine Öffnung (4) in dem unteren oder oberen Abschnitt für den Auswurf der Stanzreste nach dem Schneiden,
    wobei die Blockiermittel aus einer bewegbaren äußeren Platte (5) und einer bewegbaren inneren Platte (10) bestehen, welche koaxial zueinander sind und welche das Schneideblatt (7) einschließen, wobei sich die koaxialen Platten (5, 10) bei offener Maschine mit freiem Film auf einer gleichen horizontalen Ebene befinden,
    wobei die zwei koaxialen Platten (5, 10) geeignet sind, um den Film (50) oder den Streifen von Beuteln gegen eine Gegenplatte (1) zu blockieren, welche mit dem festen Abschnitt einstückig ist und den zwei koaxialen Platten (5, 10) gegenüberliegt, wobei die Öffnung (4) gebildet wird,
    wobei ein elastisches Kompensierungselement (3) zwischen den koaxialen Platten (5, 10) und der Gegenplatte (1) platziert ist, um eine sicheres Blockieren auf den unterschiedlichen Dicken des röhrenförmigen Films oder des Streifens von Beuteln (50) durchzuführen,
    wobei das elastische Element (3) ein Gummiprofil ist, das über der Gegenplatte (1) platziert ist, und
    wobei die äußere Blockierplatte (5) und die innere Blockierplatte (10) jeweiligen unabhängigen elastischen Mitteln (12, 12') ausgesetzt sind.
  2. Stanzvorrichtung (100) nach Anspruch 1, wobei eine Vertiefung (2) auf der Gegenplatte (1) vorgesehen ist, die geeignet ist, um das Blatt (7) aufzunehmen.
  3. Stanzvorrichtung (100) nach einem der vorhergehenden Ansprüche, wobei die äußere Blockierplatte (5) und die innere Blockierplatte (10) durch einen Balken (6) getragen sind, der vertikal bewegbar ist, um die koaxialen Platten (5, 10) mit dem röhrenförmigen Film oder Streifen von Beuteln (50) in Kontakt zu bringen, wobei Letzterer gegen die Gegenplatte (1) blockiert wird.
  4. Stanzvorrichtung (100) nach Anspruch 3, dadurch gekennzeichnet, dass die äußere Blockierplatte (5) und die innere Blockierplatte (10) mit dem bewegbaren Balken (6) durch die jeweiligen unabhängigen elastischen Mittel (12, 12') verbunden sind.
  5. Stanzvorrichtung (100) nach einem der vorhergehenden Ansprüche, wobei das Profil jeder der koaxialen Blockierplatten (5, 10) in dem Bereich benachbart zu dem Schneideblatt (7) einen spitz zulaufenden Vorsprung (8) aufweist, der als Blockierzahn wirkt, wobei er das auf der Gegenplatte (1) vorliegende elastische Element (3) graviert.
  6. Stanzvorrichtung (100) nach einem der vorhergehenden Ansprüche, wobei im Inneren des Schneideblatts (7) an dem mittigen Abschnitt der inneren Platte (10) eine Düse (11) vorhanden ist, die, nach dem Entblocken des röhrenförmigen Films oder Streifens von Beuteln (50), welches auf das Stanzen folgt, einen Luftstrom ausgibt, der die Entfernung der Reste erleichtert, wobei er sie durch die Öffnung (4) drückt.
  7. Automatische Heißsiegelmaschine, der kontinuierlich mindestens ein abgeflachter röhrenförmiger Film (50) aus Kunststoffmaterial zugeführt wird und die sich eignet, um mindestens einen Streifen von vorgeschnittenen Beuteln mit gestanzten Griffen herzustellen und zu wickeln, umfassend
    - eine Heißsiegel- und Vorschneidstation (60), die sich eignet, um einen Streifen von heißversiegelten und vorgeschnittenen Beuteln aus dem röhrenförmigen Film (50) herzustellen;
    dadurch gekennzeichnet, dass sie ferner eine Stanzvorrichtung (100) nach einem der vorhergehenden Ansprüche umfasst.
  8. Heißsiegelmaschine nach Anspruch 7, wobei die Stanzvorrichtung (100) stromaufwärts oder stromabwärts von der Heißsiegel- und Vorschneidstation (60) platziert ist, wobei die Stanzvorrichtung auch in der Lage ist, in Bezug auf die Heißsiegel- und Vorschneidstation (60) bewegbar zu sein.
EP17184309.7A 2016-08-05 2017-08-01 Vorrichtung zum stanzen von in einer rolle aufgewickelten einkaufsbeuteln mit griffen Active EP3278969B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102016000082865A IT201600082865A1 (it) 2016-08-05 2016-08-05 Dispositivo per la fustellatura di sacchetti con manici di tipo “shopper” avvolti in rotolo

Publications (2)

Publication Number Publication Date
EP3278969A1 EP3278969A1 (de) 2018-02-07
EP3278969B1 true EP3278969B1 (de) 2020-10-07

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EP (1) EP3278969B1 (de)
DK (1) DK3278969T3 (de)
IT (1) IT201600082865A1 (de)

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CN109571622B (zh) * 2019-02-17 2024-04-12 盐城市罗氏鞋业机械有限公司 一种全自动横移旋转头裁切机冲头部件
CN113547790B (zh) * 2021-07-27 2022-12-06 河南心容心包装材料有限公司 一种塑料包装袋生产加工系统
CN114102755A (zh) * 2021-10-09 2022-03-01 江苏盈达机电科技有限公司 一种用于中央空调末端风口铝箔保温棉的裁切装置
CN115107320B (zh) * 2022-07-23 2023-09-26 连云港乐富新材料有限公司 适用于塑料包装袋的不同厚度膜体熔切导向装置及方法
CN117381910B (zh) * 2023-12-07 2024-02-20 盐城市恒丰海绵有限公司 一种防静电海绵用模切设备及其使用方法

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DE3445660A1 (de) * 1984-12-14 1986-06-26 LEMO M. Lehmacher & Sohn GmbH Maschinenfabrik, 5216 Niederkassel Vorrichtung zum einbringen von grifflochstanzungen in taktweise bewegte kunststoffolienbahnen
DE19623330C1 (de) * 1996-06-12 1997-11-27 Lemo Maschb Gmbh Vorrichtung zum Ausstanzen und Entfernen eines Abfallbutzens von zu einem Packen zusammengefaßter Tragetaschen oder Beuteln aus Kunststoffolie, insbesondere im Zuge der Herstellung von Knotenbeuteln
IT1394527B1 (it) * 2009-03-20 2012-07-05 Mobert Srl Macchina termosaldatrice per la produzione contemporanea di una pluralita' di rotoli di sacchetti pretagliati e con manici fustellati

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IT201600082865A1 (it) 2018-02-05
DK3278969T3 (da) 2021-01-11

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