EP3587057B1 - Verbesserte schneidevorrichtung und verfahren zum abtrennen von beuteln für flexible verpackungen aus laminierten folien - Google Patents

Verbesserte schneidevorrichtung und verfahren zum abtrennen von beuteln für flexible verpackungen aus laminierten folien Download PDF

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Publication number
EP3587057B1
EP3587057B1 EP19182913.4A EP19182913A EP3587057B1 EP 3587057 B1 EP3587057 B1 EP 3587057B1 EP 19182913 A EP19182913 A EP 19182913A EP 3587057 B1 EP3587057 B1 EP 3587057B1
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EP
European Patent Office
Prior art keywords
blades
film
blade
cut
cutting
Prior art date
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Active
Application number
EP19182913.4A
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English (en)
French (fr)
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EP3587057A1 (de
Inventor
Roberto Trezzi
Maurizio Toniato
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.)
Mobert Srl
Original Assignee
Mobert 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
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Publication of EP3587057A1 publication Critical patent/EP3587057A1/de
Application granted granted Critical
Publication of EP3587057B1 publication Critical patent/EP3587057B1/de
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Classifications

    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/10—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge
    • B26D1/11—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge with a plurality of cutting members
    • B26D1/115—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge with a plurality of cutting members for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • 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
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • 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
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/06—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with blade, e.g. shear-blade, cutters or perforators
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/0006—Cutting members therefor
    • B26D2001/0066—Cutting members therefor having shearing means, e.g. shearing blades, abutting blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51538—Die-cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like

Definitions

  • the subject of the present invention is a device and a relative cutting method for the separation of bags for flexible packaging obtained from laminated films, for the containment of food for humans, animal feed, etc.
  • the laminated films used for the formation of these bags also comprise at least one layer of aluminium or in any case of materials that have a certain rigidity.
  • These laminated films are adequately shaped by folding and longitudinal sealing to form a tubular shape, forming any side gussets, seals and transversal cuts to separate the bags one from the other, or to cut the tubular shape to the length of the bag to be formed.
  • This operation is normally carried out by making a first cut at the theoretical distance of one millimetre from the apex 3 of the V-shaped die-cut 2.
  • the film is advanced by 2 mm from right to left with reference to Figures 1 to 3 , and a second cut is made by removing a portion of product 4 of 2 mm.
  • the film is continuously advanced for the execution of certain operations, such as longitudinal folding, and intermittently for the execution of other operations, such as precisely the die-cutting and transversal cutting.
  • the pair of blades is carried by a carriage that moves along a linear guide transversally to the film in one direction and in the other, cutting the film at each single stroke.
  • the strip of material that is cut by the two blades is expelled by a blow of air.
  • the object of the invention is to eliminate the drawbacks of the prior art illustrated above, in particular those found in the device that is the subject of document EP 18172308.1 .
  • the object of the invention is to improve the device and the method described in document EP 18172308.1 , preventing the material waste from staying attached to the bag being formed, or from getting caught between the cutting blades.
  • Another object of the invention is to provide a cutting device that is highly reliable and avoids down time in the process of manufacturing flexible packaging bags.
  • the device according to the invention for the transversal cutting of laminated films, at V-shaped die-cuts provided on that film at distances corresponding to the length of bags to be produced comprises at least two blades offset and spaced apart one in relation to the other, such as to be placed astride an apex of said die-cuts during said transversal cut, one of said blades acting against a side abutment to make a scissors cut of the film.
  • the device for the transversal cutting of laminated films according to the invention comprises three blades, two of these blades being aligned one with the other, while the third blade is offset and spaced apart with respect to them, such that the blades aligned on one side and the blade offset on the other are placed astride an apex of said die-cuts during said transversal cut, the blade offset and spaced apart being placed in an intermediate position with respect to the aligned blades and acting against a side abutment to make a scissors cut of the film.
  • Said blades are carried by a carriage moving along a linear guide placed transversally to the film.
  • Said blades are mounted on respective supports that run along a channel determined by two opposed fixed bars placed transversally to the film, and protrude below these bars through a narrow opening of said channel.
  • Figure 4 shows schematically in plan view a film 1 in an intermediate stage of the bag production process.
  • the film is unwound from a reel and initially fed continuously through a series of stations, where it undergoes in particular a longitudinal folding to form a tubular shape, and then intermittently to be subjected to operations that require the film to be at a standstill.
  • a device for transforming the advancement of the film from continuous to intermittent.
  • the film 1 shown in Figure 4 is downstream of such a device, and therefore undergoes stops during the advancement in order to be subjected to the various operations to be carried out on the stationary film, such as sealing, engraving, die-cutting, transversal cutting and so on.
  • film 1 which is a laminate comprising at least one layer of aluminium or in any case of a material with a certain rigidity, has been folded longitudinally to form a tubular shape, and on it V-shaped die-cuts have been made with rounded edges, at transversal lines 5 placed at a distance corresponding to the length of the bag to be obtained.
  • EP 18172308.1 proposed to remove this strip of material 4 in a single pass, by means of a pair of blades side by side, which, however, in the case of a slight advance of one blade with respect to the other during cutting, could determine the inconvenience shown in Figure 4 , i.e. the remainder of a small section of uncut material 4' with which the strip 4 remained attached to the bag to be formed.
  • the invention proposes the cutting device shown in Figures 5 to 9 , denoted overall by reference numeral 10.
  • the device 10 comprises three blades 11, 12, 13, mounted on respective supports 41, 42, 43 (see in particular Figures 7 and 9 ), carried by a plate 20 in the shape of an overturned L tilted through 180°, fixed to a second plate 21 in the shape of an overturned L, in turn fixed to a carriage 22 sliding transversally on a linear guide 23 arranged transversally to the machine.
  • the carriage 22 is moved by a toothed belt 24 fixed to the upper plate 21 by means of counter plates 25.
  • the toothed belt 24 is driven in reciprocal motion by means of a motor and corresponding pinion not shown.
  • carriage 22 can also be moved in another way, for example by means of worm gears and screw nuts, pneumatic actuators, and the like.
  • the supports 41, 42, 43 of the blades 11, 12, 13 run along a channel 27 determined by two opposed bars 30, 30 integral to the structure of the machine ( Figures 5 and 6 ).
  • Channel 27 is open above to allow the insertion therein of the blade supports 41, 42, 43, and opens at the bottom as a funnel to allow the exit of the blades 11, 12, 13 that protrude slightly beyond the lower plane 31 of the bars 30.
  • film 1 has been schematised with a dotted line and is moved intermittently from left to right as indicated by the arrows F.
  • the pressers 32 are carried by an arm (or rather two side arms) 50, oscillating around a fulcrum 51, which makes the pressers perform a movement along an arc of circle, for the purposes that will be mentioned here below.
  • the three blades 11, 12, 13 are arranged so that the blades 11, 13 are perfectly aligned in the transversal direction of the machine, while the blade 12 is slightly offset with respect thereto by a quota corresponding to the width d of the strip 4 of material to be trimmed (normally 2-2.5 mm but could vary by changing the distance between the blades), and spaced apart transversally, so as to result in an intermediate position between the blades 11 and 13.
  • the front blade of the two aligned blades 11, 13 performs the cut, and the other one that follows it remains inactive, while the offset intermediate blade 12 cuts the trimmed part or strip of material 4 in both directions of movement of carriage 22.
  • blade 12 is made to slide in contact with a side abutment, thus cutting like scissors.
  • This side abutment is provided by one of the two 32 pressers (the one on the left in Figures 5 and 6 ) which, during the cutting stroke of the blades, slightly touches the blade 12 to allow the "scissors" trimming cut (see in particular the enlargement of Figure 6a ).
  • the movement of pressers 32 around the fulcrum 51 of the arms 50 along an arc of circle allows the corresponding stop 32 to approach blade 2 without interfering with the tip of the blade itself.
  • This solution is optimal because it does not force the blades to perform the whole stroke corresponding to the length of the bars 32 to come out from the same at each transversal cut to allow the rise of the pressers 32 after the advancement of the film, but it is possible to optimise the stroke of the blades, varying it according to the width of the bag to be cut, being able to achieve higher production speeds.
  • the material waste 4 is evacuated between the two pressers 32 by means of air nozzles 35 placed at the two sides of the blade assembly ( Figure 7 ), which blow downwards the trimmed part 4, which is collected by an underlying suction hood (not shown).
  • the supports 41, 43 of the side blades 11, 13 are fixed, while the support 42 of the central blade 12 can be adjusted forwards and backwards by means of an adjustment screw 45 ( Figure 8 ). In this way, it is easy to adjust the interference between the trimming blade 12 and the abutment plane of the corresponding mobile presser 32.
  • the blades 11, 12, 13 have been indicated as double-edged, i.e. with a V-shaped tip, in order to be able to cut in one direction and in the other.
  • the side blades 11, 13 could be single cut, as also the central blade 12 could be made up of two perfectly aligned opposed single-cutting blades.
  • only one of the two lateral blades 11, 13 can be provided, in which case the cut would only take place in one direction of movement of the carriage, with an empty return stroke.
  • both blades could be single-cutting, unidirectional.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)

Claims (10)

  1. Vorrichtung zum Querschneiden von Verbundfolien (1) an V-förmigen Stanzungen (2), die auf der Folie in Abständen entsprechend der Länge der herzustellenden Beutel vorgesehen sind, dadurch gekennzeichnet, dass die Vorrichtung (10) mindestens zwei Klingen (11, 13) und (12) umfasst, die mit Abstand angeordnet und gegeneinander versetzt sind, sodass sie während des Querschneidens über einen Scheitel (3) der Stanzungen (2) hinweg angeordnet sind, wobei eine (12) der Klingen gegen einen seitlichen Anschlag wirkt, um einen Scherenschnitt der Folie (1) durchzuführen.
  2. Vorrichtung zum Querschneiden von Verbundfolien (1) nach Anspruch 1, dadurch gekennzeichnet, dass sie drei Klingen (11, 12, 13) umfasst, wobei zwei der Klingen (11, 13) zueinander ausgerichtet sind, während die dritte Klinge (12) mit Abstand und versetzt zu ihnen angeordnet ist, sodass die Klingen (11, 13) auf einer Seite und die Klinge (12) auf der anderen Seite während des Querschneidens angeordnet sind, wobei sie einen Scheitelpunkt (3) der Stanzungen (2) überspannen, wobei die mit Abstand angeordnete und versetzte Klinge (12) in einer Zwischenposition in Bezug auf die Klingen (11, 13) angeordnet ist und gegen einen seitlichen Anschlag wirkt, um einen Scherenschnitt des Films (1) durchzuführen.
  3. Vorrichtung zum Schneiden nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Klingen (11, 12, 13) von einem Schlitten (22) getragen werden, der entlang einer quer zur Folie (1) ausgelegten Linearführung (23) beweglich ist.
  4. Vorrichtung zum Schneiden nach Anspruch 3, dadurch gekennzeichnet, dass die Klingen (11, 12, 13) auf entsprechenden Trägern (41, 42, 43) montiert sind, die entlang eines Kanals (27) laufen, der durch zwei gegenüberliegende feste Stangen (30, 30) bestimmt ist, die quer zur Folie (1) angeordnet sind, und unter diesen Stangen durch eine enge Öffnung des Kanals (27) vorstehen.
  5. Vorrichtung zum Schneiden nach Anspruch 4, dadurch gekennzeichnet, dass sie ein Paar von Pressvorrichtungen (32) umfasst, die unter den Stangen (30, 30) angeordnet und von unten nach oben und umgekehrt beweglich sind, um gegen Gummianschläge (31) zu stoßen, die in den Stangen vorgesehen sind, um die Folie (1) während des Schneideschritts zu fixieren, wobei eine der Pressvorrichtungen als Seitenanschlag für die Klinge (12) dient.
  6. Vorrichtung zum Schneiden nach Anspruch 5, dadurch gekennzeichnet, dass die genannten Pressvorrichtungen (32) sich entlang eines Kreisbogens oder vertikal entlang einer geraden Linie bewegen.
  7. Vorrichtung zum Schneiden nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass an den beiden Seiten der Klingenanordnung (11, 12, 13) Luftdüsen (35) vorgesehen sind, die auf den Materialabfall (4) blasen, um ihn durch die untere Öffnung des genannten Kanals (27) abzusaugen.
  8. Vorrichtung zum Schneiden nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass die Halterungen (41, 43) der Klingen (11, 13) fest sind, während die Halterung (42) der Klinge (12) mittels einer Einstellschraube (45) einstellbar ist.
  9. Verfahren zum transversalen Schneiden einer laminierten Folie (1) für die Herstellung von Beuteln, wobei die Folie (1) zuvor V-förmigen Stanzungen (2) in Abständen, die der Länge der herzustellenden Beutel entsprechen, unterzogen wurde, dadurch gekennzeichnet, dass ein Doppelschnitt vorgesehen ist, der gleichzeitig mit zwei Klingen (11, 13) und (12) durchgeführt wird, die voneinander mit Abstand und versetzt zueinander angeordnet sind, die auf den Scheitelpunkten (3) der V-förmigen Stanzung (2) rittlings aufliegen und quer zum Film (1) gleiten, wobei eine (12) der Klingen in Kontakt mit einem seitlichen Anschlag gleitet, um einen Scherenschnitt des Films (1) durchzuführen.
  10. Verfahren nach Anspruch 9, bei dem drei Klingen (11, 12, 13) vorgesehen sind, die in den beiden Richtungen quer zur Folie (1) laufen, wobei zwei der Klingen (11, 13) zueinander ausgerichtet sind, während die dritte Klinge (12) mit Abstand und versetzt zu ihnen in einer Zwischenposition in Bezug auf die Klingen (11, 13) angeordnet ist, sodass gemäß der Bewegungsrichtung der Klingen die vordere der beiden ausgerichteten Klingen (11, 13) den Schnitt ausführt und die andere, die ihm folgt, inaktiv bleibt, während die mit Abstand angeordnete Zwischenklinge (12) den beschnittenen Teil oder Streifen des Materials (4) in beiden Bewegungsrichtungen der Klingen schneidet, die in Kontakt mit einem seitlichen Anschlag gleiten, um einen Scherenschnitt der Folie (1) auszuführen.
EP19182913.4A 2018-06-29 2019-06-27 Verbesserte schneidevorrichtung und verfahren zum abtrennen von beuteln für flexible verpackungen aus laminierten folien Active EP3587057B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000006808A IT201800006808A1 (it) 2018-06-29 2018-06-29 Dispositivo e metodo di taglio perfezionati per la separazione di buste per imballaggi flessibili ottenute da film laminati

Publications (2)

Publication Number Publication Date
EP3587057A1 EP3587057A1 (de) 2020-01-01
EP3587057B1 true EP3587057B1 (de) 2020-10-14

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EP19182913.4A Active EP3587057B1 (de) 2018-06-29 2019-06-27 Verbesserte schneidevorrichtung und verfahren zum abtrennen von beuteln für flexible verpackungen aus laminierten folien

Country Status (2)

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EP (1) EP3587057B1 (de)
IT (1) IT201800006808A1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US9511503B2 (en) * 2013-12-19 2016-12-06 Seiko Ltd. Trimmer apparatus

Non-Patent Citations (1)

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

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IT201800006808A1 (it) 2019-12-29

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