DE102005003783A1 - Sheet/film tube cut-through device for vertical bag forming, filling and sealing machine, has operating unit operated for performing cut transverse to operating direction, where adjusting unit varies stroke of operation unit - Google Patents

Abstract

The device has a cutter-type separating unit with a cogging, and two props swiveling around a swiveling axis. A movable part of an operation unit (9) is connected with a clamp over a connection. The unit operates to move the clamp back and forth and to swivel the separating unit around the swiveling axis, for performing a cut-through transverse to the operating direction. An adjusting unit (5) varies the stroke of the operation unit. Independent claims are also included for the following: (1) a method for cutting through a sheet or a film tube (2) a method for operating a separation unit.

Description

The subject of the application concerns the packaging machine construction and there a device for severing a film web or a film tube, with a knife-like separating device, which on a cutting edge ( 33 ) a toothing ( 4 ) having. In this device, two knife joints are provided on the separator. Furthermore, a bracket is provided with two bracket arms, each bracket arm has a joint. In each case a strut between a knife joint and a joint is pivotable about a pivot axis. An actuator with a deflectable part which is connected to the bracket via a connection and which acts in an actuating direction, serves to move the bracket back and forth to pivot the separator about the pivot axes to the changing deflection of the Teeth transverse to the direction of actuation to be able to perform the severing. Furthermore, the application relates to a method for severing a film web or a film tube.

A Device of the type described above is known and used in a welding jaw one Cross-sealing station of a vertical bagging machine one complete Cutting a film tube. This is the film tube between sealing surfaces clamped against each other moving welding jaws and thereby by means of two transverse seams welded, wherein the one transverse seam, the top seam of a tubular bag and the another, parallel offset seam, the bottom seam of a subsequent Tubular bag forms, and wherein the film tube between them two cross seams by means of in the one welding jaw integrated separating device is severed. It serves the Toothing the cutting edge of the separator a safe intervention the cutting edge in the film tube. The actuator exercises each a same stroke. This is enough to cut through the edge the compressed one Swivel the film tube and completely close it cut.

The known device and the known method have the disadvantage that they only for a complete Cutting through the film tube or a film tube forming film web are suitable. An optional instead of a Cutting through vornehmbare perforation of the film tube by only penetration of the tips of the teeth of the teeth in the film tube can not.

It the object is to eliminate this disadvantage.

Solved is the Task according to the characterizing Part of claim 1, and according to claims 6 and 7. According to claim 1, an adjusting device is provided to the stroke of the actuator to change, to optionally with large Hub a transection or a small stroke perforation of the To achieve film tube.

The proposed innovation has the advantage that only by the function the adjusting device is specified, whether a transection or a Perforation of the film tube is done. While at a relatively big hub the cutting edge penetrates the film tube, it comes with a relatively small stroke only to the fact that only the teeth of the cutting edge, completely or partially penetrates into the film tube and so this only perforated.

The Adjustment can be realized in a variety of ways become. It can electromotive the deflectable part of the actuator or pneumatically control. If a pneumatic cylinder as an actuator its deflectable part can optionally against an anvil be set or not. Here can z. B. the anvil the actual Be adjusting.

The Operation of the device can by programming a machine control or a control of the device can be arbitrarily specified (claim 2). Thus, alternately generating different strokes (claim 3) or for provided a certain operating time generating each same strokes become. A compact and meaningful technique is achieved when the device in a welding jaw a transverse sealing station of a vertical bagging machine is integrated (claim 5). An inexpensive version is achieved when a Pneumatic cylinder as actuator is used, the stroke is limited by means of an anvil (Claim 4).

you a toothed separating device can optionally be cut or to perforate a foil when it is swiveling. Is according to claim 6 a separating device against the film (film web or tube) set to penetrate only with the teeth in this, the Separator performs no Schwenkbewe supply, so is a perforation generated. Leads However, the separator while doing a pivoting movement, it is a film cut made.

at this method it is possible that the separator after each separation process or perforation remains in a certain, reached pivot position to off this one out the next Start process, or that the separator each one so Operation is subsequently pivoted to the next operation from another To start the swivel position (Claim 8).

The proposed method is suitable for implementation in a welding jaw a Vertical bagging machine (claim 7).

in the The following will illustrate the invention with reference to exemplary embodiments Figures described in more detail. It shows:

1 in a side view of a vertical bagging machine, in the transverse sealing station two mutually movable welding jaws are provided for producing transverse seams on a film tube, wherein a separating device is used on a welding jaw for alternately severing and perforating the film tube;

2 in a side view with a partial section of the transverse sealing station of 1 ;

3 in a side view of two interconnected via a perforation tubular bag, which of the tubular bag machine of 1 getting produced;

4 in a view from above the separator of the transverse sealing station of 1 ,

5 in a view from above with partial horizontal section of a pivotable, toothed separating device in a welding jaw a transverse sealing station of a vertical tubular bag machine, wherein the welding jaws are open, and wherein three different positions for the separator are shown, which are traversed upon pivoting of the separator;

6 in a view from above with partial horizontal section the subject of 5 but with the welding jaws closed, wherein an anvil / stamping system of a mechanism for generating a pivoting movement of the separating device was not activated to produce a perforation;

7 in a view from above with partial horizontal section the subject of 6 but with swiveled separator to perform a complete transection of the compressed between the welding jaws film tube, the punch was placed against the anvil, and

8th in a view from above a separator with a sawtooth profile as a toothing.

For a vertical bagger 3 becomes a foil web 14 by means of a deduction 15 from a supply roll 16 unwound and over a form shoulder 17 drawn ( 1 ). At the form shoulder 17 becomes the film web 14 to a film tube 7 formed, which by means of a longitudinal sealing device 18 parallel to its transport direction 19 creating a longitudinal seam 26 is welded. The lower end of the film tube 7 is through a filling tube 20 filled. A transverse sealing station 2 ( 2 ) is used to weld the film tube 7 transverse to the transport direction 19 , It has two mutually movable welding jaws 1 . 6 on.

At every welding jaw 1 . 6 are two sealing surfaces 21 . 22 intended. The upper sealing surfaces 21 produce bottom-side transverse seams 10 and the lower sealing surfaces 22 head-side cross seams 10 of tubular bags 12 , Between the sealing surfaces 21 . 22 a welding jaw 1 is a separating device designed as a separating knife 11 provided to the between the sealing surfaces 21 . 22 the welding jaws 1 . 6 compressed and thus by means of two transverse seams 10 welded foil tube 7 between these cross seams 10 along a line of action 8th the separator 11 cut or perforate. Here are jewe ⁱ ls two filled tubular bag 12 from the film tube 7 separated ( 1 ). Between these two tubular bags 12 is a perforation 8th provided so that a customer later the two tubular bag 12 can easily separate from each other. Both the complete cutting of the film tube 7 as well as its perforation is by a in a welding jaw 1 the transverse sealing station 2 the vertical bagging machine 3 integrated device 36 executed. The device 36 leads with the toothed separator 11 alternately a cut through and a perforation.

The tubular bag 12 each have a longitudinal seam 26 , a head-side cross seam 10 and a bottom transverse seam 10 on ( 3 ).

The device 36 for cutting and perforating the film tube 7 is with the knife-like separator 11 , which at a cutting edge 33 a toothing 4 has two knife joints 30 at the separator 11 and a hanger 25 with two bracket arms 35 Mistake. there has each bail arm 35 a joint 28 up and it's each a strut 34 between a knife joint 30 and a joint 28 provided, with each of the two struts 28 around a pivot axis 29 is pivotable. An actuating device 9 with a deflectable part 31 is with the strap 25 over a connection 32 connected, which in an actuating direction 23 acts to the temple 25 to move back and forth, and around the separator 11 around the swivel axes 29 to pan. Such can be with changing deflection 13 the teeth 4 transverse to the direction of actuation 23 optionally the severing or perforating be exercised. An electrical adjustment device 5 is intended to the stroke of the actuator 9 alternately to change, with a smaller stroke only a perforation 8th and at a larger stroke complete transection of the film tube 7 to reach.

In the embodiment of 5 to 7 is the device 36 also in a welding jaw 1 a transverse sealing station 2 a vertical flow wrapper 3 integrated. As an actuating device 9 a pneumatic cylinder is provided. A stamp 37 is with a deflectable part 31 the actuator 9 connected. An anvil 38 is intended to stroke the stamp 37 to limit. The adjusting device 5 is a screw connection and designed to hold the anvil 38 relative to the stamp 37 to move.

The knife-like swiveling, a serration 4 having separating device 11 is against the deformed film web 14 or the film tube 7 set to with the teeth 4 to penetrate this or these ( 6 ). Is doing by the separator 11 no pivoting movement is carried out ( 6 ), it just becomes a perforation 8th generated. On the other hand leads the separator 11 a pivoting movement from ( 7 ), a film cut is made. It is alternately executed a perforation and a transection. After each film separation ( 7 ) becomes the separator 11 back to the previous position ( 6 ), in which a subsequent perforation is to take place.

is a sawtooth profile provided as a toothing, so can by a pivoting movement in the direction the teeth tips are made a perforation and by a Pivoting movement a cutting of the film can be achieved, respectively, if necessary with a corresponding swivel angle and corresponding deflection of the Separating device (claim 8).

In another embodiment ( 8th ) decides the pivoting direction of the separator 11 about whether one between two welding jaws 1 . 6 clamped film tube 7 perforated or severed. In one in a welding jaw 1 integrated separator 11 is a serration designed as a sawtooth 4 provided in two opposite directions 41 . 42 around an axis 40 to be moved pivotally. For the purpose of perforating a film is a pivoting movement in one direction 41 into which peaks 43 the teeth 4 point. Alternatively, for the purpose of a transection of the film is a pivoting movement in the opposite direction 42 , When perforating the tips of the sawtooth profile are only pivoted into the film, but not in a larger swing angle through the film tube 7 through, so that no complete film separation takes place. When cutting by means of opposite pivoting movement of the swing angle, however, is so large that the clamped film tube is completely severed.

It is not necessary, the separator 11 around a recess on the axle 40 to pan. Instead, a pivot mechanism of the previous embodiments could apply.

1

welding jaw

2

Cross-sealing station

3

Fill and seal machine

4

Perforation

5

adjustment

6

opposite welding jaw

7

film tube

8th

perforation

G

actuator

10

cross seam

11

separator

12

tubular bag

13

deflection

14

sheet

15

deduction

16

supply roll

17

forming shoulder

18

Longitudinal sealing device

19

transport direction

20

filling pipe

21 22

sealing surface

23

operating direction

24

joint

25

hanger

26

longitudinal seam

27

edge

28

joint

29

swivel axis

30

diameter joint

31

deflectable part

32

connection

33

cutting edge

34

strut

35

bail arm

36

contraption

37

stamp

38

anvil

40

axis

41

direction

42

opposite direction

43

sharpen

Claims (9)

Contraption ( 36 ) for severing a film web ( 14 ) or a film tube ( 7 ), with a knife-like separating device ( 11 ), which on a cutting edge ( 33 ) a toothing ( 4 ), two knife joints ( 30 ) on the separating device ( 11 ), a bracket ( 25 ) with two bracket arms ( 35 ), each arm ( 35 ) a joint ( 28 ), one strut each ( 34 ) between a knife joint ( 30 ) and a joint ( 28 ), each of the two struts ( 28 ) about a pivot axis ( 29 ) is pivotable, and an actuating device ( 9 ) with a deflectable part ( 31 ), which with the bracket ( 25 ) via a connection ( 32 ), and which in an actuating direction ( 23 ) acts around the bracket ( 25 ) and to move the separator ( 11 ) about the pivot axes ( 29 ) and with changing deflection ( 13 ) of toothing ( 4 ) transverse to the actuating direction ( 23 ) to be able to perform the severing, characterized in that an adjusting device ( 5 ) is intended to control the stroke of the actuator ( 9 ) to change. Apparatus according to claim 1, characterized in that the adjusting device ( 5 ) is freely programmable. Device according to claim 1 or claim 2, characterized in that the adjusting device ( 5 ) is provided for alternately generating a small stroke and a large stroke. Device according to claim 1, claim 2 or claim 3, characterized in that as actuator ( 9 ) a pneumatic cylinder is provided that a stamp ( 37 ) with a deflectable part ( 31 ) of the actuating device ( 9 ) that an anvil ( 38 ) is provided, the stroke of the punch ( 37 ) and that the adjustment device ( 5 ) is adapted to the anvil ( 38 ) relative to the stamp ( 37 ) to move. Device according to one of claims 1 to 4, characterized in that the device ( 36 ) in a welding jaw ( 1 ) a transverse sealing station ( 2 ) of a vertical bagging machine ( 3 ) is integrated. Method for cutting through a film web ( 14 ) or a film tube ( 7 ), in which a knife-like, swiveling, a toothing ( 4 ) having separating device ( 11 ) against the film web ( 14 ) or the film tube ( 7 ) is set to with the toothing ( 4 ) penetrate into this or these, characterized in that optionally either the separating device ( 11 ) performs no pivoting movement to a perforation ( 8th ) or the separating device ( 11 ) performs a pivotal movement to make a film severance. Method using a device according to claims 1 and 5, characterized in that two welding jaws ( 1 . 6 ) are set against each other, wherein in one of the welding jaws ( 1 ) the separating device ( 11 ) is provided, and this either performs no pivotal movement, so that a perforation ( 8th ) in one between sealing surfaces ( 21 ) of the welding jaws ( 1 . 6 ) clamped film tube ( 7 ) is produced to the film tube ( 7 ) to sever. A method according to claim 7, characterized in that after each one foil slitting the separating device ( 11 ) is kept in this position or pivoted to another position in which a subsequent perforation is to take place, and that after a successful generation of a perforation ( 8th ) the separating device ( 11 ) is left in this position or is pivoted to make a subsequent film severance from the position thereby achieved by a subsequent pivoting movement. Method for operating a separating device ( 11 ), preferably one in a welding jaw ( 1 ) integrated separating device ( 11 ), characterized in that executed as a sawtooth toothing ( 4 ), which in two opposite directions ( 41 . 42 ), preferably about an axis ( 40 ) is pivotable, movable, wherein optionally for the purpose of perforating a film pivotal movement in one direction ( 41 ) into which peaks ( 43 ) of toothing ( 4 ), and for the purpose of a transection of the film, a pivoting movement in the opposite direction ( 42 ) he follows.