DE102006010139A1 - Tubular bag machine for producing bag e.g. beverage bag, has edges welding devices including sealing surfaces, of which one sealing surface which is provided for head seam is outlined - Google Patents

Abstract

The machine has a guide roller (4) for supplying even sheets, and a foil outlet (6) for transporting the sheets. A filling pipe is provided for receiving the sheets transformed to a foil tube (8). Edges welding devices have sealing surfaces, of which one sealing surface which is provided for a head seam is outlined. A die is provided at the edges welding devices for the head seam for separation of foils, which exceeds the outlined head seam.

Description

Of the The subject of the application relates to packaging machine construction and there a vertical tubular bag machine for producing bags, those with a flowable, in particular a liquid Product, e.g. B. a mineral water are filled.

Bagmakers are well known. On them a film tube is filled and transversely by means of jaws welded to its transport direction. For the purpose of stabilizing the These bags are also additional perpendicular to the transverse seams by means of Edge welding equipment welded at the edge.

From the EP 1 106 508 B1 is known a tubular bag machine according to the preamble of claim 1. In this tubular bag machine with a film web, a supply roll, at least one deflection roller for feeding the flat film web to a forming shoulder and a film take-off for transporting the film web is a filling tube for receiving the converted into a film tube film web. The film edges of the film web lie on each other. A longitudinal welding device is provided for welding the film edges. Two mutually movable jaws of a transverse welding device are used to produce transverse seams. A separator is provided for severing the film tube. Spreading elements are used for deflecting the film tube. In this case, the spreading elements are arranged downstream of the filling tube, on opposite sides of the filling tube, respectively, an edge welding device is provided which acts against at least one tube edge deflected by a spreading element in order to produce a top seam and a bottom seam therein. Two gusset generators act from opposite sides of the stuffing tube into the film tube to create two gussets therein. The finished bags have a relatively large depth due to their gussets.

From the DE 101 31 902 A1 a similar vertical bagging machine is known. In this, a single edge welding device is provided to produce a contoured top seam. By means of a punch, the film extending beyond this top seam is cut off so that bags with a spout for pouring out the contents of the bag are formed.

The known tubular bag machines have the disadvantage that bag with a very stable bottom and a head-side spout not can be generated.

It the object is to eliminate this disadvantage.

Solved is the Task according to the characterizing Part of claim 1. Thereafter, two edge welding devices provided, each having a sealing surface. Of which is at least the for Contoured the sealing seam provided in the top seam.

The proposed tubular bag machine has the advantage that safe lofted Bag with head-side grommet can be produced. The for the Ground seam used edge welder ensures for one welded Bottom area of the bag, which serves a good stamina. The contoured sealing surface the other edge welder is for welding a head-side grommet intended. Optionally, a separator separates the excess film from the spout from. Such will certainly be stable beverage bag reached.

Further, advantageous embodiments of the proposed innovation will be in the claims 2 to 6 described.

is at the edge welder for the top seam a punch for separating foil, which over the contoured top seam goes out (claim 2), it can during or after an edge welding, in the two mutually movable jaws of the edge welding device act against the hose deflected there, the punching according to Art a Trennmessernutzung in baking a transverse welding device respectively.

Point contoured both edge sealers sealing surfaces on, so can beverage bag formed with contoured and thus very stable bottom seam become.

If, in accordance with claim 3, the sealing surfaces are contoured by both edge-welding devices, and if the sealing surface for producing the bottom seam has a widening at both of its ends in order to produce widened bottom seams on the transverse seams, the bag stability is thereby substantially improved. The widened floor seam joints connect the bottom seam over a relatively large height with the transverse seams of the film tube occurring as stabilizing side seams on the bag. This strong connection between the verschweiß th bottom portion of the bag and the two side seams of the bag gives the bag overall very good stability, so that even at lower film thicknesses, which means a material and thus cost savings, very stable, filled beverage bags with relatively high height can be produced. It can be in kosteni ger way a relatively narrow bottom seam are produced, which requires little film. Particularly good stabilities are achieved in a cost effective manner with a ratio of broadening height to ground seam height of 3: 1 to 2: 1.

A Grommet in a particularly wide trained head seam area is achieved if according to claim 4 an asymmetrical shoulder with a collar part and a longer is provided as the collar part trained chest part. there a relatively high fin is achieved at the later head area, making a long spout receives. The longitudinal welding device produces the straight middle part of the top seam, so that the subsequent welding of the Head seam by use of the corresponding, contoured sealing surface of the Edge welding device for generating the top seam could reweld this central area, if two spread-out foil areas in the edge welding device run read. This double welding at the same place would become one lead to particularly high density of the central area. there could the central region can be made relatively narrow in a foil-saving manner.

acts the edge welder for producing the bottom seam in two in each case by a spreading element deflected tube edges in order to produce a bottom seam in each tube edge (claim 5), two are each extending between the transverse seams bottom seams formed by a single edge welding device.

bag with a particularly big one Filling volume produced at relatively low film consumption, if according to claim 6 the edge welder for generating the top seam only in one of a spreader deflected Hose rim acts, and the longitudinal sealing device acts against this fin-like tube edge to a head-side longitudinal seam as a straight area on the bag to produce as upper Tüllenabschluss. Such bags are also very close to their Tüllenabschlusses.

in the Following is the proposed innovation on hand an embodiment illustrative figures closer described. It shows:

1 in a side view of a tubular bag machine for the production of beverage bags, with an asymmetric forming shoulder for forming a flat film web to a film tube with a Tüllenbereich, a filling tube, two successively arranged spreading elements per tube side, closed jaws of a transverse welding device, directed against the deflected (squeezed hose edges , contoured edge sealers, as well as a separate longitudinal welding device;

2 in a perspective view of a produced beverage bag with bottom seam and head-side spout;

3 in a side view the bag of 2 ;

4 in a plan view of one of two mutually movable jaws of the edge sealing device for generating the bottom seam in two spread-out film tube areas;

5 in a plan view of one of two mutually movable jaws of the edge welding device for generating the top seam in a single, spread-out film tube portion, as well

6 in a horizontal section directly above the spreading the filling tube with the four spreading elements and the film tube, which forms a fin.

In a tubular bag machine 1 becomes a foil web 2 from a supply roll 3 deducted. A pulley 4 serves for feeding the flat foil web 2 to a form shoulder 5 , A film print 6 is for transporting the film web 2 and a stuffing tube 7 for receiving the to a film tube 8th formed film web 2 intended. With the film tube 8th are the film edges 17 the film web 2 each other. A longitudinal welding device 18 serves to weld the film edges 17 , two mutually movable jaws 9 a transverse welding device 10 for producing transverse seams 11 and a separation device 12 for cutting the film tube 8th , Four spreading elements 14 (two left and two right) are for deflecting the film tube 8th provided, wherein in the film transport direction the spreading elements 14 downstream, on opposite sides of the filling tube 6 one edge welding device each 15 . 25 is provided, and wherein the left against two of two spreading elements 14 deflected tube edges 16 works to get in those two bottom seams 21 to create. Two gussets 26 coming from opposite sides of the filling tube 6 in the film tube 8th act, are used to two gussets 33 to produce in this. On the right is one of a single expansion element 14 deflected hose edge 16 from the edge welder 25 with a profiled head seam 19 Mistake. Furthermore, the right seam becomes the longitudinal seam 20 from one with the filling tube 7 connected spreading elements 14 deflected. The longitudinal seam 20 is subsequently by means of an edge welder, not graphically darge represents is, in a conventional manner by means of non-contoured welding jaws of a third edge sealer in their later bag 13 to be recognized alignment additionally with a side wall 40 of the bag 13 welded. Instead of an edge welder 15 left there could also be two Kantenschweißeinrichtungen for the respective welding only one tube edge 16 be provided. This would reduce the time required to create a bottom seam 21 shorten significantly. The edge welders 15 . 25 each have a sealing area 24 . 27 on, which are contoured. This will both the bottom seam 21 as well as the top seam 19 contoured.

The middle area 41 the top seam 19 is just. The left and right to the middle area 41 subsequent areas of the top seam 19 limit a product delivery channel 36 , The spout thus formed 23 is in the fin 22 formed as unwelded area and is used after removal of the central area 41 for pouring one in the bag 13 contained drink.

At the edge welder 25 for the top seam 19 is a punch 29 for separating film, over the contoured top seam 19 goes, provided. The punched-out foil areas are sucked off.

Every sealed area 27 for creating a bottom seam 21 has a broadening 38 at its two ends, so as to have four widened floor joints 39 at the cross seams 11 to create. These widenings are for bag stability.

An asymmetric shape shoulder 5 with a collar part 35 and one longer than the collar part 35 trained chest part 34 is intended to the fin 22 to create. The at the fin 22 provided edge sealer 25 serves to generate the contoured top seam 19 , It only works in one of a spreading element 14 deflected hose edge 16 one. The longitudinal sealing device 18 acts against a neighboring tube edge 16 to a head-side longitudinal seam 20 on the bag 13 to generate a side wall 40 with the head seam 19 combines.

1

Fill and seal machine

2

sheet

3

supply roll

4

idler pulley

5

forming shoulder

6

film take-off

7

filling pipe

8th

film tube

9

jaw

10

Transverse welding device

11

cross seam

12

separator

13

bag

14

spreader

15

Edge welding device

16

hose edge

17

film edge

18

Longitudinal welding device

19

head seam

20

longitudinal seam

21

bottom seam

22

fin

23

spout

24

Sealing surface on the head side

25

Edge welding device

26

Gusseted producer

27

Sealing surface on the bottom side

28

slot

29

punch

33

gusset

34

breast part

35

collar part

36

Product delivery channel

37

foil retainer

38

widening

39

widened Bottom seam

40

Side wall

41

middle Area of the top seam

Claims (6)

Flow wrap machine ( 1 ) with a film web ( 2 ), a supply roll ( 3 ), at least one deflection roller ( 4 ) for feeding the flat film web ( 2 ) to a form shoulder ( 5 ), a slide ( 6 ) for transporting the film web ( 2 ), a filling tube ( 7 ) for receiving the to a film tube ( 8th ) formed film web ( 2 ), where the film edges ( 17 ) of the film web ( 2 ) lie on one another, a longitudinal welding device ( 18 ) for welding the film edges ( 17 ), two mutually movable jaws ( 9 ) a transverse welding device ( 10 ) for producing transverse seams ( 11 ), a separating device ( 12 ) for cutting the film tube ( 8th ), with spreading elements ( 14 ) for deflecting the film tube ( 8th ), wherein in the film transport direction the spreading elements ( 14 ), on opposite sides of the filling tube ( 6 ) an edge welding device ( 15 . 25 ) is provided, which against at least one of a spreading element ( 14 ) deflected hose edge ( 16 ) acts around in this a top seam ( 19 ) and a bottom seam ( 21 ) and with two gussets ( 26 ) from opposite sides of the filling tube ( 6 ) in the film tube ( 8th ) to form two gussets ( 33 ) in this, characterized in that the edge welding devices ( 15 . 25 ) one sealing surface each ( 24 . 27 ), from de at least those for the top seam ( 19 ) provided sealing surface ( 24 . 27 ) is contoured. Tubular bag machine according to claim 1, characterized in that on the edge welding device ( 25 ) for the top seam ( 19 ) a punch ( 29 ) for separating film, which via the contoured top seam ( 19 ) goes out. Tubular bag machine according to claim 1 or claim 2, characterized in that both sealing surfaces ( 24 . 27 ) are contoured, and that the sealing surface ( 27 ) for creating the bottom seam ( 21 ) each a widening ( 38 ) at its two ends in order to widened bottom seams ( 39 ) at the transverse seams ( 11 ) to create. Tubular bag machine according to at least one of claims 1 to 3, characterized in that an asymmetrical forming shoulder ( 5 ) with a collar part ( 35 ) and one longer than the collar part ( 35 ) trained chest part ( 34 ) is provided. Tubular bag machine according to at least one of claims 1 to 4, characterized in that the edge welding device ( 15 ) for creating the bottom seam ( 21 ) in two in each case by a spreading element ( 14 ) deflected tube edges ( 16 ) acts in each hose edge ( 16 ) a bottom seam ( 21 ) to create. Tubular bag machine according to at least one of claims 1 to 5, characterized in that the edge welding device ( 25 ) for generating the top seam ( 19 ) only in one of a spreading element ( 14 ) deflected hose edge ( 16 ), and that the longitudinal sealing device ( 18 ) against this hose edge ( 16 ) acts to a head-side longitudinal seam ( 20 ) on the bag ( 13 ) having a straight central area ( 41 ) of the contoured top seam ( 19 ).