METHOD AND DEVICE FOR PRODUCING A PACKAGING BODY OF PACKAGING

Abstract

The present invention relates to a method for producing a packaging body (51) from a web material that comprises paper, wherein the packaging body (51) comprises an indentation (53) for receiving an item to be packaged, said method comprising the steps of: pre-tensioning the web material (14); fixing the web material (14) between a holding-down means (32) and a die (31); molding the indentation (53) in the web material (14); and removing the molded indentation (53) from the die (31).

Claims

1. A method for producing a packaging body (51) from a web material that comprises paper, wherein the packaging body (51) comprises an indentation (53) for receiving an item to be packaged, said method comprising the steps of: pre-tensioning the web material (14), fixing the web material (14) between a holding-down means (32) and a die (31), molding the indentation (53) in the web material (14) and removing the molded indentation (53) from the die (31), wherein the pre-tensioning step is carried out by clamping jaws (3a, 3b) arranged laterally on the web material and a tension roller arrangement (36) having two rollers (3c, 3d), wherein the web material (14) is passed between the two rollers (3c, 3d).

2. (canceled)

3. The method according to claim 1, wherein the clamping jaws (3a, 3b) are also used for transporting the web material (14).

4. The method according to claim 1, wherein a step of stretching the pre-tensioned web material (14) is carried out by the clamping jaws (3a, 3b) and the tension roller arrangement (36).

5-9. (canceled)

10. A device for producing a packaging body (51) having an indentation (53) for receiving an item to be packaged from a web material (14) which comprises paper, comprising: a pre-tensioning device (3) and a molding device (13) having a die (31), a holding-down device (32), a pneumatic device for generating a pneumatic molding force, and a removing device for removing the molded indentation from the die, wherein the pre-tensioning device comprises clamping jaws (3a, 3b) and a tension roller arrangement having at least two rollers (3c, 3d).

11. The device according to claim 10, wherein the molding device (13) also has a punch (33).

12. (canceled)

13. The device according to claim 10, also comprising a control unit (7) which is set up to bring the holding-down device (32) into a position in which web material (14) can be fed into the die (31) during a final molding step.

14. A packaging machine comprising a device according to claim 10.

15. The device of claim 11, wherein the punch (33) has an air duct (34).

16. The device according to claim 11, also comprising a control unit (7) which is set up to bring the holding-down means device (32) into a position in which web material (14) can be fed into the die (31) during a final molding step.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] A preferred embodiment of the invention is described in detail below with reference to the accompanying drawings, in which:

[0019] FIG. 1 shows a schematic view of a device for producing and filling packaging with a device for producing a packaging body according to a preferred embodiment of the invention,

[0020] FIG. 2 shows a schematic plan view of a pre-tensioning means of the device of FIG. 1,

[0021] FIG. 3 shows a schematic side view of the pre-tensioning device of FIG. 2 and

[0022] FIGS. 4 to 6 show schematic representations of a molding means, with various steps of the molding being shown.

DETAILED DESCRIPTION

[0023] In the following, with reference to FIGS. 1 to 6, a device 10 for producing a packaging body 51 comprising an indentation 53 for receiving an item to be packaged from a web material 14 is shown. The web material 14 comprises paper and is preferably made entirely of paper.

[0024] The device 10 is part of a packaging machine 100 which, in addition to the device 10 for producing the packaging body 51, also has a device 1 for processing a cover roll web 20 made of paper. The cover roll web 20 is a cover web of the packaging and forms a lid 52 on the finished packaging 5.

[0025] The device 1 for processing the cover roll web 20 comprises a draw-off device 2 which draws off the cover roll web from a continuous roll 22. The drawing-off is continuous. The draw-off device 2 further comprises a dancer roller arrangement 21 having three rollers 21a, 21b, 21c. The dancer roller arrangement 21 allows the cover roll web to be continuously drawn off from the roller 22; it is nevertheless possible to process of the cover roll web 20 at a standstill. Such processing can be carried out, for example, by means of a stretching device 4 in order to stretch the cover web.

[0026] The device 10 for producing the packaging body 51 comprising the indentation 53 has, like the cover web, a continuous roll 11 and a dancer roller arrangement 12 having three rollers 12a, 12b and 12c. This dancer roller arrangement 12 also allows the web material 14 to be drawn off continuously from the continuous roll 11, wherein the web material can then be stopped intermittently during the further processing of the web material 14 and various work steps can be carried out.

[0027] The device 10 for producing the packaging body 51 comprises a pre-tensioning means 3, a molding means 13, a pressure generating means for generating a pneumatic molding pressure, and a removing device for ejecting the produced packaging body 51 from the molding device.

[0028] The pre-tensioning means 3 can be seen in detail from FIGS. 2 and 3. The pre-tensioning means 3 comprises a plurality of clamping jaws 3a and 3b and a tension roller means 36 having a first roller 3c and a second roller 3d. The web material 14 is passed between the two rollers 3c and 3d. Here, the packaging body 51 is later formed on the portion in the transport direction 6 between the clamping jaws 3a and 3b and the rollers 3c and 3d.

[0029] The molding means 13 is shown in detail in FIGS. 4 to 6. The molding means comprises a die 31 and a holding-down means 32. Furthermore, the molding means 13 comprises a punch 33, with an air duct 34 passing through the punch 33, and a removing device in the form of an ejector 35.

[0030] Furthermore, a control unit 7 is provided which is set up to control the molding means 13.

[0031] As can also be seen from FIG. 1, the packaging machine 100 further comprises a filling device, indicated schematically by the arrow 16 in FIG. 1, which fills an item to be packaged into the molded indentation 53 in the packaging body 51. The filled indentation 53 is then covered by the cover web of the cover roll web 20 and sealed with the molded packaging body 51 in a sealing station 17. The sealed packaging 5 is then punched out in a separating station 18 and the packaging thus produced is transported away in the direction of the arrow 19.

[0032] The method for producing a packaging body 51 from a paper material, comprising an indentation 53 for receiving an item to be packaged, is described in detail below. The method comprises the steps of pre-tensioning the web material 14 by means of the pre-tensioning device 3, which is shown in FIGS. 2 and 3. As indicated by the drive arrows A and B of the two rollers 3c, 3d, the web material 14 can be transported through these rollers. For pre-tensioning, the web material 14 is clamped by means of the lateral clamping jaws 3a and 3b and the two rollers 3c and 3d of the tension roller means 36 are driven briefly such that the web material 14 is pre-tensioned between the pull roller device and the clamping jaws.

[0033] This is followed by a step of fixing the tensioned web material 14 between the holding-down means 32 and the die 31. As can be seen from FIG. 4, the die 31 has a hollow mold 31a which corresponds to the three-dimensional shape of the packaging body to be created later. The clamping is shown by the arrows C in FIG. 4.

[0034] The web material 14 thus pre-tensioned and clamped is molded in the next step. Here, the indentation 53 is formed in the web material 14 in two steps. In the first step, pre-molding is carried out by means of compressed air, which is supplied via the air duct 34 (arrows D). This is shown in FIG. 5. This results in a first deformation of the web material 14, which is indicated by the arrow E in FIG. 5.

[0035] In a next step, final molding is carried out by moving the punch 33 in the direction of the arrow F (see FIG. 6). The holding-down means 32, which in the pre-molding step still clamped the web material 14 between the holding-down means 32 itself and the die 31, is moved in the opposite direction in order to stop the clamping process. As a result, web material 14 can be fed into the die during the final molding step, which is indicated by the arrows G in FIG. 6.

[0036] A fine molding can then be carried out, for example for embossing fine structures or the like. For this purpose, compressed air is preferably supplied under high pressure via the air duct 34 in order to carry out the embossing step. It should be noted, however, that the embossing step is optionally provided here.

[0037] In the last step, the molded packaging body 51 still has to be removed from the die 31. For this purpose, a removing device in the form of the ejector 35 is provided, which is guided vertically upward into the hollow mold of the die and can thus eject the molded indentation from the die (arrow H in FIG. 6).

[0038] The web material 14 is then transported further, wherein the rollers of the tension roller means are able to be moved away to avoid damage to the molded indentation.

[0039] It should be noted that the further transport can also be supported by the clamping jaws 3a and 3b of the pre-tensioning device.

[0040] It should also be noted that the pre-tensioning means can also stretch the web material 14 in addition to smoothing before the actual molding step. The stretching can be carried out by means of the tension roller means and/or by means of the clamping jaws.

[0041] It should also be noted that, instead of the compressed air, a negative pressure or a vacuum can, of course, also be used to mold the web material 14. A vacuum connection can be integrated into the die 31, for example.

[0042] It should also be noted that the produced packaging body can also be removed from the mold pneumatically, for example.