Device for separating at least one, in particular conveyed planar element, in particular plastic sheet or plastic sheet composite material into individual elements

Abstract

To propose a device that allows perfect separation of plastic sheets or plastic sheet composite materials.SOLUTION: A device for separating at least one, in particular a conveyed planar element, in particular a plastic sheet or a plastic sheet composite material, into individual elements, comprises at least one punching tool. The punching tool has at least one punching beam 11 working toward an anvil. The punching beam is held via a stand mechanism. In the device, the punching beam and the stand mechanism are coupled to each other via a pendulum joint 20 and it is specified that a pendulum motion axis of the pendulum joint extends transverse to a longitudinal axis of the punching beam.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an apparatus for separating at least one, in particular a conveyed area-like element, in particular a plastic sheet or a plastic sheet composite, into individual elements, which comprises at least one punching tool having at least one punching beam working against an anvil, which punching beam is held via a stand mechanism.

[0002] Plastic sheets or plastic composites are used to produce packaging, for example for food, household goods, tools and the like, in which case a plastic sheet, which is, for example, rolled up, is separated into individual elements after forming the container, for example by deep drawing, filling the container and sealing the container.

[0003] For this separation operation, the above-mentioned separation device is used, which is equipped with at least one punching tool, which allows the separation of the individual elements of the plastic sheet even during rapid cycles. The punching tool operates with a high force, which is necessary to achieve a reliable separation during the crushing separation performed by punching.

[0004] The problem here is that the force on the punching tool is applied regularly and in a point-like manner, for example at one point in the center or at two points, for example at the free ends of the punching tool. The different force actions result in high forces and high forces when the punching beam and the anvil are pressed against each other. These high forces lead to a slight deflection of the tools involved in the punching. As a result of this deflection, gaps are formed between the punching tools, which leads to insufficient punching. Frequent corrections are required and the additional force consumption during punching leads to premature wear of the punching tools.

[0005] The object of the present invention is therefore to improve an apparatus of the type mentioned at the outset in such a way that a satisfactory separation of plastic sheets or plastic sheet composites is possible.

[0006] This problem is solved according to the invention in that the punched beam and the stand arrangement are connected to one another via a pendulum joint, the axis of pendulum movement of which runs transversely to the longitudinal axis of the punched beam.

[0007] In the device according to the invention, the punching beam is not held in a non-rotatable manner in the stand arrangement, but is instead supported via a pendulum joint, which allows the punching beam to pivot relative to the stand arrangement in which it is held.

[0008] The pendulum movement allows, first of all, that the punching beam can be correctly positioned against the counter anvil during punching. Furthermore, a pendulum joint provides a central suspension of the punching beam, which allows a deflection of the punching beam at its free end in the event of a greater force. If a corresponding reaction force is applied to the anvil on its outside, the anvil deflects in exactly the opposite direction. Since the force is applied on the outside, a recess is formed there. The punching beam and the anvil can be closely pressed against each other, which results in a satisfactory desired separation.

[0009] In the present invention, the axis of pendulum movement is oriented transversely to the longitudinal axis of the punching beam and thus parallel to the transport direction of the plastic sheet or plastic sheet composite material.

[0010] The stamped beam is preferably suspended on a pendulum joint, for which purpose the stand arrangement preferably has a housing for the pendulum joint.

[0011] According to one refinement of the invention, it is specified that the receiving body is a transverse support arranged above the surface element transversely to the conveying direction of the surface element. This transverse support is formed like a tie beam. The transverse support is arranged above the plastic sheet or plastic sheet composite material to be separated. For this purpose, the transverse support is held by a stand mechanism. The transverse support may be erected at each of its free ends on a corresponding stand. In this case, these stands are arranged on both sides of the surface element to be conveyed.

[0012] A further refinement of the invention specifies that the transverse support is formed from at least three shell elements, the outer shell elements being connected to the stand mechanism and the intermediate shell element supporting the punched beam and suspended on a pendulum joint. With this configuration, the transverse support is formed compactly. The three identically formed shell elements may be congruently positioned one on top of the other. In this case, both outer shell elements are connected to the stand mechanism in a position-invariant manner. The two outer shell elements hold the intermediate shell element between them via a pendulum joint, i.e. this intermediate shell element can freely pendulum between the two outer shell elements. In this case, the intermediate shell element supports the punched beam.

[0013] A further refinement of the invention provides that the intermediate shell element is mounted in a variable height in the stand arrangement. In this way, an adaptation to different punching tasks when the surface elements differ from one another can be made. The height variability is preferably ensured by an eccentrically designed part of the pendulum joint which supports the intermediate shell element. The pendulum joint is arranged in the outer shell element and can be pivotally adjusted from the outside, for example by means of a knurl on the outer edge. The eccentric part is further assigned a determining element for determining the height position of the shell element in order to determine the height of the pendulum joint for the punching task.

[0014] With regard to the variable height mounting of the pendulum joint within the stand mechanism, an alternative embodiment of the invention specifies that the pendulum joint is housed within a wedge-shaped frame, which may be moved within such a wedge-shaped frame, and by moving the wedge-shaped frame from a changed horizontal orientation, a change in the height position of the pendulum joint can be achieved.

[0015] A spindle drive is preferably assigned to the wedge-shaped frame, which is applied to the wedge-shaped frame in such a way that a change in position of the wedge-shaped frame occurs by the operation of the spindle drive. In this respect, the change in position of the wedge-shaped frame can be effected from the outside by means of a correspondingly designed spindle drive. A determination mechanism is preferably further assigned to the spindle drive in order to determine a defined position of the spindle drive and the wedge-shaped frame.

[0016] An embodiment of the invention is shown in the drawings. [Brief description of the drawings]

[0017] [Figure 1] 1 is a schematic side view of an apparatus for conveying surface elements to form containers, seal said containers and separate said containers from one another. [Diagram 2] FIG. 2 is a perspective partial view of a container to be separated. [Diagram 3] 1 is a perspective view of a device according to the invention for pressing through surface elements during a stamping process; [Figure 4] 1 is a perspective, partially cut-away view of components of the device according to the invention; FIG. [Diagram 5] FIG. 5 is a side view of the component shown in FIG. [Figure 6] FIG. 6 is a perspective, partial cross-sectional view of the components shown in FIGS. 4 and 5. [Figure 7] 1 is a perspective, partially cut-away view of an alternative embodiment of a component of an apparatus according to the present invention; [Figure 8]1 is a perspective side view of an alternative embodiment of a component of an apparatus according to the present invention; FIG. [Figure 9] 1 is a perspective, partially cut-away view of an alternative embodiment of a component of an apparatus according to the present invention;

[0018] The device shown in Fig. 1 has a machine frame 1, which comprises several work stations. Reference number 2 denotes a deep-drawing station, in which a container 5 is formed on a surface element 4, in particular a sheet strip, unwound from a roll 3. After the container 5 has been formed, the surface element 4 continues to be conveyed along arrow 6, for example filled with an object and guided to a sealing station 26, in which the container 5 is closed with a sealing sheet 7.

[0019] The container 5 is then conveyed to a cutting station 8, where it is cut parallel to the conveying direction of the surface element 4 by means of a rotating cutter 9. The cuts transverse to the conveying direction of the surface element 4 are effected by a punching device 10.

[0020] Figure 2 shows a component of the punching device 10, i.e. a punching beam 11 of the punching tool. This punching beam 11 extends over the entire width of the surface element 4. For transport, this surface element 4 is held on its longitudinal edges by chains 12. The containers 5 shown in Figure 2 can be separated from one another by the punching device 10 transversely to the transport direction (arrow 6) of the surface element 4. Punching takes place along a line 13.

[0021] In figure 3 the punching device 10 is shown during the punching process. The surface element 4 is fed to the punching device 10 along the conveying direction indicated by the arrow 6 and is pressed through. The punching beam 11 shown in figure 2 is attached to a stand arrangement 14. Furthermore, a lower punching tool 15 is also attached to this stand arrangement 14.

[0022] The stand arrangement 14 comprises a lateral support 16 standing on a stand 17. This lateral support 16 is formed from three shell elements 18, 18', 19.

[0023] Figures 4 and 5 show that shell element 19 is connected to shell elements 18, 18' via pendulum joint 20. Shell element 19 can oscillate inside both outer shell elements 18, 18' as clearly shown by double arrow 25 in Figure 5. Shell element 19 supports stamped beam 11.

[0024] 4 and 6 show that the pendulum joint 20 has an eccentric section, which allows the height of the shell element 19 to be changed relative to the shell elements 18, 18'. A disk 21 is arranged in the eccentric section of the pendulum joint 20. This disk 21 is accommodated in the intermediate shell element 19. The height adjustment can be effected via a knurled section 22. A determining element 23 corresponds to the row of holes 24. By means of the determining element 23 the pivot position of the pendulum joint 20 can be determined.

[0025] In figures 7 and 8 an alternative embodiment of the shell element 19 is shown. This shell element 19 is also connected to the shell elements 18, 18' via a pendulum joint 20, but an alternative mechanism for changing the height of the shell element 19 is formed. This alternative mechanism comprises a wedge-shaped frame 26a arranged obliquely to the horizontal. A spindle drive 27 is assigned to this frame 26a. This spindle drive 27 rests against the frame 26a. In figure 8 the shell element 19 is shown directly.

[0026] 9 shows that the spindle drive 27 is guided inside the shell element 19 outwards as far as a hand grip 28. Furthermore, a further hand grip 29 is provided, which serves to tighten the spindle drive 27.

[0027] 8 shows that the wedge-shaped frame 26a has its wedge shape inside the frame portion, that is, inside the frame 26a. By moving the frame 26a, the height of the arrangement of the shell elements 19 is changed.

Claims

1. An apparatus for separating at least one, in particular a conveyed planar element, in particular a plastic sheet or plastic sheet composite material, into individual elements, comprising at least one punching tool, the punching tool having at least one punching beam working toward an anvil, the punching beam being held via a stand mechanism, in the apparatus, The punched beam (11) and the stand mechanism (14) are connected to each other via a pendulum joint (20), and the pendulum motion axis of the pendulum joint (20) extends laterally with respect to the longitudinal axis of the punched beam (11).

2. The apparatus according to claim 1, characterized in that the punched beam (11) is suspended from the pendulum joint (20).

3. The apparatus according to claim 1 or 2, characterized in that the stand mechanism (14) has a housing for the pendulum joint (20).

4. The apparatus according to claim 3, characterized in that the housing is a lateral support (16) positioned above the planar element (4) in a direction lateral to the transport direction of the planar element (4).

5. The apparatus according to claim 4, characterized in that the lateral support (16) is formed from at least three shell elements (18, 18', 19), the outer shell elements (18, 18') are coupled to the stand mechanism (14), the intermediate shell element (19) supports the punched beam (11) and is suspended from the pendulum joint (20).

6. The apparatus according to claim 5, characterized in that the shell element (19) is mounted in a height-adjustable manner within the stand mechanism (14).

7. The apparatus according to claim 6, wherein the shell element (19) is attached to the pendulum joint (20), the pendulum joint (20) is rotatably housed within the outer shell elements (18, 18'), and the pendulum joint (20) has an eccentrically formed portion within its extending length.

8. The apparatus according to claim 7, characterized in that at least one determining element (23) for determining the height position of the shell element (19) is assigned to the eccentric portion.

9. The apparatus according to claim 6, characterized in that the pendulum joint (20) is housed within at least one wedge-shaped frame (26a).

10. The apparatus according to claim 9, characterized in that at least one spindle drive device (27) is assigned to the wedge-shaped frame (26a).

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