Device and method for cutting a strip made of a deformable material
Patent Information
- Application Number
- EP2023800372
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-11-16
- Filing Date
- 2023-10-30
- Publication Date
- 2025-09-24
AI Technical Summary
Current cutting devices for deformable materials, such as semi-finished tires, struggle to efficiently cut strips obliquely with the transport direction without deforming the material, leading to increased waste and complexity in storage and processing, especially for orientations shown in FIGS. 1B and 1D.
A cutting device with a transport device that adjusts the relative position of its edges to prevent the uncut strip from hitting the recess during cutting, allowing the strip to be cut obliquely with the transport direction without deformation, using mechanisms like hydraulic actuators or rotating support surfaces to ensure the strip is properly aligned for storage.
Enables easy deposition of cut strips in previously challenging orientations without additional system components, reducing material waste and processing complexity while maintaining a compact structure, allowing for efficient further processing and storage.
Smart Images
Figure 1.1
Abstract
Description
[0001] Description
[0002] Device and method for cutting a strip of deformable material
[0003] The present invention relates to a device and a method for cutting a strip of deformable material, in particular a semi-finished tire.
[0004] In today's production, it is common to produce a variety of deformable materials in strip form, e.g., by pressing, extruding, or similar processes. Production often takes place in the form of continuous strips, meaning the strip is initially produced without interruption. One example of this type of production is the manufacture of semi-finished tire products, such as treads or side strips for tires, especially automotive tires, using an extruder.
[0005] For portioning and further processing, such a strip of deformable material must be cut. It is often technically necessary for the cut to run diagonally through the material, especially if the cut surface is to serve as a joining point for the cut strip, as this increases the joining surface area. In tire production in particular, the cut tire semi-finished product is formed into cylinders by gluing the two cut surfaces of the semi-finished product together. The diagonal cut surface facilitates better adhesion of the cut surfaces due to its larger surface area compared to a vertical cut.
[0006] The material strips often have different structures on both sides. For example, a tread semi-finished product for a car tire has a profile surface on one side where the tire tread is formed, while the other side is designed to connect to the inner tire layers. Since there are two possible ways of aligning the cut surface—cutting against or in line with the transport direction—and since the different surfaces of the strip result in a difference between the two positions of the strip, there are essentially four ways of depositing finished cut material strips in the case described above. These are shown in Figs. 1A to 1D.
[0007] Figure 1A shows the case where a strip 20 has been cut diagonally against the transport direction x. An upper side 22 (e.g., a profile side) faces upward. The strip rests on its underside 24. Viewed in the transport direction x, the upper side 22 thus extends further forward than the underside 24.
[0008] Figure 1B shows the case where the strip 20 was cut diagonally in the transport direction x. The top side 22 is again facing upward, and the strip 20 rests on its underside 24. However, viewed in the transport direction x, the underside 24 now extends further forward than the top side 22.
[0009] In Figs. 1 C and 1 D, the strip 20 is cut as in Figs. 1 A and 1 B, but is then turned along its longitudinal axis before being laid down, ie the underside 24 points upwards and the top side 22 points downwards.
[0010] A simple technical implementation of these four storage options currently only exists for the cases shown in Figs. 1A and 1C, i.e., for a cut diagonally against the transport direction. The reason for this is that a cut in the transport direction creates a point on the underside of the material strip at the front. This point can be deformed, particularly shortly after the cut, by impacting the conveyor mechanism in the cutting device, which can render the material strip unusable or increase the amount of material waste.
[0011] On the other hand, it can be advantageous for optimizing further processing of the cut strips if they are deposited as shown in Figs. 1 B and 1 D. Currently, however, this is only possible with great effort. It is possible to redirect the cut material strips by 180° before depositing them. However, this is technically relatively complex and cost-intensive. It also increases the space required by the system. Alternatively, it is also possible to rotate the deposit station, such as a book carriage in the production of semi-finished tires, by 180°. However, this also increases the complexity, costs, and often also the space required by the system.
[0012] The object of the present invention is therefore to provide a device and a method for cutting a strip of deformable material that can solve the above-mentioned problems. In particular, the storage positions shown in Figs. 1B and 1D are also to be made possible by cutting the strip in the transport direction without deforming it.
[0013] This problem is solved by the subject matter of the independent claims.
[0014] A cutting device for cutting a strip of deformable material comprises a transport device for transporting the strip lying on the transport device through the cutting device along a transport direction, and a cutting device for cutting the strip by means of a cutting blade along a cutting surface that runs obliquely from top to bottom in the transport direction through the strip lying on the transport device. In this case, the transport device has a recess in the region of the cutting device for receiving the cutting blade when cutting the strip, wherein a start of the recess defines a first edge, viewed in the transport direction, and an end of the recess defines a second edge, viewed in the transport direction.The transport device is suitable for raising the first edge relative to the second edge after the strip has been cut until a tip of the uncut part of the strip has been transported by the transport device over the second edge.
[0015] The cutting device is therefore basically constructed in a known manner. A transport device, e.g. a conveyor belt or a roller belt, transports a, in particular endless, strip of material to a cutting device in which a cutting knife, e.g. a rotating cutting blade, a laser or an ultrasonic knife, successively cuts off the front part of the material strip. During the cutting process, the cutting knife enters a recess in the transport device, which can be designed as a groove or channel running transversely to the transport direction. The recess forms a first edge at its beginning and a second edge at its end in the surface of the transport device. In order to position the part of the strip that has not been cut off for further portioning, it must be pushed over the recess.
[0016] In contrast to conventional systems, however, the cutting blade of the cutting device is arranged in such a way that it creates a cutting surface that runs diagonally downwards from the top in the transport direction. The side of the uncut part of the strip resting on the transport device is located further forward in the transport direction than the top of the strip.
[0017] If this non-severed part is now pushed over the recess of the cutting device, there is a risk that it will hit the second edge of the recess because the deformable material of the strip can sink into the recess and thus lie lower than the surface of the transport device adjacent to the recess in the transport direction. To solve this problem, the first edge can be raised relative to the second edge, or the second edge lowered relative to the first edge. This ensures that the pushed-forward tip of the strip does not hit the walls of the recess, but reaches the top side of the transport device adjacent to the recess without deformation. Once the tip has been brought over the second edge, the relative position of the first and second edges can be adjusted again in order to create identical starting conditions for the next cut.
[0018] In this case, the transport device can be suitable for raising a first support surface of the strip in the area in front of the first edge and / or lowering a second support surface of the strip in the area after the second edge. The change in the relative position thus occurs by changing the height position of the support surfaces in front of and / or behind the recess. For example, the transport device can be split in two by the recess in the area of the cutting device, so that the height of the transport device in front of and behind the recess can be changed independently of each other. The height change can be caused, for example, by hydraulic actuators or electric motors.
[0019] The transport device can be suitable for raising the first support surface or lowering the second support surface through linear, vertical movements of the support surfaces. For example, hydraulic actuators can move the first support surface upwards or the second support surface downwards (or both).
[0020] The transport device can, however, also have an axis running horizontally and perpendicular to the transport direction and be suitable for rotating the support surface of the strip in the region of the recess around the axis in the transport direction in such a way that the first edge is raised relative to the second edge. The transport device then has, for example, a block in the region of the cutting device which is rotatably mounted on the axis and on the upper side of which the support surfaces and the recess are formed. If this block is rotated in the transport direction from a position in which the support surfaces are at the same height, the second edge drops more than the first edge. This simply prevents the pushed-in strip from hitting the walls of the recess. In addition, the rotating movement in the transport direction supports the further transport of the part of the strip that has not been cut off.
[0021] The strip of deformable material can, in particular, be a semi-finished tire product, e.g., a tread or a side strip. This allows the above-mentioned advantages to be utilized for tire production. An extrusion device for producing a strip-shaped rubber extrudate, in particular semi-finished tire products, has at least one extruder for producing the strip-shaped rubber extrudate, a cutting device for cutting the strip-shaped rubber extrudate, as described above, a material feed for feeding starting materials for producing the rubber extrudate to the extruder, and a depository for depositing portions of the strip-shaped rubber extrudate cut off in the cutting device. The extruder, the cutting device, and the depository are connected by a conveyor line, and the material feed and the depository are arranged on the same side of the conveyor line.
[0022] The extrusion device thus has a typical design. However, the use of the cutting device described above allows the extrudates to be deposited in the storage area, such as a book carriage, with an orientation as shown in Fig. 1B, while maintaining the known, relatively compact design of the extrusion device without having to add additional system components.
[0023] The extrusion device can further comprise a turning device suitable for turning the parts cut off in the cutting device around their longitudinal axis before they are deposited in the storage unit. Thus, by using the known turning device and the cutting device according to the invention, the extrusion device can also deposit extrudates with the orientation shown in Fig. 1D.
[0024] A method for cutting a strip of deformable material by means of a cutting device as described above comprises: transporting the strip lying on the transport device through the cutting device along a transport direction; cutting the strip by means of the cutting blade along a cutting surface which runs obliquely from top to bottom in the transport direction through the strip lying on the transport device; and lifting the first edge after cutting the strip relative to the second edge until a tip of the uncut part of the strip has been transported by the transport device over the second edge.
[0025] This process allows the production of material strips with cut edges, which allow the material strips to be easily laid down in orientations that could previously only be achieved with comparatively large equipment expenditure.
[0026] The present invention is further explained below with reference to the figures. This description is to be understood as merely exemplary and is not intended to limit the claimed subject matter. The invention is defined solely by the subject matter of the independent claims. They show:
[0027] Fig. 1A to 1D schematic representations of different
[0028] Storage options for diagonally cut strips of material;
[0029] Figs. 2A and 2B are schematic representations of a cutting device;
[0030] Figs. 3A and 3B are schematic representations of another cutting device;
[0031] Figs. 4A and 4B are schematic representations of another cutting device;
[0032] Fig. 5 is a schematic representation of an extrusion device; and
[0033] Fig. 6 is a flow chart of a method for cutting deformable material.
[0034] 2A and 2B schematically show a cutting device 100 for cutting a strip 200 of deformable material. The strip 200 can originate from any source and consist of any deformable material. Preferably, however, it is an extrudate of rubber or caoutchouc, more preferably a semi-finished tire product, such as a tread or a side strip. Furthermore, the strip 200 is preferably a continuous product that is cut into pieces of a desired length in the cutting device 100. However, the cutting device 100 can also be used to cut strips of material with a finite length.
[0035] The cutting device 100 has a transport device 110 and a cutting device 120.
[0036] The transport device 110 serves to transport the strip lying on the transport device 110 through the cutting device 100 along a transport direction x. For this purpose, the transport device 100 has any known transport mechanisms, such as conveyor belts, roller conveyors, and the like. Conveyor belts 119 are shown purely by way of example in Figs. 2A and 2B, which convey the material strip 200 toward and away from the cutting device 120.
[0037] The cutting device 120 has a cutting blade 122 with which the front part of the material strip 200 can be severed. For this purpose, the cutting blade 122 can be guided through the strip 200 from above in the plane of its cutting blade. The cutting blade 122 can, for example, be provided with an electrically operated, rotating cutting blade. However, other, known configurations are also possible in principle.
[0038] The term "cutting blade" is not intended to only include designs in which the material strip 200 is mechanically severed. A cutting blade can also be formed in this sense by a device for cutting by means of a laser or ultrasound. The decisive factor here is that the cut creates a surface that allows a subsequent joining process, e.g. by rolling up the cut strips and gluing the front and rear cut surfaces during tire production. As shown in Fig. 2A, the cutting blade 122 penetrates the strip 200 from behind in the transport direction x and cuts through it diagonally towards the front. This creates a cut surface 210 that runs diagonally from top to bottom in the transport direction x through the strip 200 lying on the transport device 110. The non-severed part 230 of the strip 200 therefore has on its underside, ieon the side lying on the transport device 110 has a tip 220.
[0039] In order to achieve a complete severance of the strip 200 without damaging the transport device 110, the latter has a recess 112 in the region of the cutting device 120, which can accommodate the cutting blade 122 when cutting the strip 200. The recess 112 runs transversely to the transport direction x through the transport device 110 to enable the strip 200 to be severed across its full width. As shown in Fig. 2A, the recess 112 can have a cross-sectional contour that is adapted to the inclination of the cutting blade 122. In principle, however, the recess 112 can have any desired shape, as long as it is ensured that the strip 200 can be cut without damaging the transport device 110.
[0040] Furthermore, the cutting blade 122 can also cut through the strip 200 from below, from the recess 112. The cutting blade can then retract back into the recess 112 after the cut. In a non-mechanical cut, e.g., using a laser or ultrasound, the cut can begin from below or above, with the energy source generating the laser or ultrasound being switched off after the cut.
[0041] As shown in Figs. 2A and 2B, the transport device 110 can have a region located between active conveyor elements, in which the recess 112 is formed. In the example of Figs. 2A and 2B, this region lies between two conveyor belts 119 that generate the propulsion of the material strip 200, while no propulsion is generated in the intermediate region itself. Thus, the transport device 110 can have a region made essentially of metal, such as a metal block, in which the recess 112 is formed, e.g., by a machining process. However, the recess 112 can also be formed by a gap between two adjacent conveyor mechanisms, e.g., as a gap between two conveyor belts 119.
[0042] The recess 112 defines edges 114, 116 in the surface of the transport device along the transport path of the strip. Viewed in the transport direction x, a start of the recess 112 defines a first edge 114 and an end of the recess 112 defines a second edge 116. The term "edge" here should not only include transitions at which two surfaces abut one another at a certain angle, as arise, for example, in a recess 112 milled into a metal block, but also curves with which the recess 112 begins and ends. For example, the ends of conveyor belts 119 should also be understood as edges if the recess 112 is formed by a gap between conveyor belts 119. An edge is therefore in particular the transition from the upper or conveying surface of the transport device 110 to the free space created by the recess 112.
[0043] If the material strip 200 is cut as described above such that the remaining part 230 of the strip 200 has a tip 220 resting on the upper side of the transport device 110, there is a risk that this tip will sink into the free space created by the recess 112 as the remaining part 230 is advanced and will be pushed against the second edge 116 or the part of the transport device 110 located below the second edge 116. This will result in a deformation of the strip 200. Furthermore, without manual correction, the strip 200 will be conveyed further into the recess in this manner, which could result in damage to the transport device 110 and a significant loss of material.
[0044] To avoid this problem, the transport device 110 is suitable for the first
[0045] Edge 114 is to be raised relative to the second edge 116 after the strip 200 has been cut until the tip 220 of the uncut part 230 of the strip 200 has been transported over the second edge 116 by the transport device 110.
[0046] By changing the height level of the first edge 114 above the level of the second edge 116, the distance by which the tip 220 can descend after losing contact with the first edge 114 is increased. This provides sufficient time to move the uncut portion 230 of the strip 200 beyond the second edge 116, so that the tip 220 comes to rest on the transport device 110, even if it descends on the second edge 116 or further in the transport direction x.
[0047] Since the descent of the tip 220 typically occurs at a speed less than or equal to the conveying speed through the cutting device 100, it is sufficient to raise the first edge 114 relative to the level of the second edge 116 by a distance approximately corresponding to the width of the recess 112 in the transport direction x. If the transport speed is higher than the descent speed, an offset by a smaller amount may also be sufficient.
[0048] The manner in which the relative offset between the first edge 114 and the second edge 116 is achieved in the transport device 110 is arbitrary, as long as it is ensured that the uncut part 230 of the strip 200 is not deformed or gets stuck on or in the recess 112.
[0049] The manner in which the generation of the relative offset is triggered is also arbitrary, as long as the above-mentioned result is achieved. For example, it is conceivable to use a control device such as a computer, a processor, a program or the like, which triggers the generation of the relative offset based on sensor data, such as camera data, movement data of the transport device 110 and the cutting device 120 and the like. However, it is also possible to trigger the offset purely mechanically, e.g. by the movement of the transport device 110, the material strip 200 or the cutting device 120 actuating a lever, a rocker or a switch, which then in turn triggers the generation of the offset. Furthermore, due to the design, the offset can always be generated automatically after the cutting process has been completed.
[0050] After the tip 220 has passed the second edge 116, the transport device is returned to its starting position. This prevents excessive deformation of the material strip 200 due to the height offset in the conveyor line and facilitates conveyance. Furthermore, returning it to the starting position also enables smooth transfer of the material strip 200 over the recess 112 during the next cutting operation.
[0051] Figs. 2A and 2B show, by way of example, one possibility for creating the offset between the first edge 114 and the second edge 116 discussed above. As shown in Figs. 2A and 2B, the transport device 110 is designed as a two-part block in the region of the cutting device 120, with both parts of the block defining the recess 112. Thus, the first edge 114 is formed on the upstream part in the transport direction x, and the second edge 116 is formed on the downstream part. The upstream part can be moved upward, e.g., hydraulically or electrically, thereby bringing the first edge 114 to a height level above the second edge 116.
[0052] 2A and 2B, the movement in the transport direction is diagonally upward. This has the advantage that the recess 112 not only has to be bridged by the advance of the uncut part 230 of the strip 200, but is also partially closed by the movement of the first edge 114. In this way, it is possible to reliably bring the tip 220 of the uncut part 230 over the second edge 116 without deformation. Once this has happened, the two-part block is returned to its starting position for a further cutting process. It goes without saying that Figs. 2A and 2B are purely examples and not to scale. For example, the horizontal extent of the block arranged in the area of the cutting device 120 has been exaggerated for reasons of clarity. Furthermore, the two parts of the block can also be movably connected to one another.The parts of the support frame do not have to be solid. Rather, they can also be designed as a comparatively thin first support surface 111 and a second support surface 113, which are movably held by a supporting structure. The support surfaces 111, 113 can also have movable elements such as rollers or conveyor belts that facilitate the advancement of the strip 200 over the support surfaces 111, 113. Furthermore, in addition to or alternatively to raising the first edge 114, the second edge 116 can also be lowered.
[0053] For the example of Figs. 2A and 2B, it is crucial that the transport device 110 is capable of raising the first support surface 111 in the area in front of the first edge 114 and / or lowering the second support surface 113 in the area after the second edge 116. This ensures a secure transition over the recess 112, even though the cut creates a tip 220 at the bottom.
[0054] In the example shown in Figs. 2A and 2B, the first support surface was moved diagonally upward to bridge the recess. However, it may also be sufficient to raise the first support surface 111 or lower the second support surface 113 by linear, vertical movements of the support surfaces 111, 113.
[0055] This is shown schematically and purely by way of example in Figs. 3A and 3B. The structure of Fig. 3A corresponds to the structure of Fig. 2A. Instead of moving the front part of the block with the first support surface 111, the downstream part of the block with the second support surface 113 is moved linearly downward. This also allows the transition created by the recess 112 to be closed and the uncut part 230 of the strip 200 to be safely brought over the second edge 116 without deformation. A purely linear, vertical movement can also simplify the system structure.
[0056] As shown in Figs. 3A and 3B, it may be advantageous if the downstream part of the transport device 110 is arranged at a height level that corresponds to the level of the lowered second edge 116, since in this case the cut-off part of the strip 200 can be transported away without further deformation.
[0057] In the above examples, the offset between the first edge 114 and the second edge 116 was generated by linear movements of two separate support surfaces 111, 113. Alternatively or additionally, the offset can also be achieved, for example, by rotating the component of the transport device 110 containing the recess 112.
[0058] For this purpose, the transport device 110 can have an axis 118 running horizontally and perpendicular to the transport direction x and can be suitable for rotating a support surface 115 of the strip 200 in the region of the recess 112 in the transport direction x about the axis 118 in such a way that the first edge 114 is raised relative to the second edge 116.
[0059] A schematic, exemplary structure of such an arrangement is shown in Figs. 4A and 4B. The structure essentially corresponds to the structure of Figs. 2A to 3B, but the two-part block has been replaced by an element that can rotate about the axis 118. The rotatable element has the recess 112 located in the support surface 115. After the material strip 200 has been cut through, the rotatable element is rotated in the transport direction x. This raises the first edge 114 relative to the second edge 116. At the same time, the uncut part 230 of the strip 200 is pulled in the transport direction x. The rotation about the axis 118 thus supports the propulsion of the uncut part 230. As a result, its tip 220 can pass over the second edge 116 without deformation and the strip 200 can then be positioned for the next cut. For this purpose, the rotatable element is rotated back to its starting position.
[0060] Although in Figs. 4A and 4B the rotatable element was shown with a flat support surface 115 for the sake of simplicity, the support surface can also be curved. For example, the rotatable element can be designed as a roller with a slot forming the recess 112. Therefore, the first edge 114 does not necessarily have to be arranged at the same height level as the second edge 116 during the cutting process. It can also be located below or above this level. In principle, this also applies to the variants shown in Figs. 2A to 3B.
[0061] It goes without saying that, in addition to the configurations described above, various variants exist for increasing the distance between the first edge 114 and the second edge 116. The configurations described above are therefore not to be understood as limiting. What is crucial is that after the strip 200 has been cut, the upstream, uncut portion 230 of the strip 200 is raised relative to the cut portion. This prevents the tip 220 formed at the bottom of the upstream portion 230 from becoming caught in the recess 112 for the cutting blade 122.
[0062] The cutting device 100 described above can advantageously be used in an extrusion device 300, as shown schematically in Fig. 5.
[0063] The extrusion device 300 is used to produce strip-shaped rubber extrudates, in particular semi-finished tires, and comprises at least one extruder 310 for producing the strip-shaped rubber extrudates, a cutting device 100 as described above for cutting the strip-shaped rubber extrudates, a material feed 320 for feeding starting materials for producing the rubber extrudates to the extruder 310, and a depositor 330 for depositing portions of the strip-shaped rubber extrudates cut off in the cutting device 100. The extruder 310, the cutting device 100, and the depositor 330 are connected by a conveyor line 340, and the material feed 320 and the depositor 330 are arranged on the same side of the conveyor line 340.
[0064] The extrusion device 300 shown in Fig. 5 corresponds in its construction to a known construction in which, for logistical and space-related reasons, the delivery of the starting materials for the extrudate and the removal of the finished cut strips are to take place on the same side of the system.
[0065] However, the cutting device 100 described above makes it possible to place the cut material strips in the tray with a tip located in the transport direction x and on the underside of the strips, without having to extensively adapt the known structure of the extrusion device 300. This allows further processing steps that require such a tray for optimized processing to be implemented without additional effort.
[0066] Optionally, the extrusion device 300 can also include a conventional turning device 350, which is suitable for turning the pieces cut in the cutting device 100 around their longitudinal axis before they are deposited in the storage device 340. This allows for further orientation of the cut strips within the already known process effort. This can also serve to optimize further processing steps.
[0067] Fig. 6 shows a schematic flow diagram of a method for cutting strips of deformable material using a cutting device 100 as described above.
[0068] At S110, the strip 200 lying on the transport device 110 is transported along a transport direction x through the cutting device 100. At S120, the strip 200 is cut by the cutting blade 122 along a cutting surface 210, which runs obliquely from top to bottom in the transport direction x through the strip 200 lying on the transport device 110.
[0069] At S130, after the strip 200 has been cut, the first edge 114 is raised relative to the second edge 116 until a tip 220 of the uncut part 230 of the strip 200 has been transported by the transport device 110 over the second edge 116.
[0070] This allows the advantages mentioned above to be achieved and the problems mentioned at the beginning to be solved.
[0071] List of reference symbols
[0072] Cutting device
[0073] T ransport device
[0074] First contact surface
[0075] Deepening
[0076] Second support surface
[0077] First edge
[0078] Support surface
[0079] Second edge
[0080] axis
[0081] Conveyor belts
[0082] Cutting device
[0083] Cutting knife
[0084] Strips of deformable material
[0085] Cutting surface
[0086] Great
[0087] Uncut part of the strip
[0088] Extrusion device
[0089] Extruder
[0090] Material feed
[0091] filing
[0092] Conveyor line
[0093] Turning device
Claims
Claims 1. Cutting device (100) for cutting a strip (200) of deformable material, comprising: a transport device (110) for transporting the strip lying on the transport device (110) through the cutting device (100) along a transport direction (x); and a cutting device (120) for cutting the strip (200) by means of a cutting blade (122) along a cutting surface (210) which runs obliquely from top to bottom in the transport direction (x) through the strip (200) lying on the transport device (110); wherein the transport device (110) has a recess (112) in the region of the cutting device (120) for receiving the cutting blade (122) when cutting the strip (200); a beginning of the recess (112) defined a first edge (114) as seen in the transport direction (x) and an end of the recess defined a second edge (116) as seen in the transport direction (x);and the transport device (110) is adapted to raise the first edge (114) relative to the second edge (116) after the strip (200) has been cut until a tip (220) of the uncut part (230) of the strip (200) has been transported by the transport device (110) over the second edge (116); 2. Cutting device (100) according to claim 1, wherein the transport device (110) is suitable for raising a first support surface (111) of the strip (200) in the region in front of the first edge (114) and / or lowering a second support surface (113) of the strip (200) in the region after the second edge (116).
3. Cutting device (100) according to claim 2, wherein the transport device (110) is suitable for realizing the raising of the first support surface (111) or the lowering of the second support surface (113) by linear, vertical movements of the support surfaces (111, 113).
4. Cutting device (100) according to claim 1, wherein the transport device (110) has an axis (118) running horizontally and perpendicular to the transport direction (x) and is suitable for rotating the support surface (115) of the strip (200) in the region of the recess (112) in the transport direction (x) about the axis (118) in such a way that the first edge (114) is raised relative to the second edge (116).
5. Cutting device (100) according to one of the preceding claims, wherein the strip (200) of deformable material is a semi-finished tire.
6. An extrusion device (300) for producing a strip-shaped rubber extrudate, in particular semi-finished tire products, comprising: at least one extruder (310) for producing the strip-shaped rubber extrudate; a cutting device (100) according to any one of the preceding claims for cutting the strip-shaped rubber extrudate; a material feed (320) for feeding starting materials for producing the rubber extrudate to the extruder (310); and a depository (330) for depositing portions of the strip-shaped rubber extrudate cut off in the cutting device (100); wherein the extruder (310), the cutting device (100), and the depository (330) are connected by a conveyor line (340), and the material feed (320) and the depository (330) are arranged on the same side of the conveyor line (340).
7. Extrusion device (300) according to claim 6, further comprising a Turning device (350) which is suitable for turning the parts cut off in the cutting device (100) around their longitudinal axis before they are placed in the storage device (340).
8. A method for cutting a strip (200) of deformable material by means of a cutting device (100) according to claim 1, comprising: Transporting the strip (200) lying on the transport device (110) through the cutting device (100) along a transport direction (x); Cutting the strip (200) by means of the cutting blade (122) along a cutting surface (210) which runs obliquely from top to bottom in the transport direction (x) through the strip (200) lying on the transport device (110); and Raising the first edge (114) after cutting the strip (200) relative to the second edge (116) until a tip (220) of the uncut part (230) of the strip (200) has been transported by the transport device (110) over the second edge (116).