Cutting device and method for cutting elastic materials in bale form

Abstract

The invention relates to a cutting device (1) for cutting elastic materials in bale form having a cutting table (2) for placing a bale (9) and a cutting blade (5) for cutting the bale (9), wherein the cutting blade (5) is designed to move in the direction of the cutting table (2) during cutting, wherein the cutting table (2) has a cutting bar (4), wherein the cutting bar (4) is movably mounted by means of at least one resetting element (6), so that the cutting bar can move in the direction of movement of the cutting blade (5) during cutting.

Description

[0001] P2024, 0910 WO N 23. September 2025

[0002] 1

[0003] Description

[0004] Cutting device and method for cutting elastic materials in bale form

[0005] The present invention relates to a device and a method for cutting elastic materials in bale form. In particular, these can be materials for the rubber processing industry. For example, they are bales of raw polymers, especially rubber or silicone compounds.

[0006] In the rubber processing industry and other sectors, materials are often delivered in bales. These bales have varying dimensions, for example, 600 x 350 x 200 mm (length x width x height). The bales typically weigh 35 kg. They must be cut into smaller pieces to achieve a precise formulation for subsequent processing, particularly for use in mixers.

[0007] In the rubber industry, discontinuous internal mixers are used to process raw rubber compounds. The formulations for these compounds are tailored to the respective end product. To cut the mixture to a target weight, the bales are cut. For example, a formulation might specify 50 kg of a particular type of rubber. To achieve this quantity, a whole 35 kg bale is used, and an additional 15 kg is cut from another bale. P2024, 0910 WO N 23 September 2025

[0008] 2

[0009] For this purpose, so-called rubber splitters are used, which are designed to cut up rubber bales or similar elastic bales with the help of a knife.

[0010] Rubber splitters based on the so-called shear-cut principle are known, in which a blade is guided closely past a fixed cutting edge. Both the blade and the cutting edge are made of hard metal. For example, DE 103 06 372 B4 shows such a rubber splitter.

[0011] One problem with these types of rubber splitters is that they are not always able to completely split the rubber bale. During the cutting process, significant spreading forces develop between the moving blade and the fixed cutting edge, causing a gap to form between the blade and the cutting edge. Gap formation also often occurs when the blade and / or cutting edge wears down, resulting in impaired cutting performance and therefore incomplete cuts.

[0012] Furthermore, rubber splitters based on the so-called anvil cutting principle are known, as described, for example, in DE 103 06 372 B4. In such rubber splitters, a movable blade is pressed against a cutting edge. The cutting edge is made of a softer material than the cutting blade.

[0013] Here too, an incomplete cut of the bale can occur. One reason for this is that the knife has to be pushed through the bale with great pressure to cut it. When the knife reaches the ridge, it must P2024, 0910 WO N 23. September 2025

[0014] 3. The cutting bar must be stopped directly and very precisely to prevent the bale from catching on the cutting bar and damaging it. However, precise control of the movement under high force is difficult, as each bale offers slightly different resistance to being cut. Over time, this leads to damage to the cutting bar, so that a precise cut is no longer possible and the bale is often no longer completely severed.

[0015] Because the bales are not completely cut, further processing is required, meaning the material has to be cut multiple times or additionally processed manually. This leads to increased labor and prevents full automation of bale handling.

[0016] The object of the present invention is to provide an improved device for cutting elastic materials in bale form.

[0017] This problem is solved by a device according to claim 1. Furthermore, the independent method claim protects a method for cutting using such a device. The dependent claims describe advantageous embodiments.

[0018] According to a first aspect, a cutting device for cutting elastic materials in bale form has a cutting table for placing a bale and a cutting blade for cutting the bale. The cutting blade is designed to move during cutting. The cutting table has a cutting edge which is movably mounted by at least one return element, so that the P2024, 0910 WO N 23 September 2025

[0019] 4

[0020] The cutting edge is movable in the direction of movement of the cutting blade during cutting. The cutting blade moves, in particular, in the direction of the cutting edge. This direction of movement is, for example, perpendicular to a support surface of the cutting table onto which the bale is placed.

[0021] For example, the material could be a raw polymer for the rubber processing industry. Specifically, it could be a ball of rubber or silicone. It could also be another type of material used in the manufacture of an industrial product in the technical industry. The material is processed, for example, in an industrial plant.

[0022] In particular, the material may be intended for mixing in a mixer, where a specific quantity of the material is required for a given mixing recipe. This necessitates cutting off a section of the bale completely.

[0023] The movable mounting of the cutting edge allows it to yield in the direction of the blade's movement during cutting, particularly downwards. This reduces damage to the cutting edge and / or the cutting blade, as the mechanical impact of the blade on the cutting edge is reduced. This also ensures precise cutting and complete separation, even after numerous cutting operations. Furthermore, the cutting blade can be operated at higher speeds because the movement of the cutting edge provides a greater braking distance. (See also P2024, 0910 WO N 23. September 2025)

[0024] 5. The cutting process is simplified because the cutting blade no longer needs to be stopped precisely at the end of the cutting process.

[0025] The cutting edge can be pressed downwards by the cutting blade, particularly during the cutting process. The return element generates a counterforce from the cutting edge onto the cutting blade. It is also possible for the cutting edge to be moved downwards by a separate, actively driven element. After the cutting process, the return element can move the cutting edge back to its starting position. This starting position can be such that the cutting edge is flush with the support surface of the cutting table.

[0026] For example, the cutting edge is arranged in a recess in the cutting table. The return element can also be arranged in the recess.

[0027] The cutting device is specifically designed so that the bale rests partly on a stationary support surface of the cutting table and partly on the movable cutting bar. During cutting, shear forces can occur in the bale due to the movement of the cutting bar relative to the support surface, thereby improving the cutting effect. In particular, the elastic material can be pressed downwards by the cutting blade and the cutting bar to a certain extent.

[0028] The cutting strip can be designed, for example, as a rectangular strip or a round strip. The cutting strip can also have a cross-sectional shape other than rectangular or round. The cutting strip is the part of the cutting table that is connected to the P2024, 0910 WO N 23. September 2025

[0029] 6

[0030] The knife edge comes into contact when the bale is completely cut through.

[0031] The return element can be designed as a spring element. This allows the cutting edge to be spring-mounted. The compression of the spring element generates the counterforce from the cutting edge to the cutting blade. Furthermore, after the cutting process, the spring element releases its tension, returning the cutting edge to its starting position.

[0032] The spring element is designed, for example, as a gas spring. It can also be a mechanical spring, such as a coil spring. It is also possible that the spring element is formed from an elastic material, such as a rubber block.

[0033] The spring element can have an adjustable spring action, so that the spring force can be changed by adjusting the spring element. For example, an adjustable gas spring can be used. The spring force is adjusted differently for different materials and / or bale sizes to achieve optimal cutting performance in each case.

[0034] The return element can also be designed as an actively operated element. The actively operated element serves to move the cutting edge, generate a counterforce on the cutting blade, and return the cutting edge to its original position. For example, it could be a hydraulically, pneumatically, or electromechanically operated cylinder. Here, too, the counterforce on the cutting blade can be adjusted. P2024, 0910 WO N 23. September 2025

[0035] - 7 -

[0036] The cutting device can have a single return element or multiple return elements. The return elements can be arranged side by side. For example, the return elements can be arranged in a single row or in multiple rows. Multiple return elements result in a more uniform movement of the cutting edge. The return elements can be designed as spring elements, as actively operated elements, or as a combination of spring and actively operated elements. In the following, the term "return element" is generally used, but this also refers to multiple return elements.

[0037] A support can be arranged between the cutting edge and the return element. For example, the support is designed as a plate, in particular as a strip. The support is designed to distribute the force exerted on the cutting edge evenly to the return element or the multiple return elements, and vice versa.

[0038] The carrier can have a greater hardness than the cutting edge. For example, the cutting edge may be made of a soft material. In particular, the cutting edge may be made of plastic, aluminum, brass, or rubber. The carrier may be made of a metal, especially a hard metal.

[0039] The cutting table may have a chamfer to facilitate the separation of a section from the bale. In particular, the chamfer may be designed such that the bale rests partly on the support surface and partly above the cutting bar during cutting. P2024, 0910 WO N 23. September 2025

[0040] The bevel is arranged in position 8 and is partially positioned above the chamfer. During the cutting process, the workpiece can bend downwards due to the chamfer, which leads to increased shear forces and improved cutting performance. The chamfer also allows for controlled feed of the workpiece. Furthermore, the chamfer prevents the workpiece from becoming jammed between the cutting blade and the cutting table. Jamming can occur with a non-chamfered cutting table, particularly if the cutting blade has a chamfer, causing the workpiece to become trapped between the chamfer and a horizontal surface of the cutting table.

[0041] The cutting device may include a conveying system designed to transport the cut-off section. This conveying system could be, for example, a roller conveyor or conveyor belt.

[0042] The cutting device may have a stop to limit the movement of the cutting bar in the direction of movement of the cutting blade during cutting, in order to prevent damage to the return element. In particular, the stop can prevent excessive compression of a spring element or excessive force on an actively operated return element.

[0043] For example, the stop can be formed by the bottom of a recess in the cutting table in which the cutting edge is arranged. The return element can be arranged, at least partially, in a recess in the bottom of this recess. P2024, 0910 WO N 23. September 2025

[0044] 9

[0045] The cutting device can have at least one vibration generator to produce a vibration of the cutting edge. This vibration is superimposed on the previously described movement of the cutting edge during cutting. For example, a vibration is generated in a horizontal direction, i.e., in the plane of a support surface of the cutting table. In particular, the direction can be parallel to the cutting edge of the cutting blade. A vibration can also be generated in a vertical direction, i.e., perpendicular to the support surface.

[0046] For example, the vibration generator is designed as a piezoelectric transducer or electric motor. The movement can be, in particular, an ultrasonic vibration.

[0047] The cutting edge can be designed for installation in the cutting table in different orientations. This allows the cutting position on the cutting edge to be changed, particularly by rotating and flipping the cutting edge. This has the advantage of extending the service life of the cutting edge.

[0048] The cutting blade can be designed to act decentrally on the cutting strip, so that a new cutting position is achieved when turning.

[0049] It is also possible that the cutting edge is rotatable around its longitudinal axis. This can be particularly advantageous with a round edge, as a slight rotation allows for use with a new cutting position. Furthermore, rotating the round edge can also... P2024, 0910 WO N 23. September 2025

[0050] 10

[0051] The bale is advanced to the cutting position on the cutting table.

[0052] According to another aspect, in a method for cutting elastic materials with the cutting device described above, a bale is arranged on the cutting table. Specifically, a portion of the bale is positioned above the cutting bar. This portion can, in particular, rest on the cutting bar. The cutting blade is moved to cut the bale, with the cutting bar being moved in the direction of movement of the cutting blade by the movable bearing. The return elements can exert a counterforce on the cutting blade. Specifically, the cutting blade is moved downwards, i.e., in the direction of gravity. As described above, the deflection of the cutting bar reduces damage to the cutting bar and the cutting blade and facilitates the complete cutting of a section of the bale.

[0053] After the cutting process, the cutting blade can be moved in the opposite direction, particularly upwards. Due to the movable bearing provided by the return element, the cutting bar is also moved in the opposite direction. Specifically, the cutting bar returns to its starting position.

[0054] The present invention comprises several aspects, in particular devices and methods. The features, properties, and embodiments described for one aspect shall also apply accordingly to the other aspect. P2024, 0910 WO N 23. September 2025

[0055] 11

[0056] Furthermore, the description of the items listed here is not limited to the specific forms of execution.

[0057] Rather, the characteristics of the individual implementation forms can

[0058] - where technically feasible - they can be combined with each other.

[0059] The following section provides a more detailed explanation of the items described here, using schematic examples.

[0060] They show:

[0061] Figure 1A shows an embodiment of a cutting device in longitudinal section with a cutting blade in an upper position.

[0062] Figure 1B shows the embodiment of the cutting device according to Figure 1A with a cutting blade in a lower position.

[0063] Figure 2 shows the embodiment of the cutting device according to Figures 1A and 1B when cutting a bale.

[0064] Figure 3 shows another embodiment of a cutting device in a frontal view with partial sectional view.

[0065] Figure 4 shows the embodiment according to Figures 1A and 1B with a cutting strip that can be installed in different orientations.

[0066] Figure 5 shows another embodiment of a cutting device in a frontal top view with partial sectional view, P2024, 0910 WO N 23. September 2025

[0067] 12

[0068] Figure 6 shows another embodiment of a cutting device in longitudinal section.

[0069] Preferably, in the following figures, the same reference symbols refer to functionally or structurally corresponding parts of the different versions.

[0070] Figure 1A shows a cutting device 1 for cutting an elastic material in bale form. For example, the material could be a raw polymer for the rubber processing industry. It could also be another material for the manufacture of an industrial product. The material is processed, for example, in an industrial plant. In particular, the material could be intended for mixing in a mixer. A specific quantity of material is required for further processing, which can be provided as needed by cutting the bale.

[0071] The cutting device 1 has a cutting table 2 with a support surface 3 for supporting a bale. The cutting device 1 has a cutting bar 4 and a cutting blade 5, which is moved downwards, i.e., in the direction of the cutting bar 4, to cut the bale.

[0072] The cutting edge 4 is movably mounted in the cutting table 2. At least one return element 6 is arranged within a recess 7 of the cutting table 2. In the embodiment shown here, the return element 6 is a spring element. Due to the spring mounting, the cutting edge 4 is designed to also move downwards, i.e., in the direction of movement of the cutting blade 5, when force is applied by the cutting blade 5. P2024, 0910 WO N 23. September 2025

[0073] 13 move. The return element 6 exerts a counterforce on the cutting blade 5.

[0074] Alternatively, the return element 6 can also be designed as an actively operated element, such as a hydraulically, pneumatically, or electromechanically operated cylinder. The actively operated element can also generate a downward movement of the cutting bar 4, exert a counterforce on the cutting blade 5, and return the cutting bar 4 to its initial position after the cutting process. All descriptions of the return element 6 apply to both spring-loaded and actively operated elements.

[0075] There can be only a single reset element 6, or there can be several reset elements 6. For example, several reset elements 6 can be arranged one behind the other in the direction shown in Figure 1A. Alternatively or additionally, several reset elements 6 can also be arranged side by side in a lateral direction.

[0076] In this way, the cutting action of the cutting device 1 can be improved. Firstly, the damage to the cutting edge 4 and / or the cutting blade 5, which often occurs with the anvil principle, is reduced by the cutting blade 5 being worked into the cutting edge, as the cutting edge 4 can deflect downwards at least a little. This also eliminates the need to stop the cutting blade 5 precisely upon contact with the cutting edge 4. This simplifies the cutting process. Furthermore, a faster travel speed of the cutting blade 5 is possible because a greater braking distance is available. P2024, 0910 WO N 23 September 2025

[0077] Furthermore, during cutting, shear forces occur in the bale due to the movement of the cutting bar 4 relative to a support surface 3 of the cutting table 2, which further improves the cutting effect. In particular, tensile stresses in various directions are present between the parts of the bale 9 due to the shear forces.

[0078] The return element 6, designed as a spring element in this case, can be a mechanical spring, in particular a metallic spring. For example, it could be a coil spring. Alternatively, it could be a spring element with adjustable spring force. For example, it could be a gas spring. A spring with adjustable spring force allows the counterforce to be set to achieve optimal cutting performance. For example, the spring force is set differently for different materials and / or bale sizes.

[0079] It is also possible that the spring element is formed from an elastic material. Thus, the spring element's elasticity is not due to its macroscopic shape, but rather to an inherent material property. For example, the spring element might be in the form of a solid block of material. This could be a rubber material, for instance. It could also be an elastic body made of a different elastic material than rubber.

[0080] The elasticity of the elastic material is greater than the elasticity of the material of the cutting strip 4 . P2024 , 0910 WO N 23 . September 2025

[0081] 15

[0082] For example, the elasticity is at least twice as large.

[0083] A support 8 can be located between the cutting edge 4 and the return element 6. The support 8 is, for example, designed in the form of another strip. The cutting edge 4 is arranged on the support 8. The support 8 has a material with a higher hardness than the material of the cutting edge 4. In the case of a return element 6 designed as a spring element, the support 8 also has, for example, a lower elasticity than the spring element.

[0084] The support 8 serves to distribute the pressure exerted by the cutting blade 5 over the bale or directly on the cutting strip 4 to the return element 6 and vice versa. For example, the support 8 is designed as a metal strip.

[0085] Figure 1B shows the cutting device 1 from Figure 1A after the cutting blade 5 has moved downwards and pushed the cutting strip 4 downwards with it. Thus, the cutting strip 4 is recessed relative to the support surface 3. The spring element is in a compressed state.

[0086] In particular, the cutting blade 5 can be in a lower end position, so that the cutting blade 5 is stopped at this position. The end position is defined, on the one hand, by a deliberate stopping of the movement of the cutting blade 5. The cutting blade 5 can be stopped due to its vertical position or due to a counterforce acting on the cutting blade 5. P2024, 0910 WO N 23 September 2025

[0087] 16

[0088] After the bale 9 has been cut, the cutting blade 5 is moved upwards again and the cutting bar 4 returns to the starting position shown in Figure 1A by means of the return element 6, for example by the spring force of the spring element shown here or a force generated by an actively operated element.

[0089] Figure 2 shows the embodiment of the cutting device 1 according to Figures 1A and 1B when cutting a bale 9. The cutting device 1 is in the end position according to Figure 1B or is about to reach the end position.

[0090] The bale 9 rests partially on the support surface 3 of the cutting table 2. A section 10 of the bale 9 to be cut off extends beyond the support surface 3 and is positioned above the chamfer 11. This causes the section 10 to bend downwards during the cutting process due to the indentation made by the cutting blade 5, generating spreading forces (see arrows in Figure 2) that facilitate the complete removal of the section 10. This also reduces the required cutting force.

[0091] The generation of the spreading forces can be promoted by the shape of the cutting blade 5. The cutting blade 5 has a chamfer 18 on the side facing the section 10, which pushes the section 10 away from the rest of the bale 9 and downwards.

[0092] The chamfer 11 of the cutting table 2 prevents the workpiece 10 from becoming jammed between the cutting blade 5 and the cutting table 2. This is particularly relevant in the case of P2024, 0910 WO N 23, September 2025.

[0093] 17 shown cutting knife 5, which has a chamfer 18 on the side of the section to be cut 10, a jamming of the section 10 between cutting knife 5 and a support surface 3 shown here to the right of the chamfer 18 would occur if this support surface 3 were to extend to the end of the cutting table 2.

[0094] Furthermore, the chamfer 11 of the cutting table 2 allows the cut-off section 10 to slide down from the cutting table 2 in a controlled manner.

[0095] The cut-off section 10 can be transported further by means of a conveying device 12, for example by rollers or a conveyor belt. The conveying device 12 can be part of the cutting device 1 or be designed separately. The conveying device 12 is recessed at the bottom so that the bale 9 does not become trapped.

[0096] Figure 3 shows another embodiment of a cutting device 1 in a frontal view with a partial sectional view, in which the movable bearing of the cutting strip 4 can be seen.

[0097] In this embodiment, several return elements 6 in the form of spring elements, in particular coil springs, are arranged side by side on the cutting table 2 when viewed from the front. Other spring elements, such as elastic blocks or gas springs, may also be used. Alternatively, actively operated elements or a mixture of actively operated elements and spring elements may be used. P2024, 0910 WO N 23 September 2025

[0098] 18

[0099] Additional return elements 6 may also be present behind the return elements 6 in the top view of the illustration. Such an arrangement is also possible for the previously described embodiments.

[0100] The counterforce of the cutting bar 4 on the cutting blade 5 can be adjusted by the properties and the number of the return elements 6.

[0101] In addition, the embodiment shown here includes a stop 13 that limits the downward movement of the cutting edge 4. The stop 13 protects the return elements 6 from damage caused by excessive compression or force. Here, the stop 13 interacts with the support 8. It is also possible for the stop 13 to interact directly with the cutting edge 4.

[0102] In this embodiment, the stop 13 is formed by the base of the recess 7 in which the cutting edge 4 is arranged. Further recesses 14 are arranged in the base, in which the return elements 6 are located. Thus, the spring elements can be compressed to a maximum height of the stop 13, corresponding to the height of the further recesses 14, and in general, excessive force on the return elements 6 can be prevented.

[0103] Similarly, a version can also be designed with only a single return element 6. Furthermore, it is also possible that the stop 13 is designed as a different type of limit that prevents excessive force from acting on the return elements 6. P2024, 0910 WO N 23. September 2025

[0104] 19

[0105] Figure 4 shows another embodiment of a cutting device 1, in which the cutting strip 4 can be installed in the cutting table 2 in different orientations. In particular, the cutting strip 4 is designed to be installed in a different orientation after the cutting device 1 has been used in one orientation.

[0106] This has the advantage that the cutting blade 5 acts on the cutting strip 4 at different points depending on the different orientations of the cutting strip 4. If the cutting blade 5 becomes worn and the cutting strip 4 is damaged, it can still be used in a different orientation. The illustration shows the current cutting position 15 and three further possible cutting positions 16, which are possible when changing the orientation of the cutting strip 4 while keeping the cutting blade 5 in the same position.

[0107] The cutting blade 5 strikes the cutting strip 4 off-center, resulting in a different cutting position 15 when the cutting strip 4 is reversed, particularly when it is rotated about an axis corresponding to the direction of movement of the cutting blade 5. Two further cutting positions result from rotation about an axis perpendicular to this axis. This increases the overall service life of the cutting strip 4 fourfold.

[0108] Furthermore, the cutting device 1 can be designed as described in the previous embodiments.

[0109] Figure 5 shows another embodiment of a cutting device 1 with a vibration generator 17, P2024, 0910 WO N 23. September 2025

[0110] 20. This can cause a vibration of the cutting edge 4 during cutting. This can improve the cutting process and lead to a more reliable, complete cut.

[0111] The vibration generator 17 can, for example, be designed as a piezoelectric transducer or as an electric motor. The cutting edge 4 can, for example, be set into an ultrasonic vibration.

[0112] The vibration generator 17 can act on the support 8. It is also possible that the vibration generator 17 acts directly on the cutting edge 4, the return elements 6, or another element coupled to the cutting edge 4.

[0113] The vibration generator 17 shown here is mounted next to the support 8 and generates, for example, a vibration in the horizontal direction. Alternatively, the vibration generator 17 can also be arranged on the underside or top side of the support 8 or the cutting edge 4. In this case, the vibration generator 17 generates, for example, a vibration in the vertical direction.

[0114] Furthermore, the cutting device 1 can be designed as described in the previous embodiments; in particular, a vibration generator 17 can also be present with only a single restoring element 6.

[0115] Figure 6 shows another embodiment of a cutting device 1. In contrast to the other embodiments, the cutting edge 4 is designed here as a round edge, i.e., it has a circular profile in cross-section. P2024, 0910 WO N 23. September 2025

[0116] Furthermore, the cutting strip 4 is rotatably mounted. In particular, the cutting strip 4 is rotatably mounted about its longitudinal axis. In this way, the cutting position on the cutting strip 4 can be changed, as in the embodiment shown in Figure 4, so that the service life of the cutting strip 4 is extended and precise cutting can be carried out for a longer period.

[0117] Furthermore, a bale 9 can be moved into the cutting position by rotating the cutting bar 4. In this case, the upper side of the cutting bar 4 can also protrude upwards beyond the support surface, thus enabling good force transmission to the bale 9.

[0118] Thus, before the cutting process, the cutting bar 4 can be rotated so that the bale 9 is moved to the predetermined cutting position, as shown, for example, in Figure 3. The cutting bar 4 can then be fixed in place so that it can no longer be rotated, and a cutting process can be carried out in which the cutting bar 4 moves downwards. After the cutting process, the cutting bar 4 is moved back to its starting position by the return element 6. The cutting bar 4 can then be rotated to move the remaining bale 9 into the cutting position or to completely remove the section 10 from the cutting table 2.

[0119] As described in the other embodiments, the cutting edge 4 is movably mounted in the direction of movement of the cutting blade 5 and can have all the other features of the other embodiments. P2024, 0910 WO N 23. September 2025

[0120] - 22 -

[0121] Reference sign

[0122] 1 cutting device

[0123] 2 cutting table

[0124] 3. Lay on, laugh

[0125] 4 cutting strip

[0126] 5 cutting blades

[0127] 6 Return element

[0128] 7. Further Study

[0129] 8 carriers

[0130] 9 bales

[0131] 10 sections

[0132] 11 Beveled Table

[0133] 12 Funding institution

[0134] 13 attacks

[0135] 14 further in-depth analyses

[0136] 15 Cutting position

[0137] 16 previous cutting position

[0138] 17 vibration generators

[0139] 18 Beveled knife

Claims

P2024, 0910 WO N September 23, 2025 23 Patent claims 1. Cutting device (1) for cutting elastic materials in bale form, comprising a cutting table (2) for placing a bale (9) and a cutting knife (5) for cutting the bale (9), which is designed to move during cutting, wherein the cutting table (2) has a cutting strip (4), wherein the cutting strip (4) is movably mounted by at least one return element (6) so that the cutting strip (4) is movable in the direction of movement of the cutting knife (5) during cutting.

2. Cutting device according to claim 1, wherein the return element (6) is designed as a spring element.

3. Cutting device according to claim 2, wherein the spring element is a gas spring.

4. Cutting device according to claim 2, wherein the spring element is a mechanical spring.

5. Cutting device according to claim 2, wherein the spring element is formed by an elastic material.

6. Cutting device according to claim 1, wherein the return element (6) is an actively operated element, the active element being a hydraulically, pneumatically or electromechanically operated cylinder.

7. Cutting device according to one of the preceding claims, P2024, 0910 WO N September 23, 2025 24 having several return elements (6) for movable mounting of the cutting strip (4) .

8. Cutting device according to one of the preceding claims, wherein a support (8) is arranged between the cutting strip (4) and the return element (6), wherein the support (8) has a greater hardness than the cutting strip (4).

9. Cutting device according to claim 8, wherein the cutting strip (4) comprises plastic, aluminium, brass or rubber and the support (8) comprises metal.

10. Cutting device according to one of the preceding claims, wherein the cutting table (2) has a chamfer (11) to facilitate the separation of a section (10) from the bale.

11. Cutting device according to one of the preceding claims, comprising a conveying device (12) for transporting a section (10) separated from the bale (9).

12. Cutting device according to one of the preceding claims, comprising a stop (13) to limit the movement of the cutting strip (4) in the direction of movement of the cutting knife (5) in order to prevent damage to the return element (6).

13. Cutting device according to one of the preceding claims, comprising at least one vibration generator (17) for generating a vibration of the cutting bar (4) during cutting. P2024, 0910 WO N September 23, 2025 25 14. Cutting device according to one of the preceding claims, wherein the cutting strip (4) can be positioned in different orientations in the cutting table (2) so that the cutting position (15) on the cutting strip (4) can be changed.

15. Cutting device according to claim 14, wherein the cutting strip (4) is rotatably mounted about its longitudinal axis.

16. Cutting device according to one of the preceding claims, wherein the cutting strip (4) is designed as a round strip.

17. Method for cutting elastic materials in bale form with the cutting device (1) according to one of the preceding claims, wherein a bale (9) is arranged on the cutting table (2), wherein the cutting knife (5) is moved to cut the bale (9), wherein the cutting strip (4) is moved by the movable bearing in the direction of movement of the cutting knife (5).

18. Method according to claim 17, wherein the cutting blade (5) is moved in the opposite direction after the cutting process and the cutting bar (4) returns to its starting position by the return element (6).

19. Method according to one of claims 17 or 18, wherein the bale (9) is placed partially on a support surface (3) of the cutting table (2) for cutting, partially above the P2024, 0910 WO N September 23, 2025 - 26 - cutting strip (4) and is partially arranged above a chamfer (11) of the cutting table (2).

Images