Apparatus and method for cutting strips of deformable material - Patent Application 20070122997

Abstract

The separating device (100) for cutting a strip (200) made of a deformable material includes a conveying device (110) for conveying the strip located on the conveying device (110) through the separating device (100) in a conveying direction (x), and a cutting device (120) for cutting the strip (200) using a cutting cutter (122) along a cutting surface (210) extending obliquely from above to below in the conveying direction (x) through the strip located on the conveying device (110). In such a separating device (100), the conveying device (110) has, in the region of the cutting device (120), a recess (112) for accommodating a cutting cutter (122) when cutting the strip (200), the beginning of the recess (112) defining a first edge (114) as seen in the conveying direction (x) and the end of the recess defining a second edge (116) as seen in the conveying direction (x). The conveying device (110) is adapted to raise the first edge (114) relative to the second edge (116) after cutting the strip (200) until the leading edge (220) of the uncut portion (230) of the strip (200) has been conveyed beyond the second edge (116) by the conveying device (110).

Description

[Technical Field]

[0001] The present invention relates to an apparatus and a method for cutting strips of deformable material, in particular tire blanks. [Background technology]

[0002] In modern manufacturing, it is known to produce a large number of deformable materials in strip form, for example by pressing, extrusion or similar methods. The production is often carried out in the form of an endless strip, i.e., the strip is first produced without interruption. One example of such a production is the production of tire semi-finished products, such as tire treads or sidewall strips for tires, especially automobile tires, using an extruder.

[0003] For separation and further processing, such strips of deformable material must be cut. It is often technically necessary for the cuts to extend obliquely through the material, especially if it is desired that the cut surfaces serve as joints for joining the separated strips, since this increases the bonding area. In tire manufacturing, in particular, the cut tire semifinished products are formed into cylindrical shapes by gluing the two cut surfaces of the semifinished products together. Oblique cut surfaces allow for better bonding of the cut surfaces due to the increased surface area compared to perpendicular cuts.

[0004] Often, the material strip has a different structure on both sides: for example, a semi-finished tread for a car tire has on one side a molding surface on which the tire groove pattern is formed, while the other side is designed for bonding with the inner tire layer.

[0005] Since there are two possibilities for the extension of the cut surface, i.e., cutting against the conveying direction and cutting in the conveying direction, and since there is a difference between both positions of the strip due to the different surfaces of the strip, there are in principle four possibilities for depositing the cut material strip for the above-described case, which are shown in Figures 1A to 1D.

[0006] 1A shows the case where the strip 20 is cut obliquely against the conveying direction x. The upper side 22 (e.g. the groove pattern side) faces upwards. The strip rests on its lower side 24, i.e. the upper side 22 extends further forward than the lower side 24 when viewed in the conveying direction x.

[0007] 1B shows the case where the strip 20 is cut obliquely in the same direction as the conveying direction x. The upper side 22 also points upwards in this example, and the strip 20 rests with its lower side 24. However, the lower side 24 extends further forward than the upper side 22 when viewed in the conveying direction x.

[0008] In Figures 1C and 1D, strip 20 is cut as in Figures 1A and 1B, but is flipped over along its longitudinal axis before deposition, i.e., bottom side 24 faces upward and top side 22 faces downward.

[0009] A simple technical implementation of these four deposit possibilities currently exists only for the cases shown in Figures 1A and 1C, i.e., for oblique cuts against the conveying direction. This is because, when cutting in the same direction as the conveying direction, a leading edge occurs on the underside of the material strip. This leading edge can be deformed by collisions with the conveying mechanism of the cutting system, especially immediately after cutting, which can render the material strip unusable or increase material waste.

[0010] On the other hand, to optimize the further processing of the cut strips, it may be advantageous to deposit the cut strips as shown in FIGS. 1B and 1D. However, this is currently only possible with considerable effort. It is certainly possible to rotate the cut material strips 180° before depositing them. However, this is technically quite complex and costly. Furthermore, it requires a lot of space in the facility. Alternatively, it is possible to rotate the deposit station, for example, a book cart in the production of semi-finished tires, by 180°. However, this also increases the complexity, costs, and often the space required in the facility. Summary of the Invention [Problem to be solved by the invention]

[0011] It is therefore an object of the present invention to provide an apparatus and a method for cutting strips of deformable material, which can overcome the above-mentioned problems, and in particular to cut the strip in the conveying direction without deforming the strip, thereby enabling the deposit positions shown in Figures 1B and 1D. [Means for solving the problem]

[0012] This problem is solved by the subject matter of the independent claims.

[0013] A separating device for cutting a strip made of a deformable material includes a conveying device for conveying the strip, which is located on a conveying device, through the separating device in a conveying direction, and a cutting device for cutting the strip, located on the conveying device, with a cutting cutter along a cutting surface extending obliquely from above to below in the conveying direction. In such a separating device, the conveying device has, in the area of ​​the cutting device, a recess for accommodating the cutting cutter when cutting the strip, the beginning of the recess defining a first edge as viewed in the conveying direction, and the end of the recess defining a second edge as viewed in the conveying direction. The conveying device is suitable for raising the first edge relative to the second edge after cutting the strip until the leading edge of the uncut portion of the strip is conveyed beyond the second edge by the conveying device.

[0014] The separating device is constructed in a manner known in principle. A conveying device, such as a conveyor belt or roller belt, transports the endless material strip toward the cutting device, where a cutting cutter, such as a rotating cutting blade, laser cutter, or ultrasonic cutter, sequentially separates the respective leading portions of the material strip. During the cutting process, the cutting cutter enters a recess in the conveying device, which may be configured as a groove or channel extending transversely to the conveying direction. The recess forms a first edge at its beginning and a second edge at its end in the upper surface of the conveying device. To bring the unseparated portion of the strip into the correct position for further separation, the strip must be moved past the recess.

[0015] However, in contrast to the known installations, the cutting cutters of the cutting device are arranged in such a way that they produce a cutting surface that runs obliquely from top to bottom in the conveying direction, with the side of the uncut strip that rests on the conveying device being located further forward in the conveying direction than the upper side of the strip.

[0016] When the remaining part is moved beyond the recess of the cutting device, it may collide with the second edge of the recess. This is because the deformable material of the strip sinks into the recess and may be located deeper than the upper surface of the conveying device, which is adjacent to the recess in the conveying direction. To solve this problem, the first edge can be raised relative to the second edge, or the second edge can be lowered relative to the first edge. This ensures that the extruded leading edge of the strip does not collide with the wall of the recess and reaches the upper surface of the conveying device, which is adjacent to the recess, without deformation. Once the leading edge is brought beyond the second edge, the relative positions of the first and second edges can be leveled again to create the same starting conditions for the next cut.

[0017] The conveying device may be adapted to raise the first resting surface of the strip in a region in front of the first edge and / or lower the second resting surface of the strip in a region behind the second edge. The change in relative position is thus caused by a change in the height position of the resting surface in front of and / or behind the recess. For example, the conveying device may be divided into two by a recess in the region of the cutting device, so that the height of the conveying device can be changed independently in front of and behind the recess. The height change can be caused, for example, by a hydraulic actuator or an electric motor.

[0018] The conveying device of the present invention may be adapted to raise the first support surface or lower the second support surface by linear vertical movement of the support surfaces, for example, a hydraulic actuator may move the first support surface upward or the second support surface downward (or both).

[0019] However, the conveying device may also have an axis extending horizontally and perpendicularly to the conveying direction and be adapted to rotate about the axis in the conveying direction so as to raise the resting surface of the strip relative to the second edge in the region of the recess. In this configuration, the conveying device may have, for example, a block rotatably supported on an axis in the region of the cutting device, with the resting surface and the recess formed on its upper side. When the block rotates in the conveying direction from a position in which the resting surfaces are at the same height, the second edge is lowered to a greater extent than the first edge. This easily prevents the extruded strip from colliding with the wall of the recess. Furthermore, the rotational movement in the conveying direction supports further transport of the uncut portion of the strip.

[0020] The strip of deformable material may in particular be a tire semi-finished product, such as a tread or a sidewall strip, so that the advantages mentioned above can be utilized for tire production.

[0021] An extrusion apparatus for producing a strip-shaped raw rubber extrudate, in particular a semi-finished tire product, comprises at least one extruder for producing the strip-shaped raw rubber extrudate, the above-described separating device for cutting the strip-shaped raw rubber extrudate, a material supplying device for supplying the extruder with starting materials for producing the raw rubber extrudate, and a storage location for depositing the portion of the strip-shaped raw rubber extrudate cut off in the separating device. In such an extrusion apparatus, the extruder, the separating device, and the storage location are connected by a conveying section, and the material supplying device and the storage location are arranged on the same side of the conveying section.

[0022] That is, the extrusion apparatus itself has a typical structure. However, the use of the above-described separating device in such an extrusion apparatus allows the extrusion product to be deposited in a storage location, such as a book cart, in the orientation shown in FIG. 1B, while maintaining the relatively compact structure of known extrusion apparatuses without the need to add additional equipment components.

[0023] The extrusion device may further comprise a turning device adapted to turn the cut-off portions over about their longitudinal axes before they are deposited in the storage location in the separating device. In this way, the extrusion device can also deposit the extruded product in the orientation shown in Figure 1D by using known turning devices and the separating device according to the invention.

[0024] A method for cutting a strip of deformable material using the above-described separating device includes the steps of: transporting the strip located on a conveying device through the separating device in a conveying direction; using a cutting cutter to cut the strip located on the conveying device along a cutting surface extending diagonally from above to below in the conveying direction; and, after cutting the strip, raising the first edge relative to the second edge until the leading edge of the uncut portion of the strip is conveyed beyond the second edge by the conveying device.

[0025] This method allows for the production of material strips with cut edges that allow for easy deposition of the material strips in the correct orientation, which previously could only be achieved with relatively high effort and equipment costs.

[0026] The invention will now be further described with reference to the drawings, which should be understood merely as an example and should not limit the claimed subject matter, the invention being defined solely by the subject matter of the independent claims. [Brief explanation of the drawings]

[0027] [Figure 1A] FIG. 10 shows a schematic diagram of one deposition possibility of a diagonally cut material strip. [Figure 1B] 10A-10C show schematic diagrams of other deposition possibilities for diagonally cut material strips. [Figure 1C] 10A-10C show schematic diagrams of further deposition possibilities for diagonally cut material strips. [Figure 1D] 10A-10C show schematic diagrams of further deposition possibilities for diagonally cut material strips. [Figure 2A] FIG. 2 is a diagram showing a schematic diagram of a disconnecting device. [Figure 2B] FIG. 2 is a diagram showing a schematic diagram of a disconnecting device. [Figure 3A] FIG. 10 is a diagram illustrating another disconnection device. [Figure 3B] FIG. 10 is a diagram illustrating another disconnection device. [Figure 4A] FIG. 10 is a diagram illustrating another disconnection device. [Figure 4B] FIG. 10 is a diagram illustrating another disconnection device. [Figure 5] FIG. 1 is a schematic diagram of an extrusion device. [Figure 6] 1 is a flow chart illustrating a method for cutting a deformable material. DETAILED DESCRIPTION OF THE INVENTION

[0028] 2A and 2B show a schematic representation of a cutting device 100 for cutting a strip 200 of deformable material. The strip 200 may be produced by any manufacturer and may consist of any deformable material. However, such material is preferably a rubber or crude rubber extrusion, and more preferably a tire semi-finished product, such as a tread strip or a sidewall strip. Furthermore, the strip 200 is preferably an endless product that is cut into portions of the desired length by the cutting device 100. However, the cutting device 100 can also be used to cut strips of material having a finite length.

[0029] The separating device 100 includes a conveying device 110 and a cutting device 120 .

[0030] The conveying device 110 serves to transport the strip located thereon in the conveying direction x through the separating device 100. The conveying device 110 has any known transport mechanism therefor, such as a conveyor belt, a roller belt and the like. A conveyor belt 119, shown purely by way of example in Figures 2A and 2B, transports the material strip 200 towards and away from the cutting device 120.

[0031] The cutting device 120 has a cutting cutter 122 by means of which the front portion of the material strip 200 can be cut off. For this purpose, the cutting cutter 122 can be guided through the strip 200 from above in the plane of its cutting blade. The cutting cutter 122 can have, for example, an electrically operated rotating cutting blade. However, in principle, other known configurations are also possible.

[0032] The term "cutting cutter" in this context should not only include an arrangement in which the material strip 200 is mechanically separated. In this sense, the cutting cutter can also be formed by a device for cutting using a laser or ultrasound. What is important here is that the cutting creates a defined surface, i.e. a surface that allows for a subsequent joining process, for example during tire manufacturing, by rolling the separated strip and gluing the front cut surface to the rear cut surface.

[0033] 2A, the cutting cutter 122 enters the strip 200 from the rear as viewed in the conveying direction x and cuts the strip 200 diagonally forward, resulting in a cut surface 210 that extends diagonally from top to bottom in the conveying direction x through the strip 200 located on the conveying device 110. That is, the uncut portion 230 of the strip 200 has a tip 220 on its lower side, i.e., on the side located on the conveying device 110.

[0034] In order to achieve complete separation of the strip 200 without damaging the conveying device 110, the conveying device 110 has a recess 112 in the region of the cutting device 120, which recess 112 can accommodate the cutting cutter 122 when cutting the strip 200. In the illustrated embodiment, the recess 112 extends transversely to the conveying direction x through the conveying device 110, thereby making it possible to separate the strip 200 over its entire width. The recess 112 can have a cross-sectional contour adapted to the inclination of the cutting cutter 122, as shown in FIG. 2A. In principle, however, the recess 112 can have any desired shape, as long as it is ensured that the cutting of the strip 200 can be carried out without damaging the conveying device 110.

[0035] Furthermore, the cutting cutter 122 can also cut through the strip 200 from below the recess 112. In such a case, the cutting cutter can be pulled back into the recess 112 again after cutting. In non-mechanical cutting, for example using a laser or ultrasound, the cutting can start from below or from above, and the energy source generating the laser or ultrasound is switched off after cutting.

[0036] As shown in Figures 2A and 2B, the conveying device 110 may have an area located between active conveying elements, in which a recess 112 is formed. In the example of Figures 2A and 2B, this area is located between two conveyor belts 119, which generate a forward drive for the material strip 200, while the intervening area itself does not generate a forward drive. In this way, the conveying device 110 may have an area made essentially of metal, for example, a metal block, in which the recess 112 is formed, for example, by a machining method. However, the recess 112 may also be formed by a gap between two conveying mechanisms located next to each other, for example, as a gap between two conveyor belts 119.

[0037] The recess 112 defines edges 114, 116 on the upper surface of the conveying device, which are located along the conveying path of the strip. The beginning of the recess 112 in the conveying direction x defines the first edge 114, and the end of the recess 112 defines the second edge 116. In this embodiment, the term "edge" should not only include the transition where two surfaces meet at a defined angle, such as occurs in a recess 112 milled into a metal block, but also the rounded area where the recess 112 begins and ends. Therefore, if the recess 112 is formed by a gap between the conveyor belts 119, then the end of the conveyor belt 119 should also be understood as an edge. The edge is thus in particular the transition of the upper surface or conveying surface of the conveying device 110 into the space formed by the recess 112.

[0038] As described above, if the material strip 200 is cut so that the remaining portion 230 of the strip 200 has a leading edge 220 that rests on the upper side of the conveying device 110, this leading edge may sink into the space formed by the recess 112 during the forward drive of the remaining portion 230 and be pushed into the second edge 116 or into the part of the conveying device 110 that is located below the second edge 116. This, on the one hand, causes deformation of the strip 200. On the other hand, if no manual correction is made, the strip 200 may be conveyed further in this way into the recess, which may then cause damage to the conveying device 110 and significant material losses.

[0039] To avoid such problems, the conveying device 110 is adapted to raise the first edge 114 relative to the second edge 116 after cutting the strip 200 until the leading edge 220 of the unsevered portion 230 of the strip 200 is conveyed beyond the second edge 116 by the conveying device 110.

[0040] By changing the height level of the first edge 114 above the level of the second edge 116, the distance over which the tip 220 can descend after it loses contact with the first edge 114 is increased. This allows sufficient time for the uncut portion 230 of the strip 200 to move beyond the second edge 116, so that the tip 220, even when lowered, can be positioned above the second edge 116 or even above the conveying device 110 in the conveying direction x.

[0041] Since the lowering of the leading edge 220 is typically performed at a speed that is lower than or equal to the conveying speed of the separating device 100, it is sufficient to raise the first edge 114 relative to the level of the second edge 116 by a distance that corresponds approximately to the width of the recess 112 in the conveying direction x. If the conveying speed is higher than the lowering speed, a smaller deviation may be sufficient.

[0042] The manner in which the relative offset between the first edge 114 and the second edge 116 in the conveying device 110 is obtained is optional in the present invention, so long as it ensures that the uncut portion 230 of the strip 200 does not become deformed or become stuck against or within the recess 112.

[0043] The manner in which the relative shift occurs can also be arbitrary, as long as the above-mentioned results are achieved. It is conceivable, for example, to use a control device such as a computer, processor, program, or the like that triggers the relative shift based on sensor data, such as camera data, movement data of the conveying device 110 and the cutting device 120, and the like. However, the shift can also be triggered purely mechanically, for example, by the movement of the conveying device 110, the material strip 200, or the cutting device 120 operating a lever, a rocker, or a switch that triggers the shift. Furthermore, the shift can also be automatically triggered structurally, always after the cutting process is completed.

[0044] After the leading edge 220 has passed the second edge 116, the conveying device is brought back to its starting position. This prevents excessive deformation of the material strip 200 due to height deviations in the conveying section and facilitates conveying. Furthermore, the return to the starting position allows for problem-free delivery of the material strip 200 past the recess 112 during the next cutting process.

[0045] 2A and 2B show, by way of example, one possibility for generating the offset between the first edge 114 and the second edge 116 discussed above. As shown in FIGS. 2A and 2B, the conveying device 110 is formed as a two-part block in the region of the cutting device 120, with both parts of the block defining a recess 112. The first edge 114 is thereby formed in the part located upstream in the conveying direction x, and the second edge 116 is formed in the part located downstream. The upstream part can be moved upward, for example hydraulically or electrically, thereby bringing the first edge 114 to a height level above the second edge 116.

[0046] 2A and 2B, the movement is performed obliquely upward in the conveying direction. This has the advantage that the recess 112 does not have to be bridged only by the forward movement of the uncut portion 230 of the strip 200, but is also partially closed by the movement of the first edge 114. In this way, the leading edge 220 of the uncut portion 230 can be reliably brought beyond the second edge 116 without deformation. After this movement, the divided block is brought back to its starting position for the further cutting process.

[0047] 2A and 2B are, of course, purely illustrative and not to scale. For example, the horizontal extension of the block arranged in the area of ​​the cutting device 120 is exaggerated for clarity of the drawings. Furthermore, both portions of the block may be movably connected to each other. Furthermore, both portions of the block may not be solid. Rather, both portions of the block may be formed as relatively thin first and second support surfaces 111, 113 movably held by a holding structure. The support surfaces 111, 113 may, in this embodiment, have movable elements, such as rollers or conveyor belts, that facilitate the forward movement of the strip 200 across the support surfaces 111, 113. Furthermore, in addition to or instead of raising the first edge 114, the second edge 116 may also be lowered.

[0048] 2A and 2B, it is important that the conveying device 110 is suitable for raising the first rest surface 111 in the region in front of the first edge 114 and / or for lowering the second rest surface 113 in the region behind the second edge 116. This ensures a reliable transition across the recess 112 despite the underlying tip 220 caused by the cut.

[0049] 2A and 2B, the first support surface is moved diagonally upwards to bridge the recess, but it may also be sufficient to achieve the raising of the first support surface 111 or the lowering of the second support surface 113 by a linear vertical movement of the support surfaces 111, 113.

[0050] Such an embodiment is shown diagrammatically and purely by way of example in Figures 3A and 3B. The structure of Figure 3A corresponds to that of Figure 2A. Instead of moving the front part of the block with the first resting surface 111, the downstream part of the block with the second resting surface 113 is moved linearly downwards. This also makes it possible to close the transition formed by the recess 112 and to ensure that the uncut part 230 of the strip 200 passes over the second edge 116 without deformation. Furthermore, a purely linear vertical movement simplifies the installation design.

[0051] 3A and 3B, in this embodiment it is advantageous if the downstream part of the conveying device 110 is arranged at a height level corresponding to the level of the lowered second edge 116, since in this case the cut-off part of the strip 200 can be conveyed away without further deformation.

[0052] In the example described above, the offset between the first edge 114 and the second edge 116 is produced by a linear movement of the two separated resting surfaces 111, 113. Alternatively or additionally, the offset can also be obtained by rotation of a member of the transport device 110, for example, that has the recess 112.

[0053] To this end, the conveying device 110 may have an axis 118 extending horizontally and perpendicularly to the conveying direction x and may be suitable for rotating one resting surface 115 of the strip 200 around the axis 118 in the conveying direction x so that the first edge 114 is raised relative to the second edge 116 in the area of ​​the recess 112.

[0054] A schematic example of such an arrangement is shown in Figures 4A and 4B. This arrangement substantially corresponds to the arrangement of Figures 2A to 3B, but instead of a two-part block, a rotatable element is provided around an axis 118. The rotatable element has a recess 112 located on a support surface 115. After the material strip 200 has been cut, the rotatable element is rotated in the conveying direction x. This causes the first edge 114 to rise relative to the second edge 116. At the same time, the uncut portion 230 of the strip 200 is pulled in the conveying direction x. The rotation around the axis 118 thereby supports the forward movement of the uncut portion 230. This allows the leading edge 220 of the uncut portion 230 to advance beyond 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.

[0055] 4A and 4B, the rotatable element is shown with a flat support surface 115 for simplicity's sake, but the support surface may also be curved. For example, the rotatable element may be formed as a roller with a slit forming the recess 112. Thus, the first edge 114 does not necessarily have to be located at the same height as the second edge 116 during the cutting process. The first edge 114 may be located below or above this level. This also applies in principle to the variants shown in FIGS. 2A and 3B.

[0056] Of course, it is clear that there are various other configurations for increasing the distance between the first edge 114 and the second edge 116 in addition to the configuration described above. Therefore, the configuration described above should not be understood as limiting. What is important is that after cutting the strip 200, the upstream portion 230 of the strip 200 that was not cut is raised relative to the cut portion. This prevents the tip 220 formed on the lower side of the upstream portion 230 from getting caught in the recess 112 for the cutting cutter 122.

[0057] The above-described separation device 100 can be advantageously used in an extrusion device 300 as shown diagrammatically in FIG.

[0058] The extrusion device 300 serves to produce strip-shaped raw rubber extrudates, in particular semi-finished tires, and includes at least one extruder 310 for producing the strip-shaped raw rubber extrudates, the above-described separating device 100 for cutting the strip-shaped raw rubber extrudates, a material supply device 320 for supplying starting materials for producing the raw rubber extrudates to the extruder 310, and a storage location 330 for depositing the portions of the strip-shaped raw rubber extrudates cut off in the separating device 100. The extruder 310, the separating device 100, and the storage location 330 are connected by a conveying section 340, and the material supply device 320 and the storage location 330 are arranged on the same side of the conveying section 340.

[0059] In other words, the structure of the extrusion device 300 shown in FIG. 5 corresponds to known structures where, for reasons of logistics and space utilization, it is desirable to supply the starting material for the extrusion and remove the cut strip on the same side of the installation.

[0060] However, by means of the separating device 100 described above, it is possible to deposit the cut material strips with their leading ends located in the conveying direction x and below the strip in a storage location without having to make complex adaptations to the known structure of the extrusion device 300. This allows further processing steps, which require such a storage location for optimized processing, to be realized without additional effort.

[0061] Optionally, the extrusion device 300 may have a known turning device 350, which is suitable for turning the cut-off portions around their longitudinal axis in the separating device 100 before depositing them in the storage location 330. This allows further orientation of the cut strips to be utilized within the framework of already known process operations, which in turn can serve to optimize further processing steps.

[0062] FIG. 6 shows a schematic flow chart of a method for cutting a strip of deformable material using a cutting device 100 as described above.

[0063] In S110, the strip 200 located on the conveying device 110 is conveyed through the separating device 100 along the conveying direction x.

[0064] In S120, the strip 200 is cut using the cutter 122 along a cutting plane 210 that extends obliquely from above to below through the strip 200 positioned on the conveying device 110 in the conveying direction x.

[0065] In S130, after cutting the strip 200, the first edge 114 is raised relative to the second edge 116 until the leading edge 220 of the unsevered portion 230 of the strip 200 is transported beyond the second edge 116 by the transport device 110.

[0066] This makes it possible to obtain the advantages mentioned above or to solve the problems mentioned at the beginning. [Explanation of symbols]

[0067] 100 Separation device 110 Conveyor 111 first placement surface 112 recess 113 Second mounting surface 114 first edge 115 Placement surface 116 Second Edge 118 axes 119 Conveyor Belt 120 Cutting device 122 Cutting cutter 200 Strips of deformable material 210 Cutting surface 220 Tip 230 Uncut portion of strip 300 Extrusion Device 310 Extruder 320 Material supply device 330 Storage Location 340 Transport Section 350 Turn-over device

Claims

1. A cutting device (100) for cutting a strip (200) of deformable material, comprising: a conveying device (110) for conveying the strip located on the conveying device (110) through the separating device (100) along a conveying direction (x); a cutting device (120) for cutting the strip (200) located on the conveying device (110) along a cutting surface (210) extending obliquely from above to below in the conveying direction (x) using a cutting cutter (122); the conveying device (110) has a recess (112) in the area of ​​the cutting device (120) for accommodating the cutting cutter (122) when cutting the strip (200); the beginning of the recess (112) defines a first edge (114) as viewed in the conveying direction (x) and the end of the recess defines a second edge (116) as viewed in the conveying direction (x), the conveying device (110) is adapted to raise the first edge (114) relative to the second edge (116) after cutting of the strip (200) until a leading edge (220) of an unsevered portion (230) of the strip (200) is conveyed beyond the second edge (116) by the conveying device (110); A disconnecting device (100).

2. 2. The separating device (100) according to claim 1, wherein the conveying device (110) is adapted to raise a first resting surface (111) of the strip (200) in a region in front of the first edge (114) and / or to lower a second resting surface (113) of the strip (200) in a region behind the second edge (116).

3. 3. The separating device (100) according to claim 2, wherein the conveying device (110) is adapted to realize the raising of the first supporting surface (111) or the lowering of the second supporting surface (113) by a linear vertical movement of the supporting surfaces (111, 113).

4. 2. The separating device (100) according to claim 1, wherein the conveying device (110) has an axis (118) extending horizontally and perpendicularly to the conveying direction (x) and is suitable for rotating about the axis (118) in the conveying direction (x) so as to raise the resting surface (115) of the strip (200) in the region of the recess (112) with the first edge (114) relative to the second edge (116).

5. The separating device (100) according to any one of claims 1 to 4, wherein the strip (200) of deformable material is a tire semi-finished product.

6. An extrusion device (300) for producing strip-shaped raw rubber extrudates, in particular semi-finished tires, comprising: at least one extruder (310) for producing said strip-shaped raw rubber extrudate; a separating device (100) according to any one of claims 1 to 5 for cutting the strip-shaped raw rubber extrudate; a material supply device (320) for supplying starting materials for producing the raw rubber extrudate to the extruder (310); a storage location (330) for depositing the strip-shaped raw rubber extrusion product cut off by the cutting device (100); The extruder (310), the separating device (100), and the storage location (330) are connected by a conveying section (340), and the material supply device (320) and the storage location (330) are arranged on the same side of the conveying section (340). Extrusion device (300).

7. 7. The extrusion device (300) of claim 6, further comprising an inversion device (350) adapted to invert the cut-off portion about its longitudinal axis in the separation device (100) before the cut-off portion is deposited in the storage location (330).

8. 10. A method for cutting a strip (200) of deformable material using a cutting device (100) according to claim 1, comprising: conveying the strip (200) located on the conveying device (110) through the separating device (100) along a conveying direction (x); using a cutting cutter (122) to cut the strip (200) located on the conveying device (110) along a cutting surface (210) extending obliquely from top to bottom in the conveying direction (x); raising the first edge (114) relative to the second edge (116) after cutting the strip (200) until the leading edge (220) of the unsevered portion (230) of the strip (200) is conveyed beyond the second edge (116) by the conveying device (110); The method has the following features.

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