Device and method for cutting a strip made of a deformable material
By designing a separation device including a conveying device and a cutting device, cutting the belt made of deformable material in the transmission direction without deforming the belt, the complexity and cost problems of cutting and storing the belt in the prior art are solved, and an efficient and simplified cutting and storage process is achieved.
Patent Information
- Application Number
- CN202380077271.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-11-16
- Filing Date
- 2023-10-30
- Publication Date
- 2025-06-20
AI Technical Summary
When cutting tape made of deformable materials, it is difficult to cut along the transmission direction without deforming the tape, and the cut tape needs to be flipped by 180°, resulting in increased system complexity, cost and space requirements.
A separation device is designed, including a conveying device and a cutting device, where the cutting blade passes obliquely downward through the belt along the conveying direction, and after cutting, the conveying device raises the first edge relative to the second edge, ensuring that the tip of the belt does not abut against the wall of the recess and reaches the upper side of the conveying device without deformation.
Cutting the deformable material tape along the transmission direction without deforming it, simplifying the storage process, reducing system complexity and cost, and optimizing space requirements.
Smart Images
Figure CN120187569A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a device and a method for cutting a strip made of a deformable material, in particular a tire semi-finished product made of a deformable material. Background Art
[0002] In current production, it is known to produce various strip-shaped deformable materials, for example, by pressing, extrusion or similar methods. Here, the production is often carried out in the form of an endless strip, that is, the strip is initially produced without interruption. An example of such production is the production of tire semi-finished products, such as the tread or side strip of a tire, in particular for motor vehicle tires, by means of an extruder.
[0003] For classification and further processing, such strips must be cut off from the deformable material. Generally, technically, the cutting must be made obliquely through the material, especially when the cutting surface is used as the joint position for connecting the cut strips, because this enlarges the joint area. Especially in tire production, the cut tire semi-finished products are formed into cylinders by bonding the two cutting surfaces of the semi-finished products together. Compared with a vertical cut, the oblique cut surface provides stronger adhesion of the cutting surface due to its larger area.
[0004] The two sides of the strip of material usually have different structures. For example, the tread semi-finished product of a motor vehicle tire has a profiled surface on one side, on which the tire pattern is formed, while the other side is formed for connection with the inner layer of the tire.
[0005] Since there are two possibilities for the path of the cutting surface, that is, cutting against the conveying direction or cutting in the conveying direction, and due to the different surfaces of the strip, there are differences between the two positioning positions of the strip. Therefore, for the above-mentioned cases of placing the finished cut strip of material, there are basically four possibilities. These are all shown in Figures 1A to 1D .
[0006] Figure 1A Shows the case of obliquely cutting the strip 20 against the conveying direction x. The upper side 22 (for example, the profiled side) points upward. The strip is located on its lower side 24. Therefore, when viewed in the conveying direction x, the upper side 22 extends further forward than the lower side 24.
[0007] Figure 1B Shows the case of obliquely cutting the strip 20 in the conveying direction x. The upper side 22 points upward again, and the strip 20 is located on its lower side 24. However, when viewed in the conveying direction x, the lower side 24 now extends further forward than the upper side 22.
[0008] In Figure 1C and 1D the strip 20 is as Figure 1A and 1BIt is not cut as in [reference], but then the strip 20 is flipped along its longitudinal axis before storage, i.e., the lower side 24 points upward and the upper side 22 points downward.
[0009] Simple technical implementations of these four storage possibilities currently only exist in Figure 1A and 1C the cases shown, i.e., cutting obliquely against the conveying direction. The reason is that when cutting in the conveying direction, the tip appears at the front of the lower side of the material strip. Especially shortly after cutting, due to abutting against the conveying mechanism in the cutting device, the tip may be deformed, whereby the material strip may become unusable, or correspondingly, material waste is increased.
[0010] On the other hand, if the cut strip is stored as shown in Figure 1B and 1D it is beneficial to optimize the further processing of the cut strip. However, currently, this is only possible with great effort. It is indeed possible to turn the cut material strip by 180° before storage. However, this is relatively technically laborious and costly. In addition, the space requirement of the system increases. Alternatively, the storage station can also be turned by 180°, such as the blade truck in the production of tire semi-finished products. However, this also increases the complexity, cost, and generally the space requirement of the system. Summary of the Invention
[0011] Therefore, the object of the present invention is to indicate a device and a method for cutting a strip made of deformable material, by which the above problems can be solved. In particular, by cutting the strip along the conveying direction without deforming it, it is also possible to achieve the Figure 1B and 1D shown storage positions.
[0012] This problem is solved by the subject matter of the independent claims.
[0013] A separating device for cutting a strip made of deformable material has a conveying device and a cutting device. The conveying device is used to convey the strip located on the conveying device through the separating device along the conveying direction. The cutting device is used to cut the strip along a cutting surface using a cutting blade, and the cutting blade obliquely penetrates the strip located on the conveying device from above downward along the conveying direction. The conveying device has a recess in the area of the cutting device to receive the cutting blade when cutting the strip, wherein when viewed along the conveying direction, the starting end of the recess defines a first edge, and when viewed along the conveying direction, the end of the recess defines a second edge. The conveying device is adapted to raise the first edge relative to the second edge after cutting the strip until the tip of the uncut part of the strip has been conveyed by the conveying device above the second edge.
[0014] Therefore, the separating device is constructed in a substantially known manner. A conveying device, such as a conveyor belt or a roller belt, transports a material belt, in particular an annular one, to a cutting device, in which a cutting blade, such as a rotary cutter, a laser blade or an ultrasonic blade, continuously separates a relatively front part of the material belt. Here, the cutting blade projects into a recess in the conveying device during the cutting process, and the recess can be formed as a groove or a channel extending transversely to the conveying direction. Here, in the surface of the conveying device, the recess forms a first edge at its starting end and a second edge at its end. In order to bring the non-separated part of the belt into position for further positioning, the non-separated part of the belt must be displaced above the recess.
[0015] However, compared with systems known per se, the cutting blade of the cutting device is arranged such that it forms a cutting surface that extends obliquely downwards from above along the conveying direction. Seen from the conveying direction, one side of the non-separated part of the belt located on the conveying device is more forward than the upper side of the belt.
[0016] If this non-separated part is displaced above the recess of the cutting device, there is a risk that it abuts against the second edge of the recess, because the deformable material of the belt sinks into the recess and is thus lower than the surface of the conveying device 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. Thus, it is ensured that the displaced tip of the belt does not abut against the wall of the recess, but reaches the upper side of the conveying device adjacent to the recess without being deformed. If the tip is brought above the second edge, the relative positions of the first edge and the second edge can be made equal again in order to create the same starting conditions for the next cut.
[0017] Here, the conveying device can be adapted to raise a first support surface of the belt in the area before the first edge, and / or to lower a second support surface of the belt in the area after the second edge. Thus, the change in the relative position is achieved by changing the height position of the support surfaces in front of and / or behind the recess. For example, in the area of the cutting device, the conveying device can be divided into two parts by the recess, such that the heights of the conveying device in front of and behind the recess can be changed independently of each other. Here, the height change can be achieved by, for example, a hydraulic actuator or an electric motor.
[0018] Here, the conveying device can be adapted to effect the raising of the first support surface or the corresponding lowering of the second support surface by a linear vertical movement of the support surface. For example, a hydraulic actuator can move the first support surface upwards or the second support surface downwards (or both).
[0019] However, the conveying device can also have an axis extending horizontally and perpendicular to the conveying direction, and can be adapted to rotate the support surface of the belt in the recessed area about this axis along the conveying direction, so that the first edge is raised relative to the second edge. Thus, the conveying device has, for example, a block rotatably mounted on the axis in the region of the cutting device, and the support surface and the recess are formed on the upper side of the block. When this block rotates out of the position where the support surfaces are at the same height along the conveying direction, the second edge drops more than the first edge. Thus, the displaced belt is prevented from abutting against the wall of the recess in a simple manner. In addition, the rotational movement along the conveying direction contributes to the further conveyance of the uncut portion of the belt.
[0020] The belt made of a deformable material can in particular be a tire semi-finished product, such as a tread or a side strip. Thus, the above advantages can be used in tire production.
[0021] An extrusion device for producing a strip-shaped natural rubber extrudate, which is in particular a tire semi-finished product, the extrusion device having at least one extruder for producing the strip-shaped natural rubber extrudate, a separating device for cutting the strip-shaped natural rubber extrudate as described above, a material feeder for supplying the starting material for producing the natural rubber extrudate to the extruder, and a storage place for storing the cut-off portions of the strip-shaped natural rubber extrudate in the separating device. The extruder, the separating device and the storage place are connected here by a conveying section, and the material feeder and the storage place are arranged on the same side of the conveying section.
[0022] Thus, the extrusion device has a structure that is typical per se. However, here, the use of the above-mentioned separating device enables the extrudate to be stored in the storage place, such as in a leaf truck, in the arrangement as Figure 1B shown, while the relatively compact structure known per se of the extrusion device can be retained without having to add additional system components.
[0023] In addition, the extrusion device can have a turning device that is adapted to turn the cut-off portion about the longitudinal axis of the cut-off portion before the cut-off portion in the separating device is stored in the storage place. Thus, by using a turning device known per se and the separating device according to the invention, the extrudate can also be stored in the arrangement as Figure 1D shown.
[0024] A method for cutting a strip made of deformable material by means of a separating device as described above includes: conveying the strip located on a conveying device in a conveying direction through the separating device; cutting the strip along a cutting surface by means of a cutting blade that obliquely penetrates downward from above the strip located on the conveying device in the conveying direction; and after cutting the strip, raising a first edge relative to a second edge until the tip of the uncut portion of the strip has been conveyed by the conveying device above the second edge.
[0025] This method allows for the production of strips of material with cutting edges that permit simple storage of the strips in an orientation that was previously only achievable with relatively great effort on the part of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The present invention will be further explained below with reference to the accompanying drawings. The description should be understood as being merely exemplary and not meant to limit the subject matter claimed. The present invention is defined only by the subject matter of the independent claims. The following drawings are shown.
[0027] Figures 1A to 1D is a schematic illustration of various storage possibilities for a strip of material that is cut obliquely;
[0028] Figure 2A and 2B is a schematic illustration of a separating device;
[0029] Figure 3A and 3B is a schematic illustration of another separating device;
[0030] Figure 4A and 4B is a schematic illustration of another separating device;
[0031] Figure 5 is a schematic illustration of an extrusion device; and
[0032] Figure 6 is a flow chart of a method for cutting deformable material. DETAILED DESCRIPTION
[0033] Figure 2A and 2B Schematically shown is a separating device 100 for cutting a strip 200 made of deformable material. Here, the strip 200 can come from any source and can consist of any deformable material. However, preferably, it relates to an extrudate made of rubber or natural rubber, and more preferably, a tire semi-finished product, such as a tread or a side strip. Additionally, the strip 200 preferably relates to an annular product that is cut in the separating device 100 into parts of a desired length. However, the separating device 100 can also be used for cutting strips of material with a limited length.
[0034] The separating device 100 has a conveying device 110 and a cutting device 120.
[0035] The conveying device 110 is used to transport the tape located on the conveying device 110 through the separating device 100 along the conveying direction x. For this purpose, the conveying device 100 has any conveying mechanism known per se, such as a conveyor belt, a roller belt, etc. In Figure 2A and 2B FIGS., the conveyor belt 119 is shown only as an example, which conveys the material tape 200 upward to the cutting device 120 and away from the cutting device 120.
[0036] The cutting device 120 has a cutting blade 122, through which the front part of the material tape 200 can be separated. For this purpose, the cutting blade 122 can be guided in the plane of its cutter from above through the tape 200. The cutting blade 122 can be provided with, for example, an electric rotary cutter. However, in principle, other known embodiments are also possible.
[0037] The term "cutting blade" here means not only embodiments in which the material tape 200 is mechanically separated. In this sense, the cutting blade can also be formed by a device for cutting by means of laser or ultrasonic waves. The decisive factor here is that a surface is produced by the cutting, which allows subsequent joining processes, such as the rolling of the cut tape and the joining of the front and rear cutting surfaces during tire production.
[0038] As Figure 2A shown, when viewed from the conveying direction x, the cutting blade 122 extends into the tape 200 from the rear and cuts obliquely forward through the tape 200. Thereby, a cutting surface 210 is produced, which obliquely extends downward from above in the conveying direction x through the tape 200 located on the conveying device 110. Therefore, the unseparated part 230 of the tape 200 has a tip 220 on its lower side, that is, the side located on the conveying device 110 has a tip 220.
[0039] In order to achieve complete separation of the tape 200 without damaging the conveying device 110, the conveying device 110 has a recess 112 in the area of the cutting device 120, and the recess 112 can receive the cutting blade 122 during the cutting of the tape 200. Here, the recess 112 extends transversely to the conveying direction x through the conveying device 110 so as to be able to completely separate the tape 200 across the entire width of the tape. As Figure 2A shown, the recess 112 can have a profile adapted to the inclination of the cutting blade 122. However, in principle, the recess 112 can have any shape as long as it ensures that the cutting of the tape 200 can be carried out without damaging the conveying device 110.
[0040] In addition, the cutting blade 122 can also emerge from the recess 112 and cut through the tape 200 from below. After cutting, the cutting blade can be retracted into the recess 112 again. In the case of non-mechanical cutting, such as by laser or ultrasound, the cutting can start from below or above, where the energy source generating the laser or ultrasound is switched off after cutting.
[0041] As Figure 2A and 2B shown, the conveying device 110 can have an area located between the active conveying elements, in which the recess 112 is formed. In Figure 2A and 2B the example, this area is located between two conveyor belts 119 that generate the driving force for the material tape 200, and no driving force is generated in the intermediate area itself. Therefore, the conveying device 110 can have an area made substantially of metal, such as a metal block, in which the recess 112 is formed, for example, by a machining process. However, the recess 112 can also be formed by a gap between two adjacent conveying mechanisms, such as a gap between two conveyor belts 119.
[0042] The recess 112 defines edges 114, 116 in the surface of the conveying device along the conveying path of the tape. Looking in the conveying direction x, the starting end of the recess 112 defines the first edge 114, and the end of the recess 112 defines the second edge 116. The term "edge" here includes not only the transition where two surfaces are adjacent to each other at a specific angle, for example, in the case of a recess 112 milled in a metal block, but also includes, for example, not only the origin but also the curves where the recess 112 starts and ends. For example, when the recess 112 is formed by a gap between the conveyor belts 119, the ends of the conveyor belts 119 are thus also understood as edges. Therefore, the edge is in particular the transition from the upper surface of the conveying device 110 or the corresponding conveying surface to the free space formed by the recess 112.
[0043] If the material tape 200 as described above is cut such that the remaining part 230 of the tape 200 has a tip 220 located on the upper side of the conveying device 110, there is a risk that during the advancement of the remaining part 230, this tip drops into the free space formed by the recess 112 and is pushed against the second edge 116 or against a part of the conveying device 110 located correspondingly below the second edge 116. On the one hand, this causes deformation of the tape 200. On the other hand, the tape 200 is thus further conveyed into the recess without manual correction, which can lead to damage to the conveying device 110 and significant loss of material.
[0044] To solve this problem, the conveying device 110 is adapted to raise the first edge 114 relative to the second edge 116 after the cutting tape 200 until the tip 220 of the uncut portion 230 of the tape 200 has been conveyed by the conveying device 110 above the second edge 116.
[0045] By changing the height level of the first edge 114 relative to the second edge 116, the section in which the tape 220 can drop after losing contact with the first edge 114 is increased. Thus, sufficient time is obtained to move the uncut portion 230 of the tape 200 to the second edge 116 such that the tip 220 also lies on the conveying device 110 when it drops on the second edge 116 or is further conveyed in the conveying direction x.
[0046] Since the drop of the tip 220 generally occurs at a speed less than or equal to the conveying speed of the separating device 100, it is sufficient to raise the first edge 114 relative to the second edge 116 by a section that roughly corresponds to the width of the recess 112 in the conveying direction x. If the conveying speed is higher than the dropping speed, a smaller amount of offset is also sufficient.
[0047] The manner in which the relative offset between the first edge 114 and the second edge 116 is achieved in the conveying device 110 is arbitrary here, as long as it is ensured that the uncut portion 230 of the tape 200 does not deform or remain jammed at or in the recess 112.
[0048] The manner in which the generation of the relative offset is triggered is also arbitrary, as long as the above result is achieved. Thus, it is conceivable, for example, to use a control device such as a computer, a processor, a program, etc., which triggers the generation of the relative offset based on sensor data such as camera data, movement data of the conveying device 110 and the cutting device 120, etc. However, the offset can also be triggered completely mechanically, for example, by moving the conveying device 110, the material tape 200 or the cutting device 120 to actuate a lever, a rocker or a switch, and then triggering the generation of the offset in turn. In addition, for structural reasons, the offset can always be automatically generated after the cutting process is completed.
[0049] After the tip 220 has passed the second edge 116, the conveying device is brought back to its starting position again. This prevents the material tape 200 from being overly deformed due to the height offset in the conveying section and facilitates the conveyance. In addition, by returning to the starting position, a problem-free transfer of the material tape 200 above the recess 112 can also be achieved in the next cutting process.
[0050] Figure 2A and 2BThe possibility of generating the offset discussed above between the first edge 114 and the second edge 116 is shown by way of example. As Figure 2A and 2B shown, the conveying device 110 is configured as a two-part block in the region of the cutting device 120, where the two parts of the block define the recess 112. Thus, the first edge 114 is formed on the part located upstream of the conveying direction x, while the second edge 116 is formed on the part located downstream of the conveying direction x. The upstream part can be moved upward, for example, hydraulically or electrically, so as to bring the first edge 114 to a height level higher than that of the second edge 116.
[0051] In Figure 2A and 2B 's example, the movement in the conveying direction is obliquely upward. This has the advantage that the recess 112 not only has to be bridged by the advancement of the uncut part 230 of the belt 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 above the second edge 116 without deformation. After this has occurred, the two-part block is brought back to its starting position for a further cutting process.
[0052] It goes without saying that Figure 2A and 2B here are merely exemplary and not to true scale. Thus, for example, for clarity, the horizontal extent of the block arranged in the region of the cutting device 120 is shown in an exaggerated manner. In addition, the two parts of the block can also be movably connected to each other. Moreover, the construction of the two parts of the block does not have to be solid. Instead, they can also be formed as relatively thin first support surface 111 and second support surface 113, which are movably held by a support structure. The support surfaces 111, 113 can also have movable elements here, such as rollers or conveyor belts, which facilitate the advancement of the belt 200 above the support surfaces 111, 113. In addition, as an alternative or in addition to raising the first edge 114, the second edge 116 can also be lowered.
[0053] For Figure 1A and 2B 's example, it is crucial that the conveying device 110 is adapted to raise the first support surface 111 in the region before the first edge 114 and / or lower the second support surface 113 in the region after the second edge 116. Thus, despite the cutting generating the tip 220 located below, a reliable transition above the recess 112 is achieved.
[0054] In Figure 2A and 2BIn the example, the first support surface is moved obliquely upward to bridge the recess. However, it is also sufficient to raise the first support surface 111 or, relatively, lower the second support surface 113 by a linear, vertical movement of the support surfaces 111, 113.
[0055] This is schematically and purely by way of example shown in Figure 3A and 3B . Figure 3A The structure of Figure 2A corresponds here to the structure of
[0056] Instead of the front part of the moving block and the first support surface 111, the part of the block located downstream and the second support surface 113 are moved linearly downward. Thus, the transition produced by the recess 112 can also be closed, and the uncut part 230 of the belt 200 can be safely brought above the second edge 116 without being deformed. Furthermore, a purely linear vertical movement can simplify the structure of the system.
[0056] As Figure 3A and 3B show, it may be advantageous if the downstream part of the conveying device 110 is arranged at a height level corresponding to the lowered second edge 116, because in this case the cut part of the belt 200 can be conveyed without further deformation.
[0057] In the above example, the offset between the first edge 114 and the second edge 116 is produced by a linear movement of two separate support surfaces 111, 113. Alternatively or additionally, the offset can also be achieved, for example, by a rotation of the components of the conveying device 110 that include the recess 112.
[0058] For this purpose, the conveying device 110 can have an axis 118 extending horizontally and perpendicular to the conveying direction x, and can be adapted to rotate the support surface 115 of the belt 200 about the axis 118 in the region of the recess 112 along the conveying direction x, such 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 Figure 4A and 4B . The structure basically corresponds to Figures 2A to 3BThe structure, however, has two part blocks replaced by elements rotatable about axis 118. The rotatable elements have recesses 112 in the support surface 115. After cutting through the material strip 200, the rotatable elements rotate in the conveying direction x. As a result, the first edge 114 is raised 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. Thus, the rotation about axis 118 contributes to the advancement of the uncut portion 230. Therefore, its tip 220 can reach above the second edge 116 without being deformed, and the strip 200 can then be positioned for the next cut. For this purpose, the rotatable elements rotate back to their starting position.
[0060] Although, for simplicity, in Figure 4A and 4B the rotatable elements are shown as having a planar support surface 115, the support surface can also be curved. For example, the rotatable elements can be configured as rollers with slits forming the recesses 112. Thus, during the cutting process, the first edge 114 does not necessarily have to be arranged at the height level of the second edge 116. The first edge 114 can also be below or above this level. This also applies in principle to Figures 2A to 3B the variant shown.
[0061] It goes without saying that, in addition to the above embodiments, there are a wide variety of variants for increasing the distance between the first edge 114 and the second edge 116. Therefore, the above embodiments should not be construed as restrictive. What is crucial is that after cutting the strip 200, the uncut portion 230 of the strip 200 located upstream is raised relative to the cut portion. This prevents the tip 220 formed under the upstream portion 230 from getting stuck in the recess 112 for the cutting blade 122.
[0062] As Figure 5 schematically shown, the separating device 100 as described above can be advantageously used in an extrusion device 300.
[0063] The extrusion device 300 is used for producing strip-shaped natural rubber extrudates, in particular tire semi-finished products, and has at least one extruder 310 for producing strip-shaped natural rubber extrudates, the separating device 100 as described above for cutting the strip-shaped natural rubber extrudates, a material feeder 320 for feeding the starting material for producing the natural rubber extrudates into the extruder 310, and a storage place 330 for storing the uncut portion of the strip-shaped natural rubber that has not been cut in the separating device 100. The extruder 310, the separating device 100, and the storage place 330 are connected by a conveying section 340, and the material feeder 320 and the storage place 330 are arranged on the same side of the conveying section 340.
[0064] Therefore,Figure 5 The extrusion device 300 shown corresponds in its structure to a structure known per se, in which, for reasons of logistics and space, the conveying of the starting material for the extrudate and the removal of the completed cut-off strip take place on the same side of the system.
[0065] However, with the above-described separating device 100, the cut material strip can be placed in a storage location with its tip in the conveying direction x and on the lower side of the strip, without the need to laboriously modify the structure of the extrusion device 300 known per se. Thus, further processing steps that require such storage space for optimized processing can be achieved without additional effort.
[0066] Optionally, the extrusion device 300 can also have a turning device 350 known per se, which is adapted to turn the cut-off part around the longitudinal axis of the cut-off part before the part cut off in the separating device 100 is stored in the storage space 340. Thus, in known processing operations, a further orientation of the cut-off strip can be achieved. This can also be used to optimize further processing steps.
[0067] Figure 6 A schematic flow chart of a method for cutting a strip made of deformable material using the separating device 100 described above is shown.
[0068] In S110, the strip 200 located on the conveying device 110 is conveyed through the separating device 100 along the conveying direction x.
[0069] In S120, the strip 200 is cut along the cutting surface 210 by means of a cutting blade 122, which obliquely penetrates the strip 200 located on the conveying device 110 from above in the conveying direction x.
[0070] In S130, after cutting the strip 200, the first edge 114 is raised relative to the second edge 116 until the tip 220 of the uncut part 230 of the strip 200 has been conveyed by the conveying device 110 above the second edge 116.
[0071] Thus, the above-mentioned advantages can be achieved, or the previously mentioned problems can be solved separately.
[0072] List of reference numerals:
[0073] 100 Separating device
[0074] 110 Conveying device
[0075] 111 First support surface
[0076] 112 Recess
[0077] 113 Second support surface
[0078] 114 First edge
[0079] 115 Support surface
[0080] 116 Second edge
[0081] 118 Axis
[0082] 119 Conveyor belt
[0083] 120 Cutting device
[0084] 122 Cutting blade
[0085] 200 Strip of deformable material
[0086] 210 Cutting surface
[0087] 220 Tip
[0088] 230 Uncut portion of the strip
[0089] 300 Extrusion device
[0090] 310 Extruder
[0091] 320 Material feeder
[0092] 330 Storage location
[0093] 340 Conveyor section
[0094] 350 Inverting device
Claims
1. A separating device (100) for cutting a strip (200) made of a deformable material, having: a conveying device (110) for conveying a strip located on the conveying device (110) in a conveying direction (x) through the separating device (100); and a cutting device (120) for cutting the strip (200) along a cutting surface (210) using a cutting blade (122), the cutting blade (122) obliquely passing downward from above through the strip (200) located on the conveying device (110) in the conveying direction (x); wherein the conveying 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); when viewed in the conveying direction (x), a starting end of the recess (112) defines a first edge (114), and when viewed in the conveying direction (x), an end of the recess defines a second edge (116); and the conveying device (110) is adapted to raise the first edge (114) relative to the second edge (116) after cutting the strip (200) until a tip (220) of an uncut portion (230) of the strip (200) has been conveyed by the conveying device (110) above the second edge (116).
2. The separating device (100) according to claim 1, wherein the conveying device (110) is adapted to raise a first support surface (111) of the strip (200) in a region before the first edge (114) and / or lower a second support surface (113) of the strip (200) in a region after the second edge (116).
3. The separating device (100) according to claim 2, wherein the conveying device (110) is adapted to effect the raising of the first support surface (111) or correspondingly the lowering of the second support surface (113) by a linear vertical movement of the support surfaces (111, 113).
4. The separating device (100) according to claim 1, wherein the conveying device (110) has an axis (118) extending horizontally and perpendicular to the conveying direction (x), and is adapted to rotate a support surface (115) of the strip (200) in the region of the recess (112) about the axis (118) in the conveying direction (x) such that the first edge (114) is raised relative to the second edge (116).
5. The separating device (100) according to one of the preceding claims, wherein the belt (200) of deformable material is a tire semi-finished product.
6. An extrusion device (300) for producing a strip of natural rubber extrudate, in particular a tire semi-finished product, the extrusion device (300) having: at least one extruder (310) for producing the strip of natural rubber extrudate; The separating device (100) according to any one of the preceding claims, which is for cutting the strip-shaped natural rubber extrudate; A material feeder (320), which is for feeding starting materials for producing the natural rubber extrudate to an extruder (310); and A storage location (330), which is for storing the parts of the strip-shaped natural rubber extrudate cut in the separating device (100); wherein the extruder (310), the separating device (100) and the storage location (330) are connected by a conveying section (340), and the material feeder (320) and the storage location (330) are arranged on the same side of the conveying section (340).
7. The extrusion device (300) according to claim 6, further comprising a turning device (350) adapted to turn the severed portion about the longitudinal axis of the severed portion before the severed portion severed in the separating device (100) is stored in the storage location (340).
8. A method for cutting a belt (200) made of a deformable material by means of the separating device (100) according to claim 1, comprising: conveying the belt (200) located on the conveying device (110) in a conveying direction (x) through the separating device (100); cutting the belt (200) along a cutting surface (210) by means of the cutting blade (122), the cutting blade (122) obliquely passing downward from above through the belt (200) located on the conveying device (110) in the conveying direction (x); and after cutting the belt (200), raising the first edge (114) relative to the second edge (116) until the tip (220) of the uncut portion (230) of the belt (200) has been conveyed by the conveying device (110) above the second edge (116).