Rolling device and rolling machine

Abstract

The utility model relates to a rolling device and a rolling machine, and relates to the technical field of rolling. The rolling device comprises a roller passing shaft and a rolling assembly. And the roller passing shaft is arranged on the roller press. The rolling assembly comprises a first shaft sleeve and a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are detachably installed on the roller passing shaft. The first shaft sleeve is provided with at least two sections, and the second shaft sleeve is arranged between the two sections of the first shaft sleeve. A gap is arranged between the first shaft sleeve and the second shaft sleeve, at least one gasket is arranged in the gap, and the outer diameter of the gasket is different from that of the first shaft sleeve and that of the second shaft sleeve. When the rolling device is used, not only can the blank area on the pole piece be effectively prevented from forming wrinkles, but also the extension degree of the normal material area part and the extension degree of the thinning area of the pole piece can be ensured to be consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rolling, in particular to a rolling device and a rolling machine. BACKGROUND

[0002] Due to the thickness of the material area part of the pole piece, which is much larger than the thickness of the tab part, when the pole piece is subjected to the rolling process, the material area part of the pole piece will be significantly stretched, while the tab part will not be deformed. At this time, the blank area between the material area part and the tab part will form wrinkles.

[0003] In order to prevent drum edges during pole piece coating, a thinning area is usually manufactured at the edge of the material area part. The thickness of the thinning area is smaller than that of the normal material area part. When the rolling process is performed, the stretching degree of the thinning area is also smaller than that of the normal material area part, thereby causing the stretching degree of the pole piece to be inconsistent and affecting the normal operation of the subsequent section.

[0004] In the related art, the tension parameter is usually adjusted to increase the outward force to improve the wrinkling condition of the blank area. However, frequent adjustment of the process parameter will have a certain impact on the battery. Alternatively, a certain thickness of Teflon tape is pasted on the tension roller of the wrinkle removing device corresponding to the position of the tab before and after rolling to raise the tab, and the tension roller is forced to stretch the tab part. However, the method of pasting Teflon tape cannot effectively stretch the thinning area, and in addition, accurate positioning cannot be achieved during pasting, which may affect normal rolling. CONTENT OF THE INVENTION

[0005] In order to at least solve some of the defects mentioned in the related art, the present application provides a rolling device and a rolling machine.

[0006] In order to achieve the above-mentioned purpose, the present application provides a rolling device for rolling a pole piece. The rolling device comprises a roller shaft and a rolling assembly. The roller shaft is installed on a rolling machine. The rolling assembly comprises a first shaft sleeve and a second shaft sleeve, both of which are detachably installed on the roller shaft; the first shaft sleeve is provided with at least two sections, and the second shaft sleeve is arranged between the two sections of the first shaft sleeve. A gap is provided between the first shaft sleeve and the second shaft sleeve, and at least one gasket is arranged in the gap, the outer diameter of the gasket being different from the outer diameter of the first shaft sleeve and the second shaft sleeve.

[0007] Further, one side surface of the gasket abuts against the end portion of the first shaft sleeve, and the side surface of the gasket away from the first shaft sleeve abuts against the end portion of the second shaft sleeve.

[0008] Further, the plurality of gaskets installed in the same gap are arranged in abutment with each other as a gasket group, one side of the gasket group abuts against the end of the first shaft sleeve, and the side of the gasket group away from the first shaft sleeve abuts against the end of the second shaft sleeve.

[0009] Further, the length of the first shaft sleeve is L1, and the length of the second shaft sleeve is L2, and L2>L1 is satisfied.

[0010] Further, the gasket comprises a base body and a cladding layer, the cladding layer is press-fitted on the outer surface of the base body and covers the base body. The material of the cladding layer is set as a polyurethane layer.

[0011] Further, the thickness of the polyurethane layer is L3, and 0.5mm≤L3≤3mm is satisfied. The elastic modulus of the polyurethane layer is E, and 5MPa≤E≤8MPa is satisfied.

[0012] Further, the materials of the first shaft sleeve and the second shaft sleeve are both set as aluminum alloy, and the aluminum alloy is subjected to solid solution treatment and artificial aging treatment.

[0013] Further, the inner surfaces of the first shaft sleeve and the second shaft sleeve are both provided with first fixing members, and the over roller shaft is provided with second fixing members, and the first fixing members can be fixed relative to the second fixing members.

[0014] Further, the first fixing members are set as spline grooves, and the second fixing members are set as splines, and the splines can be installed in interference fit in the spline grooves. The spline grooves and the splines are both arranged in extension along the axial direction of the over roller shaft.

[0015] The application also provides a roll press comprising a machine body and the roll press device in any one of the above embodiments, and the over roller shaft is installed on the roll press.

[0016] Through the above technical solution, when the roll press device of the application is used to roll the pole piece, the first shaft sleeve, the second shaft sleeve and the gasket are installed on the over roller shaft, and the gasket is arranged in abutment between the first shaft sleeve and the second shaft sleeve, so that the pole piece can be rolled. When rolling, the first shaft sleeve and the second shaft sleeve correspond to the material area part of the pole piece, and the gasket corresponds to the tab part of the pole piece. Since the outer diameter of the first shaft sleeve and the second shaft sleeve is small, and the outer diameter of the gasket is large, the material area part of the pole piece is less stretched, the tab part of the pole piece is more stretched, and the stretched states of the two parts tend to be consistent, so as to prevent the creases in the blank area where the material area part and the tab part contact.

[0017] When the pole piece is coated, the first shaft sleeve and the second shaft sleeve correspond to the normal material area part on the pole piece, and the gasket corresponds to the thinned area, so that the extension degree of the normal material area part and the thinned area is consistent, and the subsequent process is ensured to be normal.

[0018] The roller pressing device of the present application can not only effectively prevent the blank area on the pole piece from forming wrinkles, but also ensure that the extension degree of the normal material area part and the thinned area of the pole piece is consistent. In addition, for the pole lug part or the thinned area with different widths or thicknesses, the present application can select gaskets with different outer diameters, or gaskets with different widths, or set multiple gaskets to meet the actual needs. The gasket is convenient to replace and accurate in positioning.

[0019] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 The structure schematic diagram of the roller pressing device of the present application is provided from a perspective.

[0022] FIG.

[0023] 100-over roller shaft; 200-roller pressing assembly; 210-first shaft sleeve; 220-second shaft sleeve; 230-gasket; 310-material area part; 320-foil. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "inner", "outer" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The embodiment provides a rolling device to solve the problems that the blank area of the pole piece is prone to wrinkle and the thinning area is difficult to expand normally in the related art.

[0028] Please refer to Figure 1 A rolling device is used for rolling a pole piece. The rolling device comprises a roller shaft 100 and a rolling assembly 200. The roller shaft 100 is installed on a rolling machine. The rolling assembly 200 comprises a first shaft sleeve 210 and a second shaft sleeve 220, and the first shaft sleeve 210 and the second shaft sleeve 220 are detachably installed on the roller shaft 100. The first shaft sleeve 210 is provided with at least two sections, and the second shaft sleeve 220 is arranged between the two sections of the first shaft sleeve 210. A gap is arranged between the first shaft sleeve 210 and the second shaft sleeve 220, and at least one gasket 230 is arranged in the gap. The outer diameter of the gasket 230 is different from the outer diameter of the first shaft sleeve 210 and the second shaft sleeve 220.

[0029] Specifically, when the rolling device is used, the roller shaft 100 is installed on the rolling machine at a suitable position, and the first shaft sleeve 210 and the second shaft sleeve 220 are installed on the roller shaft 100, and the gasket 230 abuts between the first shaft sleeve 210 and the second shaft sleeve 220.

[0030] In the process of rolling the pole piece, the pole piece is placed in a proper position so that the first shaft sleeve 210 and the second shaft sleeve 220 can correspond to the material area part 310 on the pole piece, and the gasket 230 can correspond to the tab part of the pole piece. Because the outer diameters of the first shaft sleeve 210 and the second shaft sleeve 220 are different from the outer diameter of the gasket 230, the extension degrees of the material area part 310 and the tab part with different thicknesses tend to be consistent, thereby preventing the white space between the material area part 310 and the tab part from appearing due to the different extension degrees of the two parts. At the same time, the foil 320 in the pole piece is also not damaged.

[0031] Similarly, in the process of coating the pole piece, because the normal material area part 310 of the pole piece is provided with a thinning area with a smaller thickness at the edge, in the process of rolling, the first shaft sleeve 210 and the second shaft sleeve 220 correspond to the normal material area part 310 of the pole piece, and the gasket 230 corresponds to the thinning area of the pole piece. Because the outer diameter of the gasket 230 is larger than the outer diameters of the first shaft sleeve 210 and the second shaft sleeve 220, it is ensured that the thinning area can also be effectively extended in the process of rolling.

[0032] It should be noted that the rolling device of the embodiment can select the first shaft sleeve 210, the second shaft sleeve 220 and the gasket 230 with different outer diameters or different widths according to the actual situation of the pole piece in actual use, so as to meet the rolling needs of the pole piece. Of course, a plurality of gaskets 230 can also be arranged between the first shaft sleeve 210 and the second shaft sleeve 220 to meet the rolling needs of the tab part or the thinning area with different widths.

[0033] Compared with the treatment mode of sticking a certain thickness of Teflon tape on the proper position of the roller shaft 100 in the related art, the rolling device of the embodiment rolls and extends the tab part or the thinning area through the gasket 230, without the need of frequently adjusting the outward force and other process parameters of the rolling machine, and without affecting the battery. The rigidity of the gasket 230 is better than that of the Teflon tape, and the controllability of the thickness is also better, so that the tab part or the thinning area can be effectively extended. Furthermore, the gasket 230 of the embodiment is positioned through the abutment of the first shaft sleeve 210 and the second shaft sleeve 220, which is more accurate than the manual sticking of the Teflon tape, and the normal rolling is not affected due to the improper sticking of the Teflon tape.

[0034] In one embodiment, an example is as follows: Figure 1As shown, one side of the gasket 230 abuts the end of the first shaft sleeve 210, and the side of the gasket 230 away from the first shaft sleeve 210 abuts the end of the second shaft sleeve 220. The gasket 230 is clamped between the first shaft sleeve 210 and the second shaft sleeve 220, and the two ends are in contact with the end faces thereof, respectively, to form a stable axial limiting structure. Thus, the problem of positional deviation caused by human operation error of the traditional pasted Teflon tape is avoided, and the repeatability and consistency of the installation position of the gasket 230 are greatly improved.

[0035] During the rolling process, if the gasket 230 deviates or rotates, the uniformity of the extension of the corresponding area on the pole piece, such as the tab or the thinning area, will be affected. By rigidly clamping and fixing the gasket 230 by the two end sleeves, the sliding or rotation of the gasket 230 on the roller shaft 100 can be effectively prevented, and the stability of the rolling quality is ensured.

[0036] In addition, the gasket 230 can be installed by clamping with only two shaft sleeves, without the need for screws, buckles or other auxiliary fixing structures; the structure is simple, easy to understand and operate, and suitable for manual or automatic rapid assembly. In actual production, different gaskets 230 with different outer diameters or widths may be needed to replace the tabs or thinning areas with different widths or thicknesses. The structure of the present embodiment can enable the gasket 230 to be quickly disassembled and replaced, thereby improving the flexibility and adaptability of the present embodiment.

[0037] In one embodiment, as shown in the example, Figure 1 As shown, the plurality of gaskets 230 installed in the same gap are arranged in abutment with each other to form a gasket group, one side of the gasket group abuts the end of the first shaft sleeve 210, and the side of the gasket group away from the first shaft sleeve 210 abuts the end of the second shaft sleeve 220. The plurality of gaskets 230 abut each other to form a "rigid combination", which is not prone to misalignment or rotation during installation. Compared with the gasket 230 placed loosely, the axial position is more stable and the positioning is more accurate, which is conducive to improving the rolling consistency of the corresponding area of the pole piece. During the rolling process, if the plurality of gaskets 230 do not form an integral structure, local deformation or sliding may occur due to uneven external force. The gasket group structure can enhance the overall deformation resistance, and ensure that each gasket 230 is uniformly stressed and moves consistently.

[0038] For tabs or thinning areas of different widths, the number or thickness of the gaskets 230 in the gasket group can be adjusted to achieve adaptive adjustment. At the same time, the installation method remains unchanged, thereby improving the versatility and adaptability of the equipment.

[0039] Of course, it can be understood that in the present embodiment, the way of splicing the plurality of gaskets 230 into a gasket group is not limited, and the plurality of gaskets 230 can be connected and fixed by any existing device or existing method, or can be directly fixed by the extrusion of the first shaft sleeve 210 and the second shaft sleeve 220, as long as the requirements of the present embodiment can be met.

[0040] In one embodiment, as shown in the example, Figure 1 The length of the first sleeve 210 is L1 and the length of the second sleeve 220 is L2, which satisfies L2>L1. The longer second sleeve 220 can better cover the surface of the roller shaft 100 and enhance the axial limiting capability of the gasket set or other related components. During installation, the second sleeve 220 can also be used as a reference to improve the centering and assembly consistency of the overall assembly.

[0041] The first sleeve 210 is shorter and may not have sufficient support, which can easily cause slight deformation or deviation when subjected to external force or high-speed operation. The second sleeve 220 is longer and can provide better support and alignment reference, thereby improving the stability during the rolling process.

[0042] The pole piece usually includes multiple functional areas: normal material area, thinning area, tab area, etc. By controlling the length of the first sleeve 210 and the second sleeve 220, it can be ensured that the gasket 230 can accurately correspond to the thinning area or the tab area, while the first sleeve 210 and the second sleeve 220 are used to cover the normal material area, realizing differentiated rolling control of different areas.

[0043] In one embodiment, as shown in the example, the gasket 230 includes a base body and a cladding layer, the cladding layer is press-fit on the outer surface of the base body and clads the base body. The material of the cladding layer is set as a polyurethane layer. Polyurethane is a high-elasticity material, and its surface will deform when subjected to pressure, thereby better fitting the surface of the pole piece. In this way, the gasket 230 can more evenly transmit pressure when corresponding to the tab or the thinning area, avoiding pressure concentration or local overpressure caused by rigid contact.

[0044] There is a thickness difference between the material area part 310 of the pole piece and the tab part and the thinning area. Using a polyurethane cladding gasket 230 with a certain elasticity can alleviate the problem of uneven extension caused by rigid differences. It helps to reduce the risk of wrinkles in the white space and improve the quality of pole piece forming.

[0045] Furthermore, compared with the metal sleeve or gasket 230, polyurethane has a lower friction coefficient and good anti-scratching performance, which can effectively prevent scratches, powder loss and other damage to the coating layer of the pole piece during the rolling process, and ensure the consistency and electrochemical performance of the battery cell.

[0046] In an embodiment, the thickness of the polyurethane layer is L3, which satisfies: 0.5mm≤L3≤3mm. The elastic modulus of the polyurethane layer is E, which satisfies: 5MPa≤E≤8MPa. The thickness of the polyurethane layer is limited so that the thickness of the gasket 230 can meet the rolling requirements of the embodiment. In addition, L3≥0.5mm can ensure that the polyurethane layer has sufficient elastic buffering capacity and can effectively absorb local pressure fluctuations during rolling to improve the consistency of the extension between different thickness regions of the pole piece. While L3≤3mm can avoid excessive deformation, spring lag or positioning deviation caused by the polyurethane layer being too thick, thereby affecting the rolling precision and structural stability. Within this thickness range, the polyurethane coating layer can be formed by mature casting, molding or hot pressing forming process, which is convenient for mass production; at the same time, it is also convenient for positioning and clamping during assembly, and will not cause installation difficulty due to excessive thickness.

[0047] Correspondingly, the elastic modulus E of the polyurethane layer is ≥5MPa, which can ensure that the polyurethane layer has certain rigidity and bearing capacity and is not prone to excessive compression deformation during rolling, ensuring uniform pressure transmission and structural stability. While E≤8MPa can make the material maintain good elasticity and spring performance, and can quickly recover to its original state after rolling, avoiding permanent deformation or fatigue failure caused by long-term compression. The polyurethane material with moderate elastic modulus can not only buffer the pressure and avoid damage to the pole piece coating, but also will not affect the rolling precision due to being too soft.

[0048] In an embodiment, the material of the first shaft sleeve 210 and the second shaft sleeve 220 is set to be aluminum alloy, and the aluminum alloy is subjected to solid solution treatment and artificial aging treatment. The solid solution treatment and artificial aging treatment is an important heat treatment method for strengthening aluminum alloy. Through this process, alloying elements such as magnesium and silicon in the aluminum alloy will form a dispersed distribution of precipitates in the aluminum matrix, thereby significantly improving the tensile strength and surface hardness of the material. In an embodiment, the specific material of the aluminum alloy is set to be 6061-T6 aluminum alloy, which is subjected to solid solution treatment and artificial aging treatment, and the tensile strength can reach about 310 MPa, and also has certain plasticity and fatigue resistance, which can withstand repeated loading pressure during rolling without being prone to fracture or crack propagation, ensuring the service life of the first shaft sleeve 210 and the second shaft sleeve 220.

[0049] It should be noted that although the aluminum alloy after solid solution treatment and artificial aging treatment has high strength, it still has good cutting and drilling performance, and can realize high-precision machining of inner holes, outer circles, key grooves and other features, meeting the precise fitting requirements between the shaft sleeve and the roller shaft 100. At the same time, it also meets the precise positioning requirements of the gasket 230 by the first shaft sleeve 210 and the second shaft sleeve 220 in the embodiment, thereby improving the rationality and practicality of the embodiment.

[0050] In an embodiment, the inner surfaces of the first shaft sleeve 210 and the second shaft sleeve 220 are provided with first fixing members, and the over roller shaft 100 is provided with second fixing members, the first fixing members being capable of being fixed relative to the second fixing members. In a high-speed rolling or high-pressure working condition, if the shaft sleeve is only relied on interference fit or screw fastening, there is a risk of slipping, deviation or even falling off. After the first fixing members are used in cooperation with the second fixing members, a rigid limiting structure is formed, which effectively prevents the shaft sleeve from rotating or moving, thereby improving the reliability of the embodiment.

[0051] In use, once the shaft sleeve deviates, the position of the gasket set will change, affecting the accurate coverage of the tab area or the thinning area. By locking the position of the shaft sleeve through the fixing members, the axial positioning accuracy of the entire rolling assembly 200 is ensured, thereby improving the consistency and quality stability of the battery pole piece.

[0052] In the embodiment, the fixing members can be in any form of keyway, key, buckle, pin hole, positioning pin, etc., as long as they can realize tool-free quick locking and release, so as to adapt to the production scene in which different specifications of shaft sleeves may need to be frequently replaced to adapt to various pole piece structures in the embodiment.

[0053] In an embodiment, the first fixing members are provided as spline grooves, and the second fixing members are provided as splines, the splines being capable of interference fit installation in the spline grooves. The spline grooves and the splines are provided along the axial direction of the over roller shaft 100. The spline engagement structure of the spline and the spline groove can accurately transmit torque and prevent the shaft sleeve from rotating. Compared with traditional methods such as flat keys or pins, the spline has more engagement surfaces, more stable positioning, larger contact area and more uniform stress. The spline structure can also simultaneously bear large radial, axial and torsional loads. In the process of high-speed rolling, even if a large pressure or impact force is applied, the synchronous rotation between the shaft sleeve and the over roller shaft 100 can still be maintained, avoiding slipping or deviation.

[0054] The spline structure allows the shaft sleeve to be repeatedly disassembled and replaced without affecting the connection accuracy under the premise of reasonable design tolerance. In addition, the spline and the spline groove can be provided along the axial direction to ensure that after the first shaft sleeve 210 and the second shaft sleeve 220 are axially displaced due to the adjustment of the width of the gasket 230, they can still be effectively fixed on the over roller shaft 100.

[0055] The embodiment also provides a rolling machine, which comprises a machine body and the rolling device in any one of the above embodiments, and the over roller shaft 100 is installed on the rolling machine.

[0056] The rolling machine of the embodiment comprises the rolling device in any one of the above embodiments, and thus has all the beneficial effects of the rolling device, which will not be described here again.

[0057] It should be noted that the features of the embodiments in the present application can be combined with each other in the case of no conflict.

[0058] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roll press device for roll pressing an electrode tab, characterized by, The roller pressing device comprises: a passing roller shaft (100) mounted on a roller press; a roller pressing assembly (200) comprising a first shaft sleeve (210) and a second shaft sleeve (220), both of which are detachably mounted on the passing roller shaft (100); the first shaft sleeve (210) is provided with at least two sections, and the second shaft sleeve (220) is arranged between the two sections of the first shaft sleeve (210); a gap is arranged between the first shaft sleeve (210) and the second shaft sleeve (220), and at least one gasket (230) is arranged in the gap, the outer diameter of the gasket (230) being different from the outer diameter of the first shaft sleeve (210) and the second shaft sleeve (220).

2. The roller press device of claim 1, wherein, One side surface of the gasket (230) abuts against the end of the first shaft sleeve (210), and the side surface of the gasket (230) away from the first shaft sleeve (210) abuts against the end of the second shaft sleeve (220).

3. The roller press apparatus of claim 1, wherein, A plurality of gaskets (230) arranged in the same gap abut against each other to form a gasket group, one side surface of the gasket group abuts against the end of the first shaft sleeve (210), and the side surface of the gasket group away from the first shaft sleeve (210) abuts against the end of the second shaft sleeve (220).

4. The roller press apparatus of claim 1, wherein The length of the first shaft sleeve (210) is L1, and the length of the second shaft sleeve (220) is L2, satisfying L2>L1.

5. The roller press apparatus of claim 1, wherein The gasket (230) comprises a base body and a cladding layer, the cladding layer being press-fitted on the outer surface of the base body and covering the base body; The material of the cladding layer is set as a polyurethane layer.

6. The roller press apparatus of claim 5, wherein, The thickness of the polyurethane layer is L3, satisfying 0.5mm≤L3≤3mm; The elastic modulus of the polyurethane layer is E, satisfying 5MPa≤E≤8MPa.

7. The roller press apparatus of claim 1, wherein The materials of the first shaft sleeve (210) and the second shaft sleeve (220) are both set as aluminum alloy, and the aluminum alloy is subjected to solid solution treatment and artificial aging treatment.

8. The roller press apparatus of claim 1, wherein, The inner surfaces of the first shaft sleeve (210) and the second shaft sleeve (220) are both provided with first fixing members, and the passing roller shaft (100) is provided with second fixing members, the first fixing members being capable of being fixed relative to the second fixing members.

9. The roller press apparatus of claim 8, wherein, The first fixing members are set as spline grooves, and the second fixing members are set as splines, the splines being capable of being interference-fitted into the spline grooves; The spline grooves and the splines both extend along the axial direction of the passing roller shaft (100).

10. A roll press characterized by, The roller pressing device is mounted on the roller press.

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