A hydrogen energy electrode plate production line

Abstract

The application discloses a hydrogen energy polar plate production line, and relates to the technical field of hydrogen energy polar plate preparation.The hydrogen energy polar plate production line comprises a hydrogen energy polar plate conveying mechanism, the hydrogen energy polar plate conveying mechanism comprises a rack, the rack is provided with a material pressing positioning assembly and a material pulling assembly; the material pressing positioning assembly comprises a first material receiving plate, a first polar plate pressing plate and a first electric control lifting piece; the material pulling assembly comprises a motor lead screw assembly, the sliding block of the motor lead screw assembly is connected with a mounting bracket and a second material receiving plate, the material pulling assembly further comprises a second polar plate pressing plate and a second electric control lifting piece mounted on the mounting bracket, the material pressing positioning assembly is pressed / cancelled, the material pulling assembly is pressed / cancelled, and the first working state and the second working state of the motor lead screw assembly are pressed / cancelled, so that the hydrogen energy polar plate can be pulled and pressed, and problems, such as material belt deviation caused by traditional roller feeding, scratches generated by roller rotation on the material belt, material belt bending deformation or warping caused by roller pressing, and the like, can be avoided.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy electrode preparation technology, specifically a hydrogen energy electrode production line. Background Technology

[0002] The hydrogen energy electrode plate production line is a front-end supporting equipment for the hydrogen energy electrode plate production line (in conjunction with the rear press and robotic production line). The product is a metal strip with a thickness of 0.1mm and a width of about 500mm.

[0003] In hydrogen energy electrode plate production lines, the traditional material conveying method is to use roller feeders. Roller feeders are prone to material belt deviation and damage to the material edges. The rotation of surface rollers can easily cause scratches on the material belt, as well as bending, deformation, or warping of the material belt due to roller pressure.

[0004] Chinese invention application No. 202310237970.2, entitled "A Production Process for Metal Electrode Plates of Hydrogen Energy Batteries," proposes that each station's feeding and pulling mechanisms include clamps for holding the material strip. The clamps at both locations reciprocate synchronously to coordinate with the opening and closing of the corresponding molds, controlling the conveying and stopping of the material strip. This pulling method effectively avoids problems caused by traditional roller feeding, such as material strip misalignment, scratches from roller rotation, and bending or warping of the material strip due to roller pressure. However, it lacks a specific implementation structure and requires further improvement. Summary of the Invention

[0005] To overcome the shortcomings mentioned above, the present invention aims to provide a technical solution that can solve the above problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydrogen energy electrode plate production line, comprising a hydrogen energy electrode plate conveying mechanism, wherein the hydrogen energy electrode plate conveying mechanism includes a frame, and a pressing and positioning component and a pulling component are disposed on the frame; the pressing and positioning component includes a first supporting plate mounted on the frame, a first electrode plate pressing plate located above the first supporting plate, and a first electrically controlled lifting component mounted on the frame; the lifting end of the first electrically controlled lifting component is connected to the first electrode plate pressing plate, for driving the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first supporting plate, and for driving the first electrode plate pressing plate upward to release the pressing; the pulling component includes components mounted on the frame. The motor screw assembly has a mounting bracket and a second support plate connected to its slider. The material pulling assembly also includes a second electrode plate pressure plate located above the second support plate, and a second electrically controlled lifting component mounted on the mounting bracket. The lifting end of the second electrically controlled lifting component is connected to the second electrode plate pressure plate, used to drive the second electrode plate pressure plate downward to press the hydrogen energy electrode plate onto the second support plate, and to drive the second electrode plate pressure plate upward to release the pressing. The motor screw assembly has a first working state for moving the second support plate toward a direction closer to the first support plate, and a second working state for moving the second support plate away from the first support plate.

[0007] As a further aspect of the present invention: a pre-pressing module is provided on the first electrode plate pressing plate; the first electrically controlled lifting component drives the first electrode plate pressing plate to rise and fall to form a first height point, a second height point, and a third height point. The first height point is the lowest height of the first electrode plate pressing plate when it is pressing downward, and the third height point is the highest height of the first electrode plate pressing plate when it is rising upward; when the first electrode plate pressing plate is higher than the first height point and lower than the second height point, the pre-pressing module has a pre-compression state for pressing the hydrogen energy electrode plate tightly onto the first support plate; when the first electrode plate pressing plate is not lower than the second height point, the pre-pressing module correspondingly cancels the compression.

[0008] As a further aspect of the present invention: the pre-pressing module includes a pre-pressing plate located below the first electrode plate pressing plate, a vertically arranged guide post connected to the top side of the pre-pressing plate, a corresponding vertically penetrating guide sliding hole on the first electrode plate pressing plate, the guide post passing upward through the guide sliding hole and connected to an anti-detachment block that cooperates with the top side of the first electrode plate pressing plate, and an elastic pressing member provided between the first electrode plate pressing plate and the pre-pressing plate.

[0009] As a further aspect of the present invention: the elastic pressing member is a compression spring sleeved on the guide post.

[0010] As a further aspect of the present invention: the hydrogen energy electrode plate conveying mechanism further includes a controller, a first position sensor, a second position sensor, and a third position sensor. The controller is used to control the first and second electrically controlled lifting components based on the signals from the first, second, and third position sensors. The first position sensor is used to provide the position signal of the second support plate being furthest from the first support plate, the third position sensor is used to provide the position signal of the second support plate being closest to the first support plate, and the second position sensor is used to provide the position signal of the second support plate being at a specified position between the furthest and closest positions.

[0011] As a further aspect of the present invention: before the motor screw assembly is in the second working state, the second electrically controlled lifting component first drives the second electrode plate pressing plate upward to release the clamping, and the first electrically controlled lifting component drives the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first support plate; when the motor screw assembly is in the second working state and the position signal from the second position sensor is obtained, the controller controls the first electrically controlled lifting component to drive the first electrode plate pressing plate to a position height higher than the first height point and lower than the second height point; when the motor screw assembly is in the second working state and the position signal from the first position sensor is obtained, the controller controls the second electrically controlled lifting component to drive the second electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the second support plate, and the controller also controls the first electrically controlled lifting component to drive the first electrode plate pressing plate to a position height not lower than the second height point.

[0012] As a further aspect of the present invention: when the motor lead screw assembly is in the first working state and receives the position signal from the third position sensor, the controller controls the first electrically controlled lifting component to drive the first electrode plate pressing plate downward to press the hydrogen energy electrode plate firmly onto the first support plate.

[0013] As a further aspect of the present invention: when the motor lead screw assembly is in the first working state and receives the position signal from the third position sensor, the controller first controls the first electrically controlled lifting component to move the first electrode plate pressing plate to a position height higher than the first position point and lower than the second position point, then controls the second electrically controlled lifting component to move the second electrode plate pressing plate upward to cancel the pressing, and controls the first electrically controlled lifting component to move the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first support plate.

[0014] As a further aspect of the present invention: a cutting machine is provided at the rear end of the hydrogen energy electrode plate conveying mechanism, and the controller is also used to control the cutting action of the cutting machine; before the motor screw assembly is in the second working state and before the second position sensor receives the positioning signal, the first electrode plate pressure plate is already at the first height point; after the first electrode plate pressure plate is at the first height point, the controller controls the cutting machine to cut the hydrogen energy electrode plate, and the cutting action is completed before the motor screw assembly is in the second working state and before the second position sensor receives the positioning signal. As a further aspect of the present invention: the first supporting plate and / or the first electrode plate pressing plate and / or the second supporting plate and / or the second electrode plate pressing plate and / or the pre-pressing plate are PU-coated sheets.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (i) By pressing / unpressing the material pulling assembly, unpressing / pressing the material positioning assembly, and the first and second working states of the motor screw assembly, the hydrogen energy electrode plate can be pressed and pulled, which can better avoid problems such as material strip deviation, scratches caused by roller rotation on the material strip, and bending or warping of the material strip caused by traditional roller feeding. (ii) By setting the controller, the first position sensor, the second position sensor, the third position sensor and their control methods, while ensuring that the hydrogen energy electrode plate is not prone to displacement, the running time of the feeding mechanism of this hydrogen energy electrode plate can be effectively reduced, which is more conducive to saving energy and improving feeding efficiency.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the hydrogen energy electrode plate conveying mechanism in this invention; Figure 3 This is a schematic diagram of the internal structure of the hydrogen energy electrode plate delivery mechanism in this invention.

[0019] The reference numerals in the attached figures are explained as follows: Hydrogen energy electrode plate conveying mechanism-1, unwinding rack-2, loading trolley-3, cutting machine-4, conveyor belt-5. Frame-11, Material clamping and positioning assembly-12, Material pulling assembly-13, Pre-pressing module-14, Controller-15, First position sensor-16, Second position sensor-17, Third position sensor-18 First material support plate-121, first electrode plate pressure plate-122, first electrically controlled lifting component-123. Motor lead screw assembly-131, mounting bracket-132, second support plate-133, second pole plate pressure plate-134, second electric control lifting component-135. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 A hydrogen energy electrode plate production line includes a hydrogen energy electrode plate conveying mechanism 1. The front end of the hydrogen energy electrode plate conveying mechanism 1 can be equipped with an unwinding rack 2, the unwinding rack 2 is equipped with a loading trolley 3, and the rear end can be equipped with a cutting machine 4. Behind the cutting machine 4, a conveyor belt 5 and a vacuum suction cup type material transfer robot can be equipped. Preferably, the adhesive strip in the middle of the inner surface of the conveyor belt 5 is arched, so that the cut hydrogen energy electrode plate pieces will not stick to the conveyor belt 5. The vacuum suction cup type material transfer robot can more easily move them to the next station and is less likely to damage the hydrogen energy electrode plate pieces.

[0022] Please refer to details. Figure 1-3 In this embodiment of the invention, the hydrogen energy electrode plate conveying mechanism 1 includes a frame 11, on which a pressing and positioning component 12 and a pulling component 13 are provided.

[0023] The pressing and positioning assembly 12 includes a first support plate 121 mounted on the frame 11, a first electrode plate pressing plate 122 located above the first support plate 121, and a first electrically controlled lifting component 123 mounted on the frame 11. The lifting end of the first electrically controlled lifting component 123 is connected to the first electrode plate pressing plate 122, and is used to drive the first electrode plate pressing plate 122 downward to press the hydrogen energy electrode plate onto the first support plate 121, and to drive the first electrode plate pressing plate 122 upward to release the pressing.

[0024] The material pulling assembly 13 includes a motor screw assembly 131 mounted on the frame 11. A mounting frame 132 and a second support plate 133 are connected to the slider of the motor screw assembly 131. The material pulling assembly 13 also includes a second electrode plate pressing plate 134 located above the second support plate 133, and a second electrically controlled lifting component 135 mounted on the mounting frame 132. The lifting end of the second electrically controlled lifting component 135 is connected to the second electrode plate pressing plate 134, and is used to drive the second electrode plate pressing plate 134 downward to press the hydrogen energy electrode plate onto the second support plate 133, and to drive the second electrode plate pressing plate 134 upward to release the pressing.

[0025] The motor lead screw assembly 131 has a first working state for moving the second support plate 133 toward the direction of approaching the first support plate 121, and a second working state for moving the second support plate 133 toward the direction of away from the first support plate 121.

[0026] By adjusting the clamping / unclamping of the feeding assembly, adjusting the clamping / clamping of the pressure positioning assembly, and adjusting the first and second working states of the motor screw assembly, the hydrogen energy electrode plate can be clamped and pulled for feeding. This effectively avoids problems caused by traditional roller feeding, such as material belt deviation, scratches caused by roller rotation on the material belt, and bending or warping of the material belt by roller pressure.

[0027] Preferably, a pre-pressing module 14 is provided on the first electrode plate pressing plate 122; the first electrically controlled lifting component 123 drives the first electrode plate pressing plate 122 to rise and fall to form a first height point, a second height point, and a third height point. The first height point is the lowest height of the first electrode plate pressing plate 122 when it is pressing downward, and the third height point is the highest height of the first electrode plate pressing plate 122 when it is rising upward; when the first electrode plate pressing plate 122 is higher than the first height point and lower than the second height point (the second height point is higher than the first height point and lower than the third height point), the pre-pressing module 14 has a pre-pressing state for pressing the hydrogen energy electrode plate tightly onto the first support plate 121; when the first electrode plate pressing plate 122 is not lower than the second height point, the pre-pressing module 14 correspondingly cancels the pressing.

[0028] The hydrogen energy electrode plate conveying mechanism 1 also includes a controller 15, a first position sensor 16, a second position sensor 17, and a third position sensor 18. The controller 15 is used to control the first electrically controlled lifting member 123 and the second electrically controlled lifting member 135 according to the signals from the first position sensor 16, the second position sensor 17, and the third position sensor 18. The first position sensor 16 is used to provide the position signal of the second support plate 133 at the farthest distance from the first support plate 121, the third position sensor 18 is used to provide the position signal of the second support plate 133 at the closest distance from the first support plate 121, and the second position sensor 17 is used to provide the position signal of the second support plate 133 at a specified position between the farthest and the closest positions.

[0029] Before the motor lead screw assembly 131 is in the second working state, the first electronically controlled lifting component 123 first drives the first electrode plate pressing plate 122 downward to press the hydrogen energy electrode plate onto the first supporting plate 121, and the second electronically controlled lifting component 135 drives the second electrode plate pressing plate 134 upward to release the pressing.

[0030] When the motor lead screw assembly 131 is in the second working state and receives the position signal from the second position sensor 17, the controller 15 controls the first electric lifting component 123 to drive the first electrode plate pressure plate 122 to a position height higher than the first height point and lower than the second height point.

[0031] When the motor lead screw assembly 11 is in the second working state and receives the position signal from the first position sensor 16, the controller 15 controls the second electronically controlled lifting component 135 to drive the second electrode plate pressing plate 134 downward to press the hydrogen energy electrode plate onto the second supporting plate 133. The controller 15 also controls the first electronically controlled lifting component 123 to drive the first electrode plate pressing plate 122 to a position height not lower than the second height point.

[0032] After the second electrically controlled lifting component 135 drives the second electrode plate pressing plate 134 downward to press the hydrogen energy electrode plate onto the second supporting plate 133, and the first electrically controlled lifting component 123 drives the first electrode plate pressing plate 122 to a position height not lower than the second height point (preferably at the third height point), the motor screw assembly 131 begins to operate in the first working state.

[0033] When the motor lead screw assembly 131 is in the first working state and receives the position signal from the third position sensor 18, the controller 15 controls the first electronically controlled lifting component 123 to drive the first electrode plate pressing plate 122 downward to press the hydrogen energy electrode plate onto the first supporting plate 121.

[0034] Furthermore, when the motor screw assembly 131 is in the first working state and receives the position signal from the third position sensor 18, the controller 15 first controls the first electrically controlled lifting component 123 to move the first electrode plate pressing plate 122 to a position height higher than the first position point and lower than the second position point, so as to pre-press the hydrogen energy electrode plate after delivery; then controls the second electrically controlled lifting component 135 to move the second electrode plate pressing plate 122 upward to cancel the pressing, and controls the first electrically controlled lifting component 123 to move the first electrode plate pressing plate 122 downward to further press the hydrogen energy electrode plate onto the first support plate 121, until it reaches the position height of the first height point.

[0035] By configuring the controller, the first position sensor, the second position sensor, the third position sensor, and their control methods, and combining them with the pre-pressurization module, the feeding time of this hydrogen energy electrode conveying mechanism can be effectively reduced while ensuring that the hydrogen energy electrode plate is not prone to displacement, thus saving energy and improving feeding efficiency.

[0036] Preferably, when the back end is equipped with a cutting machine 4, the controller 15 is also used to control the cutting action of the cutting machine.

[0037] When the motor lead screw assembly 131 is in the first working state and receives the position signal from the third position sensor 18, the controller 15 first controls the first electrically controlled lifting component 123 to move the first electrode plate pressing plate 122 to a position height higher than the first position point and lower than the second position point, so as to pre-press the hydrogen energy electrode plate after delivery; then it controls the second electrically controlled lifting component 135 to move the second electrode plate pressing plate 122 upward to release the pressing, and controls the first electrically controlled lifting component 123 to move the first electrode plate pressing plate 122 downward to further press the hydrogen energy electrode plate against the first support plate 12. 1. The feeder moves up to the first height point. Before the motor screw assembly 131 is in its second working state and receives the arrival signal from the second position sensor 17, the first electrode plate pressure plate 122 is already at the first height point. After the first electrode plate pressure plate 122 reaches the first height point, the controller controls the cutting machine to cut the hydrogen energy electrode plate. The cutting action is completed before the motor screw assembly 131 is in its second working state and receives the arrival signal from the second position sensor 17, resulting in a hydrogen energy electrode plate of the required length. This method effectively improves overall feeding efficiency when dealing with offset effects caused only by gravity or inertia. It also provides greater clamping force to prevent offset during cutting when dealing with cutting actions with significant offset effects. Through improvements to the control method, the feeding process can be controlled differently for different offset influencing factors, resulting in better feeding efficiency and anti-offset performance.

[0038] The first electrically controlled lifting component is preferably a motor lead screw slider, hydraulic cylinder, or electric push rod, and the second electrically controlled lifting component is preferably an electrically controlled pneumatic cylinder.

[0039] In this embodiment of the invention, the pre-pressing module includes a pre-pressing plate located below the first electrode plate pressing plate. A vertically arranged guide post is connected to the top side of the pre-pressing plate. A corresponding vertically penetrating guide sliding hole is provided on the first electrode plate pressing plate. The guide post passes upward through the guide sliding hole and is connected to an anti-detachment block that cooperates with the top side of the first electrode plate pressing plate. An elastic pressing member is provided between the first electrode plate pressing plate and the pre-pressing plate.

[0040] Preferably, the elastic pressing member is a compression spring sleeved on the guide post.

[0041] The first support plate and / or the first electrode plate pressing plate and / or the second support plate and / or the second electrode plate pressing plate and / or the pre-pressing plate are preferably covered with PU adhesive plates, which are less likely to damage the surface of the hydrogen energy electrode plate.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydrogen energy electrode plate production line, comprising a hydrogen energy electrode plate conveying mechanism, characterized in that, The hydrogen energy electrode plate conveying mechanism includes a frame, on which a pressing and positioning component and a pulling component are provided; The material pressing and positioning assembly includes a first material support plate installed on the frame, a first electrode plate pressing plate located above the first material support plate, and a first electrically controlled lifting component installed on the frame; The lifting end of the first electrically controlled lifting component is connected to the first electrode plate pressing plate, which is used to drive the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first support plate, and to drive the first electrode plate pressing plate upward to release the pressing. The material pulling assembly includes a motor screw assembly mounted on a frame. A mounting frame and a second material support plate are connected to the slider of the motor screw assembly. The material pulling assembly also includes a second electrode plate pressing plate located above the second material support plate, and a second electrically controlled lifting component mounted on the mounting frame. The lifting end of the second electrically controlled lifting component is connected to the second electrode plate pressing plate, and is used to drive the second electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the second material support plate, and to drive the second electrode plate pressing plate upward to release the pressing. The motor lead screw assembly has a first working state for moving the second support plate toward a direction closer to the first support plate, and a second working state for moving the second support plate toward a direction farther from the first support plate. The first electrode plate pressure plate is equipped with a pre-pressing module; The pre-pressing module includes a pre-pressing plate located below the first electrode plate pressure plate, and an elastic pressing element is provided between the first electrode plate pressure plate and the pre-pressing plate; The first electrically controlled lifting component drives the first electrode plate pressure plate to rise and fall, forming a first height point, a second height point, and a third height point. The first height point is the lowest height when the first electrode plate pressure plate is pressing downward, and the third height point is the highest height when the first electrode plate pressure plate is raised upward. When the first electrode plate pressure plate is higher than the first height point and lower than the second height point, the pre-pressing module has a pre-pressing state for pressing the hydrogen energy electrode plate tightly onto the first support plate; when the first electrode plate pressure plate is not lower than the second height point, the pre-pressing module correspondingly cancels the pressing. The hydrogen energy electrode plate conveying mechanism also includes a controller, a first position sensor, a second position sensor, and a third position sensor. The controller is used to control the first and second electrically controlled lifting components based on the signals from the first, second, and third position sensors. The first position sensor is used to provide the position signal of the second bearing plate being furthest from the first bearing plate, the third position sensor is used to provide the position signal of the second bearing plate being closest to the first bearing plate, and the second position sensor is used to provide the position signal of the second bearing plate being at a specified position between the furthest position and the closest position. Before the motor screw assembly is in the second working state, the second electronically controlled lifting component first drives the second electrode plate pressing plate upward to cancel the pressing, and the first electronically controlled lifting component drives the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first supporting plate. When the motor lead screw assembly is in the second working state and receives the position signal from the second position sensor, the controller controls the first electronically controlled lifting component to move the first pole plate pressure plate to a position height higher than the first height point and lower than the second height point. When the motor lead screw assembly is in the second working state and receives the position signal from the first position sensor, the controller controls the second electronically controlled lifting component to drive the second electrode plate pressing plate downward to press the hydrogen energy electrode plate firmly onto the second support plate. The controller also controls the first electronically controlled lifting component to drive the first electrode plate pressing plate to a position height not lower than the second height point. When the motor lead screw assembly is in the first working state and receives the position signal from the third position sensor, the controller first controls the first electrically controlled lifting component to move the first electrode plate pressing plate to a position height higher than the first position point and lower than the second position point. Then, it controls the second electrically controlled lifting component to move the second electrode plate pressing plate upward to cancel the pressing, and controls the first electrically controlled lifting component to move the first electrode plate pressing plate downward to press the hydrogen energy electrode plate onto the first support plate.

2. The hydrogen energy electrode plate production line according to claim 1, characterized in that, A vertically arranged guide post is connected to the top side of the pre-pressing plate, and a corresponding vertically penetrating guide sliding hole is provided on the first electrode plate pressing plate. The guide post passes upward through the guide sliding hole and is connected to an anti-detachment block that cooperates with the top side of the first electrode plate pressing plate.

3. A hydrogen energy electrode production line according to claim 2, characterized in that, The elastic top pressure component is a compression spring sleeved on the guide post.

4. A hydrogen energy electrode production line according to claim 1, characterized in that, The hydrogen energy electrode plate conveying mechanism is equipped with a cutting machine at the rear end, and the controller is also used to control the cutting action of the cutting machine. Before the motor screw assembly is in the second working state and receives the position signal from the second position sensor, the first electrode plate pressure plate is already at the first height point. After the first electrode plate pressure plate is at the first height point, the controller controls the cutting machine to cut the hydrogen energy electrode plate, and the cutting action is completed before the motor screw assembly is in the second working state and receives the position signal from the second position sensor.

5. A hydrogen energy electrode production line according to claim 1, characterized in that, The first support plate and / or the first electrode plate pressure plate and / or the second support plate and / or the second electrode plate pressure plate and / or the pre-press plate are PU-coated sheets.

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