Conductive bipolar plate production line and conductive bipolar plate production method

Abstract

The invention discloses a conductive bipolar plate production line and a production method of a conductive bipolar plate. The conductive bipolar plate production line comprises a feeding mechanism, an extruding mechanism, a forming mechanism and a finished product collecting mechanism which are sequentially arranged from upstream to downstream; the feeding mechanism comprises an internal mixer, an elevator and a double-screw feeder; the extrusion mechanism comprises an extruder and an extrusion die; the forming mechanism comprises a rolling forming machine, a roller temperature controller, a cooling bracket, an edge cutting device and a traction machine, the roller temperature controller is communicated with a plurality of rollers of the rolling forming machine so as to adjust the temperature of the rollers, and the edge cutting device is arranged on the cooling bracket; the finished product collecting mechanism comprises a plate shearing machine, a conveyor and a stacking table. According to the electric bipolar plate production line, continuous production of the electric bipolar plate is achieved through the production method of the electric bipolar plate, the production efficiency is improved, and the high-yield requirement of the electric bipolar plate is met.

Description

Technical Field

[0001] This application relates to the technical field of conductive bipolar plate production equipment, and in particular to a conductive bipolar plate production line and a production method of conductive bipolar plates. Background Art

[0002] Graphite carbon black conductive bipolar plates are the mainstream of domestic bipolar plate applications due to their high conductivity, strong chemical and thermal stability, and corrosion resistance. Graphite is a porous brittle material with low strength and high brittleness, which cannot meet the airtightness requirements of bipolar plates. It needs to be repeatedly impregnated and carbonized to make a non-porous graphite plate. The non-porous graphite plate is generally prepared from carbon powder, graphite powder, and graphitized resin at a high temperature of 2500°C. This process requires strict temperature increase. Therefore, the production cycle is long and the cost is high. In addition, due to the evaporation of impurities after graphitization, new pores may appear, resulting in leakage of PEMFC, thereby reducing the concentration of reaction gases and further reducing the risk of stack performance. Therefore, it is necessary to impregnate the graphite plate to reduce its pores and improve its surface quality. Currently, the most widely used is the non-porous graphite plate after repeated impregnation; another type is the molded graphite plate. First, a mixture of graphite powder and resin is prepared, and then the mixed material and the mold are pretreated. Using the melting temperature of the polymer and a certain pressure, the powder material flows in the mold and fills the entire cavity. After curing and demolding, a bipolar plate is obtained. If the binder is a thermosetting material, it generally only takes a few minutes to cure and demold. If the binder is a thermoplastic material, the mold needs to be cooled to a temperature below the melting point of the binder for demolding. Therefore, the production is discontinuous and the efficiency is low. Currently, the market demand for graphite bipolar plates is large, but there are problems such as voids, cost, and long processing time. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a high-yield conductive bipolar plate production line and a production method of conductive bipolar plates.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a conductive bipolar plate production line, comprising a feeding mechanism, an extrusion mechanism, a molding mechanism and a finished product collecting mechanism arranged in sequence from upstream to downstream; the feeding mechanism comprises an internal mixer, an elevator and a twin-screw feeder, the elevator is installed between the internal mixer and the twin-screw feeder to transport the material from the internal mixer to the twin-screw feeder; the extrusion mechanism comprises an extruder and an extrusion die, the extruder has a feed port for inputting the material and a discharge port for outputting the material, the feed port of the extruder is connected to the twin-screw feeder The extruder is connected to the extrusion die; the forming mechanism comprises a roll forming machine, a roll temperature controller, a cooling bracket, a trimming device and a traction machine, the roll forming machine, the cooling bracket and the traction machine are arranged in sequence from upstream to downstream, the roll temperature controller is connected to the multiple rollers of the roll forming machine to adjust the temperature of the multiple rollers, and the trimming device is arranged on the cooling bracket; the finished product collection mechanism comprises a shearing machine, a conveyor and a stacking table, and the conveyor is arranged between the shearing machine and the stacking table to convey the plate sheared by the shearing machine to the stacking table.

[0005] In the above technical solution, it is further preferred that the elevator is a bucket elevator, which includes a lifting track extending from the discharge port of the internal mixer to the feed port of the twin-screw feeder, a hopper slidably set on the lifting track, and a lifting drive assembly driving the hopper to move along the lifting track, and the discharge port of the internal mixer is located at the lower side of the feed port of the twin-screw feeder.

[0006] In the above technical solution, it is further preferred that the twin-screw feeder is a conical twin-screw feeder, which comprises a feeding barrel and a pair of conical screws arranged opposite to each other, and the pair of conical screws can be rotatably arranged around their own axis in the feeding barrel.

[0007] In the above technical solution, it is further preferred that the extruder further comprises an extruder barrel and an extrusion screw rotatably disposed in the extruder barrel, and the extruder barrel is provided with a plurality of temperature regulating modules equidistantly arranged along the longitudinal direction.

[0008] In the above technical solution, it is further preferred that the roll forming machine further includes an adjusting component, and the adjusting component is drivingly connected to the plurality of rollers to adjust the gap between two adjacent rollers.

[0009] In the above technical solution, further preferably, the roll temperature controller includes a plurality of cooling paths and a plurality of heating paths communicated with the plurality of rollers, a cooling component is provided in each of the cooling paths, and a heating component is provided in each of the heating paths.

[0010] In the above technical solution, further preferably, the cooling bracket includes a support frame connected between the roll forming machine and the tractor, and a plurality of guide rollers rotatably connected to the support frame. The plurality of guide rollers are sequentially arranged on the support frame from upstream to downstream, and each of the guide rollers extends in the transverse direction; the support frame includes a first bracket section connected to the roll forming machine and a second bracket section connected to the tractor, and the first bracket section is slidably connected to the second bracket section.

[0011] In the above technical solution, further preferably, the edge trimming device is arranged on the first bracket section. The edge trimming device includes at least one cutting assembly movable in the transverse direction. The cutting assembly includes a blade for cutting the sheet in the longitudinal direction. An included angle is formed between the blade and the sheet, and the cutting assembly is configured to be able to adjust the included angle.

[0012] In the above technical solution, further preferably, the shearing machine includes a cutter for cutting the sheet in the left-right direction, a lifting motor for driving the cutter to move in the up-down direction, a length meter for measuring the length of the sheet, and a controller signal-connected to the lifting motor and the length meter. The controller is configured to control the operation of the lifting motor according to the measurement result of the length meter.

[0013] To achieve the above object, the present application also provides a technical solution: a production method of a conductive bipolar plate, including the following steps: S1, the feeding mechanism receives the material, the internal mixer mixes and preliminarily melts the material, and the twin-screw feeder receives the uniformly mixed material and outputs the material to the extruder; S2, the extruder receives the material, heats and plasticizes the material, the heated and plasticized material is extruded, and is extruded into a sheet at the die orifice of the extrusion die; S3, the sheet extruded from the extrusion die is preliminarily cooled and shaped by a roll forming machine; S4, the preliminarily cooled and shaped sheet is conveyed on the cooling bracket by the traction force provided by the tractor and is cooled and shaped, and then the excess edge material is cut off by the edge trimming device and is sliced; S5, the shearing machine cuts the sheet into a fixed length to form a plate; S6, the conveyor conveys the plate to the stacking table, and the plates are stacked on the stacking table.

[0014] The present application has the following beneficial effects compared with the prior art: The electric bipolar plate production line of the present application realizes the continuous production of conductive bipolar plates through the production method of conductive bipolar plates, improves production efficiency, and meets the high-yield demand for conductive bipolar plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The front view of a conductive bipolar plate production line provided by an embodiment of the present application; Figure 2 is Figure 1 the top view of the conductive bipolar plate production line in Figure 3 is Figure 1 the schematic structural view of the feeding mechanism in Figure 4 is Figure 1 the schematic structural view of the extrusion mechanism in Figure 5 is Figure 1 the schematic structural view of the forming mechanism in Figure 6 is Figure 5 the schematic view of the mechanism of the edge trimming device in

[0016] Wherein: 100, conductive bipolar plate production line; 10, feeding mechanism; 1, internal mixer; 101, discharge port; 2, elevator; 21, lifting track; 22, hopper; 23, lifting drive assembly; 3, twin-screw feeder; 301, feed port; 31, feeder barrel; 20, extrusion mechanism; 4, extruder; 401, feed port; 402, discharge port; 41, extruder barrel; 43, temperature adjustment module; 5, extrusion die; 30, forming mechanism; 6, roll forming machine; 61, roller; 62, adjustment assembly; 7, roller temperature controller; 8, cooling bracket; 81, support frame; 811, first bracket section; 812, second bracket section; 82, guide roller; 9, edge trimming device; 91, cutting assembly; 911, blade; 11, tractor; 111, rubber roller; 112, pressing cylinder; 40, finished product collection mechanism; 12, guillotine shear; 13, conveyor; 14, stacking table. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To describe in detail the technical content, structural features, achieved objectives and effects of the application, the technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, structures and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment.

[0018] Hereinafter, terms such as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0019] The "front", "rear", "upper", and "lower" described in the present application are in accordance with the attached Figure 1 Regarding the front, rear, upper, and lower described above, the "left" and "right" described in the present application are in accordance with the attached Figure 2 The left and right described above; the longitudinal direction described in the present application is Figure 1 the front-rear direction shown, and the transverse direction described in the present application is Figure 2 the left-right direction shown.

[0020] In the present application, unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected through an intermediate medium.

[0021] The embodiments of the present application provide a conductive bipolar plate production line, and this conductive bipolar plate production line 100 is used for the production of graphite carbon black conductive bipolar plates. The sheet material is extruded and formed after being mixed and melted with carbon black and PE materials, and the sheet materials formed by the carbon black and PE materials are all conveyed from upstream to downstream. Such as Figure 1 、 2As shown, the conductive bipolar plate production line 100 includes a feeding mechanism 10, an extrusion mechanism 20, a forming mechanism 30, and a finished product collection mechanism 40 arranged in sequence from upstream to downstream. The feeding mechanism 10 is used to mix carbon black and PE materials evenly, preliminarily melt the mixed materials, and forcibly transport the mixed materials to the extrusion mechanism 20. The extrusion mechanism 20 fully melts and plasticizes the mixed materials and extrudes the fully plasticized mixed materials into sheets. The forming mechanism 30 receives and transports the sheets output by the extrusion mechanism 20 to cool and form the sheets. The finished product collection mechanism 40 cuts the formed sheets into plates and collects and stacks the formed plates.

[0022] As Figure 1-3 shown, the feeding mechanism 10 includes a mixer 1, a hoist 2, and a twin-screw feeder 3. The mixer 1 is used to mix carbon black and PE materials and preliminarily melt the mixed materials. The discharge port 101 of the mixer 1 is located below the feed port 301 of the twin-screw feeder 3. The hoist 2 is installed between the mixer 1 and the twin-screw feeder 3 to transport the mixed materials output from the discharge port 101 of the mixer 1 to the feed port 301 of the twin-screw feeder 3. The hoist 2 is a bucket elevator. The hoist 2 includes a lifting track 21 extending from the discharge port 101 of the mixer 1 to the feed port 301 of the twin-screw feeder 3, a hopper 22 slidably arranged on the lifting track 21, and a lifting drive assembly 23 for driving the hopper 22 to move along the lifting track 21. The hopper 22 receives the mixed materials output by the mixer 1 and is driven by the lifting drive assembly 23 to move along the lifting track 21 to transport the mixed materials to the feed port 301 of the twin-screw feeder 3 and pour the mixed materials into the feed port 301 of the twin-screw feeder 3. The twin-screw feeder 3 is a conical twin-screw feeder. The twin-screw feeder 3 includes a feeder barrel 31 and a pair of oppositely arranged conical screws. The pair of conical screws are rotatably arranged in the feeder barrel 31 around their own axis. Threads extending along the axis of the conical screws are arranged on each conical screw. When the pair of conical screws rotate, the threads transport the mixed materials forward to forcibly transport the mixed materials into the extrusion mechanism 20.

[0023] As Figure 1 , 2As shown in Figure 4, the extrusion mechanism 20 includes an extruder 4 and an extrusion die 5. The extruder 4 has a feed port 401 for inputting a mixed material and a discharge port 402 for outputting the mixed material. The feed port 401 of the extruder 4 is connected to the twin-screw feeder 3, and the discharge port 402 of the extruder 4 is connected to the extrusion die 5; the extruder 4 also includes an extruder barrel 41 and an extrusion screw rotatably arranged in the extruder barrel 41, the extruder barrel 41 extends in the front-to-back direction, and the extruder barrel 41 is provided with a plurality of temperature regulating modules 43 equidistantly arranged in the front-to-back direction, each temperature regulating module 43 is used to adjust the temperature of the extruder barrel 41, so that the temperature in the extruder barrel 41 is stabilized at the process temperature, thereby ensuring the plasticization effect of the mixed material in the extruder 4; the extrusion screw includes an extrusion thread extending spirally along its own axis, and the extrusion thread compresses, shears and stirs the mixed material in the extruder barrel 41, so that the mixed material is fully melted and plasticized in the extruder 4. The extrusion die 5 receives the fully plasticized mixed material output from the discharge port 402 of the extruder 4, and extrude the mixed material into a sheet of a certain thickness. The thickness of the die opening of the extrusion die 5 is adjustable, so that the extrusion die 5 can produce sheets of different thicknesses according to production requirements, thereby expanding the scope of application of the conductive bipolar plate production line 100 and increasing product diversity.

[0024] like Figure 1 , 2 As shown in Figures 5 and 6, the forming mechanism 30 includes a roller forming machine 6, a roller temperature controller 7, a cooling bracket 8, a trimming device 9 and a tractor 11. The roller forming machine 6, the cooling bracket 8 and the tractor 11 are arranged in sequence from upstream to downstream. The roller forming machine 6 includes a plurality of rollers 61 and an adjustment assembly 62. The plurality of rollers 61 are parallel to each other and extend in the left-right direction. The plurality of rollers 61 are arranged to rotate in sequence from bottom to top. The sheet extruded by the extrusion die 5 passes through the plurality of rollers 61 in sequence, and the surface is calendered by the plurality of rollers 61, and preliminary cooling is performed and the forming thickness is adjusted; the adjustment assembly 62 is connected to the plurality of rollers 61 in a transmission manner to adjust the gap between two adjacent rollers 61, so as to adjust the forming thickness of the sheet; the plurality of rollers 61 are mirror rollers, and the surface of the sheet is more compact and smooth through the pressing of the adjacent rollers 61, thereby improving the quality and appearance of the finished product.

[0025] The roller temperature controller 7 is connected to the multiple rollers 61 of the roller forming machine 6 to adjust the temperature of the multiple rollers 61. The roller temperature controller 7 includes multiple cooling paths and multiple heating paths connected to the multiple rollers 61. Each roller 61 is configured with a cooling path and a heating path. A cooling component is provided in each cooling path, and a heating component is provided in each heating path.

[0026] The cooling bracket 8 includes a support frame 81 connected between the roll forming machine 6 and the traction machine 11 and a plurality of guide rollers 82 rotatably connected to the support frame 91. Each guide roller 82 extends in the left-right direction. The plurality of guide rollers 82 are rotatably arranged on the support frame 81 from front to back around their own axis. The sheet is transported from the roll forming machine 6 to the cooling bracket 8 and is traction-transported by the traction machine 11 downstream of the cooling bracket 8. The sheet on the cooling bracket 8 is supported and transported by the plurality of guide rollers 82. During the transportation process on the cooling bracket 8, the sheet is cooled and formed in the air.

[0027] like Figure 5 As shown, in the embodiment of the present application, the cooling bracket 8 is a segmented bracket, and the support frame 81 includes a first bracket segment 811 and a second bracket segment 812 arranged on the rear side of the first bracket segment 811, the front end of the first bracket segment 811 is connected to the roll-forming machine 6, and the rear end of the second bracket segment 812 is connected to the traction machine 11, and the rear end of the first bracket segment 811 is slidably arranged on the upper side of the front end of the second bracket segment 812, and the first bracket segment 811 can move forward and backward with the roll-forming machine 6 relative to the second bracket segment 812 to facilitate cleaning and maintenance of the roll-forming machine 6.

[0028] like Figure 5 , 6 As shown, the trimming device 9 is arranged on the cooling bracket 8 and on the first bracket section 811. The trimming device 9 is used to trim the sheet on the cooling bracket 8 and to slice the sheet into different widths according to production requirements. The trimming device 9 includes a pair of cutting assemblies 91 that can move in the left and right directions. By adjusting the adjustment position of the cutting assembly 91 in the left and right directions, sheets of different widths can be cut out, so that the conductive bipolar plate production line 100 can produce products of different widths. The cutting assembly 91 includes a blade 911 for cutting the sheet in the front-to-back direction. There is an angle α between the blade 911 and the sheet, and the cutting assembly 91 is configured to be able to adjust the angle α.

[0029] The traction machine 11 is used to traction and convey the sheet material, and provides power for the movement of the sheet material on the cooling bracket 8. The traction machine 11 includes a pair of rubber rollers 111 arranged opposite to each other in an upper and lower direction, the upper rubber roller 111 is drivingly connected to a pressing cylinder 112, the upper rubber roller 111 is driven by the pressing cylinder 112 to press the sheet material onto the lower rubber roller 111, the lower rubber roller 111 is drivingly connected to a driving motor, and the lower rubber roller 111 rotates around its own axis under the drive of the driving motor to achieve traction of the sheet material.

[0030] like Figure 1 , 2As shown in the figure, the finished product collection mechanism 40 includes a shearing machine 12, a conveyor 13, and a stacking table 14. The shearing machine 12 is arranged at the rear side of the tractor 11 to receive the sheet conveyed by the tractor 11. The shearing machine 12 includes a cutter for cutting the sheet in the left-right direction, a lifting motor for driving the cutter to move in the up-down direction, a length meter for measuring the length of the sheet, and a controller that is signal-connected to the lifting motor and the length meter. The controller is configured to control the operation of the lifting motor according to the measurement result of the length meter. When the length meter detects that the sheet has moved to the required sheet length for production, the controller controls the lifting motor to drive the cutter to cut downwards to cut the sheet to a fixed length and obtain the sheet meeting the production requirements. The conveyor 13 is arranged between the shearing machine 12 and the stacking table 14 to convey the sheet sheared by the shearing machine 12 to the stacking table 14. The surface of the stacking table 14 is covered with a stainless steel tabletop to prevent the surface of the sheet from being scratched when it is conveyed from the conveyor 13 to the stacking table 14. The stacking table 14 is used for stacking the finished sheets. When the finished products are stacked to a certain number, the staff will pack and transfer the finished products.

[0031] Based on the above structure of the conductive bipolar plate production line, an embodiment of the present application further provides a production method for conductive bipolar plates, and the production method includes the following steps: S1, the feeding mechanism receives the material, the internal mixer mixes and preliminarily melts the material, and the twin-screw feeder receives the uniformly mixed material and outputs the material to the extruder; S2, the extruder receives the material, heats and plasticizes the material, and the heated and plasticized material is extruded and extruded into a sheet at the die orifice of the extrusion die; S3, the sheet extruded by the extrusion die is preliminarily cooled and shaped by a roll forming machine; S4, the preliminarily cooled and shaped sheet is conveyed on the cooling bracket by the traction force provided by the tractor and cooled and shaped, and then the redundant edge material is cut off by a trimming device and sliced; S5, the shearing machine cuts the sheet to a fixed length to form a sheet; S6, the conveyor conveys the sheet to the stacking table, and the sheet is stacked on the stacking table The bipolar plate production line of the present application realizes the continuous production of conductive bipolar plates through the production method of conductive bipolar plates, improves production efficiency, and meets the high-yield demand of conductive bipolar plates.

[0032] The above shows and describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements. The scope of protection claimed by the present application is defined by the appended claims, the specification, and their equivalents.

Claims

1. A conductive bipolar plate production line, characterized in that, The invention comprises a feeding mechanism, an extrusion mechanism, a molding mechanism and a finished product collecting mechanism which are arranged in sequence from upstream to downstream; the feeding mechanism comprises an internal mixer, an elevator and a twin-screw feeder, the elevator is installed between the internal mixer and the twin-screw feeder to transport the material from the internal mixer to the twin-screw feeder; the extrusion mechanism comprises an extruder and an extrusion die, the extruder has a feeding port for inputting the material and a discharging port for outputting the material, the feeding port of the extruder is connected to the twin-screw feeder, the discharging port of the extruder is connected to the The extrusion die is connected; the forming mechanism includes a roll forming machine, a roll temperature controller, a cooling bracket, a trimming device and a traction machine, the roll forming machine, the cooling bracket and the traction machine are arranged in sequence from upstream to downstream, the roll temperature controller is connected to the multiple rollers of the roll forming machine to adjust the temperature of the multiple rollers, and the trimming device is arranged on the cooling bracket; the finished product collection mechanism includes a shearing machine, a conveyor and a stacking table, the conveyor is arranged between the shearing machine and the stacking table to convey the plate sheared by the shearing machine to the stacking table.

2. The conductive bipolar plate production line according to claim 1, characterized in that, The elevator is a bucket elevator, which includes a lifting track extending from the discharge port of the internal mixer to the feed port of the twin-screw feeder, a hopper slidably arranged on the lifting track, and a lifting drive assembly driving the hopper to move along the lifting track. The discharge port of the internal mixer is located at the lower side of the feed port of the twin-screw feeder.

3. The conductive bipolar plate production line according to claim 1, characterized in that, The twin-screw feeder is a conical twin-screw feeder, which comprises a feeder barrel and a pair of conical screws arranged opposite to each other. The pair of conical screws are rotatably arranged around their own axis in the feeder barrel.

4. The conductive bipolar plate production line according to claim 1, characterized in that, The extruder further comprises an extruder barrel and an extrusion screw rotatably arranged in the extruder barrel. The extruder barrel is provided with a plurality of temperature regulating modules equidistantly arranged in the longitudinal direction.

5. The conductive bipolar plate production line according to claim 1, characterized in that, The roll forming machine further comprises an adjusting component, which is drivingly connected to the plurality of rollers to adjust the gap between two adjacent rollers.

6. The conductive bipolar plate production line according to claim 1, characterized in that, The roller temperature controller comprises a plurality of cooling paths and a plurality of heating paths connected to the plurality of rollers, each of the cooling paths is provided with a cooling component, and each of the heating paths is provided with a heating component.

7. The conductive bipolar plate production line according to claim 1, characterized in that, The cooling bracket includes a support frame connected between the roll-forming machine and the traction machine and a plurality of guide rollers rotatably connected to the support frame, the plurality of guide rollers are arranged on the support frame in sequence from upstream to downstream, and each of the guide rollers extends in the transverse direction; the support frame includes a first bracket section connected to the roll-forming machine and a second bracket section connected to the traction machine, the first bracket section is slidably connected to the second bracket section.

8. The conductive bipolar plate production line according to claim 7, characterized in that, The described trimming device is arranged on the first bracket section. The trimming device includes at least one cutting assembly that can move in the transverse direction. The cutting assembly includes a blade for cutting the sheet in the longitudinal direction. There is an included angle between the blade and the sheet, and the cutting assembly is configured to be able to adjust the included angle.

9. The conductive bipolar plate production line according to claim 1, characterized in that, The described shearing machine includes a cutter for cutting the sheet in the left-right direction, a lifting motor for driving the cutter to move in the up-down direction, a length meter for measuring the length of the sheet, and a controller that is signal-connected to the lifting motor and the length meter. The controller is configured to control the operation of the lifting motor according to the measurement result of the length meter.

10. A production method of a conductive bipolar plate applied to the conductive bipolar plate production line according to any one of claims 1 to 9, characterized in that, It includes the following steps: S1. The feeding mechanism receives the material. The internal mixer mixes and preliminarily melts the material. The twin-screw feeder receives the uniformly mixed material and outputs the material to the extruder. S2. The extruder receives the material, heats and plasticizes the material. The heated and plasticized material is extruded and extruded into a sheet at the die orifice of the extrusion die. S3. The sheet extruded from the extrusion die undergoes preliminary cooling and shaping through a roll forming machine. S4. The preliminarily cooled and shaped sheet is conveyed on the cooling bracket by the traction force provided by the tractor and undergoes cooling and shaping. Then, the excess edge material is cut off by the trimming device and sliced. S5. The shearing machine cuts the sheet into fixed-length plates. S6. The conveyor conveys the plates to the stacking table, and the plates are stacked on the stacking table.

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