A preparation device and method for compression molded graphite bipolar plate

Abstract

The invention discloses a preparation device and preparation method of a compression-molded graphite bipolar plate, and the invention relates to the field of graphite compression molding technology, including a compression molding mechanism. The preparation device and preparation method of the compression-molded graphite bipolar plate, through the compression molding mechanism design, the bottom of the compression molding top block is connected to the connecting block, the bottom of the connecting block is connected to the spring rod, the bottom of the spring rod is connected to the punching head, and then the compression molding top block moves up and down with the hydraulic column, so as to achieve the compression molding effect, and secondly, the elastic properties of the spring rod play a certain buffering role, the bottom of the punching head is slidably connected to the protective plate, the protective plate plays a certain protective role on the punching head, reduces equipment wear, prolongs service life, and is convenient for replacement, and the separation mechanism separates the graphite bipolar plates to avoid adhesion and affect the working efficiency, and secondly, a strip groove is opened on the surface of the separator plate, and the gap is increased by opening the strip groove, the friction degree is reduced, the adhesion probability is reduced, and the normal operation of the equipment is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of graphite compression molding, and in particular to a preparation device and a preparation method for compression molding a graphite bipolar plate. Background Art

[0002] Bipolar plate, also known as current collector, is one of the important components of fuel cells. It has the following functions and properties: separation of fuel and oxidant, preventing gas from penetrating; collecting and conducting current, high conductivity; designed and processed flow channels, which can evenly distribute gas to the reaction layer of the electrode for electrode reaction; able to discharge heat and keep the battery temperature uniform; corrosion-resistant; impact-resistant and vibration-resistant; thin; light; low cost, easy to machine, suitable for batch manufacturing. Graphite is also a material with many excellent properties, high conductivity and good chemical stability, so it is often used in industry.

[0003] Graphite bipolar plates are prone to powder residue during the molding process, and adhesion due to temperature during the molding process. New designs have been developed to address these situations. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented by the following technical scheme: a preparation device for a compression molded graphite bipolar plate, comprising:

[0005] Preferably, the frame is used to support graphite bipolar plate preparation equipment;

[0006] A molding mechanism, which is used to stamp the graphite bipolar plate;

[0007] A mold mechanism, which is used to fix and support the graphite bipolar plate;

[0008] The bottom of the molding mechanism is fixedly connected to the top of the frame, the bottom of the mold mechanism is fixedly connected to the inside of the molding mechanism, and a limiting mechanism is fixedly connected to the edge of the outer surface of the molding mechanism;

[0009] Among them, the molding mechanism includes a molding top block, the bottom of the molding top block is fixedly connected to a hydraulic column, the bottom of the hydraulic column is fixedly connected to a workbench, the middle of the bottom of the molding top block is fixedly connected to a connecting block, the bottom of the connecting block is fixedly connected to a spring rod, and the elastic properties of the spring rod play a certain buffering role, the bottom of the spring rod is fixedly connected to a punching head, the bottom of the molding top block is connected to the connecting block, the bottom of the connecting block is connected to the spring rod, the bottom of the spring rod is connected to the punching head, and then the molding top block moves up and down with the hydraulic column, so as to achieve the molding effect, and the bottom of the punching head is slidably connected to a protective plate, a slide groove is provided at the bottom of the punching head, and the protective plate is slidably connected. The protective plate plays a certain protective role on the punching head, reduces equipment wear, prolongs service life, and is convenient for replacement. A square notch is provided in the middle of the top of the protective plate, and a partition mechanism is fixedly connected to the inner surface of the square notch.

[0010] Preferably, the partition mechanism includes a transverse partition, which plays a fixing and bearing role to improve the stability of the partition mechanism. The edge of the outer surface of the transverse partition is fixedly connected to the inner surface of the square groove. The top of the transverse partition is fixedly connected to a blocking block. The inner surface of the blocking block is slidably connected to a connecting rod. The top of the connecting rod is fixedly connected to a baffle. The blocking block adopts a top-retracted structure, and the top of the connecting rod is connected to the baffle, so that when the connecting rod slides inside the blocking block, the baffle plays a certain limiting role to prevent excessive expansion and contraction, which affects the separation efficiency.

[0011] Preferably, the top of the baffle is fixedly connected with an air cushion, and the end of the connecting rod away from the air cushion is fixedly connected with a partition plate, and a strip groove is provided at the bottom of the partition plate. The air cushion plays the role of ejection and contraction. When the partition mechanism is pressed downward by the molding mechanism, the air cushion is squeezed and presents a contracted state. When the molding mechanism rises, the air cushion is ejected and restored from the contracted state. The connecting rod connects the partition plate and pushes the connecting rod downward, thereby achieving the effect of separating the graphite bipolar plates, avoiding adhesion and affecting the working efficiency. Secondly, a strip groove is provided on the surface of the partition plate. By providing the strip groove, the gap is increased, the friction degree is reduced, and the probability of adhesion is reduced.

[0012] Preferably, the mold mechanism includes a mold shell, a mold top plate is placed on the top of the mold shell, and the mold top plate is placed on the top of the mold shell, so that the mold shell is protected by the mold top plate, equipment wear is reduced, and the service life of the equipment is extended. The outer surface of the mold shell is respectively fixedly connected with tooth mark blocks and square tubes, and the square tubes act as ventilation ducts. The mold shell is connected to the tooth mark blocks and then plugged into the top of the air supply mechanism to play the role of plug-in connection. The design of multiple tooth mark blocks increases the contact area, increases the friction force, and improves the stability effect. The outer surfaces of the tooth mark blocks and the square tubes are plugged with the air supply mechanism.

[0013] Preferably, a conical block is fixedly connected to the inner surface of the mold shell, a semi-arc block is fixedly connected to the arc portion of the outer surface of the conical block, the conical block is connected to the semi-arc block, the semi-arc block is made of silicone material, and is adhered to the surface of the columnar block. The silicone material absorbs the amplitude of the stamping, which has a certain shock-absorbing effect. The outer surface of the semi-arc block is fixedly connected to a columnar block, which is connected to the inside of the mold shell to stabilize the structure. The outer surface of the conical block is fixedly connected to a connecting frame, the conical block is connected to the connecting frame, and is supported inside the mold shell through the connecting frame, which has a certain supporting effect, thereby improving the stability of the equipment and preventing structural deformation.

[0014] Preferably, the air supply mechanism comprises an air supply housing, and a tooth mark groove and a ventilation groove are respectively provided at the concave portion at the top of the air supply housing, and the inner surfaces of the tooth mark groove and the ventilation groove are respectively plugged into the outer surfaces of the tooth mark block and the square tube. The tooth mark block is plugged into the inner surface of the tooth mark groove to play a fixing role, and the square tube is plugged into the inside of the ventilation groove to play a connecting role.

[0015] Preferably, a top groove is provided at the edge of the top of the air supply housing, an elastic rod is fixedly connected to the inner surface of the top groove, a pressing top plate is fixedly connected to the top of the elastic rod, a colloid air box is fixedly connected to the middle of the bottom of the pressing top plate, and an air chamber is provided inside the air supply housing. During the downward stamping process of the molding mechanism, the pressing top plate is pressed downward, and during the downward stamping process of the pressing top plate, the colloid air box is pressed, thereby generating wind force, which fills the inside of the air chamber and then washes toward the surface of the mold mechanism along with the square tube, thereby reducing crushing residue and improving stamping efficiency.

[0016] Preferably, the limiting mechanism includes a limiting top plate, the top of the limiting top plate is fixedly connected to the edge of the bottom of the molded top block, the bottom of the limiting top plate is fixedly connected to a telescopic rod, the top of the telescopic rod is connected to the bottom of the molded top block, and as the molding mechanism is squeezed downward, it plays an anti-deviating role, the bottom of the telescopic rod is slidably connected to a shock absorbing mechanism, and the outer surface of the telescopic rod is fixedly connected to an external block on one side close to the shock absorbing mechanism, and when the shock absorbing mechanism is squeezed downward by the external block, it plays a certain limiting role to prevent the equipment from excessively descending and excessive pressure from affecting the stamping quality.

[0017] Preferably, the shock absorbing mechanism includes a shock absorbing shell, the outer surface of the shock absorbing shell is slidably connected to a sliding block, the outer surface of the sliding block is fixedly connected to a protruding block, the sliding block is connected to the protruding block, and the friction area is increased by designing multiple protruding blocks, which are in contact with the external block to increase the stability effect; the outer surface of the shock absorbing shell is sleeved with a spring bar, the sliding block slides and squeezes the spring bar, and the spring material plays a shock absorbing and buffering role; the interior of the shock absorbing shell is provided with a soft pad, and the telescopic rod contacts the soft pad when it is squeezed downward inside the shock absorbing shell, and the soft pad plays a buffering role.

[0018] A method for preparing a compression-molded graphite bipolar plate comprises the following steps:

[0019] Step 1: Loading: placing the graphite bipolar plate on top of the mold mechanism, and the mold mechanism performs limited shaping on the graphite bipolar plate;

[0020] Step 2: stamping, the molding mechanism stamps the graphite bipolar plate placed on the top of the mold mechanism, and the molding mechanism molds the graphite bipolar plate;

[0021] Step 3: When the molding mechanism is stamping the graphite bipolar plate, the limiting mechanism controls the stamping amplitude of the molding mechanism;

[0022] Step 4: Separation: After the molding mechanism molds the graphite bipolar plate inside the mold mechanism, the graphite bipolar plate is taken out.

[0023] The present invention provides a preparation device and method for a compression molded graphite bipolar plate.

[0024] Beneficial effects:

[0025] 1. The preparation equipment and preparation method of the molded graphite bipolar plate are designed through the molding mechanism. The bottom of the molded top block is connected to the connecting block, the bottom of the connecting block is connected to the spring rod, the bottom of the spring rod is connected to the punching head, and then the molded top block moves up and down with the hydraulic column, so as to achieve the effect of molding. Secondly, the elastic characteristics of the spring rod play a certain buffering role. A sliding groove is provided at the bottom of the punching head, which is slidably connected to the protective plate. The protective plate plays a certain protective role on the punching head, reduces equipment wear, prolongs service life, and is convenient for replacement.

[0026] 2. The preparation equipment and preparation method of the compression molded graphite bipolar plate, through the design of the separator mechanism, the transverse partition plays the role of fixing and bearing, improves the stability of the separator mechanism, the barrier block adopts a top-contracted structure, and the top of the connecting rod is connected to the baffle, so that when the connecting rod slides inside the barrier block, the baffle plays a certain limiting role to prevent excessive expansion and contraction, which affects the separation efficiency. The air cushion plays the role of ejection and contraction. When the separator mechanism is pressed downward with the molding mechanism, the air cushion is squeezed and presents a contracted state. When the molding mechanism rises, the air cushion ejects and recovers from the contracted state. The connecting rod connects the separator plate and pushes the connecting rod downward, thereby achieving the role of separating the graphite bipolar plates, avoiding adhesion and affecting the working efficiency. Secondly, a strip groove is opened on the surface of the separator plate. By opening the strip groove, the gap is increased, the friction degree is reduced, and the probability of adhesion is reduced.

[0027] 3. The preparation equipment and preparation method of the compression molded graphite bipolar plate, through the design of the air supply mechanism, the tooth mark block is inserted into the inner surface of the tooth mark groove to play a fixing role, and the square tube is inserted into the inside of the ventilation groove to play a connecting role. In the process of the downward stamping of the molding mechanism, the pressing top plate is pressed downward, and the colloid air box is pressed downward in the process of pressing the top plate downward, thereby generating wind force, which fills the inside of the air chamber, and then washes toward the surface of the mold mechanism along with the square tube, reducing the crushing residue and improving the stamping efficiency.

[0028] 4. The preparation equipment and preparation method of the molded graphite bipolar plate are designed with a shock-absorbing mechanism, in which the sliding block is connected to the protruding block. The multiple protruding blocks are designed to increase the friction area and contact with the external block to increase the stability effect. The sliding block slides and squeezes the spring bar, and the spring material plays a shock-absorbing and buffering role. Secondly, the telescopic rod contacts the soft pad when it is squeezed downward inside the shock-absorbing shell, and the soft pad plays a buffering role.

[0029] 5. The preparation equipment and preparation method of the compression molded graphite bipolar plate are designed through the mold mechanism. A mold top plate is placed on the top of the mold shell. The mold top plate protects the mold shell, reduces equipment wear, and extends the service life of the equipment. The square tube serves as a ventilation duct. The mold shell is connected to the tooth mark block and then plugged into the top of the air supply mechanism to play the role of plug-in connection. Secondly, through the design of multiple tooth mark blocks, the contact area is increased, the friction force is increased, and the stability effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the external structure of a device for preparing a compression-molded graphite bipolar plate according to the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a preparation device for a compression-molded graphite bipolar plate of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure of the molding mechanism of the present invention;

[0033] Figure 4 It is a schematic diagram of the cross-sectional structure of the separation mechanism of the present invention;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the mold mechanism of the present invention;

[0035] Figure 6 This is a schematic diagram of the cross-sectional structure of the air supply mechanism of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of the mechanism defined in the present invention;

[0037] Figure 8 It is a schematic diagram of the cross-sectional structure of the shock absorbing mechanism of the present invention;

[0038] Fig. 9 It is a schematic diagram of the preparation method of the present invention.

[0039] In the figure: 1, frame; 2, molding mechanism; 3, mold mechanism; 4, limiting mechanism; 21, molding top block; 22, hydraulic column; 23, workbench; 24, connecting block; 25, spring rod; 26, punch head; 27, protective plate; 28, square notch; 29, partition mechanism; 291, cross partition; 292, blocking block; 293, baffle; 294, air cushion; 295, connecting rod; 296, partition; 297, strip groove; 31, mold shell; 32, mold top plate; 33, cone block; 34, column Block; 35, semi-arc block; 36, connecting frame; 37, square tube; 38, tooth mark block; 39, air supply mechanism; 391, air supply shell; 392, top groove; 393, tooth mark groove; 394, ventilation groove; 395, pressing top plate; 396, elastic rod; 397, colloid air box; 398, air chamber; 41, limiting top plate; 42, telescopic rod; 43, external block; 44, shock absorbing mechanism; 441, shock absorbing shell; 442, sliding block; 443, raised block; 444, spring bar; 445, cushion. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0041] The first embodiment, as Figures 1 to 3As shown, the present invention provides a technical solution: a preparation device and a preparation method for a compression-molded graphite bipolar plate, comprising a frame 1, the frame 1 is used to support the graphite bipolar plate preparation device;

[0042] A molding mechanism 2, the molding mechanism 2 is used to stamp the graphite bipolar plate;

[0043] A mold mechanism 3, which is used to fix and support the graphite bipolar plate;

[0044] The bottom of the molding mechanism 2 is fixedly connected to the top of the frame 1, the bottom of the mold mechanism 3 is fixedly connected to the inside of the molding mechanism 2, and the edge of the outer surface of the molding mechanism 2 is fixedly connected with a limiting mechanism 4;

[0045] Among them, the molding mechanism 2 includes a molding top block 21, the bottom of the molding top block 21 is fixedly connected to a hydraulic column 22, the bottom of the hydraulic column 22 is fixedly connected to a workbench 23, the middle of the bottom of the molding top block 21 is fixedly connected to a connecting block 24, the bottom of the connecting block 24 is fixedly connected to a spring rod 25, the bottom of the spring rod 25 is fixedly connected to a punching head 26, the bottom of the punching head 26 is slidably connected to a protective plate 27, a square slot 28 is opened in the middle of the top of the protective plate 27, and the inner surface of the square slot 28 is fixedly connected to a partition mechanism 29. The bottom of the molded top block 21 is connected to the connecting block 24, the bottom of the connecting block 24 is connected to the spring rod 25, and the bottom of the spring rod 25 is connected to the punch head 26. Then the molded top block 21 moves up and down with the hydraulic column 22, so as to achieve the effect of molding. Secondly, the elastic characteristics of the spring rod 25 play a certain buffering role. A sliding groove is provided at the bottom of the punch head 26, which is slidably connected to the protective plate 27. The protective plate 27 plays a certain protective role on the punch head 26, reduces equipment wear, prolongs service life, and facilitates replacement.

[0046] The second embodiment is based on the first embodiment. Figures 4 to 6 As shown, the partition mechanism 29 includes a transverse partition 291, the edge of the outer surface of the transverse partition 291 is fixedly connected to the inner surface of the square slot 28, the top of the transverse partition 291 is fixedly connected to a blocking block 292, the inner surface of the blocking block 292 is slidably connected to a connecting rod 295, and the top of the connecting rod 295 is fixedly connected to a baffle 293. The transverse partition 291 plays a role of fixing and bearing, improving the stability of the partition mechanism 29, the blocking block 292 adopts a top-contracted structure, and the top of the connecting rod 295 is connected to the baffle 293, so that when the connecting rod 295 slides inside the blocking block 292, the baffle 293 plays a certain limiting role, preventing excessive expansion and contraction, which affects the separation efficiency.

[0047] The top of the baffle 293 is fixedly connected with an air cushion 294, and the end of the connecting rod 295 away from the air cushion 294 is fixedly connected with a partition plate 296, and a strip groove 297 is provided at the bottom of the partition plate 296. The air cushion 294 plays the role of ejection and contraction. When the partition mechanism 2 is pressed downward with the molding mechanism 2, the air cushion 294 is squeezed and presents a contracted state. When the molding mechanism 2 rises, the air cushion 294 is ejected and restored from the contracted state. The connecting rod 295 is connected to the partition plate 296, and the connecting rod 295 is pushed downward, thereby achieving the effect of separating the graphite bipolar plates, avoiding adhesion and affecting the working efficiency. Secondly, a strip groove 297 is provided on the surface of the partition plate 296. By providing the strip groove 297, the gap is increased, the friction degree is reduced, and the probability of adhesion is reduced.

[0048] The mold mechanism 3 includes a mold shell 31, a mold top plate 32 is placed on the top of the mold shell 31, and the outer surface of the mold shell 31 is respectively fixedly connected with a tooth mark block 38 and a square tube 37, and the outer surface of the tooth mark block 38 and the square tube 37 is plugged with an air supply mechanism 39. The mold top plate 32 is placed on the top of the mold shell 31, and the mold top plate 32 protects the mold shell 31, reduces equipment wear and prolongs the service life of the equipment. The square tube 37 acts as a ventilation duct. The mold shell 31 is connected to the tooth mark block 38, and then plugged into the top of the air supply mechanism 39, which plays the role of plug-in connection. Secondly, through the design of multiple tooth mark blocks 38, the contact area is increased, the friction strength is increased, and the stability effect is improved.

[0049] The inner surface of the mold shell 31 is fixedly connected with a conical block 33, the arc portion of the outer surface of the conical block 33 is fixedly connected with a semi-arc block 35, the outer surface of the semi-arc block 35 is fixedly connected with a columnar block 34, and the outer surface of the conical block 33 is fixedly connected with a connecting frame 36. The columnar block 34 is connected to the inside of the mold shell 31 to stabilize the structure, the conical block 33 is connected to the semi-arc block 35, the semi-arc block 35 is made of silicone material, and is attached to the surface of the columnar block 34. The silicone material absorbs the amplitude of stamping, which has a certain shock-absorbing effect. Secondly, the conical block 33 is connected to the connecting frame 36, and is supported inside the mold shell 31 by the connecting frame 36, which plays a certain supporting role, improves the stability of the equipment, and prevents structural deformation.

[0050] The air supply mechanism 39 includes an air supply housing 391, and a tooth mark groove 393 and a ventilation groove 394 are respectively provided in the concave portion of the top of the air supply housing 391, and the inner surfaces of the tooth mark groove 393 and the ventilation groove 394 are respectively plugged into the outer surfaces of the tooth mark block 38 and the square tube 37. The tooth mark block 38 is plugged into the inner surface of the tooth mark groove 393 to play a fixing role, and the square tube 37 is plugged into the inside of the ventilation groove 394 to play a connecting role.

[0051] A top groove 392 is provided at the edge of the top of the air supply housing 391, an elastic rod 396 is fixedly connected to the inner surface of the top groove 392, a pressing top plate 395 is fixedly connected to the top of the elastic rod 396, a colloid gas box 397 is fixedly connected to the middle of the bottom of the pressing top plate 395, and an air chamber 398 is provided inside the air supply housing 391. During the downward stamping process of the molding mechanism 2, the pressing top plate 395 is pressed downward, and during the downward stamping process of the pressing top plate 395, the colloid gas box 397 is pressed, thereby generating wind force, which fills the inside of the air chamber 398 and then washes toward the surface of the mold mechanism 3 along with the square tube 37, thereby reducing crushing residue and improving stamping efficiency.

[0052] The third embodiment is based on the first and second embodiments. Figures 7 to 9 As shown, the limiting mechanism 4 includes a limiting top plate 41, the top of which is fixedly connected to the edge of the bottom of the molded top block 21, the bottom of which is fixedly connected to a telescopic rod 42, the bottom of which is slidably connected to a shock absorbing mechanism 44, and an external block 43 is fixedly connected to the outer surface of the telescopic rod 42 near the shock absorbing mechanism 44. The top of the telescopic rod 42 is connected to the bottom of the molded top block 21, and plays a role in preventing deviation when the molded mechanism 2 is pressed downward. Secondly, when the shock absorbing mechanism 44 is pressed downward by the external block 43, it plays a certain limiting role, preventing the equipment from excessively falling and excessive pressure from affecting the stamping quality.

[0053] The shock absorbing mechanism 44 includes a shock absorbing shell 441, the outer surface of the shock absorbing shell 441 is slidably connected with a sliding block 442, the outer surface of the sliding block 442 is fixedly connected with a protruding block 443, the outer surface of the shock absorbing shell 441 is sleeved with a spring bar 444, and the interior of the shock absorbing shell 441 is provided with a soft pad 445. The sliding block 442 is connected to the protruding block 443, and the friction area is increased by designing multiple protruding blocks 443, and the contact with the external block 43 increases the stability effect. The sliding block 442 slides and squeezes the spring bar 444, and the spring material plays a role of shock absorption and buffering. Secondly, when the telescopic rod 42 is squeezed downward inside the shock absorbing shell 441, it contacts the soft pad 445, and the soft pad 445 plays a role of buffering.

[0054] A method for preparing a compression-molded graphite bipolar plate comprises the following steps:

[0055] Step 1: Loading: placing the graphite bipolar plate on top of the mold mechanism 3, and the mold mechanism 3 performs limited shaping on the graphite bipolar plate;

[0056] Step 2: stamping: the molding mechanism 2 stamps the graphite bipolar plate placed on the top of the mold mechanism 3, and the molding mechanism 2 molds the graphite bipolar plate;

[0057] Step 3: When the molding mechanism 2 is stamping the graphite bipolar plate, the limiting mechanism 4 controls the stamping amplitude of the molding mechanism 2;

[0058] Step 4: separation: after the molding mechanism 2 molds the graphite bipolar plate inside the mold mechanism 3, the graphite bipolar plate is taken out.

[0059] When in use, the graphite bipolar plate is placed in the middle of the top of the mold mechanism 3, and then the graphite bipolar plate on the top of the mold mechanism 3 is stamped by the molding mechanism 2, so as to achieve the effect of molding. Secondly, during the stamping process, due to temperature changes, the graphite bipolar plate may stick together, affecting the working efficiency and reducing the molding quality. Therefore, a separator 29 is set inside the molding mechanism 2. The separator 29 reduces the probability of adhesion, prevents the graphite bipolar plate from sticking together, and improves the working efficiency.

[0060] Secondly, during the process of the molding mechanism 2 stamping the mold mechanism 3, there is a possibility of powder residue, which affects the subsequent operation efficiency. Therefore, an air supply mechanism 39 is set inside the mold mechanism 3. The molding mechanism 2 applies pressure to the air supply mechanism 39, so that the air supply mechanism 39 generates wind force to flush the surface of the mold mechanism 3, thereby achieving the effect of cleaning the powder and improving the operation efficiency.

[0061] During the downward stamping process of the molding mechanism 2, in order to limit the stamping force and ensure the molding quality of the graphite bipolar plate, a limiting mechanism 4 is set up. The limiting mechanism 4 plays an anti-deviating role to prevent the stamping deviation from affecting the quality of the graphite bipolar plate. Secondly, a shock absorbing mechanism 44 is set inside the limiting mechanism 4. The shock absorbing mechanism 44 plays a shock absorbing and buffering role to protect the normal operation of the equipment and extend the service life of the equipment. Then the graphite bipolar plate is taken out from the top of the mold mechanism 3.

[0062] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A preparation device for a compression molded graphite bipolar plate, characterized in that: include: A frame (1), the frame (1) being used to support the molding mechanism (3), the mold mechanism (3) and the limiting mechanism (4); A molding mechanism (2), the molding mechanism (2) being used for stamping a graphite bipolar plate; A mold mechanism (3), the mold mechanism (3) being used to fix and support the graphite bipolar plate; The bottom of the molding mechanism (2) is fixedly connected to the top of the frame (1), the bottom of the mold mechanism (3) is fixedly connected to the inside of the molding mechanism (2), and a limiting mechanism (4) is fixedly connected to the edge of the outer surface of the molding mechanism (2); The molding mechanism (2) comprises a molding top block (21), the bottom of the molding top block (21) is fixedly connected to a hydraulic column (22), the bottom of the hydraulic column (22) is fixedly connected to a workbench (23), the middle of the bottom of the molding top block (21) is fixedly connected to a connecting block (24), the bottom of the connecting block (24) is fixedly connected to a spring rod (25), the bottom of the spring rod (25) is fixedly connected to a punching head (26), the bottom of the punching head (26) is slidably connected to a protective plate (27), a square notch (28) is provided in the middle of the top of the protective plate (27), and a partition mechanism (29) is fixedly connected to the inner surface of the square notch (28).

2. The equipment for preparing a compression molded graphite bipolar plate according to claim 1, characterized in that: The partition mechanism (29) comprises a transverse partition (291), the edge of the outer surface of the transverse partition (291) being fixedly connected to the inner surface of the square notch (28), the top of the transverse partition (291) being fixedly connected to a blocking block (292), the inner surface of the blocking block (292) being slidably connected to a connecting rod (295), and the top of the connecting rod (295) being fixedly connected to a baffle (293).

3. The equipment for preparing a compression molded graphite bipolar plate according to claim 2, characterized in that: The top of the baffle (293) is fixedly connected to an air cushion (294), one end of the connecting rod (295) away from the air cushion (294) is fixedly connected to a partition plate (296), and a strip-shaped groove (297) is provided at the bottom of the partition plate (296).

4. The equipment for preparing a compression molded graphite bipolar plate according to claim 1, characterized in that: The mold mechanism (3) comprises a mold shell (31), a mold top plate (32) is placed on the top of the mold shell (31), a tooth mark block (38) and a square tube (37) are fixedly connected to the outer surface of the mold shell (31), and an air supply mechanism (39) is inserted into the outer surfaces of the tooth mark block (38) and the square tube (37).

5. The equipment for preparing a compression molded graphite bipolar plate according to claim 4, characterized in that: A conical block (33) is fixedly connected to the inner surface of the mold shell (31), a semi-arc block (35) is fixedly connected to the arc portion of the outer surface of the conical block (33), a columnar block (34) is fixedly connected to the outer surface of the semi-arc block (35), and a connecting frame (36) is fixedly connected to the outer surface of the conical block (33).

6. The equipment for preparing a compression molded graphite bipolar plate according to claim 4, characterized in that: The air supply mechanism (39) comprises an air supply housing (391), wherein a tooth mark groove (393) and a ventilation groove (394) are respectively provided at a recessed portion at the top of the air supply housing (391), and the inner surfaces of the tooth mark groove (393) and the ventilation groove (394) are respectively plugged into the outer surfaces of the tooth mark block (38) and the square tube (37).

7. The equipment for preparing a compression molded graphite bipolar plate according to claim 6, characterized in that: A top groove (392) is provided at the edge of the top of the air supply housing (391); an elastic rod (396) is fixedly connected to the inner surface of the top groove (392); a pressing top plate (395) is fixedly connected to the top of the elastic rod (396); a colloid air box (397) is fixedly connected to the middle of the bottom of the pressing top plate (395); and an air chamber (398) is provided inside the air supply housing (391).

8. The equipment for preparing a compression molded graphite bipolar plate according to claim 1, characterized in that: The limiting mechanism (4) comprises a limiting top plate (41), the top of the limiting top plate (41) being fixedly connected to the edge of the bottom of the molded top block (21), the bottom of the limiting top plate (41) being fixedly connected to a telescopic rod (42), the bottom of the telescopic rod (42) being slidably connected to a shock absorbing mechanism (44), and the outer surface of the telescopic rod (42) being fixedly connected to an external block (43) on one side close to the shock absorbing mechanism (44).

9. The equipment for preparing a compression molded graphite bipolar plate according to claim 8, characterized in that: The shock absorbing mechanism (44) comprises a shock absorbing shell (441), the outer surface of the shock absorbing shell (441) being slidably connected to a sliding block (442), the outer surface of the sliding block (442) being fixedly connected to a protruding block (443), the outer surface of the shock absorbing shell (441) being sleeved with a spring bar (444), and a soft cushion (445) being arranged inside the shock absorbing shell (441).

10. A method for preparing a compression molded graphite bipolar plate, using a compression molded graphite bipolar plate preparation device according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Loading: placing the graphite bipolar plate on top of the mold mechanism (3), and the mold mechanism (3) performs limited shaping on the graphite bipolar plate; Step 2: stamping, the molding mechanism (2) stamps the graphite bipolar plate placed on the top of the mold mechanism (3), and the molding mechanism (2) molds the graphite bipolar plate; Step three, limiting, when the molding mechanism (2) is stamping the graphite bipolar plate, the limiting mechanism (4) controls the stamping amplitude of the molding mechanism (2); Step 4: separation: after the molding mechanism (2) molds the graphite bipolar plate inside the mold mechanism (3), the graphite bipolar plate is taken out.

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