Graphite brick pressing device

Abstract

The utility model discloses a graphite brick pressing device, which relates to the technical field of graphite processing, and comprises a die and an extrusion unit, the extrusion unit comprises a first hydraulic cylinder, the first hydraulic cylinder is provided with a first pressing plate, one end of the first pressing plate is provided with a second hydraulic cylinder, the first pressing plate is provided with an accommodating opening at the position of the second hydraulic cylinder, and the accommodating opening is internally provided with a second pressing plate. The second pressing plate is connected with the second hydraulic cylinder, and when the first hydraulic cylinder extends out, one side of the first pressing plate and one side of the second pressing plate are coplanar; the mold comprises a mold cavity, the mold cavity just accommodates the first pressing plate and the second pressing plate, a third hydraulic cylinder is arranged at the end, away from the second pressing plate, of the mold cavity, the third hydraulic cylinder is perpendicular to the first hydraulic cylinder in action, and the third hydraulic cylinder is located in the mold cavity and provided with a push plate; according to the graphite brick demoulding device disclosed by the utility model, the stroke of the hydraulic cylinder is reduced, the equipment cost is reduced, the internal stress of a graphite brick is released, the graphite brick is prevented from being broken, and the normal demoulding is ensured.

Description

Technical Field

[0001] This utility model relates to the field of graphite processing technology, and in particular to a graphite brick pressing device. Background Technology

[0002] Graphite bricks are a type of material made from graphite powder and pressed into a brick shape using an extrusion device.

[0003] Currently, in the pressing process of graphite bricks, graphite powder is generally first added into the mold cavity, and then a hydraulic cylinder is used to drive the pressure film to extrude the graphite powder in the mold to obtain graphite bricks.

[0004] However, the existing method has the following two main problems: 1. Graphite bricks exist in a loose powder state before molding. Under the extrusion, their volume will continue to shrink. For example, if you want to press a graphite brick with a length, width and height of 1 meter, the volume of the graphite powder needs to reach 2 meters or even more to press it successfully. This requires a hydraulic cylinder with a very large stroke, which indirectly increases the cost of the equipment and the area occupied.

[0005] 2. The existing mold is fixed on all sides. During the extrusion process, the graphite will generate internal stress. When the pressure on the graphite is removed by the hydraulic cylinder, the graphite has no space to release the internal stress because the mold is fixed on all sides. At this time, the graphite brick will arch in the middle under the action of internal stress. When the graphite arches, it will break, which will affect the normal demolding and reduce the chance of molding.

[0006] Therefore, there is an urgent need for graphite brick pressing devices to reduce the stroke of hydraulic cylinders, lower equipment costs, release internal stress to prevent breakage, and ensure smooth demolding. Utility Model Content

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A graphite brick pressing device includes a mold for graphite forming and an extrusion unit, characterized in that: the extrusion unit includes a first hydraulic cylinder, the output end of the first hydraulic cylinder is provided with a first pressure plate, one end of the first pressure plate is provided with a second hydraulic cylinder, the first pressure plate is provided with a receiving port at the position of the second hydraulic cylinder, the receiving port is provided with a second pressure plate, one side of the second pressure plate is connected to the output end of the second hydraulic cylinder, and when the output end of the first hydraulic cylinder is extended, one side of the first pressure plate and the second pressure plate are coplanar;

[0009] The mold includes a mold cavity that can accommodate a first pressure plate and a second pressure plate. A third hydraulic cylinder is provided at the end of the mold cavity away from the second pressure plate. The third hydraulic cylinder is perpendicular to the direction of action of the first hydraulic cylinder. A push plate is provided at the output end of the third hydraulic cylinder inside the mold cavity.

[0010] The mold cavity is located directly below the second pressure plate and has a top plate. A demolding drive cylinder is provided on one side of the top plate.

[0011] Furthermore, the mold has a carrier plate on one side of the mold cavity along its length, a feeding frame on one side of the carrier plate, and a feeding drive cylinder at one end of the feeding frame.

[0012] Furthermore, the second pressure plate has guide posts at each of its four corners near the second hydraulic cylinder, and the first pressure plate has guide holes at the positions corresponding to the guide posts.

[0013] Furthermore, guide blocks are provided at both ends of the push plate, and guide grooves are provided at the positions of the guide blocks in the mold cavity, with the guide blocks and guide grooves cooperating.

[0014] Furthermore, at least one mounting frame is provided at the end of the first pressure plate away from the second pressure plate, and a counterweight is provided inside the mounting frame.

[0015] Furthermore, the carrier plate has multiple insertion holes on the side near the mold, and the mold has insertion posts at the corresponding positions of the insertion holes, with the insertion posts cooperating with the insertion holes.

[0016] Furthermore, the bottom of the mold is provided with a support, and the demolding drive cylinder is disposed within the support.

[0017] Furthermore, the height of the push plate is less than the depth of the mold cavity.

[0018] In summary, the beneficial technical effects of this utility model are as follows:

[0019] (1) The first hydraulic cylinder simultaneously drives the first pressure plate and the second pressure plate to perform the first compression of the loose graphite in the mold cavity, thereby spreading the graphite in the mold cavity. This reduces the thickness of the graphite in the same volume, thereby reducing the stroke of the first hydraulic cylinder and reducing the cost of the equipment. The reduced stroke of the first hydraulic cylinder also reduces the space occupied by the equipment. The third hydraulic cylinder pushes the graphite after the first compression to the bottom of the second pressure plate through the push plate. The second hydraulic cylinder performs a second compression of the graphite to obtain graphite bricks. During demolding, the third hydraulic cylinder drives the push plate to retract, providing space for the graphite bricks to release internal stress. When the first pressure plate retracts, the stress of the graphite bricks is released, thus avoiding breakage. Then, the demolding drive cylinder uses the top plate to push out the graphite bricks to achieve smooth demolding.

[0020] (2) The feeding frame is driven by the feeding cylinder to feed graphite into the mold cavity, replacing manual processing. At the same time, the feeding frame is used to feed graphite along the length of the mold cavity, which avoids the graphite from accumulating at one end of the mold cavity and makes it easier for the first pressure plate to distribute the graphite more evenly.

[0021] (3) The guide post improves the directionality of the second pressure plate, ensuring the accuracy of retraction into the receiving port, and also ensuring that the first pressure plate can fall smoothly into the mold cavity during the next extrusion.

[0022] (4) The counterweight can balance the weight at both ends of the first pressure plate, thereby making the force of the first hydraulic cylinder on the first pressure plate more uniform.

[0023] (5) By using the guide groove and guide block, the fit and directionality between the push plate and the bottom of the mold cavity are ensured, and the push plate can push the graphite more thoroughly to one end of the second pressure plate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 yes Figure 1 A structural diagram from another angle;

[0026] Figure 3 This is a schematic diagram of the extrusion unit;

[0027] Figure 4 yes Figure 1 The structural schematic diagram of the extrusion unit is hidden;

[0028] Figure 5 yes Figure 4 A diagram showing the carrier board is hidden.

[0029] Reference numerals: 1. First hydraulic cylinder; 2. Second hydraulic cylinder; 3. Third hydraulic cylinder; 4. First pressure plate; 5. Second pressure plate; 6. Support; 7. Mold; 8. Mold cavity; 9. Top plate; 10. Demolding drive cylinder; 11. Carrier plate; 12. Feeding frame; 13. Feeding drive cylinder; 14. Guide column; 15. Mounting plate; 16. Mounting frame; 17. Counterweight; 18. Guide groove; 19. Guide block; 20. Push plate; 21. Insert column. Detailed Implementation

[0030] The present invention will now be described clearly and completely with reference to the embodiments.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] See appendix Figure 1-5 The graphite brick pressing device shown includes a mold 7 and an extrusion unit disposed above the mold 7. The mold 7 has a cavity 8 for placing graphite. The extrusion unit includes a first hydraulic cylinder 1, which is mounted and fixed to the frame via a mounting plate 15 during use. The output end of the first hydraulic cylinder 1 is bolted to a first pressure plate 4. One end of the first pressure plate 4 has a receiving opening, and a second pressure plate 5 is disposed within the receiving opening. A second hydraulic cylinder 2 is disposed at the position of the first pressure plate 4 and the second pressure plate 5. The output end of the second hydraulic cylinder 2 is connected to the second pressure plate 5. During use, the first hydraulic cylinder 1 drives the first pressure plate 4 and the second pressure plate 5 to press the graphite inside the cavity 8. The graphite is first extruded. When the first hydraulic cylinder 1 extends for the first time, the extrusion surfaces of the first pressure plate 4 and the second pressure plate 5 are flush and coplanar. This allows the first pressure plate 4 and the second pressure plate 5 to act as a single surface on the graphite. Then, the loose graphite in the mold cavity 8 is spread out into the mold cavity 8 under the extrusion action, thereby reducing the thickness of the graphite in the same volume. This reduces the stroke of the first hydraulic cylinder 1 and indirectly reduces the cost of the entire extrusion equipment. At the same time, the reduction in the stroke of the first hydraulic cylinder 1 also reduces the space occupied by the extrusion equipment. Then, the second hydraulic cylinder 2 drives the second pressure plate 5 to extrude the graphite a second time to obtain graphite bricks.

[0034] The mold cavity 8 can perfectly accommodate the first pressure plate 4 and the second pressure plate 5. A support bracket 6 is provided at the bottom of the mold 7. A third hydraulic cylinder 3 is located at the end of the mold 7 away from the second pressure plate 5 in the mold cavity 8. The output end of the third hydraulic cylinder 3 is connected to a push plate 20 inside the mold cavity 8. The push plate 20 is used to push the graphite spread out by the first pressure plate 4 and the second pressure plate 5 towards the bottom of the second pressure plate 5. In use, the first hydraulic cylinder 1 firstly drives the first pressure plate 4 and the second pressure plate 5, which are flush on one side, to squeeze and distribute the graphite in the mold cavity 8. At this time, one end of the first pressure plate 4 abuts against... When the push plate 20 reaches the top, the first extrusion ends. Then, the third hydraulic cylinder 3 drives the push plate 20 to push the graphite downwards to the second pressure plate 5 again, forming a closed chamber with the first pressure plate 4 and the mold cavity 8. Then, the second hydraulic cylinder 2 drives the second pressure plate 5 to extrude the graphite again. After the extrusion ends, the push plate 20 is retracted to reserve space for the graphite to release internal stress. At this time, the internal stress generated by the extrusion is released. Then, the first pressure plate 4 is retracted. At this time, the internal stress in the graphite is fully released, thus avoiding the occurrence of arching and breakage in the middle.

[0035] The mold cavity 8 is located directly below the second pressure plate 5 and is equipped with a top plate 9. The support 6 is located at the bottom of the top plate 9 and is equipped with a demolding drive cylinder 10. After the secondary extrusion is completed, the demolding drive cylinder 10 drives the top plate 9 to push the obtained graphite brick out of the mold cavity 8 to achieve demolding.

[0036] The mold 7 has a carrier plate 11 on one side along its length. The carrier plate 11 has a feeding frame 12. The feeding frame 12 is a structure of four vertical plates connected end to end. A feeding drive cylinder 13 is provided on one side of the feeding frame 12. In use, graphite is first fed into the feeding frame 12, and then the feeding drive cylinder 13, in conjunction with the carrier plate 11, transfers the graphite into the mold cavity 8.

[0037] As a graphite brick pressing device, the second pressure plate 5 is provided with guide posts 14 at the four corners of the side near the second hydraulic cylinder 2. The first pressure plate 4 is provided with guide holes at the positions corresponding to the guide posts 14. The guide holes cooperate with the guide posts 14 to improve the stability of the second pressure plate 5 when it is raised and lowered and the accuracy of its retraction into the receiving port.

[0038] As a graphite brick pressing device, the first pressing plate 4 is provided with two mounting frames 16 at the end away from the second pressing plate 5. Each mounting frame 16 is provided with a counterweight 17. Due to the presence of the second hydraulic cylinder 2, the balance of the entire first pressing plate 4 relative to the first hydraulic cylinder 1 is relatively weak. Therefore, the weight of the first pressing plate 4 is balanced by the two counterweights 17 to ensure that the force exerted by the first pressing plate 4 on the graphite in the mold cavity 8 is balanced.

[0039] As a graphite brick pressing device, the push plate 20 is provided with guide blocks 19 at both ends, and the mold cavity 8 is provided with guide grooves 18 corresponding to the positions of the guide blocks 19. The guide grooves 18 cooperate with the guide blocks 19 to improve the directionality of the push plate 20 moving into the mold cavity 8 and the fit between the bottom of the push plate 20 and the mold cavity 8, so as to ensure that the push plate 20 completely gathers the graphite below the second pressing plate 5.

[0040] As a graphite brick pressing device, in order to prevent deformation when the carrier plate 11 is connected to the mold 7, reduce labor intensity and facilitate transportation, the carrier plate 11 is provided with multiple insertion holes on the side close to the mold 7. At the same time, the mold 7 is provided with multiple insertion posts 21 at the corresponding positions of the insertion holes. When in use, the carrier plate 11 can be connected simply by cooperating with the insertion holes and insertion posts 21.

[0041] As a graphite brick pressing device, in order to ensure that the first pressing plate 4 has a full effect on the graphite, the height of the push plate 20 is less than the depth of the mold cavity 8. This allows the first pressing plate 4 to have sufficient extrusion depth in the mold cavity 8. When the first pressing plate 4 is pressed down, one end abuts against the top of the push plate 20, and the first extrusion ends. At this time, the graphite thickness is equal to the height of the push plate 20.

[0042] It should be noted that the feeding drive cylinder and the demolding drive cylinder 10 are specifically one of a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

[0043] In use, firstly, the third hydraulic cylinder 3 retracts the push plate 20 to the end of the mold cavity 8. Then, loose graphite is added into the feeding frame 12. Next, the feeding drive cylinder 13 is activated to drive the feeding frame 12 to transfer the graphite into the mold cavity 8. When the feeding frame 12 and the end of the carrier plate 11 are misaligned, the graphite automatically falls into the mold cavity 8. Then, the first hydraulic cylinder 1 is activated to simultaneously drive the first pressure plate 4 and the second pressure plate 5 to perform the first compression of the graphite, distributing the graphite compression throughout the mold cavity 8 to reduce the graphite thickness and reduce the stroke of the first hydraulic cylinder 1. During the compression process, when the first pressure plate 4 abuts against the push plate... When the graphite reaches the top of the second pressure plate 5, the extrusion stops. Then, the third hydraulic cylinder 3 drives the push plate 20 to push the graphite towards the bottom of the second pressure plate 5. When the push plate 20 reaches the end of the second pressure plate 5, the pushing stops. Then, the second hydraulic cylinder 2 drives the second pressure plate 5 to extrude the graphite a second time. During the extrusion process, internal stress will be generated inside the graphite. Then, the third hydraulic cylinder 3 is used to retract the push plate 20 to leave space for the graphite to release the internal stress. Finally, the first hydraulic cylinder 1 is used to retract the first pressure plate 4 and the second pressure plate 5. Then, the demolding drive cylinder 10 drives the top plate 9 to push the obtained graphite brick out of the mold cavity 8 to achieve demolding.

[0044] It should be noted that in order to prevent the first hydraulic cylinder 1 from rotating during operation, the first hydraulic cylinder 1 in this utility model is an anti-rotation hydraulic cylinder, which can be an internally guided anti-rotation hydraulic cylinder disclosed in the patent application number 201810668697.8.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape and principle of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A graphite brick pressing device, comprising a die (7) for graphite forming and an extrusion unit, characterized in that: The extrusion unit comprises a first hydraulic cylinder (1), a first pressing plate (4) is provided at the output end of the first hydraulic cylinder (1), a second hydraulic cylinder (2) is provided at one end of the first pressing plate (4), a receiving opening is provided at the position of the first pressing plate (4) at the second hydraulic cylinder (2), a second pressing plate (5) is provided in the receiving opening, one side of the second pressing plate (5) is connected to the output end of the second hydraulic cylinder (2), and one side of the first pressing plate (4) and the second pressing plate (5) are coplanar when the output end of the first hydraulic cylinder (1) is extended; The mold (7) is provided with a mold cavity (8), and the mold cavity (8) just accommodates the first pressing plate (4) and the second pressing plate (5); a third hydraulic cylinder (3) is provided at one end of the mold cavity (8) away from the second pressing plate (5); the movement direction of the third hydraulic cylinder (3) is perpendicular to that of the first hydraulic cylinder (1); and the output end of the third hydraulic cylinder (3) is located in the mold cavity (8) and is provided with a push plate (20); The mold cavity (8) is provided with a top plate (9) located directly below the second pressing plate (5), and a demoulding drive cylinder (10) is provided on one side of the top plate (9).

2. The graphite brick pressing device according to claim 1, characterized in that: The mold (7) is provided with a carrier plate (11) on one side in the length direction of the mold cavity (8), a feeding frame (12) is provided on one side of the carrier plate (11), and a feeding drive cylinder (13) is provided at one end of the feeding frame (12).

3. The graphite brick pressing device according to claim 1, characterized in that: The second pressing plate (5) is provided with guide columns (14) at four corners on one side close to the second hydraulic cylinder (2), and the first pressing plate (4) is provided with guide holes at positions corresponding to the guide columns (14).

4. The graphite brick pressing device according to claim 1, characterized in that: Guide blocks (19) are provided at both ends of the push plate (20), and guide grooves (18) are provided at positions of the mold cavity (8) corresponding to the guide blocks (19), and the guide blocks (19) cooperate with the guide grooves (18).

5. The graphite brick pressing device according to claim 1, characterized in that: At least one mounting frame (16) is provided at one end of the first pressing plate (4) away from the second pressing plate (5), and a counterweight block (17) is provided in the mounting frame (16).

6. The graphite brick pressing device according to claim 2, characterized in that: A plurality of insertion holes are provided on a side of the carrier plate (11) close to the mold (7), and insertion posts (21) are provided at positions of the mold (7) corresponding to the insertion holes, and the insertion posts (21) cooperate with the insertion holes.

7. The graphite brick pressing device according to claim 1, characterized in that: A bracket (6) is provided at the bottom of the mold (7), and the demoulding drive cylinder (10) is arranged in the bracket (6).

8. The graphite brick pressing device according to claim 1, characterized in that: The height of the push plate (20) is less than the depth of the mold cavity (8).

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