Process for the production of end-press plates

Abstract

The application discloses a preparation process of an end pressing plate and relates to the technical field of end pressing plate production.The preparation process comprises the following steps: step one, weighing and proportioning raw materials;step two, adding the proportioned raw materials into a medium-frequency electric furnace by means of magnet adsorption;step three, melting the raw materials in the medium-frequency electric furnace; and step four, pouring the molten steel into a mold of a casting device.The end pressing plate body is produced by the casting process, thereby avoiding the waste of steel caused by cutting steel plates, the first inner convex part and the second inner convex part are formed by the upper mold, the end pressing plate body is formed with the first inner concave cavity and the second inner concave cavity, the use of steel is further reduced, the purpose of saving materials is achieved, the weight of the end pressing plate body is effectively reduced, the cooling efficiency is reduced by the cooperation of the upper mold, the lower mold, the ejection assembly and the connecting assembly, the demolding of the end pressing plate body is facilitated, and the production efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of end plate manufacturing technology, specifically the preparation process of end plates. Background Technology

[0002] In recent years, the development and utilization of hydrogen energy has entered a substantial development stage. With the continuous improvement of fuel cell technology, emerging industries centered on fuel cells will maximize the clean utilization of hydrogen energy. This is mainly reflected in the industrialization of hydrogen fuel cell vehicles, distributed power generation, hydrogen fuel cell forklifts, and emergency power supplies. The production of hydrogen requires hydrogen production companies. The hydrogen electrolyzer is an important piece of equipment in the hydrogen production process and is known as the "heart" of hydrogen production. The end plate is a key reinforcing component of the hydrogen electrolyzer and plays an important role.

[0003] Traditional end plates are generally made by cutting a flat steel plate. The cutting and grinding are carried out according to the shape and structure of the end plate body. Furthermore, the shaft connection between the two end plate bodies requires punching operations, which results in low production efficiency and a large amount of steel waste. Therefore, in order to improve production efficiency and avoid steel waste, a new manufacturing process for end plates is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a manufacturing process for end pressure plates in order to solve the problem of low production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: the manufacturing process of the end pressure plate includes the following steps: Step 1: Weigh and mix the raw materials according to the specified proportions; Step 2: Add the prepared raw materials to the medium-frequency electric furnace using a magnetic adsorption method; Step 3: Melt the raw materials in a medium-frequency electric furnace for 1.5 hours at a temperature of 1650-1700℃. Step 4: Pour the molten steel into the mold of the casting device and wait for the steel to cool and solidify; Step 5: Clean and trim the shaped parts. Step Six: Spray the shaped end pressure plate with anti-rust paint; In step four, the casting device includes an upper mold and a lower mold. The upper mold is raised and lowered by four hydraulic rods. The outer wall of the lower mold is fixed with an inlet tee and an outlet tee. The inlet tee and outlet tee are connected to both ends of the lower cooling pipe inside the lower mold. The bottom end of the inlet tee is connected to an external cooling water tank through an inlet pipe, and a water pump delivers cooling water from the external cooling water tank to the lower cooling pipe. The bottom end of the outlet tee is connected to the external cooling water tank through an outlet pipe. The outer wall of the upper mold is fixed with an upper inlet pipe and an upper outlet pipe. The upper inlet pipe and upper outlet pipe are respectively connected to both ends of the upper cooling pipe inside the upper mold. When the four hydraulic rods drive the upper mold and the lower mold to close, the top end of the upper inlet pipe is sleeved with the top end of the inlet tee, and the top end of the upper outlet pipe is sleeved with the top end of the outlet tee.

[0006] As a further embodiment of the present invention: the bottom of the upper mold is formed with a forming cavity, and the top of the forming cavity is formed with a plurality of first inner protrusions, a plurality of second inner protrusions, and a plurality of upper forming pillars. The first inner protrusions are used to form a second inner concave cavity inside the end pressure plate body, and the second inner protrusions are used to form a first inner concave cavity inside the end pressure plate body. The upper forming pillars are used to form stepped holes inside the end pressure plate body. The upper mold is formed with an upper cooling cavity below the upper cooling pipe. The upper cooling pipe is connected to the upper cooling cavity through an upper water inlet groove and an upper water outlet groove. The upper cooling cavity is formed with a plurality of inner grooves and a plurality of upper pillar grooves. The plurality of inner grooves are formed inside the plurality of first inner protrusions and the plurality of second inner protrusions, and the plurality of upper pillar grooves are respectively formed inside the plurality of upper forming pillars.

[0007] As a further embodiment of the present invention: the top of the lower mold is formed with a casting part that matches the forming cavity, the top of the casting part is formed with a plurality of lower forming pillars, the plurality of lower forming pillars cooperate with a plurality of upper forming pillars to form stepped holes, the interior of the lower mold is formed with a lower cooling cavity above the lower cooling pipe, the lower cooling pipe is connected to the lower cooling cavity through a lower water inlet groove and a lower water outlet groove, the top of the lower cooling cavity is formed with a plurality of lower pillar grooves, the plurality of lower pillar grooves are respectively opened inside the plurality of lower forming pillars.

[0008] As a further embodiment of the present invention: the outer wall of the upper mold is symmetrically formed with four ear plates, the output ends of the four hydraulic rods are respectively fixedly connected to the four ear plates, and the top of the upper mold is formed with a feeding hopper, which is connected to the forming cavity through a feeding pipe.

[0009] As a further embodiment of the present invention: the lower mold is fixed to the top of the fixed column on the outer wall of the mounting platform, and the top of the mounting platform is provided with an ejection assembly for ejecting the body of the ejection end pressure plate. The ejection assembly includes an ejection plate and a plurality of ejection columns. The plurality of ejection columns are fixed to the top of the ejection plate and penetrate the lower mold. The interior of the lower mold is provided with a plurality of ejection slots for the ejection columns to move.

[0010] As a further embodiment of the present invention: the output end of the hydraulic rod is also connected to a connecting component for driving the ejector column to move up and down; The connecting assembly includes a lifting rod, a guide column, and a limiting plate. The lifting rod is fixed to the output end of the hydraulic rod, the guide column is fixed to the lifting rod, the limiting plate is fixed to the top of the guide column, and one end of the limiting plate is fixedly connected to the lifting rod. The guide column passes through the ejector column.

[0011] As a further embodiment of the present invention: the outer wall of the ejector column is symmetrically formed with two ends, and a connecting groove for sliding two guide columns is opened inside one end, and the lifting rod has a "Z" shaped structure.

[0012] As a further embodiment of the present invention: ceramic sealing rings are provided at the connection between the top end of the outlet tee and the upper outlet pipe, and at the connection between the top end of the inlet tee and the upper inlet pipe.

[0013] The end pressure plate manufactured by the process described in this invention includes an end pressure plate body, two mounting feet arranged below the end pressure plate body, and two mounting plates arranged above the end pressure plate. Mounting holes are provided on both the mounting feet and the mounting plates. The end pressure plate body is disc-shaped, and three or more second concave cavities arranged in a ring array are provided at the center of the front side of the end pressure plate body. Several first concave cavities are arranged in a ring array around each of the second concave cavities. Several stepped holes are arranged in a ring array on the outer periphery of the end pressure plate body.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the end plate body is produced by casting process, avoiding the waste of steel caused by cutting steel plates; the first inner convex part and the second inner convex part are formed by the upper mold, so that the end plate body has the first inner concave cavity and the second inner concave cavity, which further reduces the steel material consumption, achieves the purpose of saving materials, and effectively reduces the weight of the end plate body; through the cooperation of the upper mold, lower mold, ejection component and connecting component, the cooling efficiency is reduced while the demolding process of the end plate body is facilitated, which further improves the production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the casting device of the present invention; Figure 2 This is a schematic diagram of the demolding state structure of the casting device of the present invention; Figure 3 This is a bottom view of the mold of the present invention; Figure 4 This is a cross-sectional view of the mold of the present invention.

[0016] Figure 5 This is another cross-sectional view of the mold of the present invention.

[0017] Figure 6 This is a schematic diagram showing the connection between the hydraulic rod and the ejector assembly of the present invention.

[0018] Figure 7 This is a cross-sectional view of the mold of the present invention.

[0019] Figure 8 This is another cross-sectional view of the mold of the present invention; Figure 9 This is a three-dimensional structural diagram (front view) of the end pressure plate of the present invention. Figure 10 This is a three-dimensional structural diagram (back side) of the end pressure plate of the present invention.

[0020] In the diagram: 1. Upper mold; 101. Feed hopper; 102. Ear plate; 103. Molding cavity; 104. First inner protrusion; 105. Second inner protrusion; 106. Upper molding pillar; 107. Feed pipe; 108. Upper cooling pipe; 109. Upper cooling cavity; 110. Inner groove; 111. Upper pillar groove; 112. Upper water outlet groove; 113. Upper water inlet groove; 2. Lower mold; 201. Lower cooling pipe; 202. Ejector groove; 203. Lower cooling cavity; 204. Lower molding pillar; 205. Lower pillar groove; 206. Lower water inlet 1. Channel; 207. Lower water outlet channel; 3. Mounting platform; 301. Fixed column; 4. Ejection assembly; 401. Ejection plate; 402. Ejection column; 5. Hydraulic rod; 6. Connecting assembly; 601. Lifting rod; 602. Guide column; 603. Limiting plate; 701. Inlet tee pipe; 702. Outlet tee pipe; 801. Upper inlet pipe; 802. Upper outlet pipe; 9. End pressure plate body; 901. Stepped hole; 902. First concave cavity; 903. Second concave cavity; 904. Mounting leg; 905. Mounting support plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-10 In this embodiment of the invention, the manufacturing process of the end pressure plate includes the following steps: Step 1: Weigh and mix the raw materials (including but not limited to scrap steel, ferrosilicon, ferromanganese, ferromolybdenum, and ferrovanadium) according to the specified proportions; Step 2: Add the prepared raw materials to the medium-frequency electric furnace using a magnetic adsorption method; Step 3: Melt the raw materials in a medium-frequency electric furnace for 1.5 hours at a temperature of 1650-1700℃. Step 4: Pour the molten steel into the mold of the casting device and wait for the steel to cool and solidify; Step 5: Clean and trim the shaped parts. Step Six: Spray the processed end pressure plate with anti-rust paint (considering different product application scenarios, different spraying processes and paint finishes can be used. After spraying, conduct an inspection. If the inspection is qualified, it is ready for shipment. If the inspection is unqualified, rework and repair are required).

[0023] The end pressure plate manufactured by the process described in this invention includes an end pressure plate body 9, with two mounting feet 904 below the end pressure plate body 9 and two mounting plates 905 above the end pressure plate. Mounting holes are provided on both the mounting feet and the mounting plates. The end pressure plate body 9 is disc-shaped. Three or more second concave cavities 903 are arranged in a ring array at the center of the front of the end pressure plate body 9, and several first concave cavities 902 are arranged in a ring array around each of the second concave cavities 903. Several stepped holes 901 are arranged in a ring array on the outer periphery of the end pressure plate body 9.

[0024] In step four, the casting device includes an upper mold 1 and a lower mold 2. The upper mold 1 is raised and lowered by four hydraulic rods 5. The outer wall of the lower mold 2 is fixed with an inlet tee pipe 701 and an outlet tee pipe 702. The inlet tee pipe 701 and the outlet tee pipe 702 are connected to both ends of the lower cooling pipe 201 inside the lower mold 2. The bottom end of the inlet tee pipe 701 is connected to an external cooling water tank through an inlet pipe, and a water pump delivers cooling water from the external cooling water tank to the lower cooling pipe 201. The bottom end of the outlet tee pipe 702 is connected to the external cooling water tank through an outlet pipe. The upper mold 1 is fixed with an upper water inlet pipe 801 and an upper water outlet pipe 802. The upper water inlet pipe 801 and the upper water outlet pipe 802 are respectively connected to the two ends of the upper cooling pipe 108 inside the upper mold 1. When the four hydraulic rods 5 drive the upper mold 1 and the lower mold 2 to close the mold, the upper water inlet pipe 801 is sleeved with the top end of the water inlet tee pipe 701, and the upper water outlet pipe 802 is sleeved with the top end of the water outlet tee pipe 702. Ceramic sealing rings are provided at the connection between the top end of the water outlet tee pipe 702 and the upper water outlet pipe 802, as well as at the connection between the top end of the water inlet tee pipe 701 and the upper water inlet pipe 801.

[0025] In this embodiment: the upper mold 1 is driven to move downward by four hydraulic rods 5, so that the upper mold 1 and the lower mold 2 can be closed. At the same time, the upper water inlet pipe 801 is connected to the water inlet tee pipe 701, and the upper water outlet pipe 802 is connected to the water outlet tee pipe 702. After the casting is completed, the cooling water from the external cooling water tank is transported to the water inlet tee pipe 701 through the water inlet pipe by the water pump. The water inlet tee pipe 701 transports the cooling water to the lower cooling pipe 201 and the upper water inlet pipe 801 respectively. After the lower cooling pipe 201 cools down the lower mold 2, the heated cooling water flows back to the external cooling water tank through the water outlet tee pipe 702 and the water outlet pipe. Through the cooperation of the above parts, the upper mold 1 and the lower mold 2 can be cooled down synchronously.

[0026] Please refer to this carefully. Figure 2 , Figure 3 , Figure 4 and Figure 5 The upper mold 1 has a forming cavity 103 formed at the bottom of its interior. The top of the forming cavity 103 has a plurality of first inner protrusions 104, a plurality of second inner protrusions 105, and a plurality of upper forming pillars 106. The first inner protrusions 104 are used for the second inner concave cavity 903 inside the forming end pressure plate body 9. The second inner protrusions 105 are used for the first inner concave cavity 902 inside the forming end pressure plate body 9. The upper forming pillars 106 are used for the stepped hole 901 inside the forming end pressure plate body 9. The upper mold 1 has an upper cooling cavity 109 formed below the upper cooling pipe 108. The upper cooling pipe 108 is connected to the upper cooling cavity 109 through the upper water inlet groove 113 and the upper water outlet groove 112. The upper cooling cavity 109 has a plurality of inner grooves 110 and a plurality of upper pillar grooves 111 formed inside the upper cooling cavity 109. The plurality of inner grooves 110 are formed inside the plurality of first inner protrusions 104 and the plurality of second inner protrusions 105. The plurality of upper pillar grooves 111 are formed inside the plurality of upper forming pillars 106 respectively.

[0027] In this embodiment: After the cooling water enters the upper cooling pipe 108 through the upper inlet pipe 801, the upper cooling pipe 108 cools the upper mold 1. At the same time, the cooling water enters the upper cooling chamber 109 through the upper inlet groove 131, and enters multiple inner grooves 110 and upper column grooves 111 through the upper cooling chamber 109. While the upper cooling chamber 109 further cools the upper mold 1, the inner grooves 110 cool the first inner protrusion 104 and the second inner protrusion 105. The cooling water in the upper column groove 111 cools the first inner protrusion 104, further improving the cooling efficiency of the end pressure plate body 9. The heated cooling water flows back to the upper cooling pipe 108 through the upper outlet groove 112, and then back to the cooling water tank.

[0028] Please refer to this carefully. Figure 2 , Figure 7 and Figure 8 The top of the lower mold 2 is formed with a casting part that matches the forming cavity 103. The top of the casting part is formed with multiple lower forming pillars 204. The multiple lower forming pillars 204 cooperate with multiple upper forming pillars 106 to form stepped holes 901. The interior of the lower mold 2 is formed above the lower cooling pipe 201 and has a lower cooling cavity 203. The lower cooling pipe 201 is connected to the lower cooling cavity 203 through the lower water inlet groove 206 and the lower water outlet groove 207. The top of the lower cooling cavity 203 is formed with multiple lower pillar grooves 205. The multiple lower pillar grooves 205 are respectively opened inside the multiple lower forming pillars 204.

[0029] In this embodiment: After cooling water enters the lower cooling pipe 201 through the inlet tee pipe 701, it cools the lower mold 2 through the lower cooling pipe 201. The heated cooling water then flows back to the cooling water tank through the outlet tee pipe 702. At the same time, the cooling water in the lower cooling pipe 201 enters the lower cooling chamber 203 through the lower inlet groove 206. The cooling water in the lower cooling chamber 203 fills the lower column groove 205, so that the lower column groove 205 cools the lower forming column 204. After the cooling water in the lower cooling chamber 203 is heated, it flows back to the lower cooling pipe 201 through the lower outlet groove 207. Through the cooperation of the above parts, efficient cooling and heat dissipation of the lower mold 2 are achieved.

[0030] Please refer to this carefully. Figure 2 , Figure 3 The outer wall of the upper mold 1 is symmetrically formed with four ear plates 102. The output ends of the four hydraulic rods 5 are fixedly connected to the four ear plates 102 respectively. The top of the upper mold 1 is formed with a feeding hopper 101. The feeding hopper 101 is connected to the forming cavity 103 through the feeding pipe 107.

[0031] In this embodiment: molten iron flows into the forming cavity 103 through the feed hopper 101 and the feed pipe 107. When the molten iron fills the forming cavity 103, the end pressure plate body 9 formed in the forming cavity 103 is cooled down by simultaneously cooling the upper mold 1 and the lower mold 2.

[0032] Please refer to this carefully. Figure 1 , Figure 2 The lower mold 2 is fixed to the top of the fixed column 301 on the outer wall of the mounting platform 3. The top of the mounting platform 3 is equipped with an ejection assembly 4 for ejecting the end pressure plate body 9. The ejection assembly 4 includes an ejection plate 401 and multiple ejection columns 402. The multiple ejection columns 402 are fixed to the top of the ejection plate 401 and penetrate the lower mold 2. The interior of the lower mold 2 is provided with multiple ejection slots 202 for the ejection columns 402 to move.

[0033] In this embodiment: Initially, the ejector plate 401 is located at the top of the mounting platform 3, and the top of the ejector column 402 is at the same horizontal plane as the top of the mold part. The ejector plate 401 moves upward, causing multiple ejector columns 402 to move upward synchronously, ejecting the end pressure plate body 9 formed at the top of the mold part and demolding it, which facilitates the transfer operation of forklifts and other lifting equipment.

[0034] Please refer to this carefully. Figure 1 , Figure 2 and Figure 6 The output end of the hydraulic rod 5 is also connected to a connecting component 6 for driving the ejector column 402 to move up and down; The connecting assembly 6 includes a lifting rod 601, a guide post 602, and a limiting plate 603. The lifting rod 601 is fixed to the output end of the hydraulic rod 5, the guide post 602 is fixed to the lifting rod 601, and the limiting plate 603 is fixed to the top of the guide post 602. One end of the limiting plate 603 is fixedly connected to the lifting rod 601. The guide post 602 passes through the ejector post 402. The outer wall of the ejector post 402 is symmetrically formed with two ends. The interior of one end has a connecting groove for sliding two guide posts 602. The lifting rod 601 has a "Z" shaped structure.

[0035] In this embodiment: the upper mold 1 and the lifting rod 601 are driven to move upward synchronously by the hydraulic rod 5. The guide column 602 slides along the inner wall of the connecting groove at the end, so that after the upper mold 1 and the lower mold 2 are separated, the lower top of the lifting rod 601 contacts the bottom of the end, so that the lifting rod 601 drives the ejector plate 401 to move upward, so that the ejector plate 401 drives the ejector column 402 to move upward, so that the ejector column 402 pushes the end pressure plate body 9 to move upward for demolding.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. The manufacturing process of the end pressure plate, characterized in that, It includes the following steps: Step 1: Weigh and mix the raw materials according to the specified proportions; Step 2: Add the prepared raw materials to the medium-frequency electric furnace using a magnetic adsorption method; Step 3: Melt the raw materials in a medium-frequency electric furnace for 1.5 hours at a temperature of 1650-1700℃. Step 4: Pour the molten steel into the mold of the casting device and wait for the steel to cool and solidify; Step 5: Clean and trim the finished parts. Step Six: Spray the shaped end pressure plate with anti-rust paint; The casting device in step four includes an upper mold (1) and a lower mold (2). The upper mold (1) is raised and lowered by four hydraulic rods (5). The outer wall of the lower mold (2) is fixed with an inlet tee pipe (701) and an outlet tee pipe (702). The inlet tee pipe (701) and the outlet tee pipe (702) are connected to both ends of the lower cooling pipe (201) inside the lower mold (2). The bottom end of the inlet tee pipe (701) is connected to an external cooling water tank through an inlet pipe, and a water pump delivers the cooling water from the external cooling water tank to the lower cooling pipe (201). The bottom end of the outlet tee (702) is connected to the external cooling water tank through the outlet pipe. The outer wall of the upper mold (1) is fixed with an upper inlet pipe (801) and an upper outlet pipe (802). The upper inlet pipe (801) and the upper outlet pipe (802) are respectively connected to the two ends of the upper cooling pipe (108) inside the upper mold (1). When the four hydraulic rods (5) drive the upper mold (1) and the lower mold (2) to close the mold, the top end of the upper inlet pipe (801) is sleeved with the top end of the inlet tee (701), and the top end of the upper outlet pipe (802) is sleeved with the top end of the outlet tee (702). The upper mold (1) has a forming cavity (103) formed at its bottom. The top of the forming cavity (103) has multiple first inner protrusions (104), multiple second inner protrusions (105), and multiple upper forming pillars (106). The first inner protrusions (104) are used to form the second inner cavity (903) inside the end pressure plate body (9). The second inner protrusions (105) are used to form the first inner cavity (902) inside the end pressure plate body (9). The upper forming pillars (106) are used to form the stepped hole (901) inside the end pressure plate body (9). The upper mold (1) 1) An upper cooling cavity (109) is formed below the upper cooling pipe (108). The upper cooling pipe (108) is connected to the upper cooling cavity (109) through an upper water inlet groove (113) and an upper water outlet groove (112). The upper cooling cavity (109) has multiple inner grooves (110) and multiple upper column grooves (111) formed inside. The multiple inner grooves (110) are formed inside multiple first inner protrusions (104) and multiple second inner protrusions (105). The multiple upper column grooves (111) are respectively formed inside multiple upper forming columns (106).

2. The manufacturing process of the end pressure plate according to claim 1, characterized in that, The top of the lower mold (2) is formed with a casting part that matches the forming cavity (103). The top of the casting part is formed with multiple lower forming pillars (204). The multiple lower forming pillars (204) cooperate with multiple upper forming pillars (106) to form a stepped hole (901). The interior of the lower mold (2) is formed above the lower cooling pipe (201) and has a lower cooling cavity (203). The lower cooling pipe (201) is connected to the lower cooling cavity (203) through a lower water inlet groove (206) and a lower water outlet groove (207). The top of the lower cooling cavity (203) is formed with multiple lower column grooves (205). The multiple lower column grooves (205) are respectively opened inside the multiple lower forming pillars (204).

3. The manufacturing process of the end pressure plate according to claim 2, characterized in that, The outer wall of the upper mold (1) is symmetrically formed with four ear plates (102), and the output ends of the four hydraulic rods (5) are respectively fixedly connected to the four ear plates (102). The top of the upper mold (1) is formed with a feeding hopper (101), and the feeding hopper (101) is connected to the forming cavity (103) through the feeding pipe (107).

4. The manufacturing process of the end pressure plate according to claim 1, characterized in that, The lower mold (2) is fixed to the top of the column (301) on the outer wall of the mounting platform (3). The top of the mounting platform (3) is equipped with an ejection assembly (4) for ejecting the end pressure plate body (9). The ejection assembly (4) includes an ejection plate (401) and multiple ejection columns (402). The multiple ejection columns (402) are fixed to the top of the ejection plate (401). The multiple ejection columns (402) penetrate the lower mold (2). The interior of the lower mold (2) is provided with multiple ejection slots (202) for the ejection columns (402) to move.

5. The manufacturing process of the end pressure plate according to claim 1, characterized in that, The output end of the hydraulic rod (5) is also connected to a connecting component (6) for driving the ejector column (402) to move up and down. The connecting assembly (6) includes a lifting rod (601), a guide post (602), and a limiting plate (603). The lifting rod (601) is fixed to the output end of the hydraulic rod (5). The guide post (602) is fixed to the lifting rod (601). The limiting plate (603) is fixed to the top of the guide post (602), and one end of the limiting plate (603) is fixedly connected to the lifting rod (601). The guide post (602) passes through the ejector post (402).

6. The manufacturing process of the end pressure plate according to claim 5, characterized in that, The outer wall of the ejector column (402) is symmetrically formed with two ends. A connecting groove for sliding two guide columns (602) is opened inside one end. The lifting rod (601) has a "Z" shaped structure.

7. The manufacturing process of the end pressure plate according to claim 1, characterized in that, Ceramic sealing rings are provided at the connection between the top end of the outlet tee (702) and the upper outlet pipe (802) and at the connection between the top end of the inlet tee (701) and the upper inlet pipe (801).

8. The end pressure plate prepared by the process according to any one of claims 1-7, characterized in that, The device includes an end plate body (9), with two mounting feet (904) below the end plate body (9) and two mounting plates (905) above the end plate. Mounting holes are provided on both the mounting feet and the mounting plates. The end plate body (9) is disc-shaped. Three or more second concave cavities (903) in a ring array are provided at the center of the front of the end plate body (9). Several first concave cavities (902) are arranged in a ring array around each second concave cavity (903). Several stepped holes (901) are arranged in a ring array on the outer periphery of the end plate body (9).

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