Powder metallurgy die

Abstract

The utility model relates to the technical field of powder metallurgy, and discloses a powder metallurgy die which comprises a supporting mechanism, a heat dissipation mechanism, a sealing mechanism and a female die mechanism, the supporting mechanism comprises a supporting seat and a fixing seat, and the bottom of the fixing seat is detachably connected with the top of the supporting seat through a bolt; and the heat dissipation mechanism comprises a water tank, a circulation groove and drainage pipes, the water tank is fixedly installed on the outer wall of the fixing base, the circulation groove is formed in the middle of the top of the fixing base, and one ends of the multiple drainage pipes are in threaded connection to the two sides of the outer wall of the fixing base correspondingly. According to the powder metallurgy die, through cooperative arrangement of the drainage pipe and the circulating groove, circulating circulation of cooling liquid can be directly formed around the sealing mechanism, and then heat generated by long-time pressing of the die is dissipated outwards in time through the large specific heat capacity of the cooling liquid; and heat exchange is utilized to ensure that the whole device is in a proper temperature condition.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, and specifically to a powder metallurgy mold. Background Technology

[0002] In modern manufacturing, powder metallurgy is an important component manufacturing method widely used in many fields such as machinery, automobiles, aerospace, and electronics. It involves pressing metal powder or a mixture of non-metal powder and metal powder into shape, and then performing subsequent processing such as sintering to obtain products with specific shapes, properties, and precision requirements.

[0003] Traditional powder metallurgy molds face a significant problem in actual production: during prolonged and continuous pressing operations, the mold accumulates heat due to intense friction between the powder and the mold, as well as plastic deformation of the powder under high pressure. This heat accumulation causes the mold temperature to gradually rise, and abnormal temperature increases can lead to a series of adverse consequences. First, excessively high temperatures alter the mechanical properties of the mold material, such as reducing the mold's hardness and strength, resulting in accelerated wear and significantly shortening its lifespan. This not only increases the frequency and cost of mold replacement but may also affect the continuity and efficiency of production. Second, uneven temperature distribution can generate thermal stress in the mold, which, over time, can lead to deformation or even cracking and permanent damage, severely affecting the mold's precision and the consistency of pressed product quality. Furthermore, for some temperature-sensitive powder material systems, high mold temperatures may affect the physicochemical properties of the powder, thereby altering the microstructure of the pressed preform and the performance of the final sintered product, such as density and grain size, failing to meet the stringent performance stability requirements of high-end products. Utility Model Content

[0004] The purpose of this invention is to provide a powder metallurgy mold that can dissipate the heat generated during long-term pressing in a timely manner, thereby reducing the impact of temperature changes on the mold and ensuring the performance of the pressed product.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a powder metallurgy mold, including a support mechanism, a heat dissipation mechanism, a sealing mechanism, and a die mechanism, wherein:

[0007] The support mechanism includes a support base and a fixed base, wherein the bottom of the fixed base is detachably connected to the top of the support base by bolts;

[0008] The heat dissipation mechanism includes a water tank, a flow channel, and drainage pipes. The water tank is fixedly installed on the outer wall of the fixed base. The flow channel is opened in the middle of the top of the fixed base. One end of each of the drainage pipes is threaded to both sides of the outer wall of the fixed base, and the inner wall of the drainage pipes is in communication with the inner wall of the flow channel. The other end of each of the drainage pipes is threaded to both sides of the outer wall of the water tank.

[0009] The sealing mechanism is detachably connected to the inner bottom wall of the flow channel to seal the flow channel;

[0010] The concave mold mechanism is detachably connected to the inner bottom wall of the sealing mechanism for storing and shaping powder.

[0011] Optionally, the support mechanism further includes positioning grooves, hydraulic rods, and fixing bolts. Multiple positioning grooves are respectively opened on the top of the support base, and multiple hydraulic rods are detachably connected to the inner bottom wall of the positioning grooves. The fixing bolts are threaded through the outer wall of the hydraulic rods, and one end of the fixing bolts that protrudes from the hydraulic rods is threadedly connected to the inner bottom wall of the positioning groove.

[0012] Optionally, the heat dissipation mechanism further includes water pumps and heat sinks. The multiple water pumps are respectively fixedly installed on the outer wall of the multiple drainage pipes to drive the medium inside the drainage pipes, and the multiple heat sinks are all fixedly connected to the outer wall of the water tank.

[0013] Optionally, the sealing mechanism includes a sealing seat, a protective shell, a sealing cover, and a locking block. The bottom of the sealing seat is detachably connected to the inner bottom wall of the flow channel, the top of the sealing seat is fixedly connected to the bottom of the protective shell, the sealing cover is sleeved on the upper surface of the outer surface of the protective shell, and the locking block is fixedly connected to the outer wall of the protective shell to limit the sealing cover.

[0014] Optionally, the sealing mechanism further includes sealing gaskets and fixing rods. The three sealing gaskets are respectively fixedly installed on the inner and outer rings of the sealing cover and the bottom of the sealing seat. The multiple fixing rods are respectively threaded through the top of the sealing cover. One end of the fixing rod passing through the sealing cover is inserted into the top of the sealing seat, and the other end of the fixing rod passing out of the sealing seat is threadedly connected to the inner bottom wall of the flow groove.

[0015] Optionally, the die mechanism includes a backing plate, a forming cylinder, and a top block. The bottom of the backing plate is bolted to the top of the sealing seat, and the backing plate is located inside the protective shell. The top block is slidably connected to the inner wall of the forming cylinder, and the bottom of the top block is detachably connected to the top of the hydraulic rod.

[0016] Optionally, a protective mechanism is detachably connected to the top of the fixing base. The protective mechanism includes a cover plate, fastening bolts, a guide hole, and a protective plate. The bottom of the cover plate is detachably connected to the top of the fixing base by fastening bolts. The guide hole is opened at the top of the cover plate and located above the forming cylinder. The protective plate is fixedly installed on the inner wall of the guide hole.

[0017] Optionally, the top of the protective mechanism is provided with a punch mechanism, which includes a pressure plate, a forming block and a guide rod. Multiple forming blocks are fixedly installed on the bottom of the pressure plate and are adapted to the forming cylinder. Multiple guide rods are respectively fixedly installed on the bottom of the pressure plate and located on the outside of the forming block.

[0018] This utility model provides a powder metallurgy mold, which has the following beneficial effects:

[0019] This powder metallurgy mold is supported by a support base on a fixed base. Liquid (i.e., coolant) in the water tank is transported to the flow channel through a drainage pipe. With the cooperation of the sealing mechanism and the flow channel, coolant can be circulated directly from around the sealing mechanism. Heat conduction occurs through the contact between the die mechanism and the sealing mechanism. The large specific heat capacity of the coolant is used to dissipate the heat generated by the die mechanism being pressed for a long time. The heat exchange ensures that the die mechanism is kept under suitable temperature conditions, thereby ensuring the service life of the die mechanism and the quality of the pressed product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 3 This is an exploded view of the support mechanism of this utility model;

[0023] Figure 4 This is an exploded view of the sealing mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the bottom structure of the fixing base of this utility model;

[0025] Figure 6 This is an exploded view of the die mechanism of this utility model;

[0026] Figure 7 This is a schematic diagram of the explosion-proof structure of the protective mechanism of this utility model.

[0027] Figure 8 This is a schematic diagram of the punch mechanism of this utility model.

[0028] In the diagram: 1. Support mechanism; 101. Support base; 102. Positioning groove; 103. Hydraulic rod; 104. Fixing bolt; 105. Fixing seat; 2. Heat dissipation mechanism; 201. Water tank; 202. Flow channel; 203. Drain pipe; 204. Water pump; 205. Heat sink; 3. Sealing mechanism; 301. Sealing seat; 302. Protective shell; 303. Sealing cover; 304. Clamping block; 305. Sealing gasket; 306. Fixing rod; 4. Die mechanism; 401. Pad plate; 402. Forming cylinder; 403. Top block; 5. Protective mechanism; 501. Cover plate; 502. Fastening bolt; 503. Guide hole; 504. Protective plate; 6. Punch mechanism; 601. Pressure plate; 602. Forming block; 603. Guide rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0030] Please see Figures 1 to 8 This utility model embodiment provides a mold for pressing metal powder into shape. This embodiment improves the mold's structure to enable rapid cooling. Specifically, taking metal powder pressing as an example, as a preferred solution in this embodiment, the mold is a powder metallurgy mold, capable of dissipating heat promptly after prolonged pressing.

[0031] Please see Figures 1 to 8 This utility model provides a technical solution: a powder metallurgy mold, which is mainly used in scenarios where ceramic workpieces are cut according to different needs.

[0032] It includes a support mechanism 1, a heat dissipation mechanism 2, a sealing mechanism 3, and a die mechanism 4, wherein:

[0033] The support mechanism 1 includes a support base 101 and a fixed base 105. The bottom of the fixed base 105 is detachably connected to the top of the support base 101 by bolts.

[0034] The heat dissipation mechanism 2 includes a water tank 201, a flow channel 202, and a drain pipe 203. The water tank 201 is fixedly installed on the outer wall of the fixed base 105. The flow channel 202 is opened in the middle of the top of the fixed base 105. One end of the multiple drain pipes 203 is threaded to both sides of the outer wall of the fixed base 105, and the inner wall of the drain pipe 203 is in communication with the inner wall of the flow channel 202. The other end of the multiple drain pipes 203 is threaded to both sides of the outer wall of the water tank 201.

[0035] The sealing mechanism 3 is detachably connected to the inner bottom wall of the flow channel 202 to seal the flow channel 202;

[0036] The die mechanism 4 is detachably connected to the inner bottom wall of the sealing mechanism 3 to store and shape the powder.

[0037] In this embodiment, the support base 101 serves as the fundamental load-bearing component of the entire mold, providing a stable support platform for other mechanisms above it. This ensures that the mold will not shake or shift due to instability during operation, guaranteeing the accuracy and stability of the pressing operation. It plays a crucial role in maintaining the integrity of the overall mold structure and the precision of the pressed products. The fixed base 105 is detachably connected to the top of the support base 101 via bolts, providing an installation base for the heat dissipation mechanism 2, sealing mechanism 3, and die mechanism 4 above it. It connects and supports these mechanisms, while ensuring the relative positional accuracy between the components, providing a stable frame structure for the normal operation of the mold. The water tank 201 serves as a coolant storage container, providing a coolant source for the entire heat dissipation circulation system, ensuring sufficient coolant during long-term pressing. The flow channel 202, located at the top center of the fixed base 105, is a channel for the coolant to circulate within the mold. It surrounds the sealing mechanism 3, allowing the coolant to fully absorb the heat transferred from the sealing mechanism 3 and the die mechanism 4. Through large-area contact, efficient heat exchange is achieved, ensuring that the coolant flows evenly and stably within the flow channel 202, thus improving the heat dissipation effect. The drain pipe 203, together with the flow channel 202 and the water tank 201, forms a coolant circulation loop. The drain pipe 203 is responsible for transporting the coolant from the water tank 201 to the flow channel 202, while simultaneously returning the coolant after absorbing heat to the water tank 201 for heat dissipation and cooling. Its threaded connection facilitates installation, disassembly, and maintenance, ensuring the sealing of the connection and preventing coolant leakage.

[0038] In the above embodiments, as a preferred option, the support mechanism 1 further includes positioning grooves 102, hydraulic rods 103, and fixing bolts 104. Multiple positioning grooves 102 are respectively formed on the top of the support base 101. Multiple hydraulic rods 103 are detachably connected to the inner bottom wall of the positioning grooves 102. The fixing bolts 104 are threaded through the outer wall of the hydraulic rods 103, with one end of the fixing bolt 104 protruding from the hydraulic rod 103 and threadedly connected to the inner bottom wall of the positioning grooves 102. The positioning grooves 102, formed on the top of the support base, provide precise positioning for the installation of the hydraulic rods 103, enabling the hydraulic rods 103 to be accurately installed. Installed in a predetermined position, the hydraulic rod 103 ensures the accuracy of the force direction and position during operation, thereby making the movement of the top block 403 within the forming cylinder 402 more stable and precise, which is beneficial for achieving uniform pressing of powder. At the same time, after pressing, the extension and retraction of the hydraulic rod 103 can be used to transmit pressure to the top block 403, causing the top block to slide upward in the forming cylinder 402 and push the formed part outward, facilitating demolding. The fixing bolt 104 is used to firmly fix the hydraulic rod 103 in the positioning groove 102 to prevent instability of the hydraulic rod 103 during operation.

[0039] In the above embodiment, as a preferred solution, the heat dissipation mechanism 2 further includes a water pump 204 and heat sinks 205. Multiple water pumps 204 are respectively fixedly installed on the outer wall of multiple drainage pipes 203 to drive the medium inside the drainage pipes 203. Multiple heat sinks 205 are fixedly connected to the outer wall of the water tank 201. The water pumps 204 can provide power for the flow of coolant in the circulation loop. By driving the coolant to circulate between the water tank 201, drainage pipes 203 and flow channel 202, the transfer and dissipation of heat is accelerated, the heat dissipation capacity of the heat dissipation system is enhanced, and the driving of the water pumps 204 ensures that the coolant can circulate in the system at a suitable flow rate and flow rate to achieve efficient heat dissipation. The heat sinks 205 are fixedly connected to the outer wall of the water tank 201, which increases the contact area between the water tank 201 and the outside air and improves the heat dissipation efficiency of the water tank 201. When the coolant flows back into the water tank 201, the heat is transferred to the heat sinks 205 through the water tank wall, and the heat sinks 205 then dissipate the heat into the surrounding air.

[0040] In the above embodiments, as a preferred embodiment, the sealing mechanism 3 includes a sealing seat 301, a protective shell 302, a sealing cover 303, and a locking block 304. The bottom of the sealing seat 301 is detachably connected to the inner bottom wall of the flow channel 202, the top of the sealing seat 301 is fixedly connected to the bottom of the protective shell 302, the sealing cover 303 is sleeved on the upper surface of the outer surface of the protective shell 302, and the locking block 304 is fixedly connected to the outer wall of the protective shell 302 to limit the sealing cover 303. The bottom of the sealing seat 301 is detachably connected to the inner bottom wall of the flow channel 202, forming a sealing mechanism 3 for the protective shell 302 and the sealing cover 302. The third component provides the mounting base and, together with the protective shell 302 and the sealing cover 303, isolates the flow channel 202 from the die mechanism 4, preventing coolant leakage into the die mechanism 4 and affecting the powder pressing process. At the same time, the protective shell also participates in the sealing structure, forming a sealed space with the sealing cover 303 to prevent coolant leakage. The locking block 304 can limit the sealing cover 303 to prevent excessive displacement or detachment during installation or use, ensuring the relative position stability between the sealing cover and the protective shell, and further enhancing the reliability of the sealing structure.

[0041] In the above embodiments, as a preferred option, the sealing mechanism 3 further includes sealing gaskets 305 and fixing rods 306. The three sealing gaskets 305 are respectively fixedly installed on the inner and outer rings of the sealing cover 303 and the bottom of the sealing seat 301. The multiple fixing rods 306 are threaded through the top of the sealing cover 303. One end of the fixing rod 306 passing through the sealing cover 303 is inserted into the top of the sealing seat 301, and the other end of the fixing rod 306 passing out of the sealing seat 301 is threadedly connected to the inner bottom wall of the flow groove 202. The sealing gaskets 305 fill the tiny gaps between the sealing surfaces, further improving the sealing effect. The fixing rods 306 are used to firmly fix the sealing cover 303 to the protective shell 302 and the sealing seat 301. The fastening effect of the fixing rods 306 can provide sufficient pressure to allow the sealing gaskets 305 to fully exert their sealing effect and ensure the stability of the sealing structure. At the same time, the detachable connection of the fixing rods 306 facilitates the installation, disassembly and maintenance of the sealing cover 303 and makes it easy to inspect and clean the inside of the sealing mechanism.

[0042] In the above embodiments, as a preferred option, the die mechanism 4 includes a pad 401, a forming cylinder 402, and a top block 403. The bottom of the pad 401 is bolted to the top of the sealing seat 301, and the pad 401 is located inside the protective shell 302. The top block 403 is slidably connected to the inner wall of the forming cylinder 402, and the bottom of the top block 403 is detachably connected to the top of the hydraulic rod 103. The pad 401 provides a stable support foundation for the forming cylinder 402, and the forming cylinder 402 can be replaced individually according to the different shapes of the stamped workpiece, so that the device can be adapted to different usage requirements, thereby improving the applicability of the device. The forming cylinder 402 is the key cavity for powder pressing molding. The powder is pressed into a blank of a predetermined shape inside it. After pressing, the top block 403 moves upward inside the forming cylinder under the push of the hydraulic rod, applying an upward thrust to the workpiece, so that the workpiece is pushed upward and made easy for the operator to pick up.

[0043] In the above embodiment, as a preferred solution, a protective mechanism 5 is detachably connected to the top of the fixed base 105. The protective mechanism 5 includes a cover plate 501, fastening bolts 502, guide holes 503, and a protective plate 504. The bottom of the cover plate 501 is detachably connected to the top of the fixed base 105 by fastening bolts 502. The guide hole 503 is opened at the top of the cover plate 501 and located above the forming cylinder 402. The protective plate 504 is fixedly installed on the inner side wall of the guide hole 503. The cover plate 501 provides protection for the top of the mold and also plays a certain role in protecting the operator, preventing contact with moving parts or high-temperature parts inside the mold due to misoperation. The fastening bolts 502 are used to firmly fix the cover plate 501 on the fixed base, ensuring a tight connection between the cover plate 501 and the fixed base 105, and preventing the cover plate 501 from loosening or falling off during operation. The guide hole 503 enables the punch mechanism 6 to accurately align with the forming cylinder 402 during the pressing process, ensuring uniform transmission of pressing force and consistent quality of the pressed product.

[0044] In the above embodiment, as a preferred solution, the top of the protective mechanism 5 is provided with a punch mechanism 6. The punch mechanism 6 includes a pressure plate 601, forming blocks 602, and guide rods 603. Multiple forming blocks 602 are fixedly installed at the bottom of the pressure plate 601 and are adapted to the forming cylinder 402. Multiple guide rods 603 are respectively fixedly installed at the bottom of the pressure plate 601 and located outside the forming blocks 602. The pressure plate 601 and the forming blocks 602 fixedly installed at the bottom cooperate with each other. During the pressing process, the pressure plate moves downward under the pressure of the external stamping equipment. The pressure plate 601 moves the forming block 602 into the forming cylinder 402, where it works together with the top block 403 to apply pressure to the powder, causing the powder to form a blank of a predetermined shape. The guide rod 603 can be inserted above the guard plate 504 to provide precise guidance for the up-and-down movement of the forming block 602 during the pressing process, ensuring the linearity and stability of the movement of the pressure plate 601, preventing the pressure plate 601 from deviating or tilting during the movement, thereby ensuring that the pressing force is applied evenly to the powder, and improving the quality consistency and precision of the pressed product.

[0045] In this invention, the working steps of the device are as follows:

[0046] 1. First, install the support base 101 and the pressure plate 601 on the upper end of the pressing equipment to ensure stability during operation;

[0047] 2. Next, start the water pump 204 to pump the liquid in the water tank 201 out into the flow channel 202, and then let it flow back into the water tank 201 through the drain pipe 203 on the other side.

[0048] 3. Then, the powder can be poured into the molding cylinder 402, the pressing equipment can be started, and the molding block 602 can be dropped into the molding cylinder 402 to press the powder into shape.

[0049] 4. Finally, activate the hydraulic rod 103 to push the top block 403 upward, causing the workpiece to be demolded upward. The worker can then remove the workpiece and retract the hydraulic rod 103 to begin the next stamping operation.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy die characterized by: Including support mechanism (1), heat dissipation mechanism (2), sealing mechanism (3) and concave die mechanism (4), wherein: The support mechanism (1) includes a support seat (101) and a fixed seat (105), the bottom of the fixed seat (105) is detachably connected with the top of the support seat (101) by bolts; The heat dissipation mechanism (2) includes a water tank (201), a flow-through groove (202) and a plurality of drainage pipes (203), the water tank (201) is fixedly installed on the outer wall of the fixed seat (105), the flow-through groove (202) is opened in the middle of the top of the fixed seat (105), one end of the plurality of drainage pipes (203) is respectively threadedly connected to the two sides of the outer wall of the fixed seat (105), and the inner wall of the drainage pipe (203) is in communication with the inner wall of the flow-through groove (202), the other end of the plurality of drainage pipes (203) is respectively threadedly connected to the two sides of the outer wall of the water tank (201); The sealing mechanism (3) is detachably connected to the inner bottom wall of the flow-through groove (202) to seal the flow-through groove (202); The concave die mechanism (4) is detachably connected to the inner bottom wall of the sealing mechanism (3) to store and form the powder.

2. A powder metallurgy die according to claim 1, characterized in that: The support mechanism (1) further includes positioning grooves (102), hydraulic rods (103) and fixing bolts (104), a plurality of positioning grooves (102) are respectively formed in the top of the support seat (101), a plurality of hydraulic rods (103) are respectively detachably connected to the inner bottom wall of the positioning groove (102), the fixing bolt (104) is threadedly penetrated on the outer wall of the hydraulic rod (103), and one end of the fixing bolt (104) penetrating out of the hydraulic rod (103) is threadedly connected with the inner bottom wall of the positioning groove (102).

3. A powder metallurgy die according to claim 1, wherein: The heat dissipation mechanism (2) further includes water pumps (204) and heat dissipation fins (205), a plurality of water pumps (204) are respectively fixedly installed on the outer wall of the plurality of drainage pipes (203) to drive the medium in the drainage pipe (203), and a plurality of heat dissipation fins (205) are all fixedly connected to the outer wall of the water tank (201).

4. A powder metallurgy die according to claim 1, wherein: The sealing mechanism (3) includes a sealing seat (301), a protective shell (302), a sealing cover (303) and a clamping block (304), the bottom of the sealing seat (301) is detachably connected with the inner bottom wall of the flow-through groove (202), the top of the sealing seat (301) is fixedly connected with the bottom of the protective shell (302), the sealing cover (303) is sleeved above the outer surface of the protective shell (302), and the clamping block (304) is fixedly connected to the outer wall of the protective shell (302) to limit the sealing cover (303).

5. A powder metallurgy die according to claim 4, wherein: The sealing mechanism (3) further comprises sealing pads (305) and fixing rods (306), three sealing pads (305) are fixedly installed on the inner ring and the outer ring of the sealing cover (303) and the bottom of the sealing seat (301) respectively, and a plurality of fixing rods (306) are respectively threaded through the top of the sealing cover (303), one end of the fixing rod (306) penetrating through the sealing cover (303) is inserted with the top of the sealing seat (301), and the other end of the fixing rod (306) penetrating out of the sealing seat (301) is screwed with the inner bottom wall of the flow channel (202).

6. A powder metallurgy die according to claim 1, wherein: The concave die mechanism (4) comprises a pad plate (401), a forming cylinder (402) and a top block (403), the bottom of the pad plate (401) is connected with the top of the sealing seat (301) through bolts, and the pad plate (401) is located inside the protective shell (302), the top block (403) is slidably connected with the inner wall of the forming cylinder (402), and the bottom of the top block (403) is detachably connected with the top of the hydraulic rod (103).

7. A powder metallurgy die according to claim 6, wherein: The top of the fixing seat (105) is detachably connected with a protection mechanism (5), the protection mechanism (5) comprises a cover plate (501), a fastening bolt (502), a guide hole (503) and a guard plate (504), the bottom of the cover plate (501) is detachably connected with the top of the fixing seat (105) through the fastening bolt (502), the guide hole (503) is formed in the top of the cover plate (501) and located above the forming cylinder (402), and the guard plate (504) is fixedly installed on the inner side wall of the guide hole (503).

8. A powder metallurgy die according to claim 7, wherein: The top of the protection mechanism (5) is provided with a convex die mechanism (6), the convex die mechanism (6) comprises a pressing plate (601), a forming block (602) and a guide rod (603), a plurality of forming blocks (602) are fixedly installed on the bottom of the pressing plate (601) and matched with the forming cylinder (402), and a plurality of guide rods (603) are respectively fixedly installed on the bottom of the pressing plate (601) and located outside the forming blocks (602).

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