A powder metallurgy pressing die

Abstract

This application relates to the technical field of molds, specifically to a powder metallurgy pressing mold, which includes a workbench. Above the workbench, a mold bottom plate is installed. On the upper end surface of the mold bottom plate, a first template and a second template are provided. An annular groove is formed inside the first template. A ring plate is fixedly installed on the side wall of the second template. The ring plate is inserted into the annular groove. The material of the ring plate is an elastic material. Above the workbench, a support frame is installed. An oil cylinder is installed on the inner wall of the support frame near the upper side. Metallurgical powder is introduced into the mold cavity between the first template and the second template through an external feeding pipe. Subsequently, the control oil cylinder drives the pressing head to move downward, so that the pressing head moves toward the mold cavity side, and the pressing head compresses the powder inside the mold cavity until the powder is compacted. After the powder is formed, the first template and the second template can be automatically controlled to move away from each other through the discharging mechanism, and the formed powder metallurgy can be automatically taken out, and the operation is relatively convenient.

Description

Technical Field

[0001] The present application relates to the technical field of molds, and specifically to a powder metallurgy pressing mold. Background Art

[0002] Powder metallurgy is a process technology for producing metal powders or using metal powders (or mixtures of metal powders and non-metal powders) as raw materials, and manufacturing metal materials, composite materials, and various types of products through forming and sintering. Among them, the purpose of forming is to obtain a green compact with a certain shape and size and make it have a certain density and strength.

[0003] In the prior art, a common die pressing device is used to press and form metallurgical powders. That is, after filling metallurgical powders in a die, the powders are compacted by applying pressure with a punch, and then the formed green compact is ejected. For example, the application with publication number CN115365767A discloses a powder metallurgy pressing mold processing technology and a powder metallurgy pressing mold. Step 1: Drill holes inside the overall blank mold; Step 2: Heat-treat the overall blank mold processed in Step 1. First, drill holes inside the die body, and then perform heat treatment. After internal drilling, the volume of the die body decreases, and the internal structure conversion is more uniform during heat treatment. After changing the process, only 2 - 3 times of tempering are required to eliminate the internal stress of the material and avoid the phenomenon of local cracking of the material during slow wire cutting.

[0004] Although the above technical solution can solve the problem of local cracking of the material, there are still other problems in specific operations. For example, after the product is formed, it is necessary for the staff to manually assist in taking out the formed product, which is rather troublesome and not conducive to the subsequent use of the product.

[0005] Therefore, it is necessary to provide a powder metallurgy pressing mold to solve the above problems.

[0006] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of the present application, and therefore, it may include information that does not constitute the prior art. Summary of the Invention

[0007] The technical solution adopted by the present application to solve its technical problems is: a powder metallurgy pressing mold, including a workbench, a mold bottom plate is installed above the workbench, a first template and a second template are arranged on the upper end surface of the mold bottom plate, an annular groove is formed inside the first template, an annular plate is fixedly installed on the side wall of the second template, the annular plate is inserted into the annular groove, a support frame is installed above the workbench, an oil cylinder is installed on the inner wall of the support frame near the upper side, the telescopic end of the oil cylinder corresponds to the cavity between the first template and the second template, and a pressing head is fixedly installed at the telescopic end of the oil cylinder; a discharging mechanism is arranged on one side of the workbench, and the discharging mechanism is used to control the first template and the second template to move away from each other.

[0008] Further, the shape of the annular plate is adapted to the shape of the annular groove, and the material of the annular plate is an elastic material; during operation, since the shapes of the annular plate and the annular groove are adapted to each other, it is convenient for the first template and the second template to be separated from each other and closed again, which is beneficial to the subsequent removal and forming of the product.

[0009] Further, the discharging mechanism includes a plurality of connecting brackets fixedly installed on the side wall of the support frame. A pulley is rotatably arranged in each of the plurality of connecting brackets. The plurality of pulleys are arranged vertically. An elastic pull rope is wound around the surface of each pulley. One end of the elastic pull rope is connected to the side wall of the telescopic end of the oil cylinder, and the other end is connected to a pull column. Two pull columns are provided and are respectively connected to the side walls of the first template and the second template; a limiting unit is arranged on the upper surface of the pull column, and the limiting unit is used for limiting and fixing the pull column.

[0010] Further, a limiting frame is fixedly installed on the side wall of the support frame. There are two limiting frames. The two pull columns are respectively slidably arranged inside the limiting frames. A sliding groove adapted to the pull column is opened inside the limiting frame; during operation, when the pull column moves, the pull column will move inside the limiting frame at the same time. Under the limitation of the limiting frame on the pull column, it can be ensured that the first template and the second template connected to the pull column move on the same axis, so as to facilitate the removal of the formed product.

[0011] Further, a limiting spring is fixedly installed on the inner wall of the limiting frame. The side of the limiting spring away from the limiting frame is connected to the side wall of the pull column; during operation, when the elastic pull rope pulls the pull column to move through the fixed pulley, the pull column will compress the limiting spring on its side wall at the same time. After the formed product is taken out, first control the oil cylinder to drive the pressing head to move down, that is, the telescopic end of the oil cylinder no longer stretches the elastic pull rope, so the elastic pull rope will loosen to a certain extent. When the loosening degree of the elastic pull rope is enough for the limiting spring to drive the pull column to move back from the compressed state, that is, the first template and the second template will be closed again under the action of the corresponding limiting springs respectively, which is convenient for the subsequent pressing of powder metallurgy.

[0012] Further, the limiting unit includes an elastic limiting head installed above the pull column. The shape of the elastic limiting head is arc-shaped. An annular seat is installed on the side wall of the limiting frame. A limiting groove is opened at a position corresponding to the elastic limiting head on the inner wall of the annular seat. The shape of the elastic limiting head is adapted to the shape of the limiting groove.

[0013] Further, a fillet is provided on the groove wall of the limit groove, and a spring is sleeved on the outer surface of the elastic limit head; a trigger unit is provided on the side wall of the pull column, and the trigger unit is used to control the removal of the molded product; during operation, since the spring is sleeved on the surface of the elastic limit head and the shape of the limit groove is adapted to the shape of the elastic limit head, it is convenient for the subsequent elastic pull rope to pull the pull column out of the limit groove.

[0014] Further, the trigger unit includes a contact point one fixedly installed on the side wall of the pull column, a contact point two installed on the inner wall of the limit frame, a fixed frame installed above the workbench, a driving gear rotatably arranged in the fixed frame, the end of the driving gear is connected to the output end of an external motor, a ratchet plate is slidably arranged in the fixed frame, the ratchet plate is meshed with the driving gear, and the side wall of the ratchet plate is connected to the lower end surface of the mold bottom plate through an L-shaped support plate.

[0015] Further, two top plates are fixedly installed above the workbench, an embedding groove is provided inside the mold bottom plate, the shape of the embedding groove is adapted to the shape of the top plate, and the top plate is slidably arranged inside the embedding groove; during operation, when the mold bottom plate moves downward and the template one and the template two also just move to the side close to the top plate, as the mold bottom plate moves downward while the position of the top plate remains unchanged, the top plate can push the molded product above the mold bottom plate upward by a certain distance, thus facilitating the removal of the molded product.

[0016] Further, a limit bracket adapted to the ratchet plate is provided inside the fixed frame; during operation, the limit bracket is provided to facilitate the movement of the driving gear driving the ratchet plate.

[0017] The beneficial effect of the present application is as follows: A powder metallurgy pressing mold provided by the present application, through the action of the fixed pulley, the elastic pull rope will pull the pull column at its other end, and the two pull columns will respectively pull the template one and the template two, and then the template one and the template two will be separated from each other, that is, the template two will drive the annular plate to be pulled out of the annular groove of the template one by a certain distance, so that the molded product between them will be above the mold bottom plate. Such a design can make the template one and the template two automatically separate, avoiding manual operation by the staff and also avoiding the problem that when the molded product is pushed out from the bottom, the adhesion between the molded product and the inner wall of the mold is relatively strong, resulting in damage to the outer peripheral surface of the molded product, and the operation is relatively convenient.

[0018] When the elastic drawstring pulls the pull post out from the limit of the limit slot, the pull post will drive the contact point one to move towards the side close to the contact point two at the same time. After the template one and the template two are separated from each other by a certain distance, the contact point one will contact the contact point two, so that the external circuit is connected. Therefore, the external controller will control the motor to drive the driving gear to rotate, and the driving gear will drive the ratchet plate engaged with it to move. The ratchet plate will drive the L-shaped support plate and the mold bottom plate to move downward at the same time, so that the mold bottom plate drives the formed product to move downward, and the formed product is moved out from between the template one and the template two, thus facilitating the subsequent removal of the formed product.

[0019] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The following will refer to the drawings to further explain the present application in detail. Brief Description of the Drawings

[0020] The specification drawings forming a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0021] Figure 1 is the three-dimensional schematic diagram in the present application;

[0022] Figure 2 is the partial structural schematic diagram of the annular groove and the annular plate in the present application;

[0023] Figure 3 is the partial structural schematic diagram of the pulley in the present application;

[0024] Figure 4 is the partial structural schematic diagram of the pull post in the present application;

[0025] Figure 5 is the partial structural schematic diagram of the limit frame in the present application;

[0026] Figure 6 is the partial structural schematic diagram of the cross-section of the limit frame in the present application;

[0027] Figure 7 is the partial structural schematic diagram of the contact point one and the contact point two in the present application;

[0028] Figure 8 is the partial structural schematic diagram of the L-shaped support plate in the present application;

[0029] Figure 9 is the partial structural schematic diagram of the top plate in the present application.

[0030] Among them, the reference numerals in the drawings:

[0031] 1. Workbench; 2. Mold bottom plate; 201. First template; 202. Second template; 3. Annular groove; 4. Annular plate; 5. Support frame; 501. Connecting support; 502. Pulley; 6. Oil cylinder; 7. Pressing head; 8. Elastic pull rope; 9. Pulling column; 10. Limit frame; 11. Limit spring; 12. Elastic limit head; 13. Annular seat; 14. Limit groove; 15. First contact; 16. Second contact; 17. Fixed frame; 171. Ratchet plate; 172. L-shaped support plate; 18. Driving gear; 19. Top plate; 20. Embedded groove. Detailed implementation manner

[0032] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The following will describe the present application in detail with reference to the drawings and in combination with the embodiments.

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] As Figures 1 to 6 shown, the present application provides a powder metallurgy pressing mold, including a workbench 1, a mold bottom plate 2 is installed above the workbench 1, a first template 201 and a second template 202 are arranged on the upper end surface of the mold bottom plate 2, an annular groove 3 is opened inside the first template 201, an annular plate 4 is fixedly installed on the side wall of the second template 202, the annular plate 4 is inserted into the annular groove 3, a support frame 5 is installed above the workbench 1, an oil cylinder 6 is installed on the inner wall of the support frame 5 near the upper side, the telescopic end of the oil cylinder 6 corresponds to the cavity between the first template 201 and the second template 202, and a pressing head 7 is fixedly installed at the telescopic end of the oil cylinder 6; a discharging mechanism is arranged on one side of the workbench 1, and the discharging mechanism is used to control the first template 201 and the second template 202 to move away from each other;

[0035] During operation, in the initial state, the first template 201 and the second template 202 are butted against each other, and the cavity formed by their combination forms a mold cavity; then, metallurgical powder is introduced into the mold cavity between the first template 201 and the second template 202 through an external material pipe, and then the oil cylinder 6 is controlled to drive the pressing head 7 to move downward, so that the pressing head 7 moves toward the side close to the mold cavity, so that the pressing head 7 compresses the powder inside the mold cavity until the powder is compacted. After the powder is formed, the discharging mechanism can automatically control the first template 201 and the second template 202 to move away from each other, and the formed powder metallurgy can be automatically taken out, and the operation is relatively convenient.

[0036] The shape of the annular plate 4 is adapted to the shape of the annular groove 3, and the material of the annular plate 4 is an elastic material; during operation, since the shapes of the annular plate 4 and the annular groove 3 are adapted to each other, it is convenient for the first template 201 and the second template 202 to be separated from each other and closed again, which is beneficial to the subsequent removal and forming of the product.

[0037] The discharging mechanism includes a plurality of connecting brackets 501 fixedly installed on the side wall of the support frame 5. A pulley 502 is rotatably arranged in each of the plurality of connecting brackets 501. The plurality of pulleys 502 are arranged vertically. An elastic pull rope 8 is wound around the surface of each pulley 502. One end of the elastic pull rope 8 is connected to the side wall of the telescopic end of the oil cylinder 6, and the other end is connected to a pull post 9. Two pull posts 9 are provided and are respectively connected to the side walls of the first template 201 and the second template 202; a limiting unit is arranged on the upper surface of the pull post 9, and the limiting unit is used for limiting and fixing the pull post 9.

[0038] During operation, refer to the attached Figure 3 As shown, at this time, the first template 201 and the second template 202 are closed together, and the pressing head 7 above is pressing and forming the powder in the cavity between the first template 201 and the second template 202; when the powder between the first template 201 and the second template 202 is formed, first control the telescopic end of the oil cylinder 6 to drive the pressing head 7 to move upward, so that the pressing head 7 gradually moves away from the first template 201 and the second template 202. After the telescopic end of the oil cylinder 6 moves a certain distance, the side wall of the telescopic end of the oil cylinder 6 will simultaneously pull the elastic pull rope 8. Subsequently, through the action of the pulley 502, the elastic pull rope 8 will pull the pull post 9 at its other end, and the two pull posts 9 will respectively pull the first template 201 and the second template 202. Subsequently, the first template 201 and the second template 202 will be separated from each other, that is, the second template 202 will drive the annular plate 4 to pull out a certain distance from the annular groove 3 of the first template 201, so that the formed product between them will be above the mold bottom plate 2. With such a design, the first template 201 and the second template 202 can be automatically separated, avoiding manual operation by workers and also avoiding the problem that the outer peripheral surface of the formed product is strongly adhered to the inner wall of the mold when the formed product is pushed out from the bottom, and the operation is relatively convenient.

[0039] It should be noted that refer to the attached Figure 3As shown, this is the initial state of the mold. The first template 201 and the second template 202 are closed together, and the staff can add powder metallurgy materials into the cavities of both. Moreover, at this time, the elastic pull rope 8 is in a loose state, and the looseness of the elastic pull rope 8 is sufficient for the telescopic end of the oil cylinder 6 to drive the pressing head 7 to move downward, and the pressing head 7 can complete the pressing operation. At the same time, when the telescopic end of the oil cylinder 6 moves downward, it will not pull the elastic pull rope. In this way, it is convenient for the oil cylinder 6 to pull the pressing head 7 upward by a certain distance later, and then the telescopic end of the oil cylinder 6 will pull the elastic pull rope 8, so as to pull the first template 201 and the second template 202 apart from each other.

[0040] A limiting frame 10 is fixedly installed on the side wall of the support frame 5. There are two limiting frames 10. The two pull columns 9 are respectively slidably arranged inside the limiting frame 10. A sliding groove adapted to the pull column 9 is opened inside the limiting frame 10. During work, when the pull column 9 moves, the pull column 9 will move inside the limiting frame 10 at the same time. Under the limitation of the limiting frame 10 on the pull column 9, it can ensure that the first template 201 and the second template 202 connected to the pull column 9 move on the same axis, so as to facilitate the removal of the formed product.

[0041] As Figures 3 to 7 As shown, a limiting spring 11 is fixedly installed on the inner wall of the limiting frame 10. The side of the limiting spring 11 away from the limiting frame 10 is connected to the side wall of the pull column 9. During work, when the elastic pull rope 8 pulls the pull column 9 to move through the pulley 502, the pull column 9 will compress the limiting spring 11 on its side wall at the same time. After the formed product is taken out, first control the oil cylinder 6 to drive the pressing head 7 to move downward, that is, the telescopic end of the oil cylinder 6 no longer stretches the elastic pull rope 8, so the elastic pull rope 8 will loosen to a certain extent. When the looseness of the elastic pull rope 8 is enough for the limiting spring 11 to drive the pull column 9 to move back from the compressed state, that is, the first template 201 and the second template 202 will close again under the action of the corresponding limiting springs 11 respectively, so as to facilitate the subsequent pressing of powder metallurgy.

[0042] As Figures 4 to 9As shown in the figure, the limiting unit includes an elastic limiting head 12 installed above the pulling column 9. The shape of the elastic limiting head 12 is arc-shaped. An annular seat 13 is installed on the side wall of the limiting frame 10. A limiting groove 14 is opened at a position corresponding to the inner wall of the annular seat 13 and the elastic limiting head 12. The shape of the elastic limiting head 12 is adapted to the shape of the limiting groove 14. During operation, when the first template 201 and the second template 202 are closed together, at this time, the elastic limiting head 12 is located inside the limiting groove 14 on the inner wall of the annular seat 13. At this time, the elastic limiting head 12 can give a certain limiting force to the annular seat 13 and the pulling column 9, avoiding the problem that when the upper pressing head 7 presses the molding material, the first template 201 and the second template 202 are separated due to the large force, so as to facilitate the formation of the product in the cavity between the first template 201 and the second template 202.

[0043] Moreover, after the first molding is completed, under the pulling of the elastic pulling rope 8 on the pulling column 9, when the pulling force is greater than the limiting force of the elastic limiting head 12 and the limiting groove 14, the elastic limiting head 12 will be pulled out from the limiting groove 14, so that the pulling column 9 will continue to drive the first template 201 and the second template 202 to separate from each other, thus facilitating the subsequent removal of the molded product.

[0044] The groove wall of the limiting groove 14 is provided with a fillet, and a spring is sleeved on the outer surface of the elastic limiting head 12. A triggering unit is arranged on the side wall of the pulling column 9, and the triggering unit is used to control the removal of the molded product. During operation, since a spring is sleeved on the surface of the elastic limiting head 12 and the shape of the limiting groove 14 is adapted to the shape of the elastic limiting head 12, it is convenient for the subsequent elastic pulling rope 8 to pull the pulling column 9 out of the limiting groove 14.

[0045] The triggering unit includes a first contact 15 fixedly installed on the side wall of the pulling column 9. A second contact 16 is installed on the inner wall of the limiting frame 10. Above the workbench 1, a fixing frame 17 is installed. A driving gear 18 is rotatably arranged inside the fixing frame 17. The end of the driving gear 18 is connected to the output end of an external motor. A ratchet plate 171 is slidably arranged inside the fixing frame 17. The ratchet plate 171 is meshed with the driving gear 18. The side wall of the ratchet plate 171 is connected to the lower end surface of the mold bottom plate 2 through an L-shaped support plate 172. During operation, when the elastic pulling rope 8 pulls the pulling column 9 out of the limit of the limit groove 14, the pulling column 9 will drive the first contact 15 to move towards the side close to the second contact 16 at the same time. When the first template 201 and the second template 202 are separated from each other by a certain distance, the first contact 15 will contact the second contact 16, so that the external circuit is connected. Therefore, the external controller will control the motor to drive the driving gear 18 to rotate. The driving gear 18 drives the ratchet plate 171 meshed with it to move. The ratchet plate 171 will drive the L-shaped support plate 172 and the mold bottom plate 2 to move downward at the same time, so that the mold bottom plate 2 drives the formed product to move downward, so that the formed product is removed from between the first template 201 and the second template 202, thus facilitating the subsequent removal of the formed product.

[0046] Above the workbench 1, two top plates 19 are fixedly installed. An embedding groove 20 is formed inside the mold bottom plate 2. The shape of the embedding groove 20 is adapted to the shape of the top plate 19. The top plate 19 is slidably arranged inside the embedding groove 20. During operation, when the mold bottom plate 2 moves downward and the first template 201 and the second template 202 also just move to the side close to the top plate 19, as the mold bottom plate 2 moves downward while the position of the top plate 19 remains unchanged, the top plate 19 can push the formed product above the mold bottom plate 2 upward for a certain distance, thus facilitating the removal of the formed product.

[0047] A limiting bracket adapted to the ratchet plate 171 is arranged inside the fixing frame 17. During operation, the arrangement of the limiting bracket can facilitate the movement of the driving gear 18 driving the ratchet plate 171.

[0048] Working principle: In the initial state, the first template 201 and the second template 202 are butted against each other, and the cavity formed by their combination forms a mold cavity. Subsequently, metallurgical powder is introduced into the mold cavity between the first template 201 and the second template 202 through an external feed pipe. Then, the control oil cylinder 6 drives the pressing head 7 to move downward, so that the pressing head 7 moves towards the side close to the mold cavity, and the pressing head 7 compresses the powder inside the mold cavity until the powder is compacted. After the powder is formed, the first template 201 and the second template 202 can be automatically controlled to move away from each other through the discharging mechanism, and the formed powder metallurgy can be automatically taken out, and the operation is relatively convenient.

[0049] Refer to the appendix Figure 3As shown, at this time, the first template 201 and the second template 202 are closed together, and the pressing head 7 above is pressing the powder in the cavity between the first template 201 and the second template 202 into shape; after the powder between the first template 201 and the second template 202 is shaped, first control the telescopic end of the oil cylinder 6 to drive the pressing head 7 to move upward, so that the pressing head 7 gradually moves away from the first template 201 and the second template 202. After the telescopic end of the oil cylinder 6 moves a certain distance, the side wall of the telescopic end of the oil cylinder 6 will simultaneously pull the elastic pull rope 8. Subsequently, through the action of the pulley 502, the elastic pull rope 8 will pull the pull post 9 at its other end, and the two pull posts 9 will respectively pull the first template 201 and the second template 202. Subsequently, the first template 201 and the second template 202 will separate from each other, that is, the second template 202 will drive the annular plate 4 to pull out a certain distance from the annular groove 3 of the first template 201, so that the formed product between them will be above the mold bottom plate 2. Such a design can make the first template 201 and the second template 202 separate automatically, avoiding manual operation by workers, and also avoiding the problem that when the formed product is pushed out from the bottom, the formed product has a strong adhesion to the inner wall of the mold, resulting in damage to the outer peripheral surface of the formed product. The operation is relatively convenient;

[0050] When the elastic pull rope 8 pulls the pull post 9 to move through the pulley 502, the pull post 9 will simultaneously compress the limit spring 11 on its side wall. After the formed product is taken out, first control the oil cylinder 6 to drive the pressing head 7 to move downward, that is, the telescopic end of the oil cylinder 6 no longer stretches the elastic pull rope 8, so the elastic pull rope 8 will loosen to a certain extent. When the looseness of the elastic pull rope 8 is enough for the limit spring 11 to drive the pull post 9 to move back from the compressed state, that is, the first template 201 and the second template 202 will close again under the action of the corresponding limit springs 11 respectively, thus facilitating the subsequent pressing of powder metallurgy;

[0051] When the first template 201 and the second template 202 are closed together, at this time, the elastic limit head 12 is located inside the limit groove 14 on the inner wall of the annular seat 13; at this time, the elastic limit head 12 can give a certain limit force to the annular seat 13 and the pull post 9, avoiding the problem that when the pressing head 7 above presses the forming material, the first template 201 and the second template 202 separate due to the large force, so as to facilitate the forming of the product in the cavity between the first template 201 and the second template 202; moreover, after one forming is completed, under the pulling of the elastic pull rope 8 on the pull post 9, when the pulling force is greater than the limit force of the elastic limit head 12 and the limit groove 14, the elastic limit head 12 will be pulled out from the limit groove 14, so that the pull post 9 will continue to drive the first template 201 and the second template 202 to separate from each other, thus facilitating the subsequent taking out of the formed product;

[0052] When the elastic drawstring 8 pulls the pull post 9 out of the limit of the limit groove 14, the pull post 9 will simultaneously drive the contact point one 15 to move towards the side close to the contact point two 16. After the template one 201 and the template two 202 are separated from each other by a certain distance, the contact point one 15 will contact the contact point two 16, so that the external circuit is connected. Therefore, the external controller will control the motor to drive the drive gear 18 to rotate, and the drive gear 18 drives the ratchet plate 171 engaged with it to move. The ratchet plate 171 will simultaneously drive the L-shaped support plate 172 and the mold bottom plate 2 to move downward, so that the mold bottom plate 2 drives the formed product to move downward, so that the formed product is removed from between the template one 201 and the template two 202, thus facilitating the subsequent removal of the formed product; when the mold bottom plate 2 moves downward, and the template one 201 and the template two 202 also just move to the side close to the top plate 19. As the mold bottom plate 2 moves downward and the position of the top plate 19 remains unchanged, the top plate 19 can push the formed product above the mold bottom plate 2 upward by a certain distance, thus facilitating the removal of the formed product.

[0053] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A powder metallurgy pressing die, characterized in that: It includes a workbench (1), above which a die bottom plate (2) is installed. On the upper end surface of the die bottom plate (2), a first template (201) and a second template (202) are provided. An annular groove (3) is formed inside the first template (201). A ring plate (4) is fixedly installed on the side wall of the second template (202), and the ring plate (4) is inserted into the annular groove (3). Above the workbench (1), a support frame (5) is installed. Inside the upper side of the inner wall of the support frame (5), an oil cylinder (6) is installed. The telescopic end of the oil cylinder (6) corresponds to the cavity between the first template (201) and the second template (202). A pressing head (7) is fixedly installed at the telescopic end of the oil cylinder (6); on one side of the workbench (1), a discharging mechanism is provided, and the discharging mechanism is used to control the first template (201) and the second template (202) to move away from each other; The discharging mechanism includes a plurality of connecting brackets (501) fixedly installed on the side wall of the support frame (5). Inside each of the plurality of connecting brackets (501), a pulley (502) is rotatably arranged. The plurality of pulleys (502) are arranged vertically. An elastic pull rope (8) is wound around the surface of each pulley (502). One end of the elastic pull rope (8) is connected to the side wall of the telescopic end of the oil cylinder (6), and the other end is connected to a pull post (9). Two pull posts (9) are provided and are respectively connected to the side walls of the first template (201) and the second template (202); a limiting unit is arranged on the upper surface of the pull post (9), and the limiting unit is used to limit and fix the pull post (9); A limiting frame (10) is fixedly installed on the side wall of the support frame (5). There are two limiting frames (10). The two pull posts (9) are respectively slidably arranged inside the limiting frames (10). Inside the limiting frames (10), a sliding groove adapted to the pull post (9) is formed; A limiting spring (11) is fixedly installed on the inner wall of the limiting frame (10). The side of the limiting spring (11) away from the limiting frame (10) is connected to the side wall of the pull post (9); the limiting unit includes an elastic limiting head (12) installed above the pull post (9). The shape of the elastic limiting head (12) is arc-shaped. An annular seat (13) is installed on the side wall of the limiting frame (10). A limiting groove (14) is formed at the corresponding position of the inner wall of the annular seat (13) and the elastic limiting head (12). The shape of the elastic limiting head (12) is adapted to the shape of the limiting groove (14); The groove wall of the limiting groove (14) is provided with a fillet, and a spring is sleeved on the outer surface of the elastic limiting head (12); a trigger unit is arranged on the side wall of the pulling column (9), and the trigger unit is used for controlling the taking out of the formed product; the trigger unit includes a first contact (15) fixedly installed on the side wall of the pulling column (9), a second contact (16) is installed on the inner wall of the limiting frame (10), a fixing frame (17) is installed above the workbench (1), a driving gear (18) is rotatably arranged in the fixing frame (17), the end of the driving gear (18) is connected with the output end of an external motor, a ratchet plate (171) is slidably arranged in the fixing frame (17), the ratchet plate (171) is meshed with the driving gear (18), and the side wall of the ratchet plate (171) is connected with the lower end surface of the mold bottom plate (2) through an L-shaped support plate (172).

2. The powder metallurgy pressing die according to claim 1, wherein: The shape of the annular plate (4) is adapted to the shape of the annular groove (3), and the annular plate (4) is made of an elastic material.

3. The powder metallurgy pressing die according to claim 1, wherein: Two top plates (19) are fixedly installed above the workbench (1), an embedding groove (20) is formed in the mold bottom plate (2), the shape of the embedding groove (20) is adapted to the shape of the top plate (19), and the top plate (19) is slidably arranged inside the embedding groove (20).

4. A powder metallurgy pressing die according to claim 1, characterized in that: A limiting bracket adapted to the ratchet plate (171) is arranged inside the fixing frame (17).

Images