A cold pressing forming method and die for rubber washers

Abstract

The present invention relates to the technical field of powder cold pressing forming equipment, and specifically relates to a cold pressing forming method and die for rubber gaskets, including a lower template and an upper template. A plurality of annular grooves are formed in the upper end of the lower template. An annular plate is slidably connected in the annular groove. The lower end of the annular plate is connected to an extrusion mechanism. The extrusion mechanism is arranged in the lower template, and one end of the extrusion mechanism extends out from the upper end of the lower template. When the upper template moves downward and contacts the extending end of the extrusion mechanism, the extrusion mechanism drives the annular plate to move upward along the annular groove. Under the extrusion of the downward moving upper template and the upward moving annular plate, the metal powder is cold pressed into a metal gasket ring, and the rubber liquid enters between the metal gasket ring and the upper template. After forming, the metal gasket ring and the rubber ring are ejected by a jacking mechanism, realizing the production of the metal gasket ring and the rubber ring in one device and improving the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of powder cold pressing forming equipment, and particularly to a cold pressing forming method and die for rubber gaskets. Background Art

[0002] As disclosed in the Chinese patent with the publication number CN204975324U, a cold pressing forming die is provided. The die is provided with a pressing plate, a punch I, a die, a rubber gasket and a punch II. A cylindrical groove is provided at the center of the lower surface of the pressing plate. The cylindrical groove is in clearance fit with the top end of the punch I. The punch I is a cylindrical punch. The outer part of the die is in a cylindrical shape, and a cylindrical cavity is provided at its center. The bottom end of the punch I is in clearance fit with the upper part of the die. The top end of the punch II is in clearance fit with the lower part of the die. The rubber gasket is installed on the punch II in clearance fit and is in complete contact with the lower surface of the die. The punch I and the punch II and the die form a cavity for setting workpieces.

[0003] However, the above solution has the following deficiencies: In the above patent, the forming powder is put into the die and tamped, the punch I is assembled into the die cavity and the powder is compacted, the die is placed on the working table of the press, and the press head is pressed into the shallow groove on the upper surface of the pressing plate for pressure forming. However, for the production of combined rubber gaskets, since the combined rubber gasket is composed of two parts, a metal ring and a rubber gasket, and most of the existing production methods are to separately produce the metal ring and the rubber gasket and then combine the two to form the combined rubber gasket, it is impossible to produce a composite rubber gasket in one device. Therefore, we introduce a cold pressing forming method and die for rubber gaskets. Summary of the Invention

[0004] The purpose of the present invention is to provide a cold pressing forming method and die for rubber gaskets to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A cold pressing forming die for rubber gaskets includes a lower template and an upper template. A plurality of annular grooves are opened inside the upper end of the lower template. An annular plate is slidably connected in the annular grooves. The lower end of the annular plate is connected to an extrusion mechanism. The extrusion mechanism is arranged inside the lower template. One end of the extrusion mechanism extends out from the upper end of the lower template. When the upper template moves downward, it contacts the extended end of the extrusion mechanism, so that the extrusion mechanism drives the annular plate to move upward along the annular grooves. A plurality of jacking mechanisms are arranged inside the upper end of the annular plate, and the processed metal gasket ring is jacked out of the annular grooves through the jacking mechanisms;

[0007] A number of guiding cavities are opened inside the upper end of the upper template. A number of pushing mechanisms are slidably connected inside the guiding cavities. The pushing mechanisms are in contact with the plugging mechanism. The plugging mechanism is slidably connected inside the cavity. The upper end of the cavity is communicated with the guiding cavity, and the lower end is communicated with the external environment. By the liquid entering into the guiding cavity, the pushing mechanisms are pushed to move. By the movement of the pushing mechanisms, the plugging structure is driven to move upward, so that the lower end of the cavity is communicated with the external environment. A communicating cavity is opened inside the upper end of the cavity. The upper end of the communicating cavity is communicated with the guiding cavity. A number of powder connecting pipes are fixedly connected inside one side of the lower template. One end of the powder connecting pipe is communicated with the annular groove.

[0008] Preferably, the extrusion mechanism includes a push plate. The push plate is slidably connected inside the connecting cavity. The connecting cavity is opened inside the lower template. Two connecting rods are fixedly connected to the upper end of the push plate. The ends of the connecting rods away from the push plate extend into the annular groove and are fixedly connected to the annular plate. The lower end of the connecting cavity is communicated with the liquid guiding cavity. The liquid guiding cavity is opened inside the lower template. The end of the liquid guiding cavity away from the connecting cavity is communicated with the liquid storage cavity. The liquid storage cavity is opened inside the lower template. A T-shaped pressing rod is slidably connected inside the liquid storage cavity. The upper end of the T-shaped pressing rod extends into the external environment. Hydraulic oil is provided inside the liquid storage cavity.

[0009] Preferably, the jacking mechanism includes an arc-shaped plate. The arc-shaped plate is arranged inside the upper end of the annular plate. A T-shaped rod is movably connected inside the annular plate. The lower end of the T-shaped rod passes through the lower template and extends into the external environment. A connecting plate is provided on the lower side of the lower template. The outer sides of a number of the T-shaped rods are slidably connected inside the connecting plate. A number of electromagnets are provided inside the connecting plate. The electromagnets correspond to the positions of the T-shaped rods. A telescopic cylinder is fixedly connected inside the lower end of the lower template. The output end of the telescopic cylinder is fixedly connected to the connecting plate.

[0010] Preferably, the pushing mechanism includes a pushing block. A limiting cavity is opened inside one end of the pushing block. An I-shaped push rod is slidably connected inside the limiting cavity. The end of the I-shaped push rod away from the limiting cavity extends into the guiding cavity. A limiting spring is fixedly connected inside the limiting cavity. The other end of the limiting spring is fixedly connected to the I-shaped push rod. The lower end of the I-shaped push rod is fixedly connected to a special-shaped locking rod. The special-shaped locking rod is movably connected inside the pushing block. The locking end of the special-shaped locking rod extends into the external environment. The end of the pushing block away from the I-shaped push rod is arranged in an inclined shape.

[0011] Preferably, the plugging mechanism includes an extrusion block. The extrusion block is slidably connected inside the guiding cavity. The lower end of the extrusion block is arranged in an inclined shape. The lower end of the extrusion block is in contact with the inclined end of the pushing block. A clamping hole is opened inside the end of the extrusion block away from the pushing block. The locking end of the special-shaped locking rod is clamped inside the clamping hole.

[0012] Preferably, one end of the extrusion block is fixedly connected to a vertical rod. The lower end of the vertical rod extends into the cavity and is fixedly connected to a square plug rod. The square plug rod is slidably connected to the cavity. A first spring is sleeved outside the square plug rod. One end of the first spring is fixedly connected to the cavity, and the other end is fixedly connected to the square plug rod.

[0013] In addition, to achieve the above object, the present invention also provides a cold pressing forming method for rubber gaskets, which is used for the rubber gasket cold pressing mold described above, and includes:

[0014] S1. Metal powder is introduced into the annular groove through a powder connecting pipe. The upper template is controlled to move downward. When the lower end of the upper template contacts the T-shaped pressing rod, the hydraulic oil in the liquid storage cavity enters the liquid guiding cavity, and the push plate moves upward to drive the annular plate to move. Under the extrusion of the downward moving upper template and the upward moving annular plate, the metal powder is cold pressed into a metal gasket ring;

[0015] S2. The upper template is moved upward by a certain distance so that the protruding part at the lower end of the upper template is flush with the upper end of the cold-pressed metal gasket ring. Rubber liquid is conveyed into the guiding cavity. The rubber liquid entering the guiding cavity will push the I-shaped push rod into the limiting cavity, and at the same time, the clamping end of the special-shaped locking rod is disengaged from the clamping hole. When the I-shaped push rod contacts the pushing block, the pushing block will be pushed by the rubber liquid to move;

[0016] S3. When the pushing block moves, the extrusion block is extruded to move upward. At this time, the vertical rod moves to drive the square plug rod to move, and the cavity is communicated with the external environment. The rubber liquid will enter the cavity through the communication cavity, and finally enter between the metal gasket ring and the upper template. The electromagnet is turned on, so that the connecting plate drives the T-shaped rod to move when moving, and the telescopic cylinder is turned on to drive the connecting plate to move upward. Several arc-shaped plates push the processed metal gasket ring and rubber ring out of the annular groove, and the processed metal gasket ring and rubber ring are taken away.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: When the upper template moves downward and contacts the extending end of the extrusion mechanism, the extrusion mechanism drives the annular plate to move upward along the annular groove. Under the extrusion of the downward moving upper template and the upward moving annular plate, the metal powder is cold pressed into a metal gasket ring. By conveying the rubber liquid into the guiding cavity, the pushing mechanism contacts the blocking mechanism along the guiding cavity. At this time, the blocking mechanism cancels the blocking of the cavity, and the rubber liquid enters between the metal gasket ring and the upper template. After forming, the metal gasket ring and the rubber ring are ejected by the jacking mechanism, realizing the production of a metal gasket ring and a rubber ring in one device and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 Schematic enlarged view of structure at position A in the present invention;

[0020] Figure 3 Schematic cross-sectional view of the connection relationship between the pushing block and the extrusion block in the present invention;

[0021] Figure 4 Schematic top view of the lower template in the present invention;

[0022] Figure 5 Schematic three-dimensional cross-sectional view of the connection relationship between the extrusion block and the pushing block in the present invention;

[0023] Figure 6 Schematic three-dimensional structure view of the connection relationship between the square plug rod and the extrusion block in the present invention;

[0024] Figure 7 Schematic three-dimensional structure view of the connection relationship between the annular plate and the arc-shaped plate in the present invention;

[0025] Figure 8 Schematic three-dimensional structure view of the connection relationship between the T-shaped rod and the annular plate in the present invention;

[0026] Figure 9 Schematic three-dimensional cross-sectional view of the connection relationship between the metal gasket ring and the rubber ring in the present invention;

[0027] Figure 10 Schematic three-dimensional structure view of the connection relationship between the metal gasket ring and the rubber ring in the present invention.

[0028] In the figure: 1. Lower template; 2. Upper template; 3. Push plate; 4. Connection cavity; 5. Telescopic cylinder; 6. Connection plate; 7. Electromagnet; 8. T-shaped rod; 9. Liquid guide cavity; 10. Annular groove; 11. Annular plate; 12. T-shaped pressure rod; 13. Liquid storage cavity; 14. Square plug rod; 15. Communication cavity; 16. Cavity; 17. Extrusion block; 18. Pushing block; 19. Guide cavity; 20. Powder connection pipe; 21. Arc-shaped plate; 22. I-shaped push rod; 23. Metal gasket ring; 24. Limiting cavity; 25. Limiting spring; 26. Special-shaped locking rod; 27. Vertical rod; 28. Clamping hole; 29. Rubber ring; 30. First spring; 31. Connecting rod. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer toFigures 1-10 , the present invention provides a technical solution:

[0031] Embodiment 1:

[0032] A rubber gasket cold-pressing forming die comprises a lower die plate 1 and an upper die plate 2. The lower end of the upper die plate 2 is provided with a plurality of protrusions for forming. The upper end of the lower die plate 1 is provided with a plurality of annular grooves 10 for placing metal powder. An annular plate 11 is slidably connected in the annular groove 10. The lower end of the annular plate 11 is connected to an extrusion mechanism. The extrusion mechanism is arranged in the lower die plate 1. One end of the extrusion mechanism extends from the upper end of the lower die plate 1. When the upper die plate 2 moves downward, it contacts with the protruding end of the extrusion mechanism, so that the extrusion mechanism drives the annular plate 11 to move upward along the annular groove 10. At this time, when the upper die plate 2 moves downward, the annular plate 11 moves upward along the annular groove 10. Under the extrusion of the upper mold plate 2 and the upwardly moving annular plate 11, the metal powder is cold pressed into a metal gasket 23. A plurality of lifting mechanisms are provided in the upper end of the annular plate 11. The metal gasket 23 after processing is pushed out of the annular groove 10 by the lifting mechanisms. The processed metal gasket 23 and the rubber ring 29 are taken away, and the arc plate 21 is controlled to return to the original position. At the same time, metal powder is re-injected into the annular groove 10 to perform another processing. In order to ensure the strength of the metal gasket 23, the metal gasket 23 can also be heat-treated after cold pressing to improve the strength of the metal gasket 23 when in use.

[0033] A plurality of guide cavities 19 are provided in the upper end of the upper template 2, and a plurality of push mechanisms are slidably connected in the guide cavity 19. By delivering the rubber liquid into the guide cavity 19, as the rubber liquid continues to enter, the push mechanism will start to move along the guide cavity 19, and the push mechanism will contact the blocking mechanism. The blocking mechanism is slidably connected in the cavity 16. The upper end of the cavity 16 is connected to the guide cavity 19, and the lower end is connected to the external environment. The liquid enters the guide cavity 19, pushing the push mechanism to move, and the blocking structure is driven to move upward by the movement of the push mechanism, so that The lower end of the cavity 16 is connected to the external environment, and a connecting cavity 15 is opened in the upper end of the cavity 16. The upper end of the connecting cavity 15 is connected to the guide cavity 19. When the pushing mechanism no longer blocks the connecting cavity 15, the rubber liquid entering the guide cavity 19 will enter the cavity 16 through the connecting cavity 15, and then enter the annular groove 10 from the cavity 16. A plurality of powder connecting tubes 20 are fixedly connected to one side of the lower template 1. One end of the powder connecting tube 20 is connected to the annular groove 10, and the metal powder is introduced into the annular groove 10 through the powder connecting tube 20.

[0034] Embodiment 2:

[0035] On the basis of Embodiment 1, in order to prevent the square plug rod 14 from moving upward when the lower end of the upper template 2 cold-presses the metal powder, the extrusion mechanism includes a push plate 3. The push plate 3 is slidably connected to the connection cavity 4, and the connection cavity 4 is opened in the lower template 1. Two connecting rods 31 are fixedly connected to the upper end of the push plate 3. One end of the connecting rod 31 away from the push plate 3 extends into the annular groove 10 and is fixedly connected to the annular plate 11. The lower end of the connection cavity 4 communicates with the liquid guide cavity 9, and the liquid guide cavity 9 is opened in the lower template 1. One end of the liquid guide cavity 9 away from the connection cavity 4 communicates with the liquid storage cavity 13, and the liquid storage cavity 13 is opened in the lower template 1. A T-shaped pressing rod 12 is slidably connected in the liquid storage cavity 13, and the upper end of the T-shaped pressing rod 12 extends into the external environment. There is hydraulic oil in the liquid storage cavity 13. When the lower end of the upper template 2 contacts the T-shaped pressing rod 12, as the upper template 2 continuously moves downward, the T-shaped pressing rod 12 will be squeezed and move along the liquid storage cavity 13. At this time, the hydraulic oil in the liquid storage cavity 13 will enter the liquid guide cavity 9, and the hydraulic oil entering the liquid guide cavity 9 will eventually enter the connection cavity 4. As the upper template 2 continuously moves downward, the push plate 3 moves and drives the annular plate 11 to move synchronously. At this time, under the extrusion of the downward-moving upper template 2 and the upward-moving annular plate 11, the metal powder is cold-pressed into a metal gasket ring 23;

[0036] The jacking mechanism includes an arc plate 21. The arc plate 21 is arranged inside the upper end of the annular plate 11. A T-shaped rod 8 is movably connected inside the annular plate 11. The lower end of the T-shaped rod 8 passes through the lower template 1 and extends into the external environment. A connecting plate 6 is arranged on the lower side of the lower template 1. The outer sides of several T-shaped rods 8 are slidably connected inside the connecting plate 6. Several electromagnets 7 are arranged inside the connecting plate 6. The electromagnets 7 can select appropriate sizes and models during use. The electromagnets 7 correspond to the positions of the T-shaped rods 8. A telescopic cylinder 5 is fixedly connected to the inner lower end of the lower template 1. The output end of the telescopic cylinder 5 is fixedly connected to the connecting plate 6. Turn on the electromagnets 7 so that the connecting plate 6 can drive the T-shaped rods 8 to move when moving. Turn on the telescopic cylinder 5 to drive the connecting plate 6 connected to its output end to move upward. When the connecting plate 6 moves, it drives several T-shaped rods 8 to move. At this time, several arc plates 21 push the processed metal gasket ring 23 and the rubber ring 29 out of the annular groove 10 upward;

[0037] The driving mechanism includes a driving block 18. A limiting cavity 24 is formed at one end of the driving block 18. An I-shaped push rod 22 is slidably connected in the limiting cavity 24. One end of the I-shaped push rod 22 away from the limiting cavity 24 extends into the guiding cavity 19. A limiting spring 25 is fixedly connected in the limiting cavity 24, and the other end of the limiting spring 25 is fixedly connected to the I-shaped push rod 22. A special-shaped locking rod 26 is fixedly connected to the lower end of the I-shaped push rod 22. The special-shaped locking rod 26 is movably connected in the driving block 18, and the clamping end of the special-shaped locking rod 26 extends into the external environment. The end of the driving block 18 away from the I-shaped push rod 22 is inclined. The rubber liquid entering the guiding cavity 19 will first contact the I-shaped push rod 22. As the rubber liquid continuously enters, the I-shaped push rod 22 will be pushed to move into the limiting cavity 24. At this time, the limiting spring 25 is compressed. When the I-shaped push rod 22 moves, it will drive the clamping end of the special-shaped locking rod 26 to disengage from the clamping hole 28. When the I-shaped push rod 22 contacts the driving block 18, at this time, the driving block 18 will be pushed by the rubber liquid and start to move;

[0038] The blocking mechanism includes an extrusion block 17. The extrusion block 17 is slidably connected in the guiding cavity 19. The lower end of the extrusion block 17 is inclined. The lower end of the extrusion block 17 contacts the inclined end of the driving block 18. A clamping hole 28 is formed in the end of the extrusion block 17 away from the driving block 18. The clamping end of the special-shaped locking rod 26 is clamped in the clamping hole 28. A vertical rod 27 is fixedly connected to one end of the extrusion block 17. The lower end of the vertical rod 27 extends into the cavity 16 and is fixedly connected to the square blocking rod 14. The square blocking rod 14 is slidably connected in the cavity 16. A first spring 30 is sleeved outside the square blocking rod 14. One end of the first spring 30 is fixedly connected to the cavity 16, and the other end is fixedly connected to the square blocking rod 14. Since one end of the driving block 18 is inclined, during the movement of the driving block 18, the extrusion block 17 will be extruded to move upward. The upward movement of the extrusion block 17 drives the vertical rod 27 to move. When the vertical rod 27 moves, it drives the square blocking rod 14 to move. At this time, the cavity 16 is connected to the external environment. When the driving block 18 no longer blocks the communication cavity 15, at this time, the rubber liquid will enter the cavity 16 through the communication cavity 15 and finally enter between the metal gasket 23 and the upper template 2.

[0039] In addition, to achieve the above object, the present invention also provides a cold pressing forming method for a rubber gasket, which is used for the above-mentioned rubber gasket cold pressing die, including:

[0040] S1. Introduce metal powder into the annular groove 10 through the powder connecting pipe 20. Control the upper template 2 to move downward. When the lower end of the upper template 2 contacts the T-shaped pressing rod 12, the hydraulic oil in the liquid storage cavity 13 enters the liquid guiding cavity 9. The push plate 3 moves upward to drive the annular plate 11 to move. Under the extrusion of the downward moving upper template 2 and the upward moving annular plate 11, the metal powder is cold pressed into a metal gasket 23;

[0041] S2. Move the upper template 2 upward by a certain distance so that the protruding part at the lower end of the upper template 2 is flush with the upper end of the cold-pressed metal gasket 23. Then, transport the rubber liquid into the guiding cavity 19. The rubber liquid entering the guiding cavity 19 will push the I-shaped push rod 22 to move into the limiting cavity 24. At the same time, the clamping end of the special-shaped locking rod 26 will be disengaged from the clamping hole 28. When the I-shaped push rod 22 contacts the pushing block 18, the pushing block 18 will be pushed by the rubber liquid to move;

[0042] S3. When the pushing block 18 moves, the extrusion block 17 is extruded to move upward. At this time, the vertical rod 27 moves to drive the square blocking rod 14 to move, and the cavity 16 is communicated with the external environment. The rubber liquid will enter the cavity 16 through the communicating cavity 15 and finally enter between the metal gasket 23 and the upper template 2. Turn on the electromagnet 7 so that the connecting plate 6 drives the T-shaped rod 8 to move when moving. Turn on the telescopic cylinder 5 to drive the connecting plate 6 to move upward. Several arc-shaped plates 21 push the processed metal gasket 23 and the rubber ring 29 upward out of the annular groove 10, and take away the processed metal gasket 23 and the rubber ring 29.

[0043] Working principle: When in use, install the lower template 1 and the upper template 2 on the equipment. Import the metal powder into the annular groove 10 through the powder connecting pipe 20. Control the upper template 2 to move downward. The protrusion at the lower end of the upper template 2 will enter the annular groove 10. When the lower end of the upper template 2 contacts the T-shaped pressing rod 12, at this time, as the upper template 2 continues to move downward, the T-shaped pressing rod 12 will be extruded to move along the liquid storage cavity 13. At this time, the hydraulic oil in the liquid storage cavity 13 will enter the liquid guiding cavity 9, and the hydraulic oil entering the liquid guiding cavity 9 will finally enter the connecting cavity 4. As the upper template 2 continues to move downward, the push plate 3 moves and drives the annular plate 11 to move synchronously. At this time, under the extrusion of the downward-moving upper template 2 and the upward-moving annular plate 11, the metal powder is cold-pressed into a metal gasket 23;

[0044] After cold pressing, the upper template 2 will move upward by a certain distance so that the protruding part at the lower end of the upper template 2 is flush with the upper end of the cold-pressed metal gasket 23. When the upper template 2 moves upward, under the gravity of the annular plate 11 and the push plate 3, the hydraulic oil entering the connecting cavity 4 will be pushed back into the liquid storage cavity 13 for storage. By transporting the rubber liquid into the guiding cavity 19, the rubber liquid entering the guiding cavity 19 will first contact the I-shaped push rod 22. As the rubber liquid continues to enter, the I-shaped push rod 22 will be pushed to move into the limiting cavity 24. At this time, the limiting spring 25 is compressed. When the I-shaped push rod 22 moves, it will drive the clamping end of the special-shaped locking rod 26 to disengage from the clamping hole 28. When the I-shaped push rod 22 contacts the pushing block 18, at this time, the pushing block 18 will be pushed by the rubber liquid to start moving;

[0045] Since one end of the pushing block 18 is inclined, during the movement of the pushing block 18, the extrusion block 17 will be extruded to move upward. The upward movement of the extrusion block 17 drives the vertical rod 27 to move. When the vertical rod 27 moves, it drives the square blocking rod 14 to move. At this time, the cavity 16 is connected to the external environment. When the pushing block 18 no longer blocks the communication cavity 15, the rubber liquid will enter the cavity 16 through the communication cavity 15, and finally enter between the metal gasket 23 and the upper template 2. When the cavity 16 between the upper template 2 and the metal gasket 23 is filled with the rubber liquid, the supply of the rubber liquid to the guiding cavity 19 is cancelled. Under the elastic force of the first spring 30, the square blocking rod 14 will move downward to its original position. At the same time, the pushing block 18 will also return to its original position and block the communication cavity 15 again. Under the elastic force of the limiting spring 25, the I-shaped push rod 22 returns to its original position. At the same time, the clamping end of the special-shaped locking rod 26 will also be re-clamped into the clamping hole 28;

[0046] Turn on the electromagnet 7 so that the connecting plate 6 can drive the T-shaped rod 8 to move when it moves. Turn on the telescopic cylinder 5 to drive the connecting plate 6 connected to its output end to move upward. When the connecting plate 6 moves, it drives a plurality of T-shaped rods 8 to move. At this time, a plurality of arc-shaped plates 21 push the processed metal gasket 23 and the rubber ring 29 upward out of the annular groove 10, take away the processed metal gasket 23 and the rubber ring 29, control the arc-shaped plates 21 to return to their original positions, and at the same time inject metal powder into the annular groove 10 again to perform another processing.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold pressing die for rubber washers, comprising a lower template and an upper template, characterized in that: A number of annular grooves are formed in the upper end of the lower template. An annular plate is slidably connected in the annular groove. The lower end of the annular plate is connected to an extrusion mechanism. The extrusion mechanism is arranged in the lower template. One end of the extrusion mechanism extends out from the upper end of the lower template. When the upper template moves downward, it contacts the extended end of the extrusion mechanism, so that the extrusion mechanism drives the annular plate to move upward along the annular groove. A number of jacking mechanisms are arranged in the upper end of the annular plate. The processed metal gasket is jacked out of the annular groove through the jacking mechanism. A number of guiding cavities are formed in the upper end of the upper template. A number of pushing mechanisms are slidably connected in the guiding cavities. The pushing mechanisms are in contact with a plugging mechanism. The plugging mechanism is slidably connected in a cavity. The upper end of the cavity is communicated with the guiding cavity, and the lower end is communicated with the external environment. When liquid enters the guiding cavity, it pushes the pushing mechanisms to move. The movement of the pushing mechanisms drives the plugging structure to move upward, so that the lower end of the cavity is communicated with the external environment. A communicating cavity is formed in the upper end of the cavity. The upper end of the communicating cavity is communicated with the guiding cavity. A number of powder connecting pipes are fixedly connected inside one side of the lower template. One end of the powder connecting pipe is communicated with the annular groove.

2. The cold pressing die for a rubber washer according to claim 1, characterized in that: The extrusion mechanism includes a push plate. The push plate is slidably connected in a connecting cavity. The connecting cavity is formed in the lower template. Two connecting rods are fixedly connected to the upper end of the push plate. The ends of the connecting rods away from the push plate extend into the annular groove and are fixedly connected to the annular plate. The lower end of the connecting cavity is communicated with a liquid guiding cavity. The liquid guiding cavity is formed in the lower template. The end of the liquid guiding cavity away from the connecting cavity is communicated with a liquid storage cavity. The liquid storage cavity is formed in the lower template. A T-shaped pressing rod is slidably connected in the liquid storage cavity. The upper end of the T-shaped pressing rod extends into the external environment. Hydraulic oil is arranged in the liquid storage cavity.

3. A cold pressing die for rubber gaskets according to claim 1, characterized in that: The jacking mechanism includes an arc-shaped plate. The arc-shaped plate is arranged in the upper end of the annular plate. A T-shaped rod is movably connected in the annular plate. The lower end of the T-shaped rod passes through the lower template and extends into the external environment. A connecting plate is arranged on the lower side of the lower template. A number of the outer sides of the T-shaped rods are slidably connected in the connecting plate. A number of electromagnets are arranged in the connecting plate. The electromagnets correspond to the positions of the T-shaped rods. A telescopic cylinder is fixedly connected inside the lower end of the lower template. The output end of the telescopic cylinder is fixedly connected to the connecting plate.

4. A cold pressing die for rubber gaskets according to claim 1, characterized in that: The pushing mechanism includes a pushing block. A limiting cavity is formed in one end of the pushing block. An I-shaped push rod is slidably connected in the limiting cavity. The end of the I-shaped push rod away from the limiting cavity extends into the guiding cavity. A limiting spring is fixedly connected in the limiting cavity. The other end of the limiting spring is fixedly connected to the I-shaped push rod. The lower end of the I-shaped push rod is fixedly connected to a special-shaped locking rod. The special-shaped locking rod is movably connected in the pushing block. The locking end of the special-shaped locking rod extends into the external environment. The end of the pushing block away from the I-shaped push rod is arranged in an inclined shape.

5. The cold pressing die for a rubber washer according to claim 4, wherein: The plugging mechanism includes an extrusion block. The extrusion block is slidably connected in the guiding cavity. The lower end of the extrusion block is arranged in an inclined shape. The lower end of the extrusion block is in contact with the inclined end of the pushing block. A clamping hole is formed in the end of the extrusion block away from the pushing block. The locking end of the special-shaped locking rod is clamped in the clamping hole.

6. The cold pressing die for a rubber washer according to claim 5, characterized in that: One end of the extrusion block is fixedly connected to a vertical rod. The lower end of the vertical rod extends into the cavity and is fixedly connected to a square plug rod. The square plug rod is slidably connected to the cavity. A first spring is sleeved outside the square plug rod. One end of the first spring is fixedly connected to the cavity, and the other end is fixedly connected to the square plug rod.

7. A cold pressing forming method for a rubber washer, which is used for the cold pressing die of the rubber washer according to any one of the above claims 1-6, characterized in that, Including: S1. Introduce metal powder into the annular groove through a powder connecting pipe. Control the upper template to move downward. When the lower end of the upper template contacts the T-shaped pressing rod, the hydraulic oil in the liquid storage cavity enters the liquid guide cavity. The push plate moves upward to drive the annular plate to move. Under the extrusion of the downward-moving upper template and the upward-moving annular plate, the metal powder is cold-pressed into a metal gasket ring. S2. Move the upper template upward by a certain distance so that the protruding part at the lower end of the upper template is flush with the upper end of the cold-pressed metal gasket ring. Transport the rubber liquid to the guiding cavity. The rubber liquid entering the guiding cavity will push the I-shaped push rod to move into the limiting cavity, and at the same time, the clamping end of the special-shaped locking rod will disengage from the clamping hole. When the I-shaped push rod contacts the pushing block, the pushing block will be pushed by the rubber liquid to move. S3. When the pushing block moves, the extrusion block is pushed to move upward. At this time, the vertical rod moves to drive the square plug rod to move, and the cavity is communicated with the external environment. The rubber liquid will enter the cavity through the communication cavity, and finally enter between the metal gasket ring and the upper template. Turn on the electromagnet so that the connecting plate drives the T-shaped rod to move when moving. Turn on the telescopic cylinder to drive the connecting plate to move upward. Several arc-shaped plates push the processed metal gasket ring and the rubber ring out of the annular groove, and take away the processed metal gasket ring and the rubber ring.

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