Cold pressing forming method and die for rubber gasket

Abstract

The invention relates to the technical field of powder cold-pressing forming equipment, in particular to a rubber gasket cold-pressing forming method and a die. The die comprises a lower die plate and an upper die plate, a plurality of annular grooves are formed in the upper end of the lower die plate, annular plates are slidably connected into the annular grooves, and the lower ends of the annular plates are connected with an extrusion mechanism; the extrusion mechanism is arranged in the lower die plate, and one end of the extrusion mechanism extends out of the upper end of the lower die plate; when the upper die plate moves downwards, the upper die plate makes contact with the extending end of the extrusion mechanism, the extrusion mechanism drives the annular plate to move upwards along the annular groove, under extrusion of the upper die plate moving downwards and the annular plate moving upwards, metal powder is cold-pressed into the metal backing ring, and rubber liquid enters the position between the metal backing ring and the upper die plate; and after molding, the jacking mechanism is used for jacking out the metal backing ring and the rubber ring, so that the metal backing ring and the rubber ring can be produced in one device, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of powder cold pressing forming equipment, in particular to a cold pressing forming method and a mould for a rubber gasket. Background Art

[0002] For example, the Chinese patent with announcement number CN204975324U discloses a cold forming mold, which is provided with a pressing plate, a punch I, a die, a rubber gasket and a punch II. A cylindrical groove is provided in the center of the lower surface of the pressing plate, and the cylindrical groove is clearance-matched with the top end of the punch I. The punch I is a cylindrical punch, and the outside of the die is cylindrical, and a cylindrical cavity is provided in the center. The bottom end of the punch I is clearance-matched with the upper part of the die, and the top end of the punch II is clearance-matched with the lower part of the die. The rubber gasket is clearance-matched installed on the punch II and is in full contact with the lower surface of the die. The punch I and the punch II form a cavity with the die to set the workpiece.

[0003] However, the above scheme has the following shortcomings: in the above patent, the molding powder is placed in the concave mold and tamped, the convex mold I is assembled into the concave mold cavity and the powder is compacted, the mold is placed on the workbench of the press machine, and the press head is pressed into the shallow groove on the upper surface of the pressing plate for press molding. However, for the production of combined rubber gaskets, since the combined rubber gasket is composed of a metal ring and a rubber gasket, most of the existing production methods are to produce the metal ring and the rubber gasket separately, and then combine the two to form a combined rubber gasket. It is impossible to produce a composite rubber gasket in one device. For this reason, we introduce a rubber gasket cold pressing forming method and mold. Summary of the invention

[0004] The object of the present invention is to provide a rubber gasket cold pressing forming method and a mold to solve the problems raised in the above background technology.

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

[0006] A rubber gasket cold-pressing forming die comprises a lower die plate and an upper die plate, wherein the upper end of the lower die plate is provided with a plurality of annular grooves, an annular plate is slidably connected in the annular groove, the lower end of the annular plate is connected with an extrusion mechanism, the extrusion mechanism is arranged in the lower die plate, one end of the extrusion mechanism extends from the upper end of the lower die plate, and contacts with the extended end of the extrusion mechanism when the upper die plate moves downward, so that the extrusion mechanism drives the annular plate to move upward along the annular groove, and a plurality of lifting mechanisms are arranged in the upper end of the annular plate, and the metal gasket after processing is pushed out of the annular groove by the lifting mechanisms;

[0007] A plurality of guide cavities are provided in the upper end of the upper template, and a plurality of pushing mechanisms are slidably connected in the guide cavity. The pushing mechanism is in contact with the sealing mechanism, and the sealing mechanism is slidably connected in the cavity. The upper end of the cavity is connected to the guide cavity, and the lower end is connected to the external environment. Liquid enters the guide cavity to push the pushing mechanism to move, and the sealing structure is driven to move upward by the movement of the pushing mechanism, so that the lower end of the cavity is connected to the external environment. A connecting cavity is provided in the upper end of the cavity, and the upper end of the connecting cavity is connected to the guide cavity. A plurality of powder connecting tubes are fixedly connected to one side of the lower template, and one end of the powder connecting tube is connected to the annular groove.

[0008] Preferably, the extrusion mechanism includes a push plate, which is slidably connected to a connecting cavity, which is opened in a lower template, and two connecting rods are fixedly connected to the upper end of the push plate, which extend into the annular groove at one end away from the push plate and are fixedly connected to the annular plate, and the lower end of the connecting cavity is connected to a liquid guide cavity, which is opened in the lower template, and the liquid guide cavity is connected to a liquid storage cavity at one end away from the connecting cavity, which is opened in the lower template, and a T-shaped pressure rod is slidably connected in the liquid storage cavity, and the upper end of the T-shaped pressure rod extends into the external environment, and hydraulic oil is provided in the liquid storage cavity.

[0009] Preferably, the lifting mechanism includes an arc-shaped plate, which is arranged in the upper end of the annular plate, and a T-shaped rod is movably connected in the annular plate, and 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, and several outer sides of the T-shaped rods are slidably connected in the connecting plate. Several electromagnets are provided in the connecting plate, and the positions of the electromagnets and the T-shaped rods correspond to each other. A telescopic cylinder is fixedly connected in the lower end of the lower template, and 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 defined in one end of the pushing block, an I-shaped push rod is slidably connected in the limiting cavity, the I-shaped push rod extends into the guide cavity away from one end of the limiting 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, a special-shaped locking rod is fixedly connected to the lower end of the I-shaped push rod, the special-shaped locking rod is movably connected in the pushing block, the clamping end of the special-shaped locking rod extends into the external environment, and the pushing block is inclined away from one end of the I-shaped push rod.

[0011] Preferably, the sealing mechanism includes an extrusion block, which is slidably connected in the guide cavity. The lower end of the extrusion block is arranged in an inclined shape. The lower end of the extrusion block contacts the inclined end of the pushing block. A snap-in hole is opened in one end of the extrusion block away from the pushing block, and the snap-in end of the special-shaped locking rod is snap-into the snap-in 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 the square blocking rod, the square blocking rod is slidably connected to the cavity, a first spring is sleeved on the outside of the square blocking rod, one end of the first spring is fixedly connected to the cavity, and the other end is fixedly connected to the square blocking rod.

[0013] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a rubber gasket cold pressing forming method, which is used for the above-mentioned rubber gasket cold pressing mold, comprising:

[0014] S1. Metal powder is introduced into the annular groove through the powder connecting pipe, and the upper template is controlled to move downward. When the lower end of the upper template contacts the T-shaped pressure rod, the hydraulic oil in the liquid storage cavity enters the liquid guide 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, move the upper template upward for a distance so that the raised part of the lower end of the upper template is flush with the upper end of the cold-pressed metal gasket, and deliver the rubber liquid into the guide cavity. The rubber liquid entering the guide cavity will push the I-shaped push rod to move into the limit cavity, and at the same time, the clamping end of the special-shaped locking rod will be separated from the clamping hole. When the I-shaped push rod contacts the push block, the push block will be pushed to move by the rubber liquid;

[0016] S3. When the push block moves, the extrusion block is squeezed and moves upward. At this time, the vertical rod moves to drive the square blocking rod to move, and the cavity is connected with the external environment. The rubber liquid will enter the cavity through the connecting cavity, and finally enter between the metal gasket and the upper template. Turn on the electromagnet to make the connecting plate drive the T-bar to move when it moves. Turn on the telescopic cylinder to drive the connecting plate to move upward. Several arc plates push the processed metal gasket and rubber ring out of the annular groove upward, and take away the processed metal gasket and rubber ring.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: when the upper template moves downward, it contacts the protruding end of the extrusion mechanism, so that the extrusion mechanism drives the annular plate to move upward along the annular groove, and under the extrusion of the upper template moving downward and the annular plate moving upward, the metal powder is cold-pressed into a metal gasket, and by conveying the rubber liquid into the guide cavity, the pushing mechanism will contact the sealing mechanism along the guide cavity. At this time, the sealing mechanism will cancel the sealing of the cavity, and the rubber liquid will enter between the metal gasket and the upper template. After molding, the metal gasket and the rubber ring can be ejected by the lifting mechanism, thereby realizing the production of metal gaskets and rubber rings in one device, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0020] Figure 3 This is a cross-sectional structural schematic diagram of the connection relationship between the push block and the extrusion block of the present invention;

[0021] Figure 4 This is a schematic diagram of the top view of the lower template of the present invention;

[0022] Figure 5 It is a three-dimensional cross-sectional structural schematic diagram of the connection relationship between the extrusion block and the push block of the present invention;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the connection relationship between the square blocking rod and the extrusion block of the present invention;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the connection relationship between the annular plate and the arc plate of the present invention;

[0025] Figure 8 It is a three-dimensional structural schematic diagram of the connection relationship between the T-bar and the annular plate of the present invention;

[0026] Fig. 9 It is a three-dimensional cross-sectional structural schematic diagram of the connection relationship between the metal gasket and the rubber ring of the present invention;

[0027] Fig.10 It is a three-dimensional structural schematic diagram of the connection relationship between the metal gasket and the rubber ring of the present invention.

[0028] In the figure: 1. lower template; 2. upper template; 3. push plate; 4. connecting chamber; 5. telescopic cylinder; 6. connecting plate; 7. electromagnet; 8. T-bar; 9. liquid guiding chamber; 10. annular groove; 11. annular plate; 12. T-bar; 13. liquid storage chamber; 14. square blocking rod; 15. connecting chamber; 16. cavity; 17. extrusion block; 18. push block; 19. guide chamber; 20. powder connecting tube; 21. arc plate; 22. I-shaped push rod; 23. metal gasket; 24. limit chamber; 25. limit spring; 26. special-shaped locking rod; 27. vertical rod; 28. snap-in hole; 29. ​​rubber ring; 30. first spring; 31. connecting rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 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 Example 1, in order to prevent the square blocking 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 connecting cavity 4, the connecting cavity 4 is opened in the lower template 1, and the upper end of the push plate 3 is fixedly connected to two connecting rods 31, the connecting rod 31 extends into the annular groove 10 away from the end of the push plate 3 and is fixedly connected to the annular plate 11, the lower end of the connecting cavity 4 is connected to the liquid guide cavity 9, the liquid guide cavity 9 is opened in the lower template 1, the liquid guide cavity 9 is connected to the liquid storage cavity 13 away from the end of the connecting cavity 4, the liquid storage cavity 13 is opened in the lower template 1, and a T-shaped pressure rod 12 is slidably connected in the liquid storage cavity 13, The upper end of the T-shaped pressure rod 12 extends into the external environment, and hydraulic oil is provided in the liquid storage chamber 13. When the lower end of the upper template 2 contacts the T-shaped pressure rod 12, as the upper template 2 continues to move downward, the T-shaped pressure rod 12 will be squeezed to move along the liquid storage chamber 13. At this time, the hydraulic oil in the liquid storage chamber 13 will enter the liquid guide chamber 9, and the hydraulic oil entering the liquid guide chamber 9 will eventually enter the connecting chamber 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 downwardly moving upper template 2 and the upwardly moving annular plate 11, the metal powder is cold-pressed into a metal gasket 23;

[0036] The lifting mechanism includes an arc plate 21, which is arranged in the upper end of the annular plate 11. A T-bar 8 is movably connected in the annular plate 11. The lower end of the T-bar 8 passes through the lower template 1 and extends into the external environment. A connecting plate 6 is provided on the lower side of the lower template 1. Several T-bars 8 are slidably connected to the connecting plate 6 on the outside. Several electromagnets 7 are provided in the connecting plate 6. The electromagnets 7 can be selected in appropriate sizes and models when in use. The positions of the electromagnets 7 and the T-bars 8 correspond. A telescopic cylinder 5 is fixedly connected in the lower end of the lower template 1. The output end of the telescopic cylinder 5 is fixedly connected to the connecting plate 6. When the electromagnet 7 is turned on, the connecting plate 6 can drive the T-bar 8 to move when it moves. When the telescopic cylinder 5 is turned on, the connecting plate 6 connected to its output end is driven to move upward. When the connecting plate 6 moves, it drives several T-bars 8 to move. At this time, several arc plates 21 push the processed metal gasket 23 and rubber ring 29 upward out of the annular groove 10.

[0037] The pushing mechanism includes a pushing block 18, a limited cavity 24 is provided in one end of the pushing block 18, a type push rod 22 is slidably connected in the limited cavity 24, the end of the type push rod 22 away from the limited cavity 24 extends into the guide cavity 19, a limited spring 25 is fixedly connected in the limited cavity 24, the other end of the limited spring 25 is fixedly connected to the type push rod 22, a special-shaped locking rod 26 is fixedly connected to the lower end of the type push rod 22, the special-shaped locking rod 26 is movably connected to the pushing block 18, and the clamping end of the special-shaped locking rod 26 extends into the external environment, pushing The end of the block 18 away from the I-shaped push rod 22 is arranged in an inclined shape. The rubber liquid entering the guide 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 limit cavity 24. At this time, the limit 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 push block 18, the push block 18 will be pushed by the rubber liquid to start moving;

[0038] The blocking mechanism includes an extrusion block 17, which is slidably connected to the guide cavity 19. The lower end of the extrusion block 17 is arranged in an inclined shape. The lower end of the extrusion block 17 contacts the inclined end of the push block 18. A clamping hole 28 is opened in the end of the extrusion block 17 away from the push block 18. The clamping end of the special-shaped locking rod 26 is clamped in the clamping hole 28. One end of the extrusion block 17 is fixedly connected to a vertical rod 27. 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 to the cavity 16. The outer side of the square blocking rod 14 is sleeved with a first spring 30. The first spring 30 is One end 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 pushing block 18 is arranged in an inclined shape, the extrusion block 17 will be squeezed to move upward during the movement of the pushing block 18. 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 connecting cavity 15, the rubber liquid will enter the cavity 16 through the connecting cavity 15, and finally enter between the metal gasket 23 and the upper template 2.

[0039] In addition, in order to achieve the above-mentioned purpose, the present invention also provides a rubber gasket cold pressing forming method, which is used for the above-mentioned rubber gasket cold pressing mold, comprising:

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

[0041] S2, move the upper template 2 upward for a distance, so that the raised part of the lower end of the upper template 2 is flush with the upper end of the cold-pressed metal gasket 23, and deliver the rubber liquid into the guide cavity 19. The rubber liquid entering the guide cavity 19 will push the type push rod 22 to move into the limit cavity 24, and at the same time make the clamping end of the special-shaped locking rod 26 disengage from the clamping hole 28. When the type push rod 22 contacts the push block 18, the push block 18 will be pushed to move by the rubber liquid;

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

[0043] Working principle: when in use, the lower template 1 and the upper template 2 are installed together with the equipment, and the metal powder is introduced into the annular groove 10 through the powder connecting pipe 20, and the upper template 2 is controlled to move downward, and 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 pressure rod 12, at this time, as the upper template 2 continues to move downward, the T-shaped pressure rod 12 will be squeezed to move along the liquid storage chamber 13. At this time, the hydraulic oil in the liquid storage chamber 13 will enter the liquid guide chamber 9, and the hydraulic oil entering the liquid guide chamber 9 will eventually enter the connecting chamber 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 the cold pressing is completed, the upper mold plate 2 will move upward by an end distance, so that the raised part of the lower end of the upper mold plate 2 is flush with the upper end of the cold-pressed metal gasket 23. When the upper mold plate 2 moves upward, under the gravity of the annular plate 11 and the push plate 3, the hydraulic oil entering the connecting chamber 4 will be pushed back into the liquid storage chamber 13 for storage. By conveying the rubber liquid into the guide chamber 19, the rubber liquid entering the guide chamber 19 will first contact with 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 limit chamber 24. At this time, the limit 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 push block 18, the push block 18 will be pushed by the rubber liquid to start moving.

[0045] Since one end of the pushing block 18 is arranged in an inclined shape, during the movement of the pushing block 18, the squeezing block 17 will be squeezed to move upward, and the squeezing block 17 moves upward to drive the vertical rod 27 to move, and the vertical rod 27 drives the square blocking rod 14 to move when moving, and at this time, the cavity 16 is connected with the external environment, and when the pushing block 18 no longer blocks the connecting cavity 15, at this time, the rubber liquid will enter the cavity 16 through the connecting cavity 15, and finally enter between the metal gasket 23 and the upper template 2. When the rubber liquid fills the cavity 16 between the upper template 2 and the metal gasket 23, the rubber liquid is transported to the guide cavity 19. Under the elastic force of the first spring 30, the square blocking rod 14 will move downward to its original position, and the pushing block 18 will also return to its original position and block the connecting cavity 15 again. Under the elastic force of the limit spring 25, the I-shaped push rod 22 returns to its original position, and 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 several T-shaped rods 8 to move. At this time, several arc plates 21 push the processed metal gaskets 23 and rubber rings 29 upward out of the annular groove 10, take away the processed metal gaskets 23 and rubber rings 29, control the arc plates 21 to return to their original positions, and re-inject metal powder into the annular groove 10 for another processing.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rubber gasket cold pressing mold, comprising a lower mold plate and an upper mold plate, characterized in that: A plurality of annular grooves are provided 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 from the upper end of the lower template, and contacts with the extended end of the extrusion mechanism when the upper template moves downward, so that the extrusion mechanism drives the annular plate to move upward along the annular groove, and a plurality of lifting mechanisms are provided in the upper end of the annular plate, and the metal gasket after processing is pushed out of the annular groove by the lifting mechanism; A plurality of guide cavities are provided in the upper end of the upper template, and a plurality of pushing mechanisms are slidably connected in the guide cavity. The pushing mechanism is in contact with the sealing mechanism, and the sealing mechanism is slidably connected in the cavity. The upper end of the cavity is connected to the guide cavity, and the lower end is connected to the external environment. Liquid enters the guide cavity to push the pushing mechanism to move, and the sealing structure is driven to move upward by the movement of the pushing mechanism, so that the lower end of the cavity is connected to the external environment. A connecting cavity is provided in the upper end of the cavity, and the upper end of the connecting cavity is connected to the guide cavity. A plurality of powder connecting tubes are fixedly connected to one side of the lower template, and one end of the powder connecting tube is connected to the annular groove.

2. The cold pressing mold for a rubber gasket according to claim 1, characterized in that: The extrusion mechanism includes a push plate, which is slidably connected to a connecting cavity, which is opened in a lower template, and two connecting rods are fixedly connected to the upper end of the push plate, and the connecting rods extend into the annular groove at one end away from the push plate and are fixedly connected to the annular plate, and the lower end of the connecting cavity is connected to a liquid guide cavity, which is opened in the lower template, and the liquid guide cavity is connected to a liquid storage cavity at one end away from the connecting cavity, which is opened in the lower template, and a T-shaped pressure rod is slidably connected in the liquid storage cavity, and the upper end of the T-shaped pressure rod extends into the external environment, and hydraulic oil is provided in the liquid storage cavity.

3. The cold pressing mold for a rubber gasket according to claim 1, characterized in that: The lifting mechanism includes an arc-shaped plate, which is arranged in the upper end of the annular plate, and 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 provided on the lower side of the lower template, and the outer sides of several T-shaped rods are slidably connected in the connecting plate. Several electromagnets are provided in the connecting plate, and the positions of the electromagnets and the T-shaped rods correspond. A telescopic cylinder is fixedly connected in the lower end of the lower template, and the output end of the telescopic cylinder is fixedly connected to the connecting plate.

4. The cold pressing mold for a rubber gasket according to claim 1, characterized in that: The pushing mechanism includes a pushing block, a limiting cavity is provided in one end of the pushing block, an I-shaped push rod is slidably connected in the limiting cavity, the I-shaped push rod extends into the guide cavity away from one end of the limiting 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, a special-shaped locking rod is fixedly connected to the lower end of the I-shaped push rod, the special-shaped locking rod is movably connected in the pushing block, the clamping end of the special-shaped locking rod extends into the external environment, and the pushing block is arranged in an inclined shape away from one end of the I-shaped push rod.

5. The cold pressing die for a rubber gasket according to claim 4, characterized in that: The blocking mechanism includes an extrusion block, which is slidably connected in the guide cavity. The lower end of the extrusion block is arranged in an inclined shape. The lower end of the extrusion block contacts the inclined end of the pushing block. A clamping hole is opened in the end of the extrusion block away from the pushing block, and the clamping end of the special-shaped locking rod is clamped in the clamping hole.

6. The cold pressing die for a rubber gasket 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 blocking rod, the square blocking rod is slidably connected to the cavity, a first spring is sleeved on the outside of the square blocking rod, one end of the first spring is fixedly connected to the cavity, and the other end is fixedly connected to the square blocking rod.

7. A rubber gasket cold pressing forming method, used for the rubber gasket cold pressing mold according to any one of claims 1 to 6, characterized in that: include: S1. Metal powder is introduced into the annular groove through the powder connecting pipe, and the upper template is controlled to move downward. When the lower end of the upper template contacts the T-shaped pressure rod, the hydraulic oil in the liquid storage cavity enters the liquid guide 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; S2, move the upper template upward for a distance so that the raised part of the lower end of the upper template is flush with the upper end of the cold-pressed metal gasket, and deliver the rubber liquid into the guide cavity. The rubber liquid entering the guide cavity will push the I-shaped push rod to move into the limit cavity, and at the same time, the clamping end of the special-shaped locking rod will be separated from the clamping hole. When the I-shaped push rod contacts the push block, the push block will be pushed to move by the rubber liquid; S3. When the push block moves, the extrusion block is squeezed and moves upward. At this time, the vertical rod moves to drive the square blocking rod to move, and the cavity is connected with the external environment. The rubber liquid will enter the cavity through the connecting cavity, and finally enter between the metal gasket and the upper template. Turn on the electromagnet to make the connecting plate drive the T-bar to move when it moves. Turn on the telescopic cylinder to drive the connecting plate to move upward. Several arc plates push the processed metal gasket and rubber ring out of the annular groove upward, and take away the processed metal gasket and rubber ring.

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