CN212495393U

CN212495393U - Quick reset type powder metallurgy pressing die

Info

Publication number: CN212495393U
Application number: CN202021062043.XU
Authority: CN
Inventors: 樊晔; 王俊; 朱腾达
Original assignee: Suzhou Jinding Metallurgy Co ltd
Current assignee: Suzhou Jinding Metallurgy Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-09
Anticipated expiration: 2030-06-10

Abstract

The utility model provides a quick-reset powder metallurgy pressing die, which comprises an upper die and a lower die, wherein a pressing hole, a movable hole and a driving hole are sequentially communicated from top to bottom on the lower die, a pressing head is arranged on the upper die, the cross section area of the pressing hole and the cross section area of the driving hole are both larger than that of the movable hole, the die also comprises a supporting body, the cross section of the supporting body is matched with that of the pressing hole, a movable rod is arranged at the bottom of the supporting body, the middle part of the movable rod is movably positioned in the movable hole, the bottom of movable rod is arranged in the drive hole, rotates in the drive hole and is provided with the drive ring, is provided with the jacking portion that the horizontal projection is right triangle and the stagnant portion that the horizontal projection is the rectangle on the drive ring, and two right-angle sides of jacking portion horizontal projection are laminated in one side of drive ring and stagnant portion respectively, and the top of jacking portion and the top of stagnant portion are equal height. The utility model provides a quick reset type powder metallurgy embossing mold utensil can improve production efficiency.

Description

Quick reset type powder metallurgy pressing die

Technical Field

The utility model belongs to the technical field of powder metallurgy processing, a quick reset type powder metallurgy embossing mold utensil is related to.

Background

Powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. The powder metallurgy method has similar places to the production of ceramics and belongs to the powder sintering technology, so a series of new powder metallurgy technologies can also be used for preparing ceramic materials. Due to the advantages of the powder metallurgy technology, the powder metallurgy technology becomes a key for solving the problem of new materials, and plays a significant role in the development of the new materials.

Wherein, in the production process of the powder metallurgy product (such as a powder metallurgy gear), the core part is a die of the powder metallurgy product; the die comprises an upper die and a lower die capable of lifting, wherein a pressing hole matched with a part is formed in the lower die, a supporting body with a fixed position is arranged in the pressing hole, and the upper die comprises a pressing head matched with the pressing hole. During production, powder is poured into a pressing hole at first, then an upper die moves downwards, a pressing head is pressed into the pressing hole, the pressing head and a support body are used for extrusion, the pressing hole is used for limiting, the powder is pressed and bonded, meanwhile, the powder has a set shape, and a rudiment product is formed; then the upper die lifts up with the pressure head to be separated from the rudiment product, then the lower die descends, the supporting body keeps the position to be fixed, the rudiment product is exposed out of the pressing hole through the limiting of the supporting body, the rudiment product is pushed away by a pushing structure or manpower on the equipment, the lower die is lifted to the set height after the product is pushed away (at the moment, the top of the lower die is higher than the top of the supporting body), and the second round of processing is started, so in the past.

The lower die is reduced in height, and then the rudiment product is ejected out through the supporting body, so that the purpose of protecting the rudiment product is achieved, and the whole bottom area of the rudiment product is supported by the supporting body, so that the rudiment product can be well prevented from being broken and the like; however, in practice, it has been found that, in this method, since the lower mold and the portion connected with the lower mold have a large mass, the lifting speed of the structure for driving the lower mold and the portion connected with the lower mold is generally slow, and thus the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a quick reset type powder metallurgy embossing mold utensil aims at solving the problem that production efficiency is low.

In order to solve the technical problem, the utility model provides a quick reset type powder metallurgy pressing die, which comprises an upper die and a lower die positioned under the upper die, wherein a pressing hole, a movable hole and a driving hole are sequentially communicated from top to bottom on the lower die, a pressing head matched with the pressing hole is arranged on the upper die, the cross section area of the pressing hole and the cross section area of the driving hole are both larger than the cross section area of the movable hole, the die also comprises a supporting body, the cross section of the supporting body is matched with the cross section of the pressing hole, a movable rod is arranged at the bottom of the supporting body, the middle part of the movable rod is movably positioned in the movable hole, the bottom end of the movable rod is positioned in the driving hole, a driving ring is rotatably arranged in the driving hole, a jacking part with a right triangle horizontal projection and a stagnation part with a rectangle horizontal projection are arranged on the driving ring, two right-angle sides of the horizontal projection of the jacking portion are respectively attached to one side of the driving ring and one side of the stagnation portion, the top of the jacking portion is equal to the top of the stagnation portion in height, the bottom end of the movable rod can abut against the driving ring or the jacking portion or the stagnation portion, when the bottom end of the movable rod abuts against the driving ring, the bottom end of the support body abuts against the bottom end of the pressing hole, and when the bottom end of the movable rod abuts against the stagnation portion, the top end of the support body is equal to the top end of the pressing hole in height.

The utility model discloses further set up as, the movable rod is including the rotation pearl that is located the bottom, the movable conflict of rotation pearl in the drive ring or the jacking portion or the stagnation portion.

The utility model discloses further set up to, annular flourishing chip groove has been seted up vertically to the bottom periphery in suppression hole, flourishing chip groove with the suppression hole communicates with each other.

The utility model discloses further set up to, a plurality of clearance hole has vertically been seted up to the bottom of flourishing chip groove, the top in clearance hole with flourishing chip groove communicates with each other, the bottom with the drive hole communicates with each other.

The utility model discloses further set up to, the lower mould is including the bottom plate, the bottom plate is located under the drive hole, seted up on the bottom plate and rotated the hole, be located directly over rotating the hole be provided with supporting bearing on the bottom plate, supporting bearing's axle center rotate the hole the axle center and the axle center collineation of drive ring, just the internal diameter of drive ring is less than rotate the hole the diameter and supporting bearing's internal diameter, the fixed actuating lever that is provided with on the inner wall of drive ring, the actuating lever is external to have and is used for the drive actuating lever pivoted driving motor.

The utility model discloses further set up to, support bearing is thrust bearing.

The utility model discloses further set up to, the jacking portion and the stagnation portion is in all be provided with two, two on the drive ring jacking portion and two the stagnation portion respectively with the axle center of drive ring is central symmetry for the symmetry axis.

The utility model discloses further set up to, the articulated operating door that is provided with on the lower mould.

The utility model discloses further set up to, the outer wall activity of movable rod laminate in the inner wall in activity hole.

The utility model discloses further set up to, be provided with the elastic component on the bottom plate, the one end of elastic component with the bottom plate is connected, the other end with the movable rod is connected.

Compared with the prior art, the utility model provides a quick reset type powder metallurgy embossing mold utensil adds man-hour, at first pour metallurgical powder into the embossing hole, then go up the mould and drive the suppression head and descend, the activity of suppression head is suppressed the powder in the embossing hole, at the in-process of this suppression, suppression head and supporter play the squeezing action to the upper and lower both ends of powder, then the inner wall in embossing hole plays spacing effect to the powder on every side, until suppression head suppression to suitable position after, the suppression head is driven to rise by last mould.

Meanwhile, the driving ring is continuously rotated in the whole machining process, wherein the bottom ends of the movable rods movably abut against the upper surface of the driving ring (or slightly higher than the upper surface of the driving ring) when powder is put in and pressed, the heights of the movable rods and the supporting body are unchanged in the process because the upper surface of the driving ring is in the same plane, and the bottom ends of the supporting body abut against the lower die at the bottom end of the pressing hole at the moment, so that excessive force can not be applied to the driving ring by the movable rods; when the pressing is finished, the upper die is lifted or ascended again, the driving ring rotates to enable the bevel edge of the jacking portion to act on the bottom end of the movable rod, the height of the movable rod is increased in the process, and meanwhile, the supporting body and the prototype product are driven to lift (if the jacking portion acts on the movable rod after the upper die is lifted to the highest position, the rotating speed of the driving ring is not limited, but if the lifting of the upper die and the action of the jacking portion on the movable rod are synchronous, the rotating speed of the driving ring is controlled, so that the lifting speed of the supporting body is slightly lower than the lifting speed of the pressing head); when the parison product rises to the bottom of the parison product which is just as high as the top of the lower die, the driving ring also just rotates to the position that the stagnation part is positioned at the bottom end of the movable rod, wherein the movable rod is not immediately separated from the stagnation part because the plane of the top end of the stagnation part has a certain length or path, but stay on the stagnation part for a certain time, and the time is that the structure for pushing the rudiment product pushes the rudiment product or manually pushes the rudiment product, after the rudiment product is separated from the supporting body, the driving stagnation part of the driving ring is just staggered with the movable rod, and the bottom end of the movable rod without a supporting structure can fall under the action of gravity until the bottom end of the supporting body is abutted against the bottom end of the pressing hole, and the bottom end of the movable rod is also contacted with the top of the driving ring (or the bottom end of the movable rod is slightly higher than the driving ring), and then the next processing is carried out, so that the prior art is realized.

In the separation process of the prototype product and the lower die, only the movable rod, the supporting body and the prototype product are required to be lifted, so that the total mass is low, the lifting speed is high when the lifting is controlled, the processing efficiency can be improved in actual use, and the quality of the part needing to be controlled to lift is low, so that the energy consumption for controlling is low, the equipment requirement is low, and the production cost is low.

Meanwhile, the lifting structure and power for controlling the upper die can be a power structure on conventional powder metallurgy gear production equipment, or a conventional air cylinder or oil cylinder and the like, and since the driving structure of the upper die is not in the range claimed by the application and is relatively universal, the description is not repeated herein. Similarly, the structure for removing the prototype product can be a structure which is currently used and commonly used, and can also be carried out in a manual mode and the like, and the limitation is not too much; likewise, the structure and manner of pouring the metallurgical powder into the compacting orifice is not overly limited.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the quick-return powder metallurgy pressing die of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the rapid return powder metallurgy pressing die of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a cross-sectional view of an embodiment of a lower die of the rapid return powder metallurgy pressing die of the present invention;

FIG. 5 is a schematic structural view of an embodiment of a support body and a movable rod in the quick-return powder metallurgy pressing mold according to the present invention;

FIG. 6 is a schematic structural view of an embodiment of a partial structure in the rapid-return powder metallurgy pressing mold according to the present invention;

fig. 7 is a cross-sectional view of fig. 6.

Wherein, 1, an upper die; 2. a lower die; 3. pressing holes; 4. a movable hole; 5. a drive aperture; 6. pressing a head; 7. a support body; 8. a movable rod; 9. a drive ring; 10. a jacking portion; 11. a stagnation portion; 12. rotating the beads; 13. a chip containing groove; 14. cleaning the holes; 15. a base plate; 16. rotating the hole; 17. a support bearing; 18. an operating door; 19. an elastic member.

Detailed Description

The quick-return powder metallurgy pressing mold according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. The same or similar reference numbers in the drawings identify the same or similar elements.

The utility model provides a quick reset type powder metallurgy embossing mold utensil, as shown in fig. 1 to 7, include and go up mould 1 and be located go up mould 1 lower mould 2 under mould 1, top-down communicates with each other in proper order and has seted up embossing hole 3, activity hole 4 and drive hole 5 on lower mould 2, go up be provided with on the mould 1 with embossing head 6 of embossing hole 3 matched with, the cross sectional area of embossing hole 3 and the cross sectional area of drive hole 5 all is greater than the cross sectional area of activity hole 4, still including supporter 7, the cross section of supporter 7 with the cross section of embossing hole 3 cooperatees, the bottom of supporter 7 is provided with movable rod 8, the middle part activity of movable rod 8 is located in the activity hole 4, the bottom of movable rod 8 is located in the drive hole 5, it is provided with drive ring 9 to rotate in the drive hole 5, be provided with on the drive ring 9 that the horizontal projection is right triangle's top lift portion 10 and the horizontal projection is rectangle The two right-angle sides of the horizontal projection of the lifting portion 10 are respectively attached to one side of the driving ring 9 and one side of the stopping portion 11, the top of the lifting portion 10 is equal to the top of the stopping portion 11 in height, the bottom end of the movable rod 8 can abut against the driving ring 9 or the lifting portion 10 or the stopping portion 11, when the bottom end of the movable rod 8 abuts against the driving ring 9, the bottom end of the supporting body 7 abuts against the bottom end of the pressing hole 3, and when the bottom end of the movable rod 8 abuts against the stopping portion 11, the top end of the supporting body 7 is equal to the top end of the pressing hole 3 in height.

The movable rod 8 comprises a rotating ball 12 at the bottom end, and the rotating ball 12 can movably abut against the driving ring 9 or the lifting part 10 or the stagnation part 11.

The periphery of the bottom end of the pressing hole 3 is vertically provided with an annular chip containing groove 13, and the chip containing groove 13 is communicated with the pressing hole 3. The bottom end of the chip containing groove 13 is vertically provided with a plurality of cleaning holes 14, the top ends of the cleaning holes 14 are communicated with the chip containing groove 13, and the bottom ends of the cleaning holes 14 are communicated with the driving hole 5.

Lower mould 2 is including bottom plate 15, bottom plate 15 is located under drive hole 5, rotation hole 16 has been seted up on bottom plate 15, be located directly over rotation hole 16 be provided with supporting bearing 17 on bottom plate 15, supporting bearing 17's axle center rotating hole 16's axle center and the axle center collineation of drive ring 9, just the internal diameter of drive ring 9 is less than rotate hole 16's diameter and supporting bearing 17's internal diameter, the fixed actuating lever that is provided with on the inner wall of drive ring 9, the actuating lever is external to have and is used for the drive actuating lever pivoted driving motor. The support bearing 17 is a thrust bearing.

The two lifting portions 10 and the two stagnation portions 11 are provided on the drive ring 9, and the two lifting portions 10 and the two stagnation portions 11 are respectively centrosymmetric about the axial center of the drive ring 9 as a symmetric axis. An operating door 18 is hinged on the lower die 2. The outer wall of the movable rod 8 is movably attached to the inner wall of the movable hole 4.

An elastic piece 19 is arranged on the bottom plate 15, one end of the elastic piece 19 is connected with the bottom plate 15, and the other end of the elastic piece 19 is connected with the movable rod 8. In this embodiment, the elastic member 19 is preferably an elastic rubber band, and a common elastic object such as a spring may be selected according to actual conditions.

The utility model provides a quick reset type powder metallurgy embossing mold utensil, add man-hour, at first pour into the suppression hole 3 with metallurgical powder, then go up mould 1 and drive suppression head 6 and descend, suppression head 6 activity is suppressed the powder in suppression hole 3, at the in-process of this suppression, suppression head 6 and supporter 7 play the squeezing action to the upper and lower both ends of powder, then the inner wall in suppression hole 3 plays spacing effect around to the powder, after suppression head 6 suppresses suitable position, suppression head 6 is gone up mould 1 and is driven the rising.

Meanwhile, the driving ring 9 is continuously rotated in the whole process of machining, wherein the bottom end of the movable rod 8 is movably abutted against the upper surface of the driving ring 9 (or slightly higher than the upper surface of the driving ring 9) when powder is put in and pressed, the heights of the movable rod 8 and the supporting body 7 are not changed in the process because the upper surface of the driving ring 9 is in the same plane, and the bottom end of the supporting body 7 is abutted against the lower die 2 at the bottom end of the pressing hole 3 at the moment, so that the movable rod 8 does not apply excessive force to the driving ring 9; when the pressing is completed, the upper die 1 is lifted completely or is lifted again, the driving ring 9 rotates to enable the bevel edge of the lifting part 10 to act on the bottom end of the movable rod 8, in the process, the height of the movable rod 8 is increased, and meanwhile, the supporting body 7 and the blank product are also driven to lift (if the lifting part 10 acts on the movable rod 8 after the upper die 1 is lifted to the highest, the rotating speed of the driving ring 9 does not need to be limited, but if the lifting of the upper die 1 and the acting of the lifting part 10 on the movable rod 8 are synchronous, the rotating speed of the driving ring 9 needs to be controlled, so that the lifting speed of the supporting body 7 is slightly lower than the lifting speed of the pressing head 6); when the parison product rises to the bottom of the parison product which is just equal to the top of the lower die 2, the driving ring 9 also just rotates until the stagnation part 11 is positioned at the bottom end of the movable rod 8, wherein the movable rod 8 can not be separated from the stagnation part 11 immediately due to the fact that the plane of the top end of the stagnation part 11 has a certain length or path, but can stay on the stagnation part 11 for a certain time, the time is the time for pushing the structure of the parison product to push the parison product or pushing the parison product manually, after the parison product is separated from the supporting body 7, the driving ring 9 drives the stagnation part 11 to be just staggered with the movable rod 8, at the moment, the structure without support at the bottom end of the movable rod 8 falls under the action of gravity until the bottom end of the supporting body 7 is abutted against the bottom end of the pressing hole 3, and the bottom end of the movable rod 8 is also contacted with the top of the driving ring 9 (or the bottom end of the movable, then, the next processing is carried out, as before.

In the separation process of the prototype product and the lower die 2, only the movable rod 8, the supporting body 7 and the prototype product are required to be lifted, so that the total mass is low, the lifting speed is high when the lifting is controlled, the machining efficiency can be improved in actual use, and the energy consumption for controlling is low, the equipment requirement is low, and the production cost is low because the mass of the part needing to be controlled to be lifted is low.

Meanwhile, the lifting structure and power for controlling the upper die 1 may be a power structure on a conventional powder metallurgy gear production device, or a conventional air cylinder or oil cylinder, etc., and since the driving structure of the upper die 1 is neither within the scope of the present application, but is also relatively general, it will not be described in detail herein. Similarly, the structure for removing the prototype product can be a structure which is currently used and commonly used, and can also be carried out in a manual mode and the like, and the limitation is not too much; likewise, the structure and manner of pouring the metallurgical powder into the compacting orifice 3 is not overly restrictive.

In the rotating process of the driving ring 9, the movable rod 8 is movably abutted against the driving ring 9 or the jacking part 10 or the stagnation part 11 through the rotating ball 12 at the bottom end of the movable rod, so that the abrasion of the structures can be reduced, the service life is prolonged, the load of the driving motor is reduced, the driving motor is protected, the energy consumption is reduced, and the noise is reduced.

After a small part of powder falls into the pressing hole 3, the chip containing groove 13 can hold the powder in the processing process, but in the subsequent cleaning process, the support body 7 and the movable rod 8 can be pulled out, and then the residual powder is cleaned through the movable hole 4, the chip containing groove 13 and the cleaning hole 14.

The rotation power of the driving ring 9 comprises a driving motor and a driving rod, wherein the driving motor can be a common servo motor, a stepping motor or a conventional speed reducing motor and the like, and the driving rod is an output shaft of the driving motor and can be clamped with or welded with the driving ring 9 or connected with the driving ring in a key groove mode; in the using process, the rotating speed of the driving ring 9 is controlled by the driving motor with fixed position, and the diameter of the driving ring 9, the size of the jacking part 10 and the size of the stagnation part 11 are designed, so that the driving ring 9 can continuously rotate at a constant speed in the whole production process, and then parts can be continuously and stably produced. The inner diameter of the drive ring 9 is smaller than the diameter of the rotation hole 16 and the inner diameter of the support bearing 17 so that the drive rod can normally rotate without being worn by the outside. Meanwhile, the support bearing 17 is a thrust bearing, so that the support bearing has the characteristic of better bearing pressure.

The lift-up portion 10 and the stagnation portion 11 are provided in two, respectively, but other numbers may be selected depending on the actual situation, for example, if the drive ring 9 is large, more lift-up portions 10 and stagnation portions 11 may be provided. When clearing up or maintaining and changing or overhauing in the drive hole 5, can assist through opening operation door 18, wherein the top of operation door 18 has magnet, and it passes through magnet absorption on the outer wall of lower mould 2 when not using operation door 18, then directly open operation door 18 during the use can, simple and convenient.

When the driving ring 9 rotates until the movable lever 8 is separated from the end of the stagnation portion 11, the elastic member 19 contracts, and the descent of the movable lever 8 and the supporting body 7 can be accelerated; wherein it is preferred that the elastic element 19 is in an extended state during the entire use. In the lifting process of the movable rod 8, the outer wall of the movable rod is always attached to the inner wall of the movable hole 4, so that the movable rod 8 has high moving direction and position stability and high processing quality.

It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims

1. The utility model provides a quick reset type powder metallurgy embossing mold utensil, its characterized in that, including last mould (1) and be located go up mould (2) under (1), top-down communicates with each other in proper order and has seted up embossing hole (3), activity hole (4) and drive hole (5) on lower mould (2), go up and be provided with on mould (1) with embossing head (6) of embossing hole (3) matched with, the cross sectional area of embossing hole (3) and the cross sectional area of drive hole (5) all are greater than the cross sectional area of activity hole (4), still include supporter (7), the cross section of supporter (7) and the cross sectional area of embossing hole (3) cooperate, the bottom of supporter (7) is provided with movable rod (8), the middle part activity of movable rod (8) is located in activity hole (4), the bottom end of the movable rod (8) is positioned in the driving hole (5), a driving ring (9) is rotatably arranged in the driving hole (5), a jacking portion (10) with a right-angled triangle horizontal projection and a stagnation portion (11) with a rectangular horizontal projection are arranged on the driving ring (9), two right-angled edges of the horizontal projection of the jacking portion (10) are respectively attached to one side of the driving ring (9) and one side of the stagnation portion (11), the top of the jacking portion (10) is equal to the top of the stagnation portion (11), the bottom end of the movable rod (8) can be abutted against the driving ring (9) or the jacking portion (10) or the stagnation portion (11), when the bottom end of the movable rod (8) is abutted against the driving ring (9), the bottom end of the support body (7) is abutted against the bottom end of the pressing hole (3), and when the bottom end of the movable rod (8) is abutted against the bottom end of the stagnation portion (11), the top end of the support body (7) is equal to the top end of the pressing hole (3) in height.

2. A powder metallurgy compaction die with rapid reset according to claim 1 wherein the movable rod (8) comprises a rotating ball (12) at the bottom end, the rotating ball (12) being movable against the driving ring (9) or the lifting part (10) or the stagnation part (11).

3. The quick-return powder metallurgy pressing die according to claim 1 or 2, wherein the pressing hole (3) is vertically provided with an annular chip containing groove (13) at the bottom end periphery, and the chip containing groove (13) is communicated with the pressing hole (3).

4. The quick-reset powder metallurgy pressing die according to claim 3, wherein the bottom end of the chip containing groove (13) is vertically provided with a plurality of cleaning holes (14), the top ends of the cleaning holes (14) are communicated with the chip containing groove (13), and the bottom ends of the cleaning holes are communicated with the driving hole (5).

5. The quick-reset powder metallurgy pressing die according to claim 1, wherein the lower die (2) comprises a bottom plate (15), the bottom plate (15) is located under the driving hole (5), a rotating hole (16) is formed in the bottom plate (15), a supporting bearing (17) is arranged on the bottom plate (15) located over the rotating hole (16), the axis of the supporting bearing (17), the axis of the rotating hole (16) and the axis of the driving ring (9) are collinear, the inner diameter of the driving ring (9) is smaller than the diameter of the rotating hole (16) and the inner diameter of the supporting bearing (17), a driving rod is fixedly arranged on the inner wall of the driving ring (9), and the driving rod is externally connected with a driving motor for driving the driving rod to rotate.

6. A rapid return powder metallurgy compaction die according to claim 5 wherein the support bearing (17) is a thrust bearing.

7. The rapid reset powder metallurgy pressing mold according to claim 1, wherein two of the lifting portions (10) and the stagnation portions (11) are provided on the driving ring (9), and the two lifting portions (10) and the two stagnation portions (11) are respectively centrosymmetric about an axial center of the driving ring (9).

8. A rapid return powder metallurgy compaction tool according to claim 1 wherein the lower die (2) is hinged with an operating door (18).

9. A rapid return powder metallurgy compaction tool according to claim 1 wherein the outer wall of the movable rod (8) is in movable abutment with the inner wall of the movable orifice (4).

10. A powder metallurgy compaction die with quick return according to claim 5 wherein the base plate (15) is provided with a resilient member (19), one end of the resilient member (19) being connected to the base plate (15) and the other end being connected to the movable bar (8).