CN108145152B

CN108145152B - Forming device

Info

Publication number: CN108145152B
Application number: CN201810027533.7A
Authority: CN
Inventors: 于海青
Original assignee: Pinghu Kairongyi Machinery Technology Co Ltd
Current assignee: Zhejiang Dongtai Valve Co ltd
Priority date: 2016-09-07
Filing date: 2016-09-07
Publication date: 2020-05-22
Anticipated expiration: 2036-09-07
Also published as: CN106270502A; CN108188402B; CN108145152A; CN108188402A; CN108160992A; CN108160992B; CN106270502B

Abstract

The invention discloses a forming device, and belongs to the technical field of metallurgical equipment. The technical scheme is as follows: the forming device comprises a forming mechanism, wherein the forming mechanism comprises a support frame, a hydraulic cylinder fixed on the support frame, a lower stamping die mechanism connected to the top end of a piston rod of the hydraulic cylinder, a fixed die arranged on the support frame and above the lower stamping die mechanism, and a metal powder injection mechanism arranged above the fixed die. The invention has the beneficial effects that: the fixed die and the lower punch die of the lower punch die mechanism are mutually extruded to enable metal powder to be rapidly molded, the arrangement of the elastic supporting element enables the molded metal block to be ejected out of the hollow cylinder, and the hydraulic cylinder enables the punch die to reach preset pressure and extrusion speed in a short time, so that the qualified metal powder can be continuously molded conveniently through metering, and the lower punch die mechanism is suitable for batch production.

Description

Forming device

The scheme is a divisional application, and the original application name is as follows: the utility model provides a metallurgical automatic feeding of metal powder, forming device, the application date of former application is: 2016-09-07, the application number of the original application is: 201610805720.4.

Technical Field

The invention relates to the technical field of metallurgical equipment, in particular to a forming device for a metal powder metallurgy automatic feeding and forming device.

Background

In powder metallurgy production, the particle size of the metal powder is generally required to be 0.5-20 microns, because theoretically, the finer the particle, the larger the specific surface area, and the stronger the surface effects, such as surface activity, surface adsorption capacity, catalytic capacity, and the like. The easier the forming and sintering, the thicker powder which is larger than 40 microns is generally adopted in the traditional powder metallurgy process, and the metallurgical production requirements of good surface activity, adsorption force and catalytic capacity which are extremely high cannot be met.

In addition, the control of the feeding precision of the powder metallurgy has great influence on the quality of the powder metallurgy product, the feeding precision influences the size and the appearance quality of the powder metallurgy product, and meanwhile, the feeding precision has great influence on the production efficiency, the production cost and the production environment.

Powder metallurgy forming is one of the basic processes in powder metallurgy production, with the aim of making loose powders into semi-finished or finished products of predetermined geometry, size, density and strength; die pressing (steel die) forming is the most widely used forming method in powder metallurgy production; hot isostatic pressing, hot extrusion, hot forging and other hot forming methods are adopted; the powder metallurgy forming method is characterized in that metal powder is mixed and then placed into an extrusion die, plasticized powder is extruded out through an extrusion nozzle with a certain geometric shape under the action of external force to form various pipes, bars and other special-shaped semi-finished products, the requirements of the forming process in the powder metallurgy production on pre-pressing pressure and extrusion speed are strict, the current pre-pressing pressure is difficult to reach the preset pressure in a short time, the extrusion speed is low, and the metal powder forming efficiency is directly reduced.

The invention aims to accurately and quickly control the feeding precision of powder metallurgy and enable the particle size of metal powder to meet the requirement, and achieve the preset pressure and extrusion speed in a short time.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to: provides an automatic feeding and forming device for metal powder metallurgy.

The invention idea of the invention is: aiming at the problems that the prior powder metallurgy process in the powder metallurgy production adopts thicker powder with the particle size larger than 40 microns, cannot meet the metallurgy production requirement with good surface activity, extremely high requirements on adsorption force and catalytic capacity, cannot realize automatic control on the feeding precision of powder metallurgy, and cannot reach preset pressure and extrusion speed in a short time to influence the forming of metal powder, the invention designs an automatic feeding and forming device for metal powder metallurgy, and the automatic feeding and forming device for metal powder metallurgy, wherein the automatic feeding and forming device comprises a rack, a crushing mechanism, a feeding mechanism, a weighing mechanism and a limiting material leakage mechanism; pouring metal powder into a metal powder feeding bin from a feeding port, sequentially passing through a through hole of a turntable A of a grinding mechanism, leaking the fed metal powder into a grinding track to be ground by a grinding disc, conveying the ground metal powder into a metal powder feeding bin of a feeding mechanism through a material leaking pipe, conveying the fed metal powder into a discharging pipe in the middle of a weighing backing plate of the weighing mechanism under the conveying of a spiral blade, determining that the amount of the fed metal powder reaches the weight set by a standard of metal forming through a retransmission sensor, starting a speed reducing motor B, moving a moving gear along the inner side surface of a fixed ring, simultaneously driving a limiting block at the end part of a driving pull rod to move along a shell towards a base, and when a discharging port is opposite to a limiting hole, the fed metal powder in the discharging pipe leaks down, all the fed metal powder in the discharging pipe falls down to enter a hollow cylindrical injector in the fixed bin, under the action of the elastic restoring force of a return spring, injecting metal powder in the hollow cylindrical injector into a hollow cylinder through a metal powder leaking channel arranged at the center of the upper section of a fixed die, driving a piston rod to move upwards by a hydraulic cylinder, separating a lower chassis from a lower stamping die by a support frame, simultaneously driving an extrusion block to move upwards by the piston rod, driving the lower stamping die to move upwards by the extrusion block and an elastic supporting element until an extrusion groove is matched with the hollow cylinder to realize a rapid extrusion forming process, driving the piston rod to move downwards, returning the lower chassis and the lower stamping die to an original position, driving the extrusion block to move upwards along a movable rod A, driving a movable rod B and an ejector rod to move upwards by the piston rod to eject a metal module formed in the hollow cylinder out to separate the metal module from the hollow cylinder, and returning the elastic supporting element under the action of the elastic force of a pressure spring, the extrusion is fast to contact with the bottom surface of the rectangular groove of the lower stamping die, so that the metal powder is repeatedly loaded for the next time in a limiting manner, and the feeding precision of the metal is accurately and quickly controlled, and the forming process of the metal powder is realized.

An automatic feeding and forming device for metal powder metallurgy, which comprises a frame, a crushing mechanism, a feeding mechanism, a weighing mechanism and a limiting material leaking mechanism;

the grinding mechanism comprises a metal powder feeding bin with a feeding port at the top and a grinding mechanism arranged in the metal powder feeding bin, the grinding mechanism comprises a driving shaft and a turntable A arranged on the driving shaft, a plurality of through holes are uniformly formed in the turntable A, a vertical rod A and a vertical rod B are arranged on the bottom surface of the turntable A, a plurality of grinding discs are respectively arranged on the vertical rod A and the vertical rod B at equal intervals, a grinding track matched with the grinding discs is arranged on the inner wall of the metal powder feeding bin, and the top end of the driving shaft is coaxial with a motor output shaft positioned above the metal powder feeding bin;

the feeding mechanism comprises a leakage pipe, one end of the leakage pipe is communicated with the bottom of the metal powder feeding bin, the other end of the leakage pipe is connected with the metal powder feeding bin, a rotating shaft with the periphery connected with a helical blade is arranged in the metal powder feeding bin, the feeding end part of the metal powder feeding bin is provided with a speed reducing motor A connected with one end of the rotating shaft, and a material guide pipe is arranged at the discharge port of the metal powder feeding bin;

the weighing mechanism comprises a weighing base plate, a cushion block, a weighing sensor and a lifting cylinder, wherein the middle part of the weighing base plate is provided with a material leakage opening;

the limiting material leaking mechanism comprises a shell, a limiting block, a return spring, a driving pull rod and a vertical rod A, wherein the top of the shell is connected with the bottom of the cylinder body of the lifting cylinder, the upper surface and the lower surface of the shell are provided with a feeding hole, the limiting block is arranged in the shell and provided with a limiting hole in the middle, one end of the return spring is connected with one end of the limiting block, one end of the driving pull rod is connected with the other end of the limiting block, the top of, the bottom of the vertical rod A is fixedly connected with one end of a rocking handle A, the other end of the rocking rod A is connected with the top surface of the movable gear through a vertical rod B, the lower end of the rotating shaft at the center of the movable gear is fixedly connected with one end of a rocking handle B, the other end of the rocking handle B is connected with an output shaft of a speed reducing motor B, the speed reducing motor B is fixed on the base, a fixed ring is arranged on the base, and tooth grooves meshed with the movable gear are continuously arranged on the inner side surface of the fixed ring;

the molding mechanism comprises a support frame, a hydraulic cylinder fixed on the support frame, a lower punching die mechanism connected to the top end of a piston rod of the hydraulic cylinder, a fixed die arranged on the support frame and positioned above the lower punching die mechanism, and a metal powder injection mechanism arranged above the fixed die;

set up the guide block on the base, the notch has been seted up on the guide block, accommodate in the notch drive pull rod.

And the output shaft of the speed reducing motor B is positioned at the center of the fixed circular ring.

And the material leakage pipe is provided with an air cylinder A and an air cylinder B for conveying metal powder.

The other end of the return spring is connected to the inner side surface of one end of the shell.

The lower stamping die mechanism comprises a lower chassis, a lower stamping die and a lower stamping die, wherein the middle part of the lower chassis is provided with a piston rod, the lower stamping die is arranged on the upper surface of the lower chassis, and the lower section of the lower stamping die is provided with a rectangular groove for accommodating an elastic supporting element; the elastic support element comprises an extrusion block arranged on the top end of the piston rod, an ejector rod arranged in the middle of the extrusion block is located on two sides of the ejector rod and connected with a moving rod A and a moving rod B which are extruded fast, pressure springs are circumferentially arranged on the moving rod A and the moving rod B, a hollow cylinder is arranged at the center of the top surface of the lower stamping die, the ejector rod is arranged in the hollow cylinder, and a through hole A which penetrates through the moving rod A and the moving rod B respectively is further formed in the lower stamping die. The top surface of the fixed die is connected with an upper chassis arranged on the support frame, the center of the upper section of the fixed die is provided with a metal powder leaking channel, and the lower section of the fixed die is provided with an extrusion groove communicated with the metal powder leaking channel and matched with the hollow cylinder.

The limiting hole is equal to the diameter of the feed opening.

The casing is the cuboid of cavity form, the stopper be with casing matched with rectangular block.

The motor is arranged at the top of the metal powder feeding bin.

The other end of the rocker A is connected to the top surface of the movable gear through a vertical rod B and is located on the outer side of the rotating shaft.

The material leakage opening is communicated with the material guide pipe, and a blanking pipe communicated with the blanking opening is connected below the material leakage opening.

The metal powder injection mechanism comprises a hollow cylindrical injector, a reset spring and a fixed bin, wherein the top of the hollow cylindrical injector is communicated with the blanking pipe, the reset spring is arranged on the periphery of the hollow cylindrical injector, the fixed bin is used for accommodating the hollow cylindrical injector, an opening A communicated with the metal powder leakage channel is formed in the bottom of the fixed bin, and the outer diameter of the reset spring is larger than the diameter of an opening B in the top of the fixed bin.

The working process of the invention during use is as follows: starting a motor, driving a driving shaft to rotate rapidly by the motor, pouring metal powder into a metal powder feeding bin from a feeding material, sequentially passing through a through hole of a turntable A of a grinding mechanism, leaking the fed metal powder into a grinding track to be ground by a grinding disc, conveying the ground metal powder into a metal powder feeding bin of a feeding mechanism through a material leaking pipe, conveying gas into a material leaking pipe by a cylinder A and a cylinder B, starting a speed reducing motor A, quickly conveying the ground metal powder in the material leaking pipe into the metal powder feeding bin under the action of gas pressure, conveying the fed metal powder into a discharging pipe in the middle of a weighing backing plate of the weighing mechanism through a material guide pipe under the conveying of a spiral blade, when determining that the weight of the fed metal powder reaches the weight set by a standard of metal forming through a retransmission sensor, starting the speed reducing motor B, and moving a movable gear moves along the inner side face of a fixed ring, simultaneously, a limiting block at the end part of the driving pull rod is driven to move towards the base along the shell, when a discharging hole is opposite to a limiting hole, the fed metal powder in a discharging pipe leaks, the fed metal powder in the discharging pipe completely falls into a hollow cylindrical injector in a fixed bin, the metal powder in the hollow cylindrical injector is injected into a hollow cylinder through a metal powder leaking channel arranged at the center of the upper section of a fixed die under the action of the elastic restoring force of a reset spring, a switch of a hydraulic cylinder is opened, the hydraulic cylinder drives a piston rod to move upwards, a lower chassis and a lower stamping die are separated from a supporting frame, simultaneously the piston rod drives an extrusion block to move upwards, the extrusion block and an elastic supporting element drive the lower stamping die to move upwards until an extrusion groove is matched with the hollow cylinder, the rapid extrusion forming process is realized, and the piston rod moves downwards, the lower chassis and the lower stamping die return to the original position together, the piston rod moves upwards again at the moment to drive the extrusion block to move along the moving rod A, the moving rod B and the ejector rod move upwards to eject the formed metal module in the hollow cylinder to separate the metal module from the hollow cylinder, and under the action of the elastic force of the pressure spring, the elastic supporting element returns, namely, the extrusion is fast contacted with the bottom surface of the rectangular groove of the lower stamping die, so that the metal powder is loaded for the next time in a limiting manner, and the feeding precision of metal is accurately and quickly controlled, and the forming process of the metal powder is realized.

The invention has the beneficial effects that: the metal powder feeding device is used for rapidly and automatically controlling the whole process of metal powder feeding in powder metallurgy, the grinding mechanism is arranged to grind the metal powder on the primary side again, the metal powder is conveyed to the weighing mechanism through the feeding mechanism to be metered, the feeding precision is controlled, the limiting and leaking mechanism limits whether the weight of the metal powder reaches a weight value set by a standard or not according to the weighing mechanism, the metal powder loss is avoided, efficient operation can be realized, the labor cost is reduced, and the use requirement of accurate metal powder feeding is met; the feeding and weighing devices are independent devices, so that the vibration generated by the feeding and feeding mechanism does not influence the weighing precision of the weighing mechanism; the limiting and leaking mechanism ensures high stability of the movement of the driving pull rod through the meshing of the moving gear and the tooth socket, the return spring realizes the reciprocating movement of the limiting block, the degree of automation is high, the metal powder with qualified weight is automatically discharged, the metal powder is automatically leaked into a hollow cylindrical injector needing to be injected and discharged according to the requirement of metering and time, the fixed die and a lower stamping die of the lower stamping die mechanism are mutually extruded to quickly form the metal powder, the arrangement of the elastic supporting element realizes that a formed metal block is ejected out of a hollow cylinder, and the hydraulic cylinder enables the stamping die to reach preset pressure and extrusion speed in a short time, so that the metal powder qualified through metering is conveniently and continuously formed, and the limiting and leaking mechanism is suitable for batch production.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a polishing mechanism according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a weighing mechanism in an embodiment of the invention.

Fig. 5 is a schematic structural diagram of a material leakage limiting mechanism in the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a shell removal limiting mechanism in the embodiment of the invention.

Fig. 7 is a schematic structural view of a position relationship between a moving gear and a driving pull rod in the material leakage limiting mechanism according to the embodiment of the invention.

Fig. 8 is a schematic structural diagram of a molding mechanism in an embodiment of the present invention.

FIG. 9 is a schematic structural diagram illustrating a positional relationship between a lower punch mechanism and a fixed die in a molding mechanism according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a fixed mold in the molding mechanism according to the embodiment of the present invention.

FIG. 11 is a schematic structural diagram illustrating a positional relationship between a lower punch mechanism and a fixed die in a molding mechanism according to an embodiment of the present invention.

Fig. 12 is a schematic structural view of a positional relationship between a hollow cylindrical syringe and a return spring in the metal powder injection mechanism according to the embodiment of the present invention.

Wherein the reference numerals are: 1. a frame; 2. a crushing mechanism; 211. a feeding port; 21. a metal powder feeding bin; 22. a drive shaft; 23. a turntable A; 25. Erecting a rod A; 26. a vertical rod B; 27. a grinding disc; 28. grinding the rail; 29. a motor; 3. a feeding mechanism; 31. a material leaking pipe; 32. a metal powder feeding bin; 33. a helical blade; 34. a rotating shaft; 35. a reduction motor A; 36. a material guide pipe; 311. a cylinder A; 312. a cylinder B; 4. a weighing mechanism; 41. a material leakage port; 42. weighing a base plate; 43. cushion blocks; 44. a weighing sensor; 45. a lifting cylinder; 5. a limiting material leaking mechanism; 511. a feeding port; 51. a housing; 521. a limiting hole; 52. a limiting block; 53. a return spring; 54. driving the pull rod; 55. a vertical rod A; 56. a rocking handle A; 57. a vertical rod B; 58. a moving gear; 59. a rotating shaft; 60. a rocking handle B; 61. a reduction motor B; 62. a base; 63. fixing the circular ring; 64. a tooth socket; 65. a guide block; 66. a notch; 67. a discharging pipe; 6. a molding mechanism; 68. a support frame; 6-1, a hydraulic cylinder; 69. fixing the mold; 70. a piston rod; 71. a metal powder injection mechanism; 72. a lower chassis; 73. a lower stamping die; 74. an elastic support member; 75. a rectangular groove; 741. extruding the block; 7411. a top rod; 742. a travel bar A; 743. a travel bar B; 76. a pressure spring; 77. a hollow cylinder; 78. a through hole A; 79. an upper chassis; 80. a metal powder leakage passage; 81. extruding a groove; 82. a hollow cylindrical syringe; 83. a return spring; 84. and (5) fixing the bin.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Example 1

Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12, the present invention is: an automatic feeding and forming device for metal powder metallurgy comprises a frame 1, a crushing mechanism 2, a feeding mechanism 3, a weighing mechanism 4 and a limiting material leaking mechanism 5;

the crushing mechanism 2 comprises a metal powder feeding bin 21 with a feeding port 211 arranged at the top, and a grinding mechanism arranged in the metal powder feeding bin 21, wherein the grinding mechanism comprises a driving shaft 22, a turntable A23 arranged on the driving shaft 22, a plurality of through holes are uniformly formed in the turntable A23, a vertical rod A25 and a vertical rod B26 are arranged on the bottom surface of a turntable A23, a plurality of grinding discs 27 are respectively arranged on the vertical rod A25 and the vertical rod B26 at equal intervals, a grinding track 28 matched with the grinding discs 27 is arranged on the inner wall of the metal powder feeding bin 21, and the top end of the driving shaft 22 is coaxial with an output shaft of a motor 29 positioned above the metal powder feeding bin 21;

the feeding mechanism 3 comprises a leakage pipe 31 with one end communicated with the bottom of the metal powder feeding bin 21, the other end of the leakage pipe 31 is connected with the metal powder feeding bin 32, a rotating shaft 34 with the periphery connected with a helical blade 33 is arranged in the metal powder feeding bin 32, the rotating shaft is arranged at the feeding end part of the metal powder feeding bin 32 and is provided with a speed reducing motor A35 connected with one end of the rotating shaft 34, and a material guide pipe 36 is arranged at the discharge port of the metal powder feeding bin 32;

the weighing mechanism 4 comprises a weighing base plate 42, a cushion block 43, a weighing sensor 44 and a lifting cylinder 45, wherein the middle part of the weighing base plate 42 is provided with a material leakage opening 41, the cushion block 43 is positioned on the bottom surface of the weighing base plate 42, the weighing sensor 44 is fixedly arranged on the cushion block 43, and the lifting cylinder 45 is positioned on the outer side of the material leakage opening 41;

the limiting material leaking mechanism 5 comprises a shell 51, the top of the shell is connected with the bottom of a cylinder body of a lifting cylinder 45, a feeding port 511 is arranged above and below the shell 51, a limiting block 52 with a limiting hole 521 arranged in the middle is arranged in the shell 51, a return spring 53 with one end connected with one end of the limiting block 52, a driving pull rod 54 with one end connected with the other end of the limiting block 52, the top of a vertical rod A55 connected with the other end of the driving pull rod 54, the bottom of the vertical rod A55 is fixedly connected with one end of a rocking handle A56, the other end of a rocking rod A56 is connected with the top surface of a movable gear 58 through a vertical rod B57, the lower end of a rotating shaft 59 at the center of the movable gear 58 is fixedly connected with one end of a rocking handle B60, the other end, a fixed ring 63 is arranged on the base 62, and a tooth socket 64 meshed with the moving gear 58 is continuously arranged on the inner side surface of the fixed ring 63;

the molding mechanism 6 includes a support frame 68, a hydraulic cylinder 6-1 fixed to the support frame 68, a lower die mechanism attached to the top end of a piston rod 70 of the hydraulic cylinder 6-1, a fixed die 69 provided on the support frame 68 above the lower die mechanism, and a metal powder injection mechanism 71 disposed above the fixed die 69.

A guide block 65 is disposed on the base 62, and a notch 66 is disposed on the guide block 65, and the drive rod 54 is received in the notch 66.

The output shaft of the reduction motor B61 is located at the center of the fixed ring 63.

The blowby pipe 31 is provided with a cylinder a311 and a cylinder B312 for conveying the metal powder.

The other end of the return spring 53 is connected to an inner surface of one end of the housing 51.

The lower punching die mechanism comprises a lower chassis 72, the middle part of which is provided with a piston rod 70, a lower punching die 73 arranged on the upper surface of the lower chassis 72, and a rectangular groove 75 for accommodating an elastic supporting element 74 is arranged on the lower section of the lower punching die 73; the elastic supporting member 74 includes a pressing block 741 connected to the top end of the piston rod 70, a push rod 7411 disposed in the middle of the pressing block 741, a moving rod a742 and a moving rod B743 which are disposed on both sides of the push rod 7411 and connected to the pressing block 741, a compression spring 76 disposed around the moving rod a742 and the moving rod B743, a hollow cylinder 77 disposed at the center of the top surface of the lower punch die 73, a push rod 7411 disposed in the hollow cylinder 77, and a through hole a78 respectively passing through the moving rod a742 and the moving rod B743 provided on the lower punch die 73.

The top surface of the fixed die 69 is connected to an upper base plate 79 arranged on the support frame 68, a metal powder leaking passage 80 is arranged at the center of the upper section of the fixed die, and an extrusion groove 81 which is communicated with the metal powder leaking passage 80 and is matched with the hollow cylinder 77 is arranged at the lower section of the fixed die.

The diameter of the limiting hole 521 is equal to that of the feed opening 511.

The housing 51 is a hollow rectangular body, and the stopper 52 is a rectangular block fitted to the housing 51.

The motor 29 is provided on the top of the metal powder feeding bin 21.

The other end of rocker a56 is connected to the top surface of moving gear 58 through vertical bar B57, outside rotating shaft 59.

The material leakage port 41 is communicated with the material guide pipe 36, and a material discharge pipe 67 communicated with the material discharge port 511 is connected below the material leakage port 41.

The metal powder injection mechanism 71 comprises a hollow cylindrical injector 82 with the top communicated with the blanking pipe 67, a return spring 83 arranged on the periphery of the hollow cylindrical injector 82, a fixed bin 84 for accommodating the hollow cylindrical injector 82, an opening A communicated with the metal powder leakage channel 80 is arranged at the bottom of the fixed bin 84, and the outer diameter of the return spring 83 is larger than the diameter of an opening B at the top of the fixed bin 84.

When the metal powder feeding device is used, the motor 29 is started, the motor 29 drives the driving shaft 22 to rotate rapidly, metal powder is poured into the metal powder feeding bin 21 from the feeding port 211, the metal powder sequentially passes through the through hole of the turntable A23 of the grinding mechanism, the fed metal powder is leaked into the grinding track 28 and is ground by the grinding disc 27, the ground metal powder is conveyed into the metal powder feeding bin 32 of the feeding mechanism 3 through the material leakage pipe 31, the air cylinder A311 and the air cylinder B312 convey air into the material leakage pipe 31, the speed reduction motor A35 is started, the metal powder ground in the material leakage pipe 31 is quickly conveyed into the metal powder feeding bin 32 under the action of air pressure, the fed metal powder is conveyed into the discharging pipe 67 in the middle of the weighing cushion plate 42 of the weighing mechanism 4 through the material guide pipe 36 under the conveying of the spiral blade 33, and when the weight of the fed metal powder reaches the weight set by the standard of metal forming through the retransmission sensor 44, the speed reducing motor B61 is started, the moving gear 58 moves along the inner side of the fixed ring 63, and at the same time, the limiting block 52 at the end of the driving pull rod 54 is driven to move along the housing 51 towards the base 62, when the blanking opening 511 is opposite to the limiting hole 521, the feeding metal powder in the blanking tube 67 leaks, the feeding metal powder in the blanking tube 67 falls completely into the hollow cylindrical injector 82 in the fixed bin 84, the metal powder in the hollow cylindrical injector 82 is injected into the hollow cylinder 77 through the metal powder leaking channel 80 arranged at the center of the upper section of the fixed die 69 under the action of the elastic restoring force of the return spring 83, the switch of the hydraulic cylinder 6-1 is started, at this time, the hydraulic cylinder 6-1 drives the piston rod 70 to move upwards, the lower chassis 72 and the lower stamping die 73 are separated from the support frame 68, the piston rod 70 drives the extrusion block 741 to move upwards, the extrusion block 741 and the elastic support element 74 drive the lower stamping die 73 to move upwards together, until the extrusion groove 81 is matched with the hollow cylinder 77, a rapid extrusion forming process is realized, the piston rod 70 moves downwards, the lower chassis 72 and the lower stamping die 73 return to the original position together, at the moment, the piston rod 70 moves upwards again to drive the extrusion block 741 to move upwards along the moving rod A742, the moving rod B743 and the ejector rod 7411, the metal module formed in the hollow cylinder 77 is ejected out to be separated from the hollow cylinder 77, the elastic supporting element 74 returns under the action of the elastic force of the pressure spring 76, namely, the extrusion block 741 is in contact with the bottom surface of the rectangular groove 75 of the lower stamping die 73, and the next metal powder feeding limiting is repeated, so that the metal feeding precision is accurately and rapidly controlled, and the metal powder forming process is controlled.

The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also belong to the present invention.

Claims

1. A molding device is characterized by comprising a molding mechanism, wherein the molding mechanism (6) comprises a support frame (68), a hydraulic cylinder (6-1) fixed on the support frame (68), a lower stamping die mechanism connected to the top end of a piston rod (70) of the hydraulic cylinder (6-1), a fixed die (69) arranged on the support frame (68) and above the lower stamping die mechanism, and a metal powder injection mechanism (71) arranged above the fixed die (69);

the lower stamping die mechanism comprises a lower chassis (72) with the middle part provided with a piston rod (70), a lower stamping die (73) arranged on the upper surface of the lower chassis (72), and a rectangular groove (75) provided with an elastic supporting element (74) at the lower section of the lower stamping die (73); the elastic supporting element (74) comprises an extrusion block (741) connected with the top end of the piston rod (70), a push rod (7411) arranged in the middle of the extrusion block (741), a moving rod A (742) and a moving rod B (743) which are positioned on two sides of the push rod (7411) and connected to the extrusion block (741), a pressure spring (76) is arranged on the moving rod A (742) and the moving rod B (743) in the circumferential direction, a hollow cylinder (77) is arranged at the center of the top surface of the lower stamping die (73), the push rod (7411) is arranged in the hollow cylinder (77), and a through hole A (78) respectively penetrating through the moving rod A (742) and the moving rod B (743) is further arranged on the lower stamping die (73).

2. The molding device as defined in claim 1, wherein the top surface of the fixed mold (69) is connected to an upper base plate (79) provided on the support frame (68), a metal powder leaking passage (80) is provided at the center of the upper section of the fixed mold, and an extrusion groove (81) communicating with the metal powder leaking passage (80) and engaged with the hollow cylinder (77) is provided at the lower section of the fixed mold.

3. The molding apparatus according to claim 2, wherein the metal powder injection mechanism (71) comprises a hollow cylindrical injector (82) having a top portion communicating with the feed pipe (67), a return spring (83) provided at a periphery of the hollow cylindrical injector (82), a fixing chamber (84) accommodating the hollow cylindrical injector (82), an opening A communicating with the metal powder leaking passage (80) is provided at a bottom portion of the fixing chamber (84), and an outer diameter of the return spring (83) is larger than a diameter of the opening B at the top portion of the fixing chamber (84).