A metal powder forming die for piston manufacturing

Abstract

The invention relates to the technical field of powder metallurgy, and discloses a metal powder forming mold for piston manufacturing, comprising a blank polishing device, the top bolt of the blank polishing device is connected to a piston blank demoulding device, one side of the piston blank demoulding device is fixedly connected to a piston mother mold device, one side of the piston mother mold device is electrically connected to a heat energy conversion device, the blank polishing device comprises a vertical air cylinder, the top and bottom of the vertical air cylinder are both sleeved with first plungers, one end of two first plungers are welded with connecting fixing plates, the top bolt of one of the connecting fixing plates is connected to an upwardly movable clamping plate, the bottom bolt of one of the connecting fixing plates is connected to a downwardly movable clamping plate, a pipe on one side of the vertical air cylinder is connected to a ventilation pipe, and a pipe at one end of the ventilation pipe is connected to a polishing grinder, so as to solve the problem that the surface of the piston blank is rough and uneven, which affects the surface quality and aesthetics and the polishing is extremely labor-intensive.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy, and more particularly to a metal powder forming die for piston manufacturing. Background Art

[0002] Metal powder forming molds are key equipment in the process technology for forming and sintering metal powder to manufacture metal materials, composite materials and various types of products. In piston manufacturing, metal powder forming molds are widely used. Through the pressing and sintering process of the mold, pistons with complex shapes, precise dimensions and stable performance can be manufactured. In the process of making pistons using metal powder molds, the first is the filling stage, selecting metal powder materials that meet the requirements for making pistons, and evenly loading the metal powder into the female mold cavity of the mold. The second is the pressing stage, starting the press, making the upper mold descend and applying pressure to the powder, and then entering the pressure holding stage. After the pressing is completed, the relative positions of the upper and lower punches of the mold and the female mold cavity remain unchanged, and a certain pressure is continuously applied for a period of time, which helps to ensure the close combination between the powders and allow the air in the blank to have enough time to escape. After the metal powder is fused, diffused and formed into a solid metal block, it is demolded and reset. At this time, the piston blank is initially formed, and then the next round of production is carried out. This manufacturing method has the advantages of high production efficiency, low manufacturing cost and high material utilization.

[0003] Deficiencies of existing technology: However, in actual production applications, the metal powder forming mold for piston manufacturing under the existing technology still has deficiencies. After the metal powder is sintered and demolded to form a piston blank, its surface is rough and uneven, and surface polishing is required to improve its surface quality and aesthetics. The process is cumbersome and extremely labor-intensive. In addition, after sintering heating to melt the metal powder and form a solid metal block to form a piston blank, it is necessary to maintain a certain time to allow the metal powder to fully fuse and diffuse. After the insulation is completed, the metal block is taken out of the mold and cooled. A large amount of heat will be consumed during the insulation and removal and cooling process. This heat is not utilized, resulting in huge energy waste. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a metal powder forming die for piston manufacturing to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a metal powder forming mold for piston manufacturing, comprising a blank polishing device, the top bolt of the blank polishing device is connected to a piston blank demolding device, one side of the piston blank demolding device is fixedly connected to a piston mother mold device, one side of the piston mother mold device is electrically connected to a heat energy conversion device, the blank polishing device comprises a vertical air cylinder, the top and bottom of the vertical air cylinder are both sleeved with a first plunger, one end of the two first plungers are welded with a connecting fixing plate, the top bolt of one of the connecting fixing plates is connected to an upwardly movable clip, the bottom bolt of one of the connecting fixing plates is connected to a downwardly movable clip, a pipe on one side of the vertical air cylinder is connected to a ventilation pipe, and a pipe at one end of the ventilation pipe A polishing abrasive tool is connected, and a piston mother mold device is provided on the inner side of the polishing abrasive tool. The piston mother mold device includes an upper sub-mold, and the bottom of the upper sub-mold is movably connected to the lower sub-mold, and the bottom of the lower sub-mold is sleeved with a piston blank placement turntable, and the bottom of the piston blank placement turntable is fixedly connected to a first motor. The thermal energy conversion device includes a heat-receiving plate, and the front rotating shaft of the heat-receiving plate is connected to the first rotating shaft, and the side of the heat-receiving plate is fixedly connected to a hot air guide shell, one end of the first rotating shaft is fixedly connected to a fan, the back of the heat-receiving plate is electrically connected to a conductor connecting block, the back of the conductor connecting block is electrically connected to a thermoelectric cold end conductor plate, the bottom of the thermoelectric cold end conductor plate is electrically connected to a current wire, and one end of the current wire is electrically connected to the first motor.

[0006] Furthermore, the polishing abrasive tool includes a horizontal air cylinder, both ends of which are sleeved with second plungers, one end of each of the two second plungers is welded with a polishing abrasive sheet, the back of each of the two polishing abrasive sheets is provided with a frosting strip, and a side pipe of the horizontal air cylinder is connected to a ventilation pipe.

[0007] Furthermore, the bottom bolts of the first motor are connected to a mounting base, the side of the upper sub-mold is fixedly connected to four mold fixing rods, and the side of the lower sub-mold is fixedly connected to four mold fixing rods.

[0008] Furthermore, the upper mold includes an upper mold shell, a first spiral coil is provided in the inner cavity of the upper mold shell, the bottom of the upper mold shell is fixedly connected to the mold shell bottom shell, the bottom of one side of the upper mold shell is fixedly connected to an electrical connection head, the bottom of the electrical connection head is electrically connected to a conductive sheet, and there is an electrical connection between the first spiral coil and the electrical connection head.

[0009] Furthermore, the lower sub-mold includes a lower mold shell, a second spiral coil is provided in the inner cavity of the lower mold shell, the top of the lower mold shell is fixedly connected to the mold shell top shell, the top of one side of the lower mold shell is electrically connected to a connecting socket, and the top of the connecting socket is provided with a connecting jack.

[0010] Furthermore, two connecting rods are welded to the bottom of the thermoelectric cold end conductor sheet, and a mounting base is welded to the bottom of the two connecting rods.

[0011] Furthermore, the piston blank demolding device includes a support column, an upper bolt on the front side of the support column is connected to a first rack, an upper movable sleeve on the side of the support column is connected to an upwardly movable clip, two mold fixing rods are fixedly connected to both sides of the upwardly movable clip, a side of the upwardly movable clip is bolted to a second motor, a rotating shaft at one end of the second motor is connected to a first gear, and the first gear is meshed with the support column.

[0012] Furthermore, the lower bolt on the front side of the support column is connected to a second rack, the lower movable sleeve on the side of the support column is connected to a downward movable clip, both sides of the downward movable clip are fixedly connected to two mold fixing rods, one side of the downward movable clip is bolted to a third motor, one end of the third motor is connected to a second gear on the rotating shaft, and the second gear is meshed with the second rack.

[0013] Furthermore, the inner side of the back of the upwardly movable clip is connected to two second rotating shafts, the side surfaces of the second rotating shafts are rotatably sleeved with two pulleys, and a mounting base is welded to the bottom of the support column.

[0014] Furthermore, the inner side of the back of the downwardly movable clip is connected to two second rotating shafts.

[0015] Technical effects and advantages of the present invention:

[0016] 1. The present invention is provided with a blank polishing device, and a polishing grinding wheel is provided on the side of the piston mold. After the metal powder is sintered to form the piston blank, the demolding device moves the two sub-molds upward and downward respectively to demold the piston blank, so that the piston blank is exposed between the polishing grinding wheels. After the blank is cooled, the placement turntable is rotated under the drive of the motor, thereby prompting the blank to rotate. When the blank is demolded, the upward and downward movements of the two sub-molds cause the plunger to move toward both ends in the air cylinder, forming a negative pressure in the air cylinder, which is transmitted to the air cylinder between the polishing grinding wheels through the air pipe. The negative pressure causes the plungers at both ends of the air cylinder between the polishing grinding wheels to move inward, and the plungers at both ends are connected to the two polishing grinding wheels, thereby causing the polishing grinding wheels to approach each other to fit the piston blank and wait for polishing. This process is conducive to solving the problems that the surface of the piston blank formed by metal powder sintering and demolding is rough and uneven, affecting its surface quality and aesthetics, and the additional polishing process is cumbersome and extremely labor-intensive.

[0017] 2. The present invention is provided with a heat energy conversion device. The heat generated by the sintering of metal powder in the mold will be transmitted to the periphery of the mold, and the heat emitted by the piston blank when it is cooled will also be transmitted to the periphery of the mold. When the hot air suddenly comes from the air, it will form wind force, which makes the fan rotate. The rotation of the fan also forms wind force, and more hot air around is sucked into the back space of the fan. The back space of the fan is provided with a thermoelectric device heating plate. The hot air makes the temperature of the heating plate increase. The thermoelectric device converts thermal energy into electrical energy and drives the motor with the converted electrical energy, so that the piston blank is placed on a turntable and rotates to cooperate with the blank polishing device for grinding and polishing. This process is conducive to avoiding the problem that the heat volatilized by sintering metal powder to form a piston blank and taking the piston blank out of the mold and cooling it is not utilized, resulting in huge energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a schematic structural diagram of the blank polishing device of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the polishing abrasive tool of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the piston mother mold device of the present invention;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the upper mold of the present invention;

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the lower mold of the present invention;

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure of the thermal energy conversion device of the present invention;

[0025] Figure 8 It is a front structural schematic diagram of the piston blank demoulding device of the present invention;

[0026] Fig. 9 It is a schematic diagram of the back structure of the piston blank demoulding device of the present invention.

[0027] The accompanying drawings are marked as follows: 1. blank polishing device; 101. vertical air cylinder; 102. first plunger; 103. connecting fixing plate; 104. ventilation duct; 105. polishing abrasive tool; 1051. horizontal air cylinder; 1052. second plunger; 1053. polishing abrasive disc; 1054. frosting strip; 2. piston mother mold device; 201. upper sub-mold; 2011. upper mold shell; 2012. first spiral coil; 2013. bottom shell of mold shell; 2014. power connection head; 2015. conductive sheet; 202. lower sub-mold; 2021. lower mold shell; 2022. second spiral coil; 2023. top shell of mold shell; 2024. connecting socket; 2025. connecting jack; 2 03. Piston blank placing turntable; 204. First motor; 205. Mounting base; 3. Heat energy conversion device; 301. Heat receiving plate; 302. First rotating shaft; 303. Hot air guiding shell; 304. Fan; 305. Conductor connecting block; 306. Thermoelectric cold end conductor plate; 307. Current conductor; 308. Connecting rod; 4. Piston blank demoulding device; 401. Support column; 402. First rack; 403. Move upward clamp; 404. Mold fixing rod; 405. Second motor; 406. First gear; 407. Second rack; 408. Move downward clamp; 409. Third motor; 410. Second gear; 411. Second rotating shaft; 412. Pulley. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The metal powder forming mold for piston manufacturing involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] Reference Figure 1 The present invention provides a metal powder forming mold for piston manufacturing, including a blank polishing device 1, the top of the blank polishing device 1 is bolted to a piston blank demolding device 4, one side of the piston blank demolding device 4 is fixedly connected to a piston mother mold device 2, and one side of the piston mother mold device 2 is electrically connected to a heat energy conversion device 3.

[0030] What needs to be specifically explained in this embodiment is that the blank polishing device 1 is used to grind and polish the side of the newly formed piston blank, the piston mother mold device 2 is a piston mold, which is divided into an upper and lower sub-mold. After the two sub-molds move upward and downward, the blank will be exposed between the blank polishing device 1, and the function of the thermal energy conversion device 3 is to convert thermal energy into electrical energy to provide power for polishing and grinding. The piston blank demolding device 4 is a control device for the upper and lower sub-molds. The specific structure and working principle of the above components will be described in detail later.

[0031] Reference Figure 2 The blank polishing device 1 includes a vertical air cylinder 101, and the top and bottom of the vertical air cylinder 101 are both sleeved with first plungers 102, one end of the two first plungers 102 are welded with connecting fixing plates 103, the top of one connecting fixing plate 103 is bolted to an upward moving clip 403, and the bottom of one connecting fixing plate 103 is bolted to a downward moving clip 408, a side pipe of the vertical air cylinder 101 is connected to a ventilation pipe 104, one end of the ventilation pipe 104 is connected to a polishing grinder 105, and a piston mother mold device 2 is provided on the inner side of the polishing grinder 105.

[0032] What needs to be specifically explained in this embodiment is that when the piston blank is demolded, the upward moving clip 403 moves upward, and the downward moving clip 408 moves downward, so that the two connecting fixing plates 103 move up and down respectively. The connecting fixing plates 103 and the first plungers 102 are welded and fixed, so the two first plungers 102 also move up and down respectively, forming a negative pressure in the vertical air cylinder 101, and the negative pressure is transmitted to the polishing abrasive 105 through the ventilation pipe 104.

[0033] Reference Figure 3 The polishing abrasive tool 105 includes a horizontal air cylinder 1051, both ends of which are sleeved with second plungers 1052, one end of each of the two second plungers 1052 is welded with a polishing abrasive disc 1053, the back of each of the two polishing abrasive discs 1053 is provided with a frosting strip 1054, and a side pipe of the horizontal air cylinder 1051 is connected to a ventilation pipe 104.

[0034] What needs to be specifically explained in this embodiment is that the negative pressure in the ventilation duct 104 draws out the air inside the horizontal air cylinder 1051 and also forms a negative pressure. The pressure of the negative pressure moves the second plunger 1052 toward the inside of the horizontal air cylinder 1051. The second plunger 1052 and the polishing grinding plate 1053 are in a fixed relationship by welding, so the two polishing grinding plates 1053 approach each other until they touch the piston blank.

[0035] Reference Figure 4The piston mother mold device 2 includes an upper mold 201, the bottom of the upper mold 201 is movably connected to the lower mold 202, the bottom of the lower mold 202 is sleeved with a piston blank placement turntable 203, the bottom of the piston blank placement turntable 203 is fixedly connected to a first motor 204, the bottom of the first motor 204 is bolted to a mounting base 205, the side of the upper mold 201 is fixedly connected to four mold fixing rods 404, and the side of the lower mold 202 is fixedly connected to four mold fixing rods 404.

[0036] What needs to be specifically explained in this embodiment is that the movable connection between the upper sub-mold 201 and the lower sub-mold 202 is in a fixed sealed state when they are fitted together, and will be separated during the demoulding stage.

[0037] Reference Figure 5 The upper mold 201 includes an upper mold shell 2011, a first spiral coil 2012 is provided in the inner cavity of the upper mold shell 2011, the bottom of the upper mold shell 2011 is fixedly connected to the mold shell bottom shell 2013, the bottom of one side of the upper mold shell 2011 is fixedly connected to an electrical connector 2014, the bottom of the electrical connector 2014 is electrically connected to a conductive sheet 2015, and there is an electrical connection between the first spiral coil 2012 and the electrical connector 2014.

[0038] What needs to be specifically explained in this embodiment is that the first spiral coil 2012 is an energized spiral coil, which uses the principle of electromagnetic induction to make the metal powder in the upper mold shell 2011 generate eddy currents in the alternating magnetic field and generate heat, thereby realizing induction heating to achieve a sintering effect. The bottom of the mold shell bottom shell 2013 has an annular groove to increase the sealing effect when it is stacked and connected with the lower mold 202, thereby preventing the metal powder from overflowing from the mold through the gap between the upper mold 201 and the lower mold 202 during the pressing stage.

[0039] Reference Figure 6 The lower sub-mold 202 includes a lower mold shell 2021, a second spiral coil 2022 is provided in the inner cavity of the lower mold shell 2021, the top of the lower mold shell 2021 is fixedly connected to a mold shell top shell 2023, the top of one side of the lower mold shell 2021 is electrically connected to a connecting socket 2024, and the top of the connecting socket 2024 is provided with a connecting hole 2025.

[0040] What needs to be specifically explained in this embodiment is that the effect of the second spiral coil 2022 is the same as that of the first spiral coil 2012, there is an electrical connection between the second spiral coil 2022 and the connecting socket 2024, the connecting socket 2025 is provided for connecting the conductive sheet 2015, and the size of the mold shell top shell 2023 is consistent with the size of the groove at the bottom of the mold shell bottom shell 2013.

[0041] Reference Figure 7 The heat energy conversion device 3 includes a heat receiving plate 301, a front rotating shaft of the heat receiving plate 301 is connected to a first rotating shaft 302, a side of the heat receiving plate 301 is fixedly connected to a hot air guide shell 303, one end of the first rotating shaft 302 is fixedly connected to a fan 304, a back side of the heat receiving plate 301 is electrically connected to a conductor connecting block 305, a back side of the conductor connecting block 305 is electrically connected to a thermoelectric cold end conductor plate 306, a bottom of the thermoelectric cold end conductor plate 306 is electrically connected to a current wire 307, one end of the current wire 307 is electrically connected to a first motor 204, two connecting rods 308 are welded to the bottom of the thermoelectric cold end conductor plate 306, and a mounting base 205 is welded to the bottom of the two connecting rods 308.

[0042] What needs to be specifically explained in this embodiment is that when hot air suddenly comes from the air, it will form wind force, which makes the fan 304 rotate. The rotation of the fan 304 also forms wind force, which draws more hot air around into the hot air guide shell 303. A heat receiving plate 301 is provided in the back space of the fan 304. The hot air makes the temperature of the heat receiving plate 301 increase. The thermoelectric device converts thermal energy into electrical energy, and drives the first motor 204 with the converted electrical energy, so that the piston blank is placed on the turntable 203 and rotates to cooperate with the blank polishing device for grinding and polishing. This process is conducive to avoiding the problem that the heat volatilized by sintering metal powder to form a piston blank and the heat volatilized by taking the piston blank out of the mold and cooling it is not utilized, resulting in huge energy waste.

[0043] Reference Figure 8 and Fig. 9The piston blank demoulding device 4 includes a support column 401, the upper part of the front side of the support column 401 is bolted to a first rack 402, the upper part of the side of the support column 401 is movably sleeved with an upwardly movable clamp 403, both sides of the upwardly movable clamp 403 are fixedly connected to two mold fixing rods 404, one side of the upwardly movable clamp 403 is bolted to a second motor 405, one end of the second motor 405 is connected to a first gear 406, the first gear 406 is meshed with the support column 401, the lower part of the front side of the support column 401 is bolted to a second rack 407, the support column 401 A downward movable clip 408 is movably sleeved on the lower part of the side, and two mold fixing rods 404 are fixedly connected to both sides of the downward movable clip 408. A third motor 409 is bolted to one side of the downward movable clip 408, and a second gear 410 is connected to a rotating shaft at one end of the third motor 409. The second gear 410 is meshed with a second rack 407. The inner sides of the backs of the upward movable clip 403 and the downward movable clip 408 are both connected to two second rotating shafts 411, and two pulleys 412 are rotatably sleeved on the sides of the second rotating shaft 411. A mounting base 205 is welded to the bottom of the support column 401.

[0044] What needs to be specifically explained in this embodiment is that the second motor 405 rotates in opposite directions to the third motor 409. The shaft of the second motor 405 rotates clockwise, and the shaft of the third motor 409 rotates counterclockwise, so that the upward moving clip 403 moves upward and the downward moving clip 408 moves downward.

[0045] The working principle of the present invention is as follows: a polishing abrasive tool 105 is provided on the side of the piston mold. When the metal powder is sintered to form a piston blank, the piston blank demoulding device 4 moves the upper sub-mold 201 and the lower sub-mold 202 upward and downward respectively to demould the piston blank, so that the piston blank is exposed between the two grinding strips 1054. After the blank is cooled, the piston blank placement turntable 203 is rotated under the drive of the first motor 204, thereby causing the blank to rotate. When the blank is demoulded, the upward moving clip 403 and the downward moving clip 408 are moved so that the first column 204 is pressed against the piston blank. The plug 102 moves toward both ends in the vertical air cylinder 101, forming a negative pressure in the vertical air cylinder 101, and the negative pressure is transmitted to the horizontal air cylinder 1051 through the ventilation pipe 104. The negative pressure causes the second plunger 1052 to move inward. The second plunger 1052 is connected to two polishing grinding discs 1053, which then bring the polishing grinding discs 1053 close to each other to fit the piston blank and wait for polishing. This process is helpful to solve the problem that the surface of the piston blank formed by metal powder sintering and demolding is rough and uneven, affecting its surface quality and aesthetics, and the additional polishing process is cumbersome and extremely labor-intensive.

[0046] When hot air suddenly comes from the air, it will form wind force, which makes the fan 304 rotate. The rotation of fan 304 also forms wind force, which draws more hot air around into the hot air guide shell 303. A heat receiving plate 301 is provided in the back space of fan 304. The hot air makes the temperature of heat receiving plate 301 increase. The thermoelectric device converts thermal energy into electrical energy, and drives the first motor 204 with the converted electrical energy, so that the piston blank is placed on the turntable 203 and rotates to cooperate with the blank polishing device for grinding and polishing. This process is conducive to avoiding the problem of sintering metal powder to form a piston blank and taking the piston blank out of the mold and cooling it. The volatilized heat is not utilized, resulting in huge energy waste.

[0047] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0048] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0049] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metal powder forming die for piston manufacturing, comprising a blank polishing device (1), characterized in that: The top of the blank polishing device (1) is bolted to a piston blank demoulding device (4), one side of the piston blank demoulding device (4) is fixedly connected to a piston mother mold device (2), one side of the piston mother mold device (2) is electrically connected to a heat energy conversion device (3), the blank polishing device (1) comprises a vertical air cylinder (101), the top and bottom of the vertical air cylinder (101) are both sleeved with first plungers (102), and one end of each of the two first plungers (102) is welded with a connection A fixing plate (103), a top bolt of the connecting fixing plate (103) is connected to an upwardly movable clamping plate (403), a bottom bolt of the connecting fixing plate (103) is connected to a downwardly movable clamping plate (408), a side pipe of the vertical air cylinder (101) is connected to a ventilation pipe (104), one end pipe of the ventilation pipe (104) is connected to a polishing tool (105), a piston mother mold device (2) is provided on the inner side of the polishing tool (105), and the piston mother mold device The device (2) comprises an upper mold (201), the bottom of the upper mold (201) is movably connected to a lower mold (202), the bottom of the lower mold (202) is sleeved with a piston blank placement turntable (203), the bottom of the piston blank placement turntable (203) is fixedly connected to a first motor (204), the heat energy conversion device (3) comprises a heat receiving plate (301), the front rotation axis of the heat receiving plate (301) is connected to the first rotation axis (302), the heat receiving plate (301) A hot air guide shell (303) is fixedly connected to the side of the heat receiving plate (301), a fan (304) is fixedly connected to one end of the first rotating shaft (302), a conductor connection block (305) is electrically connected to the back of the heat receiving plate (301), a thermoelectric cold end conductor plate (306) is electrically connected to the back of the conductor connection block (305), a current conductor (307) is electrically connected to the bottom of the thermoelectric cold end conductor plate (306), and one end of the current conductor (307) is electrically connected to the first motor (204).

2. A metal powder forming die for piston manufacturing according to claim 1, characterized in that: The polishing abrasive tool (105) comprises a horizontal air cylinder (1051), both ends of the horizontal air cylinder (1051) are sleeved with second plungers (1052), one end of two second plungers (1052) are welded with polishing abrasive discs (1053), the backs of the two polishing abrasive discs (1053) are provided with frosting strips (1054), and a side pipe of the horizontal air cylinder (1051) is connected to a ventilation pipe (104).

3. The metal powder forming die for piston manufacturing according to claim 1, characterized in that: The bottom of the first motor (204) is bolted to a mounting base (205), the side of the upper sub-mold (201) is fixedly connected to four mold fixing rods (404), and the side of the lower sub-mold (202) is fixedly connected to four mold fixing rods (404).

4. The metal powder forming die for piston manufacturing according to claim 1, characterized in that: The upper sub-mold (201) comprises an upper mold shell (2011), a first spiral coil (2012) is arranged in the inner cavity of the upper mold shell (2011), the bottom of the upper mold shell (2011) is fixedly connected to the mold shell bottom shell (2013), the bottom of one side of the upper mold shell (2011) is fixedly connected to an electrical connector (2014), the bottom of the electrical connector (2014) is electrically connected to a conductive sheet (2015), and there is an electrical connection between the first spiral coil (2012) and the electrical connector (2014).

5. The metal powder forming die for piston manufacturing according to claim 1, characterized in that: The lower sub-mold (202) comprises a lower mold shell (2021), a second spiral coil (2022) is provided in the inner cavity of the lower mold shell (2021), the top of the lower mold shell (2021) is fixedly connected to a mold shell top shell (2023), the top of one side of the lower mold shell (2021) is electrically connected to a connection socket (2024), and the top of the connection socket (2024) is provided with a connection hole (2025).

6. The metal powder forming die for piston manufacturing according to claim 1, characterized in that: Two connecting rods (308) are welded to the bottom of the thermoelectric cold end conductor sheet (306), and a mounting base (205) is welded to the bottom of the two connecting rods (308).

7. The metal powder forming die for piston manufacturing according to claim 1, characterized in that: The piston blank demoulding device (4) comprises a support column (401), the upper portion of the front side of the support column (401) is bolted to a first rack (402), the upper portion of the side of the support column (401) is movably sleeved with an upwardly movable clamp (403), both sides of the upwardly movable clamp (403) are fixedly connected to two mold fixing rods (404), one side of the upwardly movable clamp (403) is bolted to a second motor (405), one end of the second motor (405) is connected to a first gear (406), and the first gear (406) is meshed with the support column (401).

8. The metal powder forming die for piston manufacturing according to claim 7, characterized in that: The lower part of the front side of the support column (401) is bolted to a second rack (407), the lower part of the side of the support column (401) is movably sleeved with a downwardly movable clip (408), both sides of the downwardly movable clip (408) are fixedly connected to two mold fixing rods (404), one side of the downwardly movable clip (408) is bolted to a third motor (409), one end of the rotating shaft of the third motor (409) is connected to a second gear (410), and the second gear (410) is meshed with the second rack (407).

9. The metal powder forming die for piston manufacturing according to claim 7, characterized in that: The inner side of the back of the upwardly movable clip (403) is connected to two second rotating shafts (411) by rotating shafts, and the side of the second rotating shaft (411) is rotatably sleeved with two pulleys (412), and the bottom of the support column (401) is welded with a mounting base (205).

10. The metal powder forming die for piston manufacturing according to claim 8, characterized in that: The inner side of the back of the downwardly movable clip (408) is connected to two second rotating shafts (411).

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