CN118477995A - A powder metallurgy disk automatic sintering device and method - Google Patents

Abstract

The invention relates to the technical field of powder sintering devices and discloses an automatic powder metallurgy disc sintering device and method, wherein the automatic powder metallurgy disc sintering device comprises a supporting frame and a mixing drum, wherein the supporting frame is provided with a plurality of groups, is fixedly arranged around the side wall of the mixing drum, the upper end surface of the mixing drum is fixedly provided with a charging port, the automatic powder metallurgy disc sintering device also comprises a discharge pipe, the automatic powder metallurgy disc sintering device is fixedly arranged on the lower end surface of the mixing drum, the middle part of an inner cavity of the mixing drum is rotatably provided with a transmission column, and the lower end surface of the transmission column is fixedly provided with a cross disc; a stirring mechanism; a liquid injection mechanism; a purifying mechanism. According to the invention, through the arrangement of the purifying mechanism, the catalyst solvent can be added into the mixing cylinder for a plurality of times in batches, and under the cooperation of the stirring mechanism, the catalyst solvent is fully mixed with the powder in the mixing cylinder, so that the smelting efficiency and quality of the powder are improved, and finally, through the arrangement of the purifying mechanism, the adsorption and purification of the waste gas generated during the powder smelting are realized, and the healthy working environment of a worker working area is ensured.

Description

A powder metallurgy disk automatic sintering device and method

Technical Field

The invention relates to the technical field of powder sintering devices, in particular to a powder metallurgy disk automatic sintering device and method.

Background Art

With the rapid development of social economy, powder metallurgy is used more and more. Powder metallurgy is a very useful and commonly used preparation method in parts manufacturing. Powder metallurgy is a process technology for preparing metal or using metal powder as raw material, forming and sintering, to manufacture metal materials, composite materials and various types of products; due to the advantages of powder metallurgy technology, it has become the key to solving new material problems and plays a vital role in the development of new materials.

However, in the prior art, when melting and smelting the powder, there is a lack of components in the smelting tube for stirring and mixing the powder. During the powder melting process, the melting efficiency of each part of the powder in the smelting tube is different, which will lead to poor quality of powder sintering. At the same time, when the powder is sintered, when the powder is melted into liquid, there may be incompletely burned gas and toxic and harmful gas inside, which are directly discharged into the air, which is easy to affect the health of surrounding workers. Therefore, there is an urgent need for a powder metallurgy disk automatic sintering device and method to solve such problems.

Summary of the invention

1. Technical issues to be resolved

The object of the present invention is to provide a powder metallurgy disk automatic sintering device and method to solve the problem mentioned in the above background technology that the existing smelting furnace lacks a mechanism for stirring powder and intercepting and absorbing exhaust gas.

(II) Technical solution

To achieve the above object, the present invention provides the following technical solution: a powder metallurgy disk automatic sintering device, comprising a support frame and a mixing barrel, wherein the support frame is provided with a plurality of groups and is fixedly installed around the side wall of the mixing barrel, and a feeding port is fixedly installed on the upper end surface of the mixing barrel, and further comprising:

A discharge pipe is fixedly mounted on the lower end surface of the mixing cylinder, a transmission column is rotatably mounted in the middle of the inner cavity of the mixing cylinder, and a cross plate is fixedly mounted on the lower end surface of the transmission column;

A stirring mechanism, which is arranged on the upper end surface of the mixing barrel and is used to rotate the transmission column;

A liquid injection mechanism, the liquid injection mechanism is arranged on the front side of the side wall of the mixing cylinder, and the liquid injection mechanism is used to inject a catalytic solvent into the inner cavity of the mixing cylinder;

The purification mechanism is arranged on the upper end surface of the mixing cylinder, and is used to purify the smoke generated when the powder is melted.

Preferably, the stirring mechanism includes a support plate installed on the right side of the upper end surface of the mixing drum, a transmission worm is rotatably installed in the inner cavity of the support plate, a transmission worm wheel is fixedly installed on the upper end surface of the transmission column, the transmission worm is meshingly connected with the transmission worm wheel, and a stirring motor is fixedly installed on the side of the upper end surface of the mixing drum close to the support plate through a frame, and the output shaft end of the stirring motor is fixedly connected to the transmission worm.

Preferably, a stirring rod is fixedly mounted on the outer side of the lower end surface of the cross plate, an electric heater is fixedly mounted on the bottom of the inner wall of the mixing cylinder, and a temperature insulation cavity is opened on the side wall of the mixing cylinder, and the temperature insulation cavity is filled with polyurethane foam material.

Preferably, the injection mechanism includes a pressure accumulation box fixedly mounted on the front side wall of the mixing cylinder, a piston magnetic plate is slidably mounted on the inner cavity of the pressure accumulation box, an injection tube is slidably mounted on the inner cavity of the piston magnetic plate, a return spring is wound around the side wall of the injection tube, and a liquid storage tank is fixedly mounted on the upper end surface of the mixing cylinder.

Preferably, the two ends of the return spring are fixedly connected to the side wall of the piston magnetic plate and the inner wall of the mixing cylinder respectively, the end of the injection tube away from the pressure accumulation box extends into the mixing cylinder, the liquid storage tank is connected to the pressure accumulation box through the liquid inlet pipe, and a magnet is provided at the end of the cross plate, and the opposite magnetic poles of the magnet and the piston magnetic plate are opposite.

Preferably, a liquid inlet hole is opened on the right side of the side wall of the liquid injection tube, a liquid outlet hole is opened on the left side of the side wall of the liquid injection tube, a one-way water valve with its outlet to the inner cavity of the liquid injection tube is opened in the liquid inlet hole, and the inner cavity of the liquid inlet tube is provided with a one-way water valve with its outlet to the inner cavity of the pressure accumulation box.

Preferably, the purification mechanism includes an inflation box fixedly mounted on the upper end surface of the mixing barrel by a bracket rod, a piston plate is slidably mounted in the inner cavity of the inflation box, an extension rod is fixedly mounted on the side wall of the piston plate, a clamping spring is wound around the side wall of the extension rod, and a cam block is fixedly mounted on the side wall end of the transmission worm.

Preferably, the extension rod is slidably connected to the inflation box, the two ends of the clamping spring are respectively fixedly mounted on the side wall of the piston plate and the inner wall of the inflation box, and the extension rod is in contact with the side wall of the cam block.

Preferably, an air inlet pipe is fixedly installed on the lower end surface of the inflation box, and the end of the air inlet pipe extends to the inner cavity of the mixing barrel. The inner cavity of the air inlet pipe is provided with a one-way air valve whose outlet is to the inner cavity of the inflation box. An air outlet frame is also fixedly installed on the side wall of the inflation box, and the inner cavity of the air outlet frame is provided with a one-way air valve whose outlet is to the outside. An activated carbon plate is fixedly installed on the inner cavity of the air outlet frame.

A method for automatic sintering of a powder metallurgy disk comprises the following steps:

Step 1: After the worker adds the powder material into the inner cavity of the mixing barrel from the feeding port, the stirring motor is started. Under the cooperation of the transmission worm and the transmission worm gear, the transmission column can drive the cross plate to rotate, and the stirring rod can be used to fully stir the powder in the mixing barrel;

Step 2: Synchronously start the electric heater to melt the powder in the mixing barrel. When the cross plate rotates, the catalytic solvent in the pressure accumulator box can enter the mixing barrel through the liquid inlet pipe through the setting of the liquid injection mechanism to promote the efficiency and quality of powder melting;

Step 3: While the transmission worm is rotating, the purification mechanism can absorb the waste gas in the inner cavity of the mixing barrel and purify the waste gas, thereby ensuring a healthy working environment for workers.

Compared with the prior art, the present invention has the following beneficial effects:

1. After the worker adds the powder material into the inner cavity of the mixing barrel from the feeding port, the invention starts the stirring motor, and the cross disk is continuously rotated under the cooperation of the transmission worm and the transmission worm wheel. At this time, as the magnet and the piston magnetic plate are continuously approached and moved away, the entire device can realize the function of adding a small amount of catalyst solvent into the mixing barrel multiple times. When the cross disk rotates, the stirring rod fixed on the side wall thereof also rotates, so that the catalyst solvent and the powder material can be fully stirred, the contact area between the catalyst solution and the powder material is increased, and the efficiency and quality of the powder being melted in the mixing barrel are effectively improved.

2. In this invention, when the transmission worm rotates, the cam block fixed at its end also rotates accordingly. The cam block can continuously squeeze the extension rod, so that the piston plate moves back and forth in the inner cavity of the inflation box. As the volume of the cavity on the right side of the inflation box continues to change, the exhaust gas in the mixing cylinder can be absorbed. Through the setting of the activated carbon plate, the exhaust gas absorbed by the inflation box can be purified by several groups of microporous structures in the activated carbon plate, and then fresh gas is discharged through the air outlet frame, ensuring the health of the workers' working environment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG2 is a rear view schematic diagram of the overall structure of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG3 is a schematic diagram of a top view and partial cross-section of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG4 is a schematic diagram of a front cross-sectional structure of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG5 is a top partial cross-sectional schematic diagram of a powder metallurgy disk automatic sintering device and method according to the present invention;

6 is a schematic cross-sectional view of the pressure accumulator box of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG7 is a schematic cross-sectional view of the gas filling box of a powder metallurgy disk automatic sintering device and method according to the present invention;

FIG8 is a schematic cross-sectional view of the gas outlet frame of a powder metallurgy disk automatic sintering device and method according to the present invention.

In the figure: 1. support frame; 11. feeding port; 2. mixing barrel; 21. discharge pipe; 22. temperature insulation chamber; 3. transmission column; 4. cross plate; 41. magnet; 5. stirring mechanism; 51. support plate; 52. transmission worm; 53. transmission worm gear; 54. stirring motor; 55. stirring rod; 56. electric heater; 6. liquid injection mechanism; 61. pressure storage box; 62. piston magnetic plate; 63. liquid injection pipe; 631. liquid inlet hole; 632. liquid outlet hole; 64. reset spring; 65. liquid storage tank; 66. liquid inlet pipe; 7. purification mechanism; 71. support rod; 72. inflation box; 73. piston plate; 74. extension rod; 75. pressing spring; 76. cam block; 77. air inlet pipe; 78. air outlet frame; 781. activated carbon plate.

DETAILED DESCRIPTION

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

Please refer to Figures 1 to 8, the present invention provides a powder metallurgy disk automatic sintering device and method technical solution:

A powder metallurgy disk automatic sintering device includes a support frame 1 and a mixing drum 2. The support frame 1 is provided with a plurality of groups and is fixedly installed around the side wall of the mixing drum 2. A feeding port 11 is fixedly installed on the upper end surface of the mixing drum 2. The device also includes:

The discharge pipe 21 is fixedly mounted on the lower end surface of the mixing cylinder 2. A transmission column 3 is rotatably mounted in the middle of the inner cavity of the mixing cylinder 2. A cross plate 4 is fixedly mounted on the lower end surface of the transmission column 3.

A stirring mechanism 5, which is arranged on the upper end surface of the mixing barrel 2, and is used to rotate the transmission column 3;

A liquid injection mechanism 6, which is disposed on the front side of the side wall of the mixing barrel 2 and is used to inject a catalytic solvent into the inner cavity of the mixing barrel 2;

The purification mechanism 7 is arranged on the upper end surface of the mixing cylinder 2, and is used to purify the fume generated when the powder is melted.

Furthermore, the stirring mechanism 5 includes a support plate 51 installed on the right side of the upper end surface of the mixing drum 2, a transmission worm 52 is rotatably installed in the inner cavity of the support plate 51, a transmission worm wheel 53 is fixedly installed on the upper end surface of the transmission column 3, the transmission worm 52 is meshed and connected with the transmission worm wheel 53, and a stirring motor 54 is fixedly installed on the side of the upper end surface of the mixing drum 2 close to the support plate 51 through a frame, and the output shaft end of the stirring motor 54 is fixedly connected to the transmission worm 52;

A stirring rod 55 is fixedly mounted on the outer side of the lower end surface of the cross plate 4, an electric heater 56 is fixedly mounted on the bottom of the inner wall of the mixing cylinder 2, and a temperature insulation cavity 22 is opened on the side wall of the mixing cylinder 2, and the temperature insulation cavity 22 is filled with polyurethane foam material.

It should be noted that a temperature-isolating chamber 22 is provided on the side wall of the mixing barrel 2, and the temperature-isolating chamber 22 is filled with polyurethane foam material, which can ensure that the temperature of the outer wall of the mixing barrel 2 approaches the room temperature, thereby preventing workers from being scalded by the high temperature inside the mixing barrel 2. By turning on the electric heater 56, the workers can quickly heat the mixing barrel 2 to achieve the function of melting the powder material. After that, the workers can discharge the melted powder material solution through the discharge pipe 21, thereby improving the workers' work efficiency.

Furthermore, the liquid injection mechanism 6 includes a pressure storage box 61 fixedly mounted on the front side wall of the mixing cylinder 2, a piston magnetic plate 62 is slidably mounted in the inner cavity of the pressure storage box 61, a liquid injection tube 63 is slidably mounted in the inner cavity of the piston magnetic plate 62, a return spring 64 is wound around the side wall of the liquid injection tube 63, and a liquid storage tank 65 is fixedly mounted on the upper end surface of the mixing cylinder 2;

The two ends of the return spring 64 are fixedly connected to the side wall of the piston magnetic plate 62 and the inner wall of the mixing cylinder 2 respectively. The end of the injection pipe 63 away from the pressure accumulator box 61 extends into the mixing cylinder 2. The liquid storage tank 65 is connected to the pressure accumulator box 61 through the liquid inlet pipe 66. The end of the cross plate 4 is provided with a magnet 41, and the magnet 41 and the opposite magnetic poles of the piston magnetic plate 62 are opposite.

A liquid inlet hole 631 is provided on the right side of the side wall of the liquid injection tube 63, a liquid outlet hole 632 is provided on the left side of the side wall of the liquid injection tube 63, a one-way water valve with its outlet toward the inner cavity of the liquid injection tube 63 is provided in the liquid inlet hole 631, and a one-way water valve with its outlet toward the inner cavity of the pressure accumulation box 61 is provided in the inner cavity of the liquid inlet tube 66.

It should be noted that after the powder material is added into the inner cavity of the mixing barrel 2 from the feeding port 11, by starting the stirring motor 54, the transmission worm 52 will drive the transmission worm wheel 53 to rotate the transmission column 3. Since the cross disk 4 is fixedly installed on the lower end surface of the transmission column 3, the cross disk 4 can continuously rotate in the inner cavity of the mixing barrel 2 at this time. As the magnet 41 at the end of the cross disk 4 continuously approaches the piston magnetic plate 62, the piston magnetic plate 62 can be squeezed to move toward the front side of the pressure accumulation box 61. As the volume of the cavity on the front side of the pressure accumulation box 61 continues to decrease, the liquid medicine in the cavity on the front side of the pressure accumulation box 61 can enter the inner cavity of the injection tube 63 through the liquid inlet hole 631, and then be discharged from the liquid outlet hole 632 to the mixing barrel 2. In the mixing barrel 2, when the magnet 41 at the end of the cross disk 4 is away from the piston magnetic plate 62, the piston magnetic plate 62 can move backward under the elastic force of the return spring 64. At this time, the volume of the cavity on the front side of the pressure accumulator box 61 continues to increase, and the liquid medicine in the liquid storage tank 65 can enter the pressure accumulator box 61 through the liquid inlet pipe 66 to replenish the liquid medicine. Therefore, through the above, the present device can realize the function of adding a small amount of catalyst solvent to the mixing barrel 2 multiple times, and when the cross disk 4 rotates, the stirring rod 55 fixed on its side wall also rotates, so that the catalyst solvent and the powder material can be fully stirred, which effectively improves the efficiency and quality of the powder being melted in the mixing barrel 2.

Further, the purification mechanism 7 includes an inflatable box 72 fixedly mounted on the upper end surface of the mixing cylinder 2 through a bracket rod 71, a piston plate 73 is slidably mounted in the inner cavity of the inflatable box 72, an extension rod 74 is fixedly mounted on the side wall of the piston plate 73, a tightening spring 75 is wound around the side wall of the extension rod 74, and a cam block 76 is fixedly mounted on the side wall end of the transmission worm 52;

The extension rod 74 is slidably connected to the air charging box 72, and the two ends of the pressing spring 75 are respectively fixedly mounted on the side wall of the piston plate 73 and the inner wall of the air charging box 72, and the extension rod 74 is in contact with the side wall of the cam block 76;

An air inlet pipe 77 is fixedly installed on the lower end surface of the inflation box 72, and the end of the air inlet pipe 77 extends to the inner cavity of the mixing barrel 2. The inner cavity of the air inlet pipe 77 is provided with a one-way air valve whose outlet is to the inner cavity of the inflation box 72. An air outlet frame 78 is also fixedly installed on the side wall of the inflation box 72. The inner cavity of the air outlet frame 78 is provided with a one-way air valve whose outlet is to the outside world. An activated carbon plate 781 is fixedly installed in the inner cavity of the air outlet frame 78.

It should be noted that when the transmission worm 52 rotates, the cam block 76 fixed at its end also rotates. The cam block 76 can continuously squeeze the extension rod 74, so that the piston plate 73 moves back and forth in the inner cavity of the inflation box 72. As the volume of the cavity on the right side of the inflation box 72 continues to change, the exhaust gas in the mixing barrel 2 can be absorbed. Through the setting of the activated carbon plate 781, the exhaust gas absorbed by the inflation box 72 can be purified by several groups of microporous structures in the activated carbon plate 781, and then fresh gas is discharged through the air outlet frame 78, thereby ensuring the health of the workers' working environment.

Working principle:

After the worker adds the powder material into the inner cavity of the mixing barrel 2 from the feeding port 11, the stirring motor 54 is started, and the transmission worm 52 drives the transmission worm wheel 53 to rotate the transmission column 3. Since the cross disk 4 is fixedly installed on the lower end surface of the transmission column 3, the cross disk 4 can continuously rotate in the inner cavity of the mixing barrel 2. As the magnet 41 at the end of the cross disk 4 continuously approaches the piston magnetic plate 62, the piston magnetic plate 62 can be squeezed to move toward the front side of the pressure accumulator box 61. As the volume of the cavity on the front side of the pressure accumulator box 61 continues to decrease, the liquid medicine in the cavity on the front side of the pressure accumulator box 61 can enter the inner cavity of the injection tube 63 through the liquid inlet hole 631, and then be discharged from the liquid outlet hole 632 to the mixing barrel. 2, when the magnet 41 at the end of the cross disk 4 is away from the piston magnetic plate 62, the piston magnetic plate 62 can move backward under the elastic force of the return spring 64, and the volume of the cavity on the front side of the pressure accumulator box 61 is constantly increasing, and the liquid medicine in the liquid storage tank 65 can enter the pressure accumulator box 61 through the liquid inlet pipe 66 to achieve the replenishment of the liquid medicine. Therefore, through the above, the device can achieve the function of adding a small amount of catalyst solvent to the mixing barrel 2 multiple times, and when the cross disk 4 rotates, the stirring rod 55 fixed on its side wall also rotates, so that the catalyst solvent and the powder material can be fully stirred, which effectively improves the efficiency and quality of the powder being melted in the mixing barrel 2;

While mixing the powder material and the catalyst solvent, the worker simultaneously turns on the electric heater 56, which can quickly heat the mixing barrel 2 to achieve the function of melting the powder material. After that, the worker can discharge the melted powder material solution through the discharge pipe 21, thereby improving the worker's work efficiency;

As the transmission worm 52 rotates, the cam block 76 fixed at its end also rotates. The cam block 76 can continuously squeeze the extension rod 74, so that the piston plate 73 moves back and forth in the inner cavity of the inflation box 72. As the volume of the cavity on the right side of the inflation box 72 continues to change, the exhaust gas in the mixing barrel 2 can be absorbed. Through the setting of the activated carbon plate 781, the exhaust gas absorbed by the inflation box 72 can be purified by several groups of microporous structures in the activated carbon plate 781, and then fresh gas is discharged through the air outlet frame 78, thereby ensuring the health of the workers' working environment.

Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims (10)

1. A powder metallurgy disk automatic sintering device, comprising a support frame (1) and a mixing drum (2), wherein the support frame (1) is provided in a plurality of groups and is fixedly mounted on the side wall of the mixing drum (2), and a feeding port (11) is fixedly mounted on the upper end surface of the mixing drum (2), characterized in that it also comprises: A discharge pipe (21) is fixedly mounted on the lower end surface of the mixing cylinder (2); a transmission column (3) is rotatably mounted in the middle of the inner cavity of the mixing cylinder (2); a cross plate (4) is fixedly mounted on the lower end surface of the transmission column (3); A stirring mechanism (5), the stirring mechanism (5) being arranged on the upper end surface of the mixing barrel (2), the stirring mechanism (5) being used to rotate the transmission column (3); a liquid injection mechanism (6), the liquid injection mechanism (6) being arranged on the front side of the side wall of the mixing cylinder (2), the liquid injection mechanism (6) being used to inject a catalytic solvent into the inner cavity of the mixing cylinder (2); A purification mechanism (7), wherein the purification mechanism (7) is arranged on the upper end surface of the mixing cylinder (2), and the purification mechanism (7) is used to purify the smoke generated when the powder is melted. 2. A powder metallurgy disk automatic sintering device according to claim 1, characterized in that: the stirring mechanism (5) includes a support plate (51) installed on the right side of the upper end surface of the mixing barrel (2), a transmission worm (52) is rotatably installed in the inner cavity of the support plate (51), a transmission worm gear (53) is fixedly installed on the upper end surface of the transmission column (3), the transmission worm (52) is meshingly connected with the transmission worm gear (53), and a stirring motor (54) is fixedly installed on the side of the upper end surface of the mixing barrel (2) close to the support plate (51) through a frame, and the output shaft end of the stirring motor (54) is fixedly connected to the transmission worm (52). 3. A powder metallurgy disk automatic sintering device according to claim 2, characterized in that: a stirring rod (55) is fixedly installed on the outer side of the lower end surface of the cross disk (4), an electric heater (56) is fixedly installed on the bottom of the inner wall of the mixing cylinder (2), and a temperature insulation cavity (22) is opened on the side wall of the mixing cylinder (2), and the temperature insulation cavity (22) is filled with polyurethane foam material. 4. A powder metallurgy disk automatic sintering device according to claim 1, characterized in that: the injection mechanism (6) includes a pressure storage box (61) fixedly installed on the front side wall of the mixing cylinder (2), a piston magnetic plate (62) is slidably installed in the inner cavity of the pressure storage box (61), an injection tube (63) is slidably installed in the inner cavity of the piston magnetic plate (62), a return spring (64) is wound around the side wall of the injection tube (63), and a liquid storage tank (65) is fixedly installed on the upper end surface of the mixing cylinder (2). 5. A powder metallurgy disk automatic sintering device according to claim 4, characterized in that: the two ends of the return spring (64) are respectively fixedly connected to the side wall of the piston magnetic plate (62) and the inner wall of the mixing cylinder (2), the end of the injection pipe (63) away from the pressure accumulation box (61) extends into the mixing cylinder (2), the liquid storage tank (65) is connected to the pressure accumulation box (61) through the liquid inlet pipe (66), and a magnet (41) is provided at the end of the cross disk (4), and the opposite magnetic poles of the magnet (41) and the piston magnetic plate (62) are opposite. 6. A powder metallurgy disk automatic sintering device according to claim 5, characterized in that: a liquid inlet hole (631) is provided on the right side of the side wall of the liquid injection pipe (63), a liquid outlet hole (632) is provided on the left side of the side wall of the liquid injection pipe (63), a one-way water valve with an outlet toward the inner cavity of the liquid injection pipe (63) is provided in the liquid inlet hole (631), and a one-way water valve with an outlet toward the inner cavity of the pressure accumulation box (61) is provided in the inner cavity of the liquid inlet pipe (66). 7. A powder metallurgy disk automatic sintering device according to claim 2, characterized in that: the purification mechanism (7) includes an air filling box (72) fixedly mounted on the upper end surface of the mixing barrel (2) through a bracket rod (71), a piston plate (73) is slidably mounted in the inner cavity of the air filling box (72), an extension rod (74) is fixedly mounted on the side wall of the piston plate (73), a clamping spring (75) is wound around the side wall of the extension rod (74), and a cam block (76) is fixedly mounted on the end of the side wall of the transmission worm (52). 8. A powder metallurgy disk automatic sintering device according to claim 7, characterized in that: the extension rod (74) is slidably connected to the inflation box (72), the two ends of the clamping spring (75) are respectively fixedly mounted on the side wall of the piston plate (73) and the inner wall of the inflation box (72), and the extension rod (74) is in contact with the side wall of the cam block (76). 9. A powder metallurgy disk automatic sintering device according to claim 8, characterized in that: an air inlet pipe (77) is fixedly installed on the lower end surface of the inflation box (72), the end of the air inlet pipe (77) extends to the inner cavity of the mixing cylinder (2), the inner cavity of the air inlet pipe (77) is provided with a one-way air valve whose outlet is toward the inner cavity of the inflation box (72), and an air outlet frame (78) is also fixedly installed on the side wall of the inflation box (72), the inner cavity of the air outlet frame (78) is provided with a one-way air valve whose outlet is toward the outside, and the inner cavity of the air outlet frame (78) is fixedly installed with an activated carbon plate (781). 10. A method for automatic sintering of powder metallurgy disks according to any one of claims 1 to 9, characterized in that it comprises the following steps: Step 1: After a worker adds powder material into the inner cavity of the mixing barrel (2) from the feeding port (11), the stirring motor (54) is started to operate. Under the cooperation of the driving worm (52) and the driving worm wheel (53), the driving column (3) can drive the cross plate (4) to rotate, and the stirring rod (55) can be used to fully stir the powder in the mixing barrel (2); Step 2: Synchronously start the electric heater (56) to melt the powder in the mixing barrel (2). When the cross plate (4) rotates, the catalytic solvent in the pressure accumulation box (61) can enter the mixing barrel (2) through the liquid inlet pipe (66) through the setting of the liquid injection mechanism (6), so as to improve the efficiency and quality of powder melting; Step 3: While the transmission worm (52) is rotating, the purification mechanism (7) is arranged to absorb the waste gas in the inner cavity of the mixing barrel (2) and purify the waste gas, thereby ensuring a healthy working environment for the workers.