Metal powder mixing device

Abstract

The invention relates to the technical field of mixing devices, and discloses a metal powder mixing device, comprising a frame, a mixing barrel rotatably arranged inside the frame, and a driving mechanism arranged on one side of the frame, wherein the driving mechanism is connected with the mixing barrel in a transmission manner to drive the mixing barrel to rotate, and at least one cooling disk is arranged inside the mixing barrel, and a plurality of cooling channels are opened on the cooling disk; the mixing barrel of the invention intermittently rotates so that the metal powder reciprocates through the cooling channel in the cooling disk, thereby cooling the metal powder to prevent the metal powder from oxidizing in a high temperature environment, and the cooling channel is tilted so that the powder can tilt and fall when passing through the cooling channel, so that the powders passing through the plurality of cooling channels can be cross-mixed to improve the mixing efficiency, so that the mixing barrel can achieve a better mixing effect without a high rotation speed, effectively reduces the friction between the powders, reduces the heat generation, and effectively prevents the oxidation of the metal powder.

Description

[0001] The invention relates to the technical field of mixing devices, in particular to a metal powder mixing device. Background Art

[0002] The metal powders required for metal injection molding (MIM) technology are the core raw materials of the process. These powders have fine particle size and large specific surface area, which help to improve the fluidity and molding performance of the powders. Commonly used metal powders include stainless steel, iron, copper, aluminum, titanium and nickel, each of which has different performance characteristics, such as corrosion resistance, high strength and low density. These powders are mixed with binders, injection molded, degreased and sintered to form metal parts with complex shapes, which are widely used in automobiles, medical devices, electronic products and other fields. With the development of materials science, the types and properties of metal powders are constantly expanding, providing more possibilities for the application of MIM technology. In order to ensure the uniformity of the product structure, it is usually necessary to mix various metal powders evenly together through a mixing device before injection molding.

[0003] Chinese patent CN214765083U discloses a metal powder mixing device, which belongs to the field of powder mixing technology, and includes a bracket, a mixing tank, a connecting sleeve and a plurality of mixing rods. The mixing tank is placed on the bracket, a stirring paddle is rotatably arranged in the mixing tank, and a discharge port is provided on the mixing tank. The connecting sleeve is arranged on the top of the mixing tank and is connected to the mixing tank, and a feed port is provided on the connecting sleeve. A plurality of mixing rods are connected to the inner wall of the connecting sleeve, two adjacent mixing rods are arranged at an angle, and a plurality of leakage holes arranged in an alternating manner are formed between the plurality of mixing rods. The metal powder mixing device provided by the scheme realizes double mixing of metal powder with the help of a plurality of mixing rods and stirring paddles, has a simple structure, and has a good mixing effect.

[0004] Chinese patent CN211329162U discloses a metal powder mixing system, which includes a double cone mixer barrel, a flameless explosion relief device, a power mechanism, a dust removal unit and a protective gas tank. The double cone mixer barrel is provided with a barrel support shaft. One end of the barrel support shaft is connected to the power mechanism through a transmission structure. The flameless explosion relief device is arranged at the upper end of the double cone mixer barrel and is connected to the explosion relief port arranged at the top of the double cone mixer barrel. The dust removal unit is connected to the dust suction port arranged at the top of the double cone mixer barrel through a pipeline. The protective gas tank is connected to the side of the double cone mixer barrel through a pipeline. The system has a simple structure, low cost investment, convenient operation, high production efficiency, high safety, and is also easy to promote, and the economic benefits generated are obvious.

[0005] As shown in the above two patents, the existing metal powder mixing equipment mainly adopts two methods to achieve uniform mixing of powders. One is to mechanically stir the powder in the container by a stirrer, and the other is to rotate the container itself and use centrifugal force and gravity to make the powder flow in the container to achieve the purpose of mixing. However, both mixing methods have a common problem: during the mixing process, the temperature of the powder will increase due to the mutual movement between the metal powder particles and the friction with the stirrer or the container wall. The increase in temperature not only increases the risk of oxidation of the powder, but may also affect the fluidity and molding properties of the powder, thereby adversely affecting the microstructure and performance of the final product.

[0006] Therefore, it is necessary to provide a metal powder mixing device to solve the above technical problems. Summary of the invention

[0007] The object of the present invention is to provide a metal powder mixing device, which can cool the metal powder and prevent the metal powder from being oxidized in a high temperature environment.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: a metal powder mixing device, comprising a frame, a mixing barrel rotatably arranged inside the frame, and a driving mechanism arranged on one side of the frame, the driving mechanism is transmission-connected to the mixing barrel to drive the mixing barrel to rotate, at least one cooling disk is arranged inside the mixing barrel, a plurality of cooling channels are opened on the cooling disk, the cooling channels are inclined, at least one heat dissipation ring is fixedly mounted on the outer side of the mixing barrel, the heat dissipation ring and the cooling disk are both hollow structures, and the heat dissipation ring and the cooling disk are connected through a connecting channel, the connecting channel runs through the barrel wall of the mixing barrel, and the heat dissipation ring, the cooling disk and the connecting channel are collectively filled with oil.

[0009] The present invention is further configured as follows: heat sinks are provided on both sides of the heat dissipation ring, the straight line where the two heat sinks are located is perpendicular to the straight line where the two connecting channels are located, the heat sink is a hollow structure, and the inner cavity of the heat sink is connected to the inner cavity of the heat dissipation ring, and an adjustment block is slidably provided inside the heat sink, and when the mixing barrel rotates, the adjustment block slides back and forth inside the heat sink under the action of its own gravity.

[0010] The present invention is further configured as follows: tapered portions are provided at both ends of the mixing barrel, a barrel body is fixedly installed at both ends of the mixing barrel, the barrel body is communicated with the tapered portion, a spring is provided in the barrel body, one end of the spring is connected to the end wall of the barrel body, and the other end of the spring is connected to a sliding disk, the sliding disk is slidably matched with the barrel body, and the outer peripheral wall of the sliding disk is in contact with the inner peripheral wall of the barrel body.

[0011] The present invention is further configured as follows: an air pipe is fixedly installed on the end wall of the cylinder, the air pipe is connected to the inner cavity of the cylinder, a blast plate is provided on one side of the heat dissipation ring, the blast plate is connected to the air pipe, a plurality of air holes are opened on the blast plate, and the air holes are arranged toward the outer peripheral wall of the heat dissipation ring.

[0012] The present invention is further configured as follows: a through hole is opened in the middle of the sliding disk, a connecting port is fixedly installed on the end wall of the cylinder, a sealing cover is threadedly installed on the connecting port, and the connecting port is connected to the through hole in the middle of the sliding disk through a telescopic tube.

[0013] The present invention is further configured as follows: the sliding plate is a conical structure, and the middle portion of the sliding plate protrudes toward one side of the telescopic tube.

[0014] The present invention is further configured as follows: connecting shafts are fixedly installed on both sides of the mixing barrel, the two connecting shafts are coaxially arranged, and the two connecting shafts are located in the same horizontal plane, and the mixing barrel is rotatably connected to the frame through the two connecting shafts.

[0015] The present invention is further configured as follows: the driving mechanism includes a motor, a transmission wheel and a transmission belt, the motor is installed on one side of the frame, two transmission wheels are provided, the two transmission wheels are respectively fixedly connected to the output end of the motor and one of the connecting shafts, and the two transmission wheels are connected through a transmission belt.

[0016] The present invention is further configured as follows: a plurality of first heat dissipation fins are disposed on the outer peripheral wall of the heat dissipation ring, and a plurality of second heat dissipation fins are arranged horizontally and parallel to each other.

[0017] The present invention is further configured as follows: a plurality of second heat dissipation fins are disposed on the side wall of the heat dissipation block, and the plurality of second heat dissipation fins are arranged horizontally and parallel to each other.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. The mixing barrel of the present invention rotates intermittently, so that the metal powder reciprocates through the cooling channel in the cooling plate, thereby cooling the metal powder and preventing the metal powder from oxidizing in a high temperature environment. The cooling channel is tilted so that the powder can fall obliquely when passing through the cooling channel, so that the powders passing through multiple cooling channels can be cross-mixed to improve the mixing efficiency, so that the mixing barrel can achieve a better mixing effect without a high rotation speed, effectively reducing the friction between the powders, reducing the heat generation, and effectively avoiding the oxidation of the metal powder. At the same time, during the rotation of the mixing barrel, the heat dissipation ring rotates together with the mixing barrel, so that the heat dissipation ring and the air produce relative motion, and the generated relative airflow can take away the heat on the surface of the heat dissipation ring, thereby improving the heat dissipation efficiency of the heat dissipation ring. No heat dissipation fan is required in conventional use, which plays a role in energy saving.

[0020] 2. In the present invention, when the mixing barrel rotates, the adjustment block slides back and forth inside the heat sink under the action of its own gravity. As the adjustment block moves, the oil on one side of the moving direction of the adjustment block is pushed out of the heat sink, so that the oil inside the heat sink, the heat sink ring, the connecting channel and the cooling plate flows, so that the oil after absorbing heat and heating can be quickly transferred from the inside of the cooling plate to the heat sink ring and the heat sink, thereby further improving the heat dissipation efficiency;

[0021] 3. The present invention arranges the cylinder, spring and sliding plate so that when the metal powder is pressed on the sliding plate, the sliding plate overcomes the elastic force of the spring and moves downward. When the mixing cylinder rotates 180°, the metal powder falls downward. After the sliding plate loses the pressure of the metal powder, it moves toward the mixing cylinder under the elastic force of the spring. On the one hand, it can provide thrust to the metal powder, so that the falling speed of the metal powder is increased, so as to increase the relative speed between the metal powders and improve the mixing efficiency of the metal powder. On the other hand, when the sliding plate moves, the gas at the top of the inner cavity of the mixing cylinder moves downward under the pushing action of the sliding plate, so that an airflow from top to bottom is generated in the mixing cylinder, so that the metal powder can pass through the cooling channel more easily. When the cooling channel is set narrow, the cooling channel can be prevented from being blocked, and a larger number of cooling channels can be set to improve the cooling efficiency.

[0022] 4. In the present invention, when the sliding plate moves toward the end of the cylinder, the gas in the cylinder is squeezed into the gas pipe and then blown out through the air holes on the blast plate. The formed airflow acts on the surface of the heat dissipation ring, taking away the heat dissipated by the heat dissipation ring, thereby further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after removing the frame and the driving mechanism;

[0025] Figure 3 It is a schematic cross-sectional view of the mixing barrel of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the sliding plate and the telescopic tube of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the gas transmission pipe and the blast plate of the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the cooling plate and the heat dissipation ring of the present invention;

[0029] Figure 7 It is a schematic diagram of the main cross-sectional structure of the cooling disk of the present invention;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the connection channel, the heat dissipation ring and the heat dissipation block of the present invention;

[0031] Fig. 9 It is a schematic diagram of the top cross-sectional structure of the connecting channel, the heat dissipation ring and the heat dissipation block of the present invention.

[0032] In the figure: 1, frame; 2, mixing barrel; 201, conical part; 3, cooling plate; 301, cooling channel; 4, heat dissipation ring; 401, first heat dissipation fin; 5, connecting channel; 6, heat dissipation block; 601, second heat dissipation fin; 7, adjustment block; 8, oil; 9, transmission wheel; 10, transmission belt; 11, motor; 12, barrel; 13, sliding plate; 14, spring; 15, air pipe; 16, blast plate; 17, telescopic tube; 18, connection port; 19, cover; 20, connecting shaft. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] See also Figures 1 to 3 , Figure 6 Hehe Figure 7 In an embodiment of the present invention, a metal powder mixing device includes a frame 1, a mixing barrel 2 rotatably arranged inside the frame 1, and a driving mechanism arranged on one side of the frame 1, wherein the driving mechanism is connected to the mixing barrel 2 to drive the mixing barrel 2 to rotate, and at least one cooling disk 3 is arranged inside the mixing barrel 2, and preferably two cooling disks 3 are arranged, and a plurality of cooling channels 301 are opened on the cooling disk 3, and the cooling channels 301 are inclined, and the angle between the cooling channels 301 and the axis of the cooling disk 3 is -40° to 40°, so that when the powder passes through the cooling channel 301, it can fall obliquely, so that the powder passing through the plurality of cooling channels 301 can be cross-mixed, so as to improve Mixing efficiency, and the top opening and bottom opening of the cooling channel 301 are chamfered to facilitate the powder to enter the cooling channel 301, the outer side of the mixing barrel 2 is fixedly sleeved with at least one heat dissipation ring 4, the number of heat dissipation rings 4 is the same as the number of cooling disks 3, the outer peripheral wall of the heat dissipation ring 4 is provided with a plurality of first heat dissipation fins 401, and a plurality of second heat dissipation fins 601 are horizontally arranged and parallel to each other, the heat dissipation ring 4 and the cooling disk 3 are both hollow structures, and the heat dissipation ring 4 and the cooling disk 3 are connected through a connecting channel 5, and the connecting channel 5 runs through the barrel wall of the mixing barrel 2, and the heat dissipation ring 4, the cooling disk 3 and the connecting channel 5 are commonly filled with oil 8, and the oil 8 is heat transfer oil.

[0035] When in use, the powder to be mixed is put into the mixing barrel 2. After the mixing barrel 2 is closed, the mixing barrel 2 is driven to rotate intermittently by the driving mechanism, so that the mixing barrel 2 is stationary for 5S to 10S every time it rotates 180°. The mixing barrel 2 is in an upright state when it is in a stationary state. After rotation, the powder in the mixing barrel 2 is at a higher position in the mixing barrel 2. At this time, the powder naturally falls under the action of its own gravity. After the powder falls onto the cooling plate 3, it falls along the cooling channel 301. Since the temperature in the cooling plate 3 and the cooling channel 301 is relatively low, the powder can release heat for cooling. When the powder passes through the cooling channel 301, it can fall at an angle, so that The powders passing through the multiple cooling channels 301 can be cross-mixed to improve the mixing efficiency, so that the mixing barrel 2 can achieve a better mixing effect without a high rotation speed, effectively reducing the friction between the powders, reducing the heat generation, and effectively avoiding the oxidation of the metal powder. At the same time, during the rotation of the mixing barrel 2, the heat dissipation ring 4 rotates together with the mixing barrel 2, so that the heat dissipation ring 4 and the air produce relative movement. The generated relative airflow can take away the heat on the surface of the heat dissipation ring 4, thereby improving the heat dissipation efficiency of the heat dissipation ring 4. There is no need to equip a heat dissipation fan during normal use, which plays a role in energy saving. When the temperature is high, a fan can also be used to assist in heat dissipation.

[0036] In this embodiment, preferably, connecting shafts 20 are fixedly installed on both sides of the mixing barrel 2, the two connecting shafts 20 are coaxially arranged, and the two connecting shafts 20 are located in the same horizontal plane, and the mixing barrel 2 is rotatably connected to the frame 1 through the two connecting shafts 20; the driving mechanism includes a motor 11, a transmission wheel 9 and a transmission belt 10, the motor 11 is installed on one side of the frame 1, and two transmission wheels 9 are provided, and the two transmission wheels 9 are respectively fixedly connected to the output end of the motor 11 and one of the connecting shafts 20, and the two transmission wheels 9 are connected through the transmission belt 10. The diameter of the transmission wheel 9 connected to the connecting shaft 20 is larger than the diameter of the transmission wheel 9 connected to the motor 11, thereby playing a role in deceleration and increasing the torque. When the output end of the motor 11 rotates, the transmission wheel 9 connected thereto is driven to rotate, thereby driving the other transmission wheel 9 to rotate through the transmission belt 10, and then driving the mixing barrel 2 to rotate through the connecting shaft 20.

[0037] See also Figures 6 to 9In the embodiment of the present invention, heat sinks 6 are provided on both sides of the heat dissipation ring 4, and the straight lines where the two heat dissipation blocks 6 are located are perpendicular to the straight lines where the two connecting channels 5 are located. The heat dissipation block 6 is a hollow structure, and the inner cavity of the heat dissipation block 6 is communicated with the inner cavity of the heat dissipation ring 4. An adjusting block 7 is slidably provided in the heat dissipation block 6. When the mixing barrel 2 rotates, the adjusting block 7 slides back and forth inside the heat dissipation block 6 under the action of its own gravity. As the adjusting block 7 moves, the oil 8 on one side of the moving direction of the adjusting block 7 is pushed out of the heat dissipation block 6, so that the oil 8 inside the heat dissipation block 6, the heat dissipation ring 4, the connecting channel 5 and the cooling plate 3 flows, so that the oil 8 after absorbing heat and heating up can be quickly transferred from the inside of the cooling plate 3 to the heat dissipation ring 4 and the heat dissipation block 6, thereby further improving the heat dissipation efficiency.

[0038] In this embodiment, preferably, a plurality of second heat dissipation fins 601 are provided on the side wall of the heat dissipation block 6 , and the plurality of second heat dissipation fins 601 are arranged horizontally and parallel to each other to improve the heat dissipation efficiency of the heat dissipation block 6 .

[0039] See also Figures 2 to 5 In the embodiment of the present invention, both ends of the mixing barrel 2 are provided with a tapered portion 201, and both ends of the mixing barrel 2 are fixedly installed with a barrel body 12, the barrel body 12 is connected to the tapered portion 201, a spring 14 is provided in the barrel body 12, one end of the spring 14 is connected to the end wall of the barrel body 12, and the other end of the spring 14 is connected to a sliding plate 13, the sliding plate 13 is slidably matched with the barrel body 12, and the outer peripheral wall of the sliding plate 13 is in contact with the inner peripheral wall of the barrel body 12; through the arrangement of the barrel body 12, the spring 14 and the sliding plate 13, when the metal powder is pressed on the sliding plate 13, the sliding plate 13 overcomes the elastic force of the spring 14 and moves downward, and when the mixing barrel 2 rotates 180°, the metal powder falls downward. After the sliding plate 13 loses the pressure of the metal powder, it moves toward the mixing barrel 2 under the elastic force of the spring 14. On the one hand, it can provide thrust to the metal powder, thereby increasing the falling speed of the metal powder, so as to increase the relative speed between the metal powders and improve the mixing efficiency of the metal powder. On the other hand, when the sliding plate 13 moves, the gas at the top of the inner cavity of the mixing barrel 2 moves downward under the pushing action of the sliding plate 13, thereby generating an airflow from top to bottom in the mixing barrel 2, so that the metal powder can pass through the cooling channel 301 more easily, and when the cooling channel 301 is set narrower, it can prevent the cooling channel 301 from being blocked, allowing a larger number of cooling channels 301 to be set to improve the cooling efficiency.

[0040] In the present embodiment, preferably, an air pipe 15 is fixedly installed on the end wall of the cylinder 12. The air pipe 15 is a hard pipe, preferably made of copper. The air pipe 15 is connected to the inner cavity of the cylinder 12. A blast plate 16 is provided on one side of the heat dissipation ring 4. The blast plate 16 is connected to the air pipe 15. A plurality of air holes are provided on the blast plate 16, and the air holes are arranged toward the outer peripheral wall of the heat dissipation ring 4. When the sliding plate 13 moves toward the end of the cylinder 12, the gas in the cylinder 12 is squeezed into the air pipe 15, and then blew out through the air holes on the blast plate 16. The formed airflow acts on the surface of the heat dissipation ring 4, taking away the heat dissipated by the heat dissipation ring 4, thereby further improving the heat dissipation efficiency.

[0041] In this embodiment, preferably, the sliding plate 13 is a conical structure, and the middle part of the sliding plate 13 protrudes toward one side of the telescopic tube 17 to facilitate the output of the material through the through hole on the disc, and a through hole is opened in the middle part of the sliding plate 13, and the end wall of the cylinder body 12 is fixedly installed with a connecting port 18, and a sealing cover 19 is threadedly installed on the connecting port 18. The connecting port 18 is connected to the through hole in the middle part of the sliding plate 13 through the telescopic tube 17. The telescopic tube 17 is a corrugated tube, and other telescopic pipe fittings can also be used; when it is necessary to add material to the mixing barrel 2 or take out the material in the mixing barrel 2, the sealing cover 19 can be unscrewed to allow the material to enter and exit through the through hole on the sliding plate 13 and the telescopic tube 17.

[0042] Working principle: open the cover 19 at the top, put the metal powder to be mixed into the mixing barrel 2 through the connecting port 18 and the telescopic tube 17, and then close the connecting port 18 through the cover 19, and then drive the mixing barrel 2 to rotate intermittently through the driving mechanism, so that the mixing barrel 2 is stationary for 5S to 10S every time it rotates 180°. The mixing barrel 2 is in an upright state when it is in a stationary state. After the rotation, the powder in the mixing barrel 2 is at a higher position in the mixing barrel 2. At this time, the powder naturally falls down under the action of its own gravity. After the powder falls onto the cooling plate 3, it falls down along the cooling channel 301. Since the temperature in the cooling plate 3 and the cooling channel 301 is relatively low, The powder can release heat to cool down. When the powder passes through the cooling channel 301, it can fall down at an angle, so that the powders passing through multiple cooling channels 301 can be cross-mixed to improve the mixing efficiency, so that the mixing barrel 2 does not need a high rotation speed to achieve a good mixing effect, effectively reducing the friction between the powders, reducing the heat generation, and effectively avoiding the oxidation of the metal powder. At the same time, during the rotation of the mixing barrel 2, the heat dissipation ring 4 rotates together with the mixing barrel 2, so that the heat dissipation ring 4 and the air produce relative motion, and the generated relative airflow can take away the heat on the surface of the heat dissipation ring 4, thereby improving the heat dissipation efficiency of the heat dissipation ring 4;

[0043] When the mixing barrel 2 rotates, the adjusting block 7 slides back and forth inside the heat sink 6 under the action of its own gravity. As the adjusting block 7 moves, the oil 8 on one side of the moving direction of the adjusting block 7 is pushed out of the heat sink 6, so that the oil 8 inside the heat sink 6, the heat sink ring 4, the connecting channel 5 and the cooling plate 3 flows, so that the oil 8 after absorbing heat and heating can be quickly transferred from the inside of the cooling plate 3 to the heat sink ring 4 and the heat sink 6, thereby further improving the heat dissipation efficiency;

[0044] When the metal powder is pressed on the sliding plate 13, the sliding plate 13 overcomes the elastic force of the spring 14 and moves downward. When the mixing barrel 2 rotates 180°, the metal powder falls downward. After the sliding plate 13 loses the pressure of the metal powder, it moves toward the mixing barrel 2 under the elastic force of the spring 14. On the one hand, it can provide thrust to the metal powder, thereby increasing the falling speed of the metal powder to increase the relative speed between the metal powders and improve the mixing efficiency of the metal powder. On the other hand, when the sliding plate 13 moves, the gas at the top of the inner cavity of the mixing barrel 2 moves downward under the pushing action of the sliding plate 13, thereby generating an airflow from top to bottom in the mixing barrel 2, so that the metal powder can pass through the cooling channel 301 more easily, and when the cooling channel 301 is set narrower, the cooling channel 301 can be prevented from being blocked.

[0045] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A metal powder mixing device, comprising a frame (1), a mixing drum (2) rotatably arranged inside the frame (1), and a driving mechanism arranged on one side of the frame (1), wherein the driving mechanism is in transmission connection with the mixing drum (2) to drive the mixing drum (2) to rotate, and characterized in that: At least one cooling disk (3) is arranged in the mixing barrel (2), and a plurality of cooling channels (301) are provided on the cooling disk (3). The cooling channels (301) are arranged obliquely. At least one heat dissipation ring (4) is fixedly sleeved on the outer side of the mixing barrel (2). The heat dissipation ring (4) and the cooling disk (3) are both hollow structures, and the heat dissipation ring (4) and the cooling disk (3) are connected through a connecting channel (5). The connecting channel (5) runs through the barrel wall of the mixing barrel (2). The heat dissipation ring (4), the cooling disk (3) and the connecting channel (5) are all filled with oil (8). Heat dissipation blocks (6) are arranged on both sides of the heat dissipation ring (4); the straight line where the two heat dissipation blocks (6) are located is perpendicular to the straight line where the two connecting channels (5) are located; the heat dissipation blocks (6) are hollow structures; the inner cavity of the heat dissipation blocks (6) is connected to the inner cavity of the heat dissipation ring (4); an adjustment block (7) is slidably arranged inside the heat dissipation block (6); when the mixing barrel (2) rotates, the adjustment block (7) slides back and forth inside the heat dissipation block (6) under the action of its own gravity; Both ends of the mixing barrel (2) are provided with a conical portion (201), and both ends of the mixing barrel (2) are fixedly mounted with a barrel body (12), the barrel body (12) is communicated with the conical portion (201), a spring (14) is provided inside the barrel body (12), one end of the spring (14) is connected to the end wall of the barrel body (12), and the other end of the spring (14) is connected to a sliding plate (13), the sliding plate (13) is slidably matched with the barrel body (12), and the outer peripheral wall of the sliding plate (13) is in contact with the inner peripheral wall of the barrel body (12); An air delivery pipe (15) is fixedly mounted on the end wall of the cylinder (12), the air delivery pipe (15) being in communication with the inner cavity of the cylinder (12); an air blast plate (16) is disposed on one side of the heat dissipation ring (4), the air blast plate (16) being in communication with the air delivery pipe (15); a plurality of air holes are formed on the air blast plate (16), the air holes being disposed toward the outer peripheral wall of the heat dissipation ring (4); A through hole is provided in the middle of the sliding plate (13); a connecting port (18) is fixedly mounted on the end wall of the cylinder (12); a sealing cover (19) is threadedly mounted on the connecting port (18); and the connecting port (18) is connected to the through hole in the middle of the sliding plate (13) via a telescopic tube (17); The sliding plate (13) is a conical structure, and the middle portion of the sliding plate (13) protrudes toward one side of the telescopic tube (17).

2. A metal powder mixing device according to claim 1, characterized in that: Connecting shafts (20) are fixedly mounted on both sides of the mixing barrel (2); the two connecting shafts (20) are coaxially arranged and located in the same horizontal plane; the mixing barrel (2) is rotatably connected to the frame (1) via the two connecting shafts (20).

3. A metal powder mixing device according to claim 2, characterized in that: The driving mechanism comprises a motor (11), a transmission wheel (9) and a transmission belt (10); the motor (11) is mounted on one side of the frame (1); two transmission wheels (9) are provided; the two transmission wheels (9) are respectively fixedly connected to the output end of the motor (11) and one of the connecting shafts (20); and the two transmission wheels (9) are connected in transmission via the transmission belt (10).

4. A metal powder mixing device according to claim 1, characterized in that: The outer peripheral wall of the heat dissipation ring (4) is provided with a plurality of first heat dissipation fins (401), and a plurality of second heat dissipation fins (601) are arranged horizontally and parallel to each other.

5. A metal powder mixing device according to claim 1, characterized in that: The side wall of the heat dissipation block (6) is provided with a plurality of second heat dissipation fins (601), and the plurality of second heat dissipation fins (601) are arranged horizontally and parallel to each other.

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