A pneumatic powder feeding and mixing integrated powder separation device

Abstract

The present invention discloses a pneumatic powder-feeding and uniformly mixing integrated powder-separating device, comprising: a top cover, a powder-mixing chamber, a powder-separating chamber and a bottom cover which are sealed and connected in sequence from top to bottom; a plurality of powder inlet holes are evenly distributed on the top cover, a fan is installed below the top cover, and the fan is embedded in the powder-mixing chamber; the powder-mixing chamber comprises a conical funnel, and the conical funnel is embedded in the powder-separating chamber; a plurality of powder outlet holes are evenly distributed on the bottom cover, a powder-separating cone is installed above the bottom cover, and the powder-separating cone is embedded in the powder-separating chamber; the cone tip of the powder-separating cone is located at the center below the conical funnel, and the cone surface of the powder-separating cone is provided with a plurality of evenly distributed powder-separating holes near the bottom cover, and the plurality of powder-separating holes correspond to the plurality of powder outlet holes one by one. The present invention provides a pneumatic powder-feeding and uniformly mixing integrated powder-separating device, which supplements the gas energy of powder feeding, enhances the stability of the processing technology, and improves the uniformity of powder feeding.

Description

Technical Field

[0001] The invention relates to the technical field of powder flow separation, and in particular to a pneumatic powder conveying and mixing integrated powder separation device. Background Art

[0002] In the field of laser surface modification and additive manufacturing technology, especially in laser cladding and directed energy deposition processes, powder separation devices or powder mixing devices are generally involved. Laser cladding and directed energy deposition processes refer to melting or melting the selected coating material or printing material under the action of a high-energy-density laser focus, thereby adding the material to the surface of the substrate to form a coating or melting and solidifying the material to form a part after stacking. In the laser additive process, the uniformity of powder feeding plays a key role in improving the surface quality after additive and the quality of the bonding layer between the substrate and the powder.

[0003] The existing powder separation device is usually connected to the powder mixing device at one end and the laser processing head at the other end through a pipeline. The powder mixing device is connected to the pipeline of the pneumatic powder feeder. The powder is sequentially transmitted to the powder mixing device, the powder separation device and the laser processing head through the output air pressure of the pneumatic powder feeder. However, due to the long transmission distance, the output air pressure will cause energy loss during powder transmission, and it is impossible to control the powder to reach the same distance each time, resulting in uneven powder feeding, pulsating powder feeding, unstable processing technology, and ultimately poor uniformity of the powder reaching the laser processing head. Summary of the invention

[0004] The present invention provides a pneumatic powder feeding and uniform mixing integrated powder dividing device, which supplements the gas energy of powder feeding, enhances the stability of the processing technology, and improves the uniformity of powder feeding.

[0005] The present invention provides a pneumatic powder feeding and uniform mixing integrated powder separation device, comprising: a top cover, a powder mixing chamber, a powder separation chamber and a bottom cover which are sealed and connected in sequence from top to bottom;

[0006] A plurality of powder inlet holes are evenly distributed on the top cover, a fan is installed below the top cover, and the fan is embedded in the powder mixing chamber;

[0007] The powder mixing chamber includes a conical funnel, and the conical funnel is embedded in the powder separation chamber;

[0008] A plurality of powder outlet holes are evenly distributed on the bottom cover, a powder separation cone is installed above the bottom cover, and the powder separation cone is embedded in the powder separation cavity;

[0009] The cone tip of the powder separation cone is located at the center below the conical funnel, and the cone surface of the powder separation cone is provided with a plurality of evenly distributed powder separation holes near the bottom cover, and the plurality of powder separation holes correspond to the plurality of powder outlet holes one by one.

[0010] Preferably, the powder mixing chamber further comprises a first cylindrical cavity, the first cylindrical cavity is connected above the conical funnel, and the fan is embedded in the first cylindrical cavity.

[0011] Preferably, the powder separation chamber comprises a second cylindrical cavity and a flow guiding cavity, the flow guiding cavity is connected below the second cylindrical cavity, and the diameter of the flow guiding cavity gradually decreases from top to bottom;

[0012] The conical funnel is embedded in the second cylindrical cavity, and the powder separation cone is embedded in the diversion cavity.

[0013] Preferably, the top cover further comprises a motor, and the motor is installed above the top cover;

[0014] An opening is provided in the middle of the top cover, and the shaft of the motor is connected to the fan through the opening.

[0015] Preferably, the top cover further comprises a plurality of air intake quick-connect fittings and a plurality of air intake pipe plugs;

[0016] The multiple air inlet quick-connect connectors are connected to the powder inlet holes in a one-to-one correspondence, and the multiple air inlet pipe plugs are connected to the multiple air inlet quick-connect connectors in a one-to-one correspondence.

[0017] Preferably, the bottom cover further comprises a plurality of outlet quick-connect fittings and a plurality of outlet pipe plugs;

[0018] The multiple air outlet quick-plug connectors are connected to the powder outlet holes in a one-to-one correspondence, and the multiple air outlet pipe plugs are connected to the multiple air outlet quick-plug connectors in a one-to-one correspondence.

[0019] Preferably, the inner surface of the powder mixing chamber is provided with a tooth-shaped structure.

[0020] Preferably, the toothed structure is manufactured by SLM printing and surface polishing post-processing.

[0021] Preferably, the surface roughness of the powder mixing chamber is not greater than 1.6 um, and the surface roughness of the powder separating chamber is not greater than 1.6 um.

[0022] Preferably, the powder separation chamber is made of transparent resin.

[0023] The present invention provides a pneumatic powder feeding and uniform mixing integrated powder separation device, which has the following advantages:

[0024] It comprises: a top cover, a powder mixing chamber, a powder separating chamber and a bottom cover which are sealed and connected in sequence from top to bottom; a plurality of powder inlet holes are evenly distributed on the top cover, a fan is installed below the top cover, and the fan is embedded in the powder mixing chamber; the powder mixing chamber comprises a conical funnel, and the conical funnel is embedded in the powder separating chamber; a plurality of powder outlet holes are evenly distributed on the bottom cover, a powder separating cone is installed above the bottom cover, and the powder separating cone is embedded in the powder separating chamber; the cone tip of the powder separating cone is located at the center position below the conical funnel, and a plurality of powder separating holes are evenly distributed on the cone surface of the powder separating cone near the bottom cover, and the plurality of powder separating holes correspond to the plurality of powder outlet holes one by one.

[0025] Combined with the above structure, powder is fed into the powder mixing chamber by feeding powder into the multiple powder inlet holes on the top cover, and the fan embedded in the powder mixing chamber is started to rotate to form negative pressure to mix the powder evenly, and the mixed powder is output from the conical funnel. The powder flowing out of the conical funnel falls into the cone tip of the powder dividing cone at the center position below the conical funnel, and the powder can fall as evenly as possible on the conical surface of the powder dividing cone in different directions, and is output from the multiple powder dividing holes evenly distributed near the bottom cover on the conical surface. Since the multiple powder dividing holes correspond to the multiple powder outlet holes one by one, the powder is output from the multiple powder outlet holes of the bottom cover one by one.

[0026] The pneumatic powder feeding and uniform mixing integrated powder separation device of the present invention has a compact structure. The negative pressure formed by the rotation of the fan supplements the gas energy of the powder feeding, and the powder is evenly separated by the powder separation cone, thereby improving the uniformity of the powder feeding and separation and enhancing the stability of the processing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 An exploded view of the pneumatic powder-feeding and uniform-mixing integrated powder-separating device according to an embodiment of the present invention;

[0029] Figure 2 It is a front view of the pneumatic powder feeding and uniform mixing integrated powder separation device according to an embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a pneumatic powder-feeding and uniformly mixing integrated powder-separating device according to an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of the top cover according to an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the powder mixing chamber according to an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the powder separation chamber according to an embodiment of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the powder separation cone and the bottom cover according to an embodiment of the present invention;

[0035] In the figure: 1. Motor; 2. Air inlet plug; 3. Air inlet quick connector; 4. Top cover; 41. Powder inlet hole; 42. Opening hole; 5. Fan; 6. Powder mixing chamber; 61. First cylindrical cavity; 62. Conical funnel; 7. Powder separation chamber; 71. Second cylindrical cavity; 72. Diversion cavity; 8. Powder separation cone; 81. Powder separation hole; 9. Air outlet quick connector; 10. Air outlet plug; 11. Bottom cover; 12. Powder outlet hole. DETAILED DESCRIPTION

[0036] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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.

[0037] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0039] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0040] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0041] The Chinese meanings of the English words in this invention are:

[0042] SLM: selective laser melting, selective laser melting.

[0043] Existing powder dividing devices usually use a coaxial annular laser cladding head for cladding additive processing. First, the powder is fed by a pneumatic powder feeder, and then the powder is divided into several portions by a pneumatic powder feeding and dividing device. After the several portions of powder are gathered by the annular cladding head, a powder spot coaxial with the light spot is formed, which is then clad on the substrate after laser processing to form additive processing.

[0044] However, the powder feeding and dividing device adopts a volumetric powder divider, one end face of which is provided with a powder inlet, and the other end face is provided with multiple powder outlets. The additive powder in the chamber of the powder dividing device is pneumatically delivered from the powder outlet. Since the volumetric powder feeder reduces the gas pressure, the force state of the powder changes, and under the influence of gravity, the suspension state changes, forming an uneven atmospheric suspension state, which affects the uniformity of powder feeding and dividing, and further affects the quality of processed additives.

[0045] The existing powder separator also fixes the powder separator on the laser head through a module. When the powder separator is working, the position and deflection angle move with the movement of the laser head. However, the existing powder separator is a hollow structure. When the airflow enters the cavity of the powder separator, the airflow rate slows down due to volume expansion. If the powder separator is not in a vertical state, the metal powder is easily uneven under the influence of gravity. If the powder separator distributes the powder unevenly, the powder will be unevenly distributed when it is transported to the surface of the workpiece. Under the action of the circular laser spot, the width, height, surface quality, etc. of a single channel in different directions will increase, resulting in serious fluctuations after surface cladding, which has a great impact on the dilution rate of the cladding layer, the powder utilization rate, the surface roughness, and the density of the cladding parts. If the above situation is not discovered in time during the processing, it will seriously affect the quality of laser cladding.

[0046] The present invention provides a pneumatic powder feeding and uniform mixing integrated powder dividing device, which supplements the gas energy of powder feeding, enhances the stability of the processing technology, and improves the uniformity of powder feeding.

[0047] See also Figure 1-7 An embodiment of the present invention provides a pneumatic powder feeding and uniform mixing integrated powder separation device, comprising: a top cover 4, a powder mixing chamber 6, a powder separation chamber 7 and a bottom cover 11 which are sealed and connected in sequence from top to bottom;

[0048] A plurality of powder inlet holes 41 are evenly distributed on the top cover 4, and a fan 5 is installed below the top cover 4, and the fan 5 is embedded in the powder mixing chamber 6;

[0049] The powder mixing chamber 6 includes a conical funnel 62, and the conical funnel 62 is embedded in the powder separation chamber 7;

[0050] A plurality of powder outlet holes 12 are evenly distributed on the bottom cover 11, and a powder separation cone 8 is installed above the bottom cover 11, and the powder separation cone 8 is embedded in the powder separation cavity 7;

[0051] The tip of the powder dividing cone 7 is located at the center below the conical funnel 62 . The conical surface of the powder dividing cone 7 is provided with a plurality of evenly distributed powder dividing holes 81 near the bottom cover 11 . The plurality of powder dividing holes 81 correspond to the plurality of powder outlet holes 12 one by one.

[0052] It should be noted that powder is fed into the powder mixing chamber 6 by feeding powder into the multiple powder inlet holes 41 on the top cover 4, and the fan 5 embedded in the powder mixing chamber 6 is started to rotate to form a negative pressure to evenly mix the powder, and the mixed powder is output from the conical funnel 62. The powder flowing out of the conical funnel 62 falls into the cone tip of the powder dividing cone 8 at the center position below the conical funnel 62, and the powder can fall as evenly as possible on the conical surface of the powder dividing cone 8 in different directions, and is output from the multiple powder dividing holes 81 evenly distributed on the conical surface near the bottom cover 11. Since the multiple powder dividing holes 81 correspond to the multiple powder outlet holes 12 one by one, the powder is output from the multiple powder outlet holes 12 of the bottom cover 11 one by one.

[0053] The pneumatic powder feeding and uniform mixing integrated powder separation device of the present invention has a compact structure. The negative pressure formed by the rotation of the fan 5 supplements the gas energy of the powder feeding, and the powder is evenly separated by the powder separation cone 8, thereby improving the uniformity of powder feeding and separation and enhancing the stability of the processing technology.

[0054] The top cover 4, powder mixing chamber 6, powder separation chamber 7 and bottom cover 11 which are sealed and connected in sequence from top to bottom are coaxial, and the sealed connection is specifically a sealed adhesive connection. Compared with the traditional assembly method of bolts and sealing rings, the sealed adhesive connection method has a firm connection, reliable sealing, greatly reduces the size of the device, and improves the integration of the device.

[0055] See also Figure 3 , 5 In a more specific embodiment, the powder mixing chamber 6 further includes a first cylindrical cavity 61 , the first cylindrical cavity 61 is connected above the conical funnel 62 , and the fan 5 is embedded in the first cylindrical cavity 61 .

[0056] It should be noted that the powder mixing chamber 6 is connected to the top cover 4 and the powder separation chamber 7 respectively through the first cylindrical cavity 61 to fix the position of the powder mixing chamber 6, and the fan 5 is embedded in the first cylindrical cavity 61 to mix the powder. The powder can have enough space to mix in the powder mixing chamber 6, which can improve the mixing effect.

[0057] See also Figure 3 , 6 In a more specific embodiment, the powder separation chamber 7 includes a second cylindrical chamber 71 and a flow guiding chamber 72, the flow guiding chamber 72 is connected to the lower part of the second cylindrical chamber 71, and the diameter of the flow guiding chamber 72 gradually decreases from top to bottom;

[0058] The conical funnel 62 is embedded in the second cylindrical cavity 71 , and the powder separation cone 8 is embedded in the flow guiding cavity 72 .

[0059] It should be noted that the second cylindrical cavity 71 facilitates the embedding of the conical funnel 62;

[0060] The powder dividing cone 8 is embedded in the flow guiding cavity 72, and even the flow guiding cavity 72 and the powder dividing cone 8 are connected. There is a powder guiding space between the flow guiding cavity 72 and the powder dividing cone 8. The diameter of the flow guiding cavity 72 gradually decreases from top to bottom, which is conducive to gathering the powder between the flow guiding cavity 72 and the powder dividing cone 8 to the powder dividing hole 81 on the cone surface of the powder dividing cone 8 near the bottom cover 11 for output.

[0061] See also Figure 1 , Figure 4 , in a more specific embodiment, the top cover 4 further includes a motor 1, and the motor 1 is installed above the top cover 4;

[0062] An opening 42 is provided in the middle of the top cover 4 , and the shaft of the motor 1 is connected to the fan 5 through the opening 42 .

[0063] It should be noted that the motor 1 is connected to the external control circuit, and the motor 1 drives the rotation of the fan 5 . The rotation speed of the fan 5 can be adjusted through the shaft of the motor 1 by adjusting the rotation speed of the motor 1 .

[0064] See also Figure 1 , in a more specific embodiment, the top cover 4 further includes a plurality of air intake quick-connect fittings 3 and a plurality of air intake pipe plugs 2;

[0065] The plurality of air inlet quick-connect connectors 3 are connected to the plurality of powder inlet holes 41 in a one-to-one correspondence, and the plurality of air inlet pipe plugs 2 are connected to the plurality of air inlet quick-connect connectors 3 in a one-to-one correspondence.

[0066] It should be noted that the powder inlet 41 is provided with threads, and the threads on the air inlet quick-connect plug 3 cooperate with the threads of the powder inlet 41 to achieve connection;

[0067] The air inlet quick-connect plug 3 is used to connect the pipeline of the pneumatic powder feeder, and the air inlet pipe plug 2 is used to close the air inlet quick-connect connector 3.

[0068] The technicians in this field can choose the number of air inlet pipe plugs 2 to be unplugged according to the powder feeding requirements of the laser processing head, and then connect the corresponding number of pipes of the pneumatic powder feeder to the air inlet quick-plug connectors 3 with the air inlet pipe plugs 2 unplugged, and the conveying air pressure of the pneumatic powder feeder will input the powder in the powder bin into the powder inlet hole 41 of the top cover 4 through the pipe.

[0069] The provision of the fan 5 can enhance the gas energy of the pneumatic powder feeder conveying air pressure, and effectively avoid the situation of uneven powder feeding and pulsating powder feeding.

[0070] The high-speed rotation of the impeller of the fan 5 collides with the powder input from the powder inlet 41, changing the movement direction of the powder so that the powder is evenly distributed in the powder mixing chamber 6, thereby reducing the loss of gas energy;

[0071] After different kinds of powders are input into the powder mixing chamber 6 through different powder inlet holes 41 , the fan 5 can provide powder mixing power, so that the different kinds of powders can be effectively mixed in the powder mixing chamber 6 , and the powder mixing time can also be accelerated.

[0072] See also Figure 1 , in a more specific embodiment, the bottom cover 11 further includes a plurality of outlet quick-connect fittings 9 and a plurality of outlet pipe plugs 10;

[0073] A plurality of air outlet quick-plug connectors 9 are connected to the powder outlet holes 12 in a one-to-one correspondence, and a plurality of air outlet pipe plugs 10 are connected to the plurality of air outlet quick-plug connectors 9 in a one-to-one correspondence.

[0074] It should be noted that the powder outlet hole 12 is provided with threads, and the threads on the air outlet quick-connect plug 9 cooperate with the threads of the powder outlet hole 12 to achieve connection;

[0075] Those skilled in the art can choose the number of outlet pipe plugs 10 to be removed according to the powder output requirement of the laser processing head, and then the corresponding number of pipes of the laser processing head and the outlet quick-connect connectors 9 with the outlet pipe plugs 10 removed can be connected accordingly.

[0076] After finishing the processing of the laser processing head, first turn off the powder feeding switch of the pneumatic powder feeder, and only start the fan 5 to pass gas into the powder mixing chamber 6 for a period of time. After the residual powder in the device is emptied, the fan 5 is stopped for the next processing.

[0077] In a more specific embodiment, the inner surface of the powder mixing chamber 6 is provided with a tooth-shaped structure.

[0078] It should be noted that the tooth-shaped structure can promote the impact and bounce of the powder in the powder mixing chamber 6 , thereby improving the mixing effect of the powder in the powder mixing chamber 6 .

[0079] In a more specific embodiment, the tooth-shaped structure is manufactured by SLM printing and surface polishing post-processing.

[0080] It should be noted that SLM printing and surface polishing post-processing processes can produce richer internal structures and are less difficult to process than subtractive processing.

[0081] In a more specific embodiment, the surface roughness of the powder mixing chamber 6 is not greater than 1.6 um, and the surface roughness of the powder separating chamber 7 is not greater than 1.6 um.

[0082] It should be noted that the surfaces of the powder mixing chamber 6 and the powder separation chamber 7 have good smoothness, with a surface roughness of no more than 1.6 um, which is conducive to the sliding of the powder on the inner wall of the chamber.

[0083] In a more specific embodiment, the powder separation chamber 7 is made of transparent resin.

[0084] It should be noted that the powder separation chamber 7 made of transparent resin can facilitate external observation of the flow state of the powder inside.

[0085] Those skilled in the art may also select a material with good surface wear resistance to make the powder separation chamber 7 according to needs.

[0086] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pneumatic powder feeding and mixing integrated powder separation device, characterized in that: include: A top cover, a powder mixing chamber, a powder separation chamber and a bottom cover which are sealed and connected in sequence from top to bottom; The sealed connection is a sealant connection; a plurality of powder inlet holes are evenly distributed on the top cover, a fan is installed below the top cover, and the fan is embedded in the powder mixing chamber; The powder mixing chamber includes a conical funnel, and the conical funnel is embedded in the powder separation chamber; A plurality of powder outlet holes are evenly distributed on the bottom cover, a powder separation cone is installed above the bottom cover, and the powder separation cone is embedded in the powder separation cavity; The cone tip of the powder separation cone is located at the center below the conical funnel, and a plurality of evenly distributed powder separation holes are provided on the cone surface of the powder separation cone near the bottom cover, and the plurality of powder separation holes correspond to the plurality of powder outlet holes one by one; The inner surface of the powder mixing chamber is provided with a tooth-shaped structure; The toothed structure is manufactured by SLM printing and surface polishing post-processing; The powder mixing chamber further comprises a first cylindrical cavity, the first cylindrical cavity is connected above the conical funnel, and the fan is embedded in the first cylindrical cavity; The powder separation chamber comprises a second cylindrical chamber and a flow guiding chamber, wherein the flow guiding chamber is connected below the second cylindrical chamber, and the diameter of the flow guiding chamber gradually decreases from top to bottom; The conical funnel is embedded in the second cylindrical cavity, and the powder separation cone is embedded in the diversion cavity; The top cover also includes a motor, which is installed above the top cover; An opening is provided in the middle of the top cover, and the shaft of the motor is connected to the fan through the opening.

2. The pneumatic powder feeding and mixing integrated powder separation device according to claim 1 is characterized in that: The top cover also includes a plurality of air intake quick-connect fittings and a plurality of air intake pipe plugs; The multiple air inlet quick-connect connectors are connected to the powder inlet holes in a one-to-one correspondence, and the multiple air inlet pipe plugs are connected to the multiple air inlet quick-connect connectors in a one-to-one correspondence.

3. The pneumatic powder feeding and mixing integrated powder separation device according to claim 1 is characterized in that: The bottom cover also includes a plurality of outlet quick-connect connectors and a plurality of outlet pipe plugs; The multiple air outlet quick-plug connectors are connected to the powder outlet holes in a one-to-one correspondence, and the multiple air outlet pipe plugs are connected to the multiple air outlet quick-plug connectors in a one-to-one correspondence.

4. The pneumatic powder feeding and mixing integrated powder separation device according to claim 1, characterized in that: The surface roughness of the powder mixing chamber is not greater than 1.6 um, and the surface roughness of the powder separation chamber is not greater than 1.6 um.

5. The pneumatic powder feeding and mixing integrated powder separation device according to claim 1, characterized in that: The powder separation chamber is made of transparent resin.

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