Method for applying powder to aluminum nitride green body and apparatus therefor

Abstract

The application provides a powder applying method and device for aluminum nitride green bodies, which comprises a device shell, a bottom box fixedly connected to the bottom of the device shell, and an electric push rod fixedly installed at the bottom of the inside of the bottom box. The powder applying method and device for aluminum nitride green bodies can place the green body on the green body placing structure, and the structure can fix the green body through the pressure of the top of the structure, the size of the green body, and the fixing plate around the green body, so that the activity of the green body is prevented. Meanwhile, a sealed environment is created through green body processing, the powder after the processing of the green body is discharged along the gas track in the environment, the powder is collected, the powder is prevented from being scattered to the outside of the device during the processing, the air pressure of the collecting air bag drives the reset spring to expand, the airflow forms a path, the excess dust is discharged, the spreading area of the dust is reduced, the dust can be collected, cleaning is not needed, and the production cost of the device is reduced.

Description

Technical Field

[0001] This invention relates to the field of molding clay or other ceramic components, specifically to a powder coating method and equipment for aluminum nitride green bodies. Background Technology

[0002] Aluminum nitride substrates are a type of ceramic substrate. They are formed by placing powder in a container and slowly applying pressure using the incompressibility of liquids and their pressure transmission properties to create a dense green body. After the green body is formed, it needs to be coated with anti-adhesion powder to facilitate demolding of the aluminum nitride substrate during the later firing process. However, in the current aluminum nitride substrate powder coating process, special dimensional adjustments are required to fix aluminum nitride substrates of different specifications, which affects the processing efficiency of aluminum nitride substrates in batch processing.

[0003] Regarding the powder coating method and equipment for aluminum nitride green bodies mentioned above, a search revealed a patent (CN201711265175.5) on a powder coating process for ceramic substrate green bodies, comprising the following steps: (1) forming a uniform adhesive film layer on the surface of the ceramic substrate green body to obtain a ceramic substrate green body with an adhesive film layer; (2) forming a separating powder layer on the surface of the ceramic substrate green body with an adhesive film layer to obtain a powder-coated ceramic substrate green body. The powder coating process of the present invention implements the adhesive and separating powder separately in two steps, effectively avoiding the formation of liquid droplets by the adhesive on the surface of the green body under tension, thereby causing the separating powder to agglomerate on the surface of the green body; improving the dispersion uniformity and density uniformity of the separating powder, while the separating powder not coated on the surface of the green body can be directly recycled and reused, significantly improving the utilization rate of the separating powder and reducing the difficulty of recycling the separating powder. The present invention also discloses a powder coating system for ceramic substrate green bodies, which ensures uniform surface powder after the ceramic substrate green body passes through the powder coating system of the present invention. However, during the operation of this aluminum nitride green body powder coating method and equipment, when the anti-adhesion powder suspension is evenly sprayed by compressed air, the ceramic substrate is easily impacted by the air ejection, causing the ceramic substrate to shift. This prevents the powder from being fully and evenly applied to the ceramic substrate. Moreover, since the ceramic substrates have different shapes and sizes, the holding device needs to be adjusted in advance to fix the substrate before fixing it. At the same time, since the powder that has not been coated can be recycled, the small powder particles are not easy to control, and the complete collection of powder is quite difficult. Excess powder is easy to get stuck in the gaps of the equipment structure, so the powder needs to be cleaned later. Summary of the Invention

[0004] The purpose of this invention is to provide a powder coating method and equipment for aluminum nitride green blanks.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a powder coating method and equipment for aluminum nitride green billets, comprising an equipment housing, a bottom box fixedly connected to the bottom of the equipment housing, and an electric push rod fixedly installed inside the bottom of the bottom box.

[0006] As a further aspect of the present invention: a fixed rod is fixedly connected to the middle of the interior of the base box; a mounting plate is fixedly connected to the top of the fixed rod; a pressure plate is movably connected to the top of the mounting plate; a connecting rod is fixedly connected to the bottom of the pressure plate; a sliding rod is fixedly connected to the bottom of the connecting rod; a sliding wheel is movably connected to one end of the sliding rod; a gear is fixedly connected to the other end of the sliding rod; a fixed plate is movably connected to one end of the gear; a rack is fixedly connected to the top of the fixed plate; a slider is fixedly connected to the bottom of the fixed plate; and a slide rail is movably connected to the bottom of the slider.

[0007] As a further aspect of the present invention: a circular through groove is provided on the top of the base box, the fixing rod passes through the middle of the interior of the base box and is connected to the bottom center of the mounting plate, and a sealing ring is provided at the connection position between the fixing rod and the base box.

[0008] As a further aspect of the present invention: the top of the mounting plate is provided with eight grooves, and the pressure plate is embedded in the grooves, with the eight pressure plates arranged radially around the central axis of the mounting plate.

[0009] As a further aspect of the present invention: one end of the connecting rod is inclined to one side, and the connecting rod is connected to the central axis of the sliding rod.

[0010] As a further aspect of the present invention: the slide rail is configured with an arc-shaped strip structure, the central axis of the slide rail is provided with a groove, one end of the fixing plate is inclined upward, and both ends of the slider are embedded in the interior of the slide rail.

[0011] As a further aspect of the present invention: the rack is located at the central axis of the fixed plate, the gear is internally meshed with the rack, and the sliding wheel is slidably connected to the slide groove of the slide rail.

[0012] As a further embodiment of the present invention: a base plate is fixedly connected to the top of the electric push rod, a collecting airbag is fixedly connected to the top of the base plate, a lower magnetic ring is fixedly connected to the top of the collecting airbag, an upper magnetic ring is movably connected to the top of the lower magnetic ring, a sealing barrel is fixedly connected to the top of the upper magnetic ring, a collecting tube is fixedly connected inside the collecting airbag, a side rotating head is fixedly connected to one side of the collecting tube, a one-way plate is movably connected inside the side rotating head, and a folding tube is fixedly connected to the bottom of the side rotating head.

[0013] As a further aspect of the present invention: the base plate is sealed to the collecting airbag, the collecting tube passes through both sides of the collecting airbag, and the connection between the collecting tube and the collecting airbag is sealed.

[0014] As a further embodiment of the present invention: the collecting tube, the side rotating head and the folding tube are connected together, and the top of the one-way plate is connected to the collecting tube by a return spring.

[0015] As a further aspect of the present invention: the collecting airbag is a barrel-shaped multi-layered folded structure, the height of the collecting airbag is adjusted by the folding structure, and the collecting airbag is magnetically attracted by the lower magnetic ring and the upper magnetic ring.

[0016] A method and apparatus for applying powder to aluminum nitride green blanks, comprising the following steps: S01: Mix the anti-sticking powder required for the green body and put it into the powder coating machine, then place the aluminum nitride green body on the mounting plate; S02: The pressure plate presses down parallel to the mounting plate, causing the connecting rod to lift the structure, and the fixing plate is fixed to one end of the green blank; S03: After the green body is fixed, turn on the electric push rod to push the bottom plate upward, and the upper and lower magnetic rings on the collection airbag are magnetically attracted and fixed. S04: The powder coating machine sprays powder onto the surface of the green body, and the electric push rod pushes upward again to collect the air bag and fold it. S05: The powder is discharged from the collecting air bag and discharged from the folded tube into the collecting box at the bottom of the bottom box; S06: Pull the electric push rod downward to disengage the collecting airbag from the sealed barrel, return it to its original position, and remove the green blank. Beneficial effects

[0017] 1. The present invention provides a powder coating method and equipment for aluminum nitride green blanks. By placing the green blank on the structure, the structure can control the size of the green blank through the pressure at the top. The fixing plates around the green blank can fix the green blank in time to prevent the green blank from moving. At the same time, through the green blank processing, a sealed environment is created. The powder after the green blank is processed can be collected through the gas discharge track in the environment to prevent the powder from drifting outside the equipment during processing.

[0018] 2. The present invention provides a powder coating method and equipment for aluminum nitride green blanks. The mounting plate has eight grooves on its top, and pressure plates are embedded in these grooves. The eight pressure plates are arranged radially around the central axis of the mounting plate. The slide rail has an arc-shaped strip structure with a groove along its central axis. One end of the fixing plate is inclined upwards, and both ends of the slider are embedded inside the slide rail. Through the pressure structure, the internal slide rail acts as a track, allowing the fixing plate to move through the relevant structure. This helps push the fixing plate out from around the mounting plate, fixing green blanks of different structural dimensions without requiring personnel to perform structural adjustments, thus increasing processing efficiency.

[0019] 3. The present invention provides a powder coating method and equipment for aluminum nitride green blanks. The collecting airbag is a barrel-shaped multi-layer folded structure. The height of the collecting airbag is adjusted by the folding structure. The collecting airbag is magnetically attracted by the lower and upper magnetic rings. Through the sealed environment formed inside the collecting airbag, the air pressure formed after the airbag is folded pushes the return spring to unfold, so that the airflow can form a path to discharge excess dust, reduce the dust spread area, and collect the dust without cleaning, thereby reducing the production cost of the equipment. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the powder application device of the present invention.

[0021] Figure 2 This is a diagram of the internal structure of the powder application device of the present invention.

[0022] Figure 3 This is a diagram of the overall bottom structure of the mounting plate of the present invention.

[0023] Figure 4 This is a structural diagram of the slide rail of the present invention.

[0024] Figure 5 This is a structural diagram of the pressure plate of the present invention.

[0025] Figure 6 This is a structural diagram of the disassembled airbag of the present invention.

[0026] Figure 7 This is a structural diagram of the top of the air collection bladder of the present invention.

[0027] Figure 8 This is a structural diagram of the collection tube of the present invention.

[0028] Figure 1-81. Equipment casing; 101. Powder applicator; 102. Control panel; 103. Storage box; 2. Base box; 201. Fixing rod; 202. Mounting plate; 203. Pressure plate; 204. Connecting rod; 206. Sliding rod; 207. Sliding wheel; 208. Gear; 209. Slide rail; 210. Fixing plate; 211. Slider; 212. Rack; 3. Electric push rod; 301. Base plate; 302. Collecting air bag; 303. Lower magnetic ring; 304. Collecting tube; 305. Side rotating head; 306. One-way plate; 307. Folding tube; 308. Sealing barrel; 309. Upper magnetic ring. Detailed Implementation

[0029] Please see Figure 1-8 In this embodiment of the invention, Example 1: A powder coating method and equipment for aluminum nitride green billets, comprising an equipment housing 1, a bottom box 2 fixedly connected to the bottom of the equipment housing 1, and an electric push rod 3 fixedly installed inside the bottom of the bottom box 2.

[0030] A fixed rod 201 is fixedly connected to the middle of the interior of the base box 2. A mounting plate 202 is fixedly connected to the top of the fixed rod 201. A pressure plate 203 is movably connected to the top of the mounting plate 202. A connecting rod 204 is fixedly connected to the bottom of the pressure plate 203. A sliding rod 206 is fixedly connected to the bottom of the connecting rod 204. A sliding wheel 207 is movably connected to one end of the sliding rod 206. A gear 208 is fixedly connected to the other end of the sliding rod 206. A fixed plate 210 is movably connected to one end of the gear 208. A rack 212 is fixedly connected to the top of the fixed plate 210. A slider 211 is fixedly connected to the bottom of the fixed plate 210. A slide rail 209 is movably connected to the bottom of the slider 211. A circular through groove is provided on the top of the bottom box 2. The fixing rod 201 passes through the middle of the interior of the bottom box 2 and is connected to the bottom center of the mounting plate 202. A sealing ring is provided at the connection between the fixing rod 201 and the bottom box 2. The top of the mounting plate 202 is provided with eight grooves, and the pressure plate 203 is embedded in the grooves. The eight pressure plates 203 are arranged radially around the central axis of the mounting plate 202. One end of the connecting rod 204 is tilted to one side, and the connecting rod 204 is connected to the central axis of the sliding rod 206; The slide rail 209 has an arc-shaped strip structure. A groove is provided on the central axis of the slide rail 209. One end of the fixing plate 210 is inclined upward, and both ends of the slider 211 are embedded in the interior of the slide rail 209. The rack 212 is located on the central axis of the fixed plate 210, the gear 208 is internally meshed with the rack 212, and the sliding wheel 207 is slidably connected to the slide groove of the slide rail 209. In this process, when the aluminum nitride green billet is placed on the pressure plate 203, the pressure plate 203 moves downward under force, causing the connecting rod 204 to push the sliding rod 206. The gear 208 connected to the sliding rod 206 is engaged in the rack 212. The rack 212 is pushed, causing the fixing plate 210 to slide from the slider 211, causing one end of the fixing plate 210 to tilt up. The sliding wheel 207 moves with the sliding rod 206 inside the sliding rod 206. The fixing plate 210 tilts up according to the placement position of the green billet, thus fixing the green billet around its perimeter.

[0031] Please see Figure 6-8 , Example 2: The difference between Example 2 and Example 1 is that the electric push rod 3 is located on the left and right sides of the fixed rod 201.

[0032] The top of the electric push rod 3 is fixedly connected to a base plate 301. The top of the base plate 301 is fixedly connected to a collecting airbag 302. The top of the collecting airbag 302 is fixedly connected to a lower magnetic ring 303. The top of the lower magnetic ring 303 is movably connected to an upper magnetic ring 309. The top of the upper magnetic ring 309 is fixedly connected to a sealing barrel 308. The inside of the collecting airbag 302 is fixedly connected to a collecting tube 304. One side of the collecting tube 304 is fixedly connected to a side rotating head 305. The inside of the side rotating head 305 is movably connected to a one-way plate 306. The bottom of the side rotating head 305 is fixedly connected to a folding tube 307. The base plate 301 is sealed to the collecting airbag 302, and the collecting pipe 304 passes through both sides of the collecting airbag 302. The connection between the collecting pipe 304 and the collecting airbag 302 is sealed. The collecting tube 304, the side rotating head 305, and the folding tube 307 are connected to each other, and the top of the one-way plate 306 is connected to the collecting tube 304 through a return spring; The collecting airbag 302 has a barrel-shaped multi-layer folded structure. The height of the collecting airbag 302 is adjusted by the folding structure. The collecting airbag 302 is magnetically attracted by the lower magnetic ring 303 and the upper magnetic ring 309. The process involves pushing the electric push rod 3 upwards, causing the base plate 301 to move upwards. This moves the collecting airbag 302 to below the sealed container 308, causing the upper magnetic ring 309 to adhere to the lower magnetic ring 303. After processing, the powder falls into the collecting airbag 302. The electric push rod 3 then pushes upwards again, causing the collecting airbag 302 to fold and narrow, allowing the internal air to be discharged from the collecting tube 304. This causes the powder to pass through the one-way plate 306 from the collecting tube 304 and be discharged into the side rotating head 305. From there, it moves from the folding tube 307 into the collecting box.

[0033] Please see Figure 1-2 , Example 3: The difference between Example 3 and Example 2 is that the interior of the device housing 1 is hollow; A powder applicator 101 is fixedly installed inside the equipment housing 1, an operation panel 102 is movably installed on the outer surface of the equipment housing 1, and a storage box 103 is fixedly connected to one side of the equipment housing 1. The powder applicator 101 is located on the central axis inside the equipment housing. The powder spraying head of the powder applicator 101 extends to the bottom of the equipment housing 1. The powder spraying head of the powder applicator 101 is located on the central axis inside the sealed barrel 308.

[0034] Please see Figure 1-8 , A method and apparatus for applying powder to aluminum nitride green blanks, comprising the following steps: S01: Mix the anti-sticking powder required for the green blank and put it into the powder coating machine 101, then place the aluminum nitride green blank on the mounting plate 202; S02: The pressure plate 203 presses down and is parallel to the mounting plate 202. The pressure plate 203 causes the connecting rod 204 to lift the structure. The fixing plate 210 is fixed to one end of the green blank. S03: After the green body is fixed, turn on the electric push rod 3 to push the bottom plate 301 upward, and the upper magnetic ring 309 and the lower magnetic ring 303 on the collecting air bag 302 are magnetically attracted and fixed. S04: The powder coating machine 101 sprays powder onto the surface of the green blank, and the electric push rod 3 pushes upward again, causing the air collection bag 302 to fold. S05: The powder is discharged from the collecting air bag 302 and discharged from the folded tube 307 into the collecting box at the bottom of the bottom box 2; S06: The electric push rod 3 is pulled down to disengage the collecting air bag 302 from the sealed barrel 308, return it to its original position, and remove the green blank.

[0035] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A powder coating device for aluminum nitride green billets, characterized in that... The device includes a housing (1), and a base box (2) is fixedly connected to the bottom of the housing (1). An electric push rod (3) is fixedly installed inside the bottom of the base box (2). The top of the bottom box (2) is provided with a circular through slot. The bottom box (2) includes: a fixed rod (201), a mounting plate (202), a pressure plate (203), a connecting rod (204), a sliding rod (206), a sliding wheel (207), a gear (208), a slide rail (209), a fixed plate (210), a slider (211), and a rack (212). A fixed rod (201) is fixedly connected to the middle of the interior of the base box (2). A mounting plate (202) is fixedly connected to the top of the fixed rod (201). A pressure plate (203) is movably connected to the top of the mounting plate (202). A connecting rod (204) is fixedly connected to the bottom of the pressure plate (203). A sliding rod (206) is fixedly connected to the bottom of the connecting rod (204). A sliding wheel (207) is movably connected to one end of the sliding rod (206). A gear (208) is fixedly connected to the other end of the sliding rod (206). A fixed plate (210) is movably connected to one end of the gear (208). A rack (212) is fixedly connected to the top of the fixed plate (210). A slider (211) is fixedly connected to the bottom of the fixed plate (210). A slide rail (209) is movably connected to the bottom of the slider (211). The top of the mounting plate (202) is provided with eight grooves, and the pressure plate (203) is embedded in the grooves. The eight pressure plates (203) are arranged radially around the central axis of the mounting plate (202). One end of the connecting rod (204) is tilted to one side, and the connecting rod (204) is connected to the central axis of the sliding rod (206); The slide rail (209) is an arc-shaped strip structure. A groove is provided on the central axis of the slide rail (209). One end of the fixing plate (210) is inclined upward. Both ends of the slider (211) are embedded in the interior of the slide rail (209). The rack (212) is located on the central axis of the fixed plate (210), the gear (208) is internally meshed with the rack (212), and the sliding wheel (207) is slidably connected on the groove of the slide rail (209).

2. The powder coating equipment for aluminum nitride green blanks as described in claim 1, characterized in that: The fixing rod (201) passes through the middle of the interior of the base box (2) and is connected to the bottom center of the mounting plate (202). A sealing ring is provided at the connection between the fixing rod (201) and the base box (2).

3. The powder coating equipment for aluminum nitride green blanks as described in claim 1, characterized in that: The electric push rod (3) is located on the left and right sides of the fixed rod (201); The electric push rod (3) is fixedly connected to a base plate (301) at the top. A collecting airbag (302) is fixedly connected to the top of the base plate (301). A lower magnetic ring (303) is fixedly connected to the top of the collecting airbag (302). An upper magnetic ring (309) is movably connected to the top of the lower magnetic ring (303). A sealing barrel (308) is fixedly connected to the top of the upper magnetic ring (309). A collecting tube (304) is fixedly connected inside the collecting airbag (302). A side rotating head (305) is fixedly connected to one side of the collecting tube (304). A one-way plate (306) is movably connected inside the side rotating head (305). A folding tube (307) is fixedly connected to the bottom of the side rotating head (305).

4. The powder coating equipment for aluminum nitride green blanks as described in claim 3, characterized in that: The base plate (301) is sealed to the collecting airbag (302), the collecting tube (304) passes through both sides of the collecting airbag (302), and the connection between the collecting tube (304) and the collecting airbag (302) is sealed. The collecting tube (304), the side rotating head (305), and the folding tube (307) are connected to each other, and the top of the one-way plate (306) is connected to the collecting tube (304) through a return spring.

5. The powder coating equipment for aluminum nitride green blanks as described in claim 3, characterized in that: The collecting airbag (302) has a barrel-shaped multi-layer folded structure. The height of the collecting airbag (302) is adjusted by the folding structure. The collecting airbag (302) is magnetically attracted by the lower magnetic ring (303) and the upper magnetic ring (309).

6. A method for applying powder to aluminum nitride green blanks using the powder-applying equipment for aluminum nitride green blanks as described in any one of claims 3-5, characterized in that, Includes the following steps: S01: Mix the anti-sticking powder required for the green blank and put it into the powder coating machine (101), and place the aluminum nitride green blank on the mounting plate (202); S02: The pressure plate (203) presses down parallel to the mounting plate (202), and the pressure plate (203) causes the connecting rod (204) to lift the structure, and the fixing plate (210) is fixed to one end of the green blank; S03: After the green body is fixed, turn on the electric push rod (3) to push the bottom plate (301) upward, and collect the lower magnetic ring (303) on the air bag (302) and the upper magnetic ring (309) to be magnetically attracted and fixed. S04: The powder coating machine (101) sprays powder onto the surface of the green body, and the electric push rod (3) pushes upward again to fold the air collection bag (302); S05: The powder is discharged from the collecting airbag (302) and discharged from the folded tube (307) into the collecting box at the bottom of the bottom box (2); S06: The electric push rod (3) is pulled down to make the collecting air bag (302) detach from the sealed barrel (308), return to its original position, and remove the green blank.

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