Preparation method of 3D structure reinforced boron carbide bulletproof plugboard

Abstract

This invention relates to the field of equipment manufacturing technology, specifically to a method for preparing a 3D structured reinforced boron carbide bulletproof insert, comprising the following steps: S1, using titanium or tungsten wire to create a three-dimensional 3D texture; S2, placing the 3D texture in a cold-pressing mold and fixing it, then filling the voids in the texture with spray-granulated ultrafine boron carbide powder using a vibration method; S3, cold-pressing in the cold-pressing mold; S4, hot-pressing and sintering to prepare the 3D structured reinforced boron carbide bulletproof insert. This invention utilizes a lifting structure that uses a hydraulic cylinder to drive a hydraulic telescopic rod to press down the upper mold. During this pressing, a relatively sealed space is formed between the baffle and the lower cold-pressing mold, within which the 3D texture is filled with boron carbide.

Description

Technical Field

[0001] This invention relates to the field of equipment manufacturing technology, specifically to a method for preparing a 3D structure-reinforced boron carbide bulletproof insert. Background Technology

[0002] Boron carbide, also known as black brick, is usually a grayish-black powder. It is one of the three hardest known materials and is used in tank armor, bulletproof vests, and many industrial applications. In nuclear reactors, boron carbide is mainly made into controllable rods, but sometimes it is made into powder to increase the surface area. When boron carbide is in powder form, it can be processed into simple shapes for grinding, polishing, drilling, and polishing of materials such as hard alloys and gemstones. Therefore, it can increase the overall protective coating of additives. When it is made together with other substances, a preparation device is required.

[0003] A search revealed that CN214222058U discloses a slide gate valve for a powder preparation equipment, comprising a wedge-shaped valve plate, a valve body, and an actuator. The lower surface of the wedge-shaped valve plate is a wedge surface, and the wedge-shaped valve plate includes a sealing part and a flow part with a flow port. The flow part is located at the thin end of the wedge-shaped valve plate, and the sealing part is located at the thick end of the wedge-shaped valve plate. The valve body is used to accommodate the wedge-shaped valve plate and has a slope corresponding to the wedge surface within the valve body. It also has a scattered powder collection chamber, which is connected to the discharge end of the valve body. The actuator is connected to the valve body and is connected to the wedge-shaped valve plate. Under the action of the wedge-shaped fit, the wedge-shaped valve plate generates a sealing force several times that of the cylinder thrust, ensuring the valve's sealing performance when closed. The scattered powder collection chamber prevents powder from accumulating in the valve body, and under vacuum conditions, it can carry out any residual powder in the valve body, preventing the valve from jamming. This invention not only has high sealing performance but also good anti-jamming performance, solving the problem of valve application in the field of powder preparation.

[0004] However, when using boron carbide to reinforce the structure of bulletproof inserts, vibration is required to fill the gaps in the object with boron carbide. After filling, the bulletproof inserts should be prepared in a timely manner. Some existing equipment is relatively simple in function, only capable of single operation, which is not conducive to production efficiency. Therefore, we propose a 3D structure-reinforced boron carbide bulletproof insert preparation method. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing a 3D structure-reinforced boron carbide bulletproof insert to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing a 3D structure-reinforced boron carbide bulletproof insert, comprising the following steps:

[0007] S1. Use titanium or tungsten wires to create a three-dimensional 3D texture;

[0008] S2. The 3D texture is placed in a cold pressing mold and fixed, and the spray-granulated boron carbide ultrafine powder is filled into the voids of the texture by vibration.

[0009] S3. Cold pressing in a cold pressing mold;

[0010] S4. Hot pressing and sintering to prepare 3D structure-reinforced boron carbide bulletproof inserts.

[0011] The cold pressing mold includes a box body, a lower cold pressing mold disposed inside the box body, and guide pillars disposed on both sides of the lower cold pressing mold;

[0012] The cold pressing mold has a vibration structure inside, an upper mold is provided above the vibration structure, baffles are provided on both sides of the upper mold, a spray port is provided in the middle of the upper mold, an atomizing nozzle is provided inside the spray port, a connecting pipe is provided at the rear end of the atomizing nozzle, a lifting structure is provided above the upper mold, and a door is provided on the outside of the box.

[0013] Preferably, the vibration structure includes a drive motor, a lead screw, a placement groove, rollers, and springs. Both ends of the placement groove are equipped with drive motors, and the output end of the drive motor is equipped with a lead screw. Several sets of rollers are provided at the connection between the placement groove and the cold pressing mold. Several sets of springs are provided above the rollers. One end of the spring is fixed to the cold pressing mold, and the other end is set on the placement groove.

[0014] Preferably, the lifting structure includes a hydraulic cylinder and a hydraulic telescopic rod, with the hydraulic telescopic rod located below the hydraulic cylinder.

[0015] Preferably, the connection between the guide post and the upper mold is provided with a through hole that matches the guide post.

[0016] Preferably, the interior of the cold-pressing mold is provided with a mold groove, and the connection between the mold groove and the upper mold is provided with a mold groove that matches the mold groove.

[0017] Preferably, the connection between the baffle and the upper mold is provided with a sliding groove, and the baffle and the upper mold are slidably connected through the sliding groove. The inside of the sliding groove is provided with a retaining groove, and the connection between the retaining groove and the baffle is provided with a buckle that matches the retaining groove.

[0018] Preferably, a fixing plate is provided at the connection between the spray nozzle and the atomizing nozzle, and the surface of the fixing plate is provided with mesh.

[0019] Preferably, a limiting post is provided at the connection between the fixing plate and the spray nozzle, and the fixing plate and the spray nozzle form a detachable structure through the limiting post.

[0020] A method for preparing D-structure reinforced boron carbide bulletproof inserts using cold pressing molds includes the following steps:

[0021] Step 1: Open the box door and place the completed 3D structure made of titanium or tungsten wire onto the cold-pressing mold, then close the box door;

[0022] Step 2: The hydraulic cylinder drives the hydraulic telescopic rod, which pushes the upper mold down. During the pressing process, the guide column limits the upper mold. When the upper mold is pressed down to a certain position, the baffles on both sides will form a certain sealing space with the cold-pressed lower mold.

[0023] Step 3: The prepared boron carbide powder can be placed into the structure through the connecting pipe and sprayed onto the structure through the atomizing nozzle. During the spraying process, the vibration structure is turned on, so that the drive motor on one side of the vibration structure drives the lead screw to rotate. While rotating, it drives the cold pressing mold to move. After moving, the drive motor on the other side is controlled to operate again, driving the cold pressing mold to move in the opposite direction. In this way, the cold pressing mold is vibrated.

[0024] Step 4: During the vibration of the cold-pressed mold, the spring groups on both sides of the cold-pressed mold will provide a buffering force to the cold-pressed mold.

[0025] Step 5: The ultrafine boron carbide powder, granulated by spraying, is filled into the gaps between the structure using vibration and atomizing nozzles.

[0026] Step 6: Control the lifting structure to move the upper mold upward, remove the baffle and fixing plate, and place a cover at the spray nozzle to block the spray nozzle;

[0027] Step 7: Control the lifting structure to press down, so that the upper mold and the lower cold pressing mold can cold press the structure and form it.

[0028] As can be seen from the above description, the technical solution described in this application can certainly solve the technical problem that this application aims to address.

[0029] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0030] This invention utilizes a vibration structure to drive a lead screw via a single-sided drive motor. This rotation moves the cold-pressing mold, and after movement, the other drive motor is activated to reverse the direction of the mold. This vibration causes the cold-pressing mold to vibrate. During vibration, springs on both sides of the mold provide cushioning, and rollers allow for smooth movement. The rollers and springs reduce damage to the placement groove.

[0031] The lifting structure of this invention uses a hydraulic cylinder to drive a hydraulic telescopic rod to press down the upper mold. When pressing down, a relatively sealed space is formed between the baffle and the cold-pressed lower mold. In this space, the 3D texture is filled with boron carbide.

[0032] The baffle in this invention forms a sliding structure through a groove, and is fixed by a slot and a buckle, realizing a detachable structure between the baffle and the upper mold, which can complete the cold pressing molding operation after spraying.

[0033] The fixing plate and mesh set in this invention can achieve the spraying effect of the atomizing nozzle. After spraying is completed, the object can be removed and replaced by a detachable structure to block the spray nozzle for cold pressing molding. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the vibration structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the lifting structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the connection between the baffle and the upper mold of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the top of the mold in this invention.

[0039] In the diagram: 1. Box body; 2. Cold pressing mold; 3. Guide column; 4. Vibration structure; 401. Drive motor; 402. Lead screw; 403. Placement slot; 404. Roller; 405. Spring; 5. Upper mold; 6. Baffle; 7. Spray nozzle; 8. Atomizing nozzle; 9. Connecting pipe; 10. Lifting structure; 1001. Hydraulic cylinder; 1002. Hydraulic telescopic rod; 11. Box door; 12. Fixing plate. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] Implementation Case 1

[0042] As attached Figure 1 and Figure 3 As shown, the present invention provides a technical solution: a method for preparing a 3D structure-reinforced boron carbide bulletproof insert, comprising the following steps:

[0043] S1. Use titanium or tungsten wires to create a three-dimensional 3D texture;

[0044] S2. The 3D texture is placed in a cold pressing mold and fixed, and the spray-granulated boron carbide ultrafine powder is filled into the voids of the texture by vibration.

[0045] S3. Cold pressing in a cold pressing mold;

[0046] S4. Hot pressing and sintering to prepare 3D structure-reinforced boron carbide bulletproof inserts.

[0047] The cold pressing forming mold includes a box body 1, a cold pressing lower mold 2 disposed inside the box body 1, and guide pillars 3 disposed on both sides of the cold pressing lower mold 2.

[0048] The cold-pressing mold 2 has a vibration structure 4 inside, an upper mold 5 above the vibration structure 4, baffles 6 on both sides of the upper mold 5, a spray nozzle 7 in the middle of the upper mold 5, an atomizing nozzle 8 inside the spray nozzle 7, a connecting pipe 9 at the rear end of the atomizing nozzle 8, a lifting structure 10 above the upper mold 5, and a door 11 on the outside of the housing 1. The vibration structure 4 includes a drive motor 401, a lead screw 402, a placement groove 403, rollers 404, and springs 405. Drive motors 401 are installed at both ends of the placement groove 403, and a lead screw 402 is installed at the output end of the drive motor 401. Several sets of rollers 404 are installed at the connection between the placement groove 403 and the cold-pressing mold 2. Several sets of springs 405 are installed above the rollers 404. One end of the spring 405 is fixed to the cold-pressing mold 2, and the other end is... On the placement groove 403, the connection between the guide post 3 and the upper mold 5 is provided with a through hole that matches the guide post 3. The interior of the cold pressing mold 2 is provided with a mold groove, and the connection between the mold groove and the upper mold 5 is provided with a mold groove that matches the mold groove. The vibration structure 4 can drive the lead screw 402 to rotate by the rotation of the single-sided drive motor 401. While rotating, it drives the cold pressing mold 2 to move. After moving, it controls the other side drive motor 401 to operate again, driving the cold pressing mold 2 to operate in the opposite direction. In this way, the cold pressing mold 2 vibrates. During the vibration of the cold pressing mold 2, the springs 405 on both sides of the cold pressing mold 2 will provide a buffering force to the cold pressing mold 2. The rollers 404 enable the cold pressing mold 2 to move smoothly during vibration. The rollers 404 and springs 405 reduce the damage to the placement groove 403.

[0049] Example 2

[0050] The solution in Example 1 will be further described below with reference to its specific working method.

[0051] like Figure 1 and Figure 3As shown, in a preferred embodiment, based on the above method, the lifting structure 10 further includes a hydraulic cylinder 1001 and a hydraulic telescopic rod 1002. The hydraulic telescopic rod 1002 is provided below the hydraulic cylinder 1001. The lifting structure 10 uses the hydraulic cylinder 1001 to drive the hydraulic telescopic rod 1002 to press down the upper mold 5. When pressing down, a relatively sealed space is formed between the baffle 6 and the cold pressing lower mold 2. Boron carbide is filled in this space.

[0052] like Figure 1 and Figure 4 As shown, in a preferred embodiment, based on the above method, a sliding groove is provided at the connection between the baffle 6 and the upper mold 5. The baffle 6 and the upper mold 5 are slidably connected through the sliding groove. A retaining groove is provided inside the sliding groove. A buckle matching the retaining groove is provided at the connection between the retaining groove and the baffle 6. The baffle 6 is slidably connected through the sliding groove. The retaining groove and the buckle fix the baffle 6, realizing a detachable structure between the baffle 6 and the upper mold 5. After spraying, the cold pressing molding operation can be completed.

[0053] like Figure 1 and Figure 5 As shown, in a preferred embodiment, based on the above method, a fixing plate 12 is further provided at the connection between the spray nozzle 7 and the atomizing nozzle 8. The surface of the fixing plate 12 is provided with mesh, and a limiting post is provided at the connection between the fixing plate 12 and the spray nozzle 7. The fixing plate 12 and the spray nozzle 7 form a detachable structure through the limiting post. The fixing plate 12 and the mesh can realize the spraying effect of the atomizing nozzle 8. After spraying, the object can be removed and replaced to block the spray nozzle 7 through the detachable structure for cold pressing molding operation.

[0054] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the method for preparing 3D structurally reinforced boron carbide bulletproof inserts using cold pressing molds specifically includes the following steps:

[0055] Step 1: Open the door 11 of the box 1, place the three-dimensional structure made of titanium wire or tungsten wire on the cold pressing mold 2, and close the door 11;

[0056] Step 2: The hydraulic cylinder 1001 drives the hydraulic telescopic rod 1002, which pushes the upper mold 5 down. During the pressing process, the guide post 3 limits the upper mold 5. When the upper mold 5 is pressed down to a certain position, the baffles 6 on both sides will form a certain sealing space with the cold pressing lower mold 2.

[0057] Step 3: The prepared boron carbide powder can be placed into the structure through the connecting pipe 9 and sprayed onto the structure through the atomizing nozzle 8. During the spraying process, the vibration structure 4 is turned on, so that the drive motor 401 on one side of the vibration structure 4 drives the lead screw 402 to rotate. While rotating, the cold pressing mold 2 is moved. After moving, the drive motor 401 on the other side is controlled to operate again, so that the cold pressing mold 2 operates in the opposite direction. In this way, the cold pressing mold 2 is vibrated.

[0058] Step 4: During the vibration of the cold pressing mold 2, the springs 405 on both sides of the cold pressing mold 2 will provide a buffering force to the cold pressing mold 2. The rollers 404 enable the cold pressing mold 2 to move smoothly during the vibration. The rollers 404 and springs 405 reduce the damage to the placement groove 403.

[0059] Step 5: The ultrafine boron carbide powder, granulated by spraying, is filled into the gaps between the structure using vibration and atomizing nozzles 8.

[0060] Step 6: Control the lifting structure 10 to move the upper mold 5 upward, remove the baffle 6 and the fixing plate 12, and place a cover at the spray nozzle 7 to block the spray nozzle 7.

[0061] Step 7: Control the lifting structure 10 to press down. At this time, the upper mold 5 and the cold pressing lower mold 2 can cold press the structure and form it.

[0062] In summary:

[0063] This invention addresses the technical problem of using boron carbide to reinforce bulletproof inserts. Vibration is required to fill the gaps in the object with boron carbide, and the inserts need to be fabricated promptly after filling. However, some existing equipment is functionally limited, allowing only single-operation, which is inefficient. The invention employs the technical solutions described in the above embodiments. Furthermore, the implementation process of the above technical solutions is as follows:

[0064] When using this 3D structure-enhanced boron carbide bulletproof insert preparation method, firstly, open the door 11 of the housing 1, and place the three-dimensional 3D structure made of titanium or tungsten wire onto the cold-pressing mold 2. Close the door 11, and control the hydraulic cylinder 1001 of the lifting structure 10, causing the hydraulic cylinder 1001 to drive the hydraulic telescopic rod 1002. The hydraulic telescopic rod 1002 pushes the upper mold 5 down. During the down-pressing process, the guide column 3 limits the upper mold 5. When the upper mold 5 is pressed down to a certain position, its two side baffles 6 will form a certain sealed space with the cold-pressing mold 2. Then, the prepared boron carbide powder can be placed into the connecting pipe 9 and sprayed onto the structure through the atomizing nozzle 8. During the spraying process, the vibration structure 4 is activated, causing the drive motor 401 on one side of the vibration structure 4 to drive the lead screw 402 to rotate. At the same time, the rotation drives the cold-pressing mold 2 to move. After the movement, the other drive motor 401 is controlled to operate again, driving the cold pressing mold 2 to operate in the opposite direction. In this way, the cold pressing mold 2 vibrates. During the vibration of the cold pressing mold 2, the springs 405 on both sides of the cold pressing mold 2 provide buffering force to the cold pressing mold 2. The rollers 404 enable the cold pressing mold 2 to move smoothly during vibration. The rollers 404 and springs 405 reduce damage to the placement groove 403. With vibration and atomizing nozzle 8, the sprayed granulated boron carbide ultrafine powder fills the gap between the structure and the structure. Then, the lifting structure 10 can be controlled again to move the upper mold 5 upward, and the baffle 6 and fixing plate 12 are removed. A cover is placed at the spray nozzle 7 to block the spray nozzle 7. Finally, the lifting structure 10 is controlled again to press down. At this time, the upper mold 5 and the cold pressing mold 2 can cold press the structure and form it in it.

[0065] With the above-mentioned settings, this application will certainly solve the above-mentioned technical problems, and at the same time achieve the following technical effects:

[0066] The vibration structure 4 of this invention can drive the lead screw 402 to rotate by the rotation of the single-sided drive motor 401. While rotating, it drives the cold pressing mold 2 to move. After moving, it controls the other side drive motor 401 to operate again, driving the cold pressing mold 2 to operate in the opposite direction. In this way, the cold pressing mold 2 vibrates. During the vibration of the cold pressing mold 2, the springs 405 on both sides of the cold pressing mold 2 will provide a buffering force to the cold pressing mold 2. The rollers 404 enable the cold pressing mold 2 to move smoothly during vibration. The rollers 404 and springs 405 reduce damage to the placement groove 403.

[0067] The lifting structure 10 of the present invention drives the hydraulic telescopic rod 1002 through the hydraulic cylinder 1001 to press down the upper mold 5. When pressing down, the baffle 6 and the cold pressing mold 2 form a relatively sealed space, in which the 3D texture is filled with boron carbide.

[0068] The baffle 6 of this invention forms a sliding structure through a groove, and the baffle 6 is fixed by a slot and a buckle, so as to realize the detachable structure of the baffle 6 and the upper mold 5, and can complete the cold pressing molding operation after spraying.

[0069] The fixing plate 12 and the mesh set in this invention can achieve the spraying effect of the atomizing nozzle 8. After spraying, the object can be removed and replaced by a detachable structure to block the spray nozzle 7 for cold pressing molding.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a 3D structured reinforced boron carbide bulletproof insert, characterized in that, Includes the following steps: S1. Use titanium or tungsten wires to create a three-dimensional 3D texture; S2. Place the 3D texture into a cold pressing mold for cold pressing: S2-1. Place the 3D texture in a cold-pressing mold and fix it. The cold pressing mold includes a box body (1), a lower cold pressing mold (2) disposed inside the box body (1), and guide pillars (3) disposed on both sides of the lower cold pressing mold (2); the lower cold pressing mold (2) is provided with a vibration structure (4) inside, an upper mold (5) is provided above the vibration structure (4), baffles (6) are provided on both sides of the upper mold (5), a sliding groove is provided at the connection between the baffle (6) and the upper mold (5), the baffle (6) is slidably connected to the upper mold (5) through the sliding groove, a spray port (7) is provided in the middle of the upper mold (5), an atomizing nozzle (8) is provided inside the spray port (7), a fixing plate (12) is provided at the connection between the spray port (7) and the atomizing nozzle (8), a connecting pipe (9) is provided at the rear end of the atomizing nozzle (8), a lifting structure (10) is provided above the upper mold (5), and a box door (11) is provided on the outside of the box body (1); S2-2, the upper mold (5) is pressed down. During the pressing process, the guide post (3) limits the upper mold (5). When the upper mold (5) is pressed down to a certain position, the baffles (6) on both sides will form a certain sealing space with the cold pressing lower mold (2). S2-3. Fill the voids of the textured body with spray-granulated boron carbide ultrafine powder by vibration: Specifically, place the prepared boron carbide powder into the structure through the connecting pipe (9) and spray it onto the structure through the atomizing nozzle (8); S2-4. Control the lifting structure (10) to move the upper mold (5) upward, remove the baffle (6) and the fixing plate (12), and place a cover at the spray nozzle (7) to block the spray nozzle (7); control the lifting structure (10) to press down, so that the upper mold (5) and the cold pressing lower mold (2) can cold press the structure. S3. Cold pressing is performed in the cold pressing mold; S4. Hot pressing and sintering to prepare 3D structure-reinforced boron carbide bulletproof inserts.

2. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 1, characterized in that, The vibration structure (4) includes a drive motor (401), a lead screw (402), a placement groove (403), rollers (404), and springs (405). Both ends of the placement groove (403) are provided with drive motors (401), and the output end of the drive motor (401) is provided with a lead screw (402). Several sets of rollers (404) are provided at the connection between the placement groove (403) and the cold pressing mold (2). Several sets of springs (405) are provided above the rollers (404). One end of the spring (405) is fixed on the cold pressing mold (2), and the other end is set on the placement groove (403).

3. The method for preparing a 3D structure-reinforced boron carbide bulletproof insert according to claim 2, characterized in that, The lifting structure (10) includes a hydraulic cylinder (1001) and a hydraulic telescopic rod (1002), with the hydraulic telescopic rod (1002) located below the hydraulic cylinder (1001).

4. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 1, characterized in that, The upper mold (5) and the guide post (3) are provided with a through hole that matches the guide post (3).

5. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 1, characterized in that, The interior of the cold pressing mold (2) is provided with a mold groove 1, and the connection between the upper mold (5) and the mold groove 1 is provided with a mold groove 2 that matches the mold groove 1.

6. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 1, characterized in that, The inside of the slide is provided with a slot, and the connection between the baffle (6) and the slot is provided with a buckle that matches the slot.

7. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 1, characterized in that, The surface of the fixing plate (12) is provided with mesh.

8. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 7, characterized in that, A limiting post is provided at the connection between the fixing plate (12) and the spray nozzle (7), and the fixing plate (12) and the spray nozzle (7) form a detachable structure through the limiting post.

9. The method for preparing a 3D structurally reinforced boron carbide bulletproof insert according to claim 3, characterized in that, Specifically, the following steps are included: Step 1: Open the door (11) of the box (1) and place the three-dimensional structure made of titanium wire or tungsten wire on the cold pressing mold (2), and close the door (11). Step 2: The hydraulic cylinder (1001) drives the hydraulic telescopic rod (1002), and the hydraulic telescopic rod (1002) pushes the upper mold (5) down. During the pressing process, the guide column (3) limits the upper mold (5). When the upper mold (5) is pressed down to a certain position, the baffles (6) on both sides will form a certain sealing space with the cold pressing lower mold (2). Step 3: The prepared boron carbide powder can be placed into the structure through the connecting pipe (9) and sprayed onto the structure through the atomizing nozzle (8). During the spraying process, the vibration structure (4) is turned on, so that the drive motor (401) on one side of the vibration structure (4) drives the lead screw (402) to rotate. While rotating, the cold pressing mold (2) is moved. After moving, the drive motor (401) on the other side is controlled to operate, so that the cold pressing mold (2) operates in the opposite direction. In this way, the cold pressing mold (2) is vibrated. Step 4: During the vibration of the cold pressing mold (2), the spring (405) group on both sides of the cold pressing mold (2) will provide a buffering force to the cold pressing mold (2). Step 5: Fill the gaps in the structure with the spray-granulated boron carbide ultrafine powder by means of atomizing nozzle (8) in a oscillating manner; Step 6: Control the lifting structure (10) to move the upper mold (5) upward, remove the baffle (6) and the fixing plate (12), and place a cover at the spray nozzle (7) to block the spray nozzle (7). Step 7: Control the lifting structure (10) to press down, so that the upper mold (5) and the cold pressing lower mold (2) can cold press the structure and form it in the cold pressing.

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