Powder scattering mechanism

Abstract

A powder sprinkling mechanism relates to the technical field of preparation of carbon fiber prepreg and comprises a workbench, and a material preparation assembly, a powder sprinkling assembly, a powder uniformizing assembly and a collecting box are sequentially arranged on the top of the workbench from top to bottom in the feeding direction, the material preparation assembly comprises a resin powder material preparation groove formed in the top of the workbench and a vibration motor connected to the bottom of the resin powder material preparation groove. According to the utility model, powder falling from the blanking channel is guided by the drainage seat to be uniformly distributed on the surface of the metering roller. When the first servo motor drives the metering roller to rotate through the coupler, the transverse grains, the vertical grains or the crossed grains can meter and distribute powder and regulate and control the grabbing and releasing process of the powder, and compared with a needle roller of a single structure, the powder output quantity and the distribution state can be more accurately controlled. The powder is further homogenized in cooperation with a vibrating brush below, so that the powder scattering uniformity is improved, and the resin powder in the carbon fiber prepreg is distributed more uniformly.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber prepreg preparation technology, specifically a powder spreading mechanism. Background Technology

[0002] Carbon fiber composites have been increasingly widely used in aerospace and general industry due to their advantages such as lightweight, high strength, good fatigue resistance, and high designability. Carbon fiber prepreg is the main application form of carbon fiber. It is an intermediate material made by impregnating a resin matrix onto fibers or fabrics, and then storing it for later use after certain treatments. In the production of carbon fiber prepreg, the uniform distribution of resin powder is crucial to the performance of the prepreg.

[0003] A current Chinese patent (publication number: CN208826861U) relates to an automatic resin powder spreading machine, including a powder hopper, a needle roller, and a needle brush. The needle roller is located at the bottom of the powder hopper, and the outlet of the powder hopper is used to spread resin powder onto the surface of the needle roller. Several protrusions are evenly distributed on the surface of the needle roller to block the resin powder. The needle brush is located downstream of the powder hopper in the rotation direction of the needle roller and is used to evenly disperse the resin powder spread on the surface of the needle roller. The automatic resin powder spreading machine provided in this invention can accurately and evenly spread the setting powder onto carbon fiber cloth. After heating and curing, a set cloth with uniform thickness, uniform resin content, and neat fiber arrangement is obtained, resulting in a higher quality set cloth that better meets the application requirements.

[0004] During operation, the aforementioned equipment relies solely on gravity to discharge powder. However, in practice, factors such as differences in powder flowability and pressure variations within the powder hopper make it difficult to maintain consistent powder distribution, leading to powder accumulation or insufficient distribution. Secondly, while the equipment uses a rotating needle roller to evenly distribute powder, the needle roller's structure is relatively simple, lacking control over powder gripping and release. Relying solely on variations in roller speed makes precise powder distribution difficult. Furthermore, different particle sizes exhibit varying adhesion and detachment characteristics on the needle roller surface, compromising the uniformity of powder distribution during the dispensing process. Summary of the Invention

[0005] The purpose of this invention is to provide a powder-spreading mechanism to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides a powder-spreading mechanism, including a worktable. The top of the worktable, along the feeding direction, is sequentially arranged from top to bottom with a material preparation component, a powder-spreading component, a powder-leveling component, and a collection box.

[0007] The material preparation assembly includes a resin powder preparation tank located on the top of the workbench and a vibration motor connected to the bottom of the resin powder preparation tank. The discharge end of the resin powder preparation tank is connected to a feeding channel.

[0008] The powder spraying assembly includes a mounting frame located below the feeding channel, within which a detachable multi-directional texture metering roller is rotatably connected. A first servo motor for driving the multi-directional texture metering roller to rotate is installed within the worktable.

[0009] The multi-directional texture metering roller has horizontal, vertical, or cross-shaped lines.

[0010] The powder leveling assembly includes a vibrating brush positioned below a multi-directional texture metering roller.

[0011] Furthermore, the powder leveling assembly also includes a second servo motor connected within the workbench. The drive end of the second servo motor is connected to a rotating disk. An eccentric wheel is detachably connected to the rotating disk via an adjusting bolt. A connecting rod is rotatably connected to the top of the eccentric wheel. A first mounting bracket is rotatably connected to the other end of the connecting rod. The vibrating brush is connected to the end of the first mounting bracket away from the connecting rod.

[0012] Furthermore, a first connecting frame is connected to the top of the workbench, one end of which extends into the resin powder preparation tank. A second mounting frame is connected to the mounting frame, and temperature sensors are connected to both the first connecting frame and the second mounting frame.

[0013] Furthermore, a mounting frame is connected inside the workbench. A shorting plate is connected to one side of the mounting frame, and a connecting post is connected to the other side of the shorting plate. The mounting frame is inserted into the connecting post, and a reinforcing plate is provided on the other side of the mounting frame. The other end of the connecting post passes through the reinforcing plate, and an internal thread groove is opened at the other end of the connecting post. A return spring is sleeved on the connecting post, and a mounting plate is threaded to the other end of the connecting post. One end of the return spring abuts against the reinforcing plate, and the other end abuts against the mounting plate.

[0014] Furthermore, a first guide rail is connected to the workbench, a first slide rail is connected to the first mounting bracket, the first slide rail is slidably connected to the first guide rail, a second guide rail is connected inside the workbench, a second slide rail is connected to the first mounting bracket, and the second slide rail is slidably connected to the second guide rail.

[0015] Furthermore, a flow guide seat is connected inside the resin powder preparation tank, and a flow diversion seat is integrally formed inside the mounting frame.

[0016] Furthermore, a coupling is connected to the drive shaft of the first servo motor, and the other end of the coupling is connected to one end of the multi-directional texture metering roller.

[0017] Furthermore, the drive end of the second servo motor is connected to a steering box, and the driven end of the steering box is connected to the rotating disk.

[0018] Furthermore, an ion fan is connected to the top of the workbench, and a flow divider is connected inside the workbench. The air outlet of the ion fan is connected to the flow divider.

[0019] Furthermore, a feed inlet is provided on the top of the workbench, and a sealing plate is hinged to the feed inlet.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] The powder falling from the feeding channel is guided by the guide seat and evenly distributed on the surface of the metering roller. When the first servo motor drives the metering roller to rotate through the coupling, its horizontal, vertical, or cross-shaped grooves can accurately measure and initially distribute the powder, controlling the powder gripping and releasing process. Compared with a single-structure needle roller, it can more accurately control the powder output and distribution. Combined with the vibrating brush below, it further evens out the powder, improving the uniformity of powder application and making the resin powder distribution in the carbon fiber prepreg more uniform, effectively ensuring the performance of the prepreg and the quality of the final product.

[0022] The vibration motor drives the resin powder preparation tank to vibrate, which effectively avoids the problem of unstable feeding caused by the difference in the fluidity of the powder itself and the pressure change inside the powder hopper. At the same time, the guide seat in the preparation tank guides the powder to the discharge channel at the discharge end, avoiding powder accumulation or insufficient powder spreading.

[0023] When the multi-directional texture metering roller needs to be replaced according to different production processes, loosening the mounting plate and overcoming the spring force of the return spring allows the mounting frame to be easily pulled out from the connecting post, completing the disassembly. When installing a new metering roller, insert the mounting frame into the connecting post and tighten the mounting plate; the pressure provided by the return spring securely fixes the mounting frame. This design facilitates quick and easy replacement of the multi-directional texture metering roller, meeting the diverse needs of different production processes for metering roller patterns and improving the flexibility and adaptability of a powder-spreading mechanism.

[0024] A temperature sensor monitors the ambient temperature in real time during powder application and feeds the data back to the PID controller. Based on a preset temperature value, the controller precisely controls the operation of heating elements (such as heating wires) or cooling elements (such as cooling plates), using a fan to drive a cold or hot source to regulate the ambient temperature, effectively preventing resin powder from agglomerating due to static electricity or interparticle forces. Simultaneously, an ionizing fan generates ionized air, which is evenly distributed to the powder application area via a distributor, neutralizing static electricity on the powder surface. Attached Figure Description

[0025] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0027] Figure 3 This is a first top view of the present invention;

[0028] Figure 4 This is a second top view of the present invention;

[0029] Figure 5 This is a side view of the present invention;

[0030] Figure 6 This is a front view of the present invention;

[0031] Figure 7 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0032] Figure 8 This utility model Figure 4 Enlarged view of the structure at point B;

[0033] Figure 9 This utility model Figure 2 Enlarged view of the structure at point C;

[0034] Figure 10 This utility model Figure 5 Enlarged view of the structure of D in the middle;

[0035] Figure 11 This utility model Figure 6 Enlarged view of the structure at point E in the middle.

[0036] In the diagram: 1. Workbench; 2. Material preparation assembly; 201. Resin powder preparation tank; 202. Vibrating motor; 203. Feeding channel; 3. Powder spraying assembly; 301. Mounting frame; 302. Multi-directional texture metering roller; 303. First servo motor; 4. Powder leveling assembly; 401. Second servo motor; 402. Rotating disk; 403. Eccentric wheel; 404. Connecting rod; 405. First mounting bracket; 406. Vibrating brush; 5. First connecting bracket; 6. Second mounting bracket; 7. Temperature sensor; 8. Flow guide seat; 9. Coupling; 10. First guide rail; 11. First slide rail; 12. Second guide rail; 13. Second slide rail; 14. Mounting plate; 15. Return spring; 16. Sealing plate; 17. Ionizing fan; 18. Flow divider seat; 19. Control panel; 20. Sliding door; 21. Turning box; 22. Collection box. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Please see Figure 1-11 This utility model provides a technical solution: a powder-spreading mechanism, including a workbench 1. The top of the workbench 1, along the feeding direction, is sequentially arranged with a material preparation component 2, a powder-spreading component 3, a powder-eventing component 4, and a collection box 22.

[0039] The material preparation assembly 2 includes a resin powder preparation tank 201 set on the top of the workbench 1 and a vibration motor 202 connected to the bottom of the resin powder preparation tank 201. The discharge end of the resin powder preparation tank 201 is connected to a discharge channel 203.

[0040] The powder spraying assembly 3 includes a mounting frame 301 located below the feeding channel 203. A detachable multi-directional texture metering roller 302 is rotatably connected inside the mounting frame 301. A first servo motor 303 is installed inside the worktable 1 to drive the multi-directional texture metering roller 302 to rotate.

[0041] The multi-directional texture metering roller 302 has horizontal, vertical, or cross-shaped patterns.

[0042] The powder leveling assembly 4 includes a vibrating brush 406 disposed below the multi-directional texture metering roller 302.

[0043] It should be noted that a sliding door 20 is provided on one side of the workbench 1.

[0044] In practice, the carbon fiber cloth moves along the feeding direction on the workbench 1, while the resin powder is in the preparation assembly 2. The vibration motor 202 drives the resin powder preparation tank 201 to vibrate, allowing the powder to smoothly enter the feeding channel 203 and fall onto the multi-directional texture metering roller 302 of the powder spreading assembly 3. The first servo motor 303 drives the multi-directional texture metering roller 302 to rotate. The horizontal, vertical, or cross-shaped patterns on the metering roller measure and initially distribute the powder. Subsequently, the powder falls onto the vibrating brush 406 of the powder spreading assembly 4 below for further powder spreading. In this setup, the vibration motor 202 solves the problem of unstable powder spreading caused by differences in powder flowability and changes in internal pressure of the powder hopper. Compared with the simple needle roller, the multi-directional texture metering roller 302 can control the powder gripping and releasing process, achieving more precise powder distribution. The vibrating brush 406 further ensures the uniformity of powder distribution, solving the problem of ineffective guarantee of powder spreading uniformity in the background technology.

[0045] Please see Figure 1-11 The powder leveling assembly 4 also includes a second servo motor 401 connected to the workbench 1. The drive end of the second servo motor 401 is connected to a rotating disk 402. An eccentric wheel 403 is detachably connected to the rotating disk 402 by adjusting bolts. A connecting rod 404 is rotatably connected to the top of the eccentric wheel 403. A first mounting bracket 405 is rotatably connected to the other end of the connecting rod 404. A vibrating brush 406 is connected to the end of the first mounting bracket 405 away from the connecting rod 404.

[0046] In practice, the second servo motor 401 rotates after being powered on, driving the rotating disk 402 to rotate via the drive end. The eccentric wheel 403 on the rotating disk 402 rotates with the rotating disk 402. The eccentric wheel 403 converts the rotational motion into the linear reciprocating motion of the first mounting frame 405 via the connecting rod 404, thereby causing the vibrating brush 406 on the first mounting frame 405 to swing left and right to even out the powder. The adjusting bolt can change the position of the eccentric wheel 403 on the rotating disk 402, adjust the eccentricity, and thus change the swing amplitude of the vibrating brush 406. This setting facilitates driving the vibrating brush 406 to move back and forth.

[0047] Please see Figure 1-11 The top of the workbench 1 is connected to a first connecting frame 5, one end of which extends into the resin powder preparation tank 201. A second mounting frame 6 is connected to the mounting frame 301. Temperature sensors 7 are connected to both the first connecting frame 5 and the second mounting frame 6.

[0048] It should be noted that a heating element and a cooling element are provided on one side of the workbench 1. The heating element can be a heating wire, and the cooling element can be a cooling plate. A fan drives the cold source and the heat source. A PID controller is also provided. A control panel 19 is provided on the workbench 1 for controlling the electrical equipment on the workbench 1.

[0049] In practice, the temperature of the powder-spreading environment is monitored and adjusted in real time by the temperature sensor 7 to prevent the resin powder from agglomerating at room temperature due to static electricity or interparticle forces, thus ensuring the continuity and stability of the powder-spreading process.

[0050] Please see Figure 1-11 The workbench 1 is connected to a mounting bracket. A shorting plate is connected to one side of the mounting bracket, and a connecting post is connected to the other side of the shorting plate. The mounting frame 301 is inserted into the connecting post. A reinforcing plate is provided on the other side of the mounting frame 301. The other end of the connecting post passes through the reinforcing plate. An internal thread groove is opened on the other end of the connecting post. A return spring 15 is sleeved on the connecting post. A mounting plate 14 is threadedly connected to the other end of the connecting post. One end of the return spring 15 abuts against the reinforcing plate, and the other end abuts against the mounting plate 14.

[0051] In practice, when the multi-directional texture metering roller 302 needs to be disassembled, the mounting plate 14 is loosened to overcome the elastic force of the return spring 15, and the mounting frame 301 is pulled out from the connecting column. During installation, the mounting frame 301 is inserted into the connecting column, the mounting plate 14 is tightened, and the return spring 15 provides pressure to fix the mounting frame 301. This setting realizes the disassembly and installation of the multi-directional texture metering roller 302, which facilitates the quick replacement of multi-directional texture metering rollers 302 with different textures according to different production process requirements, so as to accurately control the powder distribution and improve the flexibility and adaptability of the powder spreading mechanism.

[0052] Please see Figure 1-11 The workbench 1 is connected to a first guide rail 10, and the first mounting bracket 405 is connected to a first slide rail 11. The first slide rail 11 is slidably connected to the first guide rail 10. The workbench 1 is connected to a second guide rail 12, and the first mounting bracket 405 is connected to a second slide rail 13. The second slide rail 13 is slidably connected to the second guide rail 12.

[0053] In practice, the first mounting frame 405 is guided and constrained from two directions by the first guide rail 10 and the second guide rail 12. Compared with a single guide structure, this can better ensure the stability and accuracy of the movement of the vibrating brush 406, resulting in better powder distribution and improved powder uniformity.

[0054] Please see Figure 1-11 The resin powder preparation tank 201 is connected to a flow guide seat 8, and the mounting frame 301 is integrally formed with a flow guide seat.

[0055] In practice, the resin powder is stored in the resin powder preparation tank 201 and begins to flow under the action of the vibrating motor 202. The guide seat 8 is set in the preparation tank and guides the flow direction of the powder, so that the resin powder falling from the feeding channel 203 reaches the vicinity of the multi-directional texture metering roller 302 in the mounting frame 301. The integrally formed guide seat in the mounting frame 301 further guides the powder.

[0056] Please see Figure 1-11 A coupling 9 is connected to the drive shaft of the first servo motor 303, and the other end of the coupling 9 is connected to one end of the multi-directional texture metering roller 302.

[0057] In practice, when the first servo motor 303 is working, the drive shaft rotates and transmits power to the multi-directional texture metering roller 302 through the coupling 9, thereby driving the multi-directional texture metering roller 302 to rotate stably.

[0058] Please see Figure 1-11 The drive end of the second servo motor 401 is connected to the steering box 21, and the driven end of the steering box 21 is connected to the rotating disk 402.

[0059] In practice, the second servo motor 401 drives the rotation, and the power is transmitted to the rotating disk 402 after the direction is changed through the steering box 21, which drives the rotating disk 402 to rotate, thereby driving the eccentric wheel 403 and other subsequent structures to move, so as to realize the powder-eventing action of the vibrating brush 406.

[0060] Please see Figure 1-11 An ion fan 17 is connected to the top of the workbench 1, and a diverter seat 18 is connected inside the workbench 1. The air outlet of the ion fan 17 is connected to the diverter seat 18.

[0061] In practice, when the ion fan 17 is working, it generates ion wind, which is evenly distributed to the powder spreading area through the distributor 18 to neutralize the static electricity on the surface of the resin powder. This setting, through the static elimination mechanism composed of the ion fan 17 and the distributor 18, can effectively eliminate the static electricity on the surface of the resin powder, avoid the powder from attracting each other and agglomerating due to static electricity, ensure that the powder can be evenly distributed during the powder spreading process, and improve the powder spreading quality and prepreg performance.

[0062] Please see Figure 1-11 The top of the workbench 1 is provided with a feed inlet, and a sealing plate 16 is hinged to the feed inlet.

[0063] In practice, when resin powder needs to be added to the workbench 1, the hinged sealing plate 16 is opened; after the addition is completed, the sealing plate 16 is closed to seal the feed port.

[0064] Working principle: Resin powder is poured into the resin powder preparation tank 201. After completion, the sealing plate 16 is closed to prevent external impurities from entering and affecting the powdering quality. The vibration motor 202 is started, driving the resin powder preparation tank 201 to vibrate. Under the action of vibration, the resin powder, which may have been difficult to feed stably due to differences in flowability or changes in the internal pressure of the powder hopper, begins to flow. The guide seat 8 in the preparation tank guides the powder to the discharge channel 203 at the discharge end.

[0065] The resin powder falling from the feeding channel 203 reaches the vicinity of the multi-directional texture metering roller 302 inside the mounting frame 301. The guide seat inside the mounting frame 301 further guides the powder to be evenly distributed on the surface of the multi-directional texture metering roller 302. At this time, the first servo motor 303 drives the multi-directional texture metering roller 302 to rotate through the coupling 9. The horizontal, vertical, or cross-shaped patterns on the metering roller measure and initially distribute the powder, realizing precise control of the powder gripping and releasing process. Compared with the traditional single-structure needle roller, it can more accurately control the output amount and distribution state of the powder.

[0066] The powder initially distributed by the multi-directional texture metering roller 302 falls onto the vibrating brush 406 of the powder-spreading assembly 4 below. The second servo motor 401 is energized and rotates, its drive end driving the rotating disk 402 to rotate, and the eccentric wheel 403 on the rotating disk 402 rotates accordingly. The eccentric wheel 403 converts the rotational motion into linear reciprocating motion of the first mounting frame 405 through the connecting rod 404, causing the vibrating brush 406 on the first mounting frame 405 to swing left and right to spread the powder. The first slide rail 11 and the second slide rail 13 on the first mounting frame 405 slide on the first guide rail 10 and the second guide rail 12 respectively, guiding and constraining the first mounting frame 405 from two directions, ensuring the stability of the vibrating brush 406's movement and further improving the uniformity of powder spreading.

[0067] Throughout the powder application process, temperature sensor 7 monitors the temperature in the resin powder preparation tank 201 and near the powder application assembly 3 in real time, and feeds the data back to the PID controller. The PID controller, based on a preset temperature value, controls the operation of heating elements (such as heating wires) or cooling elements (such as cooling plates), using a fan to drive a cold or hot source to regulate the temperature of the powder application environment. This prevents the resin powder from agglomerating due to static electricity or interparticle forces, ensuring the continuity and stability of the powder application process. Simultaneously, ion fan 17 generates ionized air, which is evenly distributed to the powder application area via a distributor 18. This neutralizes static electricity on the resin powder surface, preventing powder agglomeration due to static electricity, and further ensuring uniform powder distribution during the application process.

[0068] When it is necessary to replace the multi-directional texture metering roller 302 with different textures according to different production processes, loosen the mounting plate 14, overcome the elastic force of the return spring 15, and pull the mounting frame 301 out of the connecting column to complete the disassembly; when installing a new metering roller, insert the mounting frame 301 into the connecting column, tighten the mounting plate 14, and the return spring 15 provides pressure to fix the mounting frame 301, so as to realize the replacement of the metering roller conveniently and quickly, and improve the flexibility and adaptability of the powder spreading mechanism.

Claims

1. A powder-spreading mechanism, comprising a worktable (1), characterized in that, The top of the workbench (1) is provided with a material preparation component (2), a powder spraying component (3), a powder leveling component (4), and a collection box (22) arranged sequentially from top to bottom along the feeding direction. The material preparation assembly (2) includes a resin powder preparation tank (201) set on the top of the workbench (1) and a vibration motor (202) connected to the bottom of the resin powder preparation tank (201). The discharge end of the resin powder preparation tank (201) is connected to a discharge channel (203). The powder spraying assembly (3) includes a mounting frame (301) located below the feeding channel (203), and a detachable multi-directional texture metering roller (302) is rotatably connected inside the mounting frame (301). A first servo motor (303) for driving the multi-directional texture metering roller (302) to rotate is provided inside the worktable (1). The multi-directional texture metering roller (302) has horizontal, vertical, or cross-shaped patterns. The powder leveling assembly (4) includes a vibrating brush (406) disposed below the multi-directional texture metering roller (302).

2. The powder-spreading mechanism as described in claim 1, characterized in that: The powder leveling assembly (4) further includes a second servo motor (401) connected to the workbench (1). The drive end of the second servo motor (401) is connected to a rotating disk (402). An eccentric wheel (403) is detachably connected to the rotating disk (402) by adjusting bolts. A connecting rod (404) is rotatably connected to the top of the eccentric wheel (403). A first mounting bracket (405) is rotatably connected to the other end of the connecting rod (404). The vibrating brush (406) is connected to the end of the first mounting bracket (405) away from the connecting rod (404).

3. The powder-spreading mechanism as described in claim 1, characterized in that: The top of the workbench (1) is connected to a first connecting frame (5), one end of which extends into the resin powder preparation tank (201). A second mounting frame (6) is connected to the mounting frame (301), and temperature sensors (7) are connected to both the first connecting frame (5) and the second mounting frame (6).

4. The powder-spreading mechanism as described in claim 1, characterized in that: The workbench (1) is connected to a mounting frame. A shorting plate is connected to one side of the mounting frame, and a connecting column is connected to the other side of the shorting plate. The mounting frame (301) is inserted into the connecting column. A reinforcing plate is provided on the other side of the mounting frame (301). The other end of the connecting column passes through the reinforcing plate. An internal thread groove is opened on the other end of the connecting column. A return spring (15) is sleeved on the connecting column. A mounting plate (14) is threaded to the other end of the connecting column. One end of the return spring (15) abuts against the reinforcing plate, and the other end abuts against the mounting plate (14).

5. A powder-spreading mechanism as described in claim 2, characterized in that: The workbench (1) is connected to a first guide rail (10), the first mounting bracket (405) is connected to a first slide rail (11), the first slide rail (11) is slidably connected to the first guide rail (10), the workbench (1) is connected to a second guide rail (12), the first mounting bracket (405) is connected to a second slide rail (13), the second slide rail (13) is slidably connected to the second guide rail (12).

6. A powder-spreading mechanism as described in claim 2, characterized in that: The resin powder preparation tank (201) is connected to a flow guide seat (8), and the mounting frame (301) is integrally formed with a flow guide seat.

7. The powder-spreading mechanism as described in claim 1, characterized in that: A coupling (9) is connected to the drive shaft of the first servo motor (303), and the other end of the coupling (9) is connected to one end of the multi-directional texture metering roller (302).

8. A powder-spreading mechanism as described in claim 2, characterized in that: The drive end of the second servo motor (401) is connected to a steering box (21), and the driven end of the steering box (21) is connected to the rotating disk (402).

9. A powder-spreading mechanism as described in claim 1, characterized in that: An ion fan (17) is connected to the top of the workbench (1), and a diverter seat (18) is connected inside the workbench (1). The air outlet of the ion fan (17) is connected to the diverter seat (18).

10. A powder-spreading mechanism as described in claim 1, characterized in that: The top of the workbench (1) is provided with a feed inlet, and a sealing plate (16) is hinged to the feed inlet.

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