A 3D printing metal powder processing device

Abstract

The utility model discloses a 3D printing metal powder processing treatment equipment, including hopper, the top of hopper is provided with static electricity removal mechanism, through the high -voltage generator and the discharge needle of static electricity removal mechanism inside setting cooperation form strong electric field, make air molecule be ionized, decompose into the positive ion of positive charge and the negative ion of negative charge, utilize the fan to provide controllable air volume again, adjust ion delivery efficiency and coverage, blow the positive ion of positive charge and the negative ion of negative charge to the surface of grinding roller and the inner wall of grinding bin, neutralize the charge of grinding roller and grinding bin surface, finally make the surface charge of grinding roller and grinding bin inner wall zero, eliminate static adsorption or discharge risk, and after static elimination will not adsorb metal powder, thereby prevent the mixing of different kinds of metal powder, cause the quality problem of finished product part.

Description

Technical Field

[0001] This utility model relates to the field of metal powder processing technology, specifically to a 3D printing metal powder processing equipment. Background Technology

[0002] Metal powder for 3D printing is a special consumable used in metal additive manufacturing (such as SLM, EBM and other technologies). It must meet stringent requirements such as high purity, sphericity, and particle size control. It is formed into complex metal parts by melting and shaping layer by layer through laser or electron beam. The metal powder processing equipment uses grinding rollers to grind and crush the metal powder to ensure that the microstructure characteristics of the powder meet the printing requirements, such as porosity, hollow powder ratio and inclusions, thereby optimizing the performance and reliability of the final part.

[0003] When a metal grinding roller rubs against metal powder, charge transfer occurs due to friction on the metal surface. Since the grinding roller is usually made of non-conductive material, the charge cannot be conducted away in time. After accumulation, it forms an electrostatic adsorption effect, causing metal powder to adhere to the surface of the grinding roller. If a different type of metal powder is used, the metal powder remaining on the surface of the grinding roller will mix with the new metal powder, resulting in quality problems such as density and mechanical properties in the 3D printed product. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problems mentioned above and / or existing 3D printing metal powder processing equipment, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] A 3D printing metal powder processing device includes a hopper, the top of which is provided with an anti-static mechanism;

[0008] The static elimination mechanism includes an ion fan installed at the top of the hopper. The top and bottom of the ion fan are respectively provided with an air inlet and an air outlet. A fan hood is fixedly installed inside the air inlet. A fan is installed inside the fan hood. A connecting shell is installed inside the connecting shell. A mounting bracket is fixedly connected inside the connecting shell. A discharge needle is fixedly installed inside the mounting bracket.

[0009] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, a locking block is fixedly connected to the outer surface of the connecting shell, and a locking groove is provided inside the air shroud, with the locking block and the locking groove cooperating with each other.

[0010] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, a grinding chamber is provided at the bottom of the hopper, a conveying chamber is fixedly connected to the bottom of the grinding chamber, a connecting pipe is provided at the connection between the conveying chamber and the grinding chamber, an inlet is provided at the top of the hopper, and an outlet is provided at one end of the conveying chamber.

[0011] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, the inside of the material feeding bin is provided with a conveying mechanism. The conveying mechanism includes a first drive motor fixedly installed at one end of the material feeding bin, and the output end of the first drive motor is fixedly connected to a conveying roller.

[0012] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, a grinding mechanism is provided inside the grinding chamber. The grinding mechanism includes a protective shell fixedly installed on one side of the grinding chamber. A second drive motor is provided inside the protective shell. A transmission gear set is provided at the output end of the second drive motor and on one side of the grinding chamber.

[0013] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, two grinding rollers are rotatably connected inside the grinding chamber, and the transmission gear set is disposed inside the protective shell and penetrates one side of the grinding chamber. The two grinding rollers are respectively fixedly installed at one end of the transmission gear set inside the grinding chamber.

[0014] As a preferred embodiment of the 3D printing metal powder processing equipment described in this utility model, the top of the hopper is fixedly connected with multiple fasteners, and the ion fan is installed on the top of the hopper using the fasteners.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] A strong electric field is created by the high-voltage generator and discharge needle inside the static elimination mechanism. This ionizes air molecules, breaking them down into positively charged ions and negatively charged ions. A fan provides a controllable airflow to adjust the ion delivery efficiency and coverage, blowing the positively charged ions and negatively charged ions onto the surface of the grinding roller and the inner wall of the grinding chamber. This neutralizes the charge on the surface of the grinding roller and the inner wall of the grinding chamber, ultimately reducing the surface charge to zero. This eliminates the risk of electrostatic adsorption or discharge. Once the static electricity is eliminated, metal powder will not be adsorbed, thus preventing the mixing of different types of metal powder and avoiding quality problems in the finished parts. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of a 3D printing metal powder processing equipment according to the present invention;

[0019] Figure 2 This is a schematic diagram of the grinding mechanism in a 3D printing metal powder processing equipment according to the present invention;

[0020] Figure 3 This is a schematic diagram of the feeding mechanism in a 3D printing metal powder processing equipment according to the present invention.

[0021] Figure 4 This is a schematic diagram of the static elimination mechanism in a 3D printing metal powder processing equipment according to the present invention.

[0022] Figure 5 This is a schematic diagram of the internal structure of the static elimination mechanism in a 3D printing metal powder processing equipment according to this utility model.

[0023] In the diagram: 1. Hopper; 2. Grinding chamber; 3. Conveying chamber; 4. Connecting pipe; 5. Inlet; 6. Outlet; 7. First drive motor; 8. Conveying roller; 9. Protective shell; 10. Second drive motor; 11. Transmission gear set; 12. Grinding roller; 13. Fixing component; 14. Ionizing fan; 15. Air inlet; 16. Air outlet; 17. Fan cover; 18. Fan; 19. Connecting shell; 20. Locking block; 21. Locking slot; 22. Mounting bracket; 23. Discharge needle. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] Please see Figures 1-5 This utility model provides a technical solution:

[0029] A 3D printing metal powder processing device includes a hopper 1. The top of the hopper 1 is equipped with an antistatic mechanism. The antistatic mechanism forms a strong electric field through the cooperation of an internal high-voltage generator and a discharge needle 23, which ionizes air molecules and decomposes them into positively charged positive ions and negatively charged negative ions. The positively charged positive ions and negatively charged negative ions are then blown onto the surface of a grinding roller 12 to neutralize the charge on the surface of the grinding roller 12. Finally, the surface charge of the grinding roller 12 and the inner wall of the grinding chamber 2 is reduced to zero, eliminating the risk of electrostatic adsorption or discharge. After the static electricity is eliminated, metal powder will not be adsorbed, thereby preventing the mixing of different types of metal powder and causing quality problems in the finished parts.

[0030] The static elimination mechanism includes an ion fan 14 installed at the top of the hopper 1. The top and bottom of the ion fan 14 are respectively provided with an air inlet 15 and an air outlet 16. A fan hood 17 is fixedly installed inside the air inlet 15. A fan 18 is installed inside the fan hood 17. A connecting shell 19 is installed inside the fan hood 17. A mounting bracket 22 is fixedly connected inside the connecting shell 19. A discharge needle 23 is fixedly installed inside the mounting bracket 22. The fan 18 provides a controllable airflow, which can adjust the ion delivery efficiency and coverage area.

[0031] A locking block 20 is fixedly connected to the outer surface of the connecting shell 19, and a locking groove 21 is provided inside the fan cover 17. The locking block 20 and the locking groove 21 cooperate with each other. Through the cooperation between the locking block 20 and the locking groove 21, the fan cover 17 and the connecting shell 19 can be quickly disassembled and assembled, which facilitates the maintenance and cleaning of the ion fan 14.

[0032] When in use, metal powder is first added into the equipment through the feed port 5. The metal powder will enter the grinding chamber 2 from the hopper 1. Then, the two grinding rollers 12 will grind and crush the metal powder. When the metal powder particles meet the requirements, they will fall into the conveying chamber 3. Finally, the metal powder is sent out by the conveying roller 8.

[0033] During the grinding of metal powder, the static elimination mechanism also operates. First, the high-voltage generator and the discharge needle 23 work together to form a strong electric field, ionizing and decomposing molecules in the air into positively charged positive ions and negatively charged negative ions. Then, the fan 18 blows these ions into the grinding chamber 2, where they come into contact with the grinding roller 12 and the inner wall of the grinding chamber 2, neutralizing the surface charge and bringing the surface charge to zero, thus achieving the static elimination effect. This prevents the statically adsorbed metal powder from mixing with other types of powder, which could affect the quality of the finished parts.

[0034] Example 2

[0035] Please see Figures 1-5 This utility model provides a technical solution:

[0036] A grinding chamber 2 is provided at the bottom of the hopper 1. A conveying chamber 3 is fixedly connected to the bottom of the grinding chamber 2. A connecting pipe 4 is provided at the connection between the conveying chamber 3 and the grinding chamber 2. An inlet 5 is provided at the top of the hopper 1. An outlet 6 is provided at one end of the conveying chamber 3.

[0037] The material conveying bin 3 is equipped with a conveying mechanism, which includes a first drive motor 7 fixedly installed at one end of the material conveying bin 3. The output end of the first drive motor 7 is fixedly connected to a conveying roller 8. The spiral pattern on the surface of the conveying roller 8 can prevent metal powder from accumulating and reduce the risk of blockage.

[0038] The grinding chamber 2 is equipped with a grinding mechanism, which includes a protective shell 9 fixedly installed on one side of the grinding chamber 2. A second drive motor 10 is installed inside the protective shell 9. A transmission gear set 11 is installed at the output end of the second drive motor 10 and on one side of the grinding chamber 2.

[0039] The grinding chamber 2 has two grinding rollers 12 rotatably connected inside. The transmission gear set 11 is located inside the protective shell 9 and passes through one side of the grinding chamber 2. The two grinding rollers 12 are respectively fixedly installed at one end of the transmission gear set 11 inside the grinding chamber 2. The distance between the two grinding rollers 12 is adjustable, and the particle size of the metal powder can be controlled according to the requirements to meet different types of metal powder and different production requirements, thereby enhancing the wide applicability of the equipment.

[0040] Multiple fasteners 13 are fixedly connected to the top of the hopper 1, and the ion fan 14 is installed on the top of the hopper 1 using the fasteners 13.

[0041] Unlike Embodiment 1, the particle size of the metal powder can be controlled according to actual requirements by using two grinding rollers 12 with adjustable spacing to meet different metal powders or different production requirements, thereby enhancing the versatility of the equipment. At the same time, the metal powder is conveyed out by a conveying roller 8 with spiral patterns, and the spiral patterns can break up the accumulated metal powder and reduce the risk of blockage.

[0042] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A 3D printing metal powder processing device, comprising a hopper (1), characterized in that, The top of the hopper (1) is provided with an anti-static mechanism; The static elimination mechanism includes an ion fan (14) installed at the top of the hopper (1). The top and bottom of the ion fan (14) are respectively provided with an air inlet (15) and an air outlet (16). A fan hood (17) is fixedly installed inside the air inlet (15). A fan (18) is installed inside the fan hood (17). A connecting shell (19) is installed inside the fan hood (17). A mounting bracket (22) is fixedly connected inside the connecting shell (19). A discharge needle (23) is fixedly installed inside the mounting bracket (22).

2. The 3D printing metal powder processing equipment according to claim 1, characterized in that, The outer surface of the connecting shell (19) is fixedly connected with a locking block (20), and the inside of the wind cover (17) is provided with a locking groove (21). The locking block (20) and the locking groove (21) cooperate with each other.

3. The 3D printing metal powder processing equipment according to claim 1, characterized in that, The bottom end of the hopper (1) is provided with a grinding chamber (2), the bottom end of the grinding chamber (2) is fixedly connected with a conveying chamber (3), a connecting pipe (4) is provided at the connection between the conveying chamber (3) and the grinding chamber (2), the top end of the hopper (1) is provided with an inlet (5), and one end of the conveying chamber (3) is provided with an outlet (6).

4. The 3D printing metal powder processing equipment according to claim 3, characterized in that, The material conveying bin (3) is equipped with a conveying mechanism inside. The conveying mechanism includes a first drive motor (7) fixedly installed at one end of the material conveying bin (3). The output end of the first drive motor (7) is fixedly connected to a conveying roller (8).

5. The 3D printing metal powder processing equipment according to claim 4, characterized in that, The grinding chamber (2) is equipped with a grinding mechanism. The grinding mechanism includes a protective shell (9) fixedly installed on one side of the grinding chamber (2). A second drive motor (10) is installed inside the protective shell (9). A transmission gear set (11) is installed at the output end of the second drive motor (10) and on one side of the grinding chamber (2).

6. The 3D printing metal powder processing equipment according to claim 5, characterized in that, The grinding chamber (2) is rotatably connected to two grinding rollers (12). The transmission gear set (11) is located inside the protective shell (9) and passes through one side of the grinding chamber (2). The two grinding rollers (12) are respectively fixedly installed at one end of the transmission gear set (11) inside the grinding chamber (2).

7. The 3D printing metal powder processing equipment according to claim 1, characterized in that, The top of the hopper (1) is fixedly connected to a plurality of fasteners (13), and the ion fan (14) is installed on the top of the hopper (1) using the fasteners (13).

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