3D metal printing mixing and screening system

Abstract

The invention discloses a 3D metal printing mixing and screening system, and belongs to the technical field of mixing and screening. The device further comprises a refining mechanism and a mixing mechanism; the material storing and conveying mechanism is mounted at the upper end of the material uniformizing mechanism through an external bracket; the mixing mechanism is mounted at the lower end of the material uniformizing mechanism through an external bracket; the material uniformizing mechanism comprises a material mixing assembly and a uniform spreading assembly, the material mixing assembly is mounted at the upper end of the mixing mechanism, and the uniform spreading assembly is mounted at the upper end of the mixing mechanism; the mixing mechanism comprises a vibrating screen assembly and a discharging assembly, the vibrating screen assembly is installed at the lower end of the mixing assembly, the discharging assembly is installed at the lower end of the vibrating screen assembly, and a uniform spreading assembly is installed at the upper end of the vibrating screen assembly. And through combination with multiple vibration modes of the mixing mechanism, the screening efficiency and the working stability are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of hybrid screening technology, and particularly relates to a 3D metal printing hybrid screening system. Background Technology

[0002] As an emerging manufacturing method, 3D printing offers a high degree of freedom and precision. Correspondingly, it also has high requirements for raw materials. A common screening system uses a linear screen.

[0003] Chinese patent CN220092095U discloses a linear screen, comprising: a linear screen body, an anti-clogging unit for separating agglomerated raw materials, and a power unit; the linear screen body has arched side boxes at both ends, and each side box has a transmission mechanism inside, with a toothed belt fitted to the rotating end of each transmission mechanism; the anti-clogging unit includes two connecting rods connecting the front and rear toothed belts, each connecting rod having a sliding strip slidably connected to it, each sliding strip having an equally spaced arc groove inside, a fixed shaft inside the arc groove, and a deflector inside the arc groove, the deflector sliding on the fixed shaft through a slot, and a pulling member at the upper end of the deflector to separate the agglomerated molecular sieves; however, this device and the prior art still have the following technical problems:

[0004] 1. This device separates agglomerated raw materials by the vibration intensity of the linear screen itself, so that the raw materials can be screened by the screen. However, this device relies too much on the single power unit of the linear screen. When faced with a large batch of complex mixed raw materials, the single power unit cannot effectively break up particle agglomeration and is difficult to adapt to the needs of large-scale production.

[0005] 2. The device uses the tensioning element at the top of the deflector to push the molecular sieve apart and uses soft strips to clear the molecular sieve stuck on the screen. However, blockages have already occurred during the screening process, and raw materials that have not been completely screened often fall into the wrong position, which greatly reduces the screening accuracy.

[0006] 3. The device has arched side boxes at both the front and rear ends, but the whole device is an open structure. When screening easily oxidized raw materials, the raw materials are easily oxidized due to full contact with air.

[0007] Based on this, the present invention designs a 3D metal printing hybrid screening system to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a 3D metal printing hybrid screening system, which aims to solve the technical problems in the prior art that are difficult to adapt to the needs of large-scale production, greatly reduce screening accuracy, and easily lead to oxidation of raw materials due to full contact with air.

[0009] To achieve the above objectives, the 3D metal printing mixing and screening system provided in this embodiment of the invention includes a material storage and conveying mechanism;

[0010] It also includes a uniform material distribution mechanism, a mixing mechanism, and a ventilation mechanism;

[0011] The material storage and conveying mechanism is installed on the upper end of the material leveling mechanism via an external bracket, and the mixing mechanism is installed on the lower end of the material leveling mechanism via an external bracket.

[0012] The material mixing mechanism includes a mixing component and a uniform spreading component. The mixing component is installed at the upper end of the mixing mechanism, and the uniform spreading component is installed at the upper end of the mixing mechanism.

[0013] The mixing mechanism includes a vibrating screen assembly and a discharge assembly. The vibrating screen assembly is installed at the lower end of the mixing assembly, and the discharge assembly is installed at the lower end of the vibrating screen assembly. A uniform spreading assembly is installed at the upper end of the vibrating screen assembly. The ventilation mechanism is installed at the outer end of the material storage and conveying mechanism.

[0014] Furthermore, the mixing assembly includes a premixing cylinder, a stirring shaft, a No. 1 motor, and stirring paddles. The premixing cylinder is installed at the lower end of the storage and conveying mechanism via an external bracket. The No. 1 motor is fixedly connected to the upper end of the premixing cylinder. The stirring shaft is rotatably connected to the upper end inside the premixing cylinder. The output end of the No. 1 motor extends to the inner end of the premixing cylinder and is fixedly connected to the rotating end of the stirring shaft. Two sets of stirring paddles are fixedly connected at symmetrical positions on the side end of the stirring shaft.

[0015] Furthermore, the lower end of the premixing cylinder is a conical cylinder, and the outer end of the stirring paddle is a conical structure adapted to the inner end of the conical cylinder.

[0016] Furthermore, the uniform spreading assembly includes a bent pipe, a second motor, a mounting frame, and a reciprocating oscillating assembly. The bent pipe is installed on the upper end of the vibrating screening assembly, the mounting frame is installed on the upper end of the vibrating screening assembly, the input end of the bent pipe is rotatably connected to the output end of the premixing cylinder, the second motor is fixedly connected to the upper end of the mounting frame, and the reciprocating oscillating assembly is installed on the lower end of the mounting frame.

[0017] Furthermore, the reciprocating swing assembly includes a first connecting plate, a second connecting plate, and a third connecting plate. The output end of the second motor extends to the lower end of the mounting bracket and is fixedly connected to the upper end of one end of the first connecting plate. The lower end of the other end of the first connecting plate is rotatably connected to one end of the upper part of the second connecting plate. The side end of one end of the third connecting plate is fixedly connected to the side end of the bend pipe, and the upper end of the other end of the third connecting plate is rotatably connected to the lower end of the second connecting plate away from the first connecting plate.

[0018] Furthermore, the vibrating screening assembly includes a linear vibrating screen, an ultrasonic generator, an air injection pipe, and an ultrasonic transducer. The bent pipe is located at the upper end of the input end of the linear vibrating screen. The ultrasonic generator is fixedly connected to the side end of the linear vibrating screen, and the ultrasonic transducer is fixedly connected to the inner end of the linear vibrating screen. The output end of the ultrasonic generator is fixedly connected to the input end of the ultrasonic transducer through a wire passing through the outer end of the linear vibrating screen. Two sets of air injection pipes are fixedly connected at symmetrical positions on the side end of the linear vibrating screen, and the mounting bracket is fixedly connected to the upper end of the linear vibrating screen.

[0019] Furthermore, the discharge assembly includes a pneumatic butterfly valve, a first discharge hopper, and a second discharge hopper. The first discharge hopper is fixedly connected to the first output end of the linear vibrating screen, the second discharge hopper is fixedly connected to the second output end of the linear vibrating screen, and the pneumatic butterfly valve is fixedly connected to the output end of the second discharge hopper.

[0020] Furthermore, the material storage and conveying mechanism includes a material storage assembly and a material unloading assembly. The material storage assembly includes a material storage hopper, a cantilever beam load cell, a gas storage tank, an explosion-proof pulse solenoid valve, and a gas outlet pipe. Two sets of material storage hoppers are located symmetrically at the upper end of the premixing cylinder. Multiple sets of cantilever beam load cells supported by external brackets are fixedly connected to the symmetrical positions at the four corners of the lower end of the material storage hopper. A gas storage tank is fixedly connected to the side end of the material storage hopper. An explosion-proof pulse solenoid valve is fixedly connected to the upper end of the material storage hopper. The input end of the explosion-proof pulse solenoid valve is fixedly connected to the output end of the gas storage tank. The output end of the explosion-proof pulse solenoid valve is fixedly connected to the gas input end of the material storage hopper. A gas outlet pipe is fixedly connected to the side end of the material storage hopper.

[0021] Furthermore, the unloading assembly includes an unloading valve and a manifold tee. The unloading valve is fixedly connected to the output end of the storage tank. The first and second input ends of the manifold tee are respectively fixedly connected to the output ends of the two sets of unloading valves. The output end of the manifold tee is fixedly connected to the input end of the premixing cylinder. The premixing cylinder is fixedly connected to the lower end of the manifold tee via an external bracket.

[0022] Furthermore, the ventilation mechanism includes an intake valve, a first exhaust valve, a second exhaust valve, an intake pipe, a delivery pipe, a waste discharge pipe, an intake pipe for the storage tank, an exhaust pipe for the storage tank, an oxygen sensor, and a pressure sensor. The output end of the intake pipe is fixedly connected to the port of a set of injection pipes, and the input end of the intake pipe is fixedly connected to an external inert gas intake pump. The intake pipe for the storage tank is fixedly connected to the outer end of the storage tank, and the exhaust pipe for the storage tank is fixedly connected to the outer end of the storage tank. The input end of the delivery pipe is fixedly connected to the port of another set of injection pipes, and the output end of the delivery pipe is fixedly connected to the ports of the two sets of intake pipes for the storage tanks. The exhaust pipe for the storage tank... The port is fixedly connected to a waste discharge pipe, the air inlet pipe is fixedly connected to both ends of the air inlet valve, the two sets of storage tank exhaust pipes are fixedly connected to both ends of exhaust valve No. 1 and exhaust valve No. 2 respectively, the two sets of oxygen sensors are fixedly connected to the outer ends of the two sets of storage tanks respectively, and the oxygen sensor input ends extend to the inner ends of the storage tanks, the two sets of air pressure sensors are fixedly connected to the outer ends of the two sets of storage tanks respectively, and the air pressure sensor input ends extend to the inner ends of the storage tanks, the oxygen sensor and air pressure sensor are electrically connected to the external PLC controller, the external PLC controller is electrically connected to the external inert gas inlet pump, and the waste discharge pipe output end is connected to the external waste gas treatment device.

[0023] The above-mentioned technical solutions in the 3D metal printing hybrid screening system provided in this embodiment of the invention have at least one of the following technical effects:

[0024] 1. This device uses the low-frequency high vibration generated by the vibrating motor to move the raw materials over a wide range, promoting full contact and diffusion between new and old powders, laying the foundation for mixing. It also uses the high-frequency low vibration generated by the ultrasonic generator to effectively break up particle agglomeration, making the mixing more uniform. The coordinated use of multiple mixing methods greatly increases the efficiency and stability of mixing.

[0025] 2. This device uses a uniform spreading component to mix complex raw materials, which greatly reduces the probability of excessive screening pressure in local areas of the screen. The curved pipe actively and evenly spreads the raw materials to the screen input end, which effectively prevents the raw materials from falling directly and damaging the screen, and also prevents insufficient screening caused by local accumulation of raw materials.

[0026] 3. This device uses inert gases such as argon and nitrogen as the medium and achieves the process of "pressure replacement → closed-loop control of pressure and oxygen content" through oxygen sensors and pressure sensors. It removes air and pollutants from the chamber and maintains the target oxygen content parameter, which not only effectively suppresses the occurrence of powder explosion hazards, but also isolates the air from contact with metal powder and reduces oxidation. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This invention provides a three-dimensional 3D metal printing hybrid screening system. Figure 1 ;

[0029] Figure 2 This is a front view of a 3D metal printing hybrid screening system according to the present invention;

[0030] Figure 3 This is a perspective view of the material storage and conveying mechanism of the present invention;

[0031] Figure 4 The three-dimensional hybrid mechanism of the present invention Figure 1 ;

[0032] Figure 5 The three-dimensional hybrid mechanism of the present invention Figure 2 ;

[0033] Figure 6 This is a perspective view of the material leveling mechanism of the present invention;

[0034] Figure 7 This is a cross-sectional view of the material leveling mechanism of the present invention;

[0035] Figure 8 This is a perspective view of the reciprocating swing component of the present invention;

[0036] Figure 9 This is a partial schematic diagram of the present invention. Figure 1 ;

[0037] Figure 10 This invention provides a three-dimensional 3D metal printing hybrid screening system. Figure 2 ;

[0038] Figure 11 This is a partial schematic diagram of the present invention. Figure 2 .

[0039] The following are the labeling elements in the figure:

[0040] 1. Material conveying mechanism; 11. Material storage assembly; 111. Material storage hopper; 112. Cantilever beam load cell; 113. Gas storage tank; 114. Explosion-proof pulse solenoid valve; 115. Gas outlet pipe; 12. Unloading assembly; 121. Unloading valve; 122. Manifold tee; 2. Material leveling mechanism; 21. Mixing assembly; 211. Premixing cylinder; 212. Stirring shaft; 213. Motor No. 1; 214. Stirring paddle; 22. Uniform spreading assembly; 221. Bend; 222. Connecting plate No. 1; 223. Motor No. 2; 224. Mounting bracket; 225. Connecting plate No. 2 ; 226. No. 3 connecting plate; 3. Mixing mechanism; 31. Vibrating screen assembly; 311. Linear vibrating screen; 312. Ultrasonic generator; 313. Air injection pipe; 314. Ultrasonic transducer; 32. Discharge assembly; 321. Pneumatic butterfly valve; 322. No. 1 distribution hopper; 323. No. 2 distribution hopper; 4. Air exchange mechanism; 41. Air inlet valve; 42. No. 1 exhaust valve; 43. No. 2 exhaust valve; 44. Air inlet pipe; 45. Conveying pipe; 46. Waste discharge pipe; 47. Storage tank air inlet pipe; 48. Storage tank exhaust pipe; 49. Oxygen sensor; 40. Pressure sensor. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0042] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0045] In one embodiment of the present invention, such as Figures 1-11 As shown, a 3D metal printing mixing and screening system is provided, including a material storage and conveying mechanism 1;

[0046] It also includes a uniform feeding mechanism 2 and a mixing mechanism 3;

[0047] The material storage and conveying mechanism 1 is installed on the upper end of the material leveling mechanism 2 via an external bracket, and the mixing mechanism 3 is installed on the lower end of the material leveling mechanism 2 via an external bracket.

[0048] The material mixing mechanism 2 includes a mixing component 21 and a uniform spreading component 22. The mixing component 21 is installed on the upper end of the mixing mechanism 3, and the uniform spreading component 22 is installed on the upper end of the mixing mechanism 3.

[0049] The mixing mechanism 3 includes a vibrating screen assembly 31 and a discharge assembly 32. The vibrating screen assembly 31 is installed at the lower end of the mixing assembly 21, the discharge assembly 32 is installed at the lower end of the vibrating screen assembly 31, and a uniform spreading assembly 22 is installed at the upper end of the vibrating screen assembly 31.

[0050] In this invention, the material to be screened is added to the mixing component 21 by the material storage and conveying mechanism 1. The material to be screened is 3D metal printing powder. The mixed material is then evenly spread into the inner end of the vibrating screening component 31 by the uniform spreading component 22. After the material is screened by the vibrating screening component 31, the different materials are discharged from different outlets by the discharge component 32. By combining premixing, uniform spreading and multiple vibrating screening methods, the accuracy and stability of material screening are greatly increased.

[0051] Please see Figures 1-8 The mixing assembly 21 includes a premixing cylinder 211, a stirring shaft 212, a first motor 213, and a stirring paddle 214. The premixing cylinder 211 is installed at the lower end of the material storage and conveying mechanism 1 by an external bracket. The first motor 213 is fixedly connected to the upper end of the premixing cylinder 211. The stirring shaft 212 is rotatably connected to the upper end of the interior of the premixing cylinder 211. The output end of the first motor 213 extends to the inner end of the premixing cylinder 211 and is fixedly connected to the rotating end of the stirring shaft 212. Two sets of stirring paddles 214 are fixedly connected at symmetrical positions on the side end of the stirring shaft 212.

[0052] The lower end of the premixing cylinder 211 is a conical cylinder, and the outer end of the stirring paddle 214 is a conical structure adapted to the inner end of the conical cylinder;

[0053] The uniform spreading component 22 includes a bent pipe 221, a second motor 223, a mounting frame 224, and a reciprocating swing component. The bent pipe 221 is installed on the upper end of the vibrating screening component 31, the mounting frame 224 is installed on the upper end of the vibrating screening component 31, the input end of the bent pipe 221 is rotatably connected to the output end of the premixing cylinder 211, the second motor 223 is fixedly connected to the upper end of the mounting frame 224, and the reciprocating swing component is installed on the lower end of the mounting frame 224.

[0054] The reciprocating swing assembly includes a first connecting plate 222, a second connecting plate 225, and a third connecting plate 226. The output end of the second motor 223 extends to the lower end of the mounting bracket 224 and is fixedly connected to the upper end of one end of the first connecting plate 222. The lower end of the other end of the first connecting plate 222 is rotatably connected to one end of the upper end of the second connecting plate 225. The side end of one end of the third connecting plate 226 is fixedly connected to the side end of the bend 221. The upper end of the other end of the third connecting plate 226 is rotatably connected to the lower end of the second connecting plate 225 away from the first connecting plate 222.

[0055] In this invention, the first motor 213 drives the stirring shaft 212 to rotate, thereby driving the stirring paddle 214 on the stirring shaft 212 to stir and mix the new and old raw materials, so as to premix them before spreading them and prevent excessive local screening pressure.

[0056] The second motor 223 drives the first connecting plate 222 to rotate, which in turn drives the second connecting plate 225 to rotate at one end, which in turn drives the other end of the second connecting plate 225 to reciprocate with the third connecting plate 226 connected to the other end of the second connecting plate 225. This causes the bent pipe 221 to rotate regularly, evenly spreading the premixed raw material on the input end of the vibrating screen component 31. This active material spreading method effectively avoids the vibrating screen component 31 from being overloaded locally, resulting in incomplete screening. It also allows the raw material to be buffered by the inclined surface of the bent pipe 221 and slowly slide down, preventing the raw material from falling directly into the input end of the vibrating screen component 31 and damaging the screen.

[0057] Please see Figures 1-9The vibrating screen assembly 31 includes a linear vibrating screen 311, an ultrasonic generator 312, an air injection pipe 313, and an ultrasonic transducer 314. The bend 221 is located at the upper end of the input end of the linear vibrating screen 311. The ultrasonic generator 312 is fixedly connected to the side end of the linear vibrating screen 311. The ultrasonic transducer 314 is fixedly connected to the inner end of the linear vibrating screen 311. The output end of the ultrasonic generator 312 is fixedly connected to the input end of the ultrasonic transducer 314 through a wire passing through the outer end of the linear vibrating screen 311. Two sets of air injection pipes 313 are fixedly connected to symmetrical positions on the side end of the linear vibrating screen 311. The mounting bracket 224 is fixedly connected to the upper end of the linear vibrating screen 311.

[0058] The discharge assembly 32 includes a pneumatic butterfly valve 321, a first distribution hopper 322, and a second distribution hopper 323. The first distribution hopper 322 is fixedly connected to the first output end of the linear vibrating screen 311, the second distribution hopper 323 is fixedly connected to the second output end of the linear vibrating screen 311, and the pneumatic butterfly valve 321 is fixedly connected to the output end of the second distribution hopper 323.

[0059] In this invention, an inert gas (such as argon) is injected into the linear vibrating screen 311 through the gas injection pipe 313. The ultrasonic generator 312 generates high frequency and high voltage, which is transmitted to the ultrasonic transducer 314 to generate high frequency resonance. Through the combined effect of the low frequency and high vibration of the linear vibrating screen 311 and the high frequency and low vibration of the ultrasonic transducer 314, the mixing and screening effect of the raw materials is effectively increased. The metal powder completes secondary mixing and screening in the inert gas (such as argon) protective environment. The inert gas protective environment in the linear vibrating screen 311 can effectively prevent the metal powder from oxidizing and can effectively suppress powder explosion.

[0060] The raw materials screened out are collected centrally through the conical structure of the No. 1 distribution hopper 322 and the No. 2 distribution hopper 323. Unqualified raw materials that agglomerate will fall into the No. 1 distribution hopper 322, while qualified raw materials that can pass through the screen of the linear vibrating screen 311 will fall into the No. 2 distribution hopper 323. The opening and closing and flow rate of the qualified finished product outlet are controlled by the pneumatic butterfly valve 321.

[0061] Please see Figures 1-11The material storage and conveying mechanism 1 includes a material storage assembly 11 and a material unloading assembly 12. The material storage assembly 11 includes a material storage hopper 111, a cantilever beam load cell 112, a gas storage tank 113, an explosion-proof pulse solenoid valve 114, and a gas outlet pipe 115. Two sets of material storage hoppers 111 are located symmetrically at the upper end of the premixing cylinder 211. Multiple sets of cantilever beam load cells 112, supported by external brackets, are fixedly connected to the symmetrical positions of the four corners at the lower end of the material storage hopper 111. A gas storage tank 113 is fixedly connected to the side end of the material storage hopper 111. An explosion-proof pulse solenoid valve 114 is fixedly connected to the upper end of the material storage hopper 111. The input end of the explosion-proof pulse solenoid valve 114 is fixedly connected to the output end of the gas storage tank 113. The output end of the explosion-proof pulse solenoid valve 114 is fixedly connected to the gas input end of the material storage hopper 111. A gas outlet pipe 115 is fixedly connected to the side end of the material storage hopper 111.

[0062] The unloading assembly 12 includes an unloading valve 121 and a manifold tee 122. The unloading valve 121 is fixedly connected to the output end of the storage tank 111. The first input end and the second input end of the manifold tee 122 are respectively fixedly connected to the output ends of the two sets of unloading valves 121. The output end of the manifold tee 122 is fixedly connected to the input end of the premixing cylinder 211. The premixing cylinder 211 is fixedly connected to the lower end of the manifold tee 122 by an external bracket.

[0063] In this invention, two sets of storage bins 111 are used to store used old raw materials and new raw materials respectively. They are connected to an external PLC controller through cantilever beam weighing sensors 112. The total weight of the storage bins 111 and the raw materials to be screened is determined by the sum of the weighing of multiple sets of cantilever beam weighing sensors 112. The opening and closing of the discharge valve 121 is then controlled according to the total weight, so that the two sets of storage bins 111 can accurately discharge materials in different proportions according to the specific metal type and use. The materials are then mixed together in the premixing cylinder 211 through the manifold tee pipe 122.

[0064] Both sets of storage tanks 111 have built-in filter elements (not shown in the figure). The gas filtered by the filter element in the storage tank 111 is discharged from the gas outlet pipe 115. The filter element can be backflushed and cleaned by the inert gas (such as argon) stored in the gas storage tank 113 through the explosion-proof pulse solenoid valve 114.

[0065] Please refer to Figures 1-11The ventilation mechanism 4 includes an intake valve 41, a first exhaust valve 42, a second exhaust valve 43, an intake pipe 44, a conveying pipe 45, a waste discharge pipe 46, a storage tank intake pipe 47, a storage tank exhaust pipe 48, an oxygen sensor 49, and a pressure sensor 40. The output end of the intake pipe 44 is fixedly connected to the port of a set of injection pipes 313, and the input end of the intake pipe 44 is fixedly connected to an external inert gas intake pump (not shown in the figure). The storage tank intake pipe 47 is fixedly connected to the outer end of the storage tank 111, and the storage tank exhaust pipe 48 is fixedly connected to the outer end of the storage tank 111. The input end of the conveying pipe 45 is fixedly connected to the port of another set of injection pipes 313, and the output end of the conveying pipe 45 is fixedly connected to the ports of the two sets of storage tank intake pipes 47. The storage tank exhaust pipe 48... The port is fixedly connected to a waste discharge pipe 46, an air inlet pipe 44 is fixedly connected to both ends of an air inlet valve 41, two sets of storage tank exhaust pipes 48 are fixedly connected to both ends of exhaust valve 42 and exhaust valve 43 respectively, two sets of oxygen sensors 49 are fixedly connected to the outer ends of two sets of storage tanks 111 respectively and the input end of oxygen sensor 49 extends to the inner end of storage tank 111, two sets of pressure sensors 40 are fixedly connected to the outer ends of two sets of storage tanks 111 respectively and the input end of pressure sensor 40 extends to the inner end of storage tank 111, oxygen sensor 49 and pressure sensor 40 are electrically connected to an external PLC controller (not shown in the figure), the external PLC controller is electrically connected to an external inert gas intake pump, and the output end of waste discharge pipe 46 is connected to an external waste gas treatment device (not shown in the figure).

[0066] In this invention, by opening the inlet valve 41, the first exhaust valve 42 and the second exhaust valve 43, inert gas enters the linear vibrating screen 311 through the inlet pipe 44 and then enters the storage tank 111 through the conveying pipe 45 and the storage tank inlet pipe 47. By continuously filling inert gas, the air inside the storage tank 111 is discharged from the waste pipe 46 through the storage tank exhaust pipe 48. The oxygen content and air pressure inside the storage tank 111 are monitored by the oxygen sensor 49 and the air pressure sensor 40. Then, the external inert gas inlet pump is automatically increased by the external PLC controller, and the oxygen concentration is reduced to switch to a small flow rate to maintain pressure, so as to balance the protection effect and the gas utilization rate.

[0067] It can also maintain a slightly positive air pressure through an external PLC controller to prevent external gas from seeping in. When the pressure is too high, it can automatically release pressure by opening exhaust valve 42 and exhaust valve 43.

[0068] Please see Figures 1-11 In this invention, the switches of motor 213, motor 223, linear vibrating screen 311 and ultrasonic generator 312 are electrically connected to an external PLC controller to achieve remote control start and stop.

[0069] The cantilever beam load cell 112, the premixing cylinder 211, and the linear vibrating screen 311 are all fixedly connected to an external support (not shown in the figure).

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A material storage and conveying mechanism, characterized in that: It also includes a uniform material distribution mechanism, a mixing mechanism, and a ventilation mechanism; The material storage and conveying mechanism is installed on the upper end of the material leveling mechanism via an external bracket, and the mixing mechanism is installed on the lower end of the material leveling mechanism via an external bracket. The material mixing mechanism includes a mixing component and a uniform spreading component. The mixing component is installed at the upper end of the mixing mechanism, and the uniform spreading component is installed at the upper end of the mixing mechanism. The mixing mechanism includes a vibrating screening component and a discharge component. The vibrating screening component is installed at the lower end of the mixing component, the discharge component is installed at the lower end of the vibrating screening component, and a uniform spreading component is installed at the upper end of the vibrating screening component. The ventilation mechanism is installed at the outer end of the material storage and conveying mechanism.

2. The 3D metal printing hybrid screening system according to claim 1, characterized in that, The mixing assembly includes a premixing cylinder, a stirring shaft, a No. 1 motor, and stirring paddles. The premixing cylinder is installed at the lower end of the storage and conveying mechanism via an external bracket. The No. 1 motor is fixedly connected to the upper end of the premixing cylinder. The stirring shaft is rotatably connected to the upper end inside the premixing cylinder. The output end of the No. 1 motor extends to the inner end of the premixing cylinder and is fixedly connected to the rotating end of the stirring shaft. Two sets of stirring paddles are fixedly connected at symmetrical positions on the side end of the stirring shaft.

3. The 3D metal printing hybrid sieving system according to claim 2, characterized in that, The lower end of the premixing cylinder is a conical cylinder, and the outer end of the stirring paddle is a conical structure that matches the inner end of the conical cylinder.

4. The 3D metal printing hybrid sieving system according to claim 3, characterized in that, The uniform spreading assembly includes a bent pipe, a second motor, a mounting frame, and a reciprocating oscillating assembly. The bent pipe is installed on the upper end of the vibrating screening assembly, the mounting frame is installed on the upper end of the vibrating screening assembly, the input end of the bent pipe is rotatably connected to the output end of the premixing cylinder, the second motor is fixedly connected to the upper end of the mounting frame, and the reciprocating oscillating assembly is installed on the lower end of the mounting frame.

5. The 3D metal printing hybrid screening system according to claim 4, characterized in that, The reciprocating swing assembly includes a first connecting plate, a second connecting plate, and a third connecting plate. The output end of the second motor extends to the lower end of the mounting bracket and is fixedly connected to the upper end of one end of the first connecting plate. The lower end of the other end of the first connecting plate is rotatably connected to the upper end of the second connecting plate. The side end of one end of the third connecting plate is fixedly connected to the side end of the bend pipe. The upper end of the other end of the third connecting plate is rotatably connected to the lower end of the second connecting plate, away from the first connecting plate.

6. The 3D metal printing hybrid sieving system according to claim 5, characterized in that, The vibrating screen assembly includes a linear vibrating screen, an ultrasonic generator, an air injection pipe, and an ultrasonic transducer. The bend is located at the upper end of the input end of the linear vibrating screen. The ultrasonic generator is fixedly connected to the side end of the linear vibrating screen, and the ultrasonic transducer is fixedly connected to the inner end of the linear vibrating screen. The output end of the ultrasonic generator is fixedly connected to the input end of the ultrasonic transducer through a wire passing through the outer end of the linear vibrating screen. Two sets of air injection pipes are fixedly connected at symmetrical positions on the side end of the linear vibrating screen, and the mounting bracket is fixedly connected to the upper end of the linear vibrating screen.

7. The 3D metal printing hybrid sieving system according to claim 6, characterized in that, The discharge assembly includes a pneumatic butterfly valve, a first discharge hopper, and a second discharge hopper. The first discharge hopper is fixedly connected to the first output end of the linear vibrating screen, the second discharge hopper is fixedly connected to the second output end of the linear vibrating screen, and the pneumatic butterfly valve is fixedly connected to the output end of the second discharge hopper.

8. The 3D metal printing hybrid sieving system according to claim 7, characterized in that, The material storage and conveying mechanism includes a material storage component and a material unloading component. The material storage component includes a material storage hopper, a cantilever beam load cell, a gas storage tank, an explosion-proof pulse solenoid valve, and a gas outlet pipe. Two sets of material storage hoppers are located symmetrically at the upper end of the premixing cylinder. Multiple sets of cantilever beam load cells supported by external brackets are fixedly connected to the symmetrical positions at the four corners of the lower end of the material storage hopper. A gas storage tank is fixedly connected to the side end of the material storage hopper. An explosion-proof pulse solenoid valve is fixedly connected to the upper end of the material storage hopper. The input end of the explosion-proof pulse solenoid valve is fixedly connected to the output end of the gas storage tank. The output end of the explosion-proof pulse solenoid valve is fixedly connected to the gas input end of the material storage hopper. A gas outlet pipe is fixedly connected to the side end of the material storage hopper.

9. The 3D metal printing hybrid sieving system according to claim 8, characterized in that, The unloading assembly includes an unloading valve and a manifold tee. The unloading valve is fixedly connected to the output end of the storage tank. The first and second input ends of the manifold tee are respectively fixedly connected to the output ends of the two sets of unloading valves. The output end of the manifold tee is fixedly connected to the input end of the premixing cylinder. The premixing cylinder is fixedly connected to the lower end of the manifold tee through an external bracket.

10. The 3D metal printing hybrid sieving system according to claim 9, characterized in that, The ventilation mechanism includes an intake valve, a first exhaust valve, a second exhaust valve, an intake pipe, a delivery pipe, a waste discharge pipe, an intake pipe for the storage tank, an exhaust pipe for the storage tank, an oxygen sensor, and a pressure sensor. The output end of the intake pipe is fixedly connected to the port of a set of injection pipes, and the input end of the intake pipe is fixedly connected to an external inert gas pump. The intake pipe for the storage tank is fixedly connected to the outer end of the storage tank, and the exhaust pipe for the storage tank is fixedly connected to the outer end of the storage tank. The input end of the delivery pipe is fixedly connected to the port of another set of injection pipes, and the output end of the delivery pipe is fixedly connected to the ports of the two sets of intake pipes for the storage tanks, and the port of the exhaust pipe for the storage tank is also fixedly connected to the storage tank. The system is equipped with a waste discharge pipe, an air inlet pipe, and two sets of storage tank exhaust pipes, which are respectively fixedly connected to the ends of exhaust valves 1 and 2. Two sets of oxygen sensors are respectively fixedly connected to the outer ends of the two storage tanks, with the input ends of the oxygen sensors extending to the inner ends of the storage tanks. Two sets of air pressure sensors are respectively fixedly connected to the outer ends of the two storage tanks, with the input ends of the air pressure sensors extending to the inner ends of the storage tanks. The oxygen sensors and air pressure sensors are electrically connected to an external PLC controller, which is electrically connected to an external inert gas intake pump. The output end of the waste discharge pipe is connected to an external waste gas treatment device.

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