Miniaturized atomization pulverizing device and method suitable for laboratory environment

Abstract

The invention discloses a miniaturized atomization powdering device and method suitable for a laboratory environment. The device comprises a supporting frame, a needling instrument, a heating coil, an air compressor, an ultrasonic generator and a vibration plate, and the needling instrument is vertically installed on the supporting frame; the heating coil is wound on the needling instrument; the air compressor is communicated with the needling instrument through a pipeline; and the vibrating plate is inserted into the high-frequency connecting socket of the ultrasonic generator and is positioned right below the needling instrument. According to the needle, molten metal is guided into the vibration plate, the parameter coupling limitation of traditional continuous liquid flow atomization is broken through through the coupling action mechanism of single liquid drop impact and ultrasonic vibration, quantitative correlation of metal powder characteristics and technological parameters is achieved, meanwhile, thermal shock of high temperature to an ultrasonic generator is reduced, and the service life of a core component is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of atomization powder making, and more particularly to a miniaturized atomization powder making device and method suitable for laboratory environments. Background Art

[0002] Metal atomization powder making technology is one of the core processes for additive manufacturing, electronic packaging and high-end material preparation. Its core goal is to prepare micron-sized metal powders with high sphericity, narrow particle size distribution and low oxygen content. Although traditional atomization technologies (such as gas atomization and centrifugal atomization) have been industrially applied, they still have significant defects: gas atomization relies on high-speed airflow to break up the molten metal, which can easily lead to powder oxidation and a wide particle size distribution (usually spanning tens of microns); although centrifugal atomization can improve particle uniformity, the equipment is complex and has stringent requirements on the thermal stability of high-temperature melts, making it difficult to adapt to miniaturized design and laboratory scene requirements. As the requirements for powder properties (such as precise control of particle size and shape consistency) in fields such as 3D printing and microelectronics solders become increasingly stringent, the bottlenecks of existing technologies are becoming more and more prominent.

[0003] In recent years, ultrasonic atomization technology has attracted much attention due to its advantages of achieving direct crushing without a medium through the standing wave effect and excellent particle sphericity (roundness > 95%). It is particularly suitable for high-quality powder production of low-melting-point metals such as tin and indium. However, the industrial application of traditional ultrasonic atomization equipment faces two major constraints: First, the ultrasonic tool head is prone to thermal fatigue and surface wear due to long-term contact with high-temperature melt (> 300°C), resulting in a decrease in atomization efficiency and the risk of metal contamination; second, existing equipment relies on continuous metal liquid flow atomization, which is poorly adapted for small-scale experimental research and cannot achieve accurate correlation analysis between the dynamic behavior of single droplets and atomization parameters (such as critical Weber number and impact frequency); in addition, although the ultrasonic vibration atomization chamber proposed in patent CN16856250A attempts to optimize the structural design, its process is still based on macroscopic liquid film breakage and lacks controllability over the microscopic droplet dynamics mechanism, making it difficult to meet the demand for active regulation of particle morphology and size in the development of functional materials.

[0004] Therefore, providing a miniaturized atomization powder making device and method suitable for laboratory environment is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a miniaturized atomization powder making device and method suitable for laboratory environment, so as to solve at least one of the problems mentioned in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A miniaturized atomization powder making device suitable for laboratory environments includes a support frame, a needle, a heating coil, an air compressor, an ultrasonic generator and a vibration plate. The needle is vertically mounted on the support frame; the heating coil is wound around the needle; the air compressor is connected to the needle through a pipeline; and the vibration plate is inserted into the high-frequency connection socket of the ultrasonic generator and is located directly below the needle.

[0008] By adopting the above technical solution, the beneficial effects of the present invention are:

[0009] The needle guides the molten metal into the vibration plate. Through the coupling mechanism of single droplet impact and ultrasonic vibration, it breaks through the parameter coupling limitations of traditional continuous liquid flow atomization, realizes the quantitative correlation between metal powder properties and process parameters, and at the same time reduces the thermal shock of high temperature on the ultrasonic generator, thereby extending the life of core components.

[0010] Furthermore, the needle tool includes a syringe and a needle, the syringe is vertically installed on the support frame; the heating coil is wound around the syringe; the air compressor is connected to the top of the syringe through a pipeline; the needle is detachably connected to the syringe.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the diameter of the metal powder can be controlled by changing the diameter of the needle to meet different initial metal droplet sizes, preparing for subsequent ultrasonic crushing.

[0012] Furthermore, it also includes an elevator, the support frame is U-shaped, one end of the support frame is fixedly connected to the lifting platform of the elevator, and the other end of the support frame is fixedly connected to the syringe.

[0013] The beneficial effect of adopting the above-mentioned further technical solution is that the height of the syringe, that is, the distance between the syringe and the vibration plate can be controlled, thereby achieving a better atomization height effect.

[0014] Furthermore, the lift is a manual screw lift.

[0015] Furthermore, the miniaturized atomization powder making device suitable for laboratory environment also includes a pressure regulator, the air compressor is connected to the pressure regulator through an air inlet pipe, and the pressure regulator is connected to the top of the syringe through an air outlet pipe.

[0016] The beneficial effect of adopting the above-mentioned further technical solution is that it can meet the needs of replacing needles with smaller diameters, further reduce the initial diameter of the molten droplets, and ensure the efficiency of atomization.

[0017] Furthermore, it also includes a temperature controller, which is electrically connected to the heating coil through a wire.

[0018] Furthermore, it also includes a nebulizer box, the top of which has a through hole; one end of the support frame connected to the needle passes through the through hole and extends to the inside of the nebulizer box; the temperature controller is installed on the top of the nebulizer box.

[0019] A method, using a miniaturized atomization powder making device suitable for a laboratory environment as described above, comprises the following steps:

[0020] First, lift the lift platform to a suitable height, place the metal block in the syringe, heat the metal block with the heating coil, and turn on the ultrasonic generator at the same time to drive the vibration plate to vibrate at high frequency. When the metal superheat degree is met, turn on the air compressor and adjust the pressure in the syringe through the pressure regulator to meet the different flow rates of the metal melt. The metal melt flows out through the needle and falls on the vibration plate. The high-frequency vibration of the vibration plate is used to atomize and powder the droplets. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 The accompanying drawing is a schematic structural diagram of a miniaturized atomization powder making device suitable for laboratory environments provided by the present invention. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figure 1As shown, an embodiment of the present invention discloses a miniaturized atomization powder making device suitable for a laboratory environment, comprising a support frame 1, a needle 2, a heating coil 3, an air compressor 4, an ultrasonic generator 5 and a vibration plate 6. The needle 2 is vertically mounted on the support frame 1; the heating coil 3 is wound around the needle 2; the air compressor 4 is connected to the needle 2 through a pipeline; and the vibration plate 6 is plugged into the high-frequency connection socket of the ultrasonic generator 5 and is located directly below the needle 2. The needle 2 of the present invention guides the molten metal into the vibration plate 6, and through the coupling mechanism of single droplet impact and ultrasonic vibration, breaks through the parameter coupling limitation of traditional continuous liquid flow atomization, realizes the quantitative correlation between metal powder characteristics and process parameters, and at the same time reduces the thermal shock of high temperature on the ultrasonic generator, extending the life of the core components.

[0025] Specifically, the needle 2 includes a syringe and a needle, and the syringe is vertically installed on the support frame 1; the heating coil 3 is wound around the syringe. In this embodiment, the heating coil 3 can be fixed on the syringe, and the syringe is made of high-temperature resistant material; the air compressor 4 is connected to the top of the syringe through a pipeline; the needle and the syringe are detachably connected, so that the size of the needle can be changed to meet different initial metal droplet sizes, prepare for subsequent ultrasonic crushing, and control the diameter of the metal powder.

[0026] Among them, the detachable connection methods include threaded connection, snap connection, etc., as long as the detachable connection can be achieved.

[0027] In order to further optimize the technical solution of the present invention, a lift 7 is also included. In this embodiment, the lift 7 is a manual screw lift, the support frame 1 is U-shaped, one end of the support frame 1 is fixedly connected to the lifting platform of the lift 7, and the other end of the support frame 1 is fixedly connected to the syringe. Therefore, by operating the lift 7, the height of the syringe, that is, the distance between it and the vibration plate 6, can be adjusted, thereby achieving a better atomization height effect.

[0028] In order to further optimize the technical solution of the present invention, a miniaturized atomization powder making device suitable for laboratory environment also includes a pressure regulator 8. The air compressor 4 is connected to the pressure regulator 8 through an air inlet pipe, and the pressure regulator 8 is connected to the top of the syringe through an air outlet pipe, so as to meet the needs of replacing needles with smaller diameters, further reduce the initial diameter of the molten droplet, and ensure the efficiency of atomization.

[0029] In order to further optimize the technical solution of the present invention, a temperature controller 9 is further included. The temperature controller is electrically connected to the heating coil 3 through a wire to control and monitor the heating temperature in real time.

[0030] Specifically, it also includes a nebulizer box 10, which has a through hole on the top; one end of the support frame 1 connected to the needle 2 passes through the through hole and extends into the inside of the nebulizer box 10; and the temperature controller 9 is installed on the top of the nebulizer box 10.

[0031] An embodiment of the present invention further discloses a method, which is performed using the miniaturized atomization powder making device suitable for a laboratory environment as described above, and includes the following steps:

[0032] First, lift the lifting platform of the elevator 7 to a suitable height, and place the metal block into the syringe. The heating coil 3 heats the metal block, and at the same time, turn on the ultrasonic generator 5 to drive the vibration plate 6 to vibrate at high frequency. When the metal superheat degree is met, turn on the air compressor 4, and adjust the pressure in the syringe through the pressure regulator 8 to meet the different flow rates of the metal melt. The metal melt flows out through the needle and falls on the vibration plate 6. The high-frequency vibration of the vibration plate 6 is used to atomize and powder the droplets.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0034] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A miniaturized atomization powder making device suitable for laboratory environment, characterized in that: It includes a support frame, a needle, a heating coil, an air compressor, an ultrasonic generator and a vibration plate. The needle is vertically installed on the support frame; the heating coil is wound around the needle; the air compressor is connected to the needle through a pipeline; the vibration plate is inserted into the high-frequency connection socket of the ultrasonic generator and is located directly below the needle.

2. A miniaturized atomization powder making device suitable for laboratory environment according to claim 1, characterized in that: The needle tool includes a syringe and a needle, the syringe is vertically installed on the support frame; the heating coil is wound around the syringe; the air compressor is connected to the top of the syringe through a pipeline; the needle is detachably connected to the syringe.

3. A miniaturized atomization powder making device suitable for laboratory environment according to claim 2, characterized in that: It also includes an elevator, the support frame is U-shaped, one end of the support frame is fixedly connected to the lifting platform of the elevator, and the other end of the support frame is fixedly connected to the syringe.

4. A miniaturized atomization powder making device suitable for laboratory environment according to claim 3, characterized in that: The lift is a manual screw lift.

5. The miniaturized atomization powder making device suitable for laboratory environment according to claim 2, characterized in that: The miniaturized atomization powder making device suitable for laboratory environment also includes a pressure regulator. The air compressor is connected to the pressure regulator through an air inlet pipe, and the pressure regulator is connected to the top of the syringe through an air outlet pipe.

6. A miniaturized atomization powder making device suitable for laboratory environment according to claim 1, characterized in that: It also includes a temperature controller, which is electrically connected to the heating coil through a wire.

7. A miniaturized atomization powder making device suitable for laboratory environment according to claim 6, characterized in that: It also includes a nebulizer box, which has a through hole on the top; one end of the support frame connected to the needle passes through the through hole and extends to the inside of the nebulizer box; the temperature controller is installed on the top of the nebulizer box.

8. A method, using a miniaturized atomization powder making device suitable for laboratory environment according to any one of claims 1 to 7, characterized in that: The following steps are involved: First, lift the lift platform to a suitable height, place the metal block in the syringe, heat the metal block with the heating coil, and turn on the ultrasonic generator at the same time to drive the vibration plate to vibrate at high frequency. When the metal superheat degree is met, turn on the air compressor and adjust the pressure in the syringe through the pressure regulator to meet the different flow rates of the metal melt. The metal melt flows out through the needle and falls on the vibration plate. The high-frequency vibration of the vibration plate is used to atomize and powder the droplets.

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