Device for removing irregular particles in spherical powder
By designing a device that includes a material separation tank and a vibration component, irregular particles in spherical powder are efficiently removed by utilizing high-frequency vibration and angle adjustment, thereby improving the spheroidization rate and powder quality and solving the problem of poor spheroidization effect in the prior art.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-03-03
AI Technical Summary
Existing technologies struggle to efficiently remove irregular particles from spherical powders, resulting in poor spheroidization and impacting the therapeutic effects of silica glass microspheres.
A device comprising a material separation tank, an angle adjustment component, and a vibration component is used to separate spherical particles and irregular particles by means of high-frequency vibration and angle adjustment. The spherical particles slide off, while the irregular particles remain in the tank.
It improves the sphericity of spherical powder, enhances powder flowability and bulk density, simplifies the testing process, and reduces labor and time costs.
Smart Images
Figure CN223960059U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder sieving technology, and in particular to a device for removing irregular particles from spherical powder. Background Technology
[0002] Silica is a common component of glass ceramics, and silica glass microspheres play a vital role in the medical field. The quality of spheroidization directly affects the therapeutic efficacy of these microspheres. Therefore, removing irregular particles from spherical powder is one of the key factors influencing the success of spheroidization.
[0003] Currently, the main methods for separating spherical powders include dry sieving and inclined plane separation. Dry sieving is only suitable when there is a significant difference in particle size between irregular particles and spherical powders; it is difficult to effectively separate spherical powders and irregular particles with similar particle sizes. Inclined plane separation relies on the difference in force and motion characteristics between spherical and irregular particles on a fixed inclined plane. The powder is poured onto a rough plate with a certain angle, and separation is achieved solely by allowing spherical particles to roll off while irregular particles remain on the plate. However, this method suffers from poor separation efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a device for removing irregular particles from spherical powder, which can efficiently remove some irregular particles that have not been spherized or have poor spherization effect from the spherical particles, thereby improving the spherization rate.
[0005] To achieve the above objectives, this utility model provides a device for removing irregular particles from spherical powder, including a material separation tank, an angle adjustment component, and a vibration component. The material separation tank is disposed on the angle adjustment component, which is used to adjust the tilt angle of the material separation tank. The angle adjustment component is disposed on the vibration component, which is used to drive the angle adjustment component and the material separation tank to vibrate. A discharge port is provided at the end of the material separation tank.
[0006] Optionally, the angle adjustment assembly includes a fixed plate and a mounting plate. The fixed plate is horizontally disposed on the vibration assembly, and the mounting plate is rotatably disposed on the fixed plate. The included angle between the mounting plate and the fixed plate is adjustable, and the material separation tank is fixed on the mounting plate.
[0007] Optionally, one end of the mounting plate is rotatably connected to one end of the fixed plate. The angle adjustment assembly further includes a screw-slider mechanism and a connecting rod. The screw-slider mechanism includes a ball screw and a slider. The ball screw is rotatably mounted on the fixed plate. The slider is slidably connected to the fixed plate. The two ends of the connecting rod are rotatably connected to the slider and the mounting plate, respectively. By rotating the ball screw, the slider can be driven to slide horizontally, thereby driving the other end of the mounting plate to rotate relative to the fixed plate through the connecting rod.
[0008] Optionally, the end of the ball screw is provided with a screw handle.
[0009] Optionally, the fixing plate is provided with a groove along the axial direction parallel to the ball screw, and the slider is slidably disposed in the groove.
[0010] Optionally, the angle between the mounting plate and the fixing plate can be adjusted from 0° to 60°.
[0011] Optionally, the vibration assembly includes a support frame and a vibration unit, wherein the support frame is fixed on the vibration unit and the fixing plate is fixed on the support frame.
[0012] Optionally, the material separation tank includes a sliding plate and two baffles, with the two baffles respectively disposed on opposite sides of the sliding plate.
[0013] Optionally, the discharge port is a long, narrow, obliquely downward-extending opening, and the cross-section of the discharge port along the length direction perpendicular to the material separation tank is a right-angled triangle.
[0014] Optionally, the surface roughness of both the material separation tank and the discharge port is less than 0.2 μm.
[0015] The apparatus for removing irregular particles from spherical powder provided by this invention has at least the following effective effects:
[0016] 1) The high-frequency vibration of the vibration component spreads the powder on the material separation tank, and the vibration imparts different kinetic energies to particles of different shapes. When spherical and irregular particles roll on the inclined material separation tank, the resistance generated is small due to the point contact between the spherical particles and the material separation tank. Under the action of the component of the particle's gravity along the inclination direction of the material separation tank, the kinetic energy gradually increases and it slides down the material separation tank, finally sliding out from the discharge port for collection. For irregular particles, the contact surface between them and the material separation tank is larger, generating greater resistance. Therefore, irregular particles cannot obtain sufficient kinetic energy and remain in the material separation tank. This design can efficiently remove some irregular particles that have not been spherically shaped or have poor spheroidization effects from the spherical particles, thereby improving the spheroidization rate of the spherical powder, and thus improving the powder's flowability and bulk density.
[0017] 2) Since the tilt angle of the material separation tank is adjustable, it can meet the screening requirements of particles of different sizes.
[0018] 3) The structure is simple and the design is reasonable. The material separation tank with high-frequency vibration is used to distinguish the spherical particles. It can efficiently check the sphericity of spherical powder in batches, reduce the manpower and time costs of testing, and has extremely high testing efficiency and accuracy, while ensuring product quality.
[0019] 4) It is easy to operate and can not only remove irregular particles from small batches of spherical powder, but also be made into a large-size device for use in powder production lines. Attached Figure Description
[0020] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:
[0021] Figure 1 A schematic diagram of an apparatus for removing irregular particles from spherical powder according to an embodiment of the present invention;
[0022] Figure 2 A microscopic image of silica powder before processing, taken using an optical microscope, is provided as an embodiment of this utility model.
[0023] Figure 3 A microscopic image of silica powder after removing irregular particles, provided in an embodiment of the present invention;
[0024] Figure 4 Microscopic image of the removed irregular particles provided in an embodiment of this utility model.
[0025] in:
[0026] 100-Material separation tank; 110-Discharge port; 210-Fixing plate; 220-Mounting plate; 230-Ball screw; 240-Slider; 250-Connecting rod; 310-Support frame; 320-Vibration unit; 400-Collection container. Detailed Implementation
[0027] To make the objectives, advantages, and features of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are in a very simplified form and use non-precise proportions, intended only to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Please refer to the accompanying drawings for a clearer understanding of the objectives, features, and advantages of this utility model. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes and to enable those skilled in the art to understand and read the content disclosed in the specification. They are not intended to limit the implementation conditions of this utility model. Any modifications to the structure, changes in proportions, or adjustments to the size, provided they produce the same or similar effects and achieve the same objectives as this utility model, should still fall within the scope of the technical content disclosed in this utility model.
[0028] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects unless otherwise expressly indicated. As used in this invention, the term “or” is generally used to include “and / or” unless otherwise expressly indicated. As used in this invention, the term “a number” is generally used to include “at least one” unless otherwise expressly indicated. As used in this invention, the term “at least two” is generally used to include “two or more” unless otherwise expressly indicated. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature.
[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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 this utility model based on the specific circumstances.
[0030] Please refer to Figure 1 This embodiment provides an apparatus for removing irregular particles from spherical powder, including a material separation tank 100, an angle adjustment component, and a vibration component. The material separation tank 100 is disposed on the angle adjustment component, which is used to adjust the tilt angle of the material separation tank 100. The angle adjustment component is disposed on the vibration component, which is used to drive the angle adjustment component and the material separation tank 100 to vibrate. A discharge port 110 is provided at the end of the material separation tank 100.
[0031] The working principle of this utility model is as follows:
[0032] The high-frequency vibration of the vibration component spreads the spherical powder on the material separation tank 100. The vibration imparts different kinetic energies to particles of different shapes. As spherical and irregular particles roll on the inclined material separation tank 100, the point contact between the spherical particles and the tank results in less resistance. Under the influence of the component of gravity along the inclination of the tank, the kinetic energy gradually increases, causing the particles to slide down the tank and finally exit through the discharge port 110 for collection. However, for irregular particles, the larger contact area with the tank results in greater resistance, causing them to remain inside the tank due to insufficient kinetic energy. This design efficiently removes irregular particles that are not spherically shaped or poorly spherically shaped from the spherical particles, thereby improving the spheroidization rate of the powder and thus increasing its flowability and bulk density.
[0033] In this embodiment, the average particle size of the spherical powder is, for example, 15-40 μm. The spherical powder can be selected from non-metallic powder or metallic powder, and this utility model does not limit it.
[0034] Preferably, the spherical powder includes irregular particles and spherical particles, with the spherical particles accounting for a larger mass ratio of the spherical powder to maintain the flowability of the powder particles.
[0035] Preferably, the irregular particles include at least one of the following: flaky particles, quasi-spherical particles, hemispherical particles, etc.
[0036] In this embodiment, the angle adjustment component includes a fixed plate 210 and a mounting plate 220. The fixed plate 210 is horizontally mounted on the vibration component, and the mounting plate 220 is rotatably mounted on the fixed plate 210. The included angle between the mounting plate 220 and the fixed plate 210 is adjustable. The material separation tank 100 is fixed on the mounting plate 220. For example, the fixed plate 210 can be fixed to the support frame 310 of the vibration component by means of a threaded connection, and the bottom surface of the material separation tank 100 can be fixed to the mounting plate 220 by means of welding, bonding, etc.
[0037] Preferably, one end of the mounting plate 220 is rotatably connected to one end of the fixed plate 210. The angle adjustment assembly further includes a screw-slider mechanism and a connecting rod 250. The screw-slider mechanism includes a ball screw 230 and a slider 240. The ball screw 230 is rotatably mounted on the fixed plate 210, and the slider 240 is slidably connected to the fixed plate 210. The two ends of the connecting rod 250 are rotatably connected to the slider 240 and the mounting plate 220, respectively. By rotating the ball screw 230, the slider 240 can be driven to slide horizontally, thereby causing the other end of the mounting plate 220 to rotate relative to the fixed plate 210 via the connecting rod 250. In this embodiment, one end of the mounting plate 220 and one end of the fixed plate 210 can be rotatably connected by a pin. The cooperation between the screw-slider mechanism and the connecting rod 250 can realize the adjustment of the tilt angle of the mounting plate 220. Specifically, the ball screw and slider mechanism can convert the rotational motion of the ball screw 230 into the horizontal sliding of the slider 240 (sliding horizontally in the left and right direction in the figure). The slider 240 moves and drives the connecting rod 250 to move, thereby driving the other end of the mounting plate 220 to rotate relative to the fixed plate 210, and finally realizes the adjustment of the tilt angle of the material separation tank 100.
[0038] The transmission is achieved through a screw-slider mechanism, resulting in a simple structure, smooth transmission, and high precision. Optionally, the ball screw 230 can be driven manually or automatically (e.g., by a motor), and this invention does not impose any limitations on this.
[0039] In this embodiment, the end of the ball screw 230 is provided with a screw handle, which is operated by hand to drive the ball screw 230 to rotate.
[0040] In this embodiment, the fixed plate 210 is provided with a groove along the axial direction parallel to the ball screw 230, and the slider 240 is slidably disposed in the groove. By providing the groove, the transmission accuracy and stability of the entire screw-slider mechanism can be further improved.
[0041] Preferably, the adjustable range of the included angle between the mounting plate 220 and the fixed plate 210 is 0°-60°. The included angle between the mounting plate 220 and the fixed plate 210 can be adjusted by adjusting the rotation direction and amount of the ball screw 230. For example, when the ball screw 230 is driven to rotate clockwise, the other end of the mounting plate 220 rotates upward relative to the fixed plate 210. As the rotation amount of the ball screw 230 increases, the tilt angle of the mounting plate 220 and the material separation tank 100 on it increases; conversely, by driving the ball screw 230 to rotate counterclockwise, the tilt angle of the mounting plate 220 and the material separation tank 100 on it can be decreased.
[0042] In this embodiment, the vibration assembly includes a support frame 310 and a vibration unit 320. The support frame 310 is fixed on the vibration unit 320, and the fixing plate 210 is fixed on the support frame 310. The vibration unit 320 can be a commonly available vibration device according to the vibration frequency requirements; this utility model does not make such a requirement.
[0043] In this embodiment, the material separation tank 100 includes a sliding plate and two baffles, which are respectively disposed on opposite sides of the sliding plate.
[0044] In this embodiment, the discharge port 110 is a long, narrow, obliquely downward-extending opening, and the cross-section of the discharge port 110 along the length direction perpendicular to the material separation tank 100 is a right-angled triangle. This design allows spherical particles to slide smoothly down the slope of the discharge port 110 after sliding from the bottom of the material separation tank 100 to the discharge port 110. At this time, it is only necessary to set a collection container 400 (such as a collection cup) below the discharge port 110 to collect the spherical particles that have been screened.
[0045] It should be noted that this utility model does not impose any restrictions on the size of the material separation tank 100 or the size of the discharge port 110, and can be designed according to actual needs.
[0046] Preferably, the surface roughness Ra of both the material separation tank 100 and the discharge port 110 is less than 0.2 μm. It is understood that the lower the surface roughness of the material separation tank 100 and the discharge port 110, the better, to ensure that the frictional resistance experienced by the sliding particles is minimized. In this embodiment, the material separation tank 100 and the discharge port 110 can be selected from stainless steel plates, glass plates, etc.
[0047] The method of using the device for removing irregular particles from spherical powder provided in this embodiment of the invention is as follows:
[0048] S1. Adjust the tilt angle: Adjust the tilt angle of the material separation tank 100 by rotating the handle of the ball screw 230 to achieve the required tilt angle;
[0049] S2. Adjusting the vibration frequency: By setting the vibration unit 320, the vibration frequency of the material separation tank 100 is adjusted, thereby controlling the discharge speed of the spherical particles.
[0050] S3. Particle spheroidization detection: Spherical powder is placed in the middle of the adjusted material separation tank 100. After high-frequency vibration, spherical particles are separated from irregular particles. The separated spherical particles can fall from the discharge port 110 into the collection container 400 that is placed below the discharge port 110.
[0051] Furthermore, by weighing the spherical powder in advance and the collected spherical particles after sieving, the proportion of spherical particles and irregular particles in the spherical powder can be calculated separately.
[0052] In specific operation, there is no specific limit to the amount of spherical powder added to the material separation tank 100 each time. However, the amount added to the material separation tank 100 should not be too much each time. It can be added according to the actual situation, and the addition speed can also be adjusted according to the actual operation. The purpose is to prevent the spherical powder from accumulating on the material separation tank 100 and affecting the removal of irregular particles in the spherical powder.
[0053] Optionally, before removing irregular particles, the spherical powder can be dehydrated, for example, by heat treatment or vacuum heat treatment, to improve the flowability of the spherical powder to be treated.
[0054] Preferably, the material separation tank 100 and the discharge port 110 need to be cleaned before adding the spherical powder. This invention does not specifically limit this process; commonly used techniques in the field can be employed for cleaning, such as solvent wiping, brushing, or wiping with anhydrous ethanol.
[0055] Combination Figures 2-4 The following is an illustration using a specific example.
[0056] 1) Using silica powder as raw material (particle size range of 15-40μm), from... Figure 2 As can be seen, the raw material contains irregular particles and spherical particles;
[0057] 2) Adopting such Figure 1 The device shown has a material separation tank 100 with a length of 400mm, an inclination angle of α = 23°, and a discharge port 110 with a width of 30mm.
[0058] 3) Weigh 4g of spherical silica powder particles and 1g of irregular powder particles using an electronic balance, mix them thoroughly, and place the mixed powder particles on the material separation tank 100. When vibration starts, the powder particles fall from the middle of the material separation tank 100 to the discharge port 110 below, and then fall from the discharge port 110 to the collection container 400. A small amount of powder particles will remain on the material separation tank 100.
[0059] 4) Replace with another collection container 400 and use a brush to collect the irregular particles remaining on the material separation tank 100;
[0060] 5) Repeat the above steps 3-5 times for 400 particles in two collection containers;
[0061] 6) After repeating the operation 3-5 times, weigh the powder particles in one of the collection containers 400 to find that they are 3.5g and the powder particles in the other collection container 400 are 0.8g.
[0062] 7) Optical microscope images were used to photograph the silica powder before treatment, the silica powder after removal of irregular particles, and the removed irregular particles, as shown below. Figure 2 , Figure 3 and Figure 4 As shown.
[0063] In summary, this utility model provides a device for removing irregular particles from spherical powder. The spherical powder on the material separation tank 100 is spread out by the high-frequency vibration of the vibration component, and different kinetic energy is imparted to particles of different shapes by vibration, so as to efficiently remove some irregular particles that have not been spherized or have poor spherization effect from the spherical particles, thereby improving the sphericity of the spherical powder, and thus improving the flowability and bulk density of the powder.
[0064] Furthermore, it should be understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention's technical solutions using the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention's technical solutions. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention's technical solutions, shall still fall within the protection scope of the present invention's technical solutions.
Claims
1. An apparatus for removing irregular particles from spherical powder, characterized in that, The device includes a material separation tank, an angle adjustment component, and a vibration component. The material separation tank is mounted on the angle adjustment component, which is used to adjust the tilt angle of the material separation tank. The angle adjustment component is mounted on the vibration component, which is used to drive the angle adjustment component and the material separation tank to vibrate. The end of the material separation tank is provided with a discharge port.
2. The apparatus for removing irregular particles from spherical powder according to claim 1, characterized in that, The angle adjustment assembly includes a fixed plate and a mounting plate. The fixed plate is horizontally disposed on the vibration assembly, and the mounting plate is rotatably disposed on the fixed plate. The included angle between the mounting plate and the fixed plate is adjustable, and the material separation tank is fixed on the mounting plate.
3. The apparatus for removing irregular particles from spherical powder according to claim 2, characterized in that, One end of the mounting plate is rotatably connected to one end of the fixed plate. The angle adjustment assembly also includes a screw-slider mechanism and a connecting rod. The screw-slider mechanism includes a ball screw and a slider. The ball screw is rotatably mounted on the fixed plate. The slider is slidably connected to the fixed plate. The two ends of the connecting rod are rotatably connected to the slider and the mounting plate, respectively. By rotating the ball screw, the slider can be driven to slide horizontally, and then the connecting rod drives the other end of the mounting plate to rotate relative to the fixed plate.
4. The apparatus for removing irregular particles from spherical powder according to claim 3, characterized in that, The end of the ball screw is provided with a screw-tightening handle.
5. The apparatus for removing irregular particles from spherical powder according to claim 3, characterized in that, The fixed plate is provided with a groove along the axial direction parallel to the ball screw, and the slider is slidably disposed in the groove.
6. The apparatus for removing irregular particles from spherical powder according to claim 2, characterized in that, The adjustable range of the angle between the mounting plate and the fixing plate is 0°-60°.
7. The apparatus for removing irregular particles from spherical powder according to claim 2, characterized in that, The vibration assembly includes a support frame and a vibration unit. The support frame is fixed on the vibration unit, and the fixing plate is fixed on the support frame.
8. The apparatus for removing irregular particles from spherical powder according to claim 1, characterized in that, The material separation tank includes a sliding plate and two baffles, which are respectively disposed on opposite sides of the sliding plate.
9. The apparatus for removing irregular particles from spherical powder according to claim 1, characterized in that, The discharge port is a long, narrow, obliquely extending downwards, and the cross-section of the discharge port along the length direction perpendicular to the material separation tank is a right-angled triangle.
10. The apparatus for removing irregular particles from spherical powder according to claim 1, characterized in that, The surface roughness of both the material separation tank and the discharge port is less than 0.2 μm.