A combing and mixing device for breaking up agglomerated fines

Abstract

The application provides a comb cutter stirring device for crushing agglomerated fine powder, comprising a base, a motor fixing seat, a vibrating motor, a tray, a stirring motor and a stirring comb cutter, the motor fixing seat is arranged on the base through a plurality of supporting springs, the tray is fixed on the motor fixing seat, the body of the vibrating motor is fixed on the motor fixing seat, the vibrating motor is a double-shaft vibrating motor, the vibrating motor is provided with an upper eccentric block and a lower eccentric block, the upper eccentric block and the lower eccentric block have an included angle in the top view; the stirring motor is connected with the stirring comb cutter and located above the tray, the stirring comb cutter extends into the tray; the device can effectively crush the powder agglomeration while ensuring uniform coating.

Description

Technical Field

[0001] This application belongs to the field of materials modification technology, and more specifically, relates to a comb-shaped stirring device for breaking up agglomerated micro powders. Background Technology

[0002] In PVD powder coating, powder fluidization is a key technology for achieving uniform coating. During the fluidization process within the vacuum coating chamber, fine powders, due to their large specific surface area and high surface energy, often exhibit agglomeration, which is more pronounced with finer particles. Therefore, it is necessary to introduce repulsive forces to counteract the attractive forces between particles (such as van der Waals forces and liquid bridging forces). Typically, this can be achieved by chemically coating the particle surface with inorganic materials such as SiO2 or Al2O3 to form an inert physical barrier, preventing direct particle contact; or by coating with surfactants (such as stearic acid), coupling agents, or polymers, utilizing steric hindrance (physical obstruction) or electrostatic repulsion (charge repulsion) to prevent particles from approaching each other. However, these methods introduce new chemical components, altering the material's properties.

[0003] Existing methods also include stirring, turning, or swaying to break up powder agglomerates, but relying solely on this method can lead to poor uniformity of coating during powder deposition. Summary of the Invention

[0004] To address the shortcomings of the prior art, the purpose of this application is to provide a comb-blade stirring device for breaking up agglomerated micro powders. The device uses a comb blade to stir the powder, thereby breaking up the agglomerates, and then uses a vibration motor to provide vibration force, so that the powder is uniformly coated.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a comb-type stirring device for crushing agglomerated micro powder is provided, comprising: a base, a motor mounting base, a vibrating motor, a material tray, a stirring motor, and a stirring comb. The motor mounting base is mounted on the base by a support spring. The material tray is fixed on the motor mounting base. The body of the vibrating motor is fixed on the motor mounting base. The stirring motor is connected to the stirring comb and located above the material tray. The stirring comb extends into the material tray.

[0006] In one embodiment, the vibration motor is a dual-axis vibration motor with rotor shafts at both ends. The dual-axis vibration motor is installed vertically, with an upper eccentric block installed on the upper rotor shaft and a lower eccentric block installed on the lower rotor shaft. The upper eccentric block and the lower eccentric block have an angle in a top view.

[0007] In one embodiment, the stirring motor is connected to the stirring comb via a planetary reducer, a coupling, and a magnetorheological fluid, and a protective sleeve is provided at the connection between the magnetorheological fluid and the stirring comb.

[0008] In one embodiment, two agitator combs are symmetrically arranged.

[0009] In one embodiment, the angle between the upper eccentric block and the lower eccentric block in a top-view projection is 30° to 60°.

[0010] In one embodiment, the angle between the upper eccentric block and the lower eccentric block is 45° in a top-view projection.

[0011] In one embodiment, the support springs are provided in multiple configurations.

[0012] In one embodiment, there are three support springs.

[0013] In one embodiment, the tray has a trapezoidal cross-section and its sidewalls are inclined walls with an inclination angle of 15° to 45°.

[0014] In one embodiment, the sidewall of the tray is an inclined wall with an inclination angle of 25° to 35°.

[0015] In one embodiment, the agitating comb includes an agitating rod and an agitating toothed plate, wherein the agitating toothed plate is a comb plate or a brush plate.

[0016] In one embodiment, the motor mounting base includes a support plate and a hollow frame. The size of the support plate is larger than that of the hollow frame. The material tray is mounted on the upper surface of the support plate, and the lower surface of the support plate, located on the outer periphery of the hollow frame, is connected to the support spring. The hollow frame is fixed to the center of the lower surface of the support plate and the vibration motor is mounted thereon.

[0017] In one embodiment, the base is provided with a clearance hole larger than that of the vibration motor, or the base is a frame base.

[0018] In one embodiment, the distance between the stirring comb and the side wall of the material tray is 3~8mm.

[0019] The beneficial effects of the comb-knife stirring device for crushing agglomerated micro powder provided in this application are as follows: the upper and lower eccentric blocks are driven to rotate by a vibrating motor, causing the material tray connected by a support spring to vibrate. This allows the powder to revolve within the material tray while spreading evenly from the center outwards, forming a "long vortex motion." As the powder climbs up the inclined surface of the material tray and accumulates at the highest point, it tumbles and falls, repeating this cycle to ensure that the powder surface is evenly coated throughout the entire coating process. After a period of circulation, the powder will agglomerate or clump on the surface. Then, the stirring motor is started to drive the stirring comb to rotate, so that the powder is subjected to the crushing force of the stirring comb in both the circumferential and radial directions, thereby achieving the crushing of agglomerates. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the comb-blade stirring device for breaking up agglomerated micro powder provided in the embodiments of this application;

[0022] Figure 2 This is a schematic diagram of the first structure of the stirring comb in the comb-shaped stirring device for crushing and agglomerating micro powder provided in the embodiments of this application;

[0023] Figure 3 This is a schematic diagram of a second structure of the stirring comb in the comb-shaped stirring device for crushing and agglomerating micro powder provided in the embodiments of this application;

[0024] Figure 4 This is a partial structural diagram of the comb-blade stirring device for breaking up agglomerated micro powder provided in an embodiment of this application.

[0025] Figure 5 A schematic diagram of the included angle structure between the upper and lower eccentric blocks in the comb-knife stirring device for crushing and agglomerating micro powder provided in the embodiments of this application;

[0026] Figure 6 A top view schematic diagram of the powder flowing in the feed pan in the comb-knife stirring device for crushing and agglomerating micro powder provided in the embodiments of this application;

[0027] Figure 7 This is a side view schematic diagram of the powder flowing in the feed pan in the comb-type agitator for crushing and agglomerating micro-powder provided in the embodiments of this application.

[0028] The following are the labeling elements in the figure:

[0029] 1. Base; 2. Motor mounting bracket; 21. Support plate; 22. Hollow frame; 3. Vibrating motor; 31. Upper eccentric block; 32. Lower eccentric block; 4. Material tray; 5. Support spring; 6. Agitator motor; 7. Planetary reducer; 8. Coupling; 9. Motor mounting plate; 10. Connecting rod; 11. Magnetofluid; 12. Protective sleeve; 13. Agitator comb. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] 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 this application 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 this application.

[0033] 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 this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] like Figures 1-7 As shown, a comb-blade stirring device for breaking up agglomerated micro-powder provided in this application embodiment will now be described in detail. This comb-blade stirring device is part of a vacuum coating equipment, specifically including: a base 1, a motor mounting base 2, a vibrating motor 3, a material tray 4, a stirring motor 6, and a stirring comb 13. The base 1 is disposed within the vacuum chamber of the vacuum coating equipment. The motor mounting base 2 is mounted on the base 1 by a support spring 5. The material tray 4 is fixed to the motor mounting base 2. The body of the vibrating motor 3 is fixed to the motor mounting base 2, and the vibrating motor 3 is located below the material tray 4.

[0035] In this embodiment, the vibratory motor 3 is a dual-shaft vibratory motor with rotor shafts at both ends. The dual-shaft vibratory motor is vertically mounted, with an upper eccentric block 31 mounted on the upper rotor shaft and a lower eccentric block 32 mounted on the lower rotor shaft. The upper eccentric block 31 and the lower eccentric block 32 have an angle in the top view, meaning they are misaligned. This causes the vibratory motor 3 to generate a special vibration force when it operates, causing the powder in the material tray 4 to rotate and diffuse from the center of the tray 4 outwards. Figure 6As shown, a "long vortex motion" is formed, and as... Figure 7 As shown, the powder climbs up the inclined surface of the material tray 4 and accumulates at the highest point, then tumbles and falls. This tumbling cycle ensures that the powder surface is uniformly coated throughout the entire coating process. In this embodiment, the inclined wall of the material tray 4 corresponds to the coating area.

[0036] The stirring motor 6 is connected to the stirring comb 13 and located above the material tray 4. Specifically, the stirring motor 6 is positioned outside the vacuum chamber, and the stirring comb 13 extends into the material tray 4. The stirring comb 13 is comb-shaped or brush-shaped, effectively stirring the powder and breaking up agglomerates. After the powder undergoes coating cycle for a period of time, the powder will agglomerate or clump on the surface. Then, the stirring motor 6 is started to drive the stirring comb 13 to rotate, so that the powder is subjected to the crushing force of the stirring comb 13 in both the circumferential and radial directions, thereby breaking up the agglomerates and ensuring that the powder is in single-particle form.

[0037] In this embodiment, the stirring motor 6 is connected to the stirring comb 13 via a planetary reducer 7, a coupling 8, and a magnetic fluid 11. A protective sleeve 12 is provided at the connection between the magnetic fluid 11 and the stirring comb 13. Specifically, a support frame is provided on the top of the vacuum coating equipment. The support frame includes two spaced-apart motor mounting plates 9 and multiple connecting rods 10 connecting the two motor mounting plates 9. The body of the magnetic fluid 11 is sealed at the top of the vacuum chamber. The stirring motor 6 and the planetary reducer 7 are connected and mounted on the upper motor mounting plate 9. The lower motor mounting plate 9 can be the top plate of the vacuum coating equipment or can be sealed and welded to the top of the vacuum coating equipment for sealing the magnetic fluid 11. The magnetic fluid 11 is a magnetic fluid seal used to achieve a sealed transmission connection between the coupling 8 and the stirring comb 13, ensuring the airtightness of the vacuum chamber. The output shaft of the planetary reducer 7 is connected to the upper end of the drive shaft of the magnetic fluid 11 via the coupling 8, and the lower end of the drive shaft of the magnetic fluid 11 is then connected to the stirring comb 13.

[0038] The planetary reducer 7 is used to reduce speed and increase torque, and to match the load inertia, thereby improving transmission stability. The magnetohydrodynamic fluid 11 is detachably connected to the stirring comb 13, which makes it convenient to replace different stirring combs 13 according to different stirring requirements.

[0039] In this embodiment, the stirring comb 13 includes a stirring rod and a stirring toothed plate. The stirring toothed plate is a comb plate or a brush plate. The stirring rod is detachably connected to the magnetic fluid, and the stirring rod is fixedly connected to the comb plate. The stirring rod can be configured as follows: Figure 2 The bending type shown or as Figure 3 The linear configuration shown can, of course, be configured in other styles. The stirring rod can be one or two; the shape of the comb plates adapts to the sidewall shape of the feed tray, and the number of comb plates can be arranged in a straight line or a cross shape; for example... Figure 1As shown, the mixing comb 13 is arranged in two rows in a straight line.

[0040] In this embodiment, a protective sleeve 12 is provided on the magnetic fluid 11 and the stirring rod located inside the vacuum coating equipment. The protective sleeve 12 is used to isolate and protect the connection position and part of the structure of the magnetic fluid 11 and the stirring rod, preventing powder from entering the vacuum coating equipment. The protective sleeve 12 is provided with an interface for inserting the stirring rod, which is then connected to the magnetic fluid 11 after being inserted into the interface.

[0041] In this embodiment, the stirring rod is a telescopic rod to accommodate different gap requirements between the comb plate and the side walls of the material tray. Specifically, the stirring rod includes a large tube and a small rod. The large tube is used to connect to the magnetic fluid component 11, and the small rod is used to connect to the comb plate. The small rod is inserted into the large tube, and multiple fastening screws are threaded at intervals on the outer wall of the large tube. The fastening screws press against the outer wall of the small rod and fix its position. By loosening the fastening screws and then adjusting the insertion depth of the small rod into the large tube, the gap between the comb plate and the side walls of the material tray can be adjusted. Tightening the fastening screws then fixes the position of the small rod. Of course, the position adjustment of the large tube and the small rod can also be achieved in other ways, such as by providing a tapered locking head on the large tube, which is threaded into the large tube and locks the end of the large tube to clamp the small rod.

[0042] In this embodiment, the distance between the comb plate and the side wall of the material tray is 3~8mm, and the spacing is achieved by adjusting the extension and retraction of the stirring rod. The spacing between the comb teeth of the comb plate is 2~5mm, which is selected according to the size of the powder particles.

[0043] Specifically, such as Figure 2 As shown, in a top-view projection, the included angle between the upper eccentric block 31 and the lower eccentric block 32 is 30°~60°; preferably 45°.

[0044] In this embodiment, multiple support springs 5 ​​are provided, preferably three. Of course, the number of support springs 5 ​​can be appropriately increased according to the weight of the material tray 4 and the powder inside. Under normal circumstances, there are four or six support springs 5.

[0045] In this embodiment, the cross-section of the tray 4 is trapezoidal, and its sidewalls are inclined walls with an inclination angle of 15° to 45°. Preferably, the inclination angle is 25° to 35°.

[0046] In this embodiment, in order to make the upper eccentric block 31 and the lower eccentric block 32 suspended, the motor mounting base 2 includes a support plate 21 and a hollow frame 22. The size of the support plate 21 is larger than the size of the hollow frame 22. The material tray 4 is installed on the upper surface of the support plate 21, and the lower surface of the support plate 21, located on the outer periphery of the hollow frame 22, is connected to the support spring 5. The hollow frame 22 is fixed to the center of the lower surface of the support plate 21 and a dual-axis vibration motor 3 is installed thereon. The base 1 is provided with a clearance hole larger than that of the dual-axis vibration motor 3, or the base 1 is a frame base.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A comb-blade stirring device for breaking up agglomerated micro-powders, characterized in that, include: The base (1), motor mounting base (2), vibration motor (3), material tray (4), stirring motor (6) and stirring comb (13) are provided. The motor mounting base (2) is mounted on the base (1) by a support spring (5). The material tray (4) is fixed on the motor mounting base (2). The body of the vibration motor (3) is fixed on the motor mounting base (2). The stirring motor (6) is connected to the stirring comb (13) and is located above the material tray (4). The stirring comb (13) extends into the material tray (4).

2. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: The vibration motor (3) is a dual-axis vibration motor with rotor shafts at both ends. The dual-axis vibration motor is installed vertically. The upper rotor shaft is equipped with an upper eccentric block (31), and the lower rotor shaft is equipped with a lower eccentric block (32). The upper eccentric block (31) and the lower eccentric block (32) have an angle in the top view projection.

3. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 2, characterized in that: The stirring motor (6) is connected to the stirring comb (13) via a planetary reducer (7), a coupling (8) and a magnetic fluid (11), and a protective sleeve (12) is provided at the connection between the magnetic fluid (11) and the stirring comb (13).

4. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: Two agitator combs (13) are symmetrically arranged.

5. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 2, characterized in that: In a top-view projection, the included angle between the upper eccentric block (31) and the lower eccentric block (32) is 30°~60°.

6. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: The support spring (5) is configured as a plurality of springs.

7. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: The cross-section of the tray (4) is trapezoidal, and its sidewalls are inclined walls with an inclination angle of 15°~45°.

8. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: The stirring comb includes a stirring rod and a stirring toothed plate, wherein the stirring toothed plate is a comb toothed plate or a brush plate.

9. The comb-blade stirring device for breaking up agglomerated micro-powder as described in any one of claims 1-8, characterized in that: The motor mounting base (2) includes a support plate (21) and a hollow frame (22). The size of the support plate (21) is larger than that of the hollow frame (22). The material tray (4) is mounted on the upper surface of the support plate (21). The lower surface of the support plate (21) and located on the outer periphery of the hollow frame (22) are connected to the support spring (5). The hollow frame (22) is fixed to the center of the lower surface of the support plate (21) and the vibration motor (3) is mounted thereon.

10. The comb-blade stirring device for breaking up agglomerated micro-powder as described in claim 1, characterized in that: The distance between the stirring comb (13) and the side wall of the material tray 4 is 3~8mm.

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