Roller and roller device

Abstract

The utility model relates to a roller and a roller device. The roller comprises a body part; the first conical part is arranged at one end of the body part; the second conical part is arranged at the other end of the body part; the end plate is arranged at the end part of the second conical part; the rotating shaft is arranged on the end plate; wherein the body part, the first conical part, the second conical part and the end plate form a cavity with an opening in one end, and the body part and the second conical part are each provided with a liquid outlet hole. The liquid outlet holes are formed in the side wall of the roller, reflection of the inner wall of the roller to jet flow is reduced, and the film thickness uniformity after film forming is improved.

Description

Technical Field

[0001] This application relates to the field of magnet preparation, and particularly to a roller and a roller device. Background Art

[0002] Sintered neodymium iron boron magnets are widely used in technical fields such as electronics, electric motors, and communications due to their excellent comprehensive magnetic properties. To improve the corrosion resistance function of neodymium iron boron magnets, a protective layer needs to be formed on the surface of the neodymium iron boron magnets. Existing methods for forming a protective layer on the surface of neodymium iron boron magnets all require soaking the neodymium iron boron magnets in a treatment liquid and then curing to form a film, and the treatment liquid needs to be replaced regularly, increasing production costs.

[0003] A solution to reduce production costs is to use a rolling spraying process to spray the neodymium iron boron magnets in a roller. However, the rolling spraying process is prone to uneven spraying on the surface of the neodymium iron boron magnets, resulting in uneven film thickness after film formation. Summary of the Utility Model

[0004] To at least partially solve the above problems, this application provides a roller and a roller device to improve the uniformity of film formation by spraying.

[0005] An embodiment of this application provides a roller, including:

[0006] A body part;

[0007] A first conical part, arranged at one end of the body part;

[0008] A second conical part, arranged at the other end of the body part;

[0009] An end plate, arranged at the end of the second conical part;

[0010] A rotating shaft, arranged on the end plate;

[0011] Wherein, the body part, the first conical part, the second conical part, and the end plate form a cavity with one end open, and the body part and the second conical part are both provided with liquid outlet holes.

[0012] According to some embodiments of this application, the roller further includes a baffle, and the baffle is arranged on the inner wall of the body part.

[0013] According to some embodiments of this application, a plurality of the baffles are circumferentially and evenly distributed around the axis of the roller.

[0014] According to some embodiments of this application, the shape of the baffle is S-shaped or straight-shaped or Z-shaped, and the baffle is inclined 10 - 45° relative to the inner wall of the body part.

[0015] According to some embodiments of the present application, a discharge port is provided on the body portion, and the drum further includes a discharge plate which is slidably disposed on the body portion and can close the discharge port.

[0016] According to some embodiments of the present application, the discharge plate is provided with a limit block which is used to limit the excessive sliding of the discharge plate in the direction close to the second conical portion.

[0017] According to some embodiments of the present application, a plurality of protrusions are provided on the inner wall of the cavity, the height of the protrusions is 0.5 - 5 mm, and the density of the protrusions is 2 - 6 pieces / cm 2 。

[0018] According to some embodiments of the present application, the aperture of the liquid outlet hole is 1 - 5 mm.

[0019] According to some embodiments of the present application, the shape of the body portion is polygonal, and the shapes of the first conical portion and the second conical portion are both multi - pyramidal shapes corresponding to the body portion.

[0020] An embodiment of the present application provides a drum device, including:

[0021] The drum as described above;

[0022] A bracket, the drum is rotatably disposed on the bracket;

[0023] A driver, connected to the rotating shaft of the drum to drive the drum to rotate.

[0024] The drum of the present application is provided with liquid outlet holes on the side wall, reducing the reflection of the spray flow by the inner wall of the drum, improving the uniformity of the spraying on the surface of the magnet blank, and thus improving the uniformity of the film thickness after film formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exceeding the scope claimed by the present application.

[0026] Figure 1 is a schematic diagram of the drum in the embodiment of the present application Figure One ;

[0027] Figure 2 is a schematic diagram of the drum in the embodiment of the present application Figure Two ;

[0028] Figure 3 is a schematic diagram showing the axis of the drum in the embodiment of the present application being inclined;

[0029] Figure 4 is a schematic diagram of the baffle plate in the embodiment of the present application;

[0030] Figure 5 is a schematic diagram of the inclined setting of the baffle plate in the embodiment of the present application;

[0031] Figure 6 is a schematic diagram of the discharge opening in the embodiment of the present application;

[0032] Figure 7 is a schematic diagram of the connection between the discharge plate and the main body part in the embodiment of the present application;

[0033] Figure 8 is a schematic diagram of the discharge plate in the embodiment of the present application;

[0034] Figure 9 is a schematic diagram of the protrusion in the embodiment of the present application;

[0035] Figure 10 is a schematic diagram of the roller device in the embodiment of the present application. Specific Embodiments

[0036] Next, in conjunction with the accompanying drawings in the embodiments of the present application, the technical solutions of the present application will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0037] As Figure 1 shown, an embodiment of the present application provides a roller 100, which includes a main body part 1, a first conical part 2, a second conical part 3, an end plate 4 and a rotating shaft 5. The roller 100 has a cavity 101 for carrying magnet blanks, and the roller 100 can improve the spraying uniformity of film formation in the rolling spraying process.

[0038] Both the first conical part 2 and the second conical part 3 are conical. The first conical part 2 is arranged at one end of the main body part 1, and the larger-sized end of the first conical part 2 is connected to the main body part 1. The second conical part 3 is arranged at the other end of the main body part 1, and the larger-sized end of the second conical part 3 is connected to the main body part 1.

[0039] The end plate 4 is arranged at the smaller-sized end of the second conical part 3 to close the end opening of the second conical part 3. The main body part 1, the first conical part 2, the second conical part 3 and the end plate 4 together form a cavity 101 with one end open, and the shape of the cavity 101 is substantially the same as the outer wall shape of the roller 100. The magnet blank can enter the cavity 101 through the top opening of the cavity 101.

[0040] The rotating shaft 5 is arranged on the end plate 4, and the axes of the body part 1, the first conical part 2, the second conical part 3, the end plate 4 and the rotating shaft 5 are collinear. The roller 100 can be driven to rotate through the rotating shaft 5.

[0041] As Figure 2 and Figure 3 shown, liquid outlet holes 102 are provided on both the body part 1 and the second conical part 3. When the roller 100 is in use, the axis L of the roller 100 is inclined relative to the horizontal plane so as to carry more magnet blanks in the roller 100. The magnet blanks in the roller 100 are roughly concentrated in the body part 1 and the second conical part 3. A plurality of liquid outlet holes 102 communicating with the cavity 101 are provided on the body part 1 and the second conical part 3. When the spray gun sprays, a mixture of gas and liquid is ejected, and the ejected gas can be discharged from the roller 100 through the liquid outlet holes 102, avoiding the formation of gas turbulence in the cavity 101, which will affect the spraying uniformity of the treatment liquid. At the same time, the dry atomized powder formed during the spraying process can be discharged from the roller 100 through the liquid outlet holes 102, avoiding the accumulation of powder in the roller 100 and affecting the uniformity of film formation on the surface of the blank. At the same time, the liquid outlet holes 102 reduce the inner wall area of the body part 1 and the second conical part 3, thereby reducing the reflection of the spraying liquid by the inner wall of the roller 100 and improving the spraying uniformity on the surface of the magnet blank. The excess liquid ejected can flow out of the cavity 101 through the liquid outlet holes 102.

[0042] Optionally, a reinforcing member 6 is provided at the opening of the cavity 101, and the reinforcing member 6 is annular to improve the bearing capacity of the roller 100.

[0043] As Figure 4 shown, in some embodiments, the roller 100 further includes a baffle 7, and the baffle 7 is arranged on the inner wall of the body part 1. When the roller 100 rotates, the magnet blanks in the cavity 101 tend to concentrate at the bottom. By providing the baffle 7 on the body part 1, the baffle 7 can drive some of the magnet blanks to move up and then fall, reducing the concentration of the magnet blanks at the bottom of the roller 100. The baffle 7 causes the magnet blanks to flip in the cavity 101 of the roller, avoiding the magnet blanks from only sliding along the inner wall of the roller 100, so as to uniformly spray the treatment liquid on the surface of the magnet blanks.

[0044] In some embodiments, the number of the baffles 7 is multiple, and the multiple baffles 7 are circumferentially distributed around the axis L of the roller, which is beneficial to improving the spraying uniformity.

[0045] In some embodiments, the shapes of the multiple baffles 7 are all S-shaped or linear or Z-shaped. For example, during the rotation of the roller 100, the S-shaped baffle 7 can drive more magnet blanks to move up. The length of the baffle 7 is substantially the same as the length of the body part 1 in the direction of the axis L.

[0046] As Figure 5As shown, the baffle 7 is radially inclined 10 - 45° relative to the inner wall of the main body part 1 where the baffle 7 is located. For example, the radial cross-section of the main body part 1 is polygonal. When the inner wall of the main body part 1 where the baffle 7 is located is in a vertical position, the radial direction of the inner wall of the main body part 1 where the baffle 7 is located is the horizontal direction, and the baffle 7 is inclined 10 - 45° upward relative to the horizontal direction. For example, it is inclined 25°.

[0047] The inclined baffle 7 makes the magnet blank more gentle during the flipping process, avoiding excessive impact with the inner wall of the drum 100, causing excessive bumping of the magnet blanks, and improving the qualified rate of the magnets.

[0048] Such as Figure 6 and Figure 7 As shown, in some embodiments, the main body part 1 is provided with a discharge port 11, and a sliding hole 12 is provided at the connection between the main body part 1 and the first conical part 2. The drum 100 further includes a discharge plate 8, and the discharge plate 8 is disposed in the main body part 1 through the sliding hole 12. The width of the discharge port 11 is smaller than the width of the discharge plate 8 to prevent the discharge plate 8 from falling. The discharge plate 8 can close the discharge port 11. The discharge plate 8 moves downward to close the discharge port 11, and the magnet blank is fed into the drum 100 from the top opening of the cavity 101, and the magnet blank is subjected to rolling spraying. After the rolling spraying is completed, the discharge plate 8 moves upward to open the discharge port 11, and the magnet blank falls from the discharge port 11 to complete the discharging of the drum 100.

[0049] Optionally, the discharge plate 8 is provided with a plurality of liquid outlet holes 102.

[0050] Such as Figure 8 As shown, a limiting block 81 is provided at the top of the discharge plate 8, and the limiting block 81 is used to limit the excessive sliding of the discharge plate 8 in the direction close to the second conical part 3, improving the safety of the drum 100.

[0051] Such as Figure 9 As shown, in some embodiments, a plurality of protrusions 9 are provided on the inner wall of the cavity 101. For example, a plurality of protrusions 9 are evenly distributed on the inner walls of the first conical part 2 and the end plate 4 to reduce the adhesion of the magnet blank to the inner wall of the cavity, and at the same time, the magnet blank can be dispersed to avoid the magnet blanks from adhering to each other. The plurality of protrusions 9 form a structure similar to fish scale patterns. Optionally, a plurality of protrusions 9 are also provided on the inner walls of the main body part 1 and the second conical part 3.

[0052] Optionally, the height of the protrusion 9 is 0.5 - 5 mm, and the density of the protrusion 9 is 2 - 6 pieces / cm 2。If the height of the protrusion 9 is too small, the ability to reduce the adhesion between the magnet blank and the inner wall of the cavity is limited. If the height of the protrusion 9 is too large, the magnet blank may be stuck between adjacent protrusions 9. The density of the protrusion 9 is inversely proportional to the height of the protrusion 9. The greater the height of the protrusion 9, the smaller the density of the protrusion 9, so as to reduce the probability of the magnet blank being stuck between adjacent protrusions 9. The smaller the height of the protrusion 9, the greater the density of the protrusion 9, and the protrusion 9 plays a role in preventing the magnet blank from contacting the inner wall of the drum.

[0053] In some embodiments, the aperture diameter of the liquid outlet hole 102 is 1-5 mm. For example, the aperture diameter of the liquid outlet hole 102 is 1 mm, 3 mm or 5 mm. If the aperture diameter of the liquid outlet hole 102 is too large, the magnet blank in the drum 100 may fall off. If the aperture diameter of the liquid outlet hole 102 is too small, on the one hand, it is not conducive to gas discharge, resulting in gas turbulence in the cavity 101, which in turn affects the spraying uniformity of the treatment liquid. On the other hand, it is not conducive to liquid discharge, resulting in the liquid that is not sprayed on the surface of the magnet blank solidifying and caking, and being mixed with the magnet blank in the cavity 101, which in turn affects the uniformity of the film layer on the surface of the magnet blank.

[0054] The total area of the liquid outlet holes 102 accounts for 20-30% of the total area of the main body part 1 and the second conical part 3. The total area of the liquid outlet holes 102 is the sum of the opening areas of all the liquid outlet holes 102, and the total area of the main body part 1 and the second conical part 3 is the sum of the inner wall areas of the main body part 1 and the second conical part 3. If the total area of the liquid outlet holes 102 is too large, it will affect the aperture diameter of the liquid outlet holes 102. If the total area of the liquid outlet holes 102 is too small, it is not conducive to gas and liquid discharge, affecting the film forming efficiency of the liquid on the surface of the magnet blank and the uniformity of the film layer surface after film formation.

[0055] In some embodiments, the shape of the main body part 1 is polygonal, and the shapes of the first conical part 2 and the second conical part 3 are both multi-pyramidal corresponding to the main body part 1. For example, the radial cross-section of the main body part 1 is octagonal, and the shapes of the first conical part 2 and the second conical part 3 are both octagonal pyramids, which is conducive to the rotation of the magnet blank with the drum 100.

[0056] As Figure 10 shown, an embodiment of the present application provides a drum device 200, and the drum device 200 includes the drum 100, the bracket 210 and the driver 220 as described above.

[0057] The drum 100 is rotatably arranged on the bracket 210. For example, a bearing 240 is arranged on the bracket 210, and the rotating shaft 5 is connected to the bearing 240 to realize the rotational connection between the drum 100 and the bracket 210. The axis L of the drum 100 is inclined relative to the horizontal plane.

[0058] The driver 220 is connected to the rotating shaft 5 of the drum to drive the drum 100 to rotate. For example, the driver 220 is a motor, and a gear 230 is provided at the end of the rotating shaft 5, and the motor is connected to the gear 230 to drive the drum 100 to rotate.

[0059] The embodiments of the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application. Therefore, any changes or deformations made by those skilled in the art based on the idea of the present application and within the specific implementation manner and application scope of the present application fall within the protection scope of the present application. In summary, the content of this specification should not be construed as a limitation on the present application.

Claims

1. A roller, characterized in that, Comprising: The main body part; The first conical part, arranged at one end of the main body part; The second conical part, arranged at the other end of the main body part; The end plate, arranged at the end of the second conical part; The rotating shaft, arranged on the end plate; Wherein, the main body part, the first conical part, the second conical part and the end plate form a cavity with one end open, and the main body part and the second conical part are both provided with liquid outlet holes.

2. The drum according to claim 1, characterized in that, It further includes a baffle plate, and the baffle plate is arranged on the inner wall of the main body part.

3. The drum according to claim 2, wherein, A plurality of the baffle plates are circumferentially and evenly distributed around the axis of the drum.

4. The drum according to claim 2, characterized in that, The shape of the baffle plate is S-shaped or straight-shaped or Z-shaped, and the baffle plate is inclined 10 - 45° relative to the inner wall of the main body part.

5. The drum according to claim 1, characterized in that, The main body part is provided with a discharge port, and the drum further includes a discharge plate, the discharge plate is slidably arranged on the main body part, and the discharge plate can close the discharge port.

6. The drum according to claim 5, characterized in that, The discharge plate is provided with a limit block, and the limit block is used to limit the discharge plate from sliding excessively in the direction close to the second conical part.

7. The drum according to claim 1, wherein The inner wall of the cavity is provided with a plurality of protrusions, the height of the protrusions is 0.5 - 5 mm, and the density of the protrusions is 2 - 6 pieces / cm 2 .

8. The drum according to claim 1, characterized in that, The aperture of the liquid outlet hole is 1 - 5 mm.

9. The drum according to claim 1, characterized in that, The shape of the main body part is polygonal, and the shapes of the first conical part and the second conical part are both multi-pyramidal shapes corresponding to the main body part.

10. A drum device, characterized in that, Comprising: The drum according to any one of claims 1 - 9; The bracket, the drum is rotatably arranged on the bracket; The driver, connected to the rotating shaft of the drum to drive the drum to rotate.

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