Magnetic core raw material grinding equipment

Abstract

Magnetic core raw material grinding equipment comprises a shell, a fixed grinding disc arranged on the inner wall of the shell and a first rotating grinding disc located above the fixed grinding disc, a gap between the fixed grinding disc and the first rotating grinding disc is sequentially reduced from the outer edge to the center, a feeding port is formed in the top of the shell, and a discharging port is formed in the center of the fixed grinding disc. And a driving mechanism is arranged on the outer wall of the top of the shell and used for driving the first rotating millstone to rotate, a plurality of discharging openings are formed in the first rotating millstone and vertically penetrate through the first rotating millstone, and the calibers of the discharging openings are gradually increased from the center of the first rotating millstone to the outside. According to the magnetic core raw material grinding equipment, small-particle powder can be conveniently discharged into the corresponding grinding gaps to be ground, the unnecessary grinding time of the small-particle powder is shortened, meanwhile, raw material powder with different particle sizes can be discharged into the corresponding grinding gaps, and the grinding efficiency is improved. And large particles and small particles are prevented from being mixed to influence the grinding effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic core grinding equipment, especially relates to a magnetic core raw material grinding equipment. BACKGROUND

[0002] The magnetic core is a part widely used in various electronic components and devices, which is formed by molding and sintering of metal powder with magnetism. The quality of the metal powder determines the quality of the magnetic core. The metal powder needs to be ground before use. The metal powder with large particles is ground into small particle powder meeting the production requirements. In the prior art, the grinding is generally carried out by fixed grinding and rotating grinding. For example, a kind of magnetic core raw material grinding device is disclosed in Chinese authorized publication No. CN216879601U. The device first crushes the raw material in staggered manner, and then grinds the raw material by fixed grinding and rotating grinding, which greatly improves the grinding efficiency of the grinding unit and the overall working efficiency. The damage of metal particles to the grinding unit is reduced, and the service life is prolonged. However, there are still the following defects. During the grinding process of the crushed raw material by the fixed grinding and rotating grinding, the large particles and small particles are mixed together. For the small particle powder meeting the requirements, the existence of small particles not only directly affects the grinding of large particle powder, but also prolongs the unnecessary grinding time of small particle powder. SUMMARY

[0003] The purpose of the utility model is to provide a magnetic core raw material grinding equipment to solve the problems in the background art, facilitate the discharge of small particle powder into the corresponding grinding gap for grinding, reduce the unnecessary grinding time of small particle powder, and avoid the mixing of large particles and small particles affecting the grinding of large particle powder.

[0004] To achieve the above purpose, the following technical scheme is adopted: a magnetic core raw material grinding equipment, comprising a shell, a fixed grinding disc arranged on the inner wall of the shell, and a first rotating grinding disc located above the fixed grinding disc, the gap between the fixed grinding disc and the first rotating grinding disc gradually decreases from the outer edge to the center, the top of the shell is provided with a feeding port, the center of the fixed grinding disc is provided with a discharge port, the outer wall of the top of the shell is provided with a driving mechanism for driving the first rotating grinding disc to rotate, a plurality of discharge ports are arranged on the first rotating grinding disc, the discharge ports penetrate the first rotating grinding disc from top to bottom, and the diameter of the discharge ports gradually increases from the center of the first rotating grinding disc to the outside.

[0005] Preferably, a second rotating grinding disc is arranged below the fixed grinding disc, the first rotating grinding disc is connected with the second rotating grinding disc through a driving shaft, the gap between the fixed grinding disc and the second rotating grinding disc gradually decreases towards the inner wall of the shell, and a plurality of uniformly distributed holes are arranged on the second rotating grinding disc, the size of the uniformly distributed holes is smaller than the smallest gap between the fixed grinding disc and the second rotating grinding disc.

[0006] Preferably, the first rotating mill disc lower surface and the fixed mill disc upper surface are provided with a plurality of protruding coarse grinding parts, which are semispherical or tooth-shaped, and the size of the coarse grinding parts gradually decreases according to the gap between the first rotating mill disc and the fixed mill disc.

[0007] Preferably, the fixed mill disc lower surface and the second rotating mill disc upper surface are provided with a plurality of protruding fine grinding parts, which are semispherical or tooth-shaped, and the plurality of fine grinding parts gradually decrease according to the gap between the second rotating mill disc and the fixed mill disc.

[0008] Preferably, the inner bottom of the shell is provided with a receiving disc.

[0009] Preferably, the first rotating mill disc peripheral wall and the shell inner wall have a predetermined gap.

[0010] Preferably, the fixed mill disc upper surface has a first flow guide surface inclined downwardly toward the discharge port, and the fixed mill disc lower surface has a third flow guide surface inclined upwardly toward the discharge port.

[0011] Preferably, the first rotating mill disc upper surface has a second flow guide surface inclined downwardly toward the shell inner wall.

[0012] The present application has the following beneficial effects:

[0013] Compared with the prior art, the magnetic core raw material grinding device has the following advantages: the smaller particle powder can be discharged into the corresponding grinding gap for grinding, the unnecessary grinding time of the small particle powder is reduced, the raw material powder of different particle sizes can be discharged into the corresponding grinding gap, the mixing of large particles and small particles is avoided or reduced to affect the grinding effect, the uniform distribution holes are arranged to allow the powder meeting the requirements to be discharged through the uniform distribution holes, the mixing of the powder affects the grinding effect of the fine grinding process, the passing property of the raw material in the grinding process is improved, and the clogging is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 The figure is a structural schematic view of the present application.

[0015] Fig. 2 The figure is a structural schematic view of the first rotating mill disc.

[0016] In the figure, 1 is a shell, 2 is a fixed mill disc, 3 is a first rotating mill disc, 31 is a discharge port, 4 is an inlet, 5 is a discharge port, 6 is a driving mechanism, 7 is a second rotating mill disc, 71 is a uniform distribution hole, 8 is a driving shaft, and 9 is a receiving disc. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0018] In the description of the utility model, it needs to understand that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0019] Referring to the drawings Figs. 1-2 A kind of magnetic core raw material grinding equipment, including shell 1, base 11 being arranged at the bottom of shell 1, fixed mill 2 being arranged on the inner wall of shell 1 and first rotating mill 3 being located above fixed mill 2, the gap between fixed mill 2 and first rotating mill 3 gradually decreases from outer edge to center, the top of shell 1 is provided with feed inlet 4, feed inlet 4 is connected with feed pipe and extends to the center above first rotating mill 3, the center of fixed mill 2 is provided with discharge port 5, the outer wall of the top of shell 1 is provided with driving mechanism 6 for driving first rotating mill 3 to rotate, driving mechanism 6 is servo motor, its output end is connected with driving shaft 8, first rotating mill 3 is fixed on driving shaft 8, a plurality of discharge ports 31 are provided on first rotating mill 3, discharge port 31 penetrates first rotating mill 3 from top to bottom, and the diameter of discharge port 31 gradually increases from the center of first rotating mill 3 to the outside.When using, the mixed powder of raw material of large particle and small particle is entered to the center of the upper surface of first rotating mill 3 through feed inlet 4, first rotating mill 3 is rotated under the action of driving mechanism 6, centrifugal force is generated when first rotating mill 3 rotates, smaller particles in mixed powder first pass through discharge port 31 close to the center of first rotating mill 3 and are discharged to the smaller gap between first rotating mill 3 and fixed mill 2, so that smaller particles no longer pass through the larger gap between first rotating mill 3 and fixed mill 2, thereby reducing unnecessary grinding time of small particle powder;And the raw material powder of larger particle moves to the discharge port 31 far from the center of first rotating mill 3, since discharge port 31 gradually increases to the direction of shell inner wall, so that larger particles are discharged to the larger gap between first rotating mill 3 and fixed mill 2 through the discharge port 31. In this way, it is convenient to discharge the powder of smaller particles to the corresponding grinding gap for grinding, reduce unnecessary grinding time of small particle powder, and at the same time, raw material powder of different particle sizes can be discharged to the corresponding grinding gap, to avoid or reduce the influence of the mixing of large particles and small particles on grinding effect.

[0020] In the embodiment, in order to further grind the raw material powder, the second rotating mill plate 7 is arranged below the fixed mill plate 2, the first rotating mill plate 3 is connected with the second rotating mill plate 7 through the driving shaft 8, the gap between the fixed mill plate 2 and the second rotating mill plate 7 gradually decreases towards the inner wall of the shell 1, and the second rotating mill plate 7 is provided with a plurality of uniformly distributed holes 71, the size of the uniformly distributed holes 71 is smaller than the minimum gap between the fixed mill plate 2 and the second rotating mill plate 7, by arranging the uniformly distributed holes 71, the required powder can be discharged through the uniformly distributed holes 71, the mixing is avoided to affect the grinding effect of the raw material in the fine grinding process, the passing property of the raw material in the grinding process is improved, and the blockage is avoided.

[0021] Specifically, the lower surface of the first rotating mill plate 3 and the upper surface of the fixed mill plate 2 are provided with a plurality of protruding coarse grinding parts (not shown in the figure), the coarse grinding parts are hemispherical or tooth-shaped, and the size of the coarse grinding parts gradually decreases in sequence according to the gap between the first rotating mill plate 3 and the fixed mill plate 2, that is, gradually decreases in sequence towards the discharge port 5.

[0022] Specifically, the lower surface of the fixed mill plate 2 and the upper surface of the second rotating mill plate 7 are provided with a plurality of protruding fine grinding parts (not shown in the figure), the fine grinding parts are hemispherical or tooth-shaped, and the plurality of fine grinding parts gradually decrease in sequence according to the gap between the second rotating mill plate 7 and the fixed mill plate 2, that is, gradually decrease in sequence towards the inner wall of the shell 1.

[0023] In order to facilitate the collection of the powder, the inner bottom of the shell 1 is provided with a receiving disc 9.

[0024] The first rotating mill plate 3 is provided with a plurality of protruding coarse grinding parts (not shown in the figure) on the lower surface, the coarse grinding parts are hemispherical or tooth-shaped, and the size of the coarse grinding parts gradually decreases in sequence according to the gap between the first rotating mill plate 3 and the fixed mill plate 2, that is, gradually decreases in sequence towards the discharge port 5.

[0025] In the embodiment, the upper surface of the fixed mill plate 2 has a first flow guide surface inclined downwardly towards the discharge port 5, the lower surface of the fixed mill plate 2 has a third flow guide surface inclined upwardly towards the discharge port 5, and the upper surface of the first rotating mill plate 3 has a second flow guide surface inclined downwardly towards the inner wall of the shell 1, so as to facilitate the natural flow of the raw material powder.

[0026] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A magnetic core raw material grinding device, comprising a shell (1), a fixed grinding disc (2) arranged on the inner wall of the shell (1), and a first rotating grinding disc (3) located above the fixed grinding disc (2), the gap between the fixed grinding disc (2) and the first rotating grinding disc (3) decreases from the outer edge to the center, the top of the shell (1) is provided with a feeding port (4), the center of the fixed grinding disc (2) is provided with a discharging port (5), and the outer wall of the top of the shell (1) is provided with a driving mechanism (6) for driving the first rotating grinding disc (3) to rotate, characterized in that, The first rotating mill disc (3) is provided with a plurality of discharge ports (31) which penetrate the first rotating mill disc (3) from top to bottom, and the diameter of the discharge ports (31) gradually increases from the center of the first rotating mill disc (3) to the outside.

2. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The second rotating mill disc (7) is arranged below the fixed mill disc (2), the first rotating mill disc (3) is connected with the second rotating mill disc (7) through a driving shaft (8), the gap between the fixed mill disc (2) and the second rotating mill disc (7) gradually decreases towards the inner wall of the shell (1), and the second rotating mill disc (7) is provided with a plurality of uniformly distributed holes (71), the size of the holes (71) is smaller than the minimum gap between the fixed mill disc (2) and the second rotating mill disc (7).

3. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The lower surface of the first rotating mill disc (3) and the upper surface of the fixed mill disc (2) are provided with a plurality of protruding coarse grinding parts, and the size of the coarse grinding parts gradually decreases according to the gap between the first rotating mill disc (3) and the fixed mill disc (2).

4. The magnetic core raw material grinding apparatus according to claim 2, characterized by: The lower surface of the fixed mill disc (2) and the upper surface of the second rotating mill disc (7) are provided with a plurality of protruding fine grinding parts, and the size of the fine grinding parts gradually decreases according to the gap between the second rotating mill disc (7) and the fixed mill disc (2).

5. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The inner bottom of the shell (1) is provided with a receiving disc (9).

6. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The peripheral wall of the first rotating mill disc (3) has a predetermined gap with the inner wall of the shell (1).

7. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The upper surface of the fixed mill disc (2) has a first flow guide surface which is inclined downward to the discharge port (5), and the lower surface of the fixed mill disc (2) has a third flow guide surface which is inclined upward to the discharge port (5).

8. The magnetic core raw material grinding apparatus according to claim 1, characterized by: The upper surface of the first rotating mill disc (3) has a second flow guide surface which is inclined downward to the inner wall of the shell (1).

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