Water absorption plate for upper die of permanent magnetic ferrite magnetic shoe

Abstract

The utility model discloses a permanent magnetic ferrite magnetic shoe upper die water absorption plate which comprises an upper end face, a bottom face and a water outlet, the bottom face is an arc face, the upper end face is provided with a slope face with the two sides facing inwards, a U-shaped water groove is formed in the lowest point of the slope face and communicated with the water outlet, and vertical water absorption holes are evenly formed between the upper end face and the bottom face. A water return cavity is formed in the lower end of the vertical water suction hole, the vertical water suction hole is communicated with a water suction hole, the communication position of the water suction hole is higher than the bottom of the water return cavity, horizontal water grooves are formed in the two sides of the upper end face, and the horizontal water grooves are communicated with the vertical water suction hole close to the chamfer of the magnetic shoe. When a part of water still existing in the horizontal drainage cavity or the vertical drainage hole flows back, the water flows into the water return cavity and does not flow out of the water absorption plate, so that the water return phenomenon is avoided, and the phenomenon that the water drops on a green body to cause invisible cracks during product sintering is prevented.

Description

Technical Field

[0001] This utility model relates to the field of magnetic tile mold technology, and in particular to a water-absorbing plate for the upper mold of a permanent magnet ferrite magnetic tile. Background Technology

[0002] With the development of energy conservation and green practices in society, the application of permanent magnet DC motors is becoming increasingly widespread, especially in the home appliance, automotive, and power tool industries where demand for permanent magnet DC motors is growing rapidly. Unlike AC motors, which generate a magnetomotive force source through excitation coils, permanent magnet DC motors generate a constant magnetomotive force source using permanent magnet materials. The constant magnetomotive force source in a permanent magnet DC motor is the magnet tile. Replacing electric magnets with permanent magnet tiles offers many advantages, including simpler motor structure, easier maintenance, lighter weight, smaller size, more reliable operation, less copper usage, lower copper consumption, and lower energy consumption.

[0003] The manufacturing process of permanent magnet ferrite tiles includes: fine grinding, forming, sintering, grinding, cleaning, inspection, and packaging. The forming process involves injecting permanent magnet ferrite slurry into a mold cavity and pressing it into shape under a magnetic field. During pressing, water in the slurry is discharged through drainage holes on the upper mold's water-absorbing plate.

[0004] Patent CN207189922U discloses a water-absorbing plate for a reverse-pressure type permanent magnet ferrite tile mold, with reference to... Figure 2-3The system includes a water-absorbing plate body (10), with a non-magnetic plate (11) embedded in the working end face of the water-absorbing plate body (10) and a water storage tank (12) opened on the non-working end face. Vertical water-absorbing holes are opened around the water-absorbing plate body (10) between the water storage tank (12) and the non-magnetic plate (11). The vertical water-absorbing holes include a first water-absorbing section (13) and a second water-absorbing section (14), wherein the cross-sectional area of ​​the first water-absorbing section (13) is larger than the cross-sectional area of ​​the second water-absorbing section (14). The non-magnetic plate (11) is provided with several pressed arc surfaces (15), and vertical water-absorbing holes are arranged around the pressed arc surfaces (15). The spacing between the vertical water-absorbing holes is 5-8mm. Along the arc direction of the pressed arc surface (15), two rows of vertical water-absorbing holes are distributed at the bottom of the arc, and two rows of pinholes are arranged at the ends of both sides of the arc. The spacing between the vertical water-absorbing holes is 4-6mm. The ratio of the cross-sectional area of ​​the first water-absorbing section (13) to the cross-sectional area of ​​the second water-absorbing section (14) is 4:1. The first water-absorbing section (13) has a circular cross-section, the first water-absorbing section (13) is of equal thickness to the water-absorbing plate body (10), and has a diameter of 3.0 mm; the second water-absorbing section (14) has a circular cross-section, the second water-absorbing section (14) is of equal thickness to the non-magnetic plate (11), and has a diameter of 1.5 mm. The first water-absorbing section (13) has a square cross-section, the first water-absorbing section (13) is of equal thickness to the water-absorbing plate body (10), and has a side length of 2.7 mm; the second water-absorbing section (14) has a square cross-section, the second water-absorbing section (14) is of equal thickness to the non-magnetic plate (11), and has a side length of 1.35 mm. The first water-absorbing section (13) and the second water-absorbing section (14) are seamlessly connected at the junction by positioning bolts. A connecting waterway (16) is provided around the water storage tank (12). The water storage tank (12) is connected to the negative pressure pipe (17).

[0005] Patent CN206259248U discloses a water-absorbing plate for the upper mold of a permanent magnet ferrite tile forming mold, with reference to... Figure 4 The device has an upper surface 1 and a bottom surface 2. The upper surface 1 has two inwardly sloping surfaces 3. A U-shaped water channel 6 is provided at the lowest point of the sloping surface 3, which is connected to a drain outlet 7. The bottom surface 2 is an arc surface 4. Vertical water suction holes 5 are evenly distributed between the upper surface 1 and the bottom surface 2. Horizontal water channels 8 are opened on both sides of the upper surface 1, which are connected to the vertical water suction holes 5 near the chamfer of the magnetic tile. The vertical water suction holes 5 are divided into upper and lower sections, with the diameter of the upper section being larger than that of the lower section. The smaller diameter of the lower section of the vertical water suction hole 5 helps to ensure that the water suction hole marks are not obvious when the green body is demolded, while the larger diameter of the upper section allows for rapid water flow. The outer side of the upper surface has a notch 9 that is connected to the horizontal water channel to facilitate processing. The inclination angle of the sloping surface 3 is 10°.

[0006] Currently, the vertical drainage hole of the magnetic tile mold is located opposite to the concave mold cavity. The bottom of the water absorption plate is arc-shaped, and the other side (top) of the arc has a drainage cavity. The drainage cavity is perpendicular to the drainage hole and flush with the upper end of the water absorption hole. This upper mold structure is prone to backflow. That is, once the negative pressure in the drainage cavity is too low, some of the water that is still in the horizontal drainage cavity or vertical drainage hole flows back. When the mold is opened and the blank is taken out, some water droplets fall on the green blank, causing invisible cracks during product sintering.

[0007] To address this issue, we propose a water-absorbing plate for the upper mold of permanent magnet ferrite magnetic tiles, which belongs to the field of magnetic tile molds and solves the problem of water return in existing water-absorbing plates for upper molds of magnetic tiles. Utility Model Content

[0008] The purpose of this utility model is to address the shortcomings of the existing technology mentioned in the background section by proposing a water-absorbing plate for the upper mold of a permanent magnet ferrite tile.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A water-absorbing plate for a permanent magnet ferrite tile upper mold includes an upper surface, a bottom surface, and a drain outlet. The upper surface has two inwardly sloping surfaces, and a U-shaped water groove is provided at the lowest point of the sloping surface. Vertical water-absorbing holes are evenly arranged between the upper surface and the bottom surface, and the lower end of the vertical water-absorbing holes is a return water cavity. Water-absorbing holes are connected to the vertical water-absorbing holes, and the position of the water-absorbing holes is higher than the bottom of the return water cavity. Horizontal water grooves are opened on both sides of the upper surface.

[0011] As a further feature of this invention, the bottom surface is an arc surface.

[0012] As a further improvement in this invention, the U-shaped water trough is connected to the drain outlet.

[0013] As a further improvement in this invention, the horizontal water trough is connected to the vertical water intake hole near the chamfer of the magnetic tile.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: when the negative pressure in the drainage chamber is low, some of the water that still exists in the horizontal drainage chamber or vertical drainage hole will flow back into the return water chamber and will not flow out of the water suction plate, thus avoiding the backflow phenomenon and preventing water droplets from falling on the green blank and causing invisible cracks during product sintering. Attached Figure Description

[0015] Figure 1 This is a perspective view of a water-absorbing plate for the upper mold of a permanent magnet ferrite tile according to the present invention.

[0016] Figure 2 For existing technology: Schematic diagram of the water-absorbing plate structure of the reverse-pressure permanent magnet ferrite tile mold;

[0017] Figure 3 For existing technology: Side view of the water-absorbing plate of a reverse-pressure permanent magnet ferrite tile mold;

[0018] Figure 4 This is a schematic diagram of the water-absorbing plate of the upper mold of a permanent magnet ferrite tile forming mold, which is an existing technology.

[0019] In the diagram: 1. Top surface; 2. Bottom surface; 3. Sloping surface; 4. Curved surface; 5. Water intake hole; 6. Water return cavity; 7. Vertical water intake hole; 8. U-shaped water tank; 9. Drain outlet; 10. Horizontal water tank. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1A water-absorbing plate for a permanent magnet ferrite tile upper mold includes an upper surface 1, a bottom surface 2, and a drain outlet 9. The bottom surface 2 is an arc surface 4. The upper surface 1 has two inwardly sloping surfaces 3, and a U-shaped water trough 8 is provided at the lowest point of the sloping surface 3. The U-shaped water trough 8 is connected to the drain outlet 9. Vertical water-absorbing holes 7 are evenly arranged between the upper surface 1 and the bottom surface 2. The lower end of the vertical water-absorbing holes 7 is a return water cavity 6. Water-absorbing holes 5 are connected to the vertical water-absorbing holes 7, and the position of the water-absorbing holes 5 is higher than the bottom of the return water cavity 6. Horizontal water troughs 10 are opened on both sides of the upper surface 1. The horizontal water troughs 10 are connected to the vertical water-absorbing holes 7 near the chamfer of the magnetic tile. When in use, if the negative pressure in the drain cavity is low, some of the water still in the horizontal drain cavity or vertical drain hole will flow back into the return water cavity and will not flow out of the water-absorbing plate, thus avoiding backflow and preventing water droplets from falling on the green blank and causing invisible cracks during product sintering.

[0025] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. A water-absorbing plate for a permanent magnet ferrite tile upper mold, comprising an upper end face (1), a bottom face (2), and a drain outlet (9), characterized in that, The upper end face (1) has two inward sloping surfaces (3), and a U-shaped water trough (8) is provided at the lowest point of the sloping surface (3). Vertical water suction holes (7) are evenly arranged between the upper end face (1) and the bottom surface (2), and the lower end of the vertical water suction hole (7) is a return water cavity (6). A water suction hole (5) is connected to the vertical water suction hole (7), and the position of the water suction hole (5) is higher than the bottom of the return water cavity (6). Horizontal water troughs (10) are opened on both sides of the upper end face (1).

2. The water-absorbing plate for the upper mold of a permanent magnet ferrite tile according to claim 1, characterized in that, The bottom surface (2) is an arc surface (4).

3. The water-absorbing plate for the upper mold of a permanent magnet ferrite tile according to claim 1, characterized in that, The U-shaped water tank (8) is connected to the drain outlet (9).

4. The water-absorbing plate for the upper mold of a permanent magnet ferrite tile according to claim 1, characterized in that, The horizontal water tank (10) is connected to the vertical water intake hole (7) near the chamfer of the magnetic tile.

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