Cold isostatic pressing equipment for permanent magnet material production

Abstract

The utility model discloses cold isostatic pressing equipment for permanent magnet material production, which comprises a die body and a U-shaped plate, the die body is arranged in the middle of the U-shaped plate, a die cavity with an upper opening and a lower opening is vertically formed in the middle of the die body, a feeding groove is obliquely arranged on one side of the opening at the upper end of the die cavity, and pressing blocks are arranged in the openings at the upper end and the lower end of the die cavity. The opposite end faces of the pressing blocks protrude to form connecting parts, lead screw holes are formed in the connecting parts, lead screws are in threaded connection with the interiors of the lead screw holes, and a driving mechanism for driving the pressing blocks to get close inwards or be opened outwards is installed on the U-shaped plate. The cold pressing device is simple in structure, oil pressure is not needed, cold pressing operation is directly completed through the lead screw, the defect of oil pressure is overcome, the stroke is reduced through the pressing blocks which synchronously move up and down, cold pressing operation can be completed more quickly, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnetic material production, in particular to cold isostatic pressing equipment for permanent magnetic material production. Background Art

[0002] NdFeB is a tetragonal crystal formed by neodymium, iron and boron (Nd2Fe14B). This type of magnet is a permanent magnet with magnetic properties second only to the absolute zero holmium magnet. It is also the most commonly used rare earth magnet. NdFeB magnets are widely used in electronic products such as hard drives, mobile phones, headphones, and battery-powered tools.

[0003] NdFeB materials need to go through the step of pressing in the production process in order to initially shape them from a powder state and then sinter them. During pressing, the industry widely uses cold isostatic presses for this process. Cold isostatic presses place materials loaded into sealed, elastic molds in a container containing liquid or gas, and use liquid or gas to apply a certain pressure to it to press the materials into a solid to obtain a blank of the original shape. The liquid used for pressure is generally oil. Oil pressure technology has some common disadvantages, such as high pollution, high cost, flammable safety hazards, and prone to explosion. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a cold isostatic pressing device for permanent magnet material production, which performs cold pressing by rotating a screw rod and can perform synchronous pressing up and down, thus solving the problems mentioned in the background technology.

[0005] The utility model is realized through the following technical scheme: a cold isostatic pressing device for permanent magnetic material production, comprising a mold body and a U-shaped plate, wherein the mold body is arranged in the middle of the U-shaped plate, a mold cavity with upper and lower openings is vertically formed in the middle of the mold body, a feeding groove is inclinedly arranged on one side of the upper opening of the mold cavity, a pressing block is arranged in the openings of the upper and lower ends of the mold cavity, and a connecting part is protruded on the opposite end faces of the pressing block, a screw rod hole is arranged inside the connecting part, and a screw rod is threadedly connected in the screw rod hole, a first sealed bearing is embedded and installed at the top and bottom surfaces of the U-shaped plate facing the screw rod, the opposite ends of the screw rod are installed in the inner ring of the sealed bearing, and a driving mechanism for driving the pressing block to move inward or open outward is installed on the U-shaped plate.

[0006] As a preferred technical solution, the driving mechanism includes a motor, a shaft, multiple second sealed bearings, a first synchronous wheel, a second synchronous wheel and a synchronous belt. Mounting holes are provided on the top and bottom surfaces of the U-shaped plate. The second sealed bearings are installed in the mounting holes. Both ends of the shaft are installed in the inner ring of the second sealed bearing. Multiple first synchronous wheels are installed on the shaft, and the first synchronous wheels are arranged close to the second sealed bearings. The second synchronous wheels are installed on the screw rod. Synchronous belts are installed on the relative first synchronous wheels and second synchronous wheels. The motor is installed on the top surface of the U-shaped plate, and the rotating shaft of the motor is fixedly connected to the top surface of the shaft.

[0007] As a preferred technical solution, the outer side surface of the pressing block contacts the inner wall surface of the mold cavity, and a gap is formed between the upper pressing block and the feed trough for the raw material to pass through.

[0008] As a preferred technical solution, a bottom plate is installed on the bottom surface of the U-shaped plate.

[0009] As a preferred technical solution, fixing frames are installed on both sides of the mold body, and the other ends of the fixing frames are installed on the U-shaped plates.

[0010] As a preferred technical solution, the motor is a reduction motor.

[0011] The beneficial effects of the utility model are as follows: the utility model has a simple structure, does not need to use oil pressure, directly completes the cold pressing operation through a screw rod, avoids the disadvantages of oil pressure, and reduces the stroke by the pressing block that moves up and down synchronously, can complete the cold pressing operation faster, and increases production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of the utility model after the mold body is removed;

[0015] Figure 3 It is a structural schematic diagram of the mold body in the utility model.

[0016] Among them, 1. mold body; 2. U-shaped plate; 3. feed trough; 4. pressure block; 5. connection part; 6. screw rod; 7. motor; 8. shaft rod; 9. first synchronous wheel; 10. second synchronous wheel; 11. synchronous belt; 12. bottom plate; 13. fixed frame; 14. mold cavity. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0018] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0019] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a cold isostatic pressing device for producing permanent magnetic materials of the utility model comprises a mold body 1 and a U-shaped plate 2, wherein the mold body 1 is arranged in the middle of the U-shaped plate 2, and a mold cavity 14 with upper and lower openings is vertically formed in the middle of the mold body 1, and a feeding groove 3 is inclinedly arranged on one side of the upper opening of the mold cavity 14, and a pressing block 4 is arranged in the openings at the upper and lower ends of the mold cavity 14, and a connecting portion 5 is protruded on the opposite end faces of the pressing block 4, and a screw hole is arranged inside the connecting portion 5, and a screw 6 is threadedly connected in the screw hole, and a first sealed bearing is embedded and installed on the top and bottom surfaces of the U-shaped plate 2 opposite to the screw 6, and the opposite ends of the screw 6 are installed in the inner ring of the sealed bearing, and a driving mechanism for driving the pressing block 4 to move inward or open outward is installed on the U-shaped plate 2.

[0021] In this embodiment, the driving mechanism includes a motor 7, a shaft 8, a plurality of second sealed bearings, a first synchronous wheel 9, a second synchronous wheel 10 and a synchronous belt 11. The top and bottom surfaces of the U-shaped plate 2 are provided with mounting holes, the second sealed bearings are installed in the mounting holes, the two ends of the shaft 8 are installed in the inner ring of the second sealed bearing, the plurality of first synchronous wheels 9 are installed on the shaft 8, and the first synchronous wheels 9 are arranged close to the second sealed bearing, the second synchronous wheels 10 are installed on the screw rod 6, the first synchronous wheels 9 and the second synchronous wheels 10 are installed with synchronous belts 11, the motor 7 is installed on the top surface of the U-shaped plate 2, and the rotating shaft of the motor 7 is fixedly connected to the top surface of the shaft 8;

[0022] Among them, the threads of the upper and lower screws are arranged oppositely, so after the synchronous belt synchronously drives the second synchronous wheel and the screw to rotate, the screw can synchronously drive the connecting part and the pressure block to move inward and open outward.

[0023] In this embodiment, the outer side surface of the pressing block 4 contacts the inner wall surface of the mold cavity 14, and a gap is formed between the upper pressing block 4 and the feed trough 3 for the raw material to pass through, which increases the tightness between the pressing block and the mold cavity and also makes the pressing block move up and down only along the inner wall surface of the mold cavity.

[0024] In this embodiment, a bottom plate 12 is installed on the bottom surface of the U-shaped plate 2, and the bottom plate can provide bottom support for the U-shaped plate and the mold body to avoid tipping over.

[0025] In this embodiment, fixing frames 13 are installed on both sides of the mold body 1, and the other ends of the fixing frames 13 are installed on the U-shaped plate 2, and the mold body is fixed on the U-shaped plate by fixing parts.

[0026] In this embodiment, the motor 7 is a reduction motor, which can drive the shaft to rotate stably and at a uniform speed.

[0027] When in use, the magnet powder can be poured into the mold cavity along the feed slot, and the opening below the mold cavity is blocked by the pressing block below, so that the poured powder will not flow out;

[0028] After the above is completed, the motor can be started directly, the start of the motor drives the shaft rod, the shaft rod synchronously drives multiple first synchronous wheels, the rotation of the first synchronous wheel synchronously drives the second synchronous wheel through the synchronous belt, the rotation of the second synchronous wheel drives the screw rod, and the rotating screw rod can synchronously drive the pressing block to move inward, and the stroke is reduced by the pressing block moving up and down synchronously, so that the cold pressing operation can be completed faster, and the production efficiency is increased;

[0029] After starting the motor in reverse, the screw rod can drive the connection part and the pressure block to open outward synchronously. After the pressure block below is moved out of the opening at the lower end of the mold cavity, the internal embryo body can be stably brought out of the mold cavity along with the pressure block below, which is convenient for material removal. The above operation does not require the use of oil pressure, avoiding the shortcomings of oil pressure and increasing safety.

[0030] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A cold isostatic pressing device for permanent magnetic material production, characterized in that: The invention comprises a mold body (1) and a U-shaped plate (2), wherein the mold body (1) is arranged in the middle of the U-shaped plate (2), a mold cavity (14) with upper and lower openings is vertically formed in the middle of the mold body (1), a feeding trough (3) is obliquely arranged on one side of the upper opening of the mold cavity (14), a pressing block (4) is arranged in the openings at the upper and lower ends of the mold cavity (14), a connecting portion (5) is protruded on the opposite end faces of the pressing block (4), a screw rod hole is arranged inside the connecting portion (5), a screw rod (6) is threadedly connected in the screw rod hole, a first sealed bearing is embedded and installed at the top and bottom surfaces of the U-shaped plate (2) opposite to the screw rod (6), the opposite ends of the screw rod (6) are installed in the inner ring of the sealed bearing, and a driving mechanism for driving the pressing block (4) to move inward or open outward is installed on the U-shaped plate (2).

2. The cold isostatic pressing equipment for permanent magnetic material production according to claim 1, characterized in that: The driving mechanism comprises a motor (7), a shaft (8), a plurality of second sealed bearings, a first synchronous wheel (9), a second synchronous wheel (10) and a synchronous belt (11). The top surface and the bottom surface of the U-shaped plate (2) are provided with mounting holes, the second sealed bearings are mounted in the mounting holes, the two ends of the shaft (8) are mounted in the inner ring of the second sealed bearing, the plurality of first synchronous wheels (9) are mounted on the shaft (8), and the first synchronous wheels (9) are arranged close to the second sealed bearing, the second synchronous wheels (10) are mounted on the screw rod (6), the first synchronous wheels (9) and the second synchronous wheels (10) are mounted with synchronous belts (11), the motor (7) is mounted on the top surface of the U-shaped plate (2), and the rotating shaft of the motor (7) is fixedly connected to the top surface of the shaft (8).

3. The cold isostatic pressing equipment for permanent magnetic material production according to claim 1, characterized in that: The outer side surface of the pressing block (4) contacts the inner wall surface of the mold cavity (14), and a gap is formed between the upper pressing block (4) and the feed trough (3) for the raw materials to pass through.

4. The cold isostatic pressing equipment for permanent magnetic material production according to claim 1, characterized in that: A bottom plate (12) is installed on the bottom surface of the U-shaped plate (2).

5. The cold isostatic pressing equipment for permanent magnetic material production according to claim 1, characterized in that: Fixed frames (13) are installed on both sides of the mold body (1), and the other ends of the fixed frames (13) are installed on the U-shaped plate (2).

6. The cold isostatic pressing equipment for producing permanent magnetic materials according to claim 2, characterized in that: The motor (7) is a reduction motor.

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