Magnetic powder profiling die

Abstract

The utility model provides a magnetic powder profiling die which comprises a bottom plate and a die core arranged on the bottom plate, a cavity used for forming the outer surface of a magnetic powder profiling part is formed in the die core and comprises an upper die cavity and a lower die cavity, the upper die cavity comprises a first semicircular face, a second semicircular face and an upper cavity face, and the lower die cavity comprises a second semicircular face and a lower cavity face. The radius of the first semicircular surface is larger than that of the second semicircular surface, and the upper cavity surface is used for conical surface transition of the first semicircular surface and the second semicircular surface; the lower die cavity comprises a third semicircular surface, a fourth semicircular surface and a lower cavity surface, the radius of the third semicircular surface is smaller than that of the fourth semicircular surface, and the lower cavity surface is used for conical surface transition of the third semicircular surface and the fourth semicircular surface; the first semicircular surface and the third semicircular surface are located on the ejection side of the mold cavity, and the first semicircular surface, the second semicircular surface, the third semicircular surface, the fourth semicircular surface, the upper cavity surface and the lower cavity surface are coaxial.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of magnetic material production, and specifically to a magnetic powder pressing mold. Background Art

[0002] Magnetic powder pressing refers to a process for manufacturing magnetic components, usually used to make parts of magnetic materials, such as magnets, inductors, etc. In this process, magnetic powder is usually mixed with a binder and pressed into the desired shape under high pressure. This method is often used to produce magnetic materials that require specific shapes and properties because it can achieve high precision and complex shapes.

[0003] During the magnetic powder pressing process, the existing pressing mold ejector is prone to damage or crushing during the ejection process because there is no draft angle set on the cavity. However, if a single-direction draft angle is set on the upper and lower cavities of the cavity, the ejection end will have a smaller cross-section and a higher density, while the tail will have a larger cross-section and a lower density. This will lead to a decrease in the density consistency of the product, resulting in a smaller cross-section and a higher density at the ejection end, so the original pressing mold needs to be optimized. Summary of the invention

[0004] The problem to be solved by the utility model is to provide a magnetic powder pressing mold to solve the problem that the existing pressing mold is easily damaged or crushed during the ejection process because the ejection angle is not set on the mold cavity, but if a single-direction draft angle is set on the upper mold cavity and the lower mold cavity of the mold cavity, the density consistency of the product will be reduced.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: a magnetic powder pressing mold, comprising a bottom plate and a mold core arranged on the bottom plate, a mold core is provided with a mold cavity for molding the outer surface of the magnetic powder pressing part, the mold cavity comprises an upper mold cavity and a lower mold cavity, the upper mold cavity comprises a first semicircular surface, a second semicircular surface, and an upper cavity surface, the radius of the first semicircular surface is greater than the radius of the second semicircular surface, and the upper cavity surface is used for the transition between the first semicircular surface and the second semicircular surface conical surface; the lower mold cavity comprises a third semicircular surface, a fourth semicircular surface, and a lower cavity surface, the radius of the third semicircular surface is less than the radius of the fourth semicircular surface, and the lower cavity surface is used for the transition between the third semicircular surface and the fourth semicircular surface conical surface; the first semicircular surface and the third semicircular surface are located on the ejection side of the mold cavity, and the first semicircular surface, the second semicircular surface, the third semicircular surface, the fourth semicircular surface, the upper cavity surface, and the lower cavity surface are all coaxial.

[0006] A magnetic powder pressing mold can effectively solve the problem that the existing magnetic powder pressing mold is easy to break during the ejection process, and can maintain the density consistency of the product. By arranging a third semicircular surface at the ejection end of the lower mold cavity, and arranging a fourth semicircular surface with a larger radius than the third semicircular surface at the other end, a conical surface transition is performed by the lower cavity surface to form a draft angle, thereby reducing the situation that ejection damage or ejection crushing easily occurs during the ejection process. In addition, in order to maintain a structure in which the cross-sectional area of ​​the cavity along the ejection direction is the same, a first semicircular surface and a second semicircular surface with a smaller radius than the first semicircular surface are arranged on the upper mold cavity, and a conical surface transition is performed by the lower cavity surface to make the cross-sectional area of ​​the cavity along the ejection direction the same, thereby avoiding the problem that the ejection end portion has a smaller cross-sectional area and a higher density, and the tail portion has a lower density due to a larger cross-sectional area than the ejection end.

[0007] Preferably, the mold core comprises an upper mold core and a lower mold core which are spliced ​​together, the upper cavity surface is arranged on the lower end surface of the upper mold core, and the lower cavity surface is arranged on the upper end surface of the lower mold core.

[0008] Preferably, a boss is provided on the bottom plate, a groove is provided on the lower end surface of the lower mold core, and the boss is embedded in the groove.

[0009] Preferably, two relatively arranged magnetic conductive plates are provided on both sides of the joint of the upper mold core and the lower mold core, and the magnetic conductive plates include a first magnetic conductive plate and a second magnetic conductive plate, the first semicircular surface is arranged at the upper part of the first magnetic conductive plate, the third semicircular surface is arranged at the lower part of the first magnetic conductive plate, the second semicircular surface is arranged at the upper part of the second magnetic conductive plate, and the fourth semicircular surface is arranged at the lower part of the second magnetic conductive plate.

[0010] Preferably, the surfaces of the upper cavity surface and the lower cavity surface are polished to a surface roughness of Ra0.8. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the utility model;

[0012] Figure 2 This is a three-dimensional diagram of the utility model after removing the first magnetic conductive plate and the second magnetic conductive plate;

[0013] Figure 3 It is a three-dimensional diagram of the combination of the upper mold core, the first magnetic conductive plate and the second magnetic conductive plate of the utility model;

[0014] Figure 4 It is a three-dimensional diagram of the combination of the upper mold core, the first magnetic conductive plate and the second magnetic conductive plate of the utility model;

[0015] Figure 5 This is a three-dimensional diagram of the utility model without the upper mold core and the combination of the first magnetic conductive plate and the second magnetic conductive plate;

[0016] Figure 6This is a three-dimensional diagram of the utility model without the upper mold core and the combination of the first magnetic conductive plate and the second magnetic conductive plate;

[0017] The figure shows 1, bottom plate; 1.1, boss; 2, core; 2.1, lower core; 2.1.1, groove; 2.2, upper core; 2.3, first magnetic conductive plate; 2.4, second magnetic conductive plate; 3, cavity; 3.1, upper cavity; 3.1.1, first semicircular surface; 3.1.2, second semicircular surface; 3.1.3, upper cavity surface; 3.2, lower cavity; 3.2.1, third semicircular surface; 3.2.2, fourth semicircular surface; 3.2.3, lower cavity surface. DETAILED DESCRIPTION

[0018] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0019] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0020] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0021] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0022] See also Figure 1 , 2 The magnetic powder pressing mold comprises a bottom plate 1 and a mold core 2. The mold core 2 is formed by splicing an upper mold core 2.2 and a lower mold core 2.1. The upper cavity surface 3.1.3 is arranged on the lower end surface of the upper mold core 2.2, and the lower cavity surface 3.2.3 is arranged on the upper end surface of the lower mold core 2.1. A boss 1.1 is arranged on the bottom plate 1, and a groove 2.1.1 is arranged on the lower end surface of the lower mold core 2.1, and the boss 1.1 is embedded in the groove 2.1.1.

[0023] The mold core 2 is provided with a mold cavity 3 for molding the outer surface of the magnetic powder pressed part. The cross-sectional area of ​​the mold cavity 3 along the ejection direction is the same. The mold cavity 3 includes an upper mold cavity 3.1 and a lower mold cavity 3.2. Figure 3 , 4 Specifically, the upper mold cavity 3.1 includes a first semicircular surface 3.1.1, a second semicircular surface 3.1.2 and an upper cavity surface 3.1.3, please refer to Figure 5 , 6 The lower mold cavity 3.2 includes a third semicircular surface 3.2.1, a fourth semicircular surface 3.2.2 and a lower cavity surface 3.2.3. The radius of the first semicircular surface 3.1.1 is greater than the radius of the second semicircular surface 3.1.2, and the upper cavity surface 3.1.3 is used for the transition between the first semicircular surface 3.1.1 and the second semicircular surface 3.1.2. Similarly, the radius of the third semicircular surface 3.2.1 is smaller than the radius of the fourth semicircular surface 3.2.2, and the lower cavity surface 3.2.3 is used for the transition between the third semicircular surface 3.2.1 and the fourth semicircular surface 3.2.2. This design helps to maintain the consistent density of the product and avoids fragility.

[0024] In addition, two opposing magnetic conductive plates are arranged on both sides of the joint of the upper mold core 2.2 and the lower mold core 2.1, including a first magnetic conductive plate 2.3 and a second magnetic conductive plate 2.4. The first semicircular surface 3.1.1 is arranged on the upper part of the first magnetic conductive plate 2.3, the third semicircular surface 3.2.1 is arranged on the lower part of the first magnetic conductive plate 2.3, the second semicircular surface 3.1.2 is arranged on the upper part of the second magnetic conductive plate 2.4, and the fourth semicircular surface 3.2.2 is arranged on the lower part of the second magnetic conductive plate 2.4.

[0025] Finally, the surfaces of the upper cavity surface 3.1.3 and the lower cavity surface 3.2.3 are polished to a surface roughness of Ra0.8, which helps to reduce friction and reduce the possibility of ejection damage or crushing during the ejection process.

[0026] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.

Claims

1. A magnetic powder pressing die, characterized in that: The invention comprises a bottom plate (1) and a mold core (2) arranged on the bottom plate (1); a mold cavity (3) for molding the outer surface of a magnetic powder pressed part is provided in the mold core (2); the mold cavity (3) comprises an upper mold cavity (3.1) and a lower mold cavity (3.2); the upper mold cavity (3.1) comprises a first semicircular surface (3.1.1), a second semicircular surface (3.1.2), and an upper cavity surface (3.1.3); the radius of the first semicircular surface (3.1.1) is greater than the radius of the second semicircular surface (3.1.2); the upper cavity surface (3.1.3) is used for the conical transition between the first semicircular surface (3.1.1) and the second semicircular surface (3.1.2); the lower mold cavity (3.2) comprises a third semicircular surface ( The third semicircular surface (3.2.1), the fourth semicircular surface (3.2.2), and the lower cavity surface (3.2.3), the radius of the third semicircular surface (3.2.1) is smaller than the radius of the fourth semicircular surface (3.2.2), and the lower cavity surface (3.2.3) is used for the conical transition between the third semicircular surface (3.2.1) and the fourth semicircular surface (3.2.2); the first semicircular surface (3.1.1) and the third semicircular surface (3.2.1) are located on the ejection side of the mold cavity, and the first semicircular surface (3.1.1), the second semicircular surface (3.1.2), the third semicircular surface (3.2.1), the fourth semicircular surface (3.2.2), the upper cavity surface (3.1.3), and the lower cavity surface (3.2.3) are all coaxial.

2. The magnetic powder pressing die according to claim 1, characterized in that: The mold core (2) comprises an upper mold core (2.2) and a lower mold core (2.1) which are spliced ​​together, the upper cavity surface (3.1.3) is arranged on the lower end surface of the upper mold core (2.2), and the lower cavity surface (3.2.3) is arranged on the upper end surface of the lower mold core (2.1).

3. The magnetic powder pressing die according to claim 2, characterized in that: The bottom plate (1) is provided with a boss (1.1), the lower end surface of the lower mold core (2.1) is provided with a groove (2.1.1), and the boss (1.1) is embedded in the groove (2.1.1).

4. A magnetic powder pressing die according to claim 2 or 3, characterized in that: Two oppositely arranged magnetic conductive plates are arranged on both sides of the joint of the upper mold core (2.2) and the lower mold core (2.1), and the magnetic conductive plates include a first magnetic conductive plate (2.3) and a second magnetic conductive plate (2.4), the first semicircular surface (3.1.1) is arranged on the upper part of the first magnetic conductive plate (2.3), the third semicircular surface (3.2.1) is arranged on the lower part of the first magnetic conductive plate (2.3), the second semicircular surface (3.1.2) is arranged on the upper part of the second magnetic conductive plate (2.4), and the fourth semicircular surface (3.2.2) is arranged on the lower part of the second magnetic conductive plate (2.4).

5. The magnetic powder pressing mold according to claim 1, characterized in that: The surfaces of the upper cavity surface (3.1.3) and the lower cavity surface (3.2.3) are polished to a surface roughness of Ra0.8.

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