Iron oxide magnetic core sintering mold

Abstract

The utility model discloses an iron oxide magnetic core sintering mould, which relates to the technical field of moulds and is characterized by comprising an upper mould and a lower mould, a demoulding mechanism is arranged on the outer side of the lower mould and comprises an electromagnetic component and an auxiliary cooling component, and the electromagnetic component comprises a transition layer fixedly mounted on the outer side of the lower mould. An electromagnetic coil is fixedly installed on the outer circle face of the transition layer, an upper wiring end is fixedly installed at the upper end of the electromagnetic coil, a lower wiring end extending to the top of the transition layer is fixedly installed at the lower end of the electromagnetic coil, and the auxiliary cooling assembly comprises a heat-resisting alloy layer fixedly installed on the outer side of the transition layer. Comprising an electromagnetic assembly, non-contact separation of a mold and a magnetic core is achieved through magnetic force so that scratches, abrasion and the like can be avoided, and meanwhile an auxiliary cooling assembly accelerates cooling through a heat-resisting alloy layer, a transverse heat dissipation ring and a high-heat-conduction phase-change material in a vertical heat dissipation pipe so that the magnetic core can reach the suitable demolding temperature more quickly; therefore, the demolding problem is effectively solved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to an iron oxide magnetic core sintering mold. Background Technology

[0002] In the manufacturing process of iron oxide magnetic cores, sintering molds undoubtedly play a crucial role. They are not only key tools in the forming process, but also directly affect the quality and performance of the final product.

[0003] However, in the crucial demolding process, after the magnetic core is sintered at high temperature in the mold, significant friction is generated between the material's hardness and the mold's inner wall. This friction can easily cause scratches, wear, or even breakage on the magnetic core surface during demolding, severely affecting the product's appearance quality and yield. Therefore, we propose a novel sintering mold for iron oxide magnetic cores. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a sintering mold for iron oxide magnetic cores, which solves the problem that during demolding, the high-temperature sintered magnetic core comes into close contact with the mold, generating large frictional forces that easily lead to scratches, wear, and damage on the magnetic core surface, affecting product appearance and yield.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an iron oxide magnetic core sintering mold, comprising an upper mold and a lower mold, wherein a demolding mechanism is provided on the outer side of the lower mold;

[0008] The demolding mechanism includes an electromagnetic component and an auxiliary cooling component;

[0009] The electromagnetic component includes a transition layer fixedly installed on the outside of the lower mold, an electromagnetic coil fixedly installed on the outer circular surface of the transition layer, an upper terminal fixedly installed on the upper end of the electromagnetic coil, and a lower terminal fixedly installed on the lower end of the electromagnetic coil extending to the top of the transition layer.

[0010] The auxiliary cooling component includes a heat-resistant alloy layer fixedly installed on the outside of the transition layer. Several transverse heat dissipation rings are fixedly installed on the outer circular surface of the heat-resistant alloy layer. Several vertical heat dissipation pipes communicating with the inner cavity of the transverse heat dissipation rings are fixedly installed on the transverse heat dissipation rings. Several guide post grooves are opened on the top of the heat-resistant alloy layer.

[0011] Preferably, the transition layer is made of a metal material with thermal conductivity to effectively slow down the thermal stress generated in the iron oxide magnetic core during sintering.

[0012] Preferably, the interior of both the horizontal heat dissipation ring and the vertical heat dissipation pipe is filled with a phase change material with high thermal conductivity to accelerate the cooling of the mold and the iron oxide magnetic core.

[0013] Preferably, the lower mold is made of a high thermal conductivity ceramic layer to improve the overall thermal conductivity of the mold.

[0014] Preferably, a sealing plate is fixedly installed at the center of the bottom of the upper mold, and the outer diameter of the sealing plate is equal to the inner diameter of the heat-resistant alloy layer.

[0015] Preferably, the sealing sheet is made of shape memory metal.

[0016] Preferably, the bottom of the upper mold is fixedly installed with several guide pillars adapted to the guide pillar groove on the outside of the sealing thin plate to ensure precise positioning between the upper mold and the lower mold.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a method with the following beneficial effects:

[0019] 1. This utility model effectively solves the demolding problem of iron oxide magnetic cores after sintering by setting up a demolding mechanism, including an electromagnetic component and an auxiliary cooling component. The electromagnetic component utilizes electromagnetic principles to achieve non-contact separation between the mold and the magnetic core through the magnetic force generated by the electromagnetic coil when demolding is required. This greatly reduces the friction caused by direct contact, thereby avoiding scratches, wear, or even damage to the surface of the magnetic core, and improving the appearance quality and pass rate of the product.

[0020] 2. This utility model incorporates auxiliary cooling components, including a heat-resistant alloy layer, a horizontal heat dissipation ring, and vertical heat dissipation pipes. These structures work together to accelerate the cooling process of the mold and the iron oxide magnetic core. In particular, the horizontal heat dissipation ring and vertical heat dissipation pipes are filled with a phase change material with high thermal conductivity, which can more effectively absorb and transfer heat, further improving cooling efficiency. This allows the magnetic core to reach the suitable demolding temperature more quickly, thus improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the lower mold structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the upper mold structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the lower mold of this utility model.

[0025] In the picture:

[0026] 1. Upper mold;

[0027] 2. Lower mold;

[0028] 3. Demolding mechanism;

[0029] 31. Electromagnetic components;

[0030] 311. Transition layer; 312. Electromagnetic coil; 313. Upper terminal; 314. Lower terminal;

[0031] 32. Auxiliary cooling components;

[0032] 321. Heat-resistant alloy layer; 322. Horizontal heat dissipation ring; 323. Vertical heat dissipation pipe; 324. Guide post groove;

[0033] 4. Sealing sheet;

[0034] 5. Guide post. Detailed Implementation

[0035] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0036] This utility model provides a technical solution:

[0037] Please see Figures 1-4 The sintering mold for iron oxide magnetic cores includes an upper mold 1 and a lower mold 2, with a demolding mechanism 3 provided on the outer side of the lower mold 2.

[0038] The demolding mechanism 3 includes an electromagnetic component 31 and an auxiliary cooling component 32.

[0039] The electromagnetic component 31 includes a transition layer 311 fixedly installed on the outside of the lower mold 2. An electromagnetic coil 312 is fixedly installed on the outer circular surface of the transition layer 311. An upper terminal 313 is fixedly installed on the upper end of the electromagnetic coil 312, and a lower terminal 314 extending to the top of the transition layer 311 is fixedly installed on the lower end of the electromagnetic coil 312. The electromagnetic coil 312 is fixed through the transition layer 311, and the upper terminal 313 and the lower terminal 314 are energized to generate a magnetic field. The magnetic force is used to achieve non-contact separation between the mold and the magnetic core, reducing friction and avoiding damage to the surface of the magnetic core.

[0040] The auxiliary cooling component 32 includes a heat-resistant alloy layer 321 fixedly installed on the outside of the transition layer 311. Several horizontal heat dissipation rings 322 are fixedly installed on the outer circular surface of the heat-resistant alloy layer 321. Several vertical heat dissipation pipes 323 communicating with the inner cavity of the horizontal heat dissipation rings 322 are fixedly installed on the horizontal heat dissipation rings 322. Several guide post grooves 324 are opened on the top of the heat-resistant alloy layer 321. The cooling of the mold and magnetic core is accelerated by the heat-resistant alloy layer 321 and the horizontal heat dissipation rings 322 and vertical heat dissipation pipes 323 on its outer side. The phase change material improves the cooling efficiency and reduces the demolding difficulty. At the same time, the guide post grooves 324 ensure the precise positioning of the mold.

[0041] Furthermore, the transition layer 311 is made of a metal material with thermal conductivity to effectively alleviate the thermal stress generated by the iron oxide core during sintering. The thermally conductive metal material used in the transition layer 311 can alleviate the thermal stress generated by the iron oxide core during sintering, prevent mold deformation, and promote heat transfer to ensure sintering quality.

[0042] Furthermore, the interior of both the horizontal heat dissipation ring 322 and the vertical heat dissipation pipe 323 is filled with a phase change material with high thermal conductivity to accelerate the cooling of the mold and the iron oxide magnetic core. Through the high thermal conductivity phase change material filled in the horizontal heat dissipation ring 322 and the vertical heat dissipation pipe 323, the residual heat of the mold and the magnetic core can be quickly absorbed and transferred, accelerating the cooling, reducing the difficulty of demolding, and improving production efficiency.

[0043] Furthermore, the lower mold 2 is made of a high thermal conductivity ceramic layer to improve the overall thermal conductivity of the mold. By using a high thermal conductivity ceramic layer in the lower mold 2, heat can be transferred quickly to ensure that the iron oxide magnetic core is heated evenly, improve sintering efficiency, and at the same time enhance the overall thermal conductivity of the mold and optimize the sintering process.

[0044] Furthermore, a sealing plate 4 is fixedly installed at the center of the bottom of the upper mold 1. The outer diameter of the sealing plate 4 is equal to the inner diameter of the heat-resistant alloy layer 321. The sealing plate 4 ensures that a closed sintering space is formed between the upper mold 1 and the lower mold 2, preventing gas or material leakage during the sintering process and ensuring sintering quality. Its diameter is designed to match the heat-resistant alloy layer 321 to ensure a tight fit.

[0045] Furthermore, the sealing sheet 4 is made of shape memory metal. By using shape memory metal to make the sealing sheet 4, it can maintain shape stability at high temperature, ensure sealing performance, prevent gas or material leakage during sintering, ensure sintering quality, and enhance mold durability.

[0046] Furthermore, the bottom of the upper mold 1 is fixedly installed with several guide posts 5 that are adapted to the guide post groove 324 on the outside of the sealing thin plate 4. This is used to ensure the precise positioning between the upper mold 1 and the lower mold 2. By adapting the guide posts 5 to the guide post groove 324, the precise positioning of the upper mold 1 and the lower mold 2 is ensured, thereby improving the size and shape consistency of the sintered magnetic core, ensuring product quality, and facilitating mold closing and demolding operations, thus improving production efficiency.

[0047] In practical use, the working principle of this utility model is as follows:

[0048] When using this iron oxide magnetic core sintering mold, the iron oxide magnetic core raw material to be sintered is first placed in the lower mold 2, and then the upper mold 1 is closed, so that the guide post 5 is accurately inserted into the guide post groove 324, ensuring precise positioning between the upper mold 1 and the lower mold 2. At the same time, the sealing plate 4 is tightly fitted with the lower mold 2 to form a closed sintering space. This sealing plate 4 is made of shape memory metal, which can maintain a stable shape and sealing performance at high temperatures, effectively preventing gas or material leakage during the sintering process and ensuring sintering quality.

[0049] The entire mold is then placed into a sintering furnace for high-temperature sintering. During the sintering process, the high thermal conductivity ceramic layer used in the lower mold 2 can rapidly transfer heat, ensuring uniform heating of the iron oxide core and improving sintering efficiency. Simultaneously, the transition layer 311, made of a thermally conductive metallic material, not only effectively alleviates the thermal stress generated in the iron oxide core during sintering, preventing mold deformation or damage, but also further promotes heat transfer and improves sintering quality.

[0050] After sintering, the mold is removed from the sintering furnace and cooled to a certain temperature. Then, the electromagnetic coil 312 is energized through the upper terminal 313 and the lower terminal 314 to generate a magnetic field. Due to the principle of electromagnetic induction, the transition layer 311 and its internal iron oxide magnetic core are subjected to magnetic force, generating a repulsive force against the mold wall. This creates a tiny gap between the iron oxide magnetic core and the inner wall of the mold, thus achieving easy demolding. This process not only reduces scratches, wear, and even damage caused by friction in traditional demolding methods but also greatly improves demolding efficiency and product quality.

[0051] Meanwhile, the auxiliary cooling component 32 also plays a crucial role during the demolding process. The heat-resistant alloy layer 321 effectively isolates external heat, protecting the internal electromagnetic component 31 from high temperatures and extending its service life. The phase change material with high thermal conductivity filled inside the horizontal heat dissipation ring 322 and the vertical heat dissipation pipe 323 can quickly absorb the residual heat from the mold and the iron oxide magnetic core, transferring the heat to the outside through a phase change process, thereby accelerating the cooling process and further reducing the difficulty of demolding.

[0052] Finally, because the upper mold 1 and lower mold 2 are precisely positioned through the guide pillars 5 and guide pillar grooves 324, the size and shape of the iron oxide magnetic cores sintered each time remain consistent, improving the product yield and consistency. Meanwhile, the use of the sealing plate 4 ensures that the mold maintains good sealing performance even after multiple uses, further guaranteeing the sintering quality of the product.

[0053] In summary, the iron oxide magnetic core sintering mold of this utility model, through the synergistic effect of the electromagnetic component 31 and the auxiliary cooling component 32, effectively solves the problems of scratches, wear and even breakage that are easily generated during the demolding process of traditional sintering molds, improves the quality and pass rate of products, and reduces production costs and labor intensity, and has broad application prospects and market value.

[0054] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A sintering mold for iron oxide magnetic cores, comprising an upper mold (1) and a lower mold (2), characterized in that: A demolding mechanism (3) is provided on the outer side of the lower mold (2); The demolding mechanism (3) includes an electromagnetic component (31) and an auxiliary cooling component (32); The electromagnetic component (31) includes a transition layer (311) fixedly installed on the outside of the lower mold (2), an electromagnetic coil (312) fixedly installed on the outer circular surface of the transition layer (311), an upper terminal (313) fixedly installed on the upper end of the electromagnetic coil (312), and a lower terminal (314) extending to the top of the transition layer (311) fixedly installed on the lower end of the electromagnetic coil (312). The auxiliary cooling component (32) includes a heat-resistant alloy layer (321) fixedly installed on the outside of the transition layer (311). A plurality of horizontal heat dissipation rings (322) are fixedly installed on the outer circular surface of the heat-resistant alloy layer (321). A plurality of vertical heat dissipation pipes (323) communicating with the inner cavity of the horizontal heat dissipation rings (322) are fixedly installed on the horizontal heat dissipation rings (322). A plurality of guide grooves (324) are opened on the top of the heat-resistant alloy layer (321).

2. The sintering mold for iron oxide magnetic cores according to claim 1, characterized in that: The transition layer (311) is made of a metal material with thermal conductivity to effectively slow down the thermal stress generated in the iron oxide core during sintering.

3. The sintering mold for iron oxide magnetic cores according to claim 1, characterized in that: The interior of the horizontal heat dissipation ring (322) and the vertical heat dissipation pipe (323) are both filled with phase change material with high thermal conductivity to accelerate the cooling of the mold and the iron oxide magnetic core.

4. The sintering mold for iron oxide magnetic cores according to claim 1, characterized in that: The lower mold (2) is made of a high thermal conductivity ceramic layer to improve the overall thermal conductivity of the mold.

5. The sintering mold for iron oxide magnetic cores according to claim 1, characterized in that: A sealing plate (4) is fixedly installed at the center of the bottom of the upper mold (1), and the outer diameter of the sealing plate (4) is equal to the inner diameter of the heat-resistant alloy layer (321).

6. The sintering mold for iron oxide magnetic cores according to claim 5, characterized in that: The sealing sheet (4) is made of shape memory metal.

7. The sintering mold for iron oxide magnetic cores according to claim 5, characterized in that: The bottom of the upper mold (1) is fixedly installed with several guide pillars (5) that are adapted to the guide pillar groove (324) on the outside of the sealing thin plate (4) to ensure the precise positioning between the upper mold (1) and the lower mold (2).

Images