Magnetic core forming die

Abstract

The utility model discloses a magnetic core forming die which comprises a middle die assembly, a middle die assembly, a lower die assembly, an upper die assembly, a lower die assembly, an upper die assembly and a lower die assembly, and is characterized in that the middle die assembly comprises a middle die plate and a core rod; the upper punching assembly comprises a first upper punch, a second upper punch and two first driving parts, the first upper punch and the second upper punch are arranged above the middle die plate in a lifting mode, and the two first driving parts drive the first upper punch and the second upper punch to stretch into the cavity so as to press a first upper step and a second upper step; the lower punching assembly comprises a first lower punch, a second lower punch, a third lower punch, a fourth lower punch and four second driving pieces, and the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are arranged below the middle die assembly in a lifting mode. And the four second driving pieces respectively drive the first lower punch, the second lower punch, the third lower punch and the fourth lower punch to extend into the cavity so as to press a first lower step, a second lower step, a third lower step and a fourth lower step.

Description

Technical Field

[0001] The present application relates to the technical field of powder metallurgy, and in particular to a magnetic core forming die. Background Art

[0002] The magnetic core refers to a sintered magnetic metal oxide composed of a mixture of various iron oxides, and is a commonly used component in electronic devices. When the magnetic core is formed, the powder is first placed in the mold cavity of the mother mold, and then the upper mold and the lower mold are extended into the mold cavity and the powder is squeezed at the same time, so that the powder in the mold cavity is squeezed into a magnetic core. In the pressing of the magnetic core, a magnetic core forming mold is often used to assist in the pressing.

[0003] However, when the bottom thickness and wall thickness of the magnetic core are thin and there are many steps, the density of each step is uneven after pressing and forming, which makes it easy to crack and affect the product quality. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a magnetic core forming die, which can adjust the corresponding driving parts according to the density requirements of each step to ensure the consistency of the density of each step, and has a wide adjustment range, simple operation, and improves product precision and product quality.

[0005] The magnetic core forming mold according to the embodiment of the present application is used to produce a magnetic core, the upper end of the magnetic core is provided with a first upper step and a second upper step, the lower end of the magnetic core is provided with a first lower step, a second lower step, a third lower step and a fourth lower step, and is characterized in that the magnetic core forming mold comprises: a middle mold assembly, including a middle mold plate and a core rod, the middle mold plate is provided with a cavity, and the core rod is inserted into the cavity; an upper punch assembly, including a first upper punch, a second upper punch and two first driving members, the first upper punch and the second upper punch are lifted and lowered above the middle mold plate, the two first driving members are respectively connected to the first upper punch and the second upper punch in a one-to-one correspondence, and the two first driving members respectively drive the first upper punch and the second upper punch to move upward and downward. The punch extends into the mold cavity to press out the first upper step and the second upper step; the lower punch assembly includes a first lower punch, a second lower punch, a third lower punch, a fourth lower punch and four second driving members, the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are lifted and lowered below the middle die assembly, the four second driving members are respectively connected to the first lower punch, the second lower punch, the third lower punch and the fourth lower punch in a one-to-one correspondence, and the four second driving members respectively drive the first lower punch, the second lower punch, the third lower punch and the fourth lower punch to extend into the mold cavity to press out the first lower step, the second lower step, the third lower step and the fourth lower step.

[0006] The magnetic core forming mold described in the embodiment of the present application has at least the following beneficial effects: by using two first driving members to respectively drive the first upper punch and the second upper punch to move, and four second driving members to respectively drive the first lower punch, the second lower punch, the third lower punch, and the fourth lower punch to move, so as to respectively press out the first upper step, the second upper step, the first lower step, the second lower step, the third lower step, and the fourth lower step, so that the corresponding driving members can be adjusted according to the density requirements of each step to ensure the consistency of the density of each step, and the adjustment range is wide, the operation is simple, and the product precision and product quality are improved.

[0007] According to the magnetic core forming mold described in the embodiment of the present application, the first upper punch and the second upper punch are coaxially arranged, the first upper punch is located on the inner side of the second upper punch, the bottom surface of the first upper punch is lower than the top surface of the second upper punch and higher than the bottom surface of the second upper punch, and the inner wall of the first upper punch abuts against the outer wall of the core rod.

[0008] According to the magnetic core forming mold described in the embodiment of the present application, the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are coaxially arranged, the second lower punch, the third lower punch and the fourth lower punch are all arranged on the inner side of the first lower punch, and the second lower punch, the third lower punch and the fourth lower punch are all abutted against the outer wall of the core rod.

[0009] According to the magnetic core forming die described in the embodiment of the present application, the second lower punch, the third lower punch and the fourth lower punch all protrude from the top surface of the first lower punch, and the outer wall of the fourth lower punch abuts against the inner wall of the second upper punch.

[0010] According to the magnetic core forming mold described in the embodiment of the present application, the top surface of the fourth lower punch is provided with a first extension portion and a second extension portion, the first extension portion and the second extension portion are respectively extended along the inner wall and the outer wall of the fourth lower punch, and the first extension portion abuts against the inner wall of the second upper punch.

[0011] According to the magnetic core forming die described in the embodiment of the present application, a protrusion is provided on the bottom surface of the second upper punch, and the protrusion is located at both ends of the second upper punch, and the protrusion is abutted against the first extension portion.

[0012] According to the magnetic core forming mold described in the embodiment of the present application, the upper punch assembly also includes an upper template, the upper template is raised and lowered above the middle template, the first driving member is arranged on the upper template, and the first driving member is respectively connected to the first upper punch and the second upper punch in a one-to-one correspondence.

[0013] According to the magnetic core forming mold described in the embodiment of the present application, the lower punch assembly also includes a lower template, the lower template is lifted and arranged below the middle template, the second driving member is arranged on the lower template, and the second driving member and the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are lifted and arranged on the lower template.

[0014] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 is a first structural schematic diagram of a magnetic core;

[0017] Figure 2 is a second structural schematic diagram of the magnetic core;

[0018] Figure 3 This is a structural schematic diagram of a magnetic core forming mold according to an embodiment of the present application;

[0019] Figure 4 This is a first exploded view of the magnetic core forming mold of an embodiment of the present application;

[0020] Figure 5 This is a second exploded view of the magnetic core forming mold according to an embodiment of the present application.

[0021] Description of reference numerals:

[0022] Magnetic core 100; first upper step 110; second upper step 120; first lower step 130; second lower step 140; third lower step 150; fourth lower step 160; groove 170; gap 180; recess 190; middle template 210; core rod 220; cavity 230; first upper punch 310; second upper punch 320; bump 321; first lower punch 410; second lower punch 420; third lower punch 430; fourth lower punch 440; first extension 441; second extension 442. DETAILED DESCRIPTION

[0023] The embodiments of the present application 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 application, and cannot be understood as limiting the present application.

[0024] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0027] Reference Figure 1 and Figure 2 , the embodiment of the present application provides a magnetic core forming mold for producing a magnetic core 100. Among them, the upper end of the magnetic core 100 is provided with a first upper step 110 and a second upper step 120, and the lower end of the magnetic core 100 is provided with a first lower step 130, a second lower step 140, a third lower step 150 and a fourth lower step 160, and the surface of the second upper step 120 is provided with a groove 170, and the groove 170 is connected to the fourth step. Further, the surface of the fourth step is higher than the surface of the second step, so that a gap 180 is formed between the second step and the fourth step, and the gap 180 is connected to the groove 170. It can be imagined that a recessed portion 190 is provided on both side edges of the fourth step.

[0028] Reference Figures 3 to 5The magnetic core 100 forming mold includes: a middle mold assembly, including a middle mold plate 210 and a core rod 220, the middle mold plate 210 is provided with a cavity 230, and the core rod 220 is inserted into the cavity 230; an upper punch assembly, including a first upper punch 310, a second upper punch 320 and two first driving members, the first upper punch 310 and the second upper punch 320 are lifted and arranged above the middle mold plate 210, the two first driving members are respectively connected to the first upper punch 310 and the second upper punch 320 in a one-to-one correspondence, and the two first driving members respectively drive the first upper punch 310 and the second upper punch 320 to extend into the cavity 230 to press out the first upper step 110 and the second upper step 120; a lower punch assembly, including a first lower punch 4 10. The second lower punch 420, the third lower punch 430, the fourth lower punch 440 and four second driving members. The first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 are lifted and lowered below the middle die assembly. The four second driving members are respectively connected to the first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 in a one-to-one correspondence. The four second driving members respectively drive the first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 to extend into the mold cavity 230 to press out the first lower step 130, the second lower step 140, the third lower step 150 and the fourth lower step 160.

[0029] By using two first driving members to respectively drive the first upper punch 310 and the second upper punch 320 to move, and four second driving members to respectively drive the first lower punch 410, the second lower punch 420, the third lower punch 430, and the fourth lower punch 440 to move, the first upper step 110, the second upper step 120, the first lower step 130, the second lower step 140, the third lower step 150 and the fourth lower step 160 are respectively pressed out, so that the corresponding driving members can be adjusted according to the density requirements of each step to ensure the consistency of the density of each step, and the adjustment range is wide, the operation is simple, and the product precision and product quality are improved.

[0030] Reference Figures 1 to 5Specifically, the first upper punch 310 and the second upper punch 320 are coaxially arranged, the first upper punch 310 is located inside the second upper punch 320, the bottom surface of the first upper punch 310 is lower than the top surface of the second upper punch 320 and higher than the bottom surface of the second upper punch 320, and the inner wall of the first upper punch 310 abuts against the outer wall of the mandrel 220. Correspondingly, the first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 are coaxially arranged, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 are all arranged inside the first lower punch 410, and the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 abut against the outer wall of the mandrel 220. During pressing, the first upper punch 310 moves to press out the first upper step 110, the second upper punch 320 moves to press out the second upper step 120, the first lower punch 410 moves to press out the first lower step 130, the second lower punch 420 moves to press out the second lower step 140, the third lower punch 430 moves to press out the third lower step 150, and the fourth lower punch 440 moves to press out the fourth lower step 160. In this way, the pressing and forming of the magnetic core 100 is achieved, with a simple structure and easy operation.

[0031] Furthermore, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 all protrude from the top surface of the first lower punch 410, and the outer wall of the fourth lower punch 440 abuts against the inner wall of the second upper punch 320. By adopting the above structure, the second lower step 140, the third lower step 150 and the fourth lower step 160 of the pressed magnetic core 100 are located above the first lower step 130, thereby meeting the production requirements.

[0032] Reference Figures 1 to 5 It can be imagined that the top surface of the fourth lower punch 440 is provided with a first extension 441 and a second extension 442, and the first extension 441 and the second extension 442 are respectively extended along the inner wall and the outer wall of the fourth lower punch 440, and the first extension 441 abuts against the inner wall of the second upper punch 320. By providing the first extension 441 and the second extension 442, the edges of both sides of the fourth lower step 160 can be formed with a recessed portion 190; at the same time, the first extension 441 abuts against the inner wall of the second upper punch 320, so that a gap 180 is formed between the second upper step 120 and the fourth lower step 160 at the pressing position, which meets the production requirements. It is easy to understand that the bottom surface of the second upper punch 320 is provided with a protrusion 321, and the protrusion 321 is located at both ends of the second upper punch 320, and the protrusion 321 abuts against the first extension 441. Through the above structure, the second upper step 120 obtained by pressing is formed with a groove 170 , and the groove 170 is communicated with the gap 180 .

[0033] In some embodiments, the upper punch assembly further includes an upper template, which is lifted and arranged above the middle template 210, a first driving member is arranged on the upper template, and two first driving members are respectively connected to the first upper punch 310 and the second upper punch 320 in a one-to-one correspondence. Correspondingly, the lower punch assembly further includes a lower template, which is lifted and arranged below the middle template 210, and four second driving members are arranged on the lower template, and the second driving member and the first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 are lifted and arranged on the lower template. During operation, the upper template and the lower template move close to the middle template 210 respectively, so that the upper template and the lower template are respectively contacted and connected with the middle template 210, and then the first driving member drives the first upper punch 310 and the second upper punch 320 to move one by one, and the second driving member drives the first lower punch 410, the second lower punch 420, the third lower punch 430 and the fourth lower punch 440 to move one by one, thereby realizing the pressing of the magnetic core 100, with a simple structure and easy operation.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A magnetic core forming mold for producing a magnetic core, wherein the upper end of the magnetic core is provided with a first upper step and a second upper step, and the lower end of the magnetic core is provided with a first lower step, a second lower step, a third lower step and a fourth lower step, characterized in that: The magnetic core forming mold comprises: The middle mold assembly comprises a middle mold plate and a core rod, wherein the middle mold plate is provided with a mold cavity, and the core rod is inserted into the mold cavity; An upper punch assembly, comprising a first upper punch, a second upper punch and two first driving members, wherein the first upper punch and the second upper punch are lifted and lowered above the middle template, the two first driving members are respectively connected to the first upper punch and the second upper punch in a one-to-one correspondence, and the two first driving members respectively drive the first upper punch and the second upper punch to extend into the die cavity to press out the first upper step and the second upper step; The lower punch assembly comprises a first lower punch, a second lower punch, a third lower punch, a fourth lower punch and four second driving members, wherein the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are lifted and lowered below the middle die assembly, and the four second driving members are respectively connected to the first lower punch, the second lower punch, the third lower punch and the fourth lower punch in a one-to-one correspondence, and the four second driving members respectively drive the first lower punch, the second lower punch, the third lower punch and the fourth lower punch to extend into the die cavity to press out the first lower step, the second lower step, the third lower step and the fourth lower step.

2. The magnetic core forming mold according to claim 1, characterized in that: The first upper punch and the second upper punch are coaxially arranged, the first upper punch is located on the inner side of the second upper punch, the bottom surface of the first upper punch is lower than the top surface of the second upper punch and higher than the bottom surface of the second upper punch, and the inner wall of the first upper punch abuts against the outer wall of the core rod.

3. The magnetic core forming die according to claim 1, characterized in that: The first lower punch, the second lower punch, the third lower punch and the fourth lower punch are coaxially arranged, the second lower punch, the third lower punch and the fourth lower punch are all arranged on the inner side of the first lower punch, and the second lower punch, the third lower punch and the fourth lower punch are all in contact with the outer wall of the core rod.

4. The magnetic core forming die according to claim 3, characterized in that: The second lower punch, the third lower punch and the fourth lower punch all protrude from the top surface of the first lower punch, and the outer wall of the fourth lower punch abuts against the inner wall of the second upper punch.

5. The magnetic core forming die according to claim 4, characterized in that: The top surface of the fourth lower punch is provided with a first extension portion and a second extension portion, the first extension portion and the second extension portion are respectively extended along the inner wall and the outer wall of the fourth lower punch, and the first extension portion abuts against the inner wall of the second upper punch.

6. The magnetic core forming die according to claim 5, characterized in that: The bottom surface of the second upper punch is provided with bumps, the bumps are located at two ends of the second upper punch, and the bumps abut against the first extension portion.

7. The magnetic core forming die according to claim 1, characterized in that: The upper punch assembly also includes an upper template, which is lifted and lowered above the middle template. The first driving member is arranged on the upper template, and the first driving member is connected to the first upper punch and the second upper punch in a one-to-one correspondence.

8. The magnetic core forming die according to claim 1, characterized in that: The lower punch assembly also includes a lower template, which is lifted and lowered below the middle template, and the second driving member is arranged on the lower template. The second driving member and the first lower punch, the second lower punch, the third lower punch and the fourth lower punch are lifted and lowered on the lower template.

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