Electrode sheet for copper-iron co-fired inductor
The positioning frame structure solves the problem of positioning difficulties in the forming process of copper-iron co-fired inductor electrode sheets, achieving efficient feeding and unloading, and improving the production efficiency and product quality of copper-iron co-fired inductors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENGDIAN GRP DMEGC MAGNETICS CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-10
AI Technical Summary
When traditional copper-iron co-fired inductors are being formed and fed, the small and irregular size of the copper sheets makes positioning difficult, affecting the pressing efficiency of the forming press. Furthermore, the inductors are prone to displacement and deflection under the extrusion of powder.
The positioning frame structure includes a main body and multiple branches. The electrode sheet main body and the branches are connected by a pre-cut groove. The positioning frame fixes multiple electrode sheet main bodies, which facilitates forming and feeding. The pre-cut groove separates the electrode sheet main bodies, improving feeding and unloading efficiency.
It significantly improves the efficiency of magnetic core feeding and pressing, ensures the quality of magnetic core pressing, reduces equipment and production costs, and enhances the user experience.
Smart Images
Figure CN224480861U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inductor technology, and in particular to an electrode sheet for a copper-iron co-fired inductor. Background Technology
[0002] The integrated copper-iron co-fired inductor consists of a magnetic core and electrode sheets. The magnetic core is formed by embedding the electrode sheets inside metallic magnetic powder and pressing them together. The SMD leads are connected to the electrode sheets and led out from the magnetic core, directly formed on the surface of the magnetic core. Using high-pressure molding of the copper sheets and low-loss magnetic powder in one piece, the copper sheets and magnetic core can be tightly connected without air gaps. Compared with traditional ferrite composite inductors, it has characteristics such as high efficiency, small size, and high power applications. It is widely used in high-computing applications such as artificial intelligence, autonomous driving, servers, communication power supplies, and AI laptops. Its main function is to power the front end of chips such as GPUs (Central Processing Units), CPUs (Graphics Processing Units), and ASICs (Application-Specific Integrated Circuits). Traditional integrated copper-iron co-fired inductors are small in size, with even smaller copper sheets and irregular shapes, making them difficult to handle manually or automatically during molding and feeding. When filling copper sheets into the forming press, they must be loaded one by one in multiple batches, which increases the feeding time of the forming press and seriously affects the pressing efficiency of the forming press. In addition, small copper sheets are difficult to position after being placed into the middle mold cavity. During the pressing process, they are prone to displacement, deflection and other defects under the extrusion of powder. Utility Model Content
[0003] The purpose of this invention is to provide an electrode sheet for a copper-iron co-fired inductor, which has a simple structure, is easy to position, greatly improves the feeding efficiency of the magnetic core, and ensures the pressing quality of the magnetic core.
[0004] To achieve this objective, the present invention adopts the following technical solution: an electrode sheet for a copper-iron co-fired inductor, comprising a positioning frame and multiple electrode sheet bodies, the positioning frame comprising a main body and multiple branch parts, the branch parts being integrally formed with the main body, the main body being arranged along a first direction, and each branch part being arranged along a second direction, the first direction being perpendicular to the second direction; the electrode sheet bodies and the branch parts are arranged in a one-to-one correspondence, the electrode sheet bodies are U-shaped, and both ends of the U-shaped electrode sheet bodies are connected to the ends of the corresponding branch parts away from the main body, the branch parts having pre-cut grooves at the connection points with the electrode sheet bodies.
[0005] Preferably, the electrode sheet body has an exposed portion at one end near the branch, the exposed portion protruding from the surface of the finished magnetic core, and the pre-break groove is formed between the exposed portion and the branch.
[0006] Preferably, the pre-cut grooves are symmetrically arranged on both sides of the branch along the thickness direction of the positioning frame.
[0007] Preferably, the sidewall of the pre-cut groove near the main body is set as an inclined surface, and the end of the inclined surface away from the center of the branch is inclined toward the main body along the depth direction of the pre-cut groove.
[0008] Preferably, along the depth direction of the pre-break groove, the minimum thickness of the branch between the two pre-break grooves is d, which satisfies: 0.1mm≤d≤0.35mm.
[0009] Preferably, the branch portion is provided with a hollowed-out groove, which extends through the branch portion along the thickness direction of the positioning frame.
[0010] Preferably, along the first direction, the length of the electrode sheet body is a, at least two branches are arranged at intervals along the first direction, and the distance between two adjacent branches is L, satisfying: 1.2×a≤L≤1.5×a.
[0011] Preferably, along the second direction, the width of the electrode sheet body is b, and at least two branches are symmetrically arranged on both sides of the body along the second direction. The distance between the two electrode sheet bodies connected by the two branches is H, satisfying: 4×b≤H≤6×b.
[0012] Preferably, the multiple branches are symmetrically arranged on both sides of the main body and together with the main body form a fishbone-shaped structure.
[0013] Preferably, along the second direction, the width of the main body is h, satisfying: 1.5mm≤h≤3.5mm.
[0014] The beneficial effects of this invention are as follows: By setting a positioning frame, which is fixedly connected to multiple electrode sheet bodies through branches, the user can position the positioning frame along with the electrode sheet bodies in the mold when pressing the magnetic core, facilitating forming and feeding. This also avoids the problem of individual electrode sheet bodies shifting or moving under pressure, eliminating the need for secondary pressing of the electrode sheet bodies and related equipment, significantly improving the feeding and pressing efficiency of the magnetic core, ensuring the quality of the pressed magnetic core, and reducing equipment layout and production costs. Furthermore, by setting a pre-breaking groove, after the magnetic core is formed, the user can break off the branches through the pre-breaking groove to separate the electrode sheet bodies, improving unloading efficiency and user experience. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the electrode sheet structure of the copper-iron co-fired inductor according to an embodiment of this utility model;
[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0017] Figure 3 This is a schematic diagram of the pre-break groove according to an embodiment of the present invention.
[0018] In the figure: 100, positioning frame; 110, main body; 120, branch; 121, pre-broken groove; 122, hollow groove; 200, electrode sheet body; 210, exposed part; 300, magnetic core. Detailed Implementation
[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.
[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0023] Reference Figures 1 to 3As shown in the embodiment of this application, an electrode sheet for a copper-iron co-fired inductor includes a positioning frame 100 and multiple electrode sheet bodies 200. The positioning frame 100 includes a rectangular main body 110 and multiple rectangular branch portions 120. The branch portions 120 and the main body 110 are integrally formed. The main body 110 is arranged along a first direction, and each branch portion 120 is arranged along a second direction. The first direction and the second direction are perpendicular. In this embodiment, the first direction is the length direction of the positioning frame 100, and the second direction is the width direction of the positioning frame 100. This is specifically stated to avoid misunderstanding.
[0024] Multiple electrode sheet bodies 200 are provided, and each electrode sheet body 200 is correspondingly arranged with a branch portion 120. The electrode sheet body 200 is U-shaped, and both ends of the U-shaped electrode sheet body 200 are connected to the end of the corresponding branch portion 120 away from the main body portion 110. The branch portion 120 is provided with a pre-breaking groove 121 at the connection with the electrode sheet body 200. The pre-breaking groove 121 is opened on at least one side of the branch portion 120 in the wall thickness direction.
[0025] The design and manufacturing steps of the electrode sheet for the copper-iron co-fired inductor in this embodiment are as follows:
[0026] The first step is to design the shape and size of the electrode sheet body 200 embedded in the powder according to the size and electrical specifications of the finished magnetic core 300.
[0027] The second step is to design the positioning frame 100 outside the magnetic core 300 based on the pressure exerted on the magnetic core 300 and the copper sheet during the forming process, taking into account the strength of the mold.
[0028] The third step is to determine the shape and size of the positioning frame 100 based on the shape and size of the electrode body 200, and then combine the electrode body 200 and the positioning frame 100 to obtain the electrode model.
[0029] The fourth step is to process the electrode sheet into a continuous sheet structure in one go according to the electrode sheet model.
[0030] In this embodiment, the electrode sheet used for the copper-iron co-fired inductor can be formed in one step by techniques such as stamping and injection molding, which will not be described in detail here.
[0031] Understandably, by setting up the positioning frame 100, which is fixedly connected to multiple electrode sheet bodies 200 via the branch 120, the user can position the positioning frame 100 along with the electrode sheet bodies 200 in the mold when pressing the magnetic core 300. This facilitates molding and feeding, and avoids the problem of individual electrode sheet bodies 200 shifting or moving when compressed. Compared to the traditional secondary processing technology, which involves first filling and pressing powder to position the electrode sheet, and then filling powder again to fix the electrode sheet, the positioning frame 100, after being positioned in the mold, can directly fill and press multiple electrode sheets into the magnetic core 300 at once. This eliminates the need for a secondary powder filling and pressing step for the electrode sheet bodies 200, as well as the associated equipment, significantly improving the feeding and pressing efficiency of the magnetic core 300, ensuring the pressing quality of the magnetic core 300, and reducing equipment layout and production costs. By setting up the pre-breaking groove 121, after the magnetic core 300 is formed, the user can break off the branch 120 through the pre-breaking groove 121 to separate the electrode sheet bodies 200, improving material unloading efficiency and user experience.
[0032] Furthermore, the branch portion 120 is provided with a hollowed-out groove 122, which extends through the branch portion 120 along the thickness direction of the positioning frame 100. In some embodiments, the hollowed-out groove 122 is arranged in a grid pattern, and in other embodiments, the hollowed-out groove 122 is a strip-shaped groove and is connected to the hollow portion of the U-shaped electrode sheet body 200.
[0033] By setting the hollow groove 122, the mass of the branch 120 can be reduced, the amount of material used in the branch 120 can be reduced, and the production and use cost of the positioning frame 100 can be reduced.
[0034] Furthermore, multiple branches 120 are symmetrically arranged on both sides of the main body 110 and form a fishbone-shaped structure with the main body 110. Specifically, the multiple branches 120 are divided into multiple groups of two, and each group of branches 120 is symmetrically arranged on both sides of the main body 110 along the second direction. The multiple groups of branches 120 are arranged at intervals along the first direction, so that the overall shape of the positioning frame 100 is approximately a fishbone-shaped continuous structure.
[0035] By symmetrically arranging multiple branches 120 on both sides of the main body 110, the positioning frame 100 can be guaranteed to have a balanced mass and a stable center. This also expands the number of electrode sheet bodies 200 that the positioning frame 100 can connect to and ensures that the multiple electrode sheet bodies 200 are evenly distributed. This facilitates the positioning of the positioning frame 100 and the pressing of the mold, effectively improving the structural rationality of the positioning frame 100.
[0036] It should be noted that in some other embodiments, multiple branches 120 can also be arranged alternately on both sides of the main body 110. In this case, the overall shape of the positioning frame 100 is also a fishbone-shaped continuous structure, which can also achieve the effects of stable and convenient positioning, and will not be described in detail here.
[0037] Reference Figure 1 As shown, it can be understood that, along the first direction, the length of the electrode sheet body 200 is a, and there are at least two branches 120 arranged at intervals along the first direction. The distance between two adjacent branches 120 in the first direction is L, which satisfies: 1.2×a≤L≤1.5×a.
[0038] The distance between two branches 120 spaced apart in the first direction is limited to more than 1.2 times the length of the electrode sheet body 200 to avoid stress concentration and mold damage during powder filling and pressing when the distance between two adjacent electrode sheet bodies 200 is too small. Conversely, the distance between two branches 120 spaced apart in the first direction is limited to less than 1.5 times the length of the electrode sheet body 200 to avoid material waste and increased mold volume due to excessive distance between two adjacent electrode sheet bodies 200. By reasonably limiting the spacing between two adjacent branches 120 in the first direction, the magnetic core 300 is successfully formed, materials are saved, and the mold volume is reduced.
[0039] It is understood that, along the second direction, the width of the electrode sheet body 200 is b, and there are at least two branches 120 symmetrically arranged on both sides of the body 110 along the second direction. The distance between the two electrode sheet bodies 200 connected to the two symmetrical branches 120 in the second direction is H, which satisfies: 4×b≤H≤6×b.
[0040] The distance between two spaced-apart branches 120 in the second direction is limited to more than four times the width of the electrode sheet body 200 to avoid problems such as the positioning frame 100 being too narrow and affecting positioning if the distance between two adjacent electrode sheet bodies 200 is too small. Conversely, the distance between two spaced-apart branches 120 in the second direction is limited to less than six times the width of the electrode sheet body 200 to avoid problems such as material waste and increased mold volume if the distance between two adjacent electrode sheet bodies 200 is too large. By reasonably limiting the total length of the two symmetrical branches 120 in the second direction, the positioning frame 100 can be positioned quickly while reducing the mold volume.
[0041] It is understandable that, along the second direction, the width of the main body 110 is h, which satisfies: 1.5mm≤h≤3.5mm.
[0042] The width of the main body 110 is limited to more than 1.5 mm to ensure that the main body 110 has sufficient strength to support the entire positioning frame and multiple electrode sheet bodies 200; the width of the main body 110 is limited to less than 3.5 mm to avoid problems such as material waste and increased mold volume caused by an excessively wide main body 110. By reasonably limiting the width of the main body 110, the structural stability of the positioning frame 100 is improved.
[0043] Reference Figure 2 As shown, it can be understood that the electrode sheet body 200 has an exposed portion 210 at one end near the branch portion 120. After the magnetic core 300 is filled with powder and pressed into shape, the exposed portion 210 can protrude from the surface of the finished magnetic core 300. The pre-break groove 121 is opened between the exposed portion 210 and the branch portion 120.
[0044] By setting the exposed part 210, after the user breaks off the branch 120 through the pre-break groove 121 to remove the finished magnetic core 300, the burrs, cracks and other structures at the break position of the pre-break groove 121 will remain on the fracture surface of the exposed part 210, instead of being recessed into the surface of the finished magnetic core 300. After the user grinds off the exposed part 210, a flat surface of the electrode sheet body 200 can be obtained, ensuring the quality of the finished magnetic core 300 and the consistency of multiple finished magnetic cores 300.
[0045] Furthermore, along the second direction, the protrusion distance of the exposed portion 210 is c, which satisfies: 0.05mm≤c≤0.25mm.
[0046] By limiting the protrusion distance of the exposed portion 210 to above 0.05mm, a certain distance is maintained between the branch portion 120 and the end face of the magnetic core 300, ensuring that the broken branch portion 120 will not swing and scratch the surface of the magnetic core 300 when the user breaks it off. Limiting the protrusion distance of the exposed portion 210 to below 0.25mm avoids problems such as unstable connection of the electrode sheet body 200 or difficulties in subsequent polishing due to excessive length of the exposed portion 210. By reasonably limiting the protrusion distance of the exposed portion 210, subsequent processing is facilitated and the quality of the finished magnetic core 300 is guaranteed.
[0047] Reference Figure 3 As shown, it can be understood that the pre-cut grooves 121 are symmetrically arranged on both sides of the branch 120 along the thickness direction of the positioning frame 100.
[0048] By setting up symmetrical pre-break grooves 121, the user (or the breaking machine) can swing the branch 120 back and forth to quickly break the branch 120, thereby improving the efficiency of the pre-break grooves 121.
[0049] Furthermore, the side wall of the pre-cut groove 121 near the main body 110 is set as an inclined surface, and the end of the inclined surface away from the center of the branch 120 is inclined toward the main body 110 along the depth direction of the pre-cut groove 121.
[0050] The side of the pre-cut groove 121 closest to the main body 110 is made into an inclined surface. On the one hand, it can facilitate the entry of the stamping die and improve the forming efficiency of the electrode sheet; on the other hand, it can ensure that the exposed part 210 is flat, thereby ensuring the consistency of the height of the finished magnetic core 300.
[0051] Furthermore, along the depth direction of the pre-break groove 121, the minimum thickness of the branch portion 120 between the two pre-break grooves 121 is d, which satisfies: 0.1mm≤d≤0.35mm.
[0052] The minimum thickness at the connection between the exposed portion 210 and the branch portion 120 is limited to 0.1mm or more to ensure the connection strength between the exposed portion 210 and the branch portion 120, preventing the electrode sheet body 200 from deforming and falling off during transportation and handling, thus improving the structural stability of the electrode sheet used in copper-iron co-fired inductors. The minimum thickness at the connection between the exposed portion 210 and the branch portion 120 is limited to 0.35mm or less to avoid problems such as difficulty in bending by the user (or bending machine) and difficulty in detaching the finished magnetic core 300 when the bottom wall thickness of the pre-broken groove 121 is too thick. By reasonably limiting the minimum thickness of the branch portion 120 between the two pre-broken grooves 121, the connection of the electrode sheet body 200 is stable and the separation is quick.
[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An electrode sheet for a copper-iron co-fired inductor, characterized in that, include: The positioning frame (100) includes a main body (110) and a plurality of branches (120), wherein the branches (120) and the main body (110) are integrally formed, the main body (110) is arranged along a first direction, and each branch (120) is arranged along a second direction, wherein the first direction is perpendicular to the second direction; Multiple electrode sheet bodies (200) are provided, and each electrode sheet body (200) is correspondingly arranged with a branch (120). Each electrode sheet body (200) is U-shaped, and both ends of the U-shaped electrode sheet body (200) are connected to the end of the corresponding branch (120) away from the main body (110). The branch (120) is provided with a pre-cut groove (121) at the connection with the electrode sheet body (200).
2. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, The electrode sheet body (200) has an exposed portion (210) at one end near the branch portion (120). The exposed portion (210) can protrude from the surface of the finished magnetic core (300). The pre-break groove (121) is opened between the exposed portion (210) and the branch portion (120).
3. The electrode sheet for a copper-iron co-fired inductor according to claim 2, characterized in that, Along the thickness direction of the positioning frame (100), the pre-cut groove (121) is symmetrically arranged on both sides of the branch (120).
4. The electrode sheet for a copper-iron co-fired inductor according to claim 3, characterized in that, The side wall of the pre-break groove (121) near the main body (110) is set as an inclined surface, and the end of the inclined surface away from the center of the branch (120) is inclined toward the main body (110) along the depth direction of the pre-break groove (121).
5. The electrode sheet for a copper-iron co-fired inductor according to claim 4, characterized in that, Along the depth direction of the pre-break groove (121), the minimum thickness of the branch (120) between the two sides of the pre-break groove (121) is d, which satisfies: 0.1mm≤d≤0.35mm.
6. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, The branch (120) is provided with a hollowed-out groove (122), which extends through the branch (120) along the thickness direction of the positioning frame (100).
7. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, Along the first direction, the length of the electrode sheet body (200) is a, and at least two branches (120) are arranged at intervals along the first direction, with a distance of L between two adjacent branches (120), satisfying: 1.2×a≤L≤1.5×a.
8. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, Along the second direction, the width of the electrode sheet body (200) is b, and at least two branches (120) are symmetrically arranged on both sides of the body (110) along the second direction. The distance between the two electrode sheet bodies (200) connected by the two branches (120) is H, which satisfies: 4×b≤H≤6×b.
9. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, Multiple branches (120) are symmetrically arranged on both sides of the main body (110) and together with the main body (110) form a fishbone-shaped structure.
10. The electrode sheet for a copper-iron co-fired inductor according to claim 1, characterized in that, Along the second direction, the width of the main body (110) is h, which satisfies: 1.5mm≤h≤3.5mm.