Injection mold for filter embedded with soft magnetic core
By embedding a magnetic core holder and guide post in the filter injection mold, the soft magnetic core can be directly embedded and molded, which solves the problems of additional process steps and cracking risk in the existing technology, and improves production efficiency and product stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-31
AI Technical Summary
In the current filter manufacturing process, the assembly of soft magnetic cores requires additional process steps, which increases manufacturing costs and poses a risk of cracking, especially when used in the transmissions of new energy vehicles, threatening safety.
Design an injection mold for embedding soft magnetic cores. By setting a core holder and guide post in the mold, the soft magnetic cores can be directly embedded and formed during the injection molding process, avoiding subsequent assembly steps.
It improves processing efficiency, ensures product stability, avoids the risk of cracking, and reduces manufacturing costs.
Smart Images
Figure CN224060339U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filter manufacturing technology, and in particular to an injection mold for filters with embedded soft magnetic cores. Background Technology
[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. A filter can effectively filter out specific frequencies or frequencies outside of a power supply line to obtain a power signal of a specific frequency, or eliminate a power signal of a specific frequency.
[0003] In the production process of filters with soft magnetic cores, the first step is to injection mold the filter components using a filter injection mold. Then, the soft magnetic core is placed inside the injection molded component and assembled as a whole using adhesive or snap-fit methods. This process not only requires additional manufacturing steps, increasing the filter's production cost, but also introduces a risk of cracking into the entire product. This is particularly problematic for products used in the transmissions of new energy vehicles; cracking could cause significant damage to the transmission or drive mechanism, even threatening the safe operation of the entire vehicle.
[0004] In view of the above problems, we designed an injection mold to embed the soft magnetic core into the injection molded component for direct processing. Utility Model Content
[0005] To address the aforementioned technical problems, this utility model provides an injection mold for a filter with an embedded soft magnetic core, enabling the core to be embedded during the overall molding process of the filter mold. After demolding, the product is directly formed without the need for further processing.
[0006] To achieve the above objectives, the technical solution of this utility model is as follows:
[0007] A filter injection mold with an embedded soft magnetic core is characterized by comprising a base, a lower mold, an upper mold, a moving cylinder, and a demolding assembly. The moving cylinder is mounted on the base, and its telescopic end is connected to the lower mold. The upper mold is located above the lower mold. The lower mold has a first injection cavity and a second injection cavity, the first injection cavity being located within the second injection cavity and its height being lower than that of the second injection cavity. A magnetic core holder is provided within the second injection cavity. The demolding assembly is provided in the lower mold. The upper mold has an injection hole connected to an injection tube.
[0008] The demolding assembly includes a demolding cylinder and a lifting plate. The demolding cylinder is installed below the lower mold. The telescopic end of the demolding cylinder extends into the lower mold and is connected to the lifting plate. The lifting plate is located in a movable groove at the bottom of the second injection cavity.
[0009] The upper and lower molds are provided with guide posts at the four corners. The guide posts pass through the guide holes provided on the upper and lower molds and the bottom of the guide posts are fixed on the base. The guide posts guide the movement of the lower mold.
[0010] Furthermore, the magnetic core holder is compatible with the soft magnetic core.
[0011] Furthermore, the base is provided with a buffer pad, which is located below the demolding cylinder. When the mold moves down under the control of the moving cylinder, the buffer pad is used to prevent the bottom of the demolding cylinder from hitting the base.
[0012] The beneficial effects of this utility model are:
[0013] This invention provides a core holder for installing a soft magnetic core in the second injection cavity of the lower mold of an injection mold. During injection molding, the lower mold is first moved downward by a moving cylinder to separate from the upper mold. The operator then installs the soft magnetic core into the core holder in the injection cavity. The lower mold is then moved upward by the moving cylinder to close with the upper mold, and injection is performed through the injection hole into the injection cavity between the upper and lower molds. This allows the soft magnetic core to be embedded during the overall molding process of the filter mold. The product is directly formed after demolding without the need for other processes, which not only improves processing efficiency but also makes the product more stable than assembled products. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of an injection mold for a filter with an embedded soft magnetic core according to the present invention.
[0015] Figure 2 This is a schematic diagram of the main structure of an injection mold for a filter with an embedded soft magnetic core according to the present invention.
[0016] Figure 3 This is a partial top view of the lower mold of an injection mold for a filter with an embedded soft magnetic core, according to the present invention.
[0017] Figure 4 This is a partially exploded structural diagram of the lower mold of an injection mold for a filter with an embedded soft magnetic core according to the present invention.
[0018] Figure 5This is a partial cross-sectional view of the lower mold of an injection mold for a filter with an embedded soft magnetic core, according to the present invention.
[0019] As shown in the figure: 1. Base, 2. Lower mold, 21. First injection cavity, 22. Second injection cavity, 3. Upper mold, 31. Injection hole, 32. Injection tube, 4. Moving cylinder, 51. Demolding cylinder, 52. Lifting plate, 6. Magnetic core holder, 7. Guide post, 8. Buffer pad, 9. Soft magnetic core. Detailed Implementation
[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0023] Example 1
[0024] As shown in the figure, a movable cylinder 4 is installed on the base 1. The telescopic end of the movable cylinder 4 is connected to the lower mold 2. An upper mold 3 is provided above the lower mold 2. An injection hole 31 is provided on the upper mold 3 and the injection hole 31 is connected to the injection tube 32. The upper mold 3 and the lower mold 2 are injected into the cavity formed by the upper mold 3 and the lower mold 2 through the injection hole 31.
[0025] like Figure 5The lower mold 2 is provided with a first injection cavity 21 and a second injection cavity 22. The first injection cavity 21 is located inside the second injection cavity 22, and the height of the first injection cavity 21 is lower than that of the second injection cavity 22. This allows the injection material to enter the first injection cavity 21 first, and after the first injection cavity 21 is full, it overflows into the second injection cavity 22. A magnetic core holder 6 is provided in the second injection cavity 22. The magnetic core holder 6 is provided with a slot for installing a soft magnetic core 9. The magnetic core holder 6 is compatible with the soft magnetic core 9, and the soft magnetic core can be installed on the magnetic core holder 6, thus completing the installation of the soft magnetic core 9 into the injection cavity of the injection mold.
[0026] like Figure 1 Guide pillars 7 are provided at the four corners of the upper mold 3 and the lower mold 2. The guide pillars 7 pass through the guide holes provided on the upper mold 3 and the lower mold 2 in sequence, and the bottom of the guide pillars 7 is fixed on the base 1. The guide pillars 7 guide the movement of the lower mold 2.
[0027] like Figure 2 and 5 The lower mold 2 is provided with a demolding assembly, which includes a demolding cylinder 51 and a lifting plate 52. The demolding cylinder 51 is installed on the lower mold 2. The telescopic end of the demolding cylinder 51 extends into the lower mold 2 and is connected to the lifting plate 52. The lifting plate 52 is located in the movable groove provided at the bottom of the second injection cavity 22.
[0028] Furthermore, a buffer pad 8 is provided on the base 1. The buffer pad 8 is located directly below the demolding cylinder 51. When the mold 2 moves down under the control of the moving cylinder 4, the buffer pad 8 is used to prevent the bottom of the demolding cylinder 51 from hitting the base 1.
[0029] Example 2
[0030] During injection molding, the moving cylinder 4 is first activated to control the lower mold 2 to move downwards, separating the lower mold 2 from the upper mold 3. At this time, the operator can install the soft magnetic core 9 into the core holder 6 in the second injection cavity 22, completing the installation of the soft magnetic core 9 into the injection cavity of the injection mold. Then, the moving cylinder 4 controls the lower mold 2 to move upwards and tightly close with the upper mold 3. After the lower mold 3 and the upper mold 2 are closed, injection molding is performed through the injection hole 31 on the upper mold 3 into the injection cavity between the upper mold 3 and the lower mold 2. This allows the soft magnetic core 9 to be embedded in the filter mold during the overall molding process. The product after demolding is directly formed without the need for other processes, which not only improves processing efficiency, but also makes the product more stable than the assembled product.
[0031] During demolding, the lower mold 2 and the upper mold 3 are separated by the moving cylinder 4, and the demolding cylinder 51 controls the lifting plate 52 to move upward, lifting the product in the injection cavity, making it easier to demold the product.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An injection mold for a filter with an embedded soft magnetic core, characterized in that The application relates to a magnetic core injection molding device, which comprises a base, a lower mold, an upper mold, a moving cylinder and a demolding assembly, the moving cylinder is installed on the base, the telescopic end of the moving cylinder is connected with the lower mold, the upper mold is arranged above the lower mold, the lower mold is provided with a first injection cavity and a second injection cavity, the first injection cavity is located in the second injection cavity and the height of the first injection cavity is lower than that of the second injection cavity, a magnetic core holder is arranged in the second injection cavity, the demolding assembly is arranged in the lower mold, the upper mold is provided with an injection hole, and the injection hole is connected with an injection pipe.
2. An injection mold for a filter with an embedded soft magnetic core according to claim 1, characterized in that The demolding assembly comprises a demolding cylinder and a jacking plate, the demolding cylinder is installed below the lower mold, the telescopic end of the demolding cylinder extends into the lower mold and is connected with the jacking plate, and the jacking plate is located in a moving groove arranged at the bottom of the second injection cavity.
3. The injection mold for a filter with an embedded soft magnetic core according to claim 1, characterized in that Guide columns are arranged at four corners of the upper mold and the lower mold, the guide columns penetrate through guide holes arranged on the upper mold and the lower mold, and the bottom of the guide column is fixed on the base.
4. The injection mold for a filter with an embedded soft magnetic core according to claim 1, characterized in that The magnetic core holder is matched with a soft magnetic core.