Coated amorphous magnetic core and manufacturing method

Abstract

A coated amorphous magnetic core includes an annular magnetic core wound with an amorphous strip, an inner cylinder arranged in the center hole of the annular magnetic core, the inner cylinder being adapted to the size of the center hole, an outer cylinder arranged on the outer circumferential surface of the annular magnetic core, the outer cylinder being adapted to the size of the outer circumferential surface of the annular magnetic core, the outer cylinder and the inner cylinder being inserted before the annular magnetic core is coated, and the coated amorphous magnetic core is obtained after the outer cylinder and the inner cylinder are coated together with the annular magnetic core. A method for manufacturing a coated amorphous magnetic core includes the following steps: an inner cylinder is arranged in the center hole of the annular magnetic core before coating, the inner cylinder being adapted to the size of the center hole, an outer cylinder is arranged on the outer circumferential surface of the annular magnetic core, the outer cylinder being adapted to the size of the outer circumferential surface of the annular magnetic core, and the outer cylinder and the inner cylinder are coated together with the annular magnetic core. The present invention has obvious benefits.

Description

Technical Field

[0001] The invention relates to an amorphous magnetic core, in particular to a coated amorphous magnetic core and a manufacturing method, and belongs to the technical field of electronic devices. Background Art

[0002] Amorphous magnetic cores are made by winding amorphous strips of a certain thickness into an annular magnetic core of a set diameter, and then packaging the magnetic core. There are currently two main forms of magnetic core packaging. One is box packaging, that is, the annular plastic box used in existing products is buckled together for packaging. This packaging requires a certain gap between the annular magnetic core and the plastic box, so the product volume after packaging is larger; the other is coating, which uses resin powder spraying or spraying diluted resin or coating encapsulation. The volume of the coated product is significantly reduced, and coupled with other factors such as easy processing, the current market demand is increasingly developing towards coated products. However, the winding size of coated products is extremely difficult to accurately control during the production process, especially after crystallization, the size consistency of the product will be worse. This size inconsistency will have a negative impact on the automated and efficient production of subsequent inspection, winding and other processes. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned problems existing in the current coated amorphous magnetic core and to provide a coated amorphous magnetic core and a manufacturing method.

[0004] In order to achieve the purpose of the present invention, the following technical scheme is adopted: a coated amorphous magnetic core, including an annular magnetic inner core formed by winding an amorphous strip, an inner cylinder is arranged in the center hole of the annular magnetic inner core, and the size of the inner cylinder is adapted to the center hole, an outer cylinder is arranged on the outer circumferential surface of the annular magnetic inner core, and the size of the outer cylinder is adapted to the outer circumferential surface of the annular magnetic core, the outer cylinder and the inner cylinder are inserted before the annular magnetic inner core is coated, and the outer cylinder and the inner cylinder are coated together with the annular magnetic inner core to obtain a coated amorphous magnetic core.

[0005] Furthermore, one end of the inner cylinder and the outer cylinder are integrally connected to a closed end surface to form an annular concave shell with an open other end. The annular magnetic inner core is located in the annular concave shell. The annular concave shell and the annular magnetic inner core are coated together to obtain a coated amorphous magnetic core.

[0006] Furthermore, the wall thickness of the inner tube and the outer tube is less than 0.3 mm.

[0007] Furthermore, the wall thickness of the inner cylinder and the outer cylinder is less than 0.25 mm.

[0008] Furthermore, the wall thickness of the inner cylinder and the outer cylinder is less than 0.15mm.

[0009] Furthermore, the upper end surface of the annular concave shell having an opening is covered with an annular cover, and the annular cover and the annular magnetic inner core are coated together to obtain a coated amorphous magnetic core.

[0010] A method for manufacturing a coated amorphous magnetic core comprises the following steps: arranging an inner cylinder in the center hole of an annular magnetic inner core before coating, the inner cylinder being adapted to the size of the center hole; arranging an outer cylinder on the outer circumferential surface of the annular magnetic inner core, the outer cylinder being adapted to the size of the outer circumferential surface of the annular magnetic core; and coating the outer cylinder, the inner cylinder and the annular magnetic inner core together.

[0011] Furthermore, one end of the inner cylinder and the outer cylinder are integrally connected to a closed end surface to form an annular concave shell with an open end at the other end. After the annular magnetic inner core is installed in the annular concave shell, the inner cylinder is located in the center hole, and the outer peripheral surface of the annular magnetic inner core is located in the outer cylinder. After the annular concave shell and the annular magnetic inner core are coated together, a coated amorphous magnetic core is obtained.

[0012] Further, after the annular core is installed in the annular concave shell, an annular cover is provided on the opening at the other end of the annular concave shell, and then painted.

[0013] Furthermore, the wall thickness of the inner cylinder and the outer cylinder are both less than 0.25 mm.

[0014] The positive and beneficial technical effects of the present invention are: the present invention adopts an outer cylinder and an inner cylinder to achieve consistency in the size of the magnetic inner core before spraying, effectively solving the negative impact of inconsistent sizes of the coated magnetic core on subsequent processes. Moreover, unlike the traditional box sealing form, the volume of the encapsulated product will not be very large, which can fully meet the requirements of the coated magnetic core. In addition, while focusing on solving its size inconsistency, it also produces the following unexpected technical effects: First, after adopting this method, the strength of the coated magnetic core is significantly increased, and the wire diameter that can be matched subsequently can be improved compared with the current coated magnetic core, the economic value is improved, and the increase in strength improves its quality stability in subsequent processing and finished product use; second, by adopting this solution, it is found that the performance parameters of the amorphous magnetic core can be tested before coating. The current coated amorphous magnetic core has a greater impact on its performance due to the coating process, so the performance parameters of the amorphous magnetic core must be tested after coating to distinguish between qualified products and waste products. However, once the coating is completed, if the amorphous magnetic core is found to be unqualified after testing, it can only be treated as waste and has basically no reuse value. However, after adopting this solution, it was found that after installing There is basically no difference between the performance parameters obtained after the inner and outer tube tests and the performance parameters obtained after coating, and the coating process has basically no effect on the performance parameters of the magnetic core. This allows the test of whether the amorphous magnetic core is qualified to be carried out on the semi-finished product before coating. At this time, if the semi-finished product is found to be unqualified, it can be made into a qualified product through targeted repair technology. Therefore, this effectively improves the yield rate in the production process of amorphous magnetic cores, and the economic benefits are obvious; thirdly, because burrs and warping will occur on some semi-finished products during the processing of the magnetic inner core, customers will not accept magnetic inner cores with burrs or warping, and they are defective products. After adopting the technical solution of the present application, even if the magnetic inner core has burrs and warping, they are all in an invisible range, which improves the yield rate. Burrs and warping are a long-standing problem that has not been solved in the production of coated amorphous magnetic cores. The technical solution of the present application solves the defective products caused by burrs, warping and other problems that occur in the production of magnetic inner cores. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a top view of the solution of the present application without a top cover.

[0016] Figure 2 yes Figure 1 The corresponding diagram is only the main view of the middle section of the inner tube and the outer tube.

[0017] Figure 3 yes Figure 1 The corresponding schematic diagram of the middle section main view of the annular concave shell.

[0018] Figure 4 It is a top view schematic diagram of the solution of the present application with an annular cover.

[0019] Figure 5yes Figure 4 The corresponding schematic diagram of the middle section main view using an annular concave shell and annular cover. DETAILED DESCRIPTION

[0020] In order to more fully explain the implementation of the present invention, implementation examples of the present invention are provided. These implementation examples are merely elaborations of the present invention and do not limit the scope of the present invention.

[0021] The present invention is further described in detail with reference to the accompanying drawings, in which the following are marked: 1: inner cylinder; 2: outer cylinder; 3: annular magnetic inner core; 4: closed end surface; 5: annular cover.

[0022] As shown in the accompanying drawings, a coated amorphous magnetic core includes an annular magnetic inner core 3 wound from a sampled amorphous strip, an inner cylinder 1 is provided in the center hole of the annular magnetic inner core, and the inner cylinder is adapted to the size of the center hole, and an outer cylinder 1 is provided on the outer circumferential surface of the annular magnetic inner core, and the outer cylinder is adapted to the size of the outer circumferential surface of the annular magnetic core. The outer cylinder and the inner cylinder are inserted before the annular magnetic inner core is coated, and the coated amorphous magnetic core is obtained after the outer cylinder and the inner cylinder are coated together with the annular magnetic inner core. The inner cylinder is adapted to the size of the center hole, which ensures that the inner cylinder can be inserted into the center hole and will not fall off or shift during the movement of the annular magnetic inner core. The outer cylinder is adapted to the size of the outer circumferential surface of the annular magnetic core, which ensures that the magnetic inner core can be placed in the inner and outer cylinders and will not fall off or shift during the movement of the annular magnetic inner core. Figure 2 It is a schematic diagram of the middle cross-section when only the inner tube 1, the outer tube 2 and the magnetic inner core are combined. Figure 1 It is the corresponding top view schematic diagram.

[0023] The inner and outer cylinders 1 and 2 are integrally connected at one end to a closed end surface 4, forming an annular concave shell with an open end at the other end. In the figure, the inner and outer cylinders 1, 2, and closed end surface 4 are integrated to form the annular concave shell. The annular concave shell can be formed by die pressing. The material of the annular concave shell can be polymer or metal materials such as stainless steel, aluminum, and copper. The annular concave shell is located within the annular concave shell. The annular concave shell and the annular magnetic inner core are coated together to form a coated amorphous magnetic core. The wall thickness of the inner and outer cylinders is less than 0.3 mm. More specifically, the wall thickness of the inner and outer cylinders is less than 0.25 mm.

[0024] More optimally, the wall thickness of the inner tube and the outer tube is less than 0.15 mm.

[0025] As a further optimization of the technical solution, an annular cover 5 is provided on the end surface of the annular concave shell with an opening, and the annular cover and the annular magnetic inner core are coated together to obtain a coated amorphous magnetic core. Figure 4 、 Figure 5 The scheme using an annular cover is shown schematically.

[0026] A method for manufacturing a coated amorphous magnetic core comprises the following steps: arranging an inner cylinder 1 in the center hole of an annular magnetic inner core 3 before coating, the inner cylinder being adapted to the size of the center hole; arranging an outer cylinder 2 on the outer circumferential surface of the annular magnetic inner core, the outer cylinder being adapted to the size of the outer circumferential surface of the annular magnetic core; and coating the outer cylinder and the inner cylinder together with the annular magnetic inner core.

[0027] Optimized, one end of the inner cylinder and the outer cylinder are integrally connected to a closed end face 4 to form an annular concave shell with an open end at the other end. After the annular magnetic inner core is installed in the annular concave shell, the inner cylinder is located in the center hole, and the outer peripheral surface of the annular magnetic inner core 3 is located in the outer cylinder. After the annular concave shell and the annular magnetic inner core are coated together, a coated amorphous magnetic core is obtained.

[0028] More optimally, after the annular magnetic core is installed in the annular concave shell, an annular cover is placed over the opening at the other end of the annular concave shell, and then the coating is performed. The wall thickness of the inner and outer cylinders is less than 0.3 mm. More specifically, the wall thickness of the inner and outer cylinders is less than 0.25 mm. Even more optimally, the wall thickness of the inner and outer cylinders is less than 0.15 mm, and can be 0.1 mm.

[0029] The coating process of the coated magnetic core of the present application can be implemented by any currently available coating process, such as the current resin powder spray encapsulation, spray diluted resin encapsulation, or coating encapsulation.

[0030] It should be noted that the annular inner magnetic core in this application is not limited to a circular ring. It also includes various annular shapes, such as rectangular, elliptical, and racetrack. Accordingly, the inner cylinder conforms to the contour of the annular center hole, and the outer cylinder conforms to the shape of the annular outer circumference. The various annular shapes are readily understood, and existing magnetic cores also have different annular shapes, so we will not elaborate on them here.

[0031] After describing the embodiments of the present invention in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. A method for manufacturing a high-strength coated amorphous magnetic core, which uses an annular magnetic core wound with an amorphous strip, characterized in that The invention comprises the following steps: arranging an inner cylinder in the center hole of the annular magnetic inner core before coating, the inner cylinder being adapted to the size of the center hole, arranging an outer cylinder on the outer circumferential surface of the annular magnetic inner core, the outer cylinder being adapted to the size of the outer circumferential surface of the annular magnetic core, one end of the inner cylinder and the outer cylinder being integrally connected to a closed end surface to form an annular concave shell with the other end open, the wall thickness of the inner cylinder and the outer cylinder being 0.1 mm, and after the annular magnetic inner core is mounted in the annular concave shell, the inner cylinder is located in the center hole, and the outer circumferential surface of the annular magnetic inner core is located in the outer cylinder, and after the annular magnetic core is mounted in the annular concave shell, an annular cover is provided on the opening of the other end of the annular concave shell, and then coating is carried out, and the outer cylinder and the inner cylinder are coated together with the annular magnetic inner core to obtain a high-strength coated amorphous magnetic core, and the performance parameters of the amorphous magnetic core are tested before coating, and the test and judgment on whether the amorphous magnetic core is qualified are carried out on the semi-finished product before coating.

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