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A method for reprocessing magnetic core powder after compression molding

A press molding and reprocessing technology, applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve the problems of low bonding strength between glue and powder particles, low cutting yield rate, etc., to improve fluidity and permeability, improve adhesive strength, increase the effect of product strength

Active Publication Date: 2022-06-10
湖南迈特电子技术有限公司
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Problems solved by technology

The current production method is to directly cut the magnetic core by pressing and forming. Although the magnetic core powder contains glue, the bonding strength between the glue and the powder particles is not high after pressing, resulting in a low cutting yield. The cutting yield is 90%~ 95%, the defect is mainly missing corners

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  • A method for reprocessing magnetic core powder after compression molding

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Embodiment Construction

[0017] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0018] see figure 1 , a magnetic core powder reprocessing method after pressing and molding, the pressed magnetic core is subjected to high temperature and high humidity treatment. The magnetic core is dried, and then the magnetic core is cut according to the set process, and the set process is a conventional cutting process.

[0019] The specific processes of heating and humidification treatment and drying treatment include:

[0020] Heating the magnetic core to the first temperature at the first heating rate and keeping it for the first time is to preheat the magnetic core to avoid cracking due to the excessive temperature difference between the inside and outside of the magnetic core, and at the same time, the glue can be softened again;

[0021] Humidify the magnetic core at the set humidity, and heat the magnetic core to the second temp...

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Abstract

The invention discloses a reprocessing method of magnetic core powder after compression molding, which relates to the production of magnetic cores, and mainly solves the technical problem of low yield rate in the existing magnetic core manufacturing methods. The method is to first process the magnetic core Heating and humidifying treatment is carried out, and the magnetic core is dried, and then cut according to the set process. In the present invention, heat treatment is performed on the magnetic core first, so that the glue in the magnetic core is re-melted and distributed, so that the rate of good cutting products can be more than 99%.

Description

technical field [0001] The invention relates to the production of magnetic cores, and more particularly, to a method for post-processing of magnetic core powder after pressing and molding. Background technique [0002] Core press forming and core cutting are the two basic steps in core production. The current production method is to directly cut the magnetic core by pressing and molding. Although the magnetic core powder contains glue, the bonding strength between the glue and the powder particles after pressing is not high, resulting in a low cutting yield rate, which is 90%~ 95%, the defects are mainly missing corners. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is aimed at the above-mentioned deficiencies of the prior art, and the purpose of the present invention is to provide a post-processing method for the magnetic core powder after pressing and molding, which can improve the yield. [0004] The technical scheme of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02
CPCH01F41/0246H01F41/02
Inventor 袁孔祥徐昌保
Owner 湖南迈特电子技术有限公司