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Ultra-thin soft magnetic ferrite magnetic core preparation process

A soft ferrite and preparation process technology, applied in inductor/transformer/magnet manufacturing, manufacturing tools, magnetic objects, etc., can solve the problems of low production yield and complex cross-sectional shape, and achieve the effect of improving structural stability

Inactive Publication Date: 2020-02-28
安徽怡娅通科技有限公司
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  • Abstract
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Problems solved by technology

[0002] Ferrite core is a high-frequency magnetic material, mainly used for high-frequency transformers, high-frequency magnetic rings, etc. As we all know, the initial shape of the soft ferrite core is made of dry powder powder pressed through a mold. During production, the yield rate of magnetic cores with complex cross-sectional shapes, elongated or sheet shapes is low. For this reason, we propose a preparation process for ultra-thin soft ferrite cores to solve the problems in the above-mentioned background technology. mentioned problem

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  • Ultra-thin soft magnetic ferrite magnetic core preparation process

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Embodiment 1

[0019] The invention provides a preparation process of an ultra-thin soft ferrite core, comprising the following steps:

[0020] S1: Put the raw materials that have been sanded in proportion into the mixer for repeated stirring, then put the evenly mixed raw materials into the extrusion molding machine for extrusion, and continuously extrude a certain cross-sectional shape by changing the shape of the extrusion die Product blanks, testing the moisture content of product blanks;

[0021] S2: Fix the qualified product blank through the matching mold, and stretch out the piston rod of the hydraulic cylinder to maintain the pressure on the mold;

[0022] S3: Pre-burning qualified product blanks, the pre-burning temperature is controlled at 850-920°C, and the pre-burning time is 2.5-4.5h, so that the moisture content of the pre-fired blanks is controlled between 2-5%;

[0023] S4: For sintering, it is required that the heating rate is not higher than 0.7°C per minute in the temper...

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Abstract

The invention discloses an ultra-thin soft magnetic ferrite magnetic core preparation process. The ultra-thin soft magnetic ferrite magnetic core preparation process includes the following steps: S1,proportioned and sanded raw materials are placed into a stirrer to be repeatedly stirred; S2, a qualified product blank is fixed through a mold matched with the qualified product blank, and pressure maintaining is conducted on the mold; S3, the qualified product blank is presintered; S4, sintering is conducted; S5, a semi-finished product is polished through an air gap grinding wheel on a grindingmachine, and then put into a container, a magnetic core of the semi-finished product is immersed through pure epoxy resin paint, a container is vacuumized and pressurized to reach 0.4-0.6 MPa, pressure maintaining is conducted for 40-80 minutes, and the semi-finished product is taken out and then dried in a drying box. It is ensured that the blank has sufficient strength to be suitable for circulation handling, the phenomenon of cracking of the blank due to too fast dehydration can also be prevented, and a series of technical difficult problems of forming of soft magnetic ferrite magnetic cores which are ultra-thin, have complex shapes, slender strip shapes, sheet shapes and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of magnetic cores, and in particular relates to a preparation process of an ultra-thin soft ferrite magnetic core. Background technique [0002] Ferrite core is a high-frequency magnetic material, mainly used for high-frequency transformers, high-frequency magnetic rings, etc. As we all know, the initial shape of the soft ferrite core is made of dry powder powder pressed through a mold. During production, the yield rate of magnetic cores with complex cross-sectional shapes, elongated or sheet shapes is low. For this reason, we propose a preparation process for ultra-thin soft ferrite cores to solve the problems in the above-mentioned background technology. mentioned issues. Contents of the invention [0003] The purpose of the present invention is to provide an ultra-thin soft ferrite core preparation process to solve the problems raised in the above-mentioned background technology. [0004] In order to ...

Claims

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Application Information

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IPC IPC(8): B28B3/20B28B17/02B28B11/24H01F1/34H01F41/02
CPCB28B3/20B28B11/243B28B17/02H01F1/344H01F41/02
Inventor 徐杰周福林曾性儒张宗仁
Owner 安徽怡娅通科技有限公司
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