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I-shaped magnetic core and manufacturing method thereof

An I-shaped, manufacturing method technology, applied in the direction of transformer/inductor core, inductor/transformer/magnet manufacturing, inorganic material magnetism, etc., can solve the problems of small contact surface, poor electrical conductivity, poor inductance firmness, etc. The effect of high production efficiency, good electrical conductivity and easy assembly

Inactive Publication Date: 2012-02-22
深圳市金核科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current welding part of the inductor is a point-type welding foot, because the contact surface between the point-type welding foot and the circuit board is small, the conductivity is poor, and the firmness of the inductor is poor under strong impact

Method used

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  • I-shaped magnetic core and manufacturing method thereof
  • I-shaped magnetic core and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An I-shaped magnetic core, comprising two ends 1, a middle groove 2, a cover plate 3 and welding feet 4, the cover plate 3 is fixedly connected to the two ends 1, and the lower end of the two ends 1 has four Welding feet 4, the ends of the welding feet 4 are planar ends, the two ends 1 are cuboid-shaped two ends 1, and the middle groove 2 is a cuboid-shaped middle groove 2.

[0026] The two ends 1 are the two ends 1 of nickel zinc ferrite material.

[0027] The middle groove 2 is made of nickel zinc ferrite material.

[0028] The cover plate 3 is a cover plate 3 made of nickel-zinc ferrite material.

[0029] A method for manufacturing an I-shaped magnetic core, comprising the following steps:

[0030] 1) Molding: Under the pressure of 100MPa, the nickel-zinc ferrite pellets are pressed into a green body in a mold, and the density of the green body is 2.8g / cm 3 , using vibrating equipment to remove the burrs of the green body;

[0031] 2) Sintering: put the green bod...

Embodiment 2

[0034] An I-shaped magnetic core, comprising two ends 1, a middle groove 2, a cover plate 3 and welding feet 4, the cover plate 3 is fixedly connected to the two ends 1, and the lower end of the two ends 1 has four Welding feet 4, the ends of the welding feet 4 are planar ends, the two ends 1 are cuboid-shaped two ends 1, and the middle groove 2 is a cuboid-shaped middle groove 2.

[0035] The two ends 1 are the two ends 1 of nickel zinc ferrite material.

[0036] The middle groove 2 is made of nickel zinc ferrite material.

[0037] The cover plate 3 is a cover plate 3 made of nickel-zinc ferrite material.

[0038] A method for manufacturing an I-shaped magnetic core, comprising the following steps:

[0039] 1) Forming: Under the pressure of 240MPa, the nickel-zinc ferrite pellets are pressed into a green body in a mold, and the density of the green body is 3.2g / cm 3 , using vibrating equipment to remove the burrs of the green body;

[0040] 2) Sintering: put the green bod...

Embodiment 3

[0043] An I-shaped magnetic core, comprising two ends 1, a middle groove 2, a cover plate 3 and welding feet 4, the cover plate 3 is fixedly connected to the two ends 1, and the lower end of the two ends 1 has four Welding feet 4, the ends of the welding feet 4 are planar ends, the two ends 1 are cuboid-shaped two ends 1, and the middle groove 2 is a cuboid-shaped middle groove 2.

[0044] The two ends 1 are the two ends 1 of nickel zinc ferrite material.

[0045] The middle groove 2 is made of nickel zinc ferrite material.

[0046] The cover plate 3 is a cover plate 3 made of nickel-zinc ferrite material.

[0047] A method for manufacturing an I-shaped magnetic core, comprising the following steps:

[0048] 1) Molding: Under the pressure of 160MPa, the nickel-zinc ferrite pellets are pressed into a green body in a mold, and the density of the green body is 3.0g / cm 3 , using vibrating equipment to remove the burrs of the green body;

[0049] 2) Sintering: put the green bod...

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Abstract

The invention discloses an I-shaped magnetic core and a manufacturing method thereof. The I-shaped magnetic core comprises two end parts, a middle groove, a cover plate and a welding pin, wherein the tail end of the welding pin is a planar tail end, the two ends are two cuboid ends, and the middle groove is a cuboid middle groove. The manufacturing method adopts moulding and once sintering to obtain the product. According to the invention, the tail end of the welding pin is planar and is firmly welded with a circuit board, thus ensuring good electric conduction; the four welding pins are coated with silver, thus metal pins are reduced, and the product assembly is facilitated; due to the cuboid two ends and middle groove, the mould opening is convenient when a mould is adopted for production; the two cuboid ends can be firmly clamped by a fixture for winding, and the production efficiency is improved; a winding inductor has the advantages of a closed magnetic circuit inductor; and the main magnetic core is integrally formed by a mould, then the grooving process of the traditional magnetic core can be saved, the material waste as well as environmental pollution caused by dust is reduced, the process is simplified and the production efficiency is high.

Description

technical field [0001] The invention relates to an I-shaped magnetic core, in particular to a closed magnetic circuit I-shaped magnetic core and a manufacturing method thereof. Background technique [0002] Current power supply products are all developing toward high frequency, small size, light weight, and high power. Therefore, it is necessary to reduce the volume of each component, which leads to higher requirements for the structure of the product. Among them, the inductance must also meet the requirements of miniaturization of power supply products, and the size of the magnetic core can basically determine the size of the inductance. [0003] The magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. For example, manganese-zinc ferrite and nickel-zinc ferrite are typical core body materials. Among them, nickel-zinc ferrite has the characteristics of extremely high resistivity and low magnetic permeability, and has the advantag...

Claims

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Application Information

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IPC IPC(8): H01F27/26H01F27/255H01F1/36H01F41/02
Inventor 巫济辉
Owner 深圳市金核科技股份有限公司