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A kind of magnetic strip material prepared from magnetic conductive particles and preparation method

A magnetic and particle technology, applied in the fields of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of easy falling off of iron powder, cutting defects, delamination, etc., to improve mechanical strength, compact structure without The effect of hole and magnetic permeability is good

Active Publication Date: 2022-08-05
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The magnetic strip material produced by this method is prone to cutting defects at the cutting edge during cutting and forming in the later stage, which affects the strength of the edge of the magnetic strip material and makes the iron powder easier to fall off
Patent CN102255442 uses iron powder, phenolic resin, and glass fiber cloth to make adhesive tape body by molding process, and manufactures magnetic strip materials after cutting by cutting machine, which cuts off the glass fiber cloth layer during cutting, reducing the edge performance of glass fiber cloth. Causes cutting defects to reduce the mechanical strength of the edge of the magnetic strip material
Patent CN102169744 improves the lamination process. After mixing iron powder and resin, it is coated on glass fiber cloth to make a prepreg. After cutting, laying up, and hot pressing to manufacture a laminated magnetic plate, the laminated magnetic plate produced by this method is The magnetic permeability of the board has been improved, and the bending strength is about 300MPa, but cutting defects are still not avoided. The magnetic permeable board made of multi-layer prepreg superimposed by hot pressing is prone to delamination, and the strength of the glass fiber cloth itself limits the strength of the magnetic permeable board. The upper limit of the product is not ideal

Method used

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  • A kind of magnetic strip material prepared from magnetic conductive particles and preparation method

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preparation example Construction

[0025] A magnetic strip-shaped material prepared from magnetically conductive particles is formed by superimposing the magnetically conductive particles and iron sheets with grooves in sequence and then integrally molded by molding, and the preparation method includes the following steps:

[0026] (1) Preparation of magnetic conductive particles: after pretreatment of reduced iron powder with a coupling agent, mixed with solvent and adhesive or evenly mixed with solvent, adhesive and curing agent, and crushed into magnetic conductive particles;

[0027] (2) Pretreatment of iron sheet: After degreasing the iron sheet, open grooves with equal spacing on the surface of the iron sheet, and the grooves have an inverted triangular structure;

[0028] (3) Compression molding: such as figure 1 As shown in the figure, spread the magnetic conductive particles evenly on the bottom of the mold, put the pretreated iron sheets, and then put the magnetic conductive particles and the iron she...

Embodiment 1

[0030] A magnetic strip-shaped material prepared from magnetically conductive particles is formed by superimposing the magnetically conductive particles and iron sheets with grooves in sequence and then integrally molded by molding, and the preparation method includes the following steps:

[0031] (1) Preparation of magnetically conductive particles: Mix and stir 100 parts of 200 mesh reduced iron powder and 1 part of KH550 coupling agent, so that the coupling agent pretreats the reduced iron powder; then mix the treated iron powder with 10-20 parts of Toluene, 30 parts of epoxy resin, and 10 parts of acid anhydride curing agent are mixed and placed in a double planetary mixer to fully stir evenly. The mixed viscose after stirring is dried by an air dryer, and then broken into magnetic conductive particles with a diameter of 2 mm.

[0032] (2) Pretreatment of the iron sheet: take a thin iron sheet with a thickness of 0.2 mm, carry out degreasing treatment, and open an inverted...

Embodiment 2-3

[0035] Steps (2)-(3) in Example 2-3 are the same as those in Example 1, except that the diameter of the reduced iron powder in Step (1) is replaced with 50 mesh and 500 mesh in turn.

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Abstract

The invention relates to a magnetic strip material prepared from magnetic conductive particles. The magnetic conductive particles and iron sheets with grooves are stacked in sequence and then integrally formed by molding. The manufacturing method includes the pretreatment of preparing magnetic conductive particles and iron sheets. , the molding step. The magnetic strip-shaped material produced by the invention does not cause delamination and cutting defects, has high edge strength, and the iron powder is not easy to fall off, and has excellent mechanical strength and magnetic permeability.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a magnetic strip material prepared from magnetic conductive particles and a preparation method. Background technique [0002] Magnetic strip materials have a wide range of applications and have significant effects. For example, applying them to motors can effectively reduce magnetic density pulsation, reduce motor vibration and noise, reduce motor temperature rise, reduce motor additional losses, and improve motor efficiency. The magnetic strip material is prepared from a magnetically conductive material. Currently, the widely used magnetic strip materials include grooved mud type, laminated type and molded type. Slot type magnetic strip material has high magnetic permeability, but poor mechanical properties and unstable magnetic permeability; laminated magnetic strip material has excellent mechanical properties and good formability, but low magnetic permeability; mold...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F41/02H01F1/06
CPCH01F41/02H01F1/06
Inventor 胡益栋王关全冯燕婷陈瑞张燕华李焕狄宁宇
Owner 浙江博菲电气股份有限公司