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Bonded neodymium iron boron magnet and fast setting preparation method

A rapid curing, NdFeB technology, applied in the direction of magnetic objects, inductors/transformers/magnets manufacturing, magnetic materials, etc., can solve the problems of poor product consistency and long curing time, achieve dimensional consistency and strength improvement, and reduce production cost, and the effect of shortening the curing time

Inactive Publication Date: 2018-09-14
麦格昆磁磁性材料(滁州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of the problems of long curing time and poor product consistency in the existing bonded NdFeB magnet preparation scheme, a new bonded NdFeB magnet solution is needed

Method used

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  • Bonded neodymium iron boron magnet and fast setting preparation method
  • Bonded neodymium iron boron magnet and fast setting preparation method
  • Bonded neodymium iron boron magnet and fast setting preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0067]

[0068]

[0069] In this example, the preparation of bonded NdFeB magnets is completed through the following rapid preparation process:

[0070] (1) Crushing the flaky NdFeB magnetic powder through a 200-mesh sieve.

[0071] (2) Add 95 parts of sieved NdFeB magnetic powder and 0.5 part of nano-alumina powder to 6 parts of acetone solution with 1.5 parts of thermosetting binder and 0.2 parts of coupling agent KH-550, and stir until the acetone is completely Volatilize to get rubber powder.

[0072] (3) mixing the rubber powder obtained in step (2) with 0.2 part of zinc stearate to obtain a magnetic powder mixture;

[0073] (4) putting the magnetic powder mixture obtained in step (3) into molds and pressing under a certain pressing pressure to obtain a green body of magnet;

[0074] (5) The green body of the magnet obtained in step (4) was quickly cured i...

example 2

[0077] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0078]

[0079] In this example, the preparation of bonded NdFeB magnets is completed through the following rapid preparation process:

[0080] (1) Crushing the flaky NdFeB magnetic powder through a 250-mesh sieve.

[0081] (2) Add 96 parts of sieved NdFeB magnetic powder and 0.8 part of nano-alumina powder to 7 parts of acetone solution with 2 parts of thermosetting binder and 0.3 part of coupling agent KH-550, and stir until the acetone is completely Volatilize to get rubber powder.

[0082] (3) mixing the rubber powder obtained in step (2) with 0.4 part of calcium hard acid to obtain a magnetic powder mixture;

[0083] (4) putting the magnetic powder mixture obtained in step (3) into molds and pressing under a certain pressing pressure to obtain a green body of magnet;

[0084] (5) Rapidly solidify the green body of the magnet obtained in step (4) in a tunnel f...

example 3

[0087] The bonded NdFeB magnet provided in this example is composed of the following components by weight:

[0088]

[0089] In this example, the preparation of bonded NdFeB magnets is completed through the following rapid preparation process:

[0090] (1) Crushing the flaky NdFeB magnetic powder through a 220-mesh sieve.

[0091] (2) Add 97 parts of sieved NdFeB magnetic powder and 1 part of nano-alumina powder to 6.5 parts of acetone solution with 2.5 parts of thermosetting binder and 0.4 parts of coupling agent KH-550, and stir until the acetone is completely Volatilize to get rubber powder.

[0092] (3) uniformly combining the rubber powder obtained in step (2) and 0.4 part of zinc stearate to obtain a magnetic powder mixture;

[0093] (4) putting the magnetic powder mixture obtained in step (3) into molds and pressing under a certain pressing pressure to obtain a green body of magnet;

[0094] (5) Rapidly solidify the green body of the magnet obtained in step (4) in...

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Abstract

The invention discloses a bonded neodymium iron boron magnet and a fast setting preparation method. The bonded neodymium iron boron magnet comprises a thermosetting epoxy resin adhesive and a nano alumina powder component. Aiming at the bonded neodymium iron boron magnet, the thermosetting epoxy resin adhesive and trace nano alumina powder are added in a magnetic powder preparation process to realize fast setting preparation. By adoption of the scheme, product setting time can be shortened without increasing cost and reducing production strength and quality, and bonded neodymium iron boron magnet production efficiency improvement and production cost reduction are realized on the premise that product size uniformity and strength are guaranteed. In addition, favorable conditions are createdfor automatic flow production in a setting process and a pressing workshop, and product production efficiency and market competitiveness are improved.

Description

technical field [0001] The invention relates to bonded NdFeB magnets. Background technique [0002] Bonded NdFeB magnets have good formability, high dimensional accuracy, good consistency of magnetic properties, no need for post-processing, large degree of shape freedom, and low density. They can be widely used in electronic information, communications, instruments, and office automation. , medical equipment, automobiles, machinery and other fields. The most common are computer hard drives, DVD drives, printers, fax machines, air conditioners, speakers, electricity meters, clocks and other fields. [0003] The bonded NdFeB permanent magnet material adopts powder metallurgy technology and composite material technology. Among them, the compression molding process usually uses a thermosetting resin as an adhesive, and its basic process is as follows: [0004] 1) Powder making, the raw material bonded NdFeB magnetic powder is mixed with an adhesive to make rubber powder; [...

Claims

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Application Information

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IPC IPC(8): H01F41/02H01F1/057
CPCH01F41/0253H01F1/0578H01F41/0266
Inventor 高庆国杨友文陈宇凡
Owner 麦格昆磁磁性材料(滁州)有限公司
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