Manufacturing method for thermoplastic compound macromolecule bonded magnet

Abstract

The invention provides a manufacturing method for a thermoplastic compound macromolecule bonded magnet. The manufacturing method comprises the following steps: taking and uniformly mixing neodymium iron boron rare earth magnetic powder and ferrite magnetic powder; adding the mixed magnetic powder into an acetone solution dissolving a silane coupling agent and performing a coupling treatment; taking an epoxy resin binder, dissolving in acetone and forming a solid gum, and volatilizing the acetone; soaking the magnetic powder after the coupling treatment into a fixing glue solution, fully mixing for more than 12 hours and drying, thereby forming a mixture; adding a zinc stearate lubricating agent into the mixture , heating to 90-110 DEG C, keeping constant temperature, pressing and treating for a preset time duration under the pressure more than 1000MPa, thereby acquiring a blank; heating the blank to be at 180 DEG C under inert atmosphere, injecting and forming, and adding solidifying agent for solidifying. According to the manufacturing method provided by the invention, the liquidity of mixture slurry mixed by the bonding agent and the magnetic powder is promoted, the temperature range for causing the slurry to have the liquidity is widened, and the method is fit for the production of articles of various complex shapes.

Description

technical field [0001] The invention relates to the field of magnetic materials, more specifically, to a high magnetic rare earth magnetic powder applied to a flexible magnetic strip and a production process thereof. Background technique [0002] NdFeB rare earth permanent magnet belongs to the third generation rare earth permanent magnet material, its raw material cost is relatively low, and it has excellent magnetic properties. At present, NdFeB rare earth permanent magnet materials have become an indispensable important material in industrial production and daily life, and are widely used in industries such as computers, communications, instruments, and home appliances. [0003] The development of NdFeB rare earth permanent magnets also plays an important role in magnetic therapy and health care. A large number of medical studies have shown that the use of magnetic fields to act on human tissues can regulate the nervous system and blood circulation, and has the effect of...

AI Technical Summary

Problems solved by technology

In the prior art, in order to improve the magnetic properties of the magnet, the content of the magnetic powder is increased as much as possible, but the reduction of the binder content in the bonded magnet will affect the fluidity of the thermoplastic process, and will cause the magnet to appear microscopically, reducing the mechanical properties of the product. Strength, resulting in a decline in product quality

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