A kind of manufacturing method of thermoplastic composite polymer bonded magnet

Abstract

The invention provides a method for manufacturing a thermoplastic composite polymer bonded magnet, which comprises uniformly mixing NdFeB rare earth magnetic powder and ferrite magnetic powder; then adding the mixed magnetic powder into an acetone solution in which a silane coupling agent is dissolved Carry out coupling treatment; take the epoxy resin binder, dissolve it in acetone to form a solid glue, and volatilize the acetone therein; then immerse the magnetic powder after the coupling treatment in the fixing glue solution and mix thoroughly for more than 12 hours and dry to form a mixture; the mixture is added to the lubricant of zinc stearate, then heated to 90 to 110 degrees Celsius and kept at a constant temperature, and pressed with a pressure above 1000MPa for a predetermined period of time to obtain a blank; the blank After being heated to 180 degrees Celsius under an inert atmosphere, injection molding is added and a curing agent is added for curing. The invention improves the fluidity of the slurry mixed with the binder and the magnetic powder, expands the temperature range for making the slurry fluid, and is applicable to the production 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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