Flow channel device capable of extruding out a plurality of magnets once for extruding machine and preparation method using same

Abstract

The invention provides a flow channel device capable of extruding out a plurality of rare earth magnets once for an extruding machine, and a method for preparing the plurality of the rare earth magnets extruded out once by the extruding flow channel device. The flow channel device comprises a device main body (1), a core rod (2), a cooling pipe (3), a cooler (5), a main heat flow channel (6), a plurality of branched heat flow channels (7), temperature sensors (8) and (12), and a mixing material inlet (9). The flow channel device can efficiently obtain novel rare earth magnets which have even texture, uniform magnetic property, high dimension precision in the length direction and good corrosion resistance without conicity and needle eyes.

Description

technical field

[0001] The invention relates to a channel device for extruding multiple pieces of rare earth magnets at one time for an extrusion molding machine, and a method for preparing multiple rare earth magnets at one time by using the extrusion channel device. Background technique

[0002] One of the main application fields of permanent magnet materials is motors. In the structure of most micro motors, the permanent magnets are in the shape of rings or tiles. The gap between the permanent magnets and the rotor is very small, 0.10-0.15mm or even smaller. It is accumulated by permanent magnet tolerance, rotor tolerance, assembly tolerance, etc. The large tolerance of the magnet or the taper in the length direction will directly affect the change of the gap size, thereby affecting the strength and reasonable distribution of the gap magnetic field, causing the motor to run unstable, and there are many technical problems such as noise and vibration. Therefore, in additio...

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