Method for preparing high-performance halogen-free environment-friendly rubber-plastic NdFeB (neodymium, iron and boron) extruded magnetic strip and magnetic strip

Abstract

The invention discloses a method for preparing a high-performance halogen-free environment-friendly rubber-plastic NdFeB (neodymium, iron and boron) extruded magnetic strip, which is characterized by comprising the following steps: (1) raw material mixture preparation: preparing an even raw material mixture of NdFeB powder, coating agents and adhesives, wherein the particle size of the even raw material mixture is 10-200 nanometers; (2) film extrusion: setting an extrusion thickness range of an extruder, feeding the raw material mixture into the extruder, and carrying out continuous extrusion on the raw material mixture so as to obtain a plastic-magnetic film; (3) cutting: cutting the plastic-magnetic film according to the preset shape and size; (4) UV glazing: painting UV gloss oil on the surface of the obtained magnetic strip so as to form a layer of protective film on the surface of the magnetic strip; and (5) magnetization: putting the magnetic strip into a magnetic field to be magnetized, thereby obtaining a finished magnetic strip. The invention also discloses a high-performance halogen-free environment-friendly rubber-plastic NdFeB extruded magnetic strip prepared by the method. The invention can be widely used for manufacturing flexible rubber-plastic magnetic products.

Description

technical field [0001] The invention relates to a polymer composite mixture, in particular to a preparation method of a high-performance halogen-free and environment-friendly rubber-plastic neodymium-iron-boron extruded magnetic strip and the magnetic strip used for manufacturing high-performance electromagnetic power equipment and adopting nanotechnology. Background technique [0002] With the development of society, especially the rapid development of various electric vehicles, maglev trains, high-performance motors, generators and other technologies, the demand for high-performance magnetic products is increasing, and the requirements for product characteristics are also increasing. . [0003] In the prior art, molding, injection and extrusion processes are mostly used in the processing of bonded rare earth magnets, and the magnets produced are rigid and inelastic. However, the molding and injection molding processes require a large number of molds of different specificat...

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the NdFeB powder produced and sold mostly has a particle size of 100-200 mesh, which can meet the production of sintered NdFeB magnets, but cannot meet the production of bonded magnets, especially the Production requirements of high-performance plastic magnetic products

Existing plastic magnetic products have deficiencies in many aspects such as flexibility, impact resistance, high temperature resistance, etc., and the thickness of the products produced is relatively large, usually above 1mm, which cannot meet the requirements of micro motors, micro motors and other products. needs

[0008] The preparation method of the bonded rubber-plastic magnet in the prior art, as disclosed in the Chinese patent application 200410052150.3 titled "A Method for Manufacturing a Flexible Bonded NdFeB Magnet According to Claim 1", requires the already The modified rubber binder, NdFeB magnetic powder and processing aids are mixed evenly in proportion. The mixing method adopts banbury mixing, open milling, stirring or screw mixing, and then the mixed The rubber material is made into a magnet with a certain thickness by calendering or flat pressing, and then magnetized and cross-linked. The steps are complicated, the equipment and raw materials required are more, the process and product quality cannot be accurately controlled, and impurities are inevitably generated during the production process. affects the final mass of the magnet