Preparing method for soft rubber NdFeB (neodymium iron boron) magnet

Abstract

The invention discloses a preparing method for a soft rubber NdFeB (neodymium iron boron) magnet and solves the problems that during the machining of the soft rubber NdFeB magnet in the prior art, the binding strength with rubber is lower, magnetic powder is easily stripped from the surface of a product, the tenacity is poor, cracking easily occurs, and the surface coating is easy to crack and strip. The method comprises the following steps of (1) surface modifying; (2) burdening; (3) open refining; (4) closed refining; (5) smashing; (6) tabletting; (7): laminating; (8) cutting; (9) spraying and (10) magnetizing. The raw materials of the NdFeB magnet and sprayed components of the coating are modified, before being subjected to the surface modifying, the rapid quenched NdFeB magnetic powder is preprocessed, and the drying process after the coating is sprayed is also optimally designed. The soft rubber NdFeB magnet manufactured by the preparing method has excellent strength and tenacity as well as excellent magnetic performance, and the binding strength of the coating at the surface of the soft rubber NdFeB magnet and the soft rubber NdFeB magnet is strong, so cracking difficultly occurs.

Description

technical field

[0001] The invention relates to a neodymium-iron-boron magnet, in particular to a preparation method of a flexible rubber neodymium-iron-boron magnet.

[0002] Background technique

[0003] NdFeB materials are high-performance metal magnetic materials. The traditional NdFeB processing is a sintering electroplating process. This process is highly dependent on the mold, and the product has high hardness (rigid NdFeB composite material) and large volume. Later, NdFeB materials were produced by mixing epoxy resin and other adhesives with NdFeB for molding, injection molding and other processes. The hardness of the product was also high, and it could not be bent, so it could not be made into a thin and flexible product.

[0004] With the miniaturization and precision transformation of various electronic and electrical products, more and more products need to use flexible magnetic materials that are thin in thickness, high in performance, and can be bent freely. ...