Technological method and tool for manufacturing high-consistency sintered neodymium-iron-boron permanent magnet

The invention relates to a manufacturing method for a sintered neodymium-iron-boron permanent magnet material, specifically to a technological method and a tool for manufacturing a high-consistency sintered neodymium-iron-boron permanent magnet, and solves the problem of poor consistency of the permanent magnet manufactured by the prior art. According to the technological method, a protection layer covering process is added between a magnetic field oriented moulding process and a de-molding process, wherein the protection layer is a powdered mixture; and the powdered mixture is prepared from 70-80% of lanthanum powder, 20-30% of iron powder and number 120 solvent gasoline through the steps of stirring and mixing uniformly in an exhausted and sealed tank. By adoption of the manufacturing method, the problems of flux weakening, poor square degree and the like caused by degradation of the upper end plane of the magnet caused by a conventional production method are effectively solved, and the neodymium-iron-boron permanent magnet with excellent consistency is obtained finally.