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Compression molding die

A press molding and mold technology, applied in the field of permanent magnet production equipment, can solve the problems of uneven magnetic field, affecting the quality of sintered NdFeB products, etc.

Inactive Publication Date: 2014-12-10
京磁材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, since the small side plates constituting the mold are not magnetically conductive, the magnetic field lines of the magnetic field cannot fully penetrate the small side plates, resulting in an uneven magnetic field near the small side plates, so that the magnet particles close to the small side plates have a large magnetic field. The deflection angle affects the product quality of sintered NdFeB

Method used

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Embodiment Construction

[0022] The invention provides a pressing mold, which can make the magnetic field close to the small side plate more uniform, reduce the magnetic declination of the magnet particles close to the small side plate, and improve the product quality of sintered NdFeB.

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as Figure 1-Figure 3 As shown (the slanted line in the figure is for the convenience of distinguishing parts, and it is not a section line), the compression molding die provided by the e...

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Abstract

The invention discloses a compression molding die used in compression of neodymium iron boron green bodies. The compression molding die comprises non-magnetic conductive small side plates and magnetic conductive plates arranged on the cavity wall enclosed by the small side plates. By the additional arrangement of the magnetic conductive plates in the compression molding die, the situation of nonuniform magnetic fields at the positions close to the small side plates is avoided, larger magnetic declination generated from magnet particles at the positions close to the small side plates are avoided, and quality of sintered neodymium iron boron products is further improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet production equipment, and more specifically, relates to a pressing mold. Background technique [0002] Among many permanent magnet materials, sintered NdFeB has excellent magnetic properties, so its application fields are very wide. In the manufacturing process of sintered NdFeB, after the powder making process is completed, it is necessary to press the powdered magnet particles in the orientation magnetic field, that is, to press the magnet particles into larger cubes, cylinders or hollow cylinders. blank, which is then sintered. [0003] In the process of pressing the magnet particles, firstly, the magnet particles need to be put into the mold, and then through the electromagnetic induction coil on the double magnetic field forming press, a magnetic field force is applied to the magnet particles in the mold, so that the magnet particles located in the magnetic field of the electromagne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/03
Inventor 李磊
Owner 京磁材料科技股份有限公司
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