Magnetic field generating apparatus, method for manufacturing ferrite magnet, and mold

A technology of ferrite magnets and manufacturing methods, applied in the field of metal molds, can solve the problems of slurry temperature drop, molded body density unevenness, dispersion medium viscosity rise, etc., to reduce defective products, increase pass rate, and uniform density effect
CN1764991AActive Publication Date: 2006-04-26TDK CORPARATION
3 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TDK CORPARATION
Publication Date
2006-04-26

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

An object of the present invention is to provide a magnetic field shaping device, a ferrite magnet manufacturing method, etc., which can improve the yield of the manufacturing process and stabilize the quality. When performing magnetic field shaping, a female mold (19) having a plurality of mold cavities (13) is heated to a predetermined temperature by a heater member (20) under the control of a controller (23). As the heating temperature, it is preferable to control with the controller (23) so that the temperature (T1) of the female mold (19) detected by the sensor (22) is 40°C or more. In this way, by heating the female mold (19), the temperature of the molding slurry in the cavity (13) can be increased, so that the dehydration property can be improved, and the yield of the product can be improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a magnetic field shaping device, a method for manufacturing ferrite magnets and metal molds for them. Background technique

[0002] When manufacturing ferrite (sintered) magnets that have become the mainstream of magnets, the raw materials are mixed in a predetermined ratio, and then calcined to ferrite, and then the obtained calcined body is crushed to a submicron size to obtain Finely pulverized powder composed of ferrite particles. Next, the finely pulverized powder is compression-molded through a metal mold in a magnetic field (hereinafter referred to as magnetic field forming) to obtain a molded body, and the molded body is sintered to obtain a ferrite magnet.

[0003] The magnetic field forming process can be broadly classified into a dry process in which the material is dried and then formed, and a wet process in which the material is formed into a slurry.

[0004] In the case of magnetic field forming by a wet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More