JPS6016166A - Manufacture of ferrite magnet pole of magnet motor stator - Google Patents

Abstract

PURPOSE:To obtain a ferrite magnet pole which has ready manufacture and excellent properties by filling, sintering magnetic powder in a die formed with a cylindrical cavity, pressurizing and removing in the axial direction of the cylindrical shape. CONSTITUTION:A cylindrical molding cavity 7 opened at both ends is formed at the center of a die 6 of a sole cylinder, and magnetic powder 8 is filled between a lower punch 9 and an upper punch 10 engaged with the cavity 7. Then, the cavity is pressed by the punches 9, 10 in directions of arrows Q1, Q2. A molded product 8a thus obtained is removed from one hole of the cavity 7 in the direction of an arrow Q. The removed product 8a is then heated and baked to be applied with necessary strength. According to this method, the molding of the molded product is performed under high pressure, and can be continuously performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a ferrite magnet ball for a magnet-driven stator, and particularly relates to a method for manufacturing a ferrite magnet ball in the shape of a hollow cylinder to be fixed to a magnet motor stator. It is something.

Conventionally, this type of manufacturing method was called Tokkosho! ;A-! /'I
There is a method disclosed in Publication No. 11, which can be summarized with the help of a diagram. Magnetic powder is filled between the lower punch piece and the upper bunch 3 that engage the die 1K, as shown in Figure (a), In the magnetic field caused by the excitation of the magnetic field coil S, the magnetic powder is pressed as shown in FIG. 2(b) to form a molded product. However, the hollow cylindrical molded product Qa obtained after 5K is
As shown in FIG. 5 (c) & C, the molding is performed using pressure in the KP1 direction, that is, in the direction perpendicular to the cylinder axis, which has the disadvantage that material defects such as debris entering the end face of the molded product f+a are likely to occur. Furthermore, since sufficient pressure is not applied, molded products of satisfactory quality cannot be obtained, and the removal process is complicated.

This invention was made in view of the above-mentioned points, and the sintering magnetic powder is brought into a die formed with a cylindrical space at the speed of light, pressurized in the axial direction of the cylinder, and taken out. It is an object of the present invention to provide a method for manufacturing a seven-piece light magnet ball for a magnet motor stator that eliminates the problem.

An embodiment of the present invention will be described below with reference to FIG. In FIG. 2(a), (b), a cylindrical molding space 7 with both ends open is molded in the center of the single cylindrical die B, and as shown in FIG. 2(a),
Magnetic powder g is filled between the lower punch 9 and the upper punch io that engage this molding space 7. Then use the lower punch 9 and the upper punch 10 to hit the arrow Q1. Apply pressure in the direction of Q2. The molded product ffa thus obtained is taken out from one opening of the molding space 7 in the direction of the arrow Q, as shown in FIG. 2(b). The molded article a taken out is then heated and fired to give it the necessary strength.

According to the above method, the molded product can be molded under extremely high pressure and can be molded continuously.

Although the above embodiments are based on a dry manufacturing method in which magnetic powder is pressure-molded, a dry manufacturing method using wet mixed materials may also be used, in which semi-fluid magnetic powder mixed with a liquid is The product is continuously molded using a die as shown in the figure, taken out as a rod-shaped molded product, dried, sintered, and cut into a predetermined length in the axial direction to obtain a ball for a magnetic motor stator.

As is clear from the above description, this invention is a method in which magnetic powder is pressurized in the axial direction of the pole and the molded product is taken out in the axial direction, so it is easy to manufacture and ferrite magnetic balls with excellent characteristics can be obtained at low cost. It is effective.

[Brief explanation of the drawing]

Figure 1 explains the conventional method (a), (b)
(C) Ii1! is a front cross-sectional view shown in the order of steps. l is an oblique view of the molded product, 6...Dice, 7...Molding space, g...Magnetic powder, ffa...Molded product, 9...Lower bunch, IO...Upper bunch. In each figure, the same reference numerals indicate the same or corresponding parts. Agent Masuo Oiwa

Claims (2)

[Claims] (1) Using a single cylindrical die with a molding space open at both ends in the axial direction, filling the molding space with magnetic powder, and applying pressure force in the axial direction to the magnetic powder. A method for producing a ferrite magnet ball for a magnet motor stator, which comprises the steps of: (1) taking out a pressurized molded product from one of the openings; and (2) heating and firing the taken out molded product. (2) A ferrite magnet ball of a magnet motor stator according to claim 1, wherein the magnetic powder is a wet mixed material, and a rod-shaped molded product taken out from a die is heated and fired, and then cut into a predetermined length. Production method.