JPS62264601A - Plastic magnet conposite - Google Patents

Abstract

PURPOSE:To improve extrusion formability and orientation by adding 0.01wt%-4wt% of antifriction material to a mixture composed of permanent magnet powder and organic resin which is binder. CONSTITUTION:A mixture 3 composed of permanent magnet powder and organic resin which is binder is transferred forward in a barrel 2 by a screw 1 and extruded and molded by an extrusion die 7 and a core 9. By a yoke 5 and a coil 6 on the extrusion die 7, a magnetic field orientation part 8 is formed. Then, the molded product is air-cooled by a nozzle 11 and solidified to form a cylindrical magnet 10. 0.01-4wt% of antifriction material is added to the mixture 3. With this constitution, extrusion formability and the orientation in the magnetic field can be improved.

Description

[Detailed description of the invention] [Yuna J: ■Field of use] The present invention relates to a glasstic magnet composition.

[Conventional Q technology]

Conventional O plastic amulet composition has been disclosed in Japanese Unexamined Patent Publication No. 1973
No. 9-12783 No. 0 discloses a glasstic resin composition used for resin magnet molding and the like.

[Problem that the invention seeks to solve]

However, as mentioned above, the conventional technology is a strong @Note powder Qτ or '1
1 B r 7-grade light magnet powder, so Za[U, 2μ
This is a method of extrusion molding by heating to around 250° C. in a mixture with a binder-free polyamide resin using very fine particles of 5 μm to 5 μm and oxides. Although calcium stearate and the like are added here as a t-a type moving agent, this FL is only a method of external magnetic field forming of 51 stone O ferrite. However, due to the high extrusion pressure and large orientation magnetic field β, ■Vc is unsuitable for rare earth F11 stone O extrusion cutting shapes. The powder particle size is 3 μm to 150 μm, which is very large, and there is a problem that passing through the mold as a fine powder to coarse powder can easily hinder suction pouring. Therefore, the purpose of the present invention is to solve these problems.

The purpose is to improve the extrusion colorability, and the purpose is to increase the degree of orientation.

[Means to solve the problem]

The plastic magnet composition of the present invention is a mixture (compound) consisting of permanent magnet powder and a binder [lfi' + Ru. Here, the permanent gravestone is made of rare earth magnets, 1-5 series, 2-47 series, 1 shaku? Targets 8-B series. Preferable material is F3mc O@ series a
m(Co baJ Cu6.@1'#O,l Zfo
, oz) 74 j 'mo, s Yo, a CCo b
aJCu6@o7 I'g O,15Z? “0.0!
)7.4, Bm(Co b(Lip c
sa, Oy 'g MI Tt o, ot) 7.4
Ndts F'$77 Ba (Ceo, *
Targets 0 rare earths such as Pro, s Hdha ) ts FetrBs, etc. Here, the rare earth magnet O powder particle size is 3-54 m in the 1-5 series.

2-17 series ri3 A m ~150 A rn,
R-'! ! #-B series has a thickness of 5 to 200 μm. Also a binder.

Polyamide, polyethylene, polyester.

FVA Boliguropyre/etc. In addition, the anti-friction material is boron nitride% (Bll molybdenum disulfide, (M,)s
t), graphite (C), stearic acid, calcium stearate, zinc stearate, calcium carbonate 7:11f
i or l-! 26i or more may be mixed, the addition amount is 0
．． If the amount is less than 0.01 wt%, the effect of improving mold fit is small.

When the weight exceeds 4 wt, the amount of non-injected substances increases, resulting in poor air permeability and bonding strength.

By using the magnetic field extrusion molding equipment, we can provide rare earth resin magnets in sheet shapes, bike shapes, cylinder shapes, and other irregular shapes.

[Implementation row-1] [Figure 1 shows the β9 used in the present invention and the comparison row, and the completion of extrusion in the field. The raw material comparand 3 is fed forward through the screw 1 in the barrel. .

50 yoke, 67) The magnetic field is concentrated at 8Vc by the coil and is about 8 to 10 KO#.7 is an extrusion mold and is made of BUJ-2 material. 9 is the core, which is also made of 5Uy-2 materials, and the primary Ebisu cedar material is air-cooled and solidified by the 11-inch nozzle.

Here, the magnet powder is a 2-17 series alloy powder with a 7.1 composition (CObαI/C%. 0.5.32 de., 0.0) and a grain size of 3 μm-7.1 μm. This powder was mixed with a mixture of one part (VQi, %), the rest being polyethylene with a chlorine ratio, and a lubricant, and a compound was prepared using a kneader. Figure 1: Pig-shaped permanent magnet was cut out using an extrusion molding tool. The outline of the cylindrical stone was φα) x inner diameter 18 x 30 m (length).

The comparative row contains no anti-friction agent.

On the other hand, in the method of the present invention, 0.1 u$ to 5 wt % of ultrafine powder of boron nitride (BN) with a grain size of 0.5 μ to 1.5 μ is added as a deodorizing agent.

Figure 3 shows changes in magnetic properties (BT). This is because the powder orientation degree can be understood as a change in BT (residual magnetic flux density) O. According to SotLK, the method of the present invention had the effect of improving Bf from 5.8 KG to a maximum of 5.3 KG compared to the comparison train.

[Implementation row-2] Magnet powder d, RB(Co b(LIpC%h011P
aD-mτi o,ot) t, a 2-17 composition alloy t-engraving, magnetic hardness ratio υ, even if O heat treatment @ is applied, υ is not used, so O powder particle size is,! - The average value was in μm.

1st flame Vc raw material compound■ The volume of Seikyoki 1 yen is listed.

Nail 2 Front Note that the υ composition ratio in each case is simulated as one layer.

The extrusion molding conditions were as follows: The shape of the sample was the same as that of the two figures, and υ was also ■.

The 3rd wXa table shows that the 9 magnets exhibited excellent magnetic properties and mechanical properties.The effect of adding the lubricant of the present invention is as follows:
It has advantages such as increasing the ability to perform music and improving physical customization. 7) The reason is that the 1# friction coefficient O of the compound and the compound in the FiBL extrusion process is reduced, which is due to the fluidity modification effect. As can be seen from this example, solid lubricants are effective, but they are heat resistant like extrusion molding (because they mold at about 120 to 300°C). It was found that it had a great effect on the stomach.

[Invention D5ehMk] As mentioned above, according to the method of the present invention, it is possible to create a custom-made product, a custom-made product, and a special-order physical product.

Among them, is it effective to increase chronic attention? I feel sick to my stomach.

Magnetic Tsubaki 8: υ The high bendability is due to the increased orientation during tapping and the high density ratio effect. This is also due to the lubricating flux = 0 addition of anti-friction agent 77EI.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the m-field extrusion device in the VC of the present invention. Figure 2 is an overview of the extrusion molding magnet. Figure 3 is a diagram showing the speed reducer addition and magnetism in the actual tM column 11'C. :DBrD correlation? Figure 1 shows: Screw 2111 Barrel 3 Compound 4 * 11 @ Heater 5 Work Yoke 6 Coil 7 Mold 8 Magnetic field orientation part 9 @ Core 10 -... Cylinder - Stone 11... - Cooling air nozzle and Applicant Seiko Epson Aji Shikikai (Fig. 2)

Claims (1)

[Claims] A plastic magnet composition characterized in that 0.01% to 4% by weight of an anti-friction material is added to a mixture (compound) of permanent magnet powder and an organic resin as a binder.