JPS5993741A - Manufacture of molded article of resin magnet - Google Patents

Abstract

PURPOSE:To manufacture a material, capable of exhibiting good moldability even on filling a large amount of ferromagnetic powder, and moldable into molded articles having high magnetic characteristics, by adding a titanate coupling agent to a step of mixing and kneading a synthetic resin as a matrix with the ferromagnetic powder. CONSTITUTION:A titanate coupling agent is added to a step of mixing and kneading a synthetic resin, e.g. polyamide resin or polypropylene, as a matrix with a ferromagnetic powder. The above-mentioned coupling agent acts as a plasticizer, and the ferromagnetic powder is highly oriented in injection molding in a magnetic field to give the aimed molded resin magnetic articles having high magnetic characteristics.

Description

[Detailed Description of the Invention] Is the present invention a molded product with high magnetic properties? Here, we will discuss the manufacturing method of 4g resin magnet molding material.

Conventionally, 11:'j magnets are made of polyamide-based materials such as 7-trinox, synthetic resins such as polypropylene resin, and vinyl chloride resin, and ferrite (MO/6Fe201, M
is obtained by injection molding a molding material made by mixing and kneading ferromagnetic powder such as Srt or Ba) by applying a magnetic field. In order to improve the magnetic properties of a molded article, it is necessary to fill it with a large amount of ferromagnetic powder and distribute it at a high rate. but,
If the ferromagnetic powder is filled to a certain level, the melt viscosity of the molding abrasive will become high, making injection molding impossible, or the ferromagnetic powder will be able to direct the magnetic field to +Y, producing molded products with high magnetic properties. I couldn't get it.

An object of the present invention is to provide a resin omega-stone molding material that can be formed well even when filled with ferromagnetic powder to a large amount L't, and can yield molded products with high magnetic properties. .

In order to achieve the object described in item 1, the present invention is characterized in that a titanate-based fluffing agent is added when mixing and kneading the synthetic 4rrl fat as the matrix and the ferromagnetic powder. It is. In this way, the pellet-like or paratal-like molding mill 1.1 acts as a titanate force, a pulling force, and a plasticizer, so even if it is filled with a large amount of ferromagnetic powder, it has a high viscosity. Injection molding can be performed well without causing problems. Therefore, by injection molding in a magnetic field, the ferromagnetic powder is highly oriented and a molded resin magnet with high magnetic properties can be obtained.

In addition, the synthetic resins that can be used include thermoplastic resins such as polyamide resin, polypropylene, and vinyl chloride resin;
', thermosetting properties such as fat; fat.

υ(, the firearm 1 pJ of the present invention will be explained.

Example melt t: 'J: Withering degree 2000 poise (250°C 1100
In particular, mix 1) 6 nylon pouch 113 weight 141 parts (hereinafter referred to simply as parts), strike [J nitium ferrite 87 parts, titanium ferrite), j, and cuff lick agent o5Q1≦ in a super mixer. did. This mixture was kneaded and combined in a twin-screw extruder to form a fillet, 1-shaped material 4.1.
, j.

Using this jjk shape material, perform injection T molding in a magnetic field.
Ii (1, -Ki 111 Earth 1 Rule>For L.Equation piece (2[H
'lX I OH) was i;ノ.

1. ([C9ki"+i'+ property of all specimens 13) 11.
The results are shown in Table 1 along with the viscosity of the molded I/J village and the distribution ratio of sulfur fluorite.

Example 1
．． te 1 person Performed in the same manner as Example 1, t-07ii'1
Show the results to the first person 4-8 Ratio Medium ζ I(':j l The same procedure as in Example I was carried out except without adding the titanium-1-based Cobb linking agent/, [Measurement results is shown in Table 1・l−
8 Table 1 As is clear from Table 1, according to the present invention, the first...! I
Even if the t5-based powder is filled with a high amount of H, H, it is possible to provide a 5-fat magnet molded product (n) with low viscosity and high magnetic properties. The f-curve is extremely important.

patent applicant

Claims (1)

[Claims] 7. A method for producing a resin magnet molded article, which comprises adding a titanate-based force and a bling agent when mixing and kneading a synthetic resin as 7-Trinox and a ferromagnetic powder.