JPS58164203A - Magnetic core - Google Patents

Abstract

PURPOSE:To facilitate the process of working by a method wherein a nonflowing cushion material of felt, etc., is provided as the damper material of the core. CONSTITUTION:The various materials of cotton felt, a glass fiber nonwoven fabric, etc., are used as the damper material of the nonflowing cushion. For example, the unwoven fabric made of a cotton thread of about 10mum thread diameter in 0.5mm.t thickness is spread on the bottom of a core case, and after the magnetic core is put therein, the unwoven fabric of the same is spread thereon, and a cover is put thereon. Accordingly the process of working can be facilitated.

Description

[Detailed description of the invention] Conventionally, a liquid material has been used as a tampering material for this type of core due to its heat resistance, but sealing of the core case is important, but this has not been given much attention. This is about a method that can be used.

It is desirable that the control magnetic core be used as a heat-resistant 150° C. vibration-proof structure. For this reason, silicone oil or the like has conventionally been used as a damper material. Since this is a liquid, it is necessary to completely seal the core case to prevent liquid leakage. For this reason, 11! The manufacturing process requires adhesive to ensure complete sealing. Furthermore, the ability of the core case and lid to fit together is also an important point for sealing performance.

The purpose of this proposal is to use a new material that can satisfy the initial purpose as a damper material, in order to solve the difficulty of the work process in these conventional techniques.

This type of damper material in the prior art consists of a superimposed layer of silicone oil. In addition, it is not liquid and can also be used as a case [If solidified mw fat is used, the resin will solidify.
Characteristics may change due to stress applied to the magnetic core.

In order to solve these problems, we conducted experiments using various materials as damper materials, including cotton felt and dull fiber nonwoven fabric, and as a result, we were able to stabilize manufacturing operations, improve yields, and improve quality6.

Example 1 Cotton thread with a diameter of about 10μ and a thickness of α5■tK non-woven fabric was laid on a core case hawk, and after the magnetic core was stuffed, a similar non-woven fabric was laid on top and the lid was closed. As a result, the characteristics were determined. There was no effect and there was no problem in manufacturing even if the adhesive was applied unevenly.

Example 2 A nonwoven fabric made of glass fiber with a wire diameter of about 10 μm and a thickness of α5×t was prepared in the same manner as in Example 1, and as a result, it could be used without any problem. It should be noted that good results were also obtained when a solid damper material and a fluid member material were used together, and it was found that these effects are particularly pronounced when an amorphous material is used.

The use of cloth as the damper material makes it easy to handle, and the core case can be secured with adhesive.

[Brief explanation of drawings]

The first figure is a cross-sectional view showing an example of the magnetic core according to the present invention 11.

Claims (1)

[Claims] t. A wound core characterized in that a non-flowable bushing material is provided between the core and the core case. 2. A magnetic core according to claim 1, characterized in that felt, nonwoven fabric, or organic tung fat is used as the non-flowing carbon material. (v) A magnetic core according to claims 1 and 2, characterized in that a non-flowable cushioning carbon material is impregnated with a fluid cushioning agent. 4. A magnetic core according to claim 1, 2, or 3, characterized in that 50% or more of the core material is in an amorphous state.