JPH05309320A - Method for coating magnetic core - Google Patents

Abstract

PURPOSE:To bond paint to a work such as a magnetic core in a non-contact state and to cure the bonded paint in a non-contact state. CONSTITUTION:A work 1 is floated in the air and paint 2 is bonded to the work 1 during flotation and the work 1 is directly charged in a high temp. liquid 3 from the air to heat and cure the paint 2 bonded to the work 1. Therefore, the paint 2 can be cured in a non-contact state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating magnetic cores and other parts.

[0002]

2. Description of the Related Art Conventionally, as a method of coating an insulating paint on a magnetic core, there has been a method shown in FIG. In this method, a large number of magnetic cores B are arranged on a corrugated plate A having irregularities,
The paint D is sprayed onto the cores B by the spray C, and the core B together with the corrugated plate A is put into a heating furnace to heat and cure the paint D, and then the corrugated plate A is taken out of the heating furnace and the core B is corrugated. A
It is a method in which the paint D is sprayed on the other side by turning it over and then putting it in a heating furnace together with the corrugated sheet A in a heating furnace as in the previous time. There is also another method shown in FIG. In this method, the magnetic core B is heated at high frequency, or is heated in a heating furnace or a drying furnace, and the core B is heated to
As shown in the figure, pin E is pinched, and in that state, paint D is attached to the same core B by electrostatic painting, spray painting, etc., and then pin E is pinched and placed in a drying oven to heat and cure paint D. Is.

[0003]

Among the conventional coating methods, in the former method, the coating has to be separately sprayed on the front and back surfaces of the core B, so that two coating steps are required and workability is poor. , It takes time to cure after painting. Further, in the latter method, the portion pinched by the pin E is not painted as shown in FIG. 3, and when the pin E is removed, a small hole is formed. Therefore, if it is left as it is, the portion will have poor insulation. Therefore, conventionally, the pin E is removed, and then the small hole is closed by manually painting the small hole with paint with a brush. For this reason, there is a drawback that it is very troublesome.

[0004]

OBJECTS OF THE INVENTION As a result of intensive studies on a conventional magnetic core coating method, the present inventor found that in a coating process such as spray coating or electrostatic coating on a magnetic core, a corrugated plate, a pin or the like that comes into contact with the magnetic core is It is intended to provide a method of coating a core without contacting it without using it at all.

[0005]

As shown in FIG. 1, a method of coating a magnetic core or the like of the present invention involves suspending a work 1 in the air and adhering a paint 2 to the work 1 during the suspension. 1 is directly put into the heated high temperature liquid 3 from the air, and the coating material 2 attached to the work 1 is heated and cured.

[0006]

In the coating method for the magnetic core of the present invention, the work 1
While the paint is floating in the air, the paint is attached to the paint, and the paint is put into the high-temperature liquid 3 and cured by heating. Therefore, the paint 2 is cured without contacting anything.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coating method for magnetic cores and the like according to the present invention will be described with reference to FIG. This is a magnetic core (work) 1
The work 1 is projected from the slope 5 into the air by rolling or sliding on the slope 5 of the base 4, and the paint 2 is attached to the work 1 while the work 1 is floating in the air. Then, the work 1 to which the paint 2 is attached is dropped as it is onto the heating oil 3, and the paint 2 is heated and cured by the high temperature liquid 3.

The work 1 shown in FIG. 1 is charged or heated in advance before free fall. Work 1
When the work 1 is floating, the paint is electrostatically adhered to the entire surface of the work 1 while the work 1 is floating. When the work 1 is heated, the paint is melted and adhered to the floating work 1. Also,
The method of attaching the paint to the floating work 1 may be other than these methods, for example, spraying may be performed. As the high temperature liquid 3, oil such as silicone oil or insulating oil, or chemical liquid is used. The temperature of the high-temperature liquid 3 varies depending on the type of paint, but is set to 200 ° C., for example. Work piece 1 dropped in high temperature liquid 3
Is pulled out of the oil tank 6 by, for example, a mesh-shaped conveyor 7 made of stainless steel or the like provided in the oil tank 6, many works 1 put in the high-temperature liquid 3 are transferred to the oil tank 6
It does not accumulate inside.

[0009]

EFFECTS OF THE INVENTION The coating method for magnetic cores and the like of the present invention has the following effects. ． Since the paint 2 is attached to the work 1 floating in the air, the paint 2 can be attached to the entire surface of the work 1 at a time, and the work efficiency is improved. ． Since the work 1 is not touched in the step of attaching the paint 2 to the core 1 and the heating step, the paint 2 can be evenly attached to the entire work 1. ． Since the coating material 2 is cured with the high temperature liquid 3, the coating material 2 is cured in a short time (several seconds) and the coating efficiency is improved. ． If insulating oil, silicone oil or the like is used for the high temperature liquid 3, the insulating property of the work 1 is further improved by the synergistic effect of the insulating properties of these oils and the insulating effect of the paint 2.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a coating method of the present invention.

FIG. 2 is an explanatory view showing an example of a conventional coating method.

FIG. 3 is an explanatory view showing another example of a conventional coating method.

[Explanation of symbols]

 1 Work 2 Paint 3 Liquid 4 Units 5 Slope 6 Oil Tank 7 Conveyor

Claims (1)

[Claims] 1. A work 1 is floated in the air, a paint 2 is adhered to the floating work 1, and the work 1 is directly put into the high temperature liquid 3 from the air and adhered to the work 1. A method for coating a magnetic core or the like, characterized in that the coating material 2 is cured by heating.