JPS5895808A - Processing method of impregnation of coil wound in arrangement with dripping varnish - Google Patents

Abstract

PURPOSE:To enable the prevention of ununiform coating and sticking of varnish to an unrequired part and to put to practical use continuous mass processing by dripping impregnation, by dripping insulation vernish onto a coil being made rotated of itself, and by dispersing the varnish by a means or mechanism for dispersing the varnish so that the coil is impregnated therewith. CONSTITUTION:According to a processing method of dripping impregnation, varnish 3 dripping down from a dripping nozzle 1 is dispersed uniformly throughout the whole surface of a coil by a brush 2, as shown in Figure A. In this case, the brush 2 has a mechanism which operates vertically with the movement of the coil, while contacting the coil, or it is devised not to hinder the movement of the coil by means of a spring mechanism. In the case when thick coating is made additionally after uniform dispersion and impregnation are made, varnish is further dripped as shown in Figure B after the processing shown in Fig. A is completed. As to a brush employed, the quality and shape thereof can be selected appropriately according to the shape of an article to be processed and the kind of varnish.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of dropping an insulating varnish and impregnating it evenly onto an array-wound coil.

Insulating varnish treatment methods for insulation treatment can be roughly divided into two types: impregnation treatment (dip) and drip impregnation treatment (drip). When applying insulating varnish to aligned wound coils (bobbin-wound coils, lamp coils, ignition-sub-coils, etc.), varnish may adhere to unnecessary areas or make it impossible to coat the coil surface uniformly and thickly with dipping. There are drawbacks. Also, in drip impregnation, the coil winding direction and the coil rotation direction are the same.

There are disadvantages such as the varnish dropped onto the coil is not dispersed on the coil surface and falls from the place where it was dropped (Fig. 1). Conventionally, in order to uniformly coat the coil surface, taping on the coil and dipping with low viscosity varnish have been adopted.

In view of the above circumstances, the inventor of the present invention has conducted various studies on an impregnation treatment method that does not require complicated means and uses a varnish of normal viscosity to coat the coil surface evenly, and has developed a two-drop impregnation force method. By adopting a means or mechanism for dispersing two drops of varnish, uniform coating on the coil can be achieved and the present invention has been achieved. That is, the present invention is a festival drop impregnation treatment method in which insulating varnish is dropped onto the coil while the coil rotates, and the varnish is dispersed and impregnated using a varnish dispersion means or mechanism.

The present invention will be explained using figures.

Figure '1 shows that in the conventional varnish dripping impregnation treatment method, the varnish dropped on the bobbin-wound coil is only impregnated with the varnish in and around the area where the varnish was dropped, and furthermore, as the coil rotates, the varnish spreads from the coil surface. falls.

On the other hand, in the drip impregnation treatment method of the present invention for dispersing dropped varnish, the varnish 3 dropped from the two-drop nozzle 1 is uniformly dispersed over the entire coil surface by the brush 2, as shown in FIG. 2A.

In this case, the brush 2 either has a mechanism that moves up and down as the coil moves while contacting the coil, or has a spring mechanism that does not hinder the movement of the coil.

As the means or mechanism for dispersing the varnish, any means or mechanism other than the brush in this example can be used as long as it can disperse the varnish while dropping it as described above, but a brush is the most suitable from the viewpoint of convenience. be.

If a thick coating is to be applied after uniformly dispersing and impregnating, the varnish may be added dropwise after the step in FIG. 2A, as shown in FIG. 2B.

When using a brush, the material and shape of the brush can be appropriately selected depending on the shape of the object to be treated and the type of varnish.

By employing the method of the present invention, the object to be treated is not limited to aligned wound coils, but can be applied to any object that can be impregnated with varnish dropwise while rotating, such as the stator and rotor of two-rotation electric equipment.

According to the method of the present invention, the varnish dropped directly onto the coil can be dispersed in the lateral direction, making it possible to prevent unnecessary coating and varnish from adhering to unnecessary areas.

Continuous large-scale processing using drip impregnation will become practical.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the state of the conventional varnish dripping impregnation treatment method, and Fig. 2 is a sectional view showing the state of the varnish dripping impregnation treatment method of the present invention. B shows a state in which two drops of varnish are uniformly dispersed in the lateral direction when thicker coating is required after A. l...Varnish dripping nozzle 2...Brush for dispersion 8...Varnish 4...Varnish attached even thicker 5...
...Bobbin winding coil Fig. 1 Fig. 2 A 13

Claims (2)

[Claims] (1) Drop varnish impregnation in which an insulating varnish is dripped onto the coil while the coil is rotated on its own axis, and the varnish is dispersed and impregnated using a means or mechanism for dispersing the varnish. Processing method (2) The varnish dripping impregnation treatment method according to claim (1), wherein the means or mechanism for dispersing the varnish is a brush.