JPS6127615A - Insulation mold potting method for insulating transformer - Google Patents

Abstract

PURPOSE:To enable to perform a potting using a small quantity of potting material in one process by a method wherein the terminal part of a high-tension insulating transformer is masked. CONSTITUTION:The hardened material of silicon rubber 5 is filled as the masking material to be used on the inner side of a high-tension insulating coil 4, a double-sided adhesive tape 6 is adhered to the outer circumference of the high- tension insulating coil 4, and a rubber sheet 7 of the same thickness as the thickness component to be molded from a terminal part is adhered on the tape 6. A double-sided adhesive tape 6 is adhered thereon again, and a polyester sheet 8 of the width a little wider than the height to be molded at the terminal part is wound on the tape 6 as the outermost circumferential layer. Rubber compound 9 of high viscosity and normal temperature hardening is thinly coated on the overlapped part of the polyester sheet 8 located on the outermost circumference. After the rubber compound 9 is hardened, an evacuated potting material 2 is poured into the terminal part. Then, after said potting material is hardened, the polyester 8, the rubber sheet 7, the double-sided adhesive tape 6 and the hardened material 5 of silicon rubber are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a potting method for insulating-molding a terminal portion of a high-voltage insulation transformer or the like.

[Prior art]

Conventionally, the method shown in FIG. 1 has been used to pot the terminals of this type of high-voltage isolation transformer. In FIG. 1, (1) is a high-voltage isolation transformer, (21) is a potting material for insulating molding to the terminal #(la) of this high-voltage isolation transformer Ill, and (3) is a case in which the above-mentioned potting material (21) is placed.

Next, this work process will be explained. After assembling the high voltage insulating transformer to shown in Fig. 1 tal, put the potting material (2) into the case (3) shown in Fig. 1 tb+, and after completing evacuation, place the potting material (2) in the case I31 as shown in Fig. 1 + ol. Dip the high-voltage insulation transformer's terminal part (1a) upside down inside the container, and then vacuum it again.
31 Remove the high voltage insulation transformer (mouth) from the inner blade and harden it upside down.

(By turning it upside down, the potting material (21) will appear like an icicle at the terminal part (la). Repeat this process 3 to 4 times. What's more, the terminal part (la) is quite thick. When necessary, the number of repetitions increases.

Since the conventional potting method for the terminal section (la) of the axial voltage insulation transformer IIJ is configured as described above, the same work has to be repeated many times, and the amount of time required for one work process is In addition, since the potting material (2) adheres to areas where it should not be removed, the amount of electricity in the high-voltage insulating transformer ILL increases, and the amount of potting material +21 used increases.

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and by masking the terminals of the high-voltage insulating transformer, a potting method that can be reliably performed in one step and with a small amount of potting material has been developed. This is what we provide.

[Embodiments of the invention]

Hereinafter, one embodiment of this invention will be explained with reference to the figures.
In the figure, (4) is the shoko fIA edge coil, (5) is the cured silicone rubber that masks the inside of this high-voltage insulated coil (4), and 16) is the outside of the high-voltage insulated coil (4).
k Masking rubber sheet (7) and polyester sheet) (Double-sided adhesive tape for fixing to 81', (
9) is a rubber backing applied to the overlapped portion of the polyester sheets (8).

Next, the working method will be explained. As a masking material inside the high-voltage insulated coil (4) shown in Fig. 8 (&), a cured product of silicone rubber (5) is packed slightly tightly.
Attach double-sided adhesive tape (6) to the outer circumference of the high voltage insulated coil (4) by the distance you want to mold from the terminal part. On top of that, apply a rubber band of the same thickness as the thickness you want to mold from the terminal part. Paste the double-sided adhesive tape (6) on the rubber sheet (7) again.
On top of that is a polyester sheet as the outermost circumference) +81 t
-4 Wrap it around the child to the desired height and a slightly larger width.

On the overlapping part of the outermost polyester sheets (8), a thin layer of rubber Bakundo (9), which cures at room temperature and has high viscosity, is applied. After curing the rubber pakundo (9), pour the vacuumed potting material (2) into the terminal area, and after curing, apply the polyester sheet (8), rubber seam (7)% double-sided adhesive tape (6), silicone rubber compound (5). ), and the result is as shown in FIG. 2 101.

In addition, in the above embodiment, the masking method when potting the terminal part of the high voltage insulated coil (4) was explained, but as a substitute material for the polyester sheet (8) and the rubber sheet (7), flexible If the adhesion to the double-sided adhesive tape (6) is good, the same effects as in the above embodiments can be achieved.

[Effects of the Invention] As described above, according to the present invention, high pressure P! By masking the desired distance around the terminal of the N coil, the amount of potting material used can be significantly reduced and the cost can be reduced, and the process can be performed only once. Therefore, it has the effect of obtaining highly accurate products.

[Brief explanation of drawings]

Figure 1 is a diagram showing the potting process for the terminals of a conventional high-voltage isolation transformer. 101 is a side view of a case in which a high voltage insulating transformer is immersed in the case and vacuum is being drawn. FIG. 168 is a three-dimensional view of a case for vacuuming by itself. It is a process diagram showing an insulation mold botch ink method for an insulation transformer,
Fig. 8 (&1 is a top view with masking around the terminal part of the high voltage insulator coil, Fig. 8 (1) I is a side view of Fig. 2 (&1), Fig. 8 101 is a top view of the terminal S of the high voltage insulated coil. This is a side view with the masking material removed after pouring the potting material into and curing it. In the figure, 1 is the high voltage insulation transformer, (la) is the terminal part, and
)i! rubber sea) i8) d polyester sheet,
(lO) is the potting material. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a potting method for insulating-molding a terminal portion of a high-voltage insulation transformer, a step of raising a sheet member from an outer wall of the transformer body and winding the sheet member so as to surround the terminal portion at a predetermined distance, and the terminal portion surrounded by the sheet member; An insulation mold potting method for an insulation transformer, comprising the steps of filling a region with a molding material (potting material), and removing the sheet member after the molding material has hardened.