KR20020027891A - Method of forming and it line post insulator - Google Patents

Abstract

PURPOSE: A line post insulator and a molding method thereof are provided to increase the durability of the line post insulator by molding the line post insulator with the injection molding method. CONSTITUTION: A first die molds a core unit of the line post insulator(40). A second die molds an insulation housing along an outer circumference of the core. A lower supporting unit(14) is molded, which forms an elongated rod unit with a thread groove provided along an inner circumference of the core. The lower supporting unit is inserted into a core molding groove of the first die. The core molding groove is filled with a mixture(18). The mixture(18) is compressed to become the core. An adhesive is coated on the outer circumference of the core and the core is inserted into a housing mold groove of the second die. A silicon rubber is filled with the housing mold groove and injected to become the line post insulator(40).

Description

Line Post Insulator and Forming Method {METHOD OF FORMING AND IT LINE POST INSULATOR}

The present invention relates to a line post insulator, and more particularly, to a line post insulator forming method capable of simplifying the molding process and mass production.

Typically, the high-voltage cable is wired to be supported by the insulator mechanism, which is built on the forehead of each pole built at a certain height from the ground, and the connecting end of the high-voltage wire that is wired is mounted on the end of the pole. It is fixedly installed to be separated from each other by human clamps, and each human clamp is connected to each other by wiring a separate connection wire. In addition, the wires wired between the human clamps are firmly fixed by a binding member such as a coated wire so that one point is supported so as not to be sag by the line post insulator, which is an insulator fixed on the wrist.

Meanwhile, in the foregoing description, since the line post insulator according to the present invention is a well-known technique, a detailed description thereof will be omitted, and additionally, the line post insulator is disclosed in Korean Utility Model Publication No. 94-. 27509 (line post insulator wire fasteners) and publication Nos. 95-12504 (processed wire fasteners with corona suppression effect).

However, such a line post insulator must go through about 25 steps, and in particular, in the process of attaching the insulating housing of the enamel and the metal bracket to each other, after finishing the attachment site with cement malt, the attachment site can maintain the strength again. Since it has to go through the curing period of 20 days or more, the manufacturing cost increases and the production period is long.

In addition, the above-described line post insulators are made of iron, porcelain, cement, glaze, etc., which are not only expensive in terms of price but also have a heavy weight and are easily broken even in a weak impact.

In addition, the line post insulator requires a skilled worker and also has a disadvantage in that the working process is difficult because it controls the thickness of the glaze to prevent deterioration of the long term.

Accordingly, an object of the present invention for solving the above problems is to simplify the molding process of the line post insulator.

Another object of the present invention is to provide a method that can form a 1/4 lighter insulator compared to the conventional line post insulator.

Still another object of the present invention is to provide a method for forming a low cost line post insulator.

The present invention according to the first aspect for achieving the above object is a process of having a primary mold for molding the core portion of the line post insulator, and a secondary mold for forming the insulating housing along the outer peripheral surface of the core portion and; Casting a lower supporter forming a rod portion extending upward with a screw groove along an inner circumferential surface; Inserting the lower supporter into the core molding groove of the primary mold, filling the core molding groove with a mixture of fiberglass and resin, and compressing it to make a core; After the adhesive is applied along the outer circumferential surface of the core, and then put it into the housing forming groove of the secondary mold, the line post consisting of filling the silicone rubber in the housing forming groove, injection molding the line post insulator We propose molding method of insulator.

1A to 1F are views illustrating a process of injection molding a line post insulator according to an exemplary embodiment of the present invention.

2 is a cross-sectional view of a line post insulator made by the molding method of FIG.

<Description of the symbols for the main parts of the drawings>

10: 1st mold 14: Lower support strip

16: extension rod 18: mixture

20: core 30: secondary mold

34: insulated housing 40: linepost insulator

Hereinafter, with reference to the accompanying drawings and the accompanying drawings a preferred embodiment according to the present invention will be described in detail. It should also be noted that in the following description, only parts necessary for understanding the molding method of the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention. Terms to be described later are defined in consideration of functions in the present invention, which may vary according to intention or custom of a user or a manufacturer, and the definitions should be made based on the contents throughout the present specification.

First, the concept of the molding method to be proposed in the present invention, by forming a line post insulator in the order of coacher → adhesive → curing → mold injection → injection using silicon, FRP, adhesive, about 1/4 lighter than conventional It is to propose a method of forming a line post insulator that can produce a product and can simplify the molding process.

According to an embodiment of the present invention, the method of forming the line post insulator proposed above is as shown in FIG. 1. Referring to FIG. 1, the present invention forms a line post insulator using a primary mold for forming a core portion of a line post insulator and a secondary mold for forming a disk-shaped insulating housing along an outer circumferential surface of the core. Done.

That is, as shown in FIGS. 1A and 1D, the primary mold 10 has a lead groove for seating an electric wire and a core forming groove 12 for forming a cylindrical core, and a secondary mold ( A housing forming groove 32 is formed in which the core is inserted and protruding grooves for forming the disc-shaped insulating housing 34 are formed at both ends thereof.

Hereinafter, the present invention will be described in detail based on the preferred embodiment of the present invention, but the present invention is not limited to the embodiment.

{Example 1}

The lower peripheral hole 14 is cast of iron to form a rod-type protrusion bar 14a at the top of the inner circumferential surface center, and a fiber-reinforced plastic on the protrusion bar 14a: An extension rod 16 made of a " FRP " In this case, the protruding rod 14a and the extension rod 16 may be combined in a fitting manner, and may also be cast by extending the protruding rod 14a made of steel to the extension rod.

Next, as shown in FIG. 1B, the lower supporter 14 described above is introduced into the core forming groove 12 of the primary mold 10, and then the fiber glass is inserted into the core forming groove 12. And a mixture 18 mixed with epoxy or fiberglass and polyester, and then compressed to form a core 20 shown in Figure 1c. At this time, the mixing ratio of fiberglass and epoxy (polyester) is most preferably mixed at a ratio of 7: 3 or 5: 5. In the meantime, when the lower supporter 14 is inserted into the core forming groove 12, an adhesive may be applied to the entire surface of the metal fitting 14 and then introduced into the forming groove 12.

Thereafter, as shown in FIG. 1E, the core 20 is injected into the housing forming groove 32 of the secondary mold 30, and then the silicone rubber is filled into the housing forming groove 32, and then injected. By molding, the line post insulator 40 shown in FIG. 1F was formed.

Meanwhile, the linepost insulator 40 formed by the above-described method has an extension rod 16 made of FRP material at the center as shown in FIG. 2, and a mixture 18 of fiberglass and resin is formed on the outer peripheral surface thereof. On the outer circumferential surface of the mixture 18, an insulating housing 34 is formed of silicon rubber. In this case, the thickness of the insulating housing 34 is preferably about 3 to 10 mm, and the distance between the insulating housings 34 described above is most preferably about 5 mm.

As described above, the present invention can realize a simple molding process and a reduction in manufacturing cost by molding the line post insulator in about 5 steps, and is also made of silicon and FRP material so that it is 1 / It has 4 light weight advantages.

In addition, the present invention is an injection molding method by molding the line post insulator is not easily damaged by external impact, there is an increased effect that can form a low-cost line post insulator.

Claims (6)

In the method of forming a line post insulator by using a primary mold for forming the core portion of the line post insulator, and a secondary mold for forming an insulating housing along the outer peripheral surface of the core portion, Casting a lower supporter forming a rod portion extending upward with a screw groove along an inner circumferential surface; Inserting the lower supporter into the core molding groove of the primary mold, filling the core molding groove with a mixture of fiberglass and resin, and compressing it to make a core; After applying the adhesive along the outer circumferential surface of the core, and then put it into the housing forming groove of the secondary mold, and filling the silicone rubber in the housing forming groove, and injection molding the line post insulator Line post insulator molding method. The method of claim 1, wherein the rod portion is formed of a fiber reinforced plastic material. The method of forming a line post insulator according to claim 1, wherein an adhesive is applied to the entire surface of the lower supporter and then injected into the core forming groove. The method of claim 1, wherein the resin is epoxy or polyester. The method of forming a line post insulator according to claim 1 or 4, wherein the fiberglass and the resin are mixed in a ratio of 7 to 5: 3 to 5. Line post insulator molded by the method of claim 1.