KR100382081B1 - Method of forming and it line post insulator - Google Patents

Abstract

The present invention is to produce a line post insulator in the order of coarse production → adhesion → curing → mold injection → injection using silicon, FRP, adhesive, it is possible to produce a product about 1/4 lighter than the conventional and simplify the molding process We propose a molding method for line post insulator that can be implemented.

Description

Forming method of line post insulator and line post insulator molded by the 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 and a line post insulator manufactured by the method capable of simplifying and miniaturizing the molding process, increasing the strength, 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 (linepost insulator wire fasteners) and publication Nos. 95-12504 (processed wire fasteners with corona suppression effect).

However, the above-mentioned conventional line post insulator has to go through about 25 steps in manufacturing, and in particular, in the process of attaching the insulation housing of the porcelain (super porcelain) and the metal brackets together, the attachment site is finished with cement malt. In order to maintain the strength, it has to go through 20 days or more of the underwater curing period has the disadvantage that the production cost increases and the production period is long. On the other hand, there has been a conventional outdoor high-strength insulator similar to the structure of the line post dedicated insulator of the present invention, the insulator is fixed to the upper and lower sides of the insulating housing and to form a glass fiber layer on the outer peripheral surface of the central core It has a rubberized structure on the outermost side. This makes it clear that the insulator of the present invention is not only in use, but also in a manufacturing method and a material used.

In addition, the conventional line post insulators are made of iron, porcelain, cement, glaze, etc., which are expensive in terms of price, have a heavy weight, and are easily broken even in a weak impact. In addition, because the thickness of the glaze is controlled to prevent long-term deterioration, it requires a skilled worker and has a disadvantage in that the working process is difficult.

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

Another object of the present invention is to provide a method capable of molding insulators having a light weight of about 1/4 compared to the conventional line post insulators and improving hardness and insulation.

The present invention for achieving the object as described above, the line post insulator is formed by using a primary mold for forming 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 In the method, casting the bracket having a threaded groove extending inwardly with a screw groove along the inner circumferential surface; and seated in the core forming groove of the primary mold, and then the fiber of the shape of the shape in the core forming groove Filling a mixture of glass and jelly resin and then compressing the mixture to make a core; applying an industrial adhesive to an outer circumferential surface of the core, and then placing it in a housing forming groove of the secondary mold. And forming a line post insulator by filling and injecting a silicone rubber into the housing molding groove. .

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: primary mold 14: lower support bracket

16: extension rod 18: core appearance

19: mixture 20: core

30: secondary mold 34: insulated housing 40: line post insulator

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying process diagrams and cross-sectional views. First, the concept of the molding method proposed by the present invention will be described. → Mold injection → Molding line post insulator in the order of injection, which can produce products that are about 1/4 lighter than the conventional one, and has superior strength and durability, and can simplify the molding process. I would like to suggest.

According to an embodiment of the present invention, the method of forming the line post insulator proposed above is as shown in FIGS. 1 and 2. 1 and 2, two molds are used to implement the molding method of the present invention, which is a primary mold 10 for molding the core 20 portion of the line post insulator 40. And a secondary mold 30 for molding the insulating housing 34 in which disk-shaped wing portions 34a are formed along the outer circumferential surface of the core 20.

That is, as shown in FIGS. 1A and 1D, the primary mold 10 is provided with a core groove 12 for seating an electric wire and a core forming groove 12 for forming a cylindrical core 20. In addition, a housing forming groove 32 in which a core is inserted into the secondary mold 30 and a protruding groove 32a for forming an insulating housing 34 having disc shaped wing portions 34a at both ends thereof is formed. Is formed. At this time, the protruding portion 32a is provided to form the wing portion 34a of the above-described insulating housing 34.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments of the present invention, but the present invention is not limited to the embodiments.

{Example 1}

The lower supporter 14 is cast of iron to form a rod-type protrusion rod 14a extending inwardly with a screw groove in the center of the inner circumferential surface thereof, and then a fiber-reinforced plastic fiber to the protrusion rod 14a. The extension rods 16 made of plastic (hereinafter referred to as "FRP") material were adhesively fixed. In this case, the protruding rod 14a and the extension rod 16 may be combined in a fitting manner, and may be cast by extending the protruding rod 14a made of iron to the extension rod.

Next, as shown in FIG. 1B, the lower support bracket 14 described above is introduced into the core forming groove 12 of the primary mold 10 which is heated by the built-in electric heater, and then the core forming groove. (12) Jelly-type mixtures made of finely divided pieces of fiber glass and jelly-like epoxy resins or of finely divided pieces of fiberglass and jelly-like pieces of polyester resin (18 ) Was filled, and then molded under pressure to form the core 20 shown in FIG. 1C. At this time, the mixing ratio (weight ratio) of the fiber glass 촙 and the resin (epoxy, polyester) is most preferably mixed in a ratio of 7: 3 or 5: 5, and the strength and insulation properties are the best under the mixing ratio. Because. And heating the mold as described above is to increase the moldability, the moldability is much increased compared to cold work. On the other hand, when the lower support sphere 14 is inserted into the core forming groove 12, a general industrial adhesive may be applied to the entire surface of the metal fitting 14 and then introduced into the forming groove 12. This is because the application of the metal mold 14 and the gel-type mixture can further increase the fixing force. [0056] After that, as shown in FIG. 1E, the core 20 is formed in the housing of the secondary mold 30. After seating on (32), a silicone rubber was injection molded into the housing forming groove 32 to form a line post insulator 40 shown in FIG. 1F.

On the other hand, the line post insulator 40 formed by the above-described method has an extension rod 16 made of FRP material at the center as shown in FIG. 18) is formed, and on the outer circumferential surface of the mixture 18, an insulating housing 34 is formed of silicon rubber. At this time, the thickness of the insulating housing 34 is preferably about 3 to 10mm, and the distance between the wing portions 34a of the above-described insulating housing 34 is most preferably about 5mm.

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 / 4 It has the advantage of being light and compact.

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 produce a low-cost line post insulator.

Claims (7)

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 bracket to form a rod portion extending inwardly with a screw groove along an inner circumferential surface; Placing the bracket on the core forming groove of the primary mold, and filling the core forming groove with a mixture of fiberglass and jelly resin in the form of 촙, and compressing the same to form a core; After coating the industrial adhesive on the outer peripheral surface of the core, and then seated in 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 Forming method of the line post insulator. (delete) (delete) (delete) The method of claim 1, wherein the resin is epoxy or polyester. The method of claim 5, wherein the fiber glass and the resin are mixed in a weight ratio of 7: 3 or 5: 5. A line post insulator formed by the method of any one of claims 1 to 5.