JPH0574253A - Metal mold for composite insulator - Google Patents

Abstract

PURPOSE:To provide a metal mold for a composite insulator of which manufacturing cost is low and which can be post-processed easily. CONSTITUTION:For a metal mold for a composite insulator vertically split along the center line for molding a jacket 3 and a plural swollen parts 4 such as a shed, pleats, at an insulation core 1, it is laterally split at every swollen part 4 to form lateral split molds 10, and the lateral split molds are put on each other in multiple stages. Otherwise, in the metal mold for the composite insulator vertically split along the centerline for molding the jacket and swollen parts such as the shed part and pleats at the insulation core, a lower mold for forming a lower surface of the swollen part 4 and an upper mold for forming an upper surface of the swollen part 4 are combined with each other to form the molds for the swollen part 4, and a surface of the swollen part 4 from the outer circumference down is set to be a part of a joint surface 15 of the lower mold with the upper mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for a composite insulator composed of a plurality of materials used as an insulator for power equipment such as a transformer, a circuit breaker, a gas insulated switchgear, a transformer and a transmission line.

[0002]

2. Description of the Related Art In a conventional composite insulator of this type, as shown in FIG. 6, metal flanges 2 are fixed to both ends of an insulating core 1 of FRP or the like, and an outer cover 3 and a cap, pleats or the like are attached to the core 1. An insulator 5 composed of the bulging portion 4 is attached.

When manufacturing this composite insulator, as shown in FIG. 7, with the flanges 2 fixed to both ends of the core 1, a vertically divided die 6 is covered and pressure injection is performed. The molding material 8 is injected under pressure from the device 7 into the mold 6 to mold the insulator 5.

[0004]

The conventional mold 6 is
There is a problem in that each mold is required for the change in the number of the bulging portions 4 and the change in the interval between the adjacent bulging portions, which is expensive. Further, it is necessary to form the bulging portion 4 for securing the leak length of the insulator surface, that is, the extended surface length, and it is necessary to form a deep depression or groove in the circumference, especially in the case of a shade, it is thin. Since the protrusion is large, it takes a long time to process a special machine tool such as a die-cutting machine or an electric discharge machine, and it is expensive, and it takes time to clean the mold, maintain it, and finish the flash. There is a problem. The present invention has been made in view of the above points, and an object of the present invention is to provide a composite insulator molding die which is inexpensive to manufacture and easy to post-process.

[0005]

In order to solve the above-mentioned problems, according to the present invention, an insulating core is longitudinally divided along a centerline for molding a bulging portion such as a cap and a plurality of shades and folds. In a composite insulator molding die, a laterally-divided mold is formed by laterally dividing each bulging portion, and the laterally-divided dies are stacked in multiple stages. In addition, the present invention is a molding die of a composite insulator vertically divided along a center line for molding a bulging portion such as an outer skin and a shade or fold on an insulating core, and a lower mold forming a lower surface of the bulging portion. And the upper die forming the upper surface of the bulging portion are superposed to form a die of the bulging portion, and the surface from the outer periphery of the bulging portion to the lower side is one of the joint surfaces of the lower die and the upper die. It is a part.

[0006]

In the molding die of the composite insulator of the present invention having the above-described structure, the laterally dividing mold is formed by laterally dividing each bulging portion. Can be dealt with by increasing or decreasing the number of horizontal split molds and stacking them in multiple stages.Also, in order to change the interval between adjacent bulging parts, a spacer is interposed between the adjacent horizontal split molds. Can handle.

Further, according to the present invention, the lower die forming the lower surface of the bulging portion and the upper die forming the upper surface of the bulging portion are polymerized to form the die of the bulging portion. There is no need to form deep dents or grooves, no special machine tools are required, molds can be easily manufactured, and cleaning and maintenance are easy. Furthermore, since the surface from the outer periphery of the bulging part to the lower part is part of the joint surface between the lower mold and the upper mold, even if burrs remain, the drainage of rainwater does not get worse and the finishing of burrs is easy. Can be

[0008]

EXAMPLES Examples will be described with reference to FIGS. 1 to 5. 6 and 7, the same reference numerals indicate the same or corresponding parts. First, in FIG. 1 showing one embodiment, numeral 9 is a mold, and like the mold 6 of FIG. 7, an outer cover 3 and a plurality of bulges 4 such as shades and folds are molded on an insulating core 1. It is a mold and is vertically divided into two along the center line. Reference numeral 10 denotes a laterally dividing mold which is laterally divided to form a mold for each of the bulging portions 4.
An upper die that forms the upper surface of the bulging portion 4 is formed on the upper surface of the, and a lower die that forms the lower surface of the bulge portion 4 is formed on the lower surface of the horizontal split die 10. A mold for the projecting portion 4 is formed. The composite insulator manufactured in the illustrated state is used upside down, that is, with the lower side facing up and the upper side facing down.

Reference numeral 11 denotes a lowermost layer type, the upper die is formed on the upper surface, and a lower opening 12 is formed. 13 is the uppermost layer type, the lower die is formed on the lower surface, and the upper opening 14
Are formed.

Reference numeral 15 denotes a short vertical joining surface, which is downward from the outer peripheries of the upper die and the lower die forming the bulging portion 4 of the horizontal split die 10.
In the figure, it is an upward surface, and is a part of the joining surface of the adjacent horizontal split molds 10. Reference numeral 16 denotes a long horizontal joint surface, which is a surface formed in the horizontal direction from the end of the vertical joint surface, and is a main joint surface of the adjacent horizontal split molds 10. 17 is a knock pin, which ensures the multi-stage stacking of each horizontal split type 10,
Used to prevent mold deviation.

When the mold 9 is manufactured, it is vertically divided into two, and each of the laterally divided mold 10, the lowermost layer mold 11 and the uppermost layer mold 13 which are laterally divided is individually manufactured. Are stacked in multiple stages and assembled by bolts, etc., then the molds on both sides are combined and the mold 9 is assembled by bolts. Next, at the time of molding, an injection pipe 19 is joined to the lower opening 12 from the stock container 18 of the molding material 8 to perform casting.

Burrs are generated by the vertical joint surface 15 from the outer circumference of the bulging portion 4 molded by the mold 9, and the burrs are directed downward from the outer circumference of the bulging portion 4 when the insulator is used. Therefore, it is not necessary to use the nerve to the left for removing burrs, and the finishing of burrs is simplified. If burrs are generated in the upward or horizontal direction from the outer periphery of the bulging portion 4,
Due to the remaining burrs, rainwater drainage becomes worse, and a long time is required for the burrs treatment work.

Next, in FIG. 2, the number of the bulging portions 4 is 3 in FIG.
This is a case where the number is increased to four with respect to the number of pieces, and this is dealt with by adding the horizontal split mold 10. Next, FIG. 3 shows a case where the interval between the adjacent bulging portions 4 is increased. In this case, a spacer 20 is interposed between the upper and lower horizontal split molds 10.
In the illustrated state, the spacer 20 has a mold for the upper surface of the bulging portion 4 formed on the upper surface and a mold for the lower surface of the bulging portion 4 on the lower surface.

Next, FIGS. 4 and 5 show a case where the work for removing the flash is not considered. However, also in these cases, it is possible to cope with the increase and decrease in the number of the bulging portions 3 and the change in the interval between the bulging portions 4 and to easily form the mold.

[0015]

Since the present invention is configured as described above, it has the following effects. Since the laterally dividing mold 10 is formed by laterally dividing each of the bulging portions 4, the number of laterally dividing dies 10 should be increased or decreased and stacked in multiple stages when the number of the bulging portions 4 is increased or decreased. Can be dealt with, and a change in the interval between the adjacent bulging portions 4 can be dealt with by interposing the spacer 20 between the adjacent lateral split molds 10.
It will be extremely cheap.

Also, a lower mold forming the lower surface of the bulging portion 4,
Since the upper die forming the upper surface of the bulging portion 4 is overlapped with the upper die to form the die of the bulging portion 4, it is not necessary to form a deep recess or groove as in the conventional case, and a special machine tool is not required. The mold can be easily manufactured, and cleaning and maintenance are easy. further,
Since the downward surface from the outer periphery of the bulging portion 4 is a part of the joint surface 15 between the lower die and the upper die, even if burrs remain, the drainage of rainwater does not deteriorate and the finishing of burrs is easy. Can be

[Brief description of drawings]

FIG. 1 is a cut front view of an embodiment of a molding die for a composite insulator of the present invention.

FIG. 2 is a cutaway front view of another embodiment.

FIG. 3 is a cut front view of still another embodiment.

FIG. 4 is a cut front view of another embodiment.

FIG. 5 is a cut front view of still another embodiment.

FIG. 6 is a cut-away front view of a composite insulator.

FIG. 7 is a cut front view of a conventional mold.

[Explanation of symbols]

 1 core 3 outer skin 4 bulge 9 mold 10 lateral split 15 joint surface

Claims (2)

[Claims] 1. A composite insulator molding die vertically divided along a center line for molding an outer cover and a plurality of bulging portions such as shades and folds on an insulating core, and laterally dividing each bulging portion. To form a laterally divided mold, and a mold for molding a composite insulator formed by stacking the laterally divided molds in multiple stages. 2. A molding die for a composite insulator vertically divided along a center line for molding a bulging portion such as an outer skin and a shade or fold on an insulating core. A lower die for forming a lower surface of the bulging portion. And an upper die forming an upper surface of the bulging portion are polymerized to form a die of the bulging portion, and a surface from the outer periphery of the bulging portion to a lower side is the lower die and the upper die. Molding die for composite insulator as part of the joint surface of.