JPH1092245A - Composite insulating tube molding mold, composite insulating tube molding mold device, and composite insulating tube molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily release a composite insulating tube from a mold when the composite insulating tube is molded with the mold. SOLUTION: In a composite insulating tube molding mold comprising a pair of mold units 1-1, 1-2, a covering forming recess 2 for forming a housing comprising a hood and a sheath in the outer circumference of a hollow core member 3 is arranged in each of the mold units 1-1, 1-2, the hollow core member 3 is arranged within the composite insulating tube molding mold, and after the mold is fastened, a covering forming material is filled in a housing forming space around the hollow core member 3, then the mold is heated to the prescribed covering forming material curing temperature to cure the covering forming material. An ejector means 1 for helping the release of a composite insulating tube molded from the mold is arranged. The ejector means 1 comprises a gas flow path which opens at one end in the recess 2, a valve mechanism which closes the opening of the ejector means 1 in molding and opens the opening in releasing to communicate the recess 2 and the gas flow path, and a gas supply means which supplies gas to the recess 2 through the gas flow path.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for forming a composite insulator,
The present invention relates to a mold apparatus for forming a composite insulator tube and a method for forming a composite insulator tube. Here, the composite insulator has a hollow core member made of fiber reinforced plastic and a jacket formed of an insulating polymer material on the outer peripheral surface of the hollow core member. Generally, the jacket is
The hollow core member includes a cylindrical sheath extending along the outer peripheral surface of the hollow core and a plurality of caps spaced apart in the axial direction and formed radially outward from the sheath. As the insulating polymer material, for example, silicone rubber, ethylene-propylene copolymer (EPDM), ethylene-propylene diene copolymer (EPDM) and the like are used. The composite insulator referred to in the present application includes a composite insulator having a straight cylindrical shape and a tapered shape.

[0002]

2. Description of the Related Art Conventionally, when forming a composite insulator using a composite insulator molding die, a hollow core member is placed in a mold, clamped, and then surrounded by a primer coated in advance around the hollow core member. Filling the jacket forming recesses with the jacket forming material, raising the temperature of the mold to a predetermined jacket forming material curing temperature, and holding the temperature at this temperature for a predetermined time, thereby curing the jacket forming material. The core material was bonded to the jacket material.

[0003]

SUMMARY OF THE INVENTION The present inventors have found that in the release step, the adhesion between the jacket and the core member is not destroyed, and the jacket cap is left in the jacket forming recess, so that the outer layer is not removed. Take sufficient time in the mold before release so that the jacket does not tear, and perform sufficient bonding between the jacket and the core member, and be careful enough not to tear the formed jacket. Had to be released. The present inventor has been studying a molding method using a conventional composite insulator molding die in order to improve the mold release workability without breaking the adhesion between the jacket and the core member in the mold release process. In, the bonding time between the jacket and the core member in the mold before release may be set to a shorter time as compared with the related art,
Also, in the mold release process, the composite insulator tube can be easily released from the molding die without tearing etc. without breaking the adhesion between the jacket and the core member without requiring a high level of skill. The present inventors have found a mold for forming a composite insulator, a mold apparatus for forming a composite insulator, and a method for forming a composite insulator, and have completed the present invention.

[0004]

SUMMARY OF THE INVENTION A composite insulator molding die according to the present invention is a composite insulator molding die comprising a pair of mold units, each of which has a cap portion and a sheath. The outer core of the hollow core member is provided with a sheath forming recess for forming the outer shell, and the hollow core member is disposed in the composite insulator forming mold, and after the mold is clamped, the periphery of the hollow core member is formed. A composite insulator mold in which a jacket-forming material is filled in a jacket-forming gap and the mold is heated to a predetermined jacket-forming material curing temperature to cure the jacket-forming material. Ejector means is provided to help the insulator tube to be released from the mold. The ejector means is provided with a gas passage opening at one end in the outer cover forming recess, and an opening of the ejector means is closed at the time of molding and closed at the time of mold release. Opening recess and gas passage Preparative to a valve mechanism in communication, characterized by comprising a gas supply means for supplying gas into the envelope formed gaps through the gas passage.

[0005] Further, a composite insulator forming apparatus according to the present invention comprises a composite insulator forming die comprising a pair of mold units, means for heating the composite insulator forming die, and a sheath forming material. A composite porcelain tube forming mold device comprising a supply unit and a unit for opening and closing a pair of mold units,
Each of the mold units is provided with a jacket forming recess for forming a jacket comprising a cap portion and a sheath portion on the outer periphery of the hollow core member, and the hollow core member is arranged in a composite insulator molding die. After the mold has been clamped, the molding material is filled in the coating material forming space around the hollow core member, and the mold is heated to a predetermined coating material curing temperature to cure the coating material. An insulator mold apparatus, comprising: ejector means for assisting the molded composite insulator to be released from the mold, the ejector means comprising a gas passage opening at one end in the jacket-forming recess, and an ejector means. A valve mechanism for closing the opening of the means at the time of molding and opening the mold at the time of releasing the mold, and communicating the gas passage with the jacket-forming recess, and gas supply means for supplying gas into the jacket-forming recess via the gas passage. It is characterized by.

Further, the method for forming a composite insulator tube according to the present invention provides a composite insulator molding die comprising a pair of mold units, wherein each of the mold units is provided with a jacket comprising a cap portion and a sheath portion. A hollow forming member is formed on the outer periphery of the hollow core member. The hollow core member is arranged in the composite insulator forming mold, and after the mold is clamped, the outer shell forming recess is formed around the hollow core member. A method for forming a composite insulator tube in which a material is filled and a mold is heated to a predetermined temperature for curing the material for forming the outer cover, thereby hardening the outer cover material. Gas is supplied to the interface between the outer jacket and the outer surface of the outer jacket to assist the composite insulator in releasing from the mold.

According to the composite insulator molding die, the composite insulator molding apparatus and the composite insulator molding method of the present invention, the hollow core member is arranged in the composite insulator molding die, and after the mold is clamped, the hollow core member is closed. After filling the jacket forming material around the core member with the jacket forming material and heating the mold to a predetermined jacket forming material curing temperature to cure the jacket forming material, the gas is removed at the time of mold release. By supplying gas to the interface between the inner wall of the formed recess and the outer surface of the formed outer cover, the outer cover surface is separated from the inner surface of the outer formed recess of the mold unit, and a gap is formed between the two. it can. Therefore, the composite insulator tube can be released from the mold without exerting an excessive force on the jacket in the subsequent release process. Therefore, the force applied to the bonding portion between the outer cover and the core member due to the release can be reduced, and the damage can be further reduced. In addition, since the force applied to the bonding portion between the jacket and the core member due to the release can be reduced and the damage to the bonding portion can be reduced, the hardening of the jacket in the conventional mold and the core of the jacket can be performed. The time conventionally required for bonding to the member can be reduced.

According to the composite insulator molding die, the composite insulator molding apparatus and the composite insulator molding method of the present invention, the valve mechanism of the ejector means is supplied from the gas supply means into the gas passage at the time of mold release. It is preferred to have a valve protruding into the envelope forming recess by gas pressure. By doing so, the outer jacket surface is separated from the inner surface of the jacket forming recess of the mold unit by the mechanical force of the valve protruding into the gas forming recess in addition to the gas pressure. A void is formed between the outer surface of the outer jacket and the inner surface of the recess where the outer jacket is formed, and the composite insulator can be more easily released from the mold. The ejector means is preferably provided in at least one mold unit of a pair of mold units. When the composite insulator is large, it is preferably provided in each mold unit.

[0009]

Embodiments of the present invention will be described below with reference to specific embodiments shown in the drawings. FIG. 1 shows a first embodiment of a mold apparatus for forming a composite insulator tube according to the present invention. FIG. 1 is a cross-sectional view showing a state in which a hollow core member 3 is attached to a jacket forming gap 2 of a pair of mold units 1-1 and 1-2 arranged to face each other horizontally. The sheath forming space 2 is a sheath forming portion 2-extending in the axial direction at the center of the mold unit.
1 and a cap forming portion 2- which is provided radially outward of the sheath forming portion at a predetermined interval in the axial direction and is continuous with the sheath forming portion 2-1.
It consists of two. The hollow core member 4 has mounting fittings 4 such as flange fittings attached to both ends thereof, and forms the jacket of the mold unit 1 in a state where the mounting fittings 4 are located at both ends of the jacket forming gap 2 as shown in FIG. It is mounted so as to be located in the recess. A hot water or hot water circulation path 5 is provided in the mold units 1-1 and 1-2 (circulation paths in the mold are not shown), and one end of the mold unit 1-1 has a center. A jacket forming material supply path 6 is provided, which opens at the tip of the cap portion and opens at the other end on the outer peripheral surface of the mold unit 1.
One end of the jacket forming material supply line is connected to the jacket forming material supply path, and the other end of the jacket forming material supply line is connected to the jacket forming material supply tank 8. 7 is provided with an on-off valve 9. In the embodiment of FIG. 1, a single supply system is shown. However, in the case of using a two-pack mixed type outer cover forming material, those skilled in the art can easily change the outer cover forming material supply system accordingly. Is possible. Reference numeral 10 denotes a vertically extending support for fixing the mold unit 1-2.
This is a mold opening / closing means for moving the mold unit 1-1 apart from and horizontally with respect to the mold 2 to open and close the mold.

The ejector means 11 is provided on at least one mold unit of the pair of mold units, and is preferably provided at an appropriate position and in an appropriate number between adjacent cap portion forming recesses and in the axial direction of the jacket forming recess. Gas supply port 12-1
The gas passage 12 comprising the gas supply path 12-2 and the mold 1
-2, a plurality of gas supply ports 12-1 having a conical shape, having an opening in the jacket forming recess,
-2. A conical valve body 13-1 is hermetically attached to the gas supply port 12-1, and one end of a valve rod 13-2 is connected to the valve body 13-1. A stopper 14 is provided at the other end of the valve rod 13-2, and the mold 1 is provided.
A spring 15 is disposed between the outer surface of the valve rod 13-2 in the radial direction and the outer periphery of the valve rod 13-2. -2
Are urged radially outward. In this state, the valve element 1
The surface of the cover 3-1 that faces the recess is a part of the inner surface of the recess (see FIG. 2A). In FIG. 1, reference numeral 16 denotes a part of a gas supply path, and each supply path 12-2
And the gas supply means 17. In the present embodiment, the valve body 13-1 is made to protrude into the jacket-forming recess by gas pressure, but the valve rod 13-2 and the valve body 13-1 are made to protrude by providing a suitable protruding means separately. It may be.

FIG. 2 (b) shows that after forming a jacket 18 on the outer peripheral surface of the hollow core member 3, gas is supplied through a gas supply path by a gas supply means 17 and a valve body 13-1 is formed. A state is shown in which a gap is formed between the outer surface of the jacket and the inner surface of the jacket forming recess by pushing up into the recess, and a pressurized gas flows into the gap. The pressurized gas also circulates between the outer surface of the jacket and the inner surface of the jacket forming recess in the circumferential direction, though not shown.
Normally, the composite insulator tube is opened with the mold insulator opened and then separated from the inner surface of the concave portion of the mold unit by a suitable releasing and moving member attached to the mounting bracket 4 at both ends. From the mold and take it out.

FIG. 3 shows a second embodiment of the present invention.
In the present invention, each ejecting means of the embodiment of FIGS. 1 to 2A and FIG.
a, 12-1b, 12-1c and the gas supply path 12-2a,
Gas passages 12a, 12 each comprising 12-2b, 12-2c
A plurality of gas supply ports 12-1a, 12-1b, and 12-1c have a conical shape and open to the recess for forming a jacket, and gas supply paths 12-2a are respectively provided. , 12-2b, and 12-2c.
The gas supply ports 12-1a, 12-1b and 12-1c have conical valve bodies 13-1a, 13-1b and 13-, respectively.
1c is hermetically attached, and one end of each of valve rods 13-2a, 13-2b, and 13-2c is connected to the valve body 13-1. Valve rods 13-2a, 13-2b,
Stop portions 14a, 14b, 14c are provided at the other end of 13-2c.
Are provided, and the outer surface of the mold 1-2 and the stoppers 14a, 14
b, 14c and the valve rods 13-2a, 13-2
springs 15a, 15
b, 15c are arranged. Since the operation and effect of this embodiment are the same as those of the first embodiment, the description is omitted. Compared with the embodiment of FIGS. 1 to 2 (a) and 2 (b), the embodiment of FIG. 3 makes it possible to more uniformly push the jacket of the composite porcelain tube outward from the jacket forming recess. It becomes possible.

FIG. 4 shows the valve bodies 13-1a and 13-1 of FIG.
This is an embodiment in which b and 13-1c are integrated and a semicircular valve body, and the other parts are almost the same as those in FIG. Compared to the embodiment of FIG. 3, the embodiment of FIG. 4 allows the outer jacket of the composite porcelain tube to be more uniformly pushed out of the jacket forming recess.

[Brief description of the drawings]

FIG. 1 schematically shows a mold apparatus for forming a composite insulator tube according to the present invention.

FIG. 2 (a) is a partial cross-sectional view showing a state in which a jacket is formed on the outer peripheral surface of a hollow core member in the composite insulator tube molding die apparatus of the present invention shown in FIG. 1, and FIG. This shows a state in which the outer surface of the outer cover of the composite insulator is separated from the mold by the ejecting means at the time of molding.

FIG. 3 schematically shows another embodiment of the mold for forming a composite insulator tube of the present invention.

FIG. 4 schematically shows still another embodiment of the composite insulator tube forming mold of the present invention.

[Explanation of symbols]

1-1, 1-2, a mold unit, 2, a recess for forming a jacket, 3, a hollow core member, 4, a mounting bracket, 5, a hot water or hot water circulation path, 6, a jacket formation. Material supply path, 7
Material forming material supply line, 8 Material forming material supply tank, 9 open / close valve, 10 unit mold unit fixed support base,
11. Eject means, 12 Gas passages 12, 12
-1, 12-1a, 12-1b, 12-1c... Gas supply ports, 12-2, 12-2a, 12-2b, 12-2c
..Gas supply paths, 13-1, 13-1a, 13-1b,
13-1c ··· Valve body, 13-2, 13-2a, 13-2
b, 13-2c ··· valve rod, 14, 14a, 14b,
14c: Stop member, 15, 15a, 15b, 15c
..Springs, 16 gas supply paths, 17 gas supply means, 18 jackets, 19

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 20 B29L 31:34

Claims (7)

[Claims] 1. A composite porcelain tube forming mold comprising a pair of mold units, wherein each of the mold units is provided with a jacket comprising a cap portion and a sheath portion on an outer periphery of a hollow core member. A hollow core member is arranged in a composite insulator tube molding die, and after closing the mold, a space for forming a shell around the hollow core member is filled with a shell forming material, and A composite insulator mold for curing a jacket material by heating the mold to a predetermined jacket material curing temperature,
Ejector means is provided for assisting the molded composite insulator to be released from the mold. The ejector means closes and separates the gas passage opening at one end to the jacket forming recess and the opening of the ejector means during molding. A composite insulator tube molding, comprising: a valve mechanism for opening the opening when the mold is opened to communicate the sheath forming recess with the gas passage; and gas supply means for supplying gas into the sheath forming recess through the gas passage. Mold. 2. A valve mechanism of said ejector means having a valve which is protruded into a jacket forming gap by gas pressure supplied from a gas supply means into a gas passage at the time of release. The mold for forming a composite insulator tube according to the above. 3. A mold for forming a composite insulator tube comprising a pair of mold units, means for heating the mold for molding a composite insulator tube, means for supplying material for forming a jacket, and a pair of mold units. Open
A mold forming apparatus for forming a composite insulator tube, comprising: a mold clamping means; and a mold forming recess for forming a mantle comprising a cap portion and a sheath portion on an outer periphery of a hollow core member in each of the mold units. Is provided, a hollow core member is arranged in a composite insulator molding die, and after the mold is clamped, a jacket forming material around the hollow core member is filled with a jacket forming material, and the mold is fixed to a predetermined outer shape. What is claimed is: 1. A composite insulator mold apparatus for curing a material to be formed by heating to a material-forming material curing temperature, comprising ejector means for helping the molded composite insulator to be released from a mold. The means includes a gas passage opening at one end to the jacket-forming recess, a valve mechanism for opening the opening of the ejector means at the time of molding and opening the opening at the time of mold release to communicate the jacket-forming recess with the gas passage, and a gas passage. Through the jacket forming recess Composite ceramic tube molding die apparatus, comprising the gas supply means for supplying gas to. 4. A valve mechanism of said ejector means having a valve which is protruded into a jacket-forming recess by gas pressure supplied from a gas supply means into a gas passage at the time of release. 2. The mold apparatus for forming a composite insulator tube according to item 1. 5. A composite porcelain tube forming mold comprising a pair of mold units, and a jacket for forming a sheath comprising a cap portion and a sheath portion on the outer periphery of the hollow core member in each of the mold units. A forming recess is provided, a hollow core member is arranged in a composite insulator forming mold, the mold is clamped, and then a jacket forming material is filled in a jacket forming recess around the hollow core member, and the mold is fixed to a predetermined shape. A method of forming a composite insulator tube, wherein the material is hardened by heating to a material-forming material curing temperature, wherein gas is released from the interface between the inner wall of the material-forming recess and the outer surface of the formed material. A method for forming a composite insulator tube, comprising: supplying gas to the mold to help the composite insulator separate from a mold. 6. An interface between the outer surface of the jacket formed at the time of mold release and the inner wall of the jacket-forming concave portion except for the cap portion is mechanically pushed up to prevent the composite insulator from being released from the mold. The method for forming a composite insulator tube according to claim 5, which helps. 7. An interface between the outer surface of the outer shell formed at the time of mold release and a supply opening for supplying gas to an interface between the inner wall of the outer shell forming recess and the outer surface of the outer shell formed at the time of mold release. 7. The method according to claim 6, wherein a portion other than the cap is mechanically pushed up.