JPS63268408A - Connection of extrusion mold of insulated cable - Google Patents

Abstract

PURPOSE:To form a cavity adapted for the eccentricity of a connector by setting an adapter in a metal mold. CONSTITUTION:The outer periphery 7 of a metal mold 5 is engaged with a cylindrical face 4 having larger inner diameter than that of a mold cavity 3, and an adapter 8 formed with the cavity 3 adapted for an eccentricity of a conductor connector 2 of insulated cables 1, 1' with respect to the periphery 7 is set. Then, the connector 2 of the eccentric cables 1, 1' is disposed in the cavity 3, and the adapter 8 is rotated along the face 4 to so regulate that the eccentric direction of the cables 1, 1' coincides with that of the cavity 3. Polyolefin of an insulator is extruded in the cavity 3 by an extruder, not shown, in fig. to insulate and connect the eccentric connector 3 of the cables 1, 1'. Accordingly, since the thickness of the insulator formed on the periphery of the connector 3 can be formed uniformly in a predetermined size, insulation is obtained.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to insulation for making an unbreakable connection by extruding an insulator such as a synthetic resin around the conductor connection part of an insulated cable such as a cross-linked polyethylene insulated cable. This invention relates to a cable extrusion mold connection method.

[Prior Art] In the conventional extrusion mold connection method for insulated cables described above, as shown in FIG. Depending on the machine, the above insulated cable 1.1'
An insulator made of synthetic resin such as polyolefin was extruded around the conductor connection portion 2 to insulate and connect it.

[Problems to be Solved by the Invention] In this conventional extrusion mold connection method for insulated cables, the conductor connection portion of the insulated cable is placed in a certain mold cavity of the extrusion mold, so that the conductor If the conductor connection part of the insulated cable is eccentric due to a bend in the connection part, the conductor connection part of the insulated cable will not be placed in the center of the mold cavity of the extrusion mold, and therefore the conductor connection part of the insulated cable will not be placed in the center of the mold cavity of the extrusion mold. Since the thickness of the insulator made of synthetic resin such as polyolefin extruded around the connection part cannot be uniformly formed to a required dimension, there is a problem in that the insulation properties of the conductor connection part are reduced.

In addition, if the overall thickness of the above insulator is increased to ensure sufficient insulation in the thin part, the thickness of the insulator in other parts becomes unnecessarily thick, and the insulator's synthetic resin etc. There was a problem that the amount used increased and became uneconomical.

[Means for Solving the Problems] In order to solve the problems in the conventional products described above, the present invention arranges the conductor connection portion of the insulated cable in the mold cavity of the extrusion mold, and In the extrusion mold connection method for insulated cables in which an insulator such as synthetic resin is extruded around the conductor connection part of the insulated cable for insulation connection, a mold cavity adapted to the eccentricity of the conductor connection part of the insulated cable is provided inside the extrusion mold die. It is designed to include an adapter to form the .

[Function] According to the above-described means of the present invention, the synthetic resin is extruded around the conductor connection portion of the insulated cable in response to eccentricity of the conductor connection portion of the insulated cable due to bending caused in the conductor connection portion of the insulated cable. An adapter that forms an eccentric mold cavity so that the thickness of the insulator is uniform is set in the mold, and an insulator such as synthetic resin is extruded around the conductor connection part. The thickness of the insulator made of synthetic resin such as polyolefin around the conductor connection portion can be uniformly formed to a desired dimension.

[Example] The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows an embodiment of the extrusion mold connection method for insulated cables of the present invention, and shows an insulated cable 1.1-
The insulating connection of the eccentric conductor connection portion 2 is achieved by fitting the outer periphery 7 into the cylindrical surface 4 of an extrusion mold 5 whose interior is formed into a cylindrical surface 4 having a larger diameter than the mold cavity 3, and at the same time, the outer periphery 7 is fitted inside the extrusion mold 5. An adapter 8 having an eccentric mold cavity 3 formed therein in accordance with the eccentricity of the conductor connection portion 2 of the insulated cable 1.1- is set. Next, the insulated cable 1.1 is placed inside the mold cavity 3.
', and rotate the adapter 8 along the cylindrical surface 4 so that the eccentric direction of the insulated cable 1 and the eccentric direction of the mold cavity 3 are aligned as shown in FIG. Adjust to match. Then, polyolefin as an insulator is extruded into the mold cavity 3 using an extruder (not shown) to insulate and connect the eccentric conductor connection portion 2 of the insulated cable 1.1'.

A plurality of adapters 8 are prepared in which the eccentricity of each of the mold cavities 3 is formed to have various dimensions. Further, the adapter 8 is preferably fixed inside the mold 5.

[Effects of the Invention] As explained above, the extrusion mold connection method for insulated cables according to the present invention includes arranging the conductor connection portion of the insulated cable in the mold cavity of the extrusion mold die, In an extrusion mold connection method for insulated cables in which an insulator such as a synthetic resin is extruded around the periphery for insulation connection, a mold cavity adapted to the eccentricity of the conductor connection portion of the insulated cable is formed inside the extrusion mold die. Since the adapter is set, the thickness of the insulator formed around the conductor connection portion of the insulated cable can be easily made to a uniform required size. Therefore, sufficient insulation is ensured at the conductor connection portion, and the amount of synthetic resin used as the insulator is optimized, resulting in economical advantages.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the extrusion mold connection method for insulated cables of the present invention, FIG. 2 is a cross sectional view of FIG. FIG. 1.1'...Insulated cable. 2...Conductor connection part. 3...Mold capacity. 4... Cylindrical surface with a large diameter. 5...Mold. 6... Internal cylindrical surface. 7...Outer circumference. 8...Adapter.

Claims (1)

[Claims] (1) An extrusion mold connection method for insulated cables, in which the conductor connection portion of the insulated cable is placed in the mold cavity of an extrusion mold die, and an insulator such as synthetic resin is extruded around the conductor connection portion of the insulated cable for insulation connection. An extrusion mold connection method for insulated cables, characterized in that an adapter for forming a mold cavity adapted to the eccentricity of the conductor connection portion of the insulated cable is set inside the extrusion mold.