JPS6363087B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background and Objectives of the Invention] The present invention relates to an extrusion device used for coating electric wire cables with insulation, sheathing, etc.

In conventional extrusion equipment, when the outer diameter of the wire cable to be coated changes, the mandrel and cap must be replaced each time, and the extrusion line must be temporarily stopped for replacement. This required a considerable amount of setup time. The present inventors believed that in order to improve the productivity of an extrusion line, it was necessary to shorten or completely eliminate this setup time, and as a result of extensive research, they arrived at the present invention.

That is, an object of the present invention is to provide an extrusion device that can replace the mandrel and the mandrel without stopping the line in order to eliminate the drawbacks of the prior art described above and shorten or reduce the setup time for replacing the mandrel and the mandrel. It's about doing.

[Summary of the invention]

The gist of the present invention is to provide a cylindrical core cap in which the core and the cap are integrated, which has a window into which an insulator such as rubber or plastic or a sheath material flows, and which can be divided into two parts; This extrusion device consists of a through hole through which the core cap can be inserted from the rear and taken out from the front, and a crosshead having a claw for fixing the core cap, as follows:
An embodiment of the present invention will be described with reference to the drawings.

〔Example〕

FIG. 1 is a longitudinal cross-sectional view of an extrusion device showing an example of the present invention, and includes cylindrical and integrated core caps 4 and 5, and the core caps can be inserted from the rear of a nipple holder 10 and taken out from the front. It consists of a crosshead 6. FIG. 2 is a perspective view of the core caps 4 and 5, in which the cap 4 is integrally assembled with the core cap 5 and has a configuration in which the whole is divided into two parts, and the cap 4 is made of rubber, plastic, etc. It has a window 11 through which the insulation or sheathing material flows.

Next, to explain how to replace the core cap in the work of covering electric wires and cables using the extrusion device of the present invention, as shown in FIG. Assemble and push the cable into the crosshead 6 at its joint. In this case, it is desirable to use a special jig or auxiliary means such as a hydraulic cylinder. Then, when the next work guard caps 7 and 8 reach the back side of the current work guard caps 4 and 5 that have been used up until then, the die holding pawl 3 attached to the front part of the crosshead 6 is opened and the current work guard caps are opened. Push out caps 4 and 5. After the current work guard caps 4 and 5 are pushed out, the pawl 3 returns to its original position and fixes the next work guard caps 7 and 8. The current work caps 4 and 5 pushed out of the extrusion device are split into two and removed from the cable 2. At this stage, the exchange of the core cap between the current work and the next work is completed. In this way, even if the outer diameter of the wire cable to be coated changes, the core cap can be replaced without stopping the line.

The extrusion apparatus of the present invention can be used not only for coating electric wires and cables, but also for molding of rubber, plastic, etc.

〔Effect of the invention〕

According to the present invention, the core cap can be replaced instantly and while the line is running, and therefore electric wire cables with different outer diameters can be manufactured continuously, that is, without requiring setup time. can.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an extrusion device showing an example of the present invention, and FIG. 2 is a perspective view of a core die in the present invention. 1...Rubber or plastic, 2...Cable (for current work), 3...Die holding pawl, 4...Clip (for current work), 5...Core (for current work), 6...Crosshead, 7...Clip (next) (for work), 8... Core metal (for next work), 9... Cable (for next work), 10... Nipple holder, 11... Window.

Claims (1)

[Claims] 1. A cylindrical core cap in which the core and cap are integrated, has a window through which the insulator or sheath material flows, and can be divided into two as a whole, and this core cap is inserted from the rear and taken out from the front. 1. An extrusion device for covering electric wires and cables, characterized in that the extrusion device is comprised of a crosshead having a through hole capable of opening the wire and a crosshead having a pawl for fixing a core cap.