JPS6237817A - Manufacture of cable with water shield - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

3. Revised explanation of the invention [Technical field of the invention] The present invention is a couple with continuous water! 'Relating to the manufacturing method. [Technical backbone of the invention and its problems] The couple (nonople with water shielding) that has been launched 1 is
A water-shielding tape is attached vertically to the cable core, and this water-shielding tape is brought into close contact with the above-mentioned cooling layer to form a water-shielding layer. However, this ready-to-use coating method is roughly divided into a pressure one-way method and a 2-hour method called the Chiko Pink method. In addition, the C tape and sheath were not in close contact with each other, and there was a drawback that the water tape wrinkled or fin-like protrusions were formed due to the pressure of the child. - The ping method uses a drawer or a vacuum between the vertically attached tape and sheath.

[Negative j1:, binding, 5')
The salt water tape and sheath are made to be tightly sealed;
The pressure exerted by pulling down or vacuuming was very small, and the adhesive force between the coupe and the tape (peel force) was low and easily varied. . [Object of the Invention] The present invention has been made in view of the circumstances described in (11). Therefore, there is no risk of wrinkles or fin-like protrusions occurring in the water-blocking tape, and the above-mentioned team is uniform and does not require any intervention. [Summary of the Invention] The method for producing a water-shielded pull cable of the present invention provides a method for producing a water-shielded cable that provides adhesive strength between the cable and the sheath. It is characterized in that the water-shielded cable is passed through a cold 7Jl tank filled with coolant. The cable 1-1 with the mAc tape 1a longitudinally attached is passed airtight through the cold 1.04113 whose axis is horizontal to the extruder 11 exiting the extruder 2. In addition, in Figure '1, 41 is the seal par-1-ring installed at the entrance and exit of the cold LI'I tank 3, and 5 is the cold LD.
A water tank 6 stores water, and 6 shows a pressurizing pump that circulates cooling water in the cooling tank. Also, )θfJl water pressure is 0. 1 KO,/cm2・~5Kft, -'
Cm2 is set. As mentioned above, the cable core 1 immediately after the extrusion 1 is coated with the water-shielding tape 1a is passed through the cooling bath 3.The water-shielding tape 1a and the cable core 1 are coated with cold IJ water ( J'', refrigeration 1. Under pressure such as JI 1), the water-blocking tape 1a is tightly attached to the sheath. Fig. 2 shows another embodiment of the present invention, with the same parts as Fig. Water-shielding tape is applied vertically λ and IC canal water-shielding = t) l--Full 10 is passed through the cold fJI tank 3 with its axis vertically (, 2) and open on the top.Cold?
The cold moon water in the JI tank r3 is circulated by a pump (not shown). The pull that has passed through the 11 tanks 3 changes its direction at the guide pulley 7 and is then sent to the C winder (not shown). In addition, 4 in the figure is cold 7J1
4! Then install the seal and the 4th ring is shown. As described above, immediately after the extrusion, the cable 1
0 is cold 7. ．． By passing through tank II 3, it is cooled by the cold water in the tank and pressurized by its static pressure. It is pressed tightly against the sheath. 8. In this embodiment, since the cold wood is not pressurized, it is not necessary to make the seal backing 4 tightly adhere to the cable.
There is no risk of U on the sheath surface.The same part as in Fig. 2 has No. 11 At L. Fig. 3 shows the third embodiment of the present invention. In this embodiment,
The cable 10 with water that has come out of the extrusion head 2 is passed through a horizontal cold JI tank 3 with seven sides. Receives the static pressure of the water (is pressed against the sheath and comes into close contact with the sheath I); 6i. Since no seal backing is used in this embodiment, there will be no damage to the sheath. , the present invention (,1) is not limited to the above embodiments. For example, the cold J1 shrine can be made using not only water as shown in the example, but also other suitable cold IJl materials. [Effects of the invention] According to the present invention, in order to attach the water-shielding tape from all directions through the sheath using water pressure, the cable with a water-shielding layer is coated with wrinkles or fin-like protrusions in the water-shielding layer. It can be manufactured without any water-blocking cables, and has a uniform and sufficient adhesive force between the water-blocking tape and the sheath, making it possible to improve the quality of the water-shielding cable and reduce the cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of a second embodiment of the present invention.
FIG. 3 is a sectional view of the third embodiment.

Claims (1)

[Claims] A method for manufacturing a water-shielded cable, which comprises passing a cable formed by extruding a sheath onto a cable core longitudinally attached with water-shielding tape through a cooling layer filled with a coolant.