JPS59160105A - Method and apparatus for manufacturing cable with dielectricbody for extrusion molding - 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 TECHNICAL FIELD The present invention relates to a method and apparatus for manufacturing cables with extruded dielectrics, particularly cables for conventional underwater telecommunications equipment.

Conventional technology Conventional technology includes seams, varnishes, etc.
S, Parfree) - P, Worthington (P,
Warth-Inton) 5-2 and 8-5 relate to the structure of optical fiber submarine cables. ((Other prior art includes - No. 15-9 by the above-mentioned inventors, which discloses a method for manufacturing submarine optical fibers;

Varnish, parfrey and others 17-5-2 and 18-10
-4 discloses the improvement.

Purpose of the invention
10-4 is shown, and an object of the present invention is to facilitate the manufacture of such a cable. %, there is a requirement that the thickness of the dielectric layer of such a cable must be kept constant in order to ensure the necessary dielectric properties, and that it must not be less than a predetermined thickness Tv. This process in the manufacture of cables requires that all optical fibers be spliced at the center of the cable. In this case, the center conductor and the extrusion process have mutually extended sections as a buffer section of the feed cable, and these extended sections are subjected to continuous rectification in order to restore the desired properties of the center conductor. are mutually (C-jointed) using joints of the same diameter that require

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for manufacturing a cable comprising at least one conductor and a tensile strength member, the method comprising at least one conductor and at least one strength member. The six-shell sheath is fully extruded covering both sides, and the conductor and strength member are joined before extrusion of the dielectric material. The joint is passed through an extruder so that it is extruded over the extruder, and the extrusion head of the extruder is used to insert an extrusion 2 with variable dimensions that fits into the joint so that the joint passes through the extruder. having India;

According to another aspect of the invention, an apparatus is provided for extruding dielectric material over a bonded cable, the apparatus comprising a plurality of extruded dielectric materials that are interfitted to form a substantially full truncated cone. An extrusion having a variable orifice defined by the individual segments and a nominal extrusion are provided with means for pressing the segments together to define a zone orifice.

EXAMPLES Prior to a detailed description of the present invention, the structure of a goople produced according to the present invention will be explained. In Fig. 1, the cable is made of high-strength steel wire and has an optical fiber mother cage in the center part B, which is made of a cage strong member A, and the high-strength steel wire has improved 4-electroconductivity. In order to do this, copper plating is done, and then plastic is applied.

Eight single-mode secondary optical fibers B are provided around the strength member A, and the optical fibers B are packaged together with the strength member A by a fiber cage holder C. Preferably, 200 denier ribbon-like Kevlar transverse fibers are used.

The fiber/'Py cage and the thyroid cavity between it and the internal hole of the resting member E are filled with a moisture sealing compound.The main function of this moisture sealing compound is to protect the core when the cable is damaged. substantially restricts moisture infiltration along the length.

Around the core member E, a laminated material +h1 piece F is provided.

This is, for example, a heat-sealed plastic tape such as ethyl acrylic tape with aluminum foil tape 91 on both sides, and a heat-sealed plastic tape is applied to the member E so as to obtain an airtightness around it. be done.

Around the mounting core E, there are two
Two layers, G and H, are provided, G and H are arranged to provide the required tensile strength of the cable. I'm blitzed by this. In groove membrane cables, this withstand pressure y
You will need an order of 18 tons of broken cooperation. Due to this pressure immersion method, when using a fiber cable held tightly in the center hole of the R-body member, the compressibility is released by its own strength.

Ethylene sealing J is directly extruded into the heel of the wire rod for the strong deer parts, and 1? The polyethylene seal J] forms an electrical isolation between the outside world and the electrical signals transmitted to the electrically conductive central core E when the cable is in use.

One or more pieces (1 piece or more) are installed on the outside of the QN"S material J.

This couple is manufactured by the method described below.

In FIG. 1, an optical fiber/Yakgano P 84 central core A and eight original fibers Be are provided. This package is placed in a partially cut-out C-shaped tube E, which is closed around the optical fiber at station 2o. The aluminum closed C-shaped tube encasing the optical fiber is sent to station 30 and supplied with strength members G and H.

From station 30 the core with strength members around its periphery is sent to station 40 where high-density polyethylene G is coated over the strength members to complete the fiber optic submarine cable in its lightweight form. extruded.

Although not shown, an armor wire is provided around the outside of the dielectric J to protect the cable in shallow water locations.

During the manufacturing process of this cable, a point arrives at the station 20 where at least one of the optical fibers
When the book needs to be spliced to another optical fiber, the manufacturing process is as follows.

Before the closed C-shaped body enclosing the original fiber reaches the strand station 300 strength member, a splice is made on the optical fiber and the C-shaped body has a C-shaped bone to enclose the spliced portion. A ferrule housing is provided with a diameter slightly smaller than the outer diameter of the body. This "bulge" of the C-shaped body (passing through the bust strand station 30 creates a "bulge" corresponding to the strength member around the ferrule of the C-shaped tube). Upon entering extrusion station 40, the variable orifice extrusion point of station 40 expands slightly to accommodate the bulge of the strength member.

Machima Oriais extrusion points are shown in detail and numbered in Figures 3 and 4.

4A is a front perspective view of one of the segments 50, and FIG. 4B is a complete bottom view of the same segment.

FIG. 4 is a simplified view of the eight interdigitated segments ffi, viewed from the point at which the front or couple leaves the extruder head.

3 and 4, the variable orifice extruder includes a plurality of generally triangular shaped segments 50 made of metal. The segment is the outer surface of the truncated cone 5
1. They are fitted together to form a complete structure. Each of the segments? The edge surface 52 of I [1, the inner surface 53 surrounding the surface of the strength member H, and the edge surface 55 of the opposing lower eye 11, as the core of the strength member and cable pass through the extruded Sakaki tube. have

Each segment is pivoted at the end remote from the extrusion point around Q, the keratus being substantially parallel to surface 53 and bisecting the angle between edges 52 and 53A. Further, a lip 54 is provided on its surface, and this lip has two functions. First, it has a taper 54b relative to the axis of the cable, which is effective in providing "feed" to the cable as it passes through the extrusion head. Second, the lips 54 provide adjacent points 54a so that adjacent segments fit into the missionary position. A strong circular spring (not shown) forces the adjacent point 54a to resist further inward motion. All segment edges 7 around the cut.
'' in a radial and inward direction so that the orifice of the extrusion head defines a lateral flat circle that exactly matches the outer surface of the strength member H on the cable core. This lateral flat circle is shown in FIG. 56.

As the bulge of the strength member passes through the extrusion head, the bevel opens slightly to allow the bulge to pass through the bulge feed seat e54b of the lip 54. This minimizes the additional pulling force required to pull the cable through the extruder, since the springs that heat the segments together are extremely strong and can be applied without fine feed f). This is because the cable is required to be pulled out in order to pass through the cable and open the segment (segment).

Each segment edge surrounding the next segment undergoes a full "wipe-and-shield" action, which has the effect of completely sealing the edge from the ingress of extruded material; act.

Once the bulge has passed through the segment, the segment returns to its normal orifice size 56.

The expected behavior corresponds to a radial change of approximately five times the diameter of the strength member. As a result, the plastic dielectric becomes thinner at the point of bulge, as the outer diameter of the extrusion head or die that is covered by the cylindrical portion 57 is constant. If necessary, this can be done by gluing further dielectric material onto the thin dielectric to restore the required thickness, or the internal bonding of the fiber and/or the strength member is merely temporary. In some cases, the bonding operation is performed subsequent to recovery of the sheath. On the other hand, the present invention (d) when temporary or permanent bonding is done before reaching the extrusion point in the cable, allows the extrusion process to operate continuously and is not stopped.

On the other hand, the variable die 57 is configured to be co-linear with the extrusion point so that the die opens to provide a full increase in dielectric thickness before the "bulge" reaches the extrusion point and the "bulge" is closed after passing. The die and extrusion point can be linked mechanically to do this or hydraulically or electrically to make the necessary openings. controlled.

The die is opened to the same or greater extent than the extrusion point until the extrudate is no longer in contact with the die, in which case the extrusion ↑rad is carried out in such a way as to draw the extrudate onto the strength member. The action of the die maintains the body thickness on the joint as well as the rest of the cable.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a submarine cable manufactured according to the present invention, FIG. 2 is a block diagram showing a station for manufacturing the cable shown in FIG. 1, and FIG. 3 is an extrusion as an embodiment of the present invention. 4 is a longitudinal sectional view of the molding device, and FIG. 4 is a front view of the extrusion molding device shown in FIG. 3, and FIGS. 4(A) and 4(B) show a portion of the extrusion molding device shown in FIG. 4. (Explanation of symbols) A...i9 package strength member, A'...Plastic covering A% B...Optical fiber, C...Packeno holder, E...C-shaped tube body, F... Side stop strip, G,
H... Strength member, J... Insulating material, K... Exterior layer, 20, 30.40... Station, 50...
Segment, 51...outside (1111 surface, 52...
First edge surface, 53...inner surface, 53a...edge, 5
4...Rep, 54a...Face point, 54b...Te"
', 55...lower line surface, 56...opening, 57...
・Cylindrical part. Patent applicant: International Standard Electric Corporation Patent agent: Akira Aoki, patent attorney: Kazuyuki Nishidate, patent attorney: Masashi Matsushita, patent attorney: Akira Yamaguchi Procedural letter (method) June 1, 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case, Patent Application No. 33922, filed in 1982, 2, Title of the invention, Method and apparatus for manufacturing a cable provided with extrusion-molded dielectric material 3, Person making the amendment Relationship with the case Patent applicant Name: International Standard Electric Corporation 4, Agent address: 8-10-5 Toranomon-chome, Minato-ku, Tokyo 105
Date of amendment order 6, ? ``Applicant's Representative'' column (2) of DI positive subject fil 1-ii
Specification (3) Drawings (4) Power of Attorney 7, Contents of amendment (1) (As shown in 4.1 Attachment (2) Engraving of the description (no change in content) (3) Engraving of drawings (no change in content) ) 8. List of attached documents (1) Application for correction (1 copy) (2) Engraved specification (1 copy) (3) Engraved drawings (1 copy) (4) Power of attorney and translation (1 copy each) Procedural amendments Patent dated October 24, 1982 Office Commissioner Kazuo Wakasugi 1. Indication of the case 1988 Patent Application No. 053922 2. Title of the invention 3. Relationship with the case by the person making the amendment Name of the patent applicant International Standard Electric Corporation 4. Agent 5 Amendment (1) Kusunoki in the “Detailed Description of the Invention” in Specification 1 (2) Drawing (Figure 2) 6. Contents of Amendment (1) ■ Page 7, line 11 of the specification, “Regulating .”
After that, add ``El represents the boundary surface where E touches each other, and D represents the space between Q and E.'' ■ Same, page 8, line 15, “Figure 1” was changed to “Figure 2”
Correct to. ■ Same, page 8, line 18, "entered" is replaced with "iri"
(・Correct this. (Fill Figure 23 and 2 as attached.) Z List of attached documents

Claims (1)

Claims: 1. A method of manufacturing a cable comprising an extruded dielectric having at least one conductor and a tensile strength member, the method comprising: prior to extrusion of the dielectric material, joining at least one of the conductor and the strength member, the joining radially expanding the conductor and the strength member; and the joining portion passing through the extruder so that the dielectric is extruded over the joint, the extruder head having an extrusion pointer of variable size; a point adapted to accommodate the joint as it passes through the extruder;
A method of manufacturing a cable including an extruded dielectric. 2. The method according to claim 1, wherein the joint is pulled out through an extrusion molding machine, and the repulsive force of a spring at the extrusion point forces the extrusion point to fully open. 3. The method according to claim 1 or 2, comprising the step of inserting a ferrule into the strength member in order to join the strength member at the joint portion prior to the extrusion process. 4. After the dielectric has been extruded over the cable, the dielectric in the joint area is removed and the temporary bond at the bottom of the dielectric is replaced by a permanent bond for at least one of the conductor and the strength member; A method according to any one of claims 1 to 3, wherein: is restored. 5. A method according to any one of claims 1 to 4, in which the dimensions of the dielectric on the die or joint cooperating with the extrusion point are varied so as to maintain the same thickness. 6. Apparatus for extruding dielectric material over a bonded cable, the apparatus comprising a variable molding device defined by a plurality of segments interfitted to form a substantially truncated cone. Apparatus for extruding dielectric material over spliced cables comprising an extrusion point having an orifice and means for pressing the segments together to define a nominal J414-', L point orifice. 7. Each of the segments has longitudinal ribs for supporting the cable passing therethrough, and the joint defines a trout bevel supporting the matching segment away from the joint! : Write 1 in @! ,! equipment. 8. A patent claim in which each of the segment pistons around the axis is sloped with respect to a circular surface defined by the dog end of the truncated cone, and further slopes into a joining relationship with the segments on its circumference. 9. The device according to claim 6 or claim 7. 9. The device according to any of claims 6 to 8, wherein the device has a variable die cooperating with a variable extrusion point. Apparatus: 10. The apparatus of claim 9, wherein the die is arranged to open at or above the variable extrusion point.