JPH02271310A - Coating die for manufacturing optical fiber ribbon - Google Patents

Abstract

PURPOSE:To obtain the coating die which easily form a land long and where a single ribbon fiber can easily be inserted even by an unskilled person by using upper and lower separable die members which can be divided into two by a mutual abutting plane part. CONSTITUTION:In the plane-directional middle of the plane part 14 where the upper and lower die members 12 and 13 abut on each other, a UV resin reser voir pot 15 which has a UV resin supply hole 15a communicating with the outside and is divided into two by the plane part 14 is formed. On one flank of the pot 15, a nipple hole 16 is opened and connects with a nipple guide hole 17 which is open in the outside flank of a die 11 while divided into two by the plane part 14 and expanded. Then the die hole 19 in the external surface connects with the opening 18 in the other flank of the pot 15. When the single ribbon fiber is inserted into the die, the upper and lower die members 12 and 13 are separated, and consequently anybody can easily set plural single ribbon fibers without skillfulness for the insertion.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a plurality of optical fiber ribbons (hereinafter referred to as single tape cores), which are made by arranging a plurality of optical fibers in parallel and integrating them with UV resin. Optical fiber tape core wires arranged in parallel and integrated by coating with UV resin (
The present invention relates to a coating die for manufacturing an optical fiber tape (hereinafter referred to as a ring tape).

[Conventional technology]

Conventionally, in order to make a ring tape core by arranging a plurality of single tape cores in parallel, as shown in FIGS. 5(a) to (e),
Nipple guide hole 1a%Nipple l in which two sople holes 1b are continuously drilled, UV having UV resin supply hole 2a
A coating die 4 includes a bot part 2 in which a resin reservoir bot (hereinafter referred to as bot) 2b is provided, a die guide hole 3a, and a die body 3 in which a land 3C whose tip is a die hole 3b is connected. used. This coating die 4 is usually the above 2, pull 1
, the pot portion 2 and the die body 3 are each formed from separate blocks and then integrated into one piece.

In order to apply UV resin co-coating using this coating die 4, the single tape core wire 5 is pushed in parallel and pulled 1.
2. Pass through the nipple hole 1b from the pull guide hole 1a side,
Furthermore, die guide 33% of die body 3 Land 3C
Then, the UV resin is continuously supplied under pressure from the UV resin supply hole 2a into the bore 2b through the die hole 3b.
When it is moved to the side at a constant speed and pulled out from the die hole 3b,
UV resin is applied to a thickness that corresponds to the size of the die hole 3b of the die body 3, the length of the land 3C, and the resin pressure in the UV resin reservoir bottle 2b. The applied UV resin is cured by an ultraviolet lamp (not shown), and the ring tape core wire 6 is formed.

[Problem to be solved by the invention]

However, the size of the die hole 3b (land 3c) is extremely small, for example 0.4 x 2.2 ffim, and to form it, it must be done by electrical discharge machining, wire cutting, or a long hole must be precisely drilled. Therefore, when forming the nipple guide hole 1a and the die guide hole 3a in the block that forms the nipple 1 and the die body 3, the center of the block is made thin, and the nipple hole 1b or die hole 3b,
Land 3c is drilled, and the length of land 3C is 2m1.
It is difficult to set it to 1 or more. At this time, the die hole 3b
(The cross section of the land 3C) is larger than the cross section of the return tape core wire 6, so if the land 3C is short, the resin will not be applied uniformly when a plurality of single tape core wires 5 pass through the land 3C.
As shown in FIGS. 6(a) and 6(b), the mutual positions of the single tape core wires 5 forming the ring tape core wire 6 may deviate from each other, and the shape may have an angle instead of being aligned. there were.

Furthermore, when inserting the land 3C of the die body 3, it is impossible to visually see the land 3C, so inserting a plurality of single tape core wires 5 through the land 3C is an extremely difficult task that requires skill. .

Furthermore, the nipple hole 1b, the land 3C, and the die hole 3
b is a fixed hole, so the single tape core wire 5
Even if there is a slightly thick portion in the tape, it cannot pass through the nipple hole 1b, etc., and there is an inconvenience that the single tape core wire 5 must be cut and reinserted.

In view of the above-mentioned circumstances, the present invention allows the land to be easily formed to a long length, enables even non-experts to easily insert a single-tape core wire, and allows even a single-tape core wire with a partially thickened part to be inserted. An object of the present invention is to provide a coating die that can be passed through without cutting.

[Means to solve the problem]

In order to achieve the above object, the coating die for manufacturing optical fiber tape of the present invention is composed of an upper die member and a lower die member that are divided into two parts by a plane part that abuts each other, and In the middle of the direction, there is provided a UV resin reservoir bot which has a UV resin supply hole communicating with the outside and is divided into two by the plane part, and one side of this UV resin reservoir bot is divided into two parts by the plane part. A nipple hole with a flat cross section is opened, through which the plurality of divided optical fiber ribbons are passed in parallel, and this nipple hole is communicated with the outside by a nipple guide hole with a flat cross section that expands outward. , on the other side of the UV resin reservoir pot, is located on an extension of the nipple hole, is divided into two parts by a plane part, has approximately the same cross section as the nipple hole, and has a die hole at the tip that communicates with the outside. There is a land.

In addition, a nipple hole opened on one side of the UV resin reservoir pot is formed to have a cross section similar to and slightly larger than a cross section of an optical fiber ribbon in which a plurality of optical fiber ribbons are arranged in parallel. The nipple guide hole provided is
It is substantially similar to the above cross-section and gradually enlarges outwardly so that its external opening is substantially larger than the above-mentioned cross-section.

[For production]

Since the coating die for producing optical fiber tape according to the present invention has the above-described structure, a single tape core can be easily inserted into the nipple hole, the land, and the die hole, and the length of the land can be adjusted easily. It is possible to process and mold long coating dies. Furthermore, even if the single tape core wire has a somewhat thick portion, it can be passed through without being cut.

〔Example〕

FIGS. 1(a) to 1(g) show an embodiment of a coating die (hereinafter referred to as die) for manufacturing optical fiber tape according to the present invention, and in the figures, 12° and 13 indicate planes that contact each other. This is an upper and lower die member that is divided into two parts by a portion 14.

A UV resin supply hole 15a that communicates with the outside is provided in the middle in the plane direction of the plane part 14 where the upper and lower die members 12 and 13 are in contact with each other, and a UV resin reservoir divided into two by the plane part 14. A pot (hereinafter referred to as pot) 15 is formed.

On one side of the pot 15, there is a nipple hole 16 which is divided into two parts by the flat part 14 and whose cross section is almost similar to that of a core wire made by arranging two single tape core wires 5 in parallel, and which is slightly larger. is opened, and connected to this nipple hole 16 is a nipple guide hole 17 that is divided into two parts by the flat portion 14 and gradually enlarges to open on the outer surface of the die 11.

The cross section of the nipple guide hole 17 is similar to that of the nipple hole 1.
The external opening 1'7a is substantially similar to the cross section of the nipple hole 16, and its external opening 1'7a is sufficiently thick (formed) with respect to the cross section of the nipple hole 16.

Further, on the other side of the pot 15, there is a cross section that is located on the extension of the nipple hole 16, is divided into two parts by the plane part 14, and is almost similar to the cross section of the two single tape core wires 5 arranged in parallel. , and a land 18 having a predetermined size is open.

Therefore, the die 11 consisting of the upper and lower die members 12.
4, the nipple guide hole 17, nipple hole 16, pot 15, and land 18 are formed.
It is important to abut and fix the upper and lower die members 12 and 13 without any deviation, and after positioning them using two positioning pins (not shown) that are inserted perpendicularly through the abutting table surface, they are fixed using clamps, screws, etc. Fix it.

Since the die 11 is separated into upper and lower die members 12 and 13, the nipple hole 16, pot 15, land 18, etc. can be formed on the respective contact surfaces, and these parts can be fitted together. , the length, width, etc. of each part can be easily formed to have accurate dimensions.

Using the die 11 formed by the above-mentioned upper and lower die members 12 and 13, the multi-tape core wire 6 can be obtained in the same manner as in the past, but the length of the land 18 is long, and two single-tape core wires 5 are used. Since the dimensions of the parallel tape core wires relative to the cross section can be freely selected, the resulting multi-tape core wire 6 as shown in FIG. In addition, the thickness of the UV resin layer covering the multi-tape core wire is thin (it can be made freely, so it can be used as a multi-tape core wire 6 or by separating it vertically and forming a single tape core wire). You get something usable.

3(a) to 3(d) show other embodiments of the die 11 of the present invention, in which a lower die member 13 and an upper die member 12 are shown.
A groove 21 is provided in which the groove 21 is fitted. Nipple guide holes 1 are formed on the bottom surface 21a of the groove 21 of the upper die member 12 and on the surface of the upper die 13 that contacts the bottom surface 21a, respectively.
7. The die 11 is obtained by processing and molding the parts that will become the nipple hole 16, pot 15, land 18, etc., and fixing them together.

In this case, the positions of the upper and lower die members 12.13 are determined by the groove 21 and both end surfaces 22 in the length direction, so
These die members 1 do not necessarily require a positioning bin.
2.13 is fixed by screws 24 perpendicular to the side abutment surfaces 23. Further, as shown in FIG. 3(b) and FIG. 4, bottomed holes 25 are bored perpendicular to the side abutting surfaces 23 of the upper and lower die members 12.13 and facing each other. bottom hole 2
5 has a built-in coil spring 26 that is biased in a direction away from the upper and lower die members 12 and 13. When manufacturing a multi-tape core wire using this die 11, the single tape core wire has a thick portion and is difficult to pull out. Even if it cannot be moved, if you loosen the screw 24, the upper and lower die members 12.1 can be moved as shown in Figure 4.
3 shows the separated state, the coil spring 26
As a result, the upper and lower die members 12 and 13 are separated, allowing the single tape core to pass through without being cut.

In addition, in the above description, a multi-tape core wire in which two single tape core wires, which are four strands of wire integrated in parallel, are arranged and integrated, was explained, but two single tape core wires of two strands and four strands A single-tape core may be used, and a multi-tape core in which three or more single-tape cores are integrated in parallel can also be produced in the same manner.

[Experiment example] Using the die 11 having the shape shown in FIG. 3(a), dice with land lengths of 2, 4, 6, and 8.10++ l11 were made, and each die had a land length of 1500 to 2000 cm.
PS UV resin from the supply hole at 1.0 to 15 kg/a
1000 to 10
20 multi-tape cables of 1,000 m length were cut at intervals of 1,000 m, and each cut surface was observed using a microscope.
When a multi-tape core wire with a length of 2,111,111 mm or less is accepted as a passed product, the pass rate for a die with a land length of 2111111 is 80%, 4I
It was 95% for IIffl, and 100% for land lengths of 5 mm or more, indicating that for land lengths of n+m or more, the UV resin coating was uniform and the multi-tape core shape was stable.

〔Effect of the invention〕

As described above, since the die according to the present invention is composed of upper and lower die members that can be freely separated, the length or shape of the pull guide hole, nipple hole, pot, and land can be changed freely. It also has high dimensional accuracy (because it can be formed, the single tape core wires that make up the multi-tape core wires do not shift or have any angles, and the U resin coats multiple single tape core wires in parallel). Since the layer thickness can be thin, the multi-tape core wire made using this die is
Of course, it can be used not only as a multi-tape cable but also as a single tape cable by tearing it lengthwise.

In addition, when inserting a single tape core through a die, the upper and lower die members are separated, and multiple single tape cores are inserted into the nipple holes, lands, etc. formed on the contact surface of the lower die member. Since all you have to do is arrange the wire and fix the upper die member, no skill is required for insertion, and anyone can easily set it up.

Furthermore, even if there is a part of the single-tape core wire that is too thick to pass through the die when the single-tape core wire is passing through the above-mentioned die, it is easy to separate the upper and lower dies by loosening the screws, etc. Since it is only necessary to pass through the tape and then tighten the upper and lower die members again, there is no need to cut the single tape core wire, which has many advantages such as extremely high work efficiency.

[Brief explanation of drawings]

Figures 1(a) to (g) show an embodiment of the coating die of the present invention, and Figures 1(a) and (b) are perspective views;
Figure 1(C) is a view taken along line 8-A in Figure 1(a), Figure 1(d) is a view taken along line B-B in Figure 1(C), and Figure 1(e)
is a cross-sectional view taken along the line CC in FIG. 1(C), FIG. 1(f) is a cross-sectional view taken along the line D-D in FIG. 1(C), and FIG.
A view taken along the line E-E in Figure (C), Figure 2 is a cross-sectional view of the multi-tape core wire, and Figures 3 (a), (b), (c) and (d) are views of the coating die of the present invention. 3(a) is a perspective view, and FIG. 3(b) is a perspective view of FIG. 3(a).
-F line arrow view, Figure 3(C) is a sectional view of Figure 3(b) along line G-G, Figure 3(d) is Figure 3(b) line H-H arrow view. A sectional view, FIG. 4 is a side view showing a state in which the upper die member of FIG. 3(a) is separated, and FIGS. Figure 5(a) is a perspective view, Figure 5(b) is a sectional view taken along the line [-1] in Figure 5(a), and Figure 5(C) is a sectional view taken along the line J--J in Figure 5(b). visual view,
5(d) is a sectional view taken along the line - in FIG. 5(b), FIG. 5(e) is a sectional view taken along the LL line in FIG. 5(b), and FIG.
) is a sectional view of a multi-tape cable in which single-tape cables are integrated with deviations, and FIG. 6(b) is a sectional view of a multi-tape cable in which the single-tape cables are integrated with angular changes. 1...Nipple, 1a...Nipple guide hole, 1b...Nipple hole, 2...Pot part, 2a...UV resin supply hole , 2b...UV resin reservoir pot (pot), 3.
...Die body, 3a...Dice guide hole, 3b...Dice hole, 3c...Land, 4...Coating die, 5... ...Optical fiber tape core (single tape core) that integrates multiple optical fiber strands in parallel, 6...
...A plurality of single tape cores are integrated in parallel to produce an optical fiber tape core (belly tape core), 11...Coating die (dice) for producing optical fiber tape core, 2... ...Upper die member, 13...Lower die member, 4...Flat part, 5...UV resin reservoir pot (pot), 5a.
...UV resin supply hole (supply hole), 6...
Nipple hole, 17... Nipple guide hole, 7a
...External opening, 18... Land, 19
...Die hole, 21...Groove, 21a...
...Bottom surface, 22...Both end surfaces, 23...
Side contact surface, 24... Screw, 25...
Bottomed hole, 26... Coil spring. Deyorijin Fujikura Electric Wire Co., Ltd. 17 (17a) 3rd (C) (d) Figure 4"2b (C) 5th (e)

Claims (2)

[Claims] (1) Multiple optical fibers are arranged in parallel and UV resin (
A coating die for manufacturing an optical fiber tape having a structure in which two or more optical fiber tapes are further integrated in parallel with each other using a UV curable resin (ultraviolet curing resin), and the coating die is , is composed of an upper die member and a lower die member that are divided into two parts by a plane part that abuts each other, and has a UV resin supply hole communicating with the outside in the middle of the plane part in the plane direction, and the two parts are divided by the plane part.
A UV resin reservoir pot that can be divided is provided, and one side of the UV resin reservoir pot is divided into two parts by the flat part.
A nipple hole with a flat cross section is opened, through which the plurality of divided optical fiber ribbons are passed in parallel, and this nipple hole is communicated with the outside by a nipple guide hole with a flat cross section that expands outward. , on the other side of the UV resin reservoir pot, is located on an extension of the nipple hole, is divided into two parts by a plane part, has approximately the same cross section as the nipple hole, and has a tip communicating with the outside that is connected to the die hole. A coating die for manufacturing an optical fiber tape core, which is characterized by being provided with a land that is shaped like this. (2) A nipple hole that opens on one side of the UV resin reservoir pot is formed to have a cross section that is almost similar to, and slightly larger than, the cross section of an optical fiber ribbon in which a plurality of optical fiber ribbons are arranged in parallel. The consecutive nipple guide holes are
2. The coating die for manufacturing an optical fiber ribbon according to claim 1, wherein the die has a cross section substantially similar to the cross section and gradually expands toward the outside, and has an external opening that is sufficiently larger than the cross section.