JPH03231211A - Device for producing long-sized body furnished with spiral colored wire - Google Patents

Abstract

PURPOSE:To uniformize the width of a spiral colored wire by allowing the first-stage annular colored wire material feed groove to correspond to the colored wire material injection port and the last-stage groove to the colored wire material extrusion hole and communicating the plural grooves provided on the periphery of a rotary die in parallel with each other with the bridge groove in the first and last stages in offset positions. CONSTITUTION:A fixing coupler 25 is engaged with the periphery of a rotary die 19, and one colored wire material injection port 28 is provided to the coupler 25 in its radial direction. The first-stage groove corresponds to the injection port 28 on the periphery of the die 19 and the last-stage groove to the colored wire material extrusion hole 24, and two colored wire material annular feed grooves 29 and 30 are provided. The adjacent grooves 29 and 30 are communicated by a bridge groove 31 provided at one position in the circumferential direction. The bridge groove 31 between the succeeding groove 30 and the preceding groove 29 is shifted by 180 deg. from the hole 24 in its circumferential direction. Consequently, the spiral colored wire is extruded almost in uniform width.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an apparatus for manufacturing an elongated body with a spiral colored wire, such as a spiral colored wire and a spacer with a spiral groove.

[Prior Art] In order to store a group of optical fiber cores in an optical fiber cable in a helical state and to distinguish the group from other fiber groups, a spiral color wire and a spiral groove as shown in FIG. 5 are used. An attached spacer 1 has been proposed.

The spiral colored wire and spiral grooved spacer 1 has a structure in which a spiral colored wire 4 and a spiral groove 5 are arranged side by side on the outer periphery of a spacer body 3 which has a built-in tension member 2 in the center.

In each spiral groove 5 of the spacer 1 with spiral color wire and spiral groove of such a structure, an optical fiber core 6 having a round or rectangular cross section is housed, and on the outer periphery of the spacer body 3, although not shown, A pressure winding layer is applied, and a cable sheath is wrapped around the outer periphery of a plurality of spacers 1 having such a structure, thereby forming an optical fiber cable.

Conventionally, such a spacer 1 with a spiral color wire and a spiral groove is manufactured by fitting a fixed cover 8 to the outer periphery of a rotating die, and providing one electric wire material inlet in the radial direction in the fixed coupler. A wire material annular supply groove is provided on the outer periphery of the rotary die corresponding to the wire material inlet, and one wire material extrusion is provided in the rotary die in the radial direction corresponding to the wire material annular supply groove. The process was carried out using manufacturing equipment with a structure provided with holes.

[Problems to be Solved by the Invention] However, in such conventional manufacturing equipment, when forming the spiral colored wire and spiral groove on the outer periphery of the spacer body while rotating the rotary die, the electric wire material injection port of the fixed coupler is In the vicinity of the position where the electric wire extrusion hole of the rotating die faces, the amount of colored wire extruded from the electric wire extrusion hole is too large, and the electric wire extrusion hole of the rotating die In the vicinity of the point where is located 180 degrees away, the amount of colored wire material extruded from the wire material extrusion hole is too small, resulting in a problem that the line width of the spiral colored wire becomes non-uniform in the longitudinal direction.

An object of the present invention is to provide an apparatus for manufacturing a long body with a spiral colored line, which can make the line width of the spiral colored line substantially uniform.

[Means for Solving the Problems] To explain in detail the present invention that achieves the above object, the present invention provides a method for extruding a long body from a long body extrusion passage in a rotary die while extruding the long body from a long body extrusion passage in the rotary die in the radial direction. In an apparatus for manufacturing an elongated body with a spiral colored line, in which a colored wire is extruded from a colored line extrusion hole formed in the outer periphery of the elongated body main body to form a spiral colored line,
A fixed coupler is fitted to the outer periphery of the rotary die, and the fixed coupler is provided with a wire material injection port in the radial direction, and the first stage corresponds to the wire material injection port, and the final stage corresponds to the wire material extrusion hole. A plurality of stages of electric wire material annular supply grooves are arranged in parallel on the outer periphery of the rotary die so that they correspond to each other, and the adjacent electric wire material annular supply grooves are communicated with each other by a bridge groove, and the electric wire material at the final stage is The bridge groove between the material annular supply groove and the electric wire material annular supply groove in the preceding stage thereof is provided so as to be shifted in position in the circumferential direction with respect to the electric wire material extrusion hole.

U effect] By doing this, the colored wire material supply hole of the fixed coupler and the electric wire material extrusion hole of the rotating die do not directly oppose each other, and the path length from the color wire material supply hole to the electric wire material extrusion hole becomes long. In addition, since the direction of movement is changed by the bridge groove, the influence of pressure fluctuations in the color wire supply is eliminated, and the spiral color wire can be extruded so that its line width is approximately constant.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. This embodiment shows an example in which the present invention is applied to a manufacturing apparatus for manufacturing the spiral colored wire and spiral grooved spacer 1 described above.

The manufacturing apparatus of this embodiment has a crosshead section 8 connected to the tip of a screw extruder (not shown) through a coupler section 7. A pipe-shaped nipple holder 10 is rotatably set in the through hole 9 of the crosshead portion 8.

A chino wheel 11 is attached to the outer periphery of the proximal end of the nipple holder 10 protruding from the crosshead portion 8, and is adapted to be rotated by a chino (not shown). A tension member through hole 1 is provided at the axis of the nipple holder 10.
2 is provided.

A proximal end of a nipple 13 is connected to the distal end of the nipple holder 10. The nipple 13 is also meticulously provided with a tension member through hole 14 .

Corresponding to the tip of the nipple holder 10, a die holder accommodating chamber 15 having a circular cross section is provided in the crosshead portion 8 concentrically with respect to the nipple holder 10. A nipple holder 10 is placed inside the die holder storage chamber 15.
An annular die holder 16 is rotatably housed concentrically therewith. The nipple holder 10 and die holder 16 are engaged with each other by keys 17 protruding from a plurality of locations on the outer circumference of the nipple holder 10 and a plurality of key grooves 18 provided on the inner circumference of the die holder 16. The rotational force is transmitted to the die holder 16.

The rotary die 19 or the screw 2 is attached to the tip of the die holder 16.
The rotation of the die holder 16 rotates the rotary die 19 .

Extruded resin material supply hole 21 provided in the center of the coupler part 7
is a long body extrusion passage as a spacer extrusion passage formed continuously between the crosshead portion 8 and the nipple holder 10, between the nipple holder 10 and the die holder 16, and between the nipple 13 and the rotary die 19. It is connected to a population of 22. In the position where the key 17 is present, the elongated body extrusion passage 22 is communicated with the nipple holder 10 at a position in the circumferential direction.

A spiral groove forming part 23 is provided at the inner part of the rotary tie 19. Further, the rotary die 19 has a wire material extrusion hole 24 formed in the radial direction at one location in the circumferential direction.

A fixed coupler 25 is fitted to the outer periphery of the rotating tie 19.
The fixed coupler 25 is fixed to the tip of the crosshead portion 8 with a bolt 26 and a nut 27. The fixed coupler 25
is provided with one wire material injection port 28 in its radial direction.

Two stages of annular wire supply grooves 29 and 30 are provided on the outer periphery of the rotary die 19, with the first stage corresponding to the wire material inlet 28 and the last stage corresponding to the wire material extrusion hole 24. It is being These adjacent electric wire material annular supply grooves 29.
30 are communicated with each other through a bridge groove 31 provided at one location in the circumferential direction. In particular, the bridge groove 31 between the final electric wire annular supply groove 30 and the preceding electric wire annular supply groove 29 is 180' in the circumferential direction with respect to the electric wire extrusion hole 24.
They are located at different locations.

In addition, 32 is a bush, 33.34 is a patch, 35 is a bush, 36.37 is a patch, and 38 is a hair ring.

In the device of this embodiment, the colored wire is connected to the fixed coupler 2.
From the colored wire material supply port 28 of No. 5 to the first stage electric wire material annular supply groove 29
The colored wire 4 flows from the wire extrusion hole 24 on the opposite side to the outer periphery of the spacer body 3. Then, a spacer 1 with a spiral colored wire and a spiral groove having a cross-sectional shape as shown in FIG. 5 is obtained from a rotary die 19. In this case, the colored wire material supply hole 28 of the fixed coupler 25 and the wire material extrusion hole 24 of the rotating die 19 do not directly oppose each other, and the color wire material supply hole 28 and the wire material extrusion hole 24 of the rotary die 19 do not directly oppose each other.
Since the passage length up to 4 (and the direction of movement is changed by the bridge groove 31), the influence of pressure fluctuations in color wire supply is eliminated, and the line width of the spiral color wire 4 is almost constant. It can be extruded like this.

Note that the number of annular wire supply grooves is not limited to two, and may be three or more. In this case, the bridge grooves are provided so as to be staggered by 1800 degrees with respect to the wire extrusion holes of the final electric wire annular supply groove.

Further, in the above embodiment, an example in which one color line 4 is provided is shown, but a plurality of color lines 4 may be provided. In this case, a plurality of wire material extrusion holes are provided corresponding to the final electric wire material annular supply groove, and a bridge groove for the adjacent electric wire material annular supply groove is provided in the center between adjacent wire material extrusion holes. Please provide one.

Further, in the above embodiments, a spiral colored wire and a spiral grooved spacer are shown as the elongated body with a spiral colored wire, but the present invention is not limited thereto. When providing a spiral colored line on the outer periphery of a long body, or when providing a spiral colored line on the outer periphery of a plastic long body that does not have a spiral groove on the outer periphery and does not have a tension member etc. inside. is also applicable in the same way.

[Effects of the Invention] As explained above, the apparatus for manufacturing a long body with a spiral colored wire according to the present invention has a plurality of wire material annular supply grooves provided on the outer periphery of the rotary die, and the first stage of the wire material annular supply groove. The groove corresponds to the color wire supply hole of the fixed coupler, the final electric wire annular supply groove corresponds to the electric wire extrusion hole of the rotating die, and adjacent electric wire annular supply grooves are provided at one location in the circumferential direction. They are communicated with each other by a bridge groove, and the bridge groove between the final electric wire material annular supply groove and the preceding electric wire material annular supply groove is shifted in position in the circumferential direction with respect to the colored wire extrusion hole, so that it is fixed. The color wire supply hole of the coupler and the color wire extrusion hole of the rotary die no longer directly oppose each other, and the path length from the color wire supply hole to the color wire extrusion hole becomes longer, and the direction of movement is changed by the bridge groove. As a result, the influence of pressure fluctuations in the color wire supply is eliminated, and the spiral color wire can be extruded so that its line width remains approximately constant.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the apparatus for manufacturing a long body with a spiral colored wire according to the present invention, FIG. 2 is a plan view of a rotary die used in this embodiment, and FIG. Longitudinal sectional view of figure 4
The figure is a bottom view of the rotary die shown in FIG. 2, and FIG. 5 is a cross-sectional view showing an example of the state in which the spiral colored wire and spiral grooved spacer are used. 1... Spacer with spiral colored wire and spiral groove (elongated body with spiral colored line), 2... Tension member, 3... Spacer body (elongated body main body), 4... Spiral colored wire, 5... Spiral groove, 6... Optical fiber core wire, 7... Coupler portion, 8...
...Cross head part, 9...Through hole, 10...Nipple holder 11...Chain wheel, 12...
Tension member through hole, 13... nipple, 14...
...Tension member through hole, 15...Die holder accommodation chamber, 16...Die holder 17...Key 1
8... Key groove, 19... Rotating die, 20... Screw, 21... Extruded resin material supply hole, 22... Long body extrusion passage, 23... Spiral groove forming part, 24 ... Colored wire extrusion hole, 25 ... Fixed coupler, 26 ... Bolt,
27... Nut, 28... Color wire supply hole, 29.3
0...Electric wire material annular supply groove, 31...Bridge groove.

Claims (1)

[Claims] While extruding the elongate body from the elongate body extrusion passage in the rotary die, a colored wire is extruded to the outer periphery of the elongate body from the color line extrusion hole formed in the radial direction of the rotary die to form a spiral colored wire. In the apparatus for manufacturing a long body with a spiral colored wire, a fixed coupler is fitted to the outer periphery of the rotary die, a colored wire inlet is provided in the radial direction of the fixed coupler, and a first stage is connected to the colored wire inlet. A plurality of colored wire annular feeding grooves are arranged in parallel on the outer periphery of the rotary die so that the colored wire feeding holes correspond to each other and the final stage corresponds to the colored wire extrusion holes, and the adjacent colored wire feeding grooves are formed into bridges. The bridge grooves, which communicate with each other through a groove and which connect the color wire annular supply groove at the final stage and the color wire annular supply groove at the preceding stage, are provided with positions shifted in the circumferential direction with respect to the color wire extrusion hole. An apparatus for manufacturing a long body with a spiral colored line.