JP2002042591A - Manufacturing device for watertight insulated wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tandem manufacturing device for a watertight insulated wire, preventing the thickness of a covering of a watertight intimate mixture from being one-sided even when lengthening the land of the die of the first extrusion head for infilling the watertight intimate mixture. SOLUTION: The die of the first head for infilling the watertight intimate mixture is coupled to the nipple of the second head for covering an insulator, and in the vicinity of A coupling part, there are installed a space and a window which are adjacent to the watertight intimate mixture and communicate with the outside. A filling condition can be observed from the outside through the window.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight insulated wire manufacturing apparatus, and more particularly to a first extrusion head for filling a conductor with a watertight mixture and a second extrusion head for covering the filled conductor with an insulator. The present invention relates to a tandem-type watertight insulated wire manufacturing apparatus having an extrusion head.

[0002]

2. Description of the Related Art To manufacture a watertight insulated wire in which a conductor is filled with a watertight mixture and further covered with an insulator, the conductor is filled with the watertight mixture and further covered with the insulator with a single head. There are a common extrusion type, and a tandem type device having a head for filling a conductor with a watertight mixture and a head for covering the conductor with an insulator.

FIG. 5 shows a common extrusion type watertight insulated wire manufacturing apparatus. The extruder has a single common head 41, the common head 41 includes an inner nipple 42 for introducing the stranded conductor 1, a filling die 43 for filling the watertight mixture 2,
It comprises an extrusion die 44 for further covering the stranded conductor 1 filled with the watertight mixture 2 with the insulator 3. The inner layer nipple 42 and the filling die 43 constitute a filling head for filling the watertight mixture 2 into the stranded conductor 1. The filling die 43 also serves as an outer nipple for guiding the stranded wire conductor 1 filled with the watertight mixture 2 to the extrusion die 44, and the filling die 43 and the extrusion die 44 constitute an insulator extrusion head.

The stranded conductor 1 is guided to the inner layer nipple 42, passes through the filling die 43, and is filled with the watertight mixture 2. The stranded conductor 1 filled with the watertight mixture 2 is guided by a filling die 43 also serving as an outer layer nipple, passes through an extrusion die 44, and is covered with an insulator 3.

FIG. 4 shows a conventional tandem type watertight insulated wire manufacturing apparatus. The electric wire manufacturing apparatus includes a filling head 31 for filling the stranded wire conductor 1 with the watertight mixture 2, and an insulator extrusion head for covering the stranded wire conductor 1 filled with the watertight mixture 2 with the insulator 3. 36. Filling head 3
1 comprises an inner layer nipple 32 and a filling die 33, and an insulator extrusion head 36 comprises an outer layer nipple 37 and an extrusion die 3
Consists of eight. The inner layer nipple 32, the filling die 33, the outer layer nipple 37, and the extrusion die 38 are installed so as to have a common central axis.

A common extrusion type watertight insulated wire manufacturing apparatus is inexpensive because a single head is sufficient. However, since there is no escape path for gas generated during filling from the watertight mixture, the watertight mixture is not used. A gap is formed between the insulators, and a bump-like projection is formed on the cable at that portion. In addition, since the state of filling of the watertight mixture cannot be observed during the extrusion operation and cannot be confirmed unless the completed cable is disassembled, abnormalities are discovered and defective products cannot be avoided.

[0007] In the tandem type apparatus, since the state of filling of the watertight mixture between the first extruder (watertight mixture filling) and the second extruder (insulating coating) can be observed, an abnormality is immediately found. it can.

On the other hand, in order to sufficiently fill the watertight mixture with a tandem type apparatus, it is necessary to lengthen the land of the die of the head of the first extruder. Then, the tip of the die is lowered by its own weight, and the axis of the die is shifted from the center of the pass line, so that the thickness of the coating of the watertight mixture on the conductor is uneven.

In a tandem type watertight insulated wire manufacturing apparatus,
Extruders for filling the mixture are often of a movable type so that insulated wires other than the water-tight insulated wires that do not require filling with the water-tight mixture can be manufactured. Since the internal pressure of the head at the time of filling is high, there is a possibility that the extruder may move in the opposite direction to the extrusion due to the reaction, and it is necessary to firmly fix the extruder when attaching the extruder, and it takes time to perform centering and the like.

[0010] If the extruder for filling the admixture is of a fixed type, it does not require any trouble such as centering at the time of fixing. It is necessary to provide a device, and the equipment cost increases.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for manufacturing a tandem type watertight insulated wire, in which even if the land of a die of a first extrusion head for filling the watertight mixture is long, the watertight mixture is not required. It is an object of the present invention to provide a watertight insulated wire manufacturing apparatus in which the thickness of the coating is not uneven.

Another object of the present invention is to observe the state of filling of a watertight mixture between a first extruder (filling with a watertight mixture) and a second extruder (coating with an insulator), and to detect abnormal filling. It is an object of the present invention to provide a watertight insulated electric wire manufacturing apparatus which can be found on the spot.

[0013] The object of the present invention is further to provide an extruder for filling an admixture in a movable form so that it can be manufactured in common with insulated wires other than watertight insulated wires. It is an object of the present invention to provide a watertight insulated wire manufacturing apparatus that can easily be put out.

[0014]

In order to achieve the above object, a watertight insulated wire manufacturing apparatus according to the present invention comprises: a first extrusion head comprising a die and a nipple for filling a conductor with a watertight mixture; In a watertight insulated wire manufacturing apparatus having a second extrusion head consisting of a die and a nipple for covering a conductor filled with an admixture with an insulator, a nipple of a first head and a nipple of a second head are provided. It is connected so as to have a common center axis, and at least one of the die of the first head and the nipple of the second head is provided with a space for opening the watertight mixture filled in the conductor to the outside. I do.

[0015] To achieve the above object, the watertight insulated wire manufacturing apparatus of the present invention further comprises a first extruder having a first head composed of a die and a nipple for filling a conductor with a watertight mixture. In a watertight insulated wire manufacturing apparatus, comprising a second extruder having a second head consisting of a die and a nipple, for covering a conductor filled with a watertight mixture with an insulator, the first extruder is a first extruder. The first head die and the second head nipple are coupled so as to have a common center axis, and can be moved separately from the second extruder to form a first head die and a second head nipple. At least one is provided with a space for opening the watertight mixture filled in the conductor to the outside.

[0016]

FIG. 1 shows an embodiment of an apparatus for producing a watertight insulated wire according to the present invention. The apparatus for manufacturing a watertight insulated wire includes a filling head 11 for filling the stranded conductor 1 with the watertight mixture 2, and an insulation for covering the stranded wire conductor 1 filled with the watertight mixture 2 with the insulator 3. Body extrusion head 21
Consists of The filling head 11 comprises an inner layer nipple 12 and a filling die 13, and the insulator extrusion head 21 comprises an outer layer nipple 22 and an extrusion die 23. The filling die 13 and the outer nipple 22 are connected so as to have a common center axis. The filling die 13 is provided with a space 14 adjacent to the watertight mixture 2. The space 14 is filled with the filling die 13
Through the window 15 (see FIG. 2). The filling head 11 of the apparatus can be moved separately from the insulator extrusion head 21 together with an unillustrated admixture supply apparatus.

FIG. 2 is a sectional view taken along the line XX of FIG. 1, that is, a portion of the filling die 13 having the space 14 and the window 15.

FIG. 3 shows the space 14 and the window 15 of the filling die 13.
FIG. 4 is a partial perspective view showing a portion having a nipple 22 and an outer layer nipple 22.

Through the window 15, the watertight mixture 2 filled in the stranded conductor 1 can be observed from the outside. Outside the window 15,
For example, a video camera may be installed to continuously monitor and record the filling status. The moving image may be subjected to image processing.

The stranded conductor 1 pulled rightward in the figure by a pulling device (not shown) is guided by an inner nipple 12, passes through a filling die 13, and is a watertight mixture 2 supplied from a mixture supply device (not shown). Will be filled. The stranded conductor 1 filled with the watertight mixture 2 is guided to the outer layer nipple 22, passes through the extrusion die 23, is covered with the insulator 3 supplied from an insulator supply device (not shown), and is cooled by the outside air. When gas is generated from the watertight mixture 2 when the stranded conductor 1 is filled with the watertight mixture 2 by the filling die 13, the space 14 and the window 15
Gas is not accumulated between the watertight mixture 2 and the insulator 3, and the occurrence of bump-like bumps is prevented.

[0021]

According to the tandem type watertight insulated wire manufacturing apparatus of the present invention, even if the land of the die of the first extrusion head for filling the watertight mixture is long, the thickness of the coating of the watertight mixture is uneven. Nothing.

Further, according to the watertight insulated wire manufacturing apparatus of the present invention, the state of the filling of the watertight mixture between the first extruder (filling with the watertight mixture) and the second extruder (coating with the insulator) can be observed. Therefore, an abnormality of the filling can be found on the spot.

Further, according to the watertight insulated wire manufacturing apparatus of the present invention, even if the extruder for filling the admixture is of a movable type so that it can be manufactured in common with insulated wires other than the watertight insulated wire, The centering when fixing is easy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a watertight insulated wire manufacturing apparatus according to the present invention.

FIG. 2 is a partial sectional view of the watertight insulated wire manufacturing apparatus of the present invention.

FIG. 3 is a partial perspective view of the watertight insulated wire manufacturing apparatus of the present invention.

FIG. 4 is a sectional view of a conventional tandem type watertight insulated wire manufacturing apparatus.

FIG. 5 is a cross-sectional view of a conventional common type watertight insulated wire manufacturing apparatus.

[Explanation of symbols]

 Reference Signs List 1 stranded wire conductor 2 watertight mixture 3 insulator 11 filling head 12 inner nipple 13 filling die 14 space 15 window 21 insulator extrusion head 22 outer nipple 23 extrusion die 31 filling head 32 inner nipple 33 filling die 36 insulator extrusion Head 37 Outer layer nipple 38 Extrusion die 41 Common head 42 Inner layer nipple 43 Filling die 44 Extrusion die

Claims (4)

[Claims] 1. A first head comprising a die and a nipple for filling a conductor with a watertight mixture, and a die and a nipple for covering the conductor filled with the watertight mixture with an insulator. In a watertight insulated wire manufacturing apparatus having a second head, the die of the first head and the nipple of the second head are connected to have a common central axis, and the die of the first head and the At least one of the nipples of the second head is provided with a space for opening the watertight mixture filled in the conductor to the outside,
Watertight insulated wire manufacturing equipment. 2. The watertight insulated wire manufacturing apparatus according to claim 1, wherein the space is provided in a portion of the die of the first head adjacent to a nipple of the second head. 3. A first extruder having a first head consisting of a die and a nipple for filling a conductor with the watertight mixture, and covering the conductor filled with the watertight mixture with an insulator. A watertight insulated wire manufacturing apparatus comprising a second extruder having a second head comprising a die and a nipple, wherein the first extruder can be moved separately from the second extruder; The head die and the nipple of the second head are connected so as to have a common center axis, and at least one of the die of the first head and the nipple of the second head is filled with the conductor. Characterized by providing a space to open the watertight mixture to the outside,
Watertight insulated wire manufacturing equipment. 4. The apparatus according to claim 3, wherein the space is provided in a portion of the die of the first head adjacent to the nipple of the second head.