JPH0850828A - Electric wire covering method and apparatus utilizing vertical type cooling water tank - Google Patents

Abstract

PURPOSE:To lower the driving cost by penetrating a covered electric wire which is covered from a through hole at the lower end of a seal cylinder to the open part by hot dip coating method, cooling the electric wire, and jetting compressed air upward from a through hole of a cooling water tank. CONSTITUTION:A covered electric wire 7 at high temperature immediate after hot dip coating process is introduced to a cooling water tank 2B through a through hole 2X of a second nozzle 2M installed in the lower end part of a seal cylinder 2A positioned under the cooling water tank 2B. The electric wire 7 at high temperature introduced into the water tank 2B is cooled by water in the water pole 18 and the temperature becomes low and the electric wire 7 is led out of the water tank 2B while the covering being fixed. Attributed to the pressure, compressed air P in the cylinder 2A rushes in a communication part 2Z of a first nozzle 2K from a space between a seal cylinder side open part 2V of the nozzle 2K and the wire 7 and jets to the water tank 2B from the space of a water tank side open part 2V and the wire 7. Strong upward air current generated in the open part 2V and downward water current which are flowing out to the communication part 2Z from the same open part 2V come into collision against each other, resulting in air-tight state can be maintained stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire coating apparatus for coating a conductor by extrusion processing, and more particularly to an electric wire coating method and apparatus using a vertical cooling water tank.

[0002]

2. Description of the Related Art Heretofore, extrusion coating has been generally adopted among heat melting coatings in the electric wire coating process. This is because the thermoplastic resin is applied to the surface of the conductor in a molten state by heating,
This is cooled and solidified to form a continuous coated surface. FIG. 6 shows a side view of a conventional electric wire coating device having such a configuration.

In the electric wire coating apparatus shown in FIG. 1, the conductor 52 fed from the supply drum 51 is a capstan 53.
It is introduced into the extruder 54 through A to 53C. In the extruder 54, the thermoplastic resin charged from the hopper 54A is heated and melted, and is applied to the surface of the conductor 52 for extrusion coating. The electric wire after the coating treatment is a long horizontal cooling water tank 55 arranged on a plurality of mounts 60,
Introduced sequentially into 56, water cooled in this step to solidify and fix the coating. The covered electric wire 5 exiting the horizontal cooling water tanks 55 and 56
8 is guided to the motor 57 with a pulley via the capstans 53D to 53J and wound by the covered electric wire winder 59.

[0004]

As described above, in the conventional electric wire coating apparatus, the high temperature covered electric wire after extrusion molding is cooled by being immersed in a cooling water tank extending horizontally, that is, in the horizontal direction. However, recently, as the extrusion speed has increased, a cooling water tank having an even longer dimension has been required accordingly, so that the installation occupied area of the wire coating device increases, which causes a cost increase. Furthermore, as a result of the increased cooling distance in the horizontal direction, more powerful electric wire pulling must be performed in order to keep the electric wire stretched without slackening, and more than one capstan with a strong drive source is required, and the equipment is required. There is a drawback that the operating cost increases with the cost. In addition, as a result of the strong electric wire towing,
There is also a possibility that an unfavorable situation such as deformation of the coating portion may be caused by applying a strong force to the coating portion that has not been sufficiently cooled and fixed. However, in the case of wire harnesses for automobiles and the like, there is an increasing demand for high-mix low-volume production, but the conventional configuration has not always been suitable for frequent changes in operating conditions.

That is, although the conventional configuration of the horizontal cooling water tank is suitable for high-speed mass production of a single product,
It is difficult to suppress an increase in installation area, including equipment costs and operating costs. In addition, it is difficult to avoid deformation of the electric wire. In addition, it is difficult to change the operating conditions in response to a variety of small-volume production. Therefore, as the cooling water tank, a vertical cooling water tank that extends vertically, that is, in the vertical direction, has been studied, instead of the horizontal type that horizontally extends as in the past. However, in such a vertical cooling water tank, it is necessary to introduce the covered electric wire to be cooled from the opening at the lower end of the cooling water tank and pass it through the tank. At this time, in order to prevent the covered electric wire from being deformed during cooling, the covered electric wire has to be configured not to contact the opening wall. Therefore, if a gap is provided between the covered electric wire and the opening wall, there is a drawback that the cooling water leaks and flows out downward from this gap, which has been an obstacle to the realization of the vertical cooling water tank.

The present invention has been made in view of the above circumstances, and provides an electric wire coating device using a vertical cooling water tank capable of preventing leakage and outflow of cooling water to the lower side, thereby reducing cost and occupying installation. The objective is to reduce the area and effectively cope with the small-lot production of various products.

[0007]

In order to achieve the above object, an electric wire coating method using a vertical cooling water tank according to the present invention is an electric wire coating method in which a hot-melt coated coated electric wire is dipped in a cooling water tank for cooling. At the lower end of a cylindrical cooling water tank that stands upright and stores cooling water as a water column, a seal tube that is constantly filled with compressed air is heat-melt coated from the lower end through hole to the upper end opening. The covered electric wire, and further penetrates the covered electric wire from the opening at the lower end of the cooling water tank to the upper end of the water column for cooling, and the compressed air in the seal cylinder is jetted upward from the through hole at the lower end of the cooling water tank. It is characterized by

An electric wire coating apparatus using a vertical cooling water tank according to the present invention is a vertical cooling means having a coating processing means for coating a conductor to form a coated electric wire, and a water column for passing the coated electric wire inside. A sealing means disposed at the lower end of the vertical cooling means, an electric wire pulling and moving means for pulling and moving the conductor and the covered electric wire to the constituent members of the respective means without contact, and compression by the sealing means and the drying means. It is characterized by comprising compressed air supply means for supplying air and cooling water circulation means for circulating and supplying cooling water to the vertical cooling means.

Further, the electric wire coating apparatus using the vertical cooling water tank according to the present invention is an electric wire coating apparatus for immersing and cooling a coated electric wire which has been subjected to a heat-melt coating process in a cooling water tank. And located below the cooling water tank,
A cylindrical seal cylinder having a second nozzle having a through hole at its lower end and having a compressed air inlet, and a water tank-side opening having a diameter larger than that of the covered electric wire at its upper end, and the covering A vertical cooling water tank provided with a communication portion having a seal cylinder side opening having a diameter larger than that of an electric wire at a lower end thereof and including the cooling water tank and a first nozzle arranged between the seal cylinders is used. And

Alternatively, a plurality of cooling water outlets through which the cooling water is discharged are sequentially provided at different positions in the vertical direction on the side portion of the cooling water tank. Further, the communication portion is characterized in that it is configured by an inclined surface that gradually narrows in diameter from the seal cylinder side opening toward the upper water tank side opening. Further, the diameter of the through hole of the second nozzle is gradually reduced from the lower side to the upper side. In addition, the lower side 3 for positioning the conductor in the coated portion and positioning the coated electric wire in the vertical cooling water tank
It is characterized in that it is provided with a dimensional position defining means and an upper three-dimensional position defining means. Alternatively, a drying cylinder is arranged above the cooling water tank, a covered electric wire passing through a water column in the cooling water tank is inserted into the drying cylinder, and compressed air is fed into the drying cylinder. And

[0011]

In the electric wire coating apparatus using the vertical cooling water tank according to the present invention, the high-temperature coated electric wire immediately after the hot melt coating is first provided on the lower end portion of the seal cylinder located below the cooling water tank. From the through hole of the nozzle, it is introduced so as not to contact the wall of the nozzle. The introduced coated electric wire is then passed through the opening on the seal tube side of the first nozzle between the cooling water tank and the seal tube,
The water is introduced into the communication part so as not to come into contact with the wall, and is led out to the cooling water tank from the water tank side opening at the upper end so as not to come into contact with the wall. In this way, the high-temperature coated electric wire introduced into the cooling water tank is water-cooled to a low temperature,
It is led out of the cooling water tank with the coating fixed.

At this time, the compressed air introduced from the compressed air inlet provided in the seal cylinder is discharged from the gap between the through hole of the second nozzle provided at the lower end of the seal cylinder and the covered electric wire. Further, the compressed air in the seal cylinder enters the communication part of the first nozzle through the gap between the seal cylinder side opening of the first nozzle and the covered electric wire, and enters the cooling water tank through the gap between the water tank side opening and the covered electric wire. Try to release to. Here, the strong upward air flow generated in the water tank side opening collides with the water flow that is about to flow out from the same water tank side opening to the lower communication portion, and as a result, the strong air flow blocks the outflow of the water flow downward. Further, when the communication portion is composed of an inclined surface whose diameter gradually narrows from the seal cylinder side opening toward the upper water tank side opening, the velocity and pressure of the air flow become stronger,
Effectively blocks downward flow of water. By this action, the cooling water does not flow out or leak from the lower end of the vertical cooling water tank, and the vertical cooling water tank can be stably introduced.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, the overall structure of an electric wire coating apparatus using a vertical cooling water tank according to the present invention will be described, and its method will be described, and then the structure and operation of the vertical cooling water tank will be described in detail. FIG. 1 is a perspective view showing the overall configuration of an embodiment of an electric wire coating device using a vertical cooling water tank according to the present invention.

In FIG. 1, an electric wire coating apparatus 1 using a vertical cooling water tank is provided with an extruder 20 for extrusion coating in which a thermoplastic resin is heated and melted and applied to the surface of a conductor, and an electric wire after the coating treatment is cooled. The vertical cooling water tank 2 for solidifying and fixing the coating is provided on the mount 44. The vertical cooling water tank 2 is composed of a vertical cylindrical cooling water tank 2B and a seal cylinder 2A arranged below the cooling water tank 2B for ejecting compressed air. That is, in this embodiment, the extruder 20 is a coating processing means, and in this embodiment, the vertical cylindrical cooling water tank 2B is a vertical cooling means. Further, in the present embodiment, the seal tube 2A is the sealing means.

Further, there are rollers 8 and pulleys 9 to 11 for guiding the conductor 5 to the extruder 20, and pulleys 12 to 14 for guiding the covered electric wire 7 to the motor 15 via the vertical cooling water tank 2 and the drying cylinder 3. Prepare That is, in this embodiment, the roller 8, the pulleys 9 to 11, and the pulley 1
2 to 14 and the motor 15 constitute electric wire pulling / moving means, and the drying cylinder 3 constitutes drying means.

A pump 24 is attached to a cooling water tank 32 for supplying cooling water to the vertical cooling water tank 2, and the pump 24 is connected to the vertical cooling water tank 2 via a discharge side hose 25. The vertical cooling water tank 2 has a cooling water drain hose 28.
˜30 and a cooling water return hose 31 are connected to the cooling water tank 32. Further, the discharge side hose 25 and the cooling water drainage hoses 28 to 30 are connected via an electromagnetic valve 26.

With the above structure, the pump 24 pumps up the cooling water in the cooling water tank 32 and causes it to flow into the cooling water tank 2B of the vertical cooling water tank 2 through the discharge-side hose 25 so as to flow into the cooling water tank 2.
Form a water column in B. The overflow of the cooling water in the cooling water tank 2B is caused by the cooling water drain hoses 28 to 30 and the cooling water return hose 31 which are sequentially connected to the cooling water tank 2B in the vertical direction.
And is returned to the cooling water tank 32. A part of the cooling water returned by the cooling water drain hoses 28 to 30 is appropriately circulated to the cooling water tank 2B via the electromagnetic valve 26. Further, the cooling water tank 32 is provided with a cooler 33 (see FIG. 5), which cools the return cooling water whose temperature has risen due to the cooling of the covered electric wire to cool the cooling water in the cooling water tank 32. Keep the temperature at the specified temperature. That is, in the present embodiment, the cooling water circulating means is configured with the above-mentioned configuration.

On the other hand, the turbo blower 40 and the accumulator 41 connected to the turbo blower 40 are connected to a seal cylinder 2A provided in contact with the lower end of the cooling water tank 2B via a compressed air feed pipe 42. With the above configuration, the compressed air accumulated in the accumulator 41 by the turbo blower 40 is sent to the seal cylinder 2A via the compressed air sending pipe 42. Furthermore, a part of the compressed air is sent to the drying cylinder 3 arranged above the cooling water tank 2B, which is connected to the accumulator 41 via the dry air feeding pipe 43. That is, in the present embodiment, with the configuration described above,
A compressed air supply means is configured.

The extruder 20 melts the thermoplastic resin pellets and powders fed from the funnel-shaped hopper 21 in the melting section 22, and the molten resin is applied to the coating processing section 23 located below the vertical cooling water tank 2. send. In the coating processing section 23,
A resin in a molten state is applied to the surface of the conductor 5 fed from the supply reel 6 and sent to the vertical cooling water tank 2. The vertical cooling water tank 2 is fixed to a mount 44 by a frame 4 supporting the vertical cooling water tank 2. The pedestal 44 is mounted with all the above-described components including a switchboard 45 that supplies power to the entire apparatus, and is small and movable.

Next, the structure of the vertical cooling water tank will be described in detail. FIG. 2 is a sectional view of an example of a vertical cooling water tank of an electric wire coating device using the vertical cooling water tank according to the present invention. FIG.
FIG. 3 is a sectional view of the first nozzle of FIG. 2. In both figures,
The vertical cooling water tank 2 is a cylindrical cooling water tank 2B that has been started up.
And located below the cooling water tank 2B.
And a through-hole 2X at the lower end while being provided as an integral structure with
And a cylindrical seal cylinder 2A having a compressed air inlet 2C.

The first nozzle 2K is arranged on a shelf plate 2J which partitions the cooling water tank 2B and the seal tube 2A, and becomes compressed in a watertight state by the action of compressed air from below to above. The first nozzle 2K has a water tank side opening 2V having a diameter larger than that of the coated electric wire 7 at its upper end, and a seal cylinder side opening 2N having a diameter larger than that of the coated electric wire 7 at its lower end, a communicating portion 2Z. Equipped with. That is, the water tank side opening 2V and the seal cylinder side opening 2N are provided in a non-contact manner with the covered electric wire 7.

The cooling water tank 2B has an upper opening 2H at the upper end.
Therefore, the cooling water inlet 2D for introducing the cooling water W to the lower end side portion and the plurality of cooling water outlets 2E, 2F, 2G to which the above-described cooling water drainage hoses 28 to 30 are respectively connected are further connected. Are sequentially provided at different positions in the vertical direction. In these cooling water outlets, 2E is located at the bottom and 2G is located at the top. When any of the cooling water outlets is opened, the cooling water is supplied from the lowest cooling water outlet to the cooling water tank 2B.
It is discharged outside. Therefore, the water column 18 in the cooling water tank 2B
Water level is defined by the open cooling water outlet. With this configuration, the water column 18 having a depth suitable for the amount of heat to be removed from the covered electric wire to be cooled can be formed.

Next, the function of the vertical cooling water tank 2 will be described. The high temperature coated electric wire 7 immediately after the hot melt coating process is first separated from the through hole 2X of the second nozzle 2M provided at the lower end of the seal tube 2A located below the cooling water tank 2B so as not to come into contact with the wall thereof. Will be introduced. The introduced covered electric wire 7 is then introduced into the communication part 2Z away from the seal tube side opening 2N of the first nozzle 2K between the cooling water tank 2B and the seal tube 2A so as not to come into contact with the wall part thereof, and introduced into the communication part 2Z, and the water tank side at the upper end. Cooling water tank 2B is separated from the opening 2V so as not to contact the wall.
Be led to the side.

The high-temperature coated electric wire 7 thus introduced into the cooling water tank 2B is cooled by the water column 18 to a low temperature, and is led out of the cooling water tank 2B with the coating fixed. On the other hand, the water below the water column 18 whose temperature has risen due to the amount of heat removed from the high-temperature covered electric wire 7 moves convectively upward as a result of its small specific gravity, and instead the low temperature water above moves downward. This convection provides effective cooling.

Further, the compressed air P in the seal cylinder 2A is pushed by the pressure from the gap between the seal cylinder side opening 2N of the first nozzle 2K and the covered electric wire 7 into the communication portion 2Z of the first nozzle 2K, and the water tank side. An attempt is made to discharge the cooling water tank 2B from the gap between the opening 2V and the covered electric wire 7. Here, the strong upward air flow P1 generated in the water tank side opening 2V is the same as the water tank side opening 2V.
As a result of colliding with the water flow W1 that is about to flow to the communication portion 2Z below, this strong air flow P1 prevents the water flow W1 from flowing out. As a result, the first nozzle 2K
Becomes watertight, and this watertight state is maintained stably.

Further, as shown in FIG. 3, the communicating portion 2Z may be composed of an inclined surface 2S whose diameter gradually decreases from the seal tube side opening 2N to the upper water tank side opening 2V. When the communication portion 2Z is configured in this way, the upper water tank side opening 2 is formed.
The velocity of the air flow P1 at V is increased, making it possible to prevent the downward flow of the water flow W1 more effectively.
The through hole 2X of the second nozzle 2M of the seal cylinder 2A can also be configured so that the diameter thereof is gradually reduced from the lower side to the upper side similarly to this. With such a configuration of the through hole 2X, the pressure loss at the outlet of the compressed air P increases, and the compressed air P is prevented from flowing out. As a result, the inflow of compressed air P1 into the first nozzle 2K increases,
The watertight effect can be further improved.

With the above-described structure, the electric wire coating apparatus using the vertical cooling water tank according to the present invention uses the vertical cooling water tank because the cooling water does not flow out or leak from the lower end of the vertical cooling water tank. And stable operation is possible.
The configurations of the above-mentioned means for forming the electric wire coating device according to the present invention are merely examples, and the present invention is not limited to the above configurations.

As a specific configuration, when the coated electric wire 7 having an outer diameter of 1.2 to 2.5 mm is used, the inner diameter of the water tank side opening 2V of the first nozzle 2K is set to φ5, and the inside of the water tank is The coated electric wire 7 was operated at a linear velocity of 100 to 140 m / min and the air pressure inside the seal tube 2A was 0.5 to 1.0 kg / cm ^{2 and} could be suitably operated. In the above structure, the coated electric wire 7 coated with the thermoplastic resin and introduced into the vertical cooling water tank 2 is provided at a temperature of 200 ° C.
The temperature of the cooling water in B can be set to 15 ° C., and the temperature of the covered electric wire 7 sent out from the vertical cooling water tank 2 can be secured at 50 ° C. for electric wire processing. In addition, the covered electric wire 7 is 2.6-
When using an outer diameter of 3.5 mm, the first nozzle 2K
A preferable result was obtained by setting the inner diameter of the water tank side opening 2V of 10 to 10 and the other conditions being the same as above.

FIG. 4 is an explanatory view of the electric wire processing step in the electric wire coating apparatus using the vertical cooling water tank of FIG. In the figure, the conductor 5 unrolled from the supply reel 6 passes through the roller 8 and the pulleys 9 to 11 and the extruder 2
In the coating processing section 0, the surface is coated with a molten thermoplastic resin and is sent to the vertical cooling water tank 2.

The vertical cooling water tank 2 cools the coated electric wire with water to solidify and fix the coating, and introduces the coated electric wire 7 into the drying cylinder 3. The covered electric wire dried in the drying cylinder 3 is
It is guided to the motor 15 via the pulleys 12 to 14 and housed in the covered electric wire housing can 16. That is, the switchboard 45
Motor 15 driven by wiring 15A connected to
However, the entire electric wire is being moved. Here, by the pulley 11 which is the lower side three-dimensional position defining means of the conductor 5 and the pulley 12 which is the upper side three-dimensional position defining means of the covered electric wire 7, the conductor 5 is positioned in the coated portion 23 and the vertical cooling water tank. Positioning of the covered electric wire 7 in 2 is performed. With this configuration, it is possible to avoid contact with the wall portions of the conductor 5 and the covered electric wire 7.

FIG. 5 is an explanatory view of fluid inflow and outflow to and from the cooling water tank in the electric wire coating apparatus using the vertical cooling water tank of FIG. In the figure, the pump 24 pumps up the cooling water in the cooling water tank 32 by the pump hose 34, and makes it flow into the cooling water tank 2B of the vertical cooling water tank 2 through the discharge side hose 25 and the cooling water inlet 2D, and then in the cooling water tank 2B. Form a water column. The overflow is due to the cooling water outlets 2E to 2G, the cooling water drainage hoses 28 to 30, and the cooling water return hose 31.
And is returned to the cooling water tank 32. Cooling water tank 3
The cooler 33 provided in No. 2 cools the return cooling water whose temperature has risen due to the cooling of the covered electric wire to keep the cooling water temperature in the cooling water tank 32 at a predetermined temperature.

The compressed air is accumulated in the accumulator 41 by the turbo blower 40, passes through the compressed air feed pipe 42 and the compressed air inlet 2C, and is fed into the seal cylinder 2A provided in contact with the lower end of the cooling water tank 2B. Further, a part of the compressed air passes through the dry air inlet pipe 43,
It is fed into the drying cylinder 3 arranged above the cooling water tank 2B. In the drying cylinder 3, water droplets on the surface of the covered electric wire in a state where the dry air is still wet are blown off to remove water and dry. With the above configuration, it is possible to perform electric wire coating processing based on stable operation of the vertical cooling water tank. In the above embodiment, it is desirable that at least the first nozzle is provided with a structure that can be freely exchanged according to the thickness of the conductor to be coated, since versatility is obtained.

[0033]

As described above, the wire coating method and apparatus using the vertical cooling water tank according to the present invention has the high-temperature coated wire immediately after the hot melt coating process at the lower end of the seal tube below the cooling water tank. It is introduced from the through hole of the second nozzle provided so that it does not come into contact with the wall portion, and then from the opening of the first nozzle between the cooling water tank and the seal tube on the seal tube side into the communication section so that it does not contact the wall section, From the opening on the side of the water tank, lead out to the side of the cooling water tank so as not to contact the wall.

At this time, the pressure of the compressed air in the seal tube enters the communication part of the first nozzle from the gap between the opening on the seal tube side of the first nozzle and the covered electric wire, and the compressed air in the water tank side opens on the covered electric wire. Attempt to discharge from the void into the cooling water tank. Here, the strong upward airflow generated in the water tank side opening collides with the water flow that tries to flow out from the same water tank side opening to the lower communication part, and as a result, this strong airflow blocks the downward flow of the water flow. Is.

If the communicating portion is formed by an inclined surface that gradually narrows in diameter from the seal cylinder side opening toward the upper water tank side opening, the velocity and pressure of the air flow become stronger, and the downward direction of the water flow. Effectively prevent the outflow to. INDUSTRIAL APPLICABILITY According to the present invention, it is possible to prevent downward leakage and outflow of cooling water, which enables stable operation of a vertical cooling water tank, and at the same time, reduces equipment cost and operation cost, and easily changes operating conditions to produce a wide variety of small quantities It is possible to provide an electric wire coating device that can effectively cope with the above, can save the installation area, and can be easily moved. Moreover, since the electric wire is towed and moved vertically in the vertical direction, in addition to the reduction of the operating cost, the electric wire is not deformed, the product quality is excellent, and the quality control cost can be significantly reduced. Therefore, the industrial effect is extremely large.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an electric wire coating device using a vertical cooling water tank according to the present invention.

FIG. 2 is a cross-sectional view of an example of a vertical cooling water tank of an electric wire coating device using the vertical cooling water tank according to the present invention.

3 is a cross-sectional view of the first nozzle of FIG.

FIG. 4 is an explanatory view of an electric wire processing step in an electric wire coating device using the vertical cooling water tank of FIG. 1.

5 is an explanatory view of fluid inflow and outflow to and from a cooling water tank in an electric wire coating device using the vertical cooling water tank of FIG.

FIG. 6 is an overall side view of an electric wire coating device using a conventional horizontal cooling water tank.

[Explanation of symbols]

 1 Electric Wire Covering Device 2 Vertical Cooling Water Tank 2A Sealing Tube 2B Cooling Water Tank 2C Compressed Air Inlet 2D Cooling Water Inlet 2E to 2G Cooling Water Outlet 2H Upper Opening 2J Shelf Board 2K First Nozzle 2M Second Nozzle 2N Sealing Tube Side Opening 2V Water Tank Side opening 2X Through hole 2Z Communication part 7 Coated electric wire 18 Water column W Cooling water P Compressed air

Claims (8)

[Claims] 1. A wire coating method for immersing a heat-melt-coated coated wire in a cooling water tank for cooling, wherein the standing wire is arranged at the lower end of a cylindrical cooling water tank in which cooling water is stored as a water column. Sealed tube that is constantly filled with compressed air penetrates the covered electric wire that has been subjected to heat fusion coating from the through hole at the lower end to the opening at the upper end, and further penetrates the covered electric wire from the opening at the lower end of the cooling water tank to the upper end of the water column for cooling. Then
The electric wire coating method using a vertical cooling water tank, wherein the compressed air in the seal cylinder is jetted upward from the through hole at the lower end of the cooling water tank. 2. A covering processing means for covering a conductor to form a covered electric wire, a vertical cooling means having therein a water column for passing the covered electric wire, and a seal arranged at a lower end of the vertical cooling means. Means, and an electric wire pulling and moving means for pulling and moving the conductor and the covered electric wire to the constituent members of the respective means without contact,
An electric wire using a vertical cooling water tank, which comprises compressed air supply means for supplying compressed air to the sealing means and drying means, and cooling water circulation means for circulating cooling water to the vertical cooling means. Coating equipment. 3. A wire coating device for immersing and cooling a coated electric wire coated by hot melt coating in a cooling water tank, and a tubular cooling water tank which has been started up, and which is located below the cooling water tank.
A cylindrical seal cylinder having a second nozzle having a through hole at its lower end and having a compressed air inlet, and a water tank-side opening having a diameter larger than that of the covered electric wire at its upper end, and the covering It is preferable to use a vertical cooling water tank provided with a communication portion having a seal cylinder side opening having a diameter larger than that of an electric wire at a lower end thereof, and including the cooling water tank and a first nozzle arranged between the seal cylinders. An electric wire coating device using a characteristic vertical cooling water tank. 4. The vertical cooling system according to claim 2, wherein a plurality of cooling water outlets for discharging the cooling water are provided at different positions in a vertical direction on a side portion of the cooling water tank. Electric wire coating device using a water tank. 5. The vertical cooling water tank according to claim 2, wherein the communication portion is formed of an inclined surface whose diameter gradually decreases from the seal cylinder side opening toward the upper water tank side opening. Wire coating device using. 6. The wire coating device using a vertical cooling water tank according to claim 2, wherein the diameter of the through hole of the second nozzle is gradually reduced from the lower side to the upper side. . 7. A lower-side three-dimensional position defining means and an upper-side three-dimensional position defining means for positioning a conductor in a coated portion and positioning a coated electric wire in a vertical cooling water tank. An electric wire coating device using the vertical cooling water tank according to claim 2. 8. A structure in which a drying cylinder is disposed above the cooling water tank, a covered electric wire passing through a water column in the cooling water tank is inserted into the drying cylinder, and compressed air is fed into the drying cylinder. The electric wire coating device using the vertical cooling water tank according to any one of claims 2 to 6.