JP2006120381A - Device for cooling linear object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear-shape material cooling device, in which the cooling speed of a linear object can be increased to shorten a linear object traveling distance required for cooling in comparison to a conventional distance when such a traveling high-temperature linear object as a coated wire after resin-coated is cooled down in cooling water, thereby making the device that is compact in size and reduce the installation area. <P>SOLUTION: A linear material cooling device, in which a linear material is resin-coated by an extruder 41 and a traveling high-temperature linear-shape material 42 after resin-coated is cooled down in cooling water comprises a reservoir tank 21 that reserves the cooling water, and allows the linear-shape material 42 to travel in the cooling water; and water spray nozzles 22 that are provided in the reservoir tank 21 for spraying water in the cooling water, with a predetermined gap along the traveling direction of the linear material 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a linear object cooling device that cools a traveling high-temperature linear object in cooling water, and is particularly suitable for manufacturing a resin-coated linear object such as a covered electric wire. The present invention relates to an object cooling device.

  An electric wire coating apparatus for producing a wire, for example, a covered electric wire, applies a resin coating to the core wire while running the core wire, cools the hot coated electric wire that is coated with the resin, and winds the cooled covered electric wire. It is what I did. Such an electric wire coating apparatus is equipped with a cooling device that cools the hot coated electric wire that travels after the resin coating in order to cool and cure (solidify and cool and solidify) the resin coating applied by the extruder. Yes.

  2. Description of the Related Art Conventionally, a covered wire cooling device is generally configured to cool a hot covered wire after resin coating by an extruder by immersing it in cooling water in a horizontally extending cooling water tank (water storage tank). In addition, the temperature of the resin coating after resin coating by an extruder is usually 150 to 300 ° C., and if the resin coating is, for example, PVC (polyvinyl chloride), the value is around 180 ° C.

However, in the conventional coated wire cooling device constituted by the cooling water tank (water storage tank), the high-temperature covered electric wire is simply made to travel in the cooling water in the cooling water tank. Since the cooling rate is slow, there is a drawback in that a long cooling water tank that requires a long traveling distance of the covered electric wire is required and a large installation space is required.
Japanese Patent No. 2951379 (FIGS. 1 and 6)

  Therefore, an object of the present invention is to increase the cooling rate for the linear object, such as a coated electric wire after resin coating, in cooling water when cooling it, so that it can be cooled compared to the prior art. An object of the present invention is to provide a linear object cooling device that can shorten the travel distance of a linear object to reduce the size of the apparatus and save the installation area.

  In order to solve the above problems, the present invention takes the following technical means.

  The invention of claim 1 is a linear object cooling device that cools a traveling high-temperature linear object in cooling water, and stores the cooling water and allows the linear object to pass therethrough, and in the storage tank. A linear object cooling comprising: a plurality of water jet nozzles that are provided at intervals along the linear object traveling direction and that injects water toward the linear object in the cooling water. Device.

  The invention according to claim 2 is a linear object cooling device that is resin-coated by an extruder and cools a traveling high-temperature linear object in the cooling water after the resin coating, in which the cooling water is stored and the linear A water storage tank through which an object passes, and a water injection nozzle that is provided in the water storage tank at intervals along the linear object traveling direction and injects water toward the linear object in the cooling water. It is a linear object cooling device characterized by comprising.

  According to a third aspect of the present invention, in the linear object cooling device according to the first or second aspect, the water injection nozzles are arranged to face each other so as to sandwich the linear object traveling path.

  The linear object cooling device of the present invention is a water storage tank in which a high-temperature linear object such as a coated electric wire after resin coating is guided and travels in cooling water, along the linear object traveling path from the upstream side to the downstream side. A plurality of water jet nozzles are provided, which are provided at intervals, and inject water toward the linear object in the cooling water. Therefore, the cooling water in the water storage tank is agitated by the water flow generated by the water jet nozzle jetting water, thereby continuously introducing a new cooling water flow to the surface of the linear object traveling in the cooling water. As a result, the heat exchange between the linear object and the cooling water can be efficiently performed and the cooling rate for the linear object can be increased as compared with the conventional apparatus that does not include the water injection nozzle. Thereby, compared with the conventional apparatus, the linear object travel distance required for cooling to desired temperature can be shortened, and the apparatus can be made compact and the installation area can be saved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view schematically showing a configuration of a linear object cooling device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of a pre-cooling unit in FIG. 1, and FIG. 3 is a main cooling unit in FIG. It is BB sectional drawing of.

  As shown in FIGS. 1 to 3, the linear object cooling device of the present embodiment is provided in a coated electric wire production line and is resin-coated by an extruder 41, and the high-temperature coated electric wire 42 that travels after this resin coating is run. The pre-cooling unit 10 through which the high-temperature coated electric wire 42 from the extruder 41 passes, and the pre-cooling unit 10 are installed at a position between the extruder 41 and a take-out machine (not shown). And a main cooling section 20 through which the covered covered electric wire 42 passes. A water storage tank 21 of the main cooling unit 20 is connected to the water receiving tank 11 of the pre-cooling unit 10.

  The pre-cooling unit 10 has a box-shaped water receiving tank 11 with a lid that can be opened on the upper side, a predetermined interval from the upstream side to the downstream side in the traveling direction of the covered electric wire 42 in the water receiving tank 11, and A plurality of mist spray nozzles (mist spray nozzles) 12 provided in a state of being opposed to each other so as to sandwich the traveling path of the covered electric wire 42, and cooling water from these mist spray nozzles 12 in a conical shape in a mist state. A cooling water supply pipe 13 for supplying cooling water to each mist injection nozzle 12 for injection is provided.

  Further, the main cooling unit 20 has a box shape with a lid that can be opened on the upper side, stores the cooling water, and moves the covered electric wire 42 in the water storage tank 21 for running the covered electric wire 42 in the cooling water. A plurality of water injection nozzles that are provided in a state of being opposed to each other with a predetermined interval from the upstream side to the downstream side along the direction and sandwiching the traveling path of the covered electric wire 42, 22 and a pressurized water supply pipe 23 for supplying pressurized water to these water jet nozzles 22.

  The water receiving tank end plate 11a of the water receiving tank 11 is provided with a U-shaped notch opening (not shown) so that the covered electric wire 42 can pass therethrough. Moreover, the U-shaped notch opening (illustration omitted) is provided also in the shared partition wall 30 of the water receiving tank 11 and the water storage tank 21, and the water storage tank end plate 21a so that the covered electric wire 42 can pass. Cooling water in the water storage tank 21 spills from the U-shaped cutout opening of the common partition wall 30 and the U-shaped cutout opening of the water storage tank end plate 21a. Cooling water is supplied through 22 to keep the water level constant. A drain container and a drain pipe (not shown) for returning and circulating the cooling water from the water tank 21 are provided below the water tank end plate 21a of the water tank 21. In addition, a drain container (not shown) and a cooling water jetted in a mist state from the mist jet nozzle 12 and a cooling water from the U-shaped notch opening of the common partition wall 30 are returned below the water receiving tank 11. A drain pipe is provided.

  In the linear object cooling device configured as described above, the high-temperature covered electric wire 42 traveling from the extruder 41 first enters the water receiving tank 11 and passes through the water receiving tank 11 to each mist injection. The cooling water is spread in a cone shape in a mist state and sprayed evenly by the nozzle 12, thereby cooling to a predetermined temperature and curing thereof.

  The covered electric wire 42 immediately enters the water storage tank 21 after leaving the water receiving tank 11. While passing through the water storage tank 21, the cooling water in the water storage tank 21 is actively agitated by the water flow generated toward the covered electric wire 42 by jetting water from each water jet nozzle 22. A new cooling water flow is continuously introduced and brought into contact with the surface of the covered electric wire 42 traveling in the cooling water. Thereby, compared with the case where the water injection nozzle 22 is not provided, the heat exchange between the covered electric wire 42 and the cooling water can be efficiently performed, and the cooling rate for the covered electric wire 42 can be increased. Even if the length of the wire is shorter than the conventional length, the covered electric wire 42 is cooled to a predetermined temperature while passing through the water storage tank 21, and is cured so as not to cause deformation of the cross-sectional shape during winding. Can do.

  Next, since it compared with the apparatus which is not equipped with the water injection nozzle 22 in the water storage tank 21, this is demonstrated. FIG. 5 is a plan view schematically showing the configuration of the linear object cooling device of the comparative example, and FIG. 6 is a CC cross-sectional view of the main cooling unit in FIG. Here, in this comparative example, the same parts as those in the apparatus shown in FIG. That is, as shown in FIGS. 5 and 6, the difference from the apparatus of the above embodiment is that, in the comparative example, no water injection nozzle is provided in the water storage tank 21 of the main cooling unit 20 ′. . The water storage tank 21 is poured with a water supply pipe (not shown).

  In both the embodiment and the comparative example, the length of the water receiving tank 11 in the covered wire traveling direction: 1.5 m, the length of the water storage tank 21 in the covered wire traveling direction: 3 m, and a φ1.0 mm copper wire from the extruder The coated electric wire having a diameter of 1.6 mm coated with a resin was passed at a running speed of 600 m / min for cooling. In the apparatus of the embodiment, the interval between the mist injection nozzles 12 in the covered electric wire traveling direction is 70 mm (the same applies to the comparative example), and the interval between the water injection nozzles 22 in the covered electric wire traveling direction is 70 mm. As a result, in the comparative example, the coiled wire is wound through a take-up machine without being cooled to a predetermined temperature. Therefore, as shown in FIG. Crushed and deformed.

  On the other hand, according to the apparatus of the embodiment, since the resin coating is sufficiently cooled and cured by cooling to a predetermined temperature, a coated electric wire having a circular cross section without deformation is obtained as shown in FIG. It was.

  Note that the linear object cooling device shown in FIG. 1 can also be applied to cooling a wire manufactured by continuous casting, and the resin-coated steel used for manufacturing a resin-coated steel wire, for example, other than electric wires. It is also applicable to wire cooling.

It is a top view which shows roughly the structure of the linear object cooling device by one Embodiment of this invention. It is AA sectional drawing of the pre-cooling part in FIG. It is BB sectional drawing of the main cooling part in FIG. FIG. 4 is a diagram according to the present invention, and is a diagram for explaining a cross-sectional shape of the wound covered electric wire. It is a top view which shows roughly the structure of the linear object cooling device of a comparative example. It is CC sectional drawing of the main cooling part in FIG. It is a figure which concerns on a comparative example, Comprising: It is a figure for demonstrating the cross-sectional shape of the wound covered electric wire.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Pre-cooling part 11 ... Water receiving tank 12 ... Mist injection nozzle 13 ... Cooling water supply pipe 20 ... Main cooling part 21 ... Water storage tank 22 ... Water injection nozzle 23 ... Pressurized water supply pipe 30 ... Shared partition wall 41 ... Extruder 42 ... Sheathed wire

Claims (3)

  In a linear object cooling device that cools a traveling high-temperature linear object in cooling water, the cooling water is stored, and a water storage tank that allows the linear object to pass therethrough, and a linear object traveling direction in the storage tank. A linear object cooling device, comprising: a plurality of water injection nozzles that are provided at intervals along the line and inject water toward the linear object in the cooling water.   In a linear object cooling apparatus that is resin-coated by an extruder and cools a traveling high-temperature linear object after the resin coating in cooling water, a water storage tank that stores the cooling water and allows the linear object to pass therethrough; The water storage tank includes a plurality of water spray nozzles that are provided at intervals along the linear object traveling direction and that injects water toward the linear object in the cooling water. Linear object cooling device.   The linear object cooling device according to claim 1, wherein the water injection nozzles are arranged to face each other so as to sandwich the linear object traveling path.

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