JP4967285B2 - Covered wire cooling water tank - Google Patents

Description

The present invention relates to a covered electric wire cooling water tank .

  Conventionally, the electric wire covering method includes at least a core wire supplying step, a step of feeding the supplied core wire downstream, a step of covering the core wire with a molten synthetic resin, a step of taking up the treated covered electric wire, The step of cooling the wire and the step of winding the cooled covered electric wire are performed on a single production line.

Moreover, in the conventional electric wire coating | coated apparatus, the core wire drawn | fed out from the supplier for core wire supply is introduce | transduced into a horizontal type extruder. In the horizontal extruder, the injected thermoplastic resin is heated and melted, and a coating is formed on the surface of the core wire with this resin. The coated electric wire after the treatment is introduced into a long horizontal cooling water tank, and is cooled by water in this process to solidify and fix the coating. The covered electric wire exiting the horizontal cooling water tank is configured to be wound up by a covered electric wire take-out device via a storage line portion composed of a plurality of pulleys. The storage section is referred to as an accumulator device, and is used to temporarily absorb an imbalance between the supply amount of the electric wire and the drawing amount. A conventional storage section is configured to reciprocate a plurality of times between a plurality of pulley groups that move in the separation direction or in the proximity direction and store in this process (see FIG. 7 of Patent Document 1). ).
JP-A-8-153428

As described above, in the conventional wire coating machine, the high-temperature coated wire after extrusion molding is immersed in a horizontal, that is, a cooling water tank extending in the horizontal direction, horizontally moved in the horizontal direction, and cooled. However, recently, as the extrusion speed has increased, a longer cooling water tank has been required, and accordingly, the installation area of the wire coating machine has increased, causing an increase in cost. In addition, as a result of the extended cooling distance in the horizontal direction, a more powerful wire pulling must be performed in order to continue tensioning without damaging the wires, and a capstan with a strong drive source is required, along with the operating costs along with the equipment costs. There was also a drawback of increasing. In addition, as a result of the above-described strong wire pulling, an unfavorable situation of deformation of the covering portion may be caused by applying a strong force to the covering portion that is not sufficiently cooled and fixed.
Further, as a result of the structure in which the storage line extends in the horizontal direction, the installation area tends to increase as well.

The present invention solves such problems and disadvantages in the prior art. The purpose of the present invention is to improve the cooling method in the cooling water tank so that the cooling time of the covered electric wire in the cooling water tank can be increased. It aims at providing the cooling water tank of the covered electric wire which can reduce an installation area length and can perform electric wire covering with high efficiency.

In order to solve the above-mentioned problems, the specific invention includes at least a supplier 10 for supplying a core wire, a feeder 20 for feeding the supplied core wire downstream, a tensioner for tensioning the core wire, and a supplied core wire. An electric wire covering device 50 for coating with a molten synthetic resin, a cooling water tank 100 for cooling the covered electric wire, a take-up machine 80 for taking up the cooled covered electric wire, and a winder 150 for taking up the cooled covered electric wire. Is a cooling water tank 100 used in an electric wire coating machine provided with an electric wire coating production line in which at least are arranged,
In the cooling water tank 100, a pair of pulleys 101 and 102 are wound so that a high-temperature coated electric wire immediately after the core wire is coated with a molten synthetic resin is spirally wound a plurality of times so as to continuously run. The pulleys 101 and 102 are arranged at intervals, with the axis thereof being horizontal across the traveling direction of the covered wire,
Of the pair of pulleys 101, 102, at least a part of one pulley 101 located near the wire covering device 50 is submerged in the cooling water, and a part of the other pulley 102 is located on the cooling water surface. In addition, a traveling path for the covered wire to travel repeatedly between the cooling water stored in the cooling water tank 100 and the outside air is formed between the pair of pulleys 101 and 102, and a pair of -Before winding the high-temperature coated electric wire immediately after the core wire is covered with the melted synthetic resin between the wires 101 and 102 in a spiral manner, the coated electric wire is placed on the outer circumferential surface of the cooling water tank 100. A pre-cooling device 103 for contacting the cooling water and pre-cooling is provided in the cooling water tank 100,
The preliminary cooling device 103 is wound around the pulley 102 on the outer peripheral surface of the flange 104 for cooling the covered wire and the other pulley 102 located on the downstream end side of the flange 104 near the wire covering device 50. A spray nozzle 105 for spraying and cooling the cooling water on the spot is provided,
In the cooling water tank 100 used for the wire coating machine configured to cool the covered electric wire traveling in the rod 104 with the cooling water flowing in the rod 104 ,
The other pulley 102 located on the downstream end side of the flange 104 has a large-diameter portion 106 that receives the covered wire coming out from the downstream end side of the flange 104 at the same height as the flange 104, and the large-diameter portion 106 And one pulley 101 located near the wire covering device 50 and the small diameter portion 107 of the other pulley 102 have the same diameter, and the axis of the other pulley 102 is Covered wire cooling, characterized in that it is positioned higher than the axis of one pulley 101, and that the covered wire can travel across the water surface between the small-diameter portion 107 of the one pulley 101 and the other pulley 102 while being inclined. It is a tank.

In the first aspect of the invention, at least a supplier 10 for supplying a core wire, a feeder 20 for feeding the supplied core wire downstream, a tensioner for applying tension to the core wire, and a supplied core wire are melt-synthesized. There are at least an electric wire covering device 50 for covering with a resin, a cooling water tank 100 for cooling the covered electric wire, a take-up machine 80 for taking up the cooled covered electric wire, and a winder 150 for taking up the cooled covered electric wire. In the cooling water tank 100 used for an electric wire coating machine provided with an electric wire coating production line arranged,
In the cooling water tank 100, a pair of pulleys 101 and 102 are wound so that a high-temperature coated electric wire immediately after the core wire is coated with a molten synthetic resin is spirally wound a plurality of times so as to continuously run. The pulleys 101 and 102 are arranged at intervals, with the axis thereof being horizontal across the traveling direction of the covered wire,
Of the pair of pulleys 101, 102, at least a part of one pulley 101 located near the wire covering device 50 is submerged in the cooling water, and a part of the other pulley 102 is located on the cooling water surface. In addition, a traveling path for the covered wire to travel repeatedly between the cooling water stored in the cooling water tank 100 and the outside air is formed between the pair of pulleys 101 and 102, and a pair of -Before winding the high-temperature coated electric wire immediately after the core wire is covered with the melted synthetic resin between the wires 101 and 102 in a spiral manner, the coated electric wire is placed on the outer circumferential surface of the cooling water tank 100. A pre-cooling device 103 for contacting the cooling water and pre-cooling is provided in the cooling water tank 100,
The preliminary cooling device 103 is wound around the pulley 102 on the outer peripheral surface of the flange 104 for cooling the covered wire and the other pulley 102 located on the downstream end side of the flange 104 near the wire covering device 50. A spray nozzle 105 for spraying and cooling the cooling water on the spot is provided,
In the cooling water tank 100 used for the wire coating machine configured to cool the covered electric wire traveling in the rod 104 with the cooling water flowing in the rod 104 ,
The other pulley 102 located on the downstream end side of the flange 104 has a large-diameter portion 106 that receives the covered wire coming out from the downstream end side of the flange 104 at the same height as the flange 104, and the large-diameter portion 106 And one pulley 101 located near the wire covering device 50 and the small diameter portion 107 of the other pulley 102 have the same diameter, and the axis of the other pulley 102 is By being positioned higher than the axis of one pulley 101 and being able to travel while the inclined wire crosses the water surface between the small diameter portion 107 of the one pulley 101 and the other pulley 102,
After the core wire is covered with the molten synthetic resin, when cooling the covered electric wire, the cooling water in the cooling water stored in the cooling water tank and the cooling water accompanying the contact with the outside air on the surface of the cooling water The latent heat cooling action by evaporation can be applied to the coated electric wire being transferred at least once, and it can be cooled to a predetermined temperature. As a result, the cooling time of the coated electric wire in the cooling water tank can be increased, and the installation area of the electric wire coating machine It can reduce the length and perform highly efficient wire coating.

A typical embodiment of the invention of the cooling water tank according to claim 1 will be described. In FIG. 1 and FIG. 2, the wire coating production line in the wire coating machine B is formed in a plane U-shape or U-shape, and the first line 40 that is a core wire supply line and the first line 40 are substantially in parallel. The second line 160 is connected to the first line 40 and the supply direction thereof is different by 180 degrees. The supplier 10 for supplying the core wire, the feeder 20 for feeding the supplied core wire A downstream, and the preheater 30 for preheating the core wire A are on the same first line 40 in this order from upstream to downstream. Is arranged over. An electric wire coating device 50 for coating the supplied core wire with a molten synthetic resin, a ring marking device 60, a roll marking device 70, an external shape measuring device 90, a cooling water tank 100, a take-up device 80, an accumulator device 110, a biasing device The lead detector 120, the spark tester 130, the measuring instrument 140, and the winder 150 are arranged on the second line 160 in this order from upstream to downstream. The accumulator device 110 is disposed behind the cooling water tank 100. Further, the external shape measuring machine 90 is provided on the side wall of the cooling water tank 100. A tensioner 170 that tensions the core wire A that is transported across the preheater 30 that is the most downstream device in the first line 40 and the wire coating device 50 that is the most upstream device in the second line 160 is the first line. 40 and the second line 160. Thus, the wire coating machine B is configured.
The wire coating production line may be formed in a straight line.

3 and 4, in the cooling water tank 100, a high-temperature coated electric wire immediately after the core wire is covered with a molten synthetic resin is wound in a spiral shape between a pair of pulleys 101 and 102 a plurality of times. The pair of pulleys 101 and 102 are arranged at intervals so that the axes of the pair of pulleys 101 and 102 cross the running direction of the covered electric wire and are horizontal. Of the pair of pulleys 101 and 102, at least a part of one pulley 101 located near the outer shape measuring device 90 is submerged in the cooling water, and a part of the other pulley 102 is located on the cooling water surface. And the structure which cools the covered electric wire during driving | running | working by the latent heat action by the contact water cooling in the cooling water stored in the cooling water tank 100 during this driving | running | working and evaporation of the cooling water accompanying contact with external air It is as.
That is, a traveling path for the covered wire to travel repeatedly between the cooling water stored in the cooling water tank 100 and the outside air is formed between the pair of pulleys 101 and 102.
For example, one pulley 101 located closer to the wire covering device 50, that is, closer to the outer shape measuring device 90 is half-immersed in the cooling water, and more than two-thirds of the other pulley 102 is on the cooling water surface. To position.

  Before the coated wire in a high temperature state immediately after the core wire is covered with the molten synthetic resin between the pair of pulleys 101 and 102 is spirally wound a plurality of times, the coated wire is placed on the water surface of the cooling water tank 100. A pre-cooling device 103 that is brought into contact with the cooling water on its outer peripheral surface and pre-cools is provided in the cooling water tank 100.

The preliminary cooling device 103 is provided on the outer peripheral surface of the other pulley 102 which is positioned on the downstream end side of the flange 104 on the downstream side of the flange 104, and the winding around the pulley 102. and a spray nozzle 105 for spraying cooling water to the portions cool and configured to cool the coated electric wire traveling the gutter 104 by the cooling water flowing through the trough 104.
The flange 104 is U-shaped in cross section, and the height of receiving the covered electric wire is the same as the height of the covered electric wire carried out from the outer shape measuring device 90. A cooling water supply nozzle 109 is provided at the entrance of the flange 104. The tip of is arranged toward the bottom surface of the ridge.

The other pulley 102 located on the downstream end side of the flange 104 has a large-diameter portion 106 that receives the covered wire coming out from the downstream end side of the flange 104 at the same height as the flange 104, and the large-diameter portion 106 one concentric small diameter portion 107, one pulley 101 located near the contour measuring machine 90 and the small diameter portion 107 of the other pulley 102 have the same diameter, the axis of the other pulley 102 is the axis It is positioned higher than the axis of one pulley 101, and the covered electric wire can run between the small diameter portion 107 of the one pulley 101 and the other pulley 102 while crossing the water surface.

  The pair of pulleys 101 and 102 are pivotally supported in the cooling water tank 100 so that they can be rotated by the take-up force of the take-up machine 80 or the take-up force of the winder 150.

  The cooling water tank 100 is provided with an airbrush device 108 for blowing air to the cooled covered electric wire to remove adhering water and taking outside air into the cooling water tank 100.

  A water level adjusting device 180 that maintains a constant water level in the cooling water tank 100 is provided. The water level adjusting device 180 includes an overflow pipe 181 that is slidable in a vertical axis direction that sets the water level of the cooling water tank 100 to a desired height, and an upper end of the overflow pipe 181 is positioned in the cooling water tank 100. The lower end of the drainage tank 182 is located at the lower limit water level position, and the drainage pump 183 is connected to the drainage tank 182. The side wall of the drainage tank 182 is located at the upper limit water level position. A second overflow portion 184 is provided. The upper surface of the cooling water tank 100 is left open, or when the upper surface is closed, the space on the water surface is preferably ventilated and slightly negative pressure to promote evaporation.

The operation of the cooling water tank 100 configured as described above will be described.
The core wire supplying process by the supplier 10 for supplying the core wire, the process of feeding the supplied core wire A by the feeder 20 downstream, and the process of preheating the core wire by the preheater 30 are performed on the same first line 40. Perform in order from upstream to downstream. Next, a tensioner 170 applies tension to the core wire A that is transported across the preheater 30 that is the most downstream device in the first line 40 and the wire covering device 50 that is the most upstream device in the second line 160. . In the second line 160, the step of coating the periphery of the core wire A supplied to the wire coating apparatus 50 in the tensioned state with the molten synthetic resin by the one extruder 51 and the cross die head, and as necessary Accordingly, the step of coloring the whole or part of the outer peripheral surface of the covered electric wire by the other extruder 52, and the step of marking the diameter, manufacturer name, etc. of the electric wire in the circumferential direction of the covered electric wire by the ring marking device 60 A step of marking a product number or the like in the longitudinal direction of the covered electric wire by the roll marking device 70, an outer shape measuring step by the outer shape measuring device 90, a step of cooling the covered electric wire by the cooling water tank 100, and the take-up device 80. A take-off step, a step of storing the cooled covered electric wire by the accumulator device 110, and the eccentricity detector; The first step includes the step of detecting the eccentricity by 20, the spark test step by the spark tester 130, the length measuring step by the measuring instrument 140, and the step of winding the cooled covered electric wire by the winder 150. It is performed in this order from upstream to downstream on the second line 160, which is substantially parallel to the line 40 and is connected to the first line 40 and whose direction is different by 180 degrees.

  When the coated wire is cooled after the core wire is coated with the molten synthetic resin, the water cooling in the cooling water stored in the cooling water tank 100 and the cooling accompanying the contact with the outside air on the water surface of the cooling water. A latent heat cooling action by evaporation of water is applied to the coated electric wire being transferred at least once to cool to a desired temperature.

More specifically, the cooling process of the covered wire performed between the step of coating the core wire with the melted synthetic resin and the step of winding the cooled covered wire is performed between the pair of pulleys 101 and 102. The coated wire in a high temperature state immediately after coating the core wire with the melted synthetic resin is wound in a spiral shape a plurality of times, and a part of the one pulley 101 is stored in the cooling water tank 100 together with the coated wire. So that it is cooled by contacting with the cooling water, evaporating the cooling water due to the latent heat action that is attached to the surface of the cooling water by contacting the covered electric wire wet with the cooling water with the outside air, and by this latent heat action. Cool the covered wire while traveling to the desired temperature.
Therefore, the cooling water tank 100 narrower than the conventional example can be sufficiently cooled, and the temperature rise of the cooling water is suppressed to some extent by the latent heat of vaporization.

An outer shape of the covered electric wire is provided on the side wall of the cooling water tank 100 before the high-temperature covered electric wire immediately after the core wire is covered with the molten synthetic resin between the pair of pulleys 101 and 102 is spirally wound a plurality of times. After the measurement by the outer shape measuring device 90, the covered electric wire is supplied to the cooling water tank 100, and the covered electric wire is brought into contact with the cooling water on the outer peripheral surface thereof by the preliminary cooling device 103 on the water surface of the cooling water tank 100. , Precool.
That is, in the cooling water flowing in the flange 104 near the outer shape measuring step , the covered electric wire traveling in the rod 104 is cooled, and on the outer peripheral surface of the other pulley 102 located on the downstream end side of the rod 104. Then, cooling water is sprayed from the spray nozzle 105 to the winding portion around the other pulley 102 and cooled.

Of the pair of pulleys 101 and 102, one pulley 101 located near the outer shape measuring step is at least half immersed in the cooling water, and the other pulley 102 is positioned on the cooling water surface. In the meantime, the covered electric wire is wound in a spiral shape a plurality of times and continuously run to perform the cooling.
At this time, the water level of the cooling water tank 100 is set to a desired position in which one pulley 101 located near the outer shape measuring step is at least half immersed in the cooling water and the other pulley 102 is located on the cooling water surface. In addition, the water level adjusting device 180 is adjusted and maintained.
That is, the overflow pipe 181 of the water level adjusting device 180 is slid in the vertical axis direction, and is fixed at a position where the water level of the cooling water tank 100 becomes a desired height. Accordingly, when the water level is exceeded due to the spraying of the cooling water, excess cooling water in the cooling water tank 100 flows in from the upper end of the overflow pipe 181 and flows from the lower end of the overflow pipe 181 to the previous cooling water drain tank. When the water level in the drainage tank 182 exceeds the upper limit water level position, excess cooling water is also discharged from the second overflow portion 183. Drained.

The covered electric wire coming out from the downstream end side of the flange 104 is received by the surface of the large diameter portion 106 of the other pulley 102 positioned at the same height as the flange 104, and then the pulley 101 positioned near the take-up process and the pulley 101 The continuous running is performed between the small-diameter portions 107 of the other pulley 102.
The pair of pulleys 101 and 102 are rotated by a take-up force in the take-up step or a take-up force in the cooled covered electric wire take-up step.

  Air is blown onto the cooled covered electric wire by the air brush 108 to remove adhering moisture, and outside air is taken into the cooling water tank 100.

  It is a schematic plan view of embodiment of an electric wire coating machine.   It is a schematic front view of FIG.   It is a schematic front view of embodiment of a cooling water tank.   It is an enlarged plan view of the water level adjusting device in FIG.

DESCRIPTION OF SYMBOLS 10 Supplier 20 for supplying core wire Feeder 30 Preheating machine 50 Electric wire coating device 60 Ring marking device 70 Roll marking device 80 Take-out device 90 Outline measuring device 100 Cooling water tank 101, 102 Pulle 103 Precooling device 104 樋 105 Spreading nozzle 106 Large diameter portion 107 Small diameter portion 108 Air brush device 109 Cooling water supply nozzle 110 Accumulator device 120 Eccentricity detector 130 Spark tester 140 Measuring machine 150 Winding machine 170 Tensioner 180 Water level adjusting device

Claims (1)

At least a supplier 10 for supplying a core wire, a feeder 20 for feeding the supplied core wire downstream, a tensioner for applying tension to the core wire, and an electric wire coating apparatus for coating the supplied core wire with a molten synthetic resin 50, a cooling water tank 100 that cools the covered electric wire, a take-up machine 80 that takes up the cooled covered electric wire, and a winder 150 that winds up the cooled covered electric wire. In the cooling water tank 100 used for the electric wire coating machine provided,
In the cooling water tank 100, a pair of pulleys 101 and 102 are wound so that a high-temperature coated electric wire immediately after the core wire is coated with a molten synthetic resin is spirally wound a plurality of times so as to continuously run. The pulleys 101 and 102 are arranged at intervals, with the axis thereof being horizontal across the traveling direction of the covered wire,
Of the pair of pulleys 101, 102, at least a part of one pulley 101 located near the wire covering device 50 is submerged in the cooling water, and a part of the other pulley 102 is located on the cooling water surface. In addition, a traveling path for the covered wire to travel repeatedly between the cooling water stored in the cooling water tank 100 and the outside air is formed between the pair of pulleys 101 and 102, and a pair of -Before winding the high-temperature coated electric wire immediately after the core wire is covered with the melted synthetic resin between the wires 101 and 102 in a spiral manner, the coated electric wire is placed on the outer circumferential surface of the cooling water tank 100. A pre-cooling device 103 for contacting the cooling water and pre-cooling is provided in the cooling water tank 100,
The preliminary cooling device 103 is wound around the pulley 102 on the outer peripheral surface of the flange 104 for cooling the covered wire and the other pulley 102 located on the downstream end side of the flange 104 near the wire covering device 50. A spray nozzle 105 for spraying and cooling the cooling water on the spot is provided,
In the cooling water tank 100 for use in construction the wire coating machine to cool the coated electric wire traveling the gutter 104 by the cooling water flowing through the gutter 104,
The other pulley 102 located on the downstream end side of the flange 104 has a large-diameter portion 106 that receives the covered wire coming out from the downstream end side of the flange 104 at the same height as the flange 104, and the large-diameter portion 106 And one pulley 101 located near the wire covering device 50 and the small diameter portion 107 of the other pulley 102 have the same diameter, and the axis of the other pulley 102 is Covered wire cooling, characterized in that it is positioned higher than the axis of one pulley 101, and that the covered wire can travel across the water surface between the small-diameter portion 107 of the one pulley 101 and the other pulley 102 while being inclined. Aquarium.

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