JP5962536B2 - Manufacturing method of water-bridged wire - Google Patents

Description

The present invention, silane cross wires and the like, relates to manufacturing technology of wire to be water crosslinking.

  Patent Document 1 discloses a technique for water-crosslinking an extruded product of a water-crosslinkable silane-modified polyolefin composition. In Patent Document 1, the extrusion-molded product is hydrocrosslinked in a hot water tank while being wound around a drum. The drum has a hollow cylinder as a core and disks attached to both ends of the cylinder, and through holes are formed in the cylinder and the disk.

JP-A-7-329074

  However, in the drum disclosed in Patent Document 1, water is only supplied to the inside of the extruded product through the through-hole in a state where the extruded product is wound around the drum. For this reason, the supply of water to the inside of the extrusion molded product wound around the drum becomes partial, and sufficient water is supplied evenly to the inside of the extrusion molded product, particularly the extrusion molded product tightly wound. It ’s difficult.

Then, an object of this invention is to enable it to supply sufficient water more evenly with respect to the electric wire wound around the drum.

In order to solve the above problem, a method for producing a water-bridged electric wire according to a first aspect includes: (a) a step of winding only an electric wire around a drum; and (b) a water is applied to the electric wire during the step (a). And in the inner region of the electric wire wound around the drum, in a state where water is present on the surface of the electric wire or the gap between the electric wires, and (c) the electric wire on the drum. A step of water-crosslinking the electric wire wound around the drum while supplying water existing on the surface of the electric wire or in the gap between the electric wires to the wound inner region .

The second aspect is a method for producing a water-bridged electric wire according to the first aspect, wherein the step (b) is a step of continuously attaching water to the electric wire wound around the drum. ing.

A 3rd aspect is a manufacturing method of the water bridge | crosslinking electric wire which concerns on a 1st or 2nd aspect, Comprising: The said process (b) attaches water with respect to the part already wound around the said drum among the said electric wires. It is a process to make it.

According to a first aspect, in the course of winding the wire in the drum, since the water is adhered to the wire, with the wire wound around the drum, adhering water to the inside of the wire. For this reason, sufficient water can be supplied more evenly to the electric wire wound around the drum.

According to the 2nd aspect, since water adheres continuously with respect to the electric wire wound around the said drum, sufficient water can be supplied more evenly with respect to the electric wire wound around the drum.

According to a third aspect, since the water was adhered to with respect to the winding already part to the drum of the electric wire, easy to be maintained state water wire is attached, with respect to wound the wire into the drum Sufficient water can be supplied evenly and reliably.

It is a schematic perspective view which shows an electric wire. It is a schematic perspective view which shows a drum. It is explanatory drawing which shows the process example which supplies water, winding an electric wire around a drum. It is explanatory drawing which shows the example of the presence aspect of the water in the electric wire wound around the drum. It is explanatory drawing which shows the water bridge | crosslinking process example. It is explanatory drawing which shows the modification which supplies water, winding an electric wire around a drum. It is explanatory drawing which shows the other modification which supplies water, winding an electric wire around a drum. It is explanatory drawing which shows the further another modification which supplies water, winding an electric wire around a drum. It is explanatory drawing which shows the operation | movement relationship between the electric wire guide and nozzle in the modification same as the above.

  Hereinafter, the manufacturing method of the water-bridge long object which concerns on embodiment is demonstrated.

<Production target>
An electric wire which is an example of a long object to be manufactured will be described. FIG. 1 is a schematic perspective view showing the electric wire 10. The electric wire 10 includes a core wire 12 and a covering portion 14. In addition to the electric wires, the object to be manufactured may be a tube, a resin string member, or the like.

  The core wire 12 is a linear member made of a metal such as copper, a copper alloy, aluminum, or an aluminum alloy. The core wire 12 may be configured by a single wire or may be configured by twisting a plurality of strands.

  The covering portion 14 is a resin that covers the outer periphery of the core wire 12, and is configured by a resin that is water-crosslinked (here, silane-crosslinked). Specifically, the outer periphery of the core wire 12 is extrusion-coated with a silane-crosslinkable molten resin or the like. As the silane-crosslinkable resin, a resin containing a base resin such as polyolefin, a silane compound such as organic silane, and other additives can be used.

  When the silane-crosslinkable resin comes into contact with water, it causes a silane crosslinking reaction to become a silane-crosslinking resin. At this time, silane crosslinking is promoted in an atmosphere higher than room temperature.

  By covering the core wire 12 with the silane-crosslinkable resin that is extrusion-coated on the core wire 12 as described above, the coating portion 14 composed of the silane-crosslinked resin is formed.

  Note that a plurality of coating layers are formed on the electric wire 10, a part (particularly, the outermost layer) of which is a silane cross-linked resin, and the remaining part may not be a silane cross-linked resin.

<Manufacturing method>
A method for manufacturing the electric wire 10 will be described.

  First, an electric wire 10 (having a covering portion before cross-linking) as a long object is wound around a drum 20 as shown in FIG.

  The drum 20 having the following configuration can be used. That is, the drum 20 includes a winding core portion 24 and a pair of overhang portions 26.

  The winding core portion 24 is configured so that the electric wire 10 can be wound around the outer periphery thereof. Here, the core part 24 is formed in a cylindrical shape. The inside of the core part 24 may be hollow (that is, a cylindrical shape) or may be buried. Here, the core part 24 is formed in a cylindrical shape. Further, a rotation stop recess 24 a is formed in the inner peripheral portion of the core portion 24. And when inserting the rotating shaft part 34 mentioned later, the protrusion formed in the said rotating shaft part 34 fits in the said rotation stop recessed part 24a. Thereby, the relative rotation stop of the rotating shaft part 34 and the drum 20 is achieved. The core part may have a configuration in which a plurality of rod-like members are arranged and fixed so as to draw a cylinder. Moreover, the core part may be formed in prismatic shape etc.

  The pair of overhang portions 26 are attached to both end portions of the core portion 24 so as to protrude toward the outer periphery, and the electric wire 10 wound around the core portion 24 is connected to both ends of the core portion 24. It suppresses from the side, and plays the role which suppresses that the electric wire 10 collapse | crumbles outside the edge part of the core part 24. FIG. Here, the overhang portion 26 is formed in a disk shape having a diameter larger than the diameter of the core portion 24, and the center axis of the core portion 24 and the center of the overhang portion 26 are aligned with each other. , And fixed to the end of the core 24. The overhang portion 26 may have a square plate shape or the like.

  The overhanging portion 26 is formed with a through hole 27 penetrating both main surfaces. With this through-hole 27, water is also supplied from the outside to the portion of the electric wire 10 wound around the core portion 24 that comes into contact with the overhang portion 26. But this through-hole 27 is not essential and may be abbreviate | omitted.

  The drum 20 is made of metal such as stainless steel, wood, resin, or the like. In terms of excellent heat resistance and water resistance, the drum 20 is preferably made of stainless steel.

  Winding of the electric wire 10 around the drum 20 can be performed using, for example, a winding device 30 as shown in FIG.

  That is, the winding device 30 includes a base base 31, a pair of support shaft portions 32, a rotation shaft portion 34, and a rotation drive portion 36.

  A pair of support shaft portions 32 are erected on the base table 31. An interval in which the drum 20 can be disposed is provided between the pair of support shaft portions 32.

  The rotation shaft portion 34 is rotatably supported by the pair of support shaft portions 32. The rotating shaft portion 34 is inserted into the core portion 24 of the drum 20 and supports the drum 20 so as to be rotatable in a state in which the rotating shaft portion 34 cannot rotate relative to the drum 20.

  A rotation drive unit 36 is provided on the outer portion of one of the support shafts 32. The rotation drive unit 36 includes a motor or the like, and the rotation driving force of the motor is transmitted to the rotation shaft unit 34. The rotating shaft of the motor and the rotating shaft portion 34 may be directly connected, or may be connected via a gear, an annular chain, a transmission belt, or the like. Further, the configuration in which the rotation driving unit rotates the drum is not limited to the above example. For example, a rotating body that can be rotated by the rotation driving unit is pressed against the outer peripheral portion of the overhanging portion of the drum, and the rotation driving force of the rotating body is transmitted to the drum through the overhanging portion to rotate the drum. May be.

  In addition, in order to make it the structure which can insert the rotating shaft part 34 in the core part 24 of the drum 20, it is good to make the other spindle part 32 into a retractable type, for example. Further, the rotating shaft portion may be supported in a cantilever manner by one supporting shaft portion, and the free end of the rotating shaft portion may be inserted into the core portion of the drum.

  The drum 20 is set in the winding device 30 so that the rotary shaft portion 34 is inserted into the core portion 24 of the drum 20, and one end of the electric wire 10 is placed on the outer peripheral portion of the core portion 24 of the drum 20. Install it so that it cannot rotate relative to it. In this state, when the rotary shaft portion 34 and the drum 20 are rotated by the rotation driving portion 36, the electric wire 10 is wound around the core portion 24. In addition, the electric wire 10 after extrusion coating and before water crosslinking may be wound and accommodated in another drum, or may be directly supplied from an extrusion coating apparatus or the like.

  As described above, a process of attaching water to the electric wire 10 is performed in the middle of winding the electric wire 10 around the drum 20. Here, water is continuously attached to the electric wire 10 wound around the drum 20. Moreover, water is made to adhere to the portion of the electric wire 10 that has been wound around the drum 20.

  More specifically, water is applied to the electric wire 10 in the middle of winding by applying water from the outside around the core portion 24 of the drum 20 set in the winding device 30. Here, the supply port at one end of the hose 40 is disposed on the side of the core 24, obliquely above or above in a posture directed to the core 24 of the drum 20 set in the winding device 30. Has been. The other end of the hose 40 is connected to a water supply source.

  Then, water is continuously supplied from the supply port of the hose 40 while the drum 20 is continuously rotated. Then, the electric wire 10 supplied continuously is wound around the drum 20 sequentially. When the electric wire 10 is wound around the core portion 24 of the drum 20, water is applied to the outer peripheral portion of the electric wire 10 wound around the core portion 24. Thereby, water adheres centering on the outermost peripheral part of the electric wire 10 wound around the winding core part 24. Furthermore, when the drum 20 rotates, the electric wire 10 is further wound around the outer periphery of the wound electric wire 10. Similarly, the water from the hose 40 is supplied to the wire 10 wound later, and the water adheres thereto. In this manner, water can be continuously attached to the wire 10 wound around the core 24.

  In addition, it is preferable that water is supplied evenly for each winding layer with respect to the electric wire 10 wound around the core part 24.

  When the winding of the electric wire 10 around the drum 20 is completed, the supply of water from the hose 40 is stopped. In the state where the winding of the electric wire 10 around the drum 20 is finished, when an intermediate portion between the start and end of winding of the electric wire 10 wound around the drum 20 is observed, the winding is performed so as to gather densely as shown in FIG. It will be in the state where the water W exists in the location of either the surface of the attached electric wire 10, and the clearance gap between the electric wires 10. FIG.

  Next, the electric wire 10 wound around the drum 20 is subjected to water crosslinking (silane crosslinking). In this process, for example, as shown in FIG. 5, the drum 20 around which the electric wire 10 is wound is accommodated in a sealed cage 60, and high-temperature steam is supplied from the steam supply unit 62 or the like into the cage 60. This can be done by supplying

  In this tub 60, sufficient water is supplied to the outer peripheral side region of the electric wire 10 wound around the drum 20 by the water vapor introduced into the tub 60. Moreover, the water which exists in the surface of the electric wire 10 or the clearance gap between the electric wires 10 is supplied enough and evenly with respect to the internal area wound around the drum 20 among the electric wires 10. Furthermore, water by water vapor is supplied through the through hole 27 to a region near the protruding portion 26 of the electric wire 10 wound around the drum 20. For this reason, a sufficient amount of water can be supplied evenly to the entire electric wire 10 wound around the drum 20.

  Moreover, since the electric wire 10 is heated in the coffin 60 by the water vapor introduced into the coffin 60, the silane crosslinking reaction is promoted. In particular, by keeping the inside of the cage 60 at 100 degrees or more, evaporation of water existing on the surface of the electric wire 10 or the gap between the electric wires 10 is promoted, and sufficient water can be supplied evenly by the entire electric wire 10.

  As a result, the overall cross-linking degree of the electric wire 10 wound around the drum 20 can be increased evenly, and a high-quality electric wire can be manufactured stably.

  According to the manufacturing method of the electric wire 10 configured as described above, water is attached to the electric wire 10 while the electric wire 10 is being wound around the drum 20, so that the electric wire 10 is wound around the drum 20. Water also adheres to the electric wire 10 inside. For this reason, sufficient water can be supplied evenly to the electric wire 10 wound around the drum 20. As a result, the overall cross-linking degree of the electric wire 10 wound around the drum 20 can be increased evenly, and a high-quality electric wire can be manufactured stably.

  Moreover, since sufficient water can be supplied to the inside of the electric wire 10 wound around the drum 20, even if the amount of the electric wire 10 wound around the drum 20 is increased, the crosslinking reaction can be sufficiently promoted to the inside. it can. Thereby, the longer electric wire 10 can be bridged in a single step, and productivity can be improved.

  Moreover, since water adheres continuously with respect to the electric wire 10 wound around the drum 20, the water can be reliably attached to the entire inside of the electric wire 10 wound around the drum 20. Thereby, sufficient water can be supplied more evenly to the electric wire 10 wound around the drum 20.

  However, it is not essential to continuously attach water to the electric wire 10 wound around the drum 20. In the middle of winding the electric wire 10 around the drum 20, water may be supplied only once to attach the water to the electric wire 10. You may make it make water adhere at a location. This is because even in these cases, water can be attached to the inside of the electric wire 10 wound around the drum 20.

  Moreover, since water is made to adhere with respect to the part already wound around the core part 24 of the drum 20 among the electric wires 10, the water adhering to the electric wires 10 is hard to shake off, and water adheres to the electric wires 10. This is easy to maintain. For this reason, sufficient water can be supplied to the electric wire 10 wound around the drum 20 more reliably and evenly.

  However, as shown in FIG. 6, water may be attached to the portion of the electric wire 10 before being wound around the drum 20 by applying water from the hose 40 or the like. Even in this case, since the electric wire 10 is wound around the drum 20 in a state where at least a part of the water adhering to the electric wire 10 remains attached to the electric wire 10, Can supply enough water evenly.

<Other variations>
In the modification shown in FIG. 7, the example which provided the spray nozzle 42 in the front-end | tip part of the hose 40 in the example shown in FIG. 3 is shown. The spray range of the spray nozzle 42 is preferably set to a range in which water can be supplied to the electric wire 10 wound around the core portion 24 over the entire longitudinal direction of the core portion 24.

  According to this modification, wetting of the surroundings can be suppressed by suppressing supply of excess water.

  In the winding device 130 according to the modified example shown in FIG. 8, in the example shown in FIG. The parallel winding mechanism unit 46 includes an electric wire guide 47 and an electric wire guide moving mechanism unit 48. The electric wire guide 47 is configured to be able to guide the travel route of the electric wire 10, and is configured by, for example, an annular member or a U-shaped member through which the electric wire 10 can be inserted. The wire guide moving mechanism 48 is constituted by a linear motor or the like, and reciprocates the wire guide 47 in a section between the pair of overhanging portions 26 in the direction along the axial direction of the core portion 24. It is configured as follows.

  When the electric wire 10 is passed through the electric wire guide 47 and the electric wire guide 47 is driven to reciprocate while rotating the drum 20, the electric wire 10 is guided to reciprocate along the axial direction of the core portion 24, and the core portion 24. It will be wound around. As a result, the electric wire 10 is wound in parallel in a state of being aligned with the core portion 24.

  The winding device 130 is provided with a water supply nozzle 44 and a nozzle moving mechanism 45. The nozzle 44 is connected to a water supply source through a hose, and is configured to be able to supply water from the tip portion thereof. The nozzle 44 is in a posture facing the core part 24. Further, the supply range of water from the nozzle 44 is limited as compared with the case shown in FIG. 3, and the water from the nozzle 44 is supplied to the core portion 24 of the electric wire 10 wound around the core portion 24. It is supplied to a part of the range in the axial direction. The nozzle moving mechanism unit 45 is configured by a linear motor or the like, and is configured to reciprocate the nozzle 44 in a section between the pair of overhanging portions 26 in a direction along the axial direction of the core portion 24. ing.

  FIG. 9 is a diagram showing the relationship between the movement operation of the wire guide 47 and the movement operation of the nozzle 44. That is, the nozzle moving mechanism unit 45 moves the nozzle 44 so that the nozzle 44 moves following the wire guide 47. Thereby, when the electric wire 10 is wound around the core portion 24 of the drum 20, the nozzle 44 pours water on the portion of the electric wire 10 after being wound around the core portion 24. Thereby, water can be more reliably adhered to the electric wire 10 wound around the drum 20. Moreover, since water is partially supplied with respect to the electric wire 10, supply of excess water is suppressed and surrounding wetting can be suppressed.

  In addition, each structure demonstrated in the said embodiment and each modification can be suitably combined unless it mutually contradicts.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Electric wire 14 Coating | covering part 20 Drum 30,130 Winding apparatus 40 Hose 42 Fog nozzle 44 Nozzle 60 ６２ 62 Steam supply part

Claims (3)

(a) a step of winding only an electric wire around the drum;
(b) in the course of the step (a), the said wire to adhere the water, in the inner region which is wound on the drum of the electric wire, water is present on the surface or gaps of the wire of the wire A process of making a state ;
(c) While supplying the water existing on the surface of the electric wire or the gap between the electric wires to the inner region of the electric wire wound around the drum, the electric wire wound around the drum is water-bridged And a process of
A method for producing a water-bridged electric wire comprising : A method for producing a water-bridged electric wire according to claim 1,
The method (b) is a method for producing a water-bridged electric wire , which is a step of continuously attaching water to the electric wire wound around the drum. A method for producing a water-bridged electric wire according to claim 1 or 2,
The step (b) is a method for producing a water-bridged electric wire , which is a step of attaching water to a portion of the electric wire that has been wound around the drum.

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