JP5075215B2 - Equipment for applying the coating agent to the wire - Google Patents

Description

  The present invention relates to a coating apparatus and a coating method for coating a volatile coating agent on a long material such as a wire.

  When the resin is coated on several strands, for example, a twisted wire made of steel strands, an application agent, for example, an adhesive or a primer, is applied to the entire circumference of the outer periphery of the twisted wire, and the twisted wire and the resin are applied. It is often adhesively fixed. In order to apply the adhesive to the outer periphery of the steel stranded wire, the roller 2 is immersed in an adhesive tank 1 filled with the adhesive 3 as shown in FIG. 5 and the stranded wire 4 is pressed on the outer peripheral surface of the roller 2. An apparatus is used in which the adhesive 3 is applied to the stranded wire 4 by moving it in the direction of the arrow and continuously bringing the adhesive 3 into contact with the stranded wire 4. FIG. 5 is a perspective view showing the configuration of a conventional coating apparatus for coating agent on a wire. Such a coating apparatus supplies a fixed amount of the adhesive 3 to the bonding tank 1 and includes an adhesive circulation path to be collected, and stores the fixed amount of the adhesive 3 in the bonding tank 1.

  In general, the adhesive contains an organic solvent. When an adhesive containing a highly volatile organic solvent is applied to steel strands, the organic solvent of the adhesive in the adhesive tank volatilizes and the viscosity of the adhesive increases with the operating time in such an application device. In addition, the amount of adhesion (film thickness) on the outer peripheral surface of the stranded wire varies.

  On the other hand, Patent Document 1 discloses that a bottom portion having a guide hole having substantially the same shape as the outer periphery shape of the elongated object having a substantially constant cross-sectional shape, and coaxial with the guide hole and on one side of the bottom portion. A cylindrical coating part having an application hole larger than the provided guide hole, an adhesive supply hole opening in the application hole, and a supply part for supplying an adhesive to the supply hole of the application part. An application device is described in which an object to be coated is guided in a guide hole of an application part, moves in the application hole, and is applied with an adhesive supplied from a supply hole.

  In Patent Document 2, the first paint supplied from the first paint tank and the second paint supplied from the second paint tank are mixed into two liquids by a mixer and supplied to the paint tank. A paint die is connected to the paint tank via a tube, the wire passes through a hole in the tube, is introduced into the paint die, and the paint supplied to the paint tank flows in the tube based on its own weight. A coating device is described which descends and is continuously fed to a coating die and applied to the surface of the wire by the coating die.

Japanese Utility Model Publication No. 62-99377 (FIGS. 1 and 2) JP 2008-173625 A (FIG. 2)

In the apparatus of Patent Document 1 described above, when applying to a long material having a complicated cross-sectional shape such as a stranded wire obtained by twisting a plurality of steel wires, that is, a wire, an adhesive is applied to the outer periphery of the coating hole and the wire. There is a case where the adhesive does not spread and the adhesive drips (uncoated part) in the circumferential direction and the axial direction of the wire. Moreover, in the apparatus of patent document 2 mentioned above, in order to supply a coating material, the upper end of the coating material tank is opening. When an adhesive made of a highly volatile organic solvent is used, the organic solvent of the adhesive may volatilize and a skin (film made of a resin component) may be formed on the opening.
The present invention has been made to solve the above-described problems, and even a wire having a complicated cross-sectional shape such as a steel stranded wire is attached to the entire circumference of the outer periphery while suppressing alteration. Thus, a coating apparatus and a coating method for a coating agent on a wire that can adjust the film thickness of the deposited coating agent are obtained.

An apparatus for applying a coating agent to a wire according to the present invention includes an inlet-side guide having a guide hole through which a wire passes and an outlet-side guide having a guide hole through which the wire passes. A cylindrical tank having an immersion hole for adhering the coating agent to the wire to be applied, a coating agent tank, a gear pump for feeding the coating agent from the coating agent tank to the cylindrical tank through a pipe, and a close contact with the cylindrical tank, The inlet side guide has an adjustment hole for adjusting the film thickness of the coating agent attached to the wire, and has an adjustment die for passing the wire to which the coating agent is attached, so that the coating agent is retained in the immersion hole. The diameter of the guide hole is smaller than the diameter of the immersion hole, and the diameter of the guide hole of the outlet side guide is smaller than the diameter of the immersion hole, and the guide hole of the inlet side guide and the cylinder Immersion hole in the vessel and the outlet side guide A guide hole of the property adjustment hole and is coaxial of the adjusting die, the immersion hole of the cylindrical vessel, the coating agent is pumped supplied from the gear pump, the longitudinal direction of the immersion hole which the wire passes Is supplied and filled from a plurality of supply holes provided at a distance from each other, the wire is introduced from the guide hole of the inlet side guide, passes through the immersion hole of the cylindrical tank, and the wire to which the coating agent is attached, The film thickness of the coating agent, which is led out from the guide hole of the outlet side guide and adheres to the wire through the adjustment hole when passing through the adjustment hole, is adjusted.

According to the apparatus for applying the coating agent to the wire according to the present invention, the diameter of the guide hole of the inlet-side guide is smaller than the diameter of the immersion hole so that the coating agent stays in the immersion hole, and the outlet The diameter of the guide hole of the side guide is smaller than the diameter of the immersion hole, the guide hole of the inlet side guide, the immersion hole of the cylindrical tank, the guide hole of the outlet side guide, and the adjustment Since the adjustment hole of the die is on the same axis, the coating agent staying in the immersion hole is prevented from touching the outside air, and the coating agent can be adhered over the entire circumference of the outer periphery of the wire. The film thickness of the applied coating agent can be adjusted. Further, the immersion agent of the cylindrical tank is supplied and filled with the coating agent fed by pressure from the gear pump through a plurality of supply holes provided in the longitudinal direction of the immersion hole through which the wire passes. is there.

It is a perspective view which shows the structure in the coating device of the coating agent to the wire concerning Embodiment 1 of this invention. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is a perspective view which shows the structure in the coating device of the coating agent to the conventional wire.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a configuration of a coating apparatus for coating a wire material according to Embodiment 1 of the present invention, and an adhesive tank is shown in perspective. 2 is a cross-sectional view taken along line AA in FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along the line CC of FIG. In the embodiment, a volatile adhesive will be described as an example of a volatile coating agent. In the figure, a guide roller 12 has a pair of horizontal rollers and a pair of vertical rollers, and guides a wire 11 such as a steel stranded wire to a cylindrical tank 13. The cylindrical tank 13 is in close contact with the cylindrical tank body 14, the inlet side guide plate 16 that is in close contact with the cylindrical tank body 14 with the sealing material 15 interposed therebetween, and the sealing material 17. The outlet side guide plate 18 and the valve 20 that opens and closes the pipe 19 to which the adhesive is supplied are configured. The valve 20 can be opened and closed by air drive. The inlet side guide plate 16, the cylindrical tank main body 14, and the outlet side guide plate 18 may be integrally configured by combining them without interposing a sealant. The cylindrical tank body 14 has a circular cross section, and has a dipping hole 21 for temporarily retaining a highly volatile adhesive, dipping the wire passing through the inside, and adhering the adhesive. Yes. Further, the cylindrical tank body 14 has a U-shaped cross section and is formed with buffer holes 22 surrounding the three side surfaces of the immersion hole 21. (See FIG. 4).

  The adhesive supplied from the pipe 19 through the valve 20 is introduced into the buffer hole 22 through the valve hole 23 and filled into the buffer hole 22. Further, the adhesive is introduced from the buffer hole 22 through the supply hole 24 into the immersion hole 21. The supply holes 24 for introducing the adhesive from the buffer holes 22 to the immersion holes 21 are arranged at three locations (left and right side surfaces and lower side surfaces) spaced substantially equidistantly in the circumferential direction in the circle of the cross section in the short direction of the immersion holes 21. Provided (see FIG. 3). Thus, the adhesive is supplied relatively evenly in the circumferential direction of the circle of the cross section in the short direction of the immersion hole 21. The group of supply holes 24 formed at the three positions is provided at a plurality of positions in the longitudinal direction of the immersion hole 21 and at four positions shown in FIG. Reference numeral 25 denotes a stopcock. The cylindrical tank body 14 and the valve 20 are made of a stainless material having excellent solvent resistance.

  The inlet side guide plate 16 is in close contact with the cylindrical tank body 14 with the sealing material 15 interposed therebetween, and a guide hole 26 is formed. The diameter of the guide hole 26 is smaller than the diameter of the immersion hole 21 of the cylindrical tank body 14, and serves both as a wall surface function of the cylindrical tank body 14 and a function of guiding the wire 11 to the cylindrical tank body 14. Since the inlet side guide plate 16 is likely to wear due to contact with the wire 11, the corner portion of the guide hole 26 of the inlet side guide plate 16 is subjected to fillet processing, and the material is vacuum-quenched into SKD 11 to increase the surface hardness. After that, a hard chrome plated one is used.

  The outlet side guide plate 18 is also in close contact with the cylindrical tank body 14 with the sealing material 17 interposed therebetween, and a guide hole 27 is formed. The diameter of the guide hole 27 is smaller than the diameter of the immersion hole 21 of the cylindrical tank body 14, and also serves as a wall surface mechanism of the cylindrical tank body 14 and a guide mechanism to the adjustment die 28 of the wire 11. Since the outlet side guide plate 18 is easy to wear due to contact with the wire 11, the corner portion of the guide hole 27 of the outlet side guide plate 18 is subjected to fillet processing, and the material is vacuum-quenched into SKD 11 as a material to increase the surface hardness. Also, use a hard chrome plated one. The immersion hole 21 of the cylindrical tank body 14 is closed by an inlet side guide plate 16 having a guide hole 26 and an outlet side guide plate 18 having a guide hole 27, and the diameter of the guide hole 26 of the inlet side guide plate 16 is set. Since the diameter of the guide hole 27 of the outlet guide 18 is smaller than the diameter of the immersion hole 21 and smaller than the diameter of the immersion hole 21, the contact with the outside air of the adhesive is suppressed as much as possible. The agent can be filled and retained in the immersion hole 21.

  The adjustment die 28 is in close contact with the outlet side guide plate 18 of the cylindrical tank 13 with a sealant 29 interposed therebetween, and is led out from the guide hole 27 of the outlet side guide plate 18 and passes through the adjustment hole 32 of the adjustment die 28. The film thickness of the adhesive adhered to the film is adjusted. The adjustment die 28 includes a die holder 30 and an adjustment die main body 31, and the adjustment die main body 31 having a different diameter of the adjustment hole 32 can be easily replaced. The diameter of the adjustment hole 32 of the adjustment die main body 31 is smaller than the diameter of the immersion hole 21 of the cylindrical tank main body 14 and smaller than the diameter of the guide hole 27 of the outlet side guide plate 18. The adjustment hole 32 of the adjustment die main body 31 is coaxial with the guide hole 26 of the inlet side guide plate 16, the immersion hole 21 of the cylindrical tank main body 14, and the guide hole 27 of the outlet side guide plate 18. By constructing on the same axis and moving the wire 11 on its axis, contact between the wire 11 and each hole 26, 21, 27, 32 is avoided, and the adhesive adhered to the wire 11 through the adjustment hole 32 The film thickness can be adjusted with high accuracy. As the material of the adjustment die 28, a material which is hardened by vacuum quenching in the SKD 11 and then hard chrome plated is used. Fluorine resin such as polytetrafluoroethylene is used for the sealing materials 15, 17, and 29.

  The adhesive tank 36 is opened and closed by opening and closing the sealing lid 35, and the adhesive 37 is loaded and stored. As a temperature adjustment mechanism, a belt-like silicon heater 38 is wound around the lower outer periphery of the adhesive tank 36. The adhesive tank 36 includes a stirrer 39 having a stirring blade 34, and the adhesive 37 is stirred to reduce temperature unevenness of the adhesive 37 in the tank. The arrow indicates the direction of stirring by the stirrer 39. The gear pump 40 pressure-feeds and supplies the adhesive 37 from the adhesive tank 36 through the pipe 19 to the cylindrical tank 13. Fluorine resin such as polytetrafluoroethylene and stainless steel are used for the piping. A belt-shaped silicon heater is wound around the gear pump 40 and the pipe 19 as a temperature adjusting mechanism (not shown), and a cartridge heater is embedded in the cylindrical tank 13. Although not shown in the drawing, a wire unwinding device is installed at the front stage of the coating device, and a hot air drying device and a wire winding device for the wire coated with adhesive are installed at the subsequent stage.

  Next, an application method of an application device for applying the coating agent to the wire will be described. As shown in FIG. 1, the wire rod is passed through guide rollers 12 → tubular tank 13 (inlet side guide plate 16 + tubular tank body 14 + outlet side guide plate 18) → adjusting die 28 in the following order, and the wire rod is a stranded wire. Is held at a constant tension. While heating the heater of each part as a temperature adjustment mechanism mentioned above, it stirs and the adhesive agent 37 in the adhesive agent tank 36 is set to preset liquid temperature. At the start of operation, the gear pump 40 of the coating device is rotated and the valve 20 is opened, and the adhesive is supplied and retained in the immersion hole 21 of the cylindrical tank 13 through the buffer hole 22. Then, an unillustrated unwinding device, winding device, and hot air drying device start operation, and the wire travels, and guide roller 12 → tubular tank 13 (inlet side guide plate 16 + tubular tank body 14 + outlet side). The guide plate 18) passes through the adjusting die 28 in order. At this time, the gap between the wall surface of the immersion hole 21 of the cylindrical tank 13 and the wire 11 is filled with the adhesive pumped by the gear pump 40, and the adhesive is attached to the entire circumference of the wire rod. The adhesive adhering to the wire is reduced to an amount corresponding to the diameter of the adjustment hole 32 of the adjustment die 28, and the film thickness of the adhesive becomes a predetermined thickness. A predetermined amount of adhesive coating (resin coating) is formed on the entire circumference of the outer periphery of the wire by passing the wire with the applied amount of the adhesive adjusted through a drying device and volatilizing the organic solvent in the adhesive.

Next, Example 1 will be described. Using the apparatus for applying the coating agent to the wire shown in FIG. 1, verification of Example 1 was performed under the following conditions.
Adhesion of about 10 wt% of synthetic resin as non-volatile content and about 90 wt% of toluene, isopropyl alcohol, ethyl alcohol, etc. as volatile content to about 1.3 mm stranded wire made by twisting 7 strands of about 0.4 mm steel wire The agent was used.

  The guide hole 26 of the inlet side guide plate 16 is φ2 mm, the hole corner is R2.5 mm fillet, and the hole length is 15 mm. The guide hole 27 of the outlet side guide plate 18 has a diameter of 2 mm, the corner of the hole has an R2.5 mm fillet, and the hole length is 15 mm. The immersion hole 21 of the cylindrical tank main body 14 is φ3 mm, the hole length is 72 mm, the supply hole is φ2 mm, and the immersion hole 21 has three positions in the circumferential direction in the short cross-sectional circle, and the immersion hole 21 is spaced 12 mm apart in the longitudinal direction. Four places were provided. The buffer hole 22 had a U-shaped section with a width of 4 mm in the short direction. The adjustment hole 32 of the adjustment die 28 was φ1.5 mm and the hole length was 30 mm. The twisted wire speed was 15 m / min, the running tension was 120 N, and the temperature in the hot air dryer was 90 ° C. The liquid temperature of the adhesive was 25 ° C., and the pumping amount by the gear pump was about 7 ml / min. As a result, it was confirmed that the film could be applied almost uniformly with a film thickness of about 6 μm in the peak portion without being drained with about 9000 m of stranded wire in about 10 hours of operation time.

  In addition, this invention is not limited to Embodiment 1 and Example 1 which were mentioned above, A various deformation | transformation is possible within the range which does not change the summary. For example, in the first embodiment, the number of wires processed is one, but by preparing several sets of cylindrical tanks and valves and connecting them to a common gear pump, several wires can be processed in parallel. A coating device for the coating agent can also be formed. In the first embodiment, a one-component organic solvent-containing adhesive is used as the coating agent. However, the varnish, the enamel, the paint, the two-component or three-component mixed adhesive is used. Can be used. In the first embodiment, the coating agent is applied to the horizontal wire, but the coating agent is applied to the vertical wire that is vertical (the direction parallel to the direction of gravity). You can also. In addition, a cover may be provided in order to prevent dust and dust from entering the cylindrical tank portion. Moreover, in order to prevent the influence of the atmospheric temperature on the coating agent, a temperature-adjusted gas may be put in a cover provided in the cylindrical tank portion.

DESCRIPTION OF SYMBOLS 11 Wire material 12 Guide roller 13 Cylindrical tank 14 Cylindrical tank main body 15 Sealing material 16 Inlet side guide plate 17 Sealing material 18 Outlet side guide plate 19 Piping 20 Valve 21 Immersion hole 22 Buffer hole 23 Valve hole 24 Supply hole 25 Stopper plug 26 Guide hole 27 Guide hole 28 Adjustment die 29 Sealing material 30 Die holder 31 Adjustment die body 32 Adjustment hole 34 Stirring blade 35 Sealing lid 36 Adhesive tank 37 Adhesive 38 Silicon heater 39 Stirrer 40 Gear pump

Claims (3)

A cylindrical shape having an inlet-side guide having a guide hole through which the wire passes and an outlet-side guide having a guide hole through which the wire passes, and having an immersion hole for supplying and filling the coating material with the coating agent. Tank,
Coating agent tank,
A gear pump that feeds the coating agent from the coating agent tank to the cylindrical tank through a pipe;
And an adjusting die for adjusting the film thickness of the coating agent attached to the wire, having an adjustment hole that is in close contact with the cylindrical tank and allows the wire attached with the coating agent to pass therethrough,
The diameter of the guide hole of the inlet side guide is smaller than the diameter of the immersion hole and the diameter of the guide hole of the outlet side guide is smaller than the diameter of the immersion hole so that the coating agent stays in the immersion hole. Formed,
The guide hole of the inlet side guide, the immersion hole of the cylindrical tank, the guide hole of the outlet side guide, and the adjustment hole of the adjustment die are coaxial.
In the immersion hole of the cylindrical tank, the coating agent fed by pressure from the gear pump is supplied and filled from a plurality of supply holes provided in the longitudinal direction of the immersion hole through which the wire passes,
The wire is introduced from the guide hole of the inlet side guide, passes through the immersion hole of the cylindrical tank, and the wire to which the coating agent is attached is led out from the guide hole of the outlet side guide and passes through the adjustment hole. When applying the coating agent, the coating agent is applied to the wire so that the film thickness of the coating agent adhered to the wire through the adjustment hole is adjusted. The cylindrical tank having the immersion hole is provided with a buffer hole surrounding the immersion hole, and the coating agent supplied by pressure from the gear pump is supplied and filled into the buffer hole, and supplied to the buffer hole and filled. The apparatus for applying a coating agent to a wire according to claim 1 , wherein the agent is supplied to the immersion hole through the plurality of supply holes . The apparatus for applying a coating agent to a wire rod according to claim 1 , further comprising a temperature adjusting mechanism for adjusting the temperature of the coating agent tank, the pipe, the gear pump, and the cylindrical tank.

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