JP2012067405A - Adhesive application device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive application device that attaches a highly volatile adhesive to a long material with spiral irregularity on the outer peripheral surface, such as a steel rope, in the circumferential and longitudinal directions without deterioration so as to allow the adhesive to be applied uniformly on the irregularity in the circumferential direction with less variation in thickness in the longitudinal direction.SOLUTION: An adhesive application device for applying an adhesive to a long material to be coated with irregularity on the outer peripheral surface, such as a steel rope 1, is provided with a solution storage tank 11 enabling temperature adjustment for storing an adhesive 41, a discharge mechanism 26 for discharging a required amount of adhesive, a cylindrical nozzle 2 into which the material to be coated 1 is inserted while being moved and that attaches to the material to be coated 1 the adhesive discharged from the discharge mechanism 26 from a supply hole, and a restrictor 3 for adjusting the thickness of the adhesive attached to the material to be coated 1.

Description

  According to the present invention, a highly volatile adhesive is adhered to a circumferential direction and a longitudinal direction of a long material to be coated having a spiral unevenness on an outer peripheral surface such as a steel rope, and unevenness is unevenly formed in the circumferential direction. The present invention also relates to an adhesive coating apparatus that suppresses film thickness fluctuations in the longitudinal direction.

  For example, when a resin is coated on a steel rope, an adhesive is applied to the outer circumference of the rope to bond and fix the resin. Conventionally, as a method for continuously applying adhesive to the outer surface of a round bar or cylindrical long material such as a tube or hose, for example, a long material on a felt, rubber plate, sponge or the like provided with a hole through which the long material can be inserted. There is a method in which the adhesive applied to the outer circumferential surface of the long material is squeezed to be uniform. However, in the above method, if the adhesive is squeezed to be uniform using felt, rubber plate, sponge, etc., the insertion hole portion that comes into contact with the outer circumferential surface of the long material may be worn or worn. May cause partial expansion of the hole or misalignment of the long material, and a uniform thickness of adhesive may be continuously applied (forming a uniform thickness adhesive layer). There was a problem that it was difficult.

  In contrast, this is a method of continuously applying an adhesive to the outer peripheral surface of a hose material that is being manufactured, and an adhesive application device that continuously applies the adhesive to the outer peripheral surface, and supports swinging in the vertical and horizontal directions. The taper cylindrical adhesive squeezing device is installed, and the excess adhesive is scraped off by the squeezing member knitted with nylon long fibers provided at the tip of the squeezing device, and the adhesive with a uniform thickness is continuously applied. There are things that stick. (See Patent Document 1)

  In the application method of Patent Document 1, in the case of a long material having spiral irregularities on the outer peripheral surface such as a steel rope, the squeezing device does not follow the irregularities on the outer peripheral surface, and the amount of squeezing of the adhesive changes due to the irregularities. It is difficult to form an adhesion layer with unevenness and to form an adhesive layer having a uniform thickness in the circumferential direction of the outer peripheral surface. Further, the drawing device is scraped by the spiral irregularities on the outer peripheral surface, and the thickness of the adhesive gradually increases in the longitudinal direction of the steel rope. In particular, when an adhesive containing a volatile solvent is used, the solvent in the adhesive in the liquid tank volatilizes with the operation time, the viscosity of the adhesive increases, and the amount of adhesion to the outer surface of the wire rope There was also a problem that fluctuated.

  Although it is not an adhesive, as a continuous oil application method for long materials with irregularities on the outer peripheral surface such as a wire rope, the wire rope is immersed in a liquid layer filled with oil and squeezed with felt, or oil is applied to the wire rope. There is a method of dripping and squeezing with felt. However, since the method as described above uses felt or the like to squeeze the oil uniformly, the insertion hole portion that comes into contact with the outer peripheral surface of the wire rope wears out or becomes loose, resulting in partial Hole expansion occurs, the amount of oil squeezed changes due to unevenness, and the oil application thickness changes in the circumferential direction and longitudinal direction of the wire rope. Therefore, it is necessary to frequently change the felt.

  On the other hand, after attaching oil to the wire rope, by engaging a half-tubular porous oil coating material or a brush that rotates in a swirling manner along the rope groove to the rope surface, An oiling device for uniformizing the application of is shown. (See Patent Document 2)

  In addition, after attaching oil to the rope, a half-cylindrical elastic body (having a spiral groove) formed by transferring irregularities of the same pitch as the rope to the cross section is sandwiched in the rope, and the rope is pulled and twisted An oiling device is shown in which an elastic body rotates by itself when a rotational moment according to the pitch acts. (See Patent Document 3)

  The adhesive mainly comprises a resin component of a polymer material and a volatile organic solvent component. Unlike oils and paints, some adhesives cure and react when the solvent volatilizes at room temperature. In the apparatus of Patent Document 2 described above, when such a room temperature reaction type adhesive is used, the adhesive attached to the brush is solidified, the brush fibers are integrated, and the copying and spreading function of the brush is impaired. Sometimes.

  Moreover, in the apparatus of the above-mentioned patent document 3, since the half-cylindrical elastic body formed by transferring the unevenness of the same pitch as the rope to the cross section is sandwiched between the ropes, the adhesive film against the outer diameter variation of the rope. Thickness adjustment is difficult, and when using a low-viscosity adhesive, the adhesive may be scraped off or wiped off by an elastic body (that is, there is no adhesive). In addition, the production of the elastic body is troublesome and increases the cost.

Japanese Patent Laid-Open No. 03-296465 JP 59-194888 A Japanese Patent Laid-Open No. 05-010387

  In view of such circumstances, the present invention attaches a highly volatile adhesive without alteration to the outer circumferential direction and the longitudinal direction of a long adherend having spiral irregularities on the outer circumferential surface such as a steel rope, It is an object of the present invention to provide an adhesive coating device that has no unevenness in the circumferential direction and suppresses film thickness fluctuation in the longitudinal direction.

  An adhesive application device according to the present invention is an adhesive application device for a long material to be coated having a spiral unevenness on an outer peripheral surface such as a steel rope, and a temperature-adjustable solution tank for storing the adhesive And a discharge mechanism that sends out a required amount of adhesive, and the material to be coated is inserted while being moved, and the adhesive sent from the discharge mechanism is discharged from a supply hole in the middle of the insertion to the material to be coated. A cylindrical nozzle to be attached and a diaphragm mechanism for adjusting the film thickness of the adhesive attached on the material to be coated are provided.

  According to the present invention, a highly volatile adhesive is adhered to the circumferential direction and the longitudinal direction of a long coated material having spiral irregularities on the outer peripheral surface such as a steel rope, and irregularities in the circumferential direction are obtained. The coating can be applied with no unevenness and with suppressed fluctuations in the film thickness in the longitudinal direction. Further, since the film thickness can be adjusted by adjusting the pressure of air or the like, the quality can be improved.

It is a schematic block diagram of the adhesive agent coating apparatus which concerns on Embodiment 1 of this invention. FIG. 3 is a plan view showing a partial cross section of the diaphragm mechanism of the first embodiment. FIG. 3 is a perspective view showing a diaphragm mechanism according to the first embodiment. 1 is a perspective view showing an air chuck according to Embodiment 1. FIG. 6 is a perspective view showing another form of air chuck according to Embodiment 1. FIG.

Embodiment 1 FIG.
FIG. 1 is a schematic configuration diagram of an adhesive application device according to Embodiment 1 of the present invention. The adhesive application device according to the present invention is roughly divided into a discharge mechanism 26 part for supplying an adhesive and a diaphragm mechanism 3 part for applying the adhesive to the material and adjusting the film thickness. The discharge mechanism 26 is sent from a solution tank 11 with a temperature control function for hermetically storing, for example, two kinds of adhesives 41 (A agent and B agent) having high volatility, and a pipe 9 from the solution tank 11. In the case of a two-component adhesive, a gear pump 10 that sends out the required amount of adhesive, and a mixer 7 that forcibly agitates and mixes the A agent and B agent sent from the gear pump 10 through the discharge valve 8. The solution tank 11 includes a silicon heater 13 for temperature adjustment and a stirrer 12 driven by a stirring motor 29.

  On the other hand, the throttle mechanism 3 portion is inserted into the steel rope 1 that is the material to be coated, and the belt 31 is formed by the cylindrical nozzle 2 that attaches the adhesive discharged from the discharge mechanism 26 to the steel rope 1 and the motor 32. And a pressurizing device such as an air chuck 4 that rotates integrally with the rotary joint 5. Note that an air wiper 6 is disposed at a subsequent stage of the air chuck 4.

  As a temperature adjustment mechanism, a silicon heater (not shown) is wound around the gear pump 10, the pipe 9, and the mixer 7 in addition to the silicon heater 13 around the solution tank 11, and a cartridge heater (not shown) is wound around the cylindrical nozzle 2. Is embedded.

  Although not shown, the adhesive application device and the application area are surrounded by a temperature control booth, and the ambient temperature is managed at 23 to 27 degrees Celsius. Further, an unwinding device for the steel rope 1 is installed in the front stage of the adhesive coating device, and a hot air drying device and a winding device are installed in the subsequent stage.

  FIG. 2 is a plan view showing a part of the cylindrical nozzle 2 and the diaphragm mechanism 3 in cross section. The cylindrical nozzle 2 has a stainless double cylinder structure composed of an inner cylinder 2A and an outer cylinder 2B, and an adhesive passage 20 through which an adhesive is passed is formed between the inner and outer cylinders. The adhesive passage 20 extends in the circumferential direction and the longitudinal direction of the cylinder and communicates with a supply hole 22A opened in the inner cylinder toward the steel rope 1 inserted into the inner cylinder 2A. A plurality (three in the figure) of supply holes 22A are formed along the longitudinal direction at, for example, four divided positions on the circumference of the inner cylinder 2A. A labyrinth groove 21 is provided in the adhesive passage 20 of the cylindrical nozzle 2 in order to uniformly route the adhesive supplied from the discharge mechanism 26 in the circumferential direction of the cylindrical nozzle 2. A cylindrical seal plate 28 having an inner diameter substantially equal to the diameter of the steel rope 1 is attached to the inner periphery of the inner cylinder 2A. Near the center of the seal plate 28, a portion corresponding to the supply hole 22A of the inner cylinder 2A is formed with a liquid reservoir 25 having a slightly larger diameter than the other, and the adhesive liquid is stored here. . In the liquid reservoir 25 of the seal plate 28, a plurality of supply holes 22B connected to the supply holes 22A are provided by shifting the positions of both supply holes.

  2 to 4, a throttle mechanism 3 is provided on the rear stage side of the cylindrical nozzle 2. The throttle mechanism 3 includes a pressurizing device that pressurizes and holds the felt 14 wound around the rotary joint 5 and the steel rope 1 from a plurality of locations in the circumferential direction, for example, an air chuck 4. The rotary joint 5 is supported on the outer periphery of the cylindrical nozzle 2 by a bearing 23 via a bearing 30 and is driven by a belt 31 to rotate along the outer periphery of the cylindrical nozzle 2. An O-ring 33 made of Viton is inserted between the rotary joint 5 and the bearing 23. The air chuck 4 is fixed to one end of the rotary joint 5 concentrically with the cylindrical nozzle 2 and rotates integrally with the rotary joint 5. The air chuck 4 pressurizes the felt 14 wound around the steel rope 1 in a central space 4A from a plurality of locations in the circumferential direction. The air chuck 4 is supplied with compressed air (air) from an air supply pipe 34 fixed to the bearing 23 so that the gripping force of the steel rope 1 by the felt 14 can be adjusted.

  As shown in FIG. 1, an air wiper 6 that rotates in the same manner as the air chuck 4 is provided on the rear side of the air chuck 4 so that the fibers of the felt 14 attached to the steel rope 1 are blown away with air. Has been made.

  Next, the operation of the adhesive application device will be described. As shown in FIG. 1, the steel rope 1 moves in parallel to the horizontal plane. The steel rope 1 is passed through the cylindrical nozzle 2 → the throttling mechanism 3 in this order and held at a constant tension. At that time, the adjustment base (not shown) of the throttle mechanism 3 is moved so that the steel rope 1 and the axis of the throttle mechanism 3 are aligned.

  While heating the silicon heater 13 of the solution tank 11, the stirrer 12 is rotated and the adhesive agent 41 is set to preset temperature. When the operation is started, the gear pump 10 of the adhesive coating device is rotated and the discharge valve 8 is opened. The A agent and the B agent are forcibly stirred by the mixer 7, and the mixed solution is sent out to the cylindrical nozzle 2. At the same time, an unillustrated unwinding device, winding device, and hot air drying device start operation, and the steel rope 1 travels inside the cylindrical nozzle 2.

  As shown by a double arrow F in FIG. 2, the adhesive supplied from the discharge mechanism 26 to the cylindrical nozzle 2 is an adhesive passage 20 between the inner cylinder 2A and the outer cylinder 2B of the cylindrical nozzle 2 → the labyrinth groove. 21 → The supply hole 22 </ b> A of the inner cylinder 2 </ b> A → the supply hole 22 </ b> B of the seal plate 28 is reached to the liquid reservoir 25, and an adhesive is attached to the outer periphery of the steel rope 1. At this time, since the adhesive is supplied substantially uniformly from any of the upper, lower, left, and right supply holes by the pressure applied when passing through the labyrinth-shaped groove 21, it adheres evenly to the outer periphery of the steel rope 1.

  At the same time, the rotary joint 5 and the air chuck 4 constituting the aperture mechanism 3 are rotated by the motor 32 and the belt 31. As a result, the air chuck 4 sandwiches the steel rope 1 while pressing it through the felt 14 wound around the steel rope 1, and forcibly twists the felt 14 according to the twist pitch of the strand of the steel rope 1 ( Swirl, spiral rotation). Thereby, the felt 14 squeezes the adhesive to an appropriate amount while following the spiral irregularities on the outer peripheral surface of the steel rope 1. The amount of adhesive applied is adjusted by adjusting the air pressure supplied from the air supply pipe 34 to the air chuck 4.

  Further, the fibers of the felt 14 attached to the steel rope 1 are blown off by blowing low-flow air with the air wiper 6. When high-pressure, high-flow-rate air is blown with an air wiper, the solvent rapidly evaporates, causing a phenomenon that the resin becomes semi-dry and the resin becomes countless net-like yarns (string drawing phenomenon).

  Finally, the steel rope 1 is passed through a drying device, and the solvent in the adhesive is volatilized to form a predetermined adhesive film (resin film, adhesive layer) on the outer circumference and the entire length of the steel rope 1.

  In addition, as shown in FIG. 1, a second throttle mechanism 3S may be provided in series with the throttle mechanism 3, and the felt may be alternately replaced with a new one by checking the state of the adhesive film thickness on the steel rope.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible within the range which does not change the summary. For example, although an air gripper type air chuck is used as the pressurizing device, a mechanism in which a plurality of air cylinders 35 are arranged as shown in FIG. 4 may be used. In the embodiment, the two-component type is used, but it can also be used for a single component, a plurality of mixed adhesives, and a primer. In the embodiment, a horizontal coating apparatus is used. However, a vertical coating apparatus that is vertical (a direction parallel to the direction of gravity) can be formed.

  Next, examples will be described. The inventors of the present invention verified the examples under the following conditions using the adhesive coating apparatus shown in FIG.

  The workpiece was a steel rope 1 of about φ11 mm in which 19 strands of about φ1.3 mm were twisted, and the running speed was 5 m / min. As the adhesive 41, a two-component adhesive was used. The agent A consists of about 10 wt% of synthetic resin and about 90 wt% of toluene, methyl isobutyl ketone, methyl ethyl ketone and the like as volatile components. The B agent comprises about 30 wt% synthetic resin and about 70 wt% butyl acetate, ethyl acetate, etc. as volatile components. A agent and B agent were mixed and used by the ratio of 1: 1. The adhesive temperature was 25 ° C., the rotation speed of the stirring mixer 7 was 800 rpm, and the discharge rate of the mixed solution was about 11 g / min.

  The cylindrical nozzle 2 had an inner diameter of φ22 mm, an outer diameter of φ38 mm, a diameter of the supply hole 22A of φ2 mm, a diameter of the seal plate 28 of φ12 mm, a liquid reservoir 25 inner diameter of φ14 mm, and a liquid reservoir 25 length of about 40 mm. The air chuck 4 uses an air gripper whose inside is a rubber material and can be expanded and contracted by air, and the air pressure is set to 0.1 MPa. Since the spiral uneven pitch is about 74 mm, the rotation speed of the diaphragm mechanism 3 is about 68 rpm (5 × 10 ^ 3 [mm / min] / 74 [mm]). Felt 14 is made of wool and has a density of 0.28 g / cm3 or less because it needs chemical resistance and softness similar to spiral irregularities on the outer surface of the steel rope. When the felt 14 was wound around the steel rope 1, it was temporarily fixed with an insulation lock. The felt 14 was constantly infiltrated with an adhesive before and during use.

  As a result of processing the steel rope 3000 m, it was confirmed that it could be applied almost uniformly with an operating time of about 10 hours and a film thickness of about 3 to 6 um in the valley. In addition, it was confirmed that adjusting the air pressure of the air chuck 4 changed the tightening condition of the felt 14 and adjusted the squeezing amount of the adhesive.

  The steel rope is formed around the strand arranged in the central portion in a state where a plurality of strands are surrounded. The strand arranged in the peripheral portion is spiral with respect to the longitudinal direction of the rope, that is, the axial direction. It is configured to be twisted. That is, the cross-sectional shape of the steel rope is formed so that the phase changes around the rope axis.

1 steel rope, 2 cylindrical nozzle,
2A inner cylinder, 2B outer cylinder,
3 Drawing mechanism, 4 Air chuck,
4A center space, 5 rotary joint,
6 Air wiper, 7 Mixer,
8 Discharge valve, 9 Piping,
10 gear pump, 11 solution tank,
12 Stirrer, 13 Silicon heater,
14 felt, 20 adhesive passages,
21 labyrinth groove, 22A supply hole,
22B supply hole, 23 bearing,
25 liquid reservoir, 26 discharge mechanism,
28 sealing plate, 29 stirring motor,
35 Air cylinder, 31 belt,
32 motor, 33 O-ring,
34 Air supply piping, 41 Adhesive.

Claims (8)

  An adhesive application device for long coated materials with spiral irregularities on the outer peripheral surface such as steel ropes, a temperature-adjustable solution tank that stores the adhesive, and a discharge that delivers the required amount of adhesive A mechanism, a cylindrical nozzle that is inserted while moving the material to be coated, and that discharges the adhesive sent from the discharge mechanism through a supply hole in the middle of the insertion, and adheres to the material to be coated; An adhesive applicator comprising a drawing mechanism for adjusting a film thickness of an adhesive adhered on a material.   The throttle mechanism includes a felt wound around the material to which the adhesive is applied in the cylindrical nozzle, and a pressurizing device that pressurizes the felt from a plurality of locations in the circumferential direction. 2. The adhesive application device according to claim 1, wherein the felt is forcibly rotated together with the felt so as to follow the spiral unevenness of the outer surface of the material to be coated. .   The adhesive application device according to claim 2, further comprising an air wiper that rotates together with the drawing mechanism and removes felt fibers attached to the long material, following the drawing mechanism.   The discharge mechanism includes a mixer for forcibly stirring and mixing immediately before discharging a predetermined amount of the plurality of adhesives to the cylindrical nozzle when using a plurality of liquid adhesives. 2. The adhesive application device according to 1.   The adhesive applying apparatus according to claim 1, wherein the cylindrical nozzle includes a liquid reservoir that can supply an adhesive from an entire circumferential direction of the material to be applied.   The cylindrical nozzle has a double cylinder structure in which an adhesive passage leading to the supply hole is formed between both cylinders, and a labyrinth groove is formed in a part of the adhesive passage. The adhesive applicator described in 1.   The adhesive coating apparatus according to claim 1, wherein at least two squeezing mechanisms are provided along the material to be coated.   The adhesive application device according to claim 2, wherein the pressure device is an air chuck, and pressure adjustment is performed by air.

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