JP2016107243A - Coating applicator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating applicator not generating coating irregularities at a passage time of a joint.SOLUTION: When a joint 2 is about to pass in the state where a web 1 is pressed coatably onto a gravure roll 12, a control part 42 saves a left side part of an upper press roll 24 by an upper left move part 244, and then saves a right side part of the upper press roll 24 by an upper right move part 245.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a coating apparatus.

  Conventionally, a kiss touch type coating apparatus using a gravure roll has been proposed. In this coating apparatus, a pressing roll is rotatably provided in front of and behind the gravure roll, and a long web traveling by the two pressing rollers is pressed against the gravure roll to apply the coating liquid to the gravure coating. (For example, see Patent Documents 1 and 2).

  In this coating apparatus, when the seam of the web approaches the gravure roll, in order to avoid this seam, the two pressing rollers are simultaneously retracted to retract the web from the gravure roll.

JP 2014-124559 A JP 2013-173144 A

  However, in the above-described coating apparatus, since it was necessary to retract the two pressing rollers at the same time, even if the time for the seam to pass is very short, a considerable amount of time is required until the two pressing rollers retract and press again. There was a problem that it took time and wasted time was required for coating on the web. Further, when the two pressing rollers are retracted at the same time, there has been a problem that the coating state from the gravure roll to the web changes and coating unevenness occurs on the web.

  Therefore, in view of the above problems, the present invention has an object to provide a coating apparatus in which when the seam of the web approaches, the web can be quickly retracted from the coating means and coating unevenness does not occur. .

The present invention is a coating means for applying a coating liquid to a web traveling in the front-rear direction;
A first pressing roll that is disposed in front of the coating means and presses the web so that the web can be applied to the coating means;
A second pressing roll that is arranged behind the coating means and presses the web so that it can be applied to the coating means;
A first left moving means for moving from an approaching state to press the web to the coating means so as to be able to coat the retracted state while rotatably supporting the left side of the first pressing roll;
First right moving means for moving from the approaching state to press the web to the coating means so as to be able to coat the retracted state while rotatably supporting the right side of the first pressing roll;
Second support means for rotatably supporting the left and right sides of the second pressing roll;
A control unit for controlling the first left moving means and the first right moving means;
Have
When the control unit is pressing the coating means so that the web can be applied,
(1) The left side of the first pressing roll is retracted by the first left moving means, and then the right side of the first pressing roll is retracted by the first right moving means,
Or
(2) The right side of the first pressing roll is retracted by the first right moving means, and then the left side of the first pressing roll is retracted by the first left moving means.
This is a coating device that performs evacuation control.

Further, the present invention is a coating means for applying a coating liquid to a web traveling in the front-rear direction;
A first pressing roll that is disposed in front of the coating means and presses the web so that the web can be applied to the coating means;
A second pressing roll that is arranged behind the coating means and presses the web so that it can be applied to the coating means;
First support means for rotatably supporting the left and right sides of the first pressing roll;
Second left moving means for moving from the approaching state to press the web to the coating means so as to be able to coat the retracted state while rotatably supporting the left side of the second pressing roll;
A second right moving means for moving from the approaching state to press the web to the coating means so as to be able to coat the retreating state while rotatably supporting the right side of the second pressing roll;
A control unit for controlling the second left moving unit and the second right moving unit;
Have
When the control unit is pressing the coating means so that the web can be applied,
(1) The left side of the second pressing roll is retracted by the second left moving means, and then the right side of the second pressing roll is retracted by the second right moving means,
Or
(2) The right side of the second pressing roll is retracted by the second right moving means, and then the left side of the second pressing roll is retracted by the second left moving means.
This is a coating device that performs evacuation control.

  According to the present invention, since the pressing roller is sequentially separated from the left side or the right side, the pressing roller does not leave the web at a time, and coating unevenness does not occur.

It is a side view at the time of the coating of the coating apparatus of this embodiment. It is a top view at the time of coating of a coating device. It is a side view of the coating apparatus of the state evacuated from the joint. It is a top view of the coating apparatus in the middle of evacuating from a joint. It is a top view of the coating apparatus of the state evacuated from the joint. It is a side view of a coating device when moving a movable stand to a retracted state. It is a block diagram of a coating device.

  Hereinafter, the coating apparatus 10 of one Embodiment of this invention is demonstrated based on FIGS. The coating apparatus 10 of the present embodiment is a kiss-touch type gravure coating apparatus, and the long web 1 is a synthetic resin film, paper, metal foil, metal net, fabric, etc. There is a seam 2 between the webs 1 for each predetermined length. The portion of the seam 2 is thicker than the other portions.

(1) Structure of coating apparatus 10 Next, the structure of the coating apparatus 10 will be described with reference to FIGS.

  The gravure roll 12 has a predetermined engraving on the surface and is driven to rotate in the clockwise direction in FIG.

  The nozzle 14 is arranged in the vertical direction, and a liquid reservoir 16 is provided in the nozzle 14, and half of the gravure roll 12 enters the liquid reservoir 16. A doctor blade 18 for coating liquid projects from the lower and upper portions of the liquid reservoir 16 toward the gravure roll 12. Side seals (not shown) are provided on both sides of the nozzle 14. A liquid storage space sealed by the liquid storage part 16, the two doctor blades 18 and 18, and a pair of left and right side seals is formed. A liquid supply opening 20 for coating liquid is opened at the bottom of the bottom of the liquid reservoir 16, and the coating liquid is supplied from the pump 44 shown in FIG. A drainage opening 22 is opened at the upper part of the bottom surface of the liquid reservoir 16, and the coating liquid is discharged from the drainage opening 22 so that the coating liquid does not overflow from the liquid reservoir space. The discharged coating liquid circulates in a coating tank (not shown).

  An upper pressing roll (first pressing roll) 24 and a lower pressing roll (second pressing roll) 26 are rotatably arranged above and below the right side of the gravure roll 12, respectively. The web 1 traveling at a predetermined traveling speed V travels in the vertical direction in the order of the lower pressing roll 26, the gravure roll 12, and the upper pressing roll 24.

(2) Support Structure of Upper Press Roll 24 and Lower Press Roll 26 Next, a structure for rotatably supporting the upper press roll 24 and the lower press roll 26 will be described with reference to FIGS. 1 and 2.

  A fixed base 30 is fixed to a floor or a frame of the apparatus. A movable table 28 is provided on the fixed table 30 so as to be movable in the horizontal direction by the main moving unit 32. The main moving part 32 includes a main air cylinder 33 and a main rail 34. The main air cylinder 33 moves the moving base 28 in the horizontal direction along the main rail 34 provided in the horizontal direction on the fixed base 30. As shown in FIG. 1, the gravure roll 12 is disposed on the side of the movable table 28.

  As shown in FIG. 2, the left side of the upper pressing roll 24 provided on the upper part of the moving table 28 is rotatably supported by the upper left support arm 241. A self-aligning bearing 46 is disposed at the tip of the upper left support arm 241, and the left shaft 243 of the upper pressing roll 24 is supported eccentrically. The right side of the upper pressing roll 24 is rotatably supported by an upper right support arm 242. A self-aligning bearing 46 is also arranged at the tip of the upper right support arm 242 and supports the shaft 243 on the right side of the upper pressing roll 24 in an eccentric manner.

  The upper left support arm 241 is moved in the horizontal direction by the upper left moving unit 244, and the upper right support arm 242 is moved in the horizontal direction by the upper right moving unit 245.

  The upper left moving unit 244 is provided in the upper left part of the moving table 28. The upper left moving part 244 has an upper left air cylinder 246 and a horizontal straight upper left rail 247. When the upper left air cylinder 246 expands and contracts, the upper left support arm 241 moves in the horizontal direction along the upper left rail 247. The left side of the upper pressing roll 24 is retracted or approached from the gravure roll 12.

  The upper right moving unit 245 is provided in the upper right part of the moving table 28. The upper right moving part 245 includes a right upper air cylinder 248 and a horizontal straight upper right rail 249. When the upper right air cylinder 248 expands and contracts, the upper right support arm 242 moves in the horizontal direction along the upper right rail 249. The right side of the upper pressing roll 24 is retracted or approached from the gravure roll 12. The right side and the left side of the upper pressing roll 24 can be retracted or approached from the gravure roll 12 independently.

  The left side of the lower pressing roll 26 provided at the lower part of the moving table 28 is rotatably supported by the lower left support arm 261. A self-aligning bearing 46 is disposed at the tip of the lower left support arm 261, and a shaft 263 on the left side of the lower pressing roll 26 is eccentrically supported. The right side of the lower pressing roll 26 is rotatably supported by a lower right support arm 262. A self-aligning bearing 46 is also disposed at the tip of the lower right support arm 262, and the shaft 263 on the right side of the lower pressing roll 26 is supported eccentrically.

  The lower left support arm 261 is moved in the horizontal direction by the lower left mover 264, and the lower right support arm 262 is moved in the horizontal direction by the lower right mover 265.

  The lower left moving unit 264 is provided in the lower left part of the moving table 28. The lower left moving part 264 has a lower left air cylinder 266 and a horizontal straight lower left rail 267. When the lower left air cylinder 266 expands and contracts, the lower left support arm 261 moves in the horizontal direction along the lower left rail 267. Then, the left side of the lower pressing roll 26 is retracted or moved closer to the gravure roll 12.

  The lower right moving unit 265 is provided in the lower right part of the moving table 28. The lower right moving part 265 includes a lower right air cylinder 268 and a horizontal straight lower right rail 269, and the lower right support arm 262 extends along the lower right rail 269 by the expansion and contraction of the lower right air cylinder 268. Moving in the horizontal direction, the right side of the lower pressing roll 26 is retracted or moved closer to the gravure roll 12. The right side and the left side of the lower pressing roll 26 can be retracted or approached from the gravure roll 12 independently.

  A seam sensor 36 for detecting the seam of the web 1 is provided below the lower pressing roll 26. The joint sensor 36 is, for example, an optical sensor.

(3) Electrical configuration of coating apparatus 10 The electrical configuration of the coating apparatus 10 will be described based on the block diagram of FIG.

  First, the traveling motor 38 causes the web 1 to travel at a predetermined traveling speed V. The coating motor 40 rotates the gravure roll 12 in a direction opposite to the traveling direction of the web 1 at a predetermined rotational speed.

  A control unit 42 composed of a computer is connected to a traveling motor 38, a seam sensor 36, a pump 44 for supplying a coating liquid to the nozzle 14, and a coating motor 40. Furthermore, an upper left moving unit 244, an upper right moving unit 245, a lower left moving unit The moving unit 264, the lower right moving unit 265, and the main moving unit 32 are connected.

(4) Operation state of coating apparatus 10 Next, the operation state at the time of coating of the coating apparatus 10 is demonstrated based on FIGS.

  In the first step, the web 1 is disposed so as to pass between the lower pressing roll 26, the gravure roll 12, and the upper pressing roll 24, and the web 1 travels in the longitudinal direction (front-rear direction) by the traveling motor 38 at the traveling speed V. .

  In the second step, the coating liquid is supplied to the liquid reservoir 16 of the nozzle 14 by the pump 44, and the gravure roll 12 is rotated by the coating motor 40 to apply the coating liquid to the surface of the gravure roll 12. . Unnecessary coating liquid is scraped off by the doctor blades 18 and 18.

  In the third step, the moving base 28 is moved from the retracted state to the approaching state with respect to the fixed base 30. Further, the upper pressing roll 24 and the lower pressing roll 26 are also moved in the approaching state by the upper left moving unit 244, the upper right moving unit 245, the lower left moving unit 264, and the lower right moving unit 265. The “approaching state” refers to a state in which the web 1 is pressed by the upper pressing roll 24 and the lower pressing roll 26 and contacts the gravure roll 12.

  In the fourth step, when the upper pressing roll 24 and the lower pressing roll 26 are in the approaching state, the traveling web 1 is pressed against the surface of the gravure roll 12 and gravure coating is started.

  In the fifth step, when the seam sensor 36 detects the seam 2 of the web 1 while the web 1 is running and gravure coating is being performed, a detection signal is output to the control unit 42.

  In the sixth step, when the detection signal from the seam sensor 36 is input, the control unit 42 determines that the seam 2 is in its pressing position based on the travel distance and the traveling speed V from the position of the seam sensor 36 to the pressing position of the gravure roll 12. The time until it passes is calculated | required and the 7th process is performed from the 7th process until the joint 2 passes a press position.

  In the seventh step, as shown in FIG. 4, the control unit 42 moves only the upper left support arm 241 that supports the left side of the upper pressing roll 24 from the approached state to the retracted state by the upper left moving unit 244.

  In the eighth step, the control unit 42 moves the upper right support arm 242 from the approaching state to the retracted state by the upper right moving unit 245, as shown in FIG. As a result, the web 1 is separated from the gravure roll 12 and the seam 2 can pass as shown in FIGS. At this time, the upper pressing roll 24 is not separated from the gravure roll 12 in parallel as in the prior art, but is sequentially separated from the left side toward the right side. Therefore, the coating surface of the web 1 is disturbed or uneven coating occurs. I can't. The retreat distance of the upper pressing roll 24 is, for example, 5 mm to 30 mm.

  In the ninth step, when the seam 2 passes, the control unit 42 moves the left side of the upper pressing roll 24 from the retracted state to the approaching state by the upper left moving unit 244 and contacts the left side of the web 1 with the surface of the gravure roll 12. Let

  In the tenth step, the control unit 42 moves the right side of the upper pressing roll 24 from the retracted state to the approaching state by the upper right moving unit 245 so that the right side of the web 1 is brought into contact with the gravure roll 12. At this time, the web 1 does not suddenly contact with the gravure roll 12 in parallel, but sequentially contacts from the left side to the right side, so that the coating surface of the web 1 is not disturbed or unevenly coated.

  In the eleventh step, since the traveling web 1 is pressed against the surface of the gravure roll 12, the gravure coating is resumed.

  In the twelfth step, when the gravure coating on the web 1 is completed, the control unit 42 moves the moving table 28 from the approaching state to the retracted state by the main moving unit 32 as shown in FIG. And the lower pressing roll 26 are retracted from the gravure roll 12 together.

(5) Effect According to the present embodiment, when the seam 2 of the web 1 passes through the gravure roll 12, the unevenness in coating or the coating state is caused because the web 1 is sequentially separated from the left side of the upper pressing roll 24 toward the right side. Is not disturbed.

  Moreover, since the web 1 is contacted in order from the left side to the right side by the upper pressing roll 24 after the seam 2 has passed, coating unevenness and coating are not disturbed.

  Further, since it is only necessary to move the upper pressing roll 24 slightly, the moving time is shorter than in the prior art, the application portion of the web 1 cannot be wasted, and the change in the path length can be suppressed.

  Moreover, since the automatic eccentric bearing 46 is provided at the front-end | tip of the upper left support arm 241 and the upper right support arm 242, and the shaft 243 of the both sides of the upper press roll 24 is bearing, as shown in FIG. Even if the shaft 243 is eccentric, the upper pressing roll 24 can be moved while rotating.

(6) Modification Example In the above embodiment, when the upper pressing roll 24 is retracted, the right side is retracted next to the left side. Alternatively, the left side may be retracted next to the right side.

  Moreover, in the said embodiment, when making the upper pressing roll 24 into an approach state, the right side was made to approach next to the left side, but you may make the left side approach next to the right side instead.

  In the above embodiment, the upper pressing roll 24 is moved from the approaching state to the retracted state when the joint 2 passes, but the lower pressing roll 26 may be moved from the approaching state to the retracted state instead. Also in this case, the lower left moving unit 264 and the lower right moving unit 265 are retracted from the left side to the right side, or are retracted from the right side to the left side. Further, when approaching, the approach is made from the left side to the right side, or from the right side to the left side.

  In the above embodiment, only the upper pressing roll 24 is moved from the approaching state to the retracted state. Alternatively, both the upper pressing roll 24 and the lower pressing roll 26 may be moved from the retracting state to the approaching state. Good.

  Moreover, in the said embodiment, although the gravure coating apparatus was used as a means to apply a coating liquid to the web 1, it may replace with this and coating heads, such as die | dye, may be sufficient.

  In the above embodiment, the web 1 is run in the vertical direction. Alternatively, the web 1 may be run in the horizontal direction, and the gravure roll 12 as a coating means may be disposed below the web 1. .

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Web, 2 ... Seam, 10 ... Coating apparatus, 12 ... Gravure roll, 24 ... Upper press roll, 26 ... Lower press roll, 28 ... Moving stand, 30 ... Fixing base 32 ... Main moving part 36 ... Seam sensor 42 ... Control part 244 ... Upper left moving part 245 ... Upper right moving part 264 ... Lower left Moving unit, 265 ... Lower right moving unit

Claims (10)

Coating means for coating the coating liquid on the web traveling in the front-rear direction;
A first pressing roll that is disposed in front of the coating means and presses the web so that the web can be applied to the coating means;
A second pressing roll that is arranged behind the coating means and presses the web so that it can be applied to the coating means;
A first left moving means for moving from a pressing state to press the web to the coating means to a retracted state while rotatably supporting the left side of the first pressing roll;
First right moving means for moving from a pressing state to press the web to the coating means so as to be able to coat, while supporting a right side portion of the first pressing roll so as to be rotatable;
Second support means for rotatably supporting the left and right sides of the second pressing roll;
A control unit for controlling the first left moving means and the first right moving means;
Have
When the control unit is pressing the coating means so that the web can be applied,
(1) The left side of the first pressing roll is retracted by the first left moving means, and then the right side of the first pressing roll is retracted by the first right moving means,
Or
(2) The right side of the first pressing roll is retracted by the first right moving means, and then the left side of the first pressing roll is retracted by the first left moving means.
Evacuation control by
Coating equipment. In order to press the web so that the web can be applied to the coating means,
(1) The left part of the first pressing roll is moved from the retracted state to the pressing state by the first left moving means, and then the right part of the first pressing roll is moved by the first right moving means. Move from the retracted state to the pressed state,
Or
(2) The right side portion of the first pressing roll is moved from the retracted state to the pressing state by the first right moving means, and the left side portion of the first pressing roll is then moved by the first left moving means. Move from the retracted state to the pressed state,
The coating apparatus according to claim 1. The first pressing roll, the first left moving means, the first right moving means, the second pressing roll, and a main moving means for retreating the second supporting means integrally from the coating means,
The coating apparatus according to claim 1. The second support means includes
A second left moving means for moving from a pressing state to press the web to the coating means to a retracted state while rotatably supporting the left side of the second pressing roll;
Second right moving means for moving from the pressed state to press the web to the coating means so as to be able to coat the retracted state while rotatably supporting the right side of the second pressing roll;
The coating apparatus of Claim 1 which has these. Coating means for coating the coating liquid on the web traveling in the front-rear direction;
A first pressing roll that is disposed in front of the coating means and presses the web so that the web can be applied to the coating means;
A second pressing roll that is arranged behind the coating means and presses the web so that it can be applied to the coating means;
First support means for rotatably supporting the left and right sides of the first pressing roll;
A second left moving means for moving from a pressing state to press the web to the coating means to a retracted state while rotatably supporting the left side of the second pressing roll;
Second right moving means for moving from the pressed state to press the web to the coating means so as to be able to coat the retracted state while rotatably supporting the right side of the second pressing roll;
A control unit for controlling the second left moving unit and the second right moving unit;
Have
When the control unit is pressing the coating means so that the web can be applied,
(1) The left side of the second pressing roll is retracted by the second left moving means, and then the right side of the second pressing roll is retracted by the second right moving means,
Or
(2) The right side of the second pressing roll is retracted by the second right moving means, and then the left side of the second pressing roll is retracted by the second left moving means.
Evacuation control by
Coating equipment. In order to press the web so that the web can be applied to the coating means,
(3) The left side portion of the second pressing roll is moved from the retracted state to the pressing state by the second left moving unit, and the right side portion of the second pressing roll is then moved by the second right moving unit. Move from the retracted state to the pressed state,
Or
(4) The right side portion of the second pressing roll is moved from the retracted state to the pressing state by the first right moving means, and then the left side portion of the second pressing roll is moved by the second left moving means. Move from the retracted state to the pressed state,
The coating apparatus according to claim 5. The first pressing roll, the first supporting means, the second pressing roll, the second left moving means, and a main moving means for retreating the second right moving means from the coating means integrally,
The coating apparatus according to claim 5. The first support means includes
A first left moving means for moving from a pressing state to press the web to the coating means to a retracted state while rotatably supporting the left side of the first pressing roll;
First right moving means for moving from a pressing state to press the web to the coating means so as to be able to coat, while supporting a right side portion of the first pressing roll so as to be rotatable;
The coating apparatus of Claim 5 which has these. The control unit performs the retraction control when the web seam passes the position of the coating means.
The coating apparatus according to claim 1 or 5. The coating means is a coating roll or a coating head.
The coating apparatus according to claim 1 or 5.

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