JPS622860B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating device for a film strip, paper, cloth, or a composite or processed product thereof (hereinafter referred to as a web).

Currently, in coating a web, which is a strip-shaped processed product, the web is run between a backing roll and a comma-shaped doctor knife that has an edge at one or several places on the outer circumferential surface of the roll, and while the web is being coated, the doctor knife This is done by forming a coating film on the surface. Incidentally, the web to which the resin liquid is applied has a joint part that is thicker than other parts, but when the joint part of the web passes through a doctor knife when coating the web, the joint part is exposed to the doctor knife. Problems such as the web getting stuck or the web breaking may occur. Therefore, conventionally, when the joint part of the web approaches the doctor knife, the operator visually checks it and jumps the doctor knife upward across the front and rear parts (approximately 5 to 10 meters) of the joint part, and when the joint part passes The doctor knife was returned to its original position and coating of the resin liquid was continued. However, although this can prevent problems such as the web from breaking, the gap between the web and the doctor knife increases while the doctor knife is jumping upwards, resulting in a large amount of resin liquid flowing out. ,
Accordingly, the amount of coating increases rapidly over the front and rear portions of the joint, and the amount of coating is 2 to 5 times the normal amount. For this reason, when drying the front and rear parts of the joint where a large amount of coating is applied in the subsequent drying process, the web speed must be significantly slowed down to increase the drying time, or more than a certain amount of coating liquid must be applied. It had to be removed, and the workability was extremely poor. Even with such operations, there are cases where the product is not completely dried, resulting in various inconveniences. Further, when the doctor knife is jumped, there is a problem that the coating amount becomes uneven before and after the doctor knife is jumped, resulting in poor restorability. Furthermore, the above-mentioned problem will not occur unless the supply of resin liquid is stopped and the coating is applied between the front and back parts of the joint part of the web, but in this case the web cannot be processed continuously and the workability is significantly reduced. be damaged.

In view of the above points, the present invention provides a location on the outer circumferential surface of a roll that is supported by a swingable adjustment arm or supported by a rotatable frame and is disposed opposite to the bucking roll, or A comma-shaped doctor knife that has edge portions at several places and a jumping mechanism that swings the adjustment arm with an actuator, or a comma-shaped doctor knife that moves the above-mentioned comma-shaped doctor knife at the same speed as the traveling web or at a speed close to this to the actuator. a rotation mechanism that rotates the web, a joint detector that detects the joint of the running web, a speed detector that detects the running speed of the web, and a link between the joint detector and the edge of the comma-shaped doctor knife. A setting section that presets a value corresponding to the web length of When the set value of the setting section is reached, the coating device is configured with a controller consisting of a control section that outputs a signal to operate the actuator of the jumping mechanism or rotation mechanism, and reduces the processing speed of the web. This makes it possible to maintain a constant coating amount of the resin liquid at all times.

The present invention will be described below with reference to embodiments shown in the drawings.

1 to 5, reference numeral 1 is a so-called comma-shaped doctor knife in which edge portions 2, 2 are formed by notching a part of the outer circumferential surface of the roll in the longitudinal direction, and the adjustment arm 23 in FIG. 3 is rotatably supported and can be moved in the vertical direction by swinging the adjustment arm 23, with one of the edge portions 2, 2 being in a vertically downward position facing the web. It is located. A bucking roll 4 is rotatably supported directly below the doctor knife 1, and a predetermined gap is formed between the bucking roll 4 and the doctor knife 1. 5
6 is a guide roll, and 6 is a web which is a belt-shaped processed material that is wrapped around the backing roll 4 and the guide roll 5 and inserted between the doctor knife 1 and the backing roll 4, and is transferred by an appropriate means to the joint part. 7 is thicker than other parts of the web 6. 8 is a dam plate, 9 is a side plate, and these plates 8 and 9 allow the coating liquid 1 to be
A liquid reservoir 11 of 0 is formed. In FIG. 2, 12 is a rotation mechanism for rotating the doctor knife 1 by a predetermined angle and restoring it, and 13 is an arm plate consisting of a disc part 13a and a mounting part 13b. The mounting portion 13b is suspended downward. 14 is an air cylinder whose base 15 is pivotally connected to a frame (not shown), and a U-shaped connecting fitting 18 is fixed to the tip of the piston rod 16, and this fitting 18 is attached to the mounting portion 13b of the arm plate 13. pin 1
It is pivoted by 7. 19 is the above connection fitting 18
By appropriately rotating the manual handle 20 using a stopper supported by an appropriate means at a position facing the arm plate 13, the protruding part 21 that contacts the side end surface of the mounting part 13b of the arm plate 13 is moved forward and backward, and normally the mounting part 13b in a fixed position. In Fig. 3, 22 is the doctor knife 1 mentioned above.
This is a jumping mechanism for moving vertically in the up and down direction. Reference numeral 23 denotes an adjustment arm to which the support shaft 3 of the doctor knife 1 is rotatably attached.One end of the adjustment arm 23 is rotatably attached to the fixed shaft 24, and the other end is a free end 25. 26 is a stopper member, and 27 is an actuator for swinging the adjustment arm 23. This uses, for example, a hydraulic cylinder 28, and the tip of the rod 29 is attached to the free end 25 of the adjustment arm 23. Then, the actuator 27 operates to rotate the adjustment arm 23 about the fixed shaft 24, thereby causing the doctor knife 1 to jump.

In FIG. 1, reference numeral 31 denotes a joint portion detector that detects the joint portion 7 of the traveling web 6 and outputs an operation signal. The sensor 32 or other means such as a thickness gauge may be used. Reference numeral 33 denotes a speed detector for detecting the running speed of the web 6, which uses, for example, a pulse generator or the like that generates constant pulses in accordance with the rotation of the bucking roll 4. In FIG. 4, 34 is a controller for operating the doctor knife 1, 35 is a gate provided between the speed detector 33 and the controller 34, and this gate 35 is used to operate the joint detector 31. Open at a traffic light. The controller 34 includes a setting section 36 and a control section 37 using, for example, a subtractive preset counter. A value corresponding to the web length in between is set in advance, and the joint part detector 31
When the feed size value of the web 6 reaches the set value of the setting section 36 by starting calculation of the output signal of the speed detector 33 based on the operation signal from the controller 37, the rotation mechanism 12 of the doctor knife 1 or , a signal is output to either one of the jumping mechanisms 22, whereby the mechanism 12 or 22 is activated to rotate the doctor knife 1, or
The doctor knife 1 is configured to jump upward.

In FIG. 5, 38 is the doctor knife 1
This is a gap adjustment mechanism for adjusting the gap between the backing roll 4 and the backing roll 4. This adjustment mechanism 38 adjusts the coating film 10' applied onto the web 6 by the doctor knife 1 depending on the running speed of the web 6 or the viscosity of the coating liquid 10 while the web 6 is running after being coated. Since the film thickness changes and becomes thinner over time, the doctor knife 1 and This is a mechanism for adjusting the gap between the bucking rolls 4. That is, in the gap adjustment mechanism 38, 39 is an actuator for swinging the adjustment arm 23, and this is an actuator 40 that supports the free end 25 of the adjustment arm 23.
, a member 41 provided with the adjusting rod 40 so as to be protrusive and retractable, and a motor 42 for operating the member 41. In FIG. 1, reference numeral 43 denotes a film thickness measuring device for measuring the thickness of the coating film 10' formed on the surface of the web 6 by the doctor knife 1;
is set at a predetermined position on the travel route. Reference numeral 44 in FIG. 5 is, for example, a digital gap measuring device, which is held by an appropriate means and is supported by the swing of a measuring rod 45 protruding from the base end of the adjusting arm 23 constituting the jumping mechanism 22. Detects the amount of movement,
The gap between the doctor knife 1 and the backing roll 4 is measured. 46 operates the actuator 39 to remove the doctor knife 1.
This is a controller for setting the gap between the doctor knife 1 and the backing roll 4 to a predetermined size, and the gap size between the doctor knife 1 and the backing roll 4 is set in advance in this controller When the film thickness of the formed coating film 10' is measured by the film thickness measuring device 43 and also by the gap measuring device 44 between the doctor knife 1 and the bucking roll 4, these two measured values are controlled. input to the device 46,
This measured value is compared with the above preset setting value, and if there is a difference between the two values, the controller 46 outputs an operation signal to the motor 42 of the actuator 39 to adjust the gap between the rolls. Also, if the measured value and the set value correspond, the controller 46 is configured not to output an operation signal. Note that the controller 46
The functions possessed by the controller 34 may be added to the controller 34.

Next, the operation of the present invention will be explained as follows. The operation of the doctor knife 1 is determined in advance by the switching means of the controller 34 according to the type of the web 6, etc. Also, the setting section 36 of the controller 34 has a joint section detector 31 and a web 6. A value corresponding to the web length between the edge portions 2 of the doctor knife 1 facing the side is set in advance.

When forming the coating film 10' on the web 6, the piston rod 16 of the air cylinder 14 is
by extending the mounting portion 13 of the arm plate 13.
b is brought into contact with the protruding part 21 of the stopper member 19, and one edge part 2 of the doctor knife 1 is placed in a lower position in advance to face the outer circumferential surface of the backing roll 4. Then, when the web 6 is run in the direction of the arrow shown in the figure by an appropriate means, the web 6 passes between the edge portion 2 of the doctor knife 1 and the backing roll 4 during the run, and during this passage, the web 6 is pushed by the doctor knife 1. A coating film 10' is formed on the surface of the web. Then, the joint portion 7 of the web 6 is detected by the joint portion detector 31, and the gate 35 is opened by the operation signal.
Then, the output signal from the speed detector 33 is input to the control unit 37 of the controller 34 via the gate 35 to start calculation, and when the feed dimension value of the web 6 reaches the setting value of the setting unit 36, The control unit 37 controls the rotation mechanism 12 of the doctor knife 1, or
A signal is output to either one of the jumping mechanisms 22. That is, first of all, talking about the case of the rotation mechanism 12, the air cylinder 14 is activated by the above signal.
operates, the piston rod 16 moves in and out,
As a result, the support shaft 3 rotates via the arm plate 13, and the doctor knife 1 is rotated by a predetermined angle in the direction of the arrow shown in the figure at the same speed as the traveling speed of the web 6, or at a speed close to it. Then, the edge portion 2 of the doctor knife 1 is located at a predetermined position on its side, and the arcuate surface 1' is aligned with the backing roll 4.
located opposite. In this way, just before the joint portion 7 of the web 6 passes, the doctor knife 1 rotates and its arcuate surface 1' faces the bucking roll 4, so the doctor knife 1 functions as a squeezing roll, and as a result, The joint portion 7 does not get caught on the edge portion 2 of the doctor knife 1, and passes smoothly between the arcuate surface 1' and the backing roll 4. As soon as the web 6 passes, the piston rod 16 of the air cylinder 14 automatically extends, and the edge portion 2 of the doctor knife 1 returns to its original vertically downward position so as to face the backing roll 4 again. Next, regarding the jumping mechanism 22, the actuator 2 is controlled by the output signal from the control section 37.
7 is activated, the adjustment arm 23 is rotated counterclockwise about the fixed shaft 24, and the edge portion 2 of the doctor knife 1 is lifted upward while facing the backing roll 4, and the web is 6
A gap larger than the thickness of the joint part 7 is formed, and as a result, the joint part 7 smoothly passes between the backing roll 4 without being caught by the edge part 2 of the doctor knife 1.
When the web 6 passes in this manner, the actuator 27 is operated and the doctor knife 1 returns to its original position before passing the joint portion 7. Alternatively, when a signal is output from the control section 37 to the rotating mechanism 12 or the jumping mechanism 22, each mechanism 12 or 22 is activated, and the doctor knife 1 returns to its original position immediately after the joint section 7 passes. do.

Furthermore, when the coating film 10' is formed on the web 6, the film thickness is measured by a film thickness measuring device 43, and at the same time, the gap between the doctor knife 1 and the backing roll 4 is measured by a gap measuring device 44. The measured values are input to the controller 46, and the measured value set in advance in the controller 46 is compared with the measured value. If there is a difference between the two values, the controller 46 activates the measured value. An operation signal is output to the yuator 39, and the doctor knife 1 is moved by a predetermined amount in the vertical direction by the adjustment arm 23 that swings about the fixed shaft 24, and if the set value and the measured value correspond to each other, a signal is sent from the controller 46. The output of the doctor knife 1 is stopped, and the doctor knife 1 is held with an appropriate gap between it and the backing roll 4.

As described above, the present invention provides a method for controlling one or several locations on the outer circumferential surface of a bucking roll supported by a swingable adjustment arm or rotatably supported by a frame and disposed opposite to each other on a bucking roll. A comma-shaped doctor knife having edges at certain points and a jumping mechanism in which the adjusting arm is swung by an actuator, or the comma-shaped doctor knife is moved by an actuator at the same speed as the running web or at a speed close to this. a rotation mechanism that rotates the web, a joint detector that detects the joint of the running web, a speed detector that detects the running speed of the web, and a link between the joint detector and the edge of the comma-shaped doctor knife. When a setting section that presets a value corresponding to the length of the web and a signal from the joint section detector are input, calculation of the output signal of the speed detector is started, and the web feed dimension value is set as above. Since the web coating apparatus is configured with a controller consisting of a control unit that outputs a signal to operate the actuator of the jumping mechanism or rotation mechanism when the set value of the setting unit is reached, Without applying more resin liquid than necessary,
The amount of resin liquid applied can always be maintained almost constant. In addition, since the doctor knife can be rotated or jumped by a predetermined angle depending on the type or property of the web, the joint part can be caught by the doctor knife and pass smoothly between the rolls without being cut. The coating amount is checked or corrected automatically after passing through, and the system can be maintained in the same state as in normal operation. Therefore, there is no need for special operating methods or processing to pass through the joint as in the past, various troubles are prevented, and continuous processing of the web is possible without reducing processing speed. As a result, work efficiency can be significantly improved.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing an embodiment of the present invention, Figure 2 is an explanatory diagram showing an embodiment of the present invention.
The figure is an explanatory perspective view, FIG. 3 is an explanatory diagram showing the jumping mechanism of the doctor knife, FIG. 4 is an operational block diagram of the doctor knife, and FIG. 5 is an explanatory diagram showing the gap adjustment mechanism of the doctor knife. be. 1...Doctor knife, 2, 2...Edge part,
6...Web, 7...Joint part, 12...Rotating mechanism, 22...Jumping mechanism, 31...Joint part detector, 33...Speed detector, 34...
...Controller, 36...Setting section, 37...Control section.

Claims (1)

[Claims] 1. Supported by a swingable adjustment arm, or
One location on the outer peripheral surface of the roll, which is rotatably supported by the frame and placed opposite to the bucking roll;
Alternatively, a comma-shaped doctor knife having edge portions in several places, and a jumping mechanism that swings the adjustment arm using an actuator, or the comma-shaped doctor knife runs at the same speed as the web, or
a rotation mechanism that is rotated by an actuator at a speed close to this; a joint portion detector that detects the joint portion of the traveling web; a speed detector that detects the traveling speed of the web; and the joint portion detector. A setting section that presets a value corresponding to the length of the web between the edges of the comma-shaped doctor knife, and a signal from the joint section detector mentioned above are input to start calculating the output signal of the speed detector. and a controller comprising a control section that outputs a signal for operating the actuator of the jumping mechanism or the rotating mechanism when the web feed dimension value reaches the setting value of the setting section. Web coating equipment.