JPH06226191A - Method and device for coating blade coater - Google Patents

Abstract

PURPOSE:To eliminate the stain and lowering of quality generated by the excessive application of a coating material on the paper joining sections at the time of frame changing and prevent the deformation generated by the friction heat of a blade in a blade coater carrying out the automatic paper joining in the traveling state. CONSTITUTION:In a blade coater in which a coating material is applied on the surface of a base paper traveling continuously through a backing roll 1 from a coating material feed section 3 and then the required coating quantity is set by the blade 6, a base paper 4 on an old base paper roll R1 in the coating operation and the base paper starting end of a new base paper on a new base paper roll R2 are joined together in the traveling state, and the application of the coating material from the coating material feed section 3 is discontinued when the above-said paper joining section is passed on the coating position, and the blade 6 is cooled by the water with which the base paper 4 is impregnated or the water to be sprayed directly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade coater used for the production of various coated papers, and more particularly to a blade coater provided with an automatic paper splicing mechanism for a base paper from an old base paper roll to a new base paper roll during coating. The present invention relates to a coating method and a coating device.

[0002]

2. Description of the Related Art Generally, a blade coater coats a surface of a base paper, which continuously runs through a backing roll, with a coating material from a coating material supply portion which is arranged to face the backing roll, and the surplus coating material is applied. Is scraped off with a blade to set the required coating amount. For example, in a two-roll type blade coater such as a flooded nip coater, as shown in FIG. 1, a backing roll 1 and an applicator roll 3 whose lower part is dipped in a paint tank 2 are vertically opposed to each other. The surface of the base paper 4 that continuously runs through between the two rolls 1 and 3 is coated with the coating material 5 applied to the applicator roll 3, and then the blade 6 is used to scrape off the excess coating material to achieve the required coating amount. Is set to. In addition, the excess paint scraped off by the blade 6 is collected in the receiving tank 2a, and the filter screen 7
After removing paper fibers and dust through the pump, the pump P returns it to the supply tank 8, and the paint 5 is supplied again to the paint tank 2 via the pump P.

As the blade coater, in addition to the above-mentioned two roll type, a fountain blade coater for discharging the paint from a slit-shaped opening along the paper width direction, a slit-shaped paint discharge port edge along the paper width direction. There are used various structures such as a short duel coater having a blade for setting a coating amount on its part, depending on the type of paper to be applied, the type and properties of coating material, the coating amount, and the like.

However, when coating of one base paper roll is completed in these blade coaters, the frame is switched to a new base paper roll, but if the coater is stopped for this frame replacement, a large time loss will occur. Will occur.
Therefore, in recent years, in order to improve the production efficiency, a mechanism is adopted in which the base paper of the old base paper roll R1 and the base end of the new base paper roll R2 are automatically spliced while maintaining the running state. This mechanism, as shown in the broken line frame A of FIG.
A new base paper roll R2 is arranged slightly downstream of the old base paper roll R1 being coated, and when the base paper 4 of the roll R1 is running low, the roll R2 is rotationally driven and its peripheral speed is synchronized with the base paper feed speed. After that, the running base paper 4 is pressed against the roll R2 by the pressing roll 9 as indicated by the phantom line to be bonded to the base paper of the roll R2 with an adhesive, and at the same time, the cutter R10 is used by the cutter 10 on the upstream side. By cutting the side base paper, the base paper is switched from the roll R1 to the roll R2 without interruption of the feeding. When the splicing is completed, the roll R1 is removed, the roll R2 being fed out of the raw paper is automatically moved to that position, and a new raw paper roll is arranged at the original position of the roll R2.
Further, the starting end portion of the roll R2 is temporarily fixed with a small adhesive label in order to prevent loosening during the rotation, and the temporary fixing is released by breaking the label at the time of adhesion.

However, when the above-mentioned paper splicing mechanism is adopted, a step is formed at the front and rear ends of the seam where two sheets of old and new paper are overlapped with each other with an adhesive, and an excessive amount of paint adheres to this step. As the result is poor drying, the paint adheres to the surface of various roll cylinders and dryer rolls that come into contact with the coated surface of the paper in the subsequent traveling steps from the coating part and becomes dirty, and the adhered paint forms a dregs. However, there is a problem in that it reattaches to the coated surface of the paper and deteriorates the quality, and the seam portion is twice as thick as the other portions, so that it is especially a double roll type blade coater. However, there is a problem that a paper piece is likely to occur when passing between the applicator roll 3 and the backing roll 1.

Therefore, the present applicant has previously filed Japanese Patent Application No. 3-285.
No. 42, in a two-roll type blade coater, the applicator roll is separated from the backing roll for a certain period of time when the seam of the base paper passes through the coating section, so that the gap between both rolls is temporarily expanded. Therefore, there is proposed a gap adjusting device capable of solving the problems of stains, quality deterioration, and paper breakage due to the above-mentioned excess paint when changing frames.

[0007]

However, when the applicator roll is temporarily separated from the backing roll during frame changing as proposed above, the portion including the seam of the raw paper 4 passing therethrough generally has a low raw paper running speed. Since it is a high speed such as 800 m / min or more, it reaches a considerable length, but since this passing part makes sliding contact with the blade in a dry state without coating, the blade is burned and softened by friction heat, After the coating is restarted, the coating profile becomes uneven in the paper width direction after the coating is resumed, resulting in poor coating quality and severe wear of the blade, which necessitates early blade replacement. It turned out to cause various problems. However, such a problem also applies to other blade coaters such as a fountain blade coater and a short duel coater even when the coating in the coating material supply section is stopped when changing the frame.

It is possible to separate the blade from the base paper at the time of changing the frame in order to avoid the burning of the blade due to the above-mentioned sliding contact, but generally, the blade extends along the paper width direction depending on various coating conditions and paper quality. Since it is necessary to finely adjust the contact pressure, it is extremely difficult for the movable type to maintain the set adjustment state.

In view of the above situation, the present invention can avoid contamination and deterioration of quality due to excess paint at the splicing portion when changing frames in a blade coater equipped with a mechanism for automatically splicing while running. An object of the present invention is to provide a coating method and a coating device capable of preventing deformation and wear of a blade due to frictional heat.

[0010]

In order to achieve the above object, a coating method for a blade coater according to claim 1 of the present invention comprises a backing roll 1 and a backing roll 1. In the blade coater in which the coating material 5 is applied from the coating material supply unit 3 disposed opposite to the base material, and then the required coating amount is set by the blade 6, the base paper 4 of the old base paper roll R1 and the base paper of the new base paper roll R2 are being coated. The starting end portion is spliced in a running state, and the coating of the coating material 5 by the coating material supply portion 3 is stopped for a certain period of time when the coating portion passes through the coating position, and the coating is stopped during the suspension. The blade 6 is cooled by water with which the base paper 4 is impregnated or directly sprayed with water.

According to a second aspect of the present invention, in the coating method according to the first aspect, the coating material supply portion is an applicator roll 1 whose lower portion is immersed in the coating material tank 2, and the paper splicing portion passes through the coating position. The coating composition is stopped by separating the applicator roll 1 from the backing roll 3 for a certain time.

According to a third aspect of the present invention, in the coating method according to the first aspect, the fountain 2 in which the coating material supply section discharges the coating material 5 from a slit-shaped coating material discharge port 22 along the paper width direction.
1 and adopts a configuration in which the discharge of the paint from the discharge port 22 is stopped for a certain period of time when the paper splicing part passes through the coating position.

According to a fourth aspect of the present invention, in the coating method according to the first aspect, the coating material supply portion is provided with a slit-shaped coating material discharge port 24 along the paper width direction, and the coating amount is applied to the edge portion of the discharge port 24. The short dwell applicator 23 has a blade 6 to be set, and employs a configuration in which the discharge of the paint from the discharge port 24 is stopped only for a certain time when the paper splicing part passes through the coating position.

On the other hand, the coating device for a blade coater according to a fifth aspect of the present invention comprises an applicator roll 3 and a backing roll 1 which are arranged opposite to each other, and a surface of a base paper 4 which runs continuously between the rolls 1 and 3. A blade 6 for measuring and coating the coating material 5 applied by the applicator roll 3,
New base paper roll R2 on base paper 4 of old base paper roll R1 being coated
Automatic paper splicing mechanism A that splices the starting end of the base paper in the running state
In a blade coater equipped with, the applicator roll displacing means 14 for displacing the applicator roll 3 with respect to the backing roll 1 in the separating / contacting direction, and water on the base paper 4 which is installed upstream of the blade 6 and runs. Water supply means 16 to be impregnated and operation control for separating the applicator roll 3 from the backing roll 1 and operating the water supply means 16 only for a certain time when the paper splice portion passes the coating position during the paper splice. Means 17
It adopts a configuration that includes and.

[0015]

When the frame is changed, the automatic paper splicing mechanism A is operated to splice the paper from the old base paper roll R1 to the new base paper roll R2 while the traveling state is maintained, but the coating in the paint supply unit is stopped. Therefore, the paint 5 is not applied to the portion including the seam of the base paper 4 passing between the rolls during this period. Since the blade 6 is cooled by water while the coating is stopped and the temperature rise due to the friction of the blade 6 with the base paper is suppressed, there is no possibility that the blade 6 is burned and softened and deformed.

In order to stop the coating at the time of changing the frame, in the two-roll type blade coater, the applicator roll 3 which is a paint supply section is separated from the backing roll 1.
Further, in the fountain blade coater or the short dwell coater, the discharge of the coating material 5 from the slit-shaped discharge port may be stopped. Further, in order to cool the blade 6 with water, water is applied to the continuously running base paper 4 at a position of the blade 6 or upstream thereof by an appropriate means while the coating of the paint 5 is stopped at the time of changing the frame. It is impregnated or water is sprayed directly onto the blade 6. However, when the base paper 4 is impregnated with water as in the former case, the base paper 4 is brought into sliding contact with the plate 6 in a wet state, so that the sliding action is caused by the lubricating action in addition to the cooling action by water. And the friction between the blades 6 becomes low and the temperature rise of the blades 6 is suppressed more effectively, and the blades 6 wear less. As a means for impregnating the base paper 4 with water,
Spraying water on the surface of the base paper 4 with a water jet nozzle,
Various methods such as contacting the base paper 4 with a roll impregnated or coated with water can be adopted. A water jet nozzle may be used to spray water onto the blade 6.

[0017]

FIG. 2 is a first embodiment in which the present invention is applied to a flooded nip coater which is a two-roll type blade coater, FIG. 3 is a second embodiment in which it is also applied to a flooded nip coater, and FIG. Main parts of these blade coaters are shown. Since the basic structure of these blade coaters is as described above with reference to FIG. 1, the description thereof is omitted here.

In the blade coaters of the first and second embodiments, the backing roll 1 is attached to the upper part of the machine frame 11, and the applicator roll 3 is arranged below the lower part of the applicator roll 3 in the coating tank 2. . Reference numeral 12 is a support rod for the applicator roll 3, and a pair of left and right is arranged on both sides of the paint tank 2.
The shaft 3a of the applicator roll 3 is rotatably mounted at the intermediate portion of the shaft 3a. Further, an elevating air cylinder 13 is pivotally attached to the lower part of the machine frame 11 at its base end side, and the tip end of its piston rod 13a is pivotally attached to a position near the free end of the support rod 12 via a pin 13b. The operation of the air cylinder 13 causes the support rod 12 to rotate about the pivot 12a, so that the applicator roll 3 is moved up and down. Each support rod 12
A hydraulic cylinder 14 is fixedly mounted on the upper surface of the free end side of the machine.
1a is arranged so as to abut, and the downward surface 1
A gap setting worm jack 15 is fixedly installed on 1a,
The tip of the jack rod 15a is arranged so as to come into contact with the upper surface of the support rod 12 on the free end side.

In the blade coater of the first embodiment, however, as shown in FIG. 2, a water guiding pipe 16a equipped with a water jet nozzle 16 is attached to the base paper 4 via a mounting frame 19 at a position before the coating portion. It is arranged horizontally along the width direction,
At the position where the traveling base paper 4 contacts the backing roll 1, water sprayed from the nozzle 16 is set to be sprayed on the surface of the base paper 4 on the coating side. Further, in the blade coater of the second embodiment, as shown in FIG. 3, a water guide pipe 16a having a similar water injection nozzle 16 is arranged horizontally near the blade 6 along the width direction of the base paper 4. The water sprayed from the nozzle 16 is set to be sprayed on the side surface of the blade 6.
In addition, the injection nozzle 16 is, as shown in FIG.
A large number are provided at predetermined intervals along the length direction of 6.

As shown in FIG. 5, the blade coaters of the first and second embodiments are provided with an operation control device 17, and the residual amount of the base paper becomes a predetermined value in the arrangement part of the base paper roll R1. At this time, a sensor 18 that detects this and outputs a detection signal is installed. The applicator roll 3 is set so that its rotation speed can be adjusted. Reference numeral 20 shown in FIG.
0a is a cylinder for driving the same, and WP shown in FIG.
A pump for supplying water to 6a.

In the above structure, the applicator roll 3 is moved by the lifting air cylinder 13 into the backing roll 1.
It is supported while being elastically biased to the side, and the gap setting worm jack 15 serves as a stopper to prevent the applicator roll 3 from approaching the backing roll 1 and set the gap between both rolls 1, 3 to a normal value. ing. The normal value is, for example, about 200 to 300 μm when the thickness of the base paper 4 is about 100 μm. On the other hand, as shown in FIG. 5, the hydraulic cylinder 14 has the piston rod 14 when the solenoids SOL1 and SOL2 of the operation switching valve V are OFF and the hydraulic pump OP is stopped.
A slight gap is provided between the tip of a and the downward surface 11a.

The base paper roll R1 is coated (see FIGS. 1 and 4).
The gap is kept at a normal value until the remaining base paper 4 becomes low, and the backing roll 1 and the applicator roll 3 that rotationally drive the base paper 4 fed from the roll R1.
The coating material 5 pumped from the coating material tank 2 to the surface of the applicator roll 3 is applied to the surface of the base paper 4 by continuously traveling through the blade 6 and the surplus portion of the coating material.
It is scraped off and set to a predetermined coating amount.

As shown in FIG. 5, when the base paper 4 of the base paper roll R1 is running low, the sensor 18 which detects the remaining base paper 4 outputs a detection signal, and the operation control device 17 causes the new base paper roll R2 to detect the detection signal. In addition to rotationally driving, the command unit 17a of the control device 17 sends an operation signal to the hydraulic pump OP. Next, after the peripheral speed of the new base paper roll R2 is synchronized with the feed speed of the base paper 4, the pressing roll 9 and the cutter 10 are driven by a command of the operation control device 17 to drive the base paper 4 and the base end of the new base paper roll R2. Paper splicing is performed, but based on the setting of the timer incorporated in the operation control device 17, the rotation speed of the applicator roll 3 is gradually reduced from a step several seconds faster than the paper splicing, and the paper splicing is slightly slower than the paper splicing. Fast (about 1 second) operation switching valve V
And a water pump WP, an operation signal is transmitted to the solenoid S
When OL1 is turned on, the hydraulic cylinder 14 is extended and driven,
When the applicator roll 3 descends against the urging force of the lifting air cylinder 13 and the gap between the applicator roll 3 and the backing roll 1 is, for example, about 800 μm when the thickness of the base paper 4 is about 100 μm.
While expanding to about 1000 μm, the water jet nozzle 16 ...
More water spouts out and impregnates the base paper 4 with this water in the first embodiment, and wets the blade 6 in the second embodiment to cool it.

By setting the above timer, the descending state of the applicator roll 3 is maintained for about 10 seconds, during which the part of the base paper 4 including the seam passes between both rolls 1 and 3 in contact with only the backing roll 1 and the paint 5 Is in sliding contact with the blade 6 without being coated. However, in the first embodiment, the uncoated base paper 4 is in a wet state in which it is impregnated with water, and has better sliding and lower friction as compared with the case of sliding contact in a dry state, and the cooling effect by water is obtained. Therefore, the temperature rise of the blade 6 due to the sliding contact is suppressed. On the other hand, in the second embodiment, the uncoated base paper 4 is brought into sliding contact with the blade 6 in a dry state, but the generated frictional heat is removed by exchanging heat with the water sprayed on the blade 6 itself. Therefore, the temperature rise of the blade 6 is also suppressed. Therefore, in any case, the blade 6 will not be burnt and deformed into a wavy shape or the like when the frame is changed.

Thus, after the portion of the base paper 4 including the joint has passed between the rolls 1 and 3, the operation switching valve V turns off the solenoid SOL1 in response to a command from the control device 17.
SOL2 is switched to be turned on, and the water supply pump WP is stopped with a delay of several seconds. Then, the operation of the operation switching valve V causes the hydraulic cylinder 14 to retreat, and the accumulated force of the lifting air cylinder 13 causes the applicator roll 3 to rise to the regulation position by the gap setting worm jack 15 and return to the original state. At that time, both solenoids SOL1 and SOL2 are turned off, and the hydraulic cylinder OP is also stopped. After that, coating is performed through the normal gap until the base paper 4 of the base paper roll R2 is low. In this coating, since the blade 6 maintains the same favorable adjustment state as before the frame change without causing deformation, a good coating quality that is the same as before the frame change can be obtained.

The applicator roll 3 has a rotation speed of a fraction of that during coating in order to reliably prevent the coating material 5 from adhering to the base paper 4 passing between the rolls 1 and 3 in the lowered state. Although it is dropped to a certain degree, it is set to return to the rotation speed at the time of coating before rising to the original coating position so that the original coating state can be obtained as soon as the coating is restarted. However, it is also possible to increase the descending degree of the applicator roll 3 so as to maintain the same rotation speed during coating even when changing the frame. Also, if multiple coater bodies are installed in the base paper running route for double-sided coating or overcoating,
The subsequent hydraulic cylinders 14 of the coater body may be set to operate sequentially in the same manner as described above with a required time lag.

FIG. 6 shows a third embodiment in which the present invention is applied to a fountain blade coater. In this coater,
Although the base paper 4 contacts the backing roll 1 and runs continuously,
Fountain 2 facing the backing roll 1
The coating material 5 is coated on the surface of the base paper 4 by 1, and the surplus portion is scraped off by the blade 6 to set a required coating amount. Fountain 21 above
Is a horizontally long coating chamber that is long in the direction perpendicular to the paper surface of the drawing, that is, in the paper width direction of the base paper 4, has a paint chamber 21a that extends substantially the entire length inside, and has a slightly pointed end in the paper width direction. A slit-shaped paint discharge port 22 is provided along the discharge port 22, and the paint discharge port 22 and the paint chamber 21a are communicated with each other over the entire length of the discharge port 22 by a discharge path 21b. To jet.

FIG. 7 shows a fourth embodiment in which the present invention is applied to a short duel coater. In this coater, the base paper 4 runs continuously in contact with the backing roll 1, and the coating material 5 is applied by the short dwell applicator 23 arranged facing the backing roll 1. The applicator 23 uses the paint 5 supplied into the chamber 23a.
Is excessively discharged from the slit-shaped paint discharge port 24 along the paper width direction, the required coating amount is set by the blade 6 forming the trailing edge of the discharge port 24, and the excess paint 5 is discharged in front of the discharge port 24. It is set so that it overflows from between the baffle 25 and the backing roll 1 forming an edge and is returned to the recovery tank 26 via the guide plate 26a. The applicator 23 is used for the piston rod 2 of a cylinder (not shown).
Due to the retracting operation of 7, the whole is tilted to the right and separated from the coating position shown in the drawing, and the piston rod 2 of the cylinder 28
The front wall portion 23b is tilted by the expansion and contraction operation of 8a, so that the chamber 23a is opened and closed.

In both the fountain blade coater of the third embodiment and the short dwell coater of the fourth embodiment, the water jet nozzle 16 is provided at the front position of the coating section as in the first embodiment. The water conduit 16a is arranged horizontally along the width direction of the base paper 4, and at the position where the running base paper 4 contacts the backing roll 1, the water sprayed from the nozzle 16 is the surface of the base paper 4 on the coating side. To be sprayed on. Although not shown in the drawings, both coaters are provided with an automatic paper splicing mechanism A (see FIG. 1) on the supply side of the raw paper 4 as in the flooded nip coaters of the first and second embodiments. ing.

However, in the frame changing of these third and fourth embodiments, the fountain 21 or the short dwell applicator 23 is transferred to the fountain 21 or the short dwell applicator 23 only for a certain time when the paper splicing part of the continuously running base paper 4 passes through the coating part. The supply of the paint 5 is stopped and the discharge of the paint from the paint discharge ports 22 and 24 is stopped. At the same time, water is sprayed from the water spray nozzle 16 to impregnate the base paper 4. Therefore, as in the first embodiment, the temperature rise of the blade 6 due to the sliding contact with the base paper 4 when changing the frame is suppressed, and the blade 6 is not burned and deformed into a wavy shape.

When the portion of the base paper 4 including the seam passes through the coating portion, the spraying of water from the water jet nozzle 16 is stopped and the supply of the coating material 5 to the fountain 21 or the short dwell applicator 23 is started to apply the coating material. Work is resumed. It should be noted that the timings of the discharge stop / restart of the paint 5 and the spray start / spray stop of the water injection nozzle 16 in the frame changing of the third and fourth embodiments are similar to those of the first and second embodiments. A device and a timer may be used.

In the above-mentioned first, third and fourth embodiments, a water jet nozzle is adopted as a water supply means for impregnating the base paper 4 with water at the time of changing the frame. For example, a roll impregnated with water or a roll impregnated with water. Other means such as contacting the base paper 4 with the base paper 4 can also be adopted. Further, in the third and fourth embodiments, the base paper 4 is impregnated with water at the time of changing the frame, but these blade coaters also have a configuration in which the blade 6 is directly cooled with water as in the second embodiment. can do. Further, the present invention can be applied to various blade coaters other than those exemplified, and the structures and detailed configurations of the automatic paper splicing mechanism, the applicator roll displacement means in the two roll type, the operation control mechanism and the like are various other than the examples. The setting can be changed, and the timing of the operation of each part in the frame change may be appropriately set according to the type of the coater, the configuration of each part, and the coating conditions.

[0033]

According to the coating method of the first aspect of the present invention, in the blade coater provided with the paper splicing mechanism in the running state of the base paper, while the coating of the coating material is stopped in the coating material supply portion at the time of changing the frame. Since the part of the base paper including the seam passes through the coating position and the paint is not applied at this part, excess paint in the paper splice part is used in various roll cylinders and dryer rolls in the subsequent traveling process as in the past. On the coated surface of the paper, and the adhered paint does not deteriorate the quality by re-adhering to the coated surface of the paper, and the above-mentioned uncoated base paper is in sliding contact with the blade for setting the coating amount. Since the blade is cooled at this time, it is not softened and deformed due to frictional heat of the blade, so that the blade can be used in a good state for a long period of time, and stable and high-quality coated paper can be manufactured.

According to the coating method of the second aspect, in a two-roll type blade coater having a backing roll and an applicator roll, it is possible to avoid stains and deterioration of quality due to excess paint on the splicing portion of the base paper, and at the same time, to make a frame. There is an advantage that softening deformation of the blade due to frictional heat at the time of replacement can be prevented, and further, paper breakage at the joint portion will not occur.

According to the coating method of claim 3, in the fountain blade coater, it is possible to avoid stains and deterioration of the quality of the splicing portion of the base paper due to excess paint, and to prevent softening and deformation of the blade due to frictional heat during frame replacement. There is an advantage that you can.

According to the coating method of claim 4, in the short dwell coater, it is possible to avoid the stain and deterioration of the quality of the splicing portion of the base paper due to the excess paint, and to prevent the softening deformation of the blade due to the frictional heat at the time of changing the frame. There is an advantage.

According to the coating apparatus of the fifth aspect, as a two-roll type blade coater, the blade is softened by frictional heat at the time of frame changing without causing stains or deterioration of quality due to excess paint on the splicing portion of the base paper. It is possible to provide a member that is not deformed, is less likely to be worn, and can reliably prevent paper breakage when the seam portion passes between the backing roll and the applicator roll.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a two-roll type blade coater to which the present invention is applied.

FIG. 2 is a side view of a coater main body in a two-roll type blade coater according to the first embodiment of the present invention.

FIG. 3 is a side view of a coater main body in a two-roll type blade coater according to the second embodiment.

FIG. 4 is a partially cutaway side view of a main part of the coater body of the first and second embodiments.

FIG. 5 is an operation principle diagram of the first and second embodiments.

FIG. 6 is a schematic vertical cross-sectional side view of a coater main body in a fountain blade coater according to a third embodiment of the present invention.

FIG. 7 is a schematic vertical sectional side view of a part of a coater main body in a short duel coater according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 Backing Roll 3 Applicator Roll (Paint Supply Unit) 4 Base Paper 5 Paint 6 Blade 14 Hydraulic Cylinder (Applicator Roll Displacement Means) 16 Water Injection Nozzle (Water Supply Means) 17 Operation Control Device (Operation Control Means) 21 Fountain 22 Paint Discharge Port 23 Short Duel Applicator 24 Paint discharge port A Automatic paper splicing mechanism R1 Old base paper roll R2 New base paper roll

[Procedure amendment]

[Submission date] March 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

As the blade coater, in addition to the above-mentioned two roll type, a fountain blade coater for discharging the paint from a slit-shaped opening along the paper width direction, a slit-shaped paint discharge port edge along the paper width direction. short Duel coater comprising a blade for coating amounts set part, the type of paper to be applied, the paint type and properties, are used in various structures depending on the coating amount, etc., and a blade
In addition to the general plate-like shape as a rod-shaped rod
Ru mower those using a blade.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

However, when the applicator roll is temporarily separated from the backing roll during frame changing as proposed above, the portion including the seam of the raw paper 4 passing therethrough generally has a low raw paper running speed. Since it is a high speed such as 800 m / min or more, it reaches a considerable length, but since this passing part makes sliding contact with the blade in a dry state without coating, the blade is burned and softened by friction heat, After the coating is restarted, the coating profile becomes uneven in the paper width direction after the coating is resumed, resulting in poor coating quality and severe wear of the blade, which necessitates early blade replacement. It turned out to cause various problems. However, such a problem is caused by other blade coaters such as fountain blade coaters and short duel coaters, and even rods.
In a coater or the like using a blade, the same applies when the coating in the coating material supply section is stopped when changing the frame.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

According to a third aspect of the present invention, in the coating method according to the first aspect, the fountain 2 in which the coating material supply section discharges the coating material 5 from a slit-shaped coating material discharge port 22 along the paper width direction.
1 and whether the discharge of the paint from the discharge port 22 is stopped for a certain period of time when the paper splicing part passes through the coating position , and
And / or adopting a configuration of retracting the fountain .

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

According to a fourth aspect of the present invention, in the coating method according to the first aspect, the coating material supply portion is provided with a slit-shaped coating material discharge port 24 along the paper width direction, and the coating amount is applied to the edge portion of the discharge port 24. It is a short dwell applicator 23 having a blade 6 to be set , and a structure for stopping the discharge of the paint from the discharge port 24 and / or retracting the applicator for a certain time when the paper splicing part passes through the coating position. <br/> Adopting the success.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In order to stop the coating at the time of changing the frame, in the two-roll type blade coater, the applicator roll 3 which is a paint supply section is separated from the backing roll 1.
The Fountain blur - the Dokota or short duel coater to stop discharge of the coating material 5 from the slit-shaped discharge port Luke, and / or fountain or a short du
El applicator may be Re is retracted. Further, in order to cool the blade 6 with water, water is applied to the continuously running base paper 4 at a position of the blade 6 or upstream thereof by an appropriate means while the coating of the paint 5 is stopped at the time of changing the frame. It is impregnated or water is sprayed directly onto the blade 6.
However, when the base paper 4 is impregnated with water as in the former case, the base paper 4 is brought into sliding contact with the plate 6 in a wet state, so that the sliding action is caused by the lubricating action in addition to the cooling action by water. And the friction between the blades 6 becomes low and the temperature rise of the blades 6 is suppressed more effectively, and the blades 6 wear less. As a means for impregnating the base paper 4 with water, various methods such as spraying water onto the surface of the base paper 4 with a water jet nozzle, or contacting a roll impregnated with or adhering water with the base paper 4 are available. Can be adopted. A water jet nozzle may be used to spray water onto the blade 6.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

In the frame changing of the third and fourth embodiments, however, the fountain 21 or the short dwell applicator 23 is moved to the fountain 21 or the short dwell applicator 23 for a certain period of time when the paper splicing portion of the continuously running base paper 4 passes through the coating portion. Of the coating material 5 is stopped to stop the discharging of the coating material from the coating material discharge ports 22 and 24, or the coating material 5 is discharged to a position where it does not hit the base paper 4.
Fountain 21 or Short Duel Applicator 2
3 back to the backing roll 1 or
This retreat and the supply of the paint 5 are stopped at the same time. That
With these operations , water is jetted from the water jet nozzle 16 to impregnate the base paper 4. Therefore, as in the first embodiment, the temperature rise of the blade 6 due to the sliding contact with the base paper 4 when changing the frame is suppressed, and the blade 6 is not burned and deformed into a wavy shape.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

When the portion of the base paper 4 including the seam passes through the coating portion, the spraying of water from the water jet nozzle 16 is stopped and the fountain 21 or the short dwell applicator 23 is returned to the original coating state, that is, stopped. Doing
Fountain that started supplying paint 5 or had retreated
In front of the cord 21 or short dwell applicator 23
Or the advance and the start of the supply of paint 5 are performed at the same time.
Therefore, the coating is restarted. It should be noted that discharge of the paint 5 in the frame replacement of the third and fourth embodiments-restart of discharge,
As for the timing of the injection start-injection stop of the water injection nozzle 16, the same operation control device and timer as those in the first and second embodiments may be used.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

In the above-mentioned first, third and fourth embodiments, a water jet nozzle is adopted as a water supply means for impregnating the base paper 4 with water at the time of changing the frame. For example, a roll impregnated with water or a roll impregnated with water. Other means such as contacting the base paper 4 with the base paper 4 can also be adopted. Further, in the third and fourth embodiments, the base paper 4 is impregnated with water at the time of changing the frame, but these blade coaters also have a configuration in which the blade 6 is directly cooled with water as in the second embodiment. can do. Further, the present invention can be applied to various blade coaters other than those exemplified.
For example, it can be applied to a coater using a rod blade.
Can Rutotomoni, automatic web splicing mechanism, the applicator roll displacement means in the two-roll type, also may be changed variously set other than exemplified structures and detailed configurations such as operation control mechanism,
The timing of operation of each part in frame change may be set appropriately according to the type of the coater, the configuration of each part, and the coating conditions. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 1, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0032

[Correction method] Change

[Correction content]

In the above-mentioned first, third and fourth embodiments, a water jet nozzle is adopted as a water supply means for impregnating the base paper 4 with water at the time of changing the frame. For example, a roll impregnated with water or a roll impregnated with water. Other means such as contacting the base paper 4 with the base paper 4 can also be adopted. Further, in the third and fourth embodiments, the base paper 4 is impregnated with water at the time of changing the frame, but these blade coaters also have a configuration in which the blade 6 is directly cooled with water as in the second embodiment. can do. Other, first fact
Example flad dipped coater and third example fau
Set the coating amount like an integrated blade coater
The blade 6 separates from the paint supply section which coats the paint 5 on the paper surface.
In a coater that is placed in a separated position, the blade 6
Water supply means such as water injection nozzle 16 is installed in the holding mechanism of
Blow water from this water supply means to the base paper on the downstream side.
It may be configured as follows. Further, the present invention can be applied to various blade coaters other than those exemplified, for example, to a coater using a rod blade, an automatic paper splicing mechanism, an applicator roll displacement means in a two roll type, and an operation. The structure and the detailed configuration of the control mechanism and the like can be changed in various ways other than the examples, and the timing of the operation of each part in the frame change may be appropriately set according to the type of the coater, the configuration of each part, and the coating conditions.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B05D 3/00 F 8720-4D D21H 23/34

Claims (5)

[Claims] 1. A blade coater in which the surface of a base paper sheet that continuously travels through a backing roll is coated with a coating material from a coating material supply section which is arranged opposite to the backing roll, and then a required coating amount is set by a blade. The base paper of the old base paper roll being coated and the base end of the new base paper roll are spliced in a running state, and the paint is applied by the paint supply unit only for a certain period of time when the paper splicing part passes the coating position. A coating method for a blade coater, characterized in that the coating is stopped and the blade is cooled by water with which the base paper is impregnated or water sprayed directly while the coating is stopped. 2. A coating material supply part is an applicator roll having a lower part immersed in a coating material tank, and the applicator roll is separated from the backing roll for a certain period of time when the paper splicing part passes through the coating position. The method for coating a blade coater according to claim 1, wherein coating is stopped. 3. A fountain in which a paint supply section discharges paint from a slit-shaped paint discharge port extending in the paper width direction,
The blade coater coating method according to claim 1, wherein the discharge of the coating material from the discharge port is stopped only for a certain period of time when the paper splice portion passes through the coating position. 4. A short duel applicator in which a coating material supply section has a slit-shaped coating material discharge port extending in the paper width direction and a blade for setting a coating amount at the edge of the discharge port, wherein the paper splicing part is a coating section. The coating method for a blade coater according to claim 1, wherein the discharge of the coating material from the discharge port is stopped for a certain period of time when passing the position. 5. An applicator roll and a backing roll, which are arranged to face each other, a blade for setting a required coating amount of the coating material coated on the surface of the base paper which continuously runs between the both coating rolls, and a coating roller. In a blade coater equipped with an automatic paper splicing mechanism for splicing the starting end of the new raw paper roll to the raw paper of the old raw paper roll under construction, displacing the applicator roll with respect to the backing roll Applicator roll displacement means, the blade position or upstream of the blade position, a water jet nozzle for spraying water on the blade or the raw paper surface, and when the paper splicing part passes the coating position during the paper splicing Control for separating the applicator roll from the backing roll for a certain time and operating the water injection nozzle An apparatus for coating a blade coater, which comprises: