JPS63194766A - Coater - Google Patents

Abstract

PURPOSE:To enable high-precision coating, by guiding uncoated excess coating fluid to a guiding and discharging face for excess coating fluid without bringing it into contact with the coating fluid under lifting through a guiding passage of coating fluid and discharging it. CONSTITUTION:A transfer roll 13 for coating fluid, a coating fluid feeder 14 for feeding coating fluid to the outer circumferential face of the roll 13 and a passage A for leading a sheet approaching the outer circumferential face of the roll 13 are provided. A guiding face 21a for coating fluid opposite to the outer circumferential face of the roll 13 is elongated to the terminal position approaching the passage A from the feeder 14 while forming a guiding passage 22 for coating liquid between it and the outer circumferential face of the roll 13 and a discharging and guiding face 25 for excess coating fluid is elongated from the terminal position of the guiding face 21a. As a result, the distribution of coating thickness of coating fluid applied on the sheet is made uniform and high-precision coating is enabled. Further since air is not involved into coating fluid, coating free from fault is enabled. Furthermore high-speed coating is enabled and productivity can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a coating device equipped with a coating liquid transfer roller.

[Prior Art] Coating devices equipped with coating liquid transfer rollers can be broadly classified into post-metering type and pre-metering type.

As an example of a post-metering type coating device, there is one comprising a kiss coat type coating device 1 and a metering bar device 2, as shown in FIG. Kiss coat type coating device 1
The coating liquid transfer roll 3 is driven at an appropriate rotational speed, the coating liquid supply pan 4 immerses the lower part of the coating liquid transfer roll 3, and the sheet conveyance path A that approaches the outer peripheral surface of the coating liquid transfer roll 3. and a guide roll 5.5 arranged to form the same. The rotating coating liquid transfer roller 3 lifts the coating liquid M1 that has adhered to the outer circumferential surface 3a while being immersed in the coating liquid supply pan 4, and transfers the coating liquid M1 onto the sheet S passing through the sheet conveyance path A.
Apply a large amount of 2. While the sheet S passes over the metering bar device 2, the coating liquid M2 on the sheet S is measured by the metering bar device 2, and the excess coating liquid is removed from the sheet S. Coating liquid MS remains.

As shown in FIG. 11, an example of the pre-metering type coating device 5 includes a coating liquid transfer roll 6 that is forcibly driven at an appropriate rotational speed, and a coating liquid supply pan 7 that immerses the upper part of the coating liquid transfer roll 6. , a metering roll 8 which is arranged to move forward and backward toward the outer peripheral surface of the coating liquid transfer roll 6 and is forcibly driven at an appropriate rotational speed in the same direction as the rotational direction of the coating liquid transfer roll 6; and a coating liquid transfer roll. There is a reverse roll coating device that includes a backup roll 9 which is arranged to move forward and backward toward the outer peripheral surface of the coating liquid transfer roll 6 and is forcibly driven at an appropriate rotational speed in the same direction as the rotational direction of the coating liquid transfer roll 6. When the coating liquid M1 lifted by the rotating coating liquid transfer roller 6 passes through the gap G formed between the coating liquid transfer roller 6 and the metering roll 8, the coating liquid M1 is transferred to a predetermined thickness by the metering roll 8. be weighed. The measured coating liquid M6 is transferred and applied onto the sheet S held by the backup roll 9.

[Problems to be Solved by the Invention] However, the post-metering type coating device 1 shown in FIG. 10 has the following problems.

(al) The coating liquid M which is lifted from the coating liquid supply pan 4 while adhering to the outer surface 3a of the rotating coating liquid transfer roller 3 is equal to the lifting amount per unit time of the coating liquid M2 to be applied to the sheet S. The reason why a large amount of coating liquid M1 is lifted by the coating liquid transfer roller 3 in this way is to ensure that coating liquid M2 is applied over the entire width of the application area of the sheet S. By the way, when a large amount of coating liquid M1 is lifted by the coating liquid transfer roller 3, a coating liquid portion B is formed in the area where the roll outer surface 3a and the sheet S are close to each other, and the coating liquid is The coating liquid M3 in the coating part B drips down on the roll outer surface 3a as a sawtooth-shaped return coating liquid M4 due to its own weight.However, on the inlet side of the coating liquid part B, the roll outer surface 3a
As the coating liquid M1 that adheres to the top and is lifted overlaps with the sawtooth-shaped return coating liquid M4 that flows down, the cross section of the polymerized layer of coating liquids M1 and M4 becomes wavy, as shown in FIG. . As a result, the shearing force applied to the coating liquid becomes uneven, and the thickness distribution of the coating liquid Ml coexisting with the coating liquid M3 in the coating liquid area B becomes uneven along the roll direction, and as a result, the sheet The coating thickness distribution of the coating liquid M2 applied to S along the roll direction also becomes non-uniform. and,
Even if the coating liquid M2 applied unevenly to the sheet S is measured by the metering bar device 2, the coating liquid M remaining on the sheet S
It was not possible to make the coating thickness distribution of No. 5 uniform.

(b) The returned coating liquid M4 dripping down on the roll outer surface 3a in a sawtooth shape may involve air when dripping down. The trapped air forms bubbles and enters the coating liquid M1 that is being lifted, and is transferred to the sheet S together with the coating liquid M2, causing coating defects.

(C1 In recent years, there has been a demand to increase the conveyance speed of the sheet S in order to improve productivity. However, when the coating liquid transfer roll 3 is rotated at high speed, the coating liquid M1 attached to the roll surface
Since the coating liquid is scattered by centrifugal force, there is a limit to the high speed rotation of the coating liquid transfer roll 3. Therefore, in the past, there was a limit to meeting the above-mentioned demand for higher speeds.

Furthermore, the pre-metering type coating device 7 shown in FIG. 11 also had problems similar to those described in (al to fc) above.

The present invention aims to provide a coating device for solving the above problems.

[Means for Solving Problems] The gist of the invention in this box is to provide a coating liquid transfer roll, a coating liquid supply device that supplies coating liquid to the outer peripheral surface of the coating liquid transfer roll, and a coating liquid supply device that supplies coating liquid to the outer peripheral surface of the coating liquid transfer roll. In a kiss-coating type coating device having a sheet conveying path close to a surface, a coating liquid guide surface facing the outer circumferential surface of the coating liquid transfer roll has a coating liquid guiding surface between the coating liquid guide surface and the outer circumferential surface of the coating liquid transfer roll. The coating liquid guide surface extends from the coating liquid supply device to a terminal position close to the sheet conveyance path while forming a passage, and a surplus coating liquid discharge guide surface extends from the terminal position of the coating liquid guide surface. .

The gist of the second invention is to provide a coating liquid transfer roll, a coating liquid supply device that supplies coating liquid to the outer peripheral surface of the coating liquid transfer roll, and a measuring device that measures the coating liquid transferred by the coating liquid transfer roll. In the coating device, a coating liquid guide surface facing the outer circumferential surface of the coating liquid transfer roll forms a coating liquid guide passage between the coating liquid guide surface and the outer circumferential surface of the coating liquid transfer roll, and allows the coating liquid to be metered from the coating liquid supply device. The coating liquid guide surface extends to a terminal position close to the container, and a surplus coating liquid discharge guide surface extends from the terminal position of the coating liquid guide surface.

[Function] In the invention in this box, the coating liquid supplied from the coating liquid supply device rises in the coating liquid guide passage as the coating liquid transfer roll rotates and reaches the end of the coating liquid guide passage. It is discharged from the opening in a bubbling manner and is supplied to a location where the coating liquid transfer roll surface and the sheet feeding path are close to each other. The excess coating liquid is discharged without coming into contact with the liquid while being guided by the excess coating liquid discharge guide surface.

In the second invention, the coating liquid supplied from the coating liquid supply device rises in the coating liquid guide passage as the coating liquid transfer roller rotates and boils from the terminal opening of the coating liquid guide passage. The coating liquid is discharged to a point where the coating liquid transfer roll surface and the measuring device are close to or in contact with each other, and the surplus coating liquid that is not applied comes into contact with the coating liquid rising in the coating liquid guide passage. The excess coating liquid is discharged without being guided by the excess coating liquid discharge guide surface.

[Description of Examples] Hereinafter, a coating device according to the present invention will be described based on an example shown in the drawings.

In the following description, "front" means the right side in FIGS. 1, 4, 6, and 9, and "rear" means the left side in these figures. "Left" means Figure 2, Figure 3,
The left side in FIGS. 5, 7, and 8 is meant, and "right" refers to the right side in these figures.

(First Embodiment of the First Invention) FIGS. 1 to 3 show a kiss coat type coating device 11 showing a first embodiment of the present invention. The kiss coat type coating device 11 includes a coating liquid transfer roll 1 driven at an appropriate rotation speed.
3, a vertically swingable guide roll 27, 27 arranged to form a sheet conveying path A approaching the outer circumferential surface 13a of the coating liquid transfer roll 13, A coating liquid supply device 14 that supplies the liquid, a coating liquid guide 15 facing the outer peripheral surface 13a of the coating liquid transfer roll 13, and a surplus coating liquid discharge extending from the front end 15a of the coating liquid guide 15. It consists of a guide tool 16. The coating liquid supply device 14 includes a coating liquid discharge slit orifice 17 facing the rear outer peripheral surface 13a of the coating liquid transfer roll 13 extending in the left-right direction, and a manifold 18 formed at the starting end side of the slit orifice 17. It is configured to discharge the coating liquid N supplied into the manifold 18 from the discharge port 17a of the slit orifice 17 onto the outer peripheral surface 13a of the coating liquid transfer roll 13. On the front outer side of the coating liquid transfer roll 13,
A surplus coating liquid discharge guide 1G, which is long in the left and right direction, is arranged parallel to the coating liquid transfer roll 13. Surplus coating liquid discharge guide 1
6 has a pointed end 16a extending parallel to the roll outer circumferential surface 13a protrude in a coating liquid contact start region C where the outer circumferential surface 13a of the coating liquid transfer roll 13 and the sheet conveying path A are close to each other, and The tip 16a is attached to the main body frame 19 so that it can be adjusted forward and backward with respect to the coating liquid contact initiation region C. Surplus coating liquid discharge guide 1 is provided near both left and right ends of the outer circumferential surface 13a of the coating liquid transfer roll 13 from the coating liquid supply device 14.
End sealing devices 20, 20 (see FIGS. 2 and 3) for preventing coating fluid leakage are disposed across the point 16a of the tip 6. The front and rear ends of each end sealing tool 20 are connected to a coating liquid supply device 14
and a surplus coating liquid discharge guide 16 so as to be adjustable in left and right positions. On the outside of the outer circumferential surface of the coating liquid transfer roll 13, a coating liquid guide surface forming body 21 with both ends brought into close contact with the left and right end sealing tools 20.20 is wound, and the coating liquid guide surface forming body 21 is wound on the outer circumferential surface of the roll outer circumferential surface 13a. A coating liquid guide passage 22 is formed between the body 21 and the guide surface 21a. The coating liquid guide passage 22 can be adjusted to a suitable thickness T (for example, T=1 to 5II1 m) by adjusting the thickness of the end sealing tool 20.20. Further, if necessary, the thickness of the end sealing device 20.20 of the coating liquid guide passage N22 is gradually or stepwise thinned as it approaches the discharge opening 22a of the coating liquid guide passage 22. In some cases, shearing force can be applied to the coating liquid N passing through 22. The coating liquid guide surface forming body 21 is constructed by unwinding a flexible sheet 21c made of a synthetic resin film or the like wound into a roll 21b, and discharging it from the coating liquid supply device 14 to the excess coating liquid discharge guide 16. point 16 of
a and the guide roll 23 while in contact with the guide surface 16b,
23. 23 to guide the winding tool 24 in a high tension state and stop the flexible sheet 21c, unwind the flexible sheet 21c as necessary, and roll the roll outer peripheral surface 13a with a new flexible sheet 21c.
By covering the top, a coating liquid guide passage 22 is formed. Although not shown in the drawings, other examples of the coating liquid guide surface forming body 21 may be appropriately selected, such as a curved stainless steel plate or a block-shaped material cut away to form the coating liquid guide surface 21a. . In FIG. 1, 25 is a surplus coating liquid receiver, and 26 is a cleaning doctor.

Next, the behavior of the coating liquid N in the kiss coat type coating device 11 of this embodiment will be explained. Manifold 1 of coating liquid supply device 14
The coating liquid N pumped through the slit orifice 17 is uniformly supplied toward the outer circumferential surface 13a of the coating liquid transfer roller 13 from the entire width of the slit orifice 17, passes through the coating liquid guide passage 22, and is supplied across the entire width of the discharge opening 22a. The coating liquid N1 is uniformly discharged from the area, guided by the rotating coating liquid transfer roll 13, and transferred to the coating liquid contact start area C, where a predetermined amount of the coating liquid N1 is applied to the sheet S.

The surplus coating liquid N2 that has not been applied to the sheet S is guided to the surplus coating liquid discharge guide surface 16b without coming into contact with the coating liquid N rising in the coating liquid guide passage, and the surplus coating liquid is discharged to the tool 25. be done.

(Second Embodiment of the First Invention) FIGS. 4 and 5 show a kiss-coat type coating device 31 showing a second embodiment of the invention by Mizuo. In the kiss coating type coating device 31, a coating liquid transfer roll 13 driven at an appropriate rotational speed and a vertically swingable coating liquid transfer roll 13 arranged to form a sheet conveying path A approaching the outer circumferential surface 13a of the coating liquid transfer roll 13 are provided. The point provided with the guide rolls 27° and 27 is the first point.
This embodiment is the same as the embodiment, except for the coating liquid supply device 34 and the coating liquid guide 35.

The coating liquid supply device 34 that supplies the coating liquid to the outer circumferential surface 13a of the coating liquid transfer roll 13 is formed of a coating liquid supply pan that is movable up and down and immerses the lower half of the coating liquid transfer roll 13. The coating liquid guide device 35 includes a coating liquid guide surface forming body 41 made of a plate-shaped material or the like.
A coating liquid guide passage 42 is formed between the guide surface 41a and the roll outer peripheral surface 13a. The coating liquid guide surface forming body 41 has a tip 41b protruding from a coating liquid contact start region C where the outer peripheral surface 13a of the coating liquid transfer roll 13 and the sheet conveying path A are close to each other, and extends forward and backward toward the coating liquid transfer roll 13. It is attached to the coating liquid supply device 34 or the coating device main body frame (not shown) so that it can be adjusted forward and backward in the direction. A surplus coating liquid discharge guide 36 extends from the tip 41b of the coating liquid guide surface forming body 41. End sealing devices 40, 40 (see FIG. 5), which also function as edge doctor, are arranged near both left and right ends between the coating liquid guide surface forming body 41 and the roll outer circumferential surface 13a. Each end sealing device 40 is attached to the coating liquid guide device 35 so as to be adjustable in its left and right positions, so that the horizontal width dimension of the coating liquid guide passage 42 can be varied. The coating liquid guide passage 42 has an end sealing device 40.40.
By adjusting the thickness of , the thickness T (for example, T=
(approximately 1 to 5 mn+). Further, the coating liquid guide passage 42 is provided with an end sealing device 40.4 as necessary.
The thickness of the coating liquid N is gradually or stepwise thinned toward the discharge opening 42a of the coating liquid guide passage 42, so that shearing force can be applied to the coating liquid N passing through the coating liquid guide passage 42. In FIG. 4, 45 is a surplus liquid receiver, and 46 is a cleaning doctor.

Next, the behavior of the coating liquid N in the kiss coat type coating device 31 of this embodiment will be explained. The coating liquid N adhering to the outer circumferential surface 13a of the coating liquid transfer roller 13 rotating through the coating liquid supply device 34 and lifted up is supplied into the coating liquid guide passage 42 and passes through the coating liquid guide passage 42. The liquid is discharged uniformly from the entire width region of the discharge opening 42a, guided by the rotating coating liquid transfer roll 13, and transferred to the coating liquid contact start area C.
A predetermined amount of coating liquid Nl is applied to the sheet S. The surplus coating liquid N2 that has not been applied to the sheet S is transferred to the surplus coating liquid discharge guide 3 without coming into contact with the coating liquid N that is rising in the coating liquid guide passage.
The surplus mold liquid receiver is discharged to the tool 45 while being guided by the guide surface 36a of No. 6.

(First embodiment of the second invention) FIGS. 6 and 7 show a reverse roll coating type coating device 51 showing a first embodiment of the second invention. The reverse roll coating type coating device 51 includes a coating liquid transfer roll 53 that is driven at an appropriate rotational speed, a coating liquid supply device 54 that supplies the coating liquid P to the outer peripheral surface 53a of the coating liquid transfer roll 53, and A coating liquid guide surface 55 facing the outer circumferential surface 53a of the roll 53, a surplus coating liquid discharge guide 56 extending from the front end 55a position of the coating liquid guide surface 55, and a coating liquid transfer roll 5.
Metal ring roll 63 for measuring the coating liquid P transferred by 3
It consists of The coating liquid supply device 54 includes four blocks 71,
72, 73, 74, each block 71, 72,
73 and 74 are joined to left and right swing arms 75 and 75. Each block 71, 72° 73, 74 has a surface facing the outer peripheral surface 53a of the coating liquid transfer roll 53 as a coating liquid guide surface 5.
5, and a coating liquid guide passage 62 is formed between the roll outer peripheral surface 53a and the metering area where the coating liquid supply roll 53 and the metering roll 63 approach. Between the block 71 and the block 72, a slit orifice 57 for discharging the coating liquid facing the outer circumferential surface 53a of the coating liquid transfer roll 53 extends in the left-right direction, and a manifold 58 is formed at the starting end side of the slit orifice 57. It's there. Between the block 12 and the block 73, a slit orifice 67 for discharging the coating liquid facing the outer peripheral surface 53a of the coating liquid transfer roll 53 extends in the left-right direction, and a manifold 68 is formed at the starting end side of the slit orifice 67. It's there. The coating liquid P supplied into the manifold 58.68 is discharged from the discharge port 57a of the slit orifice 57.67.

The coating liquid is discharged from 67a into the coating liquid guide passage 62. In addition,
The front coating liquid discharge slit orifice 67 is provided as necessary, taking into consideration various conditions such as the viscosity characteristics of the coating liquid P and the amount of coating per unit time.

A surplus coating liquid discharge guide 56 is attached to a block 74 that is attached to the block 73 constituting the coating liquid supply device 54 so as to be able to move up and down. Surplus coating liquid discharge guide 56
is formed in a straight line in the left-right direction so that the tip 56a protruding into the measuring area is parallel to the axis E of the coating liquid transfer roll 53, and the coating liquid transfer roll 53 and metering roll 63 in a direction along the common tangential direction (the direction of the white arrow H). The position of the discharge opening 62a of the coating liquid guide passage 62 can be adjusted quickly and accurately by simply adjusting the mounting positions of the excess coating liquid discharge guide 56 and the block 74. At both left and right ends of the coating liquid guide passage 62, as shown in FIG.
is located. Each end sealing tool 60 is connected to the swing arm 75 so as to be adjustable in left and right positions. When it is necessary to adjust the thickness of the coating liquid guide passage 62 to an appropriate thickness T (for example, about T=1 to 5n+m), it is also necessary to adjust the thickness of the end sealing device 60, 60. As shown in FIG. 8, it is convenient to use an end sealing tool 80 whose thickness can be freely adjusted. That is, the end sealing tool 8
0 is a curved base 80a made of stainless steel or the like and extending along the outer peripheral surface 53a of the coating liquid transfer roll 53;
A sliding sealing material 80b made of Teflon or the like is attached to the inner peripheral surface of the base 80a, a groove 80c is formed on the outer peripheral surface of the base 80a, and an elastic material is fitted into the groove 80c. It consists of a tube 80d, and an elastic tube 80 as necessary.
Inject compressed air into d. Note that the coating liquid guide passage 6
2, the thickness T is the discharge opening 62 as shown in FIG.
If the thickness is gradually or stepwise thinned as the coating liquid P passes through the coating liquid guide passage 62, a shearing force can be applied to the coating liquid P passing through the coating liquid guide passage 62 to give it thixotropic properties, thereby improving the coating characteristics. In Fig. 6, 59 is a tool for removing excess coating liquid, and 55 and 56 are cleaning doctors.

Next, the behavior of the coating liquid P in the reverse roll coating type coating device 51 of this embodiment will be explained. The coating liquid P force-fed to the manifold 58 . The rotating coating liquid transfer roll 5 is discharged uniformly from the entire width area of the discharge opening 62a.
3 and transferred to a measuring area, metered by a metering roll 63 to a predetermined amount of coating liquid Pl, and applied to the sheet S held by a backup roll 61. The excess coating liquid P2 generated in the measuring area is transferred to the coating liquid guide passage 6.
The excess coating liquid bone is discharged to the tool 54 while being guided by the excess coating liquid discharge guide surface 56b without coming into contact with the coating liquid P rising inside the 2.

(Second Embodiment of the Second Invention) FIG. 9 shows a gravure coat type coating device 81 showing a second embodiment of the second invention. The gravure coating type application device 81 includes a coating liquid transfer roll 83 consisting of a gravure roll driven at an appropriate rotational speed, a coating liquid supply device 84 that supplies coating liquid P to an outer peripheral surface 83a of the coating liquid transfer roll 83, Coating liquid guide tool 8 facing outer peripheral surface 83a of liquid transfer roll 83
5, a surplus coating liquid discharge guide 86 extending from the front end 85a position of the coating liquid guide 85, and a doctor 93 for measuring the coating liquid P transferred by the coating liquid transfer roll 83. The coating liquid supply device 84 is formed of a coating liquid supply pan that is movable up and down and immerses the lower half of the coating liquid transfer roll 83 . The coating liquid guide 85 is formed of a coating liquid guide surface forming body 91 made of a plate-shaped material or the like, and forms a coating liquid guide passage 92 between the guide surface 91a and the roll outer peripheral surface 83a. The coating liquid guide surface forming body 91 has a pointed end 91a extending to the measuring area where the doctor 93 contacts the outer circumferential surface 83a of the coating liquid transfer roll 83, and is configured so that the coating liquid guide surface forming body 91 can be adjusted to advance or retreat toward the coating liquid transfer roll 83. It is attached to the liquid supply device 84 or the coating device main body frame (not shown). Point 9 of coating liquid guide surface forming body 91
1 a is formed in a straight line so as to be parallel to the axis F of the coating liquid transfer roll 83 . A surplus coating liquid discharge guide 86 extends from the tip 91 a of the coating liquid guide surface forming body 91 . The coating liquid guide passage 92 has a thickness T (for example, T=
1 to 5 nv). Furthermore, the coating liquid guide passage 92
It is also possible to apply a shearing force to the coating liquid P by gradually or stepwise decreasing the thickness T toward the discharge opening 92a.

In the figure, reference numeral 94 indicates the excess coating material.

Next, the behavior of the coating liquid P in the gravure coating type coating device 81 of this embodiment will be explained. The coating liquid N adhering to the outer circumferential surface 83a of the coating liquid transfer roller 83 that rotates through the coating liquid supply device 84 and lifted up is supplied into the coating liquid guide passage 92 and passes through the coating liquid guide passage 92. The coating liquid P1 is uniformly discharged from the entire width area of the discharge opening 92a, guided by a rotating coating liquid transfer roll 83, transferred to a measuring area, and metered to a predetermined amount of coating liquid P1 by a doctor 93, and backed up. It is applied to the sheet S held on the roll 61. The excess coating liquid P2 generated in the measuring area is transferred to the coating liquid guide passage 9.
The surplus coating liquid bones are discharged to the tool 94 while being guided by the guide surface 86a of the excess coating liquid discharge guide 86 without coming into contact with the coating liquid P rising inside the excess coating liquid P.

(Other embodiments of the second invention) In the second invention, although not shown, the coating liquid supply device 54, the coating liquid guide 55, and the excess coating in the reverse roll coating type coating device 51 shown in FIG. Of course, it is also possible to replace the liquid discharge guide 56 with a coating liquid supply device 84, a coating liquid guide 85, and a surplus coating liquid discharge device 86 shown in FIG.

In the second invention, although not shown, the coating liquid supply device 84, the coating liquid guide 85, and the surplus coating liquid discharge guide 86 in the gravure coating type coating device 81 shown in FIG.
Of course, it is also possible to change the coating liquid supply device 54, the coating liquid guide device 55, and the excess coating liquid discharge device 56 shown in FIG.

Furthermore, in the second invention, although not shown, the sixth invention
By changing the metering roll 63 in the reverse roll coating type coating device 51 shown in the figure to a doctor knife,
It is also possible to apply the present invention to a bar reverse coating type coating device in which a metering gap is formed between the doctor knife and the coating liquid transfer roller 53.

[Effects of the present invention] As detailed above, the coating device according to the present invention has the following excellent effects.

(Effects of the first invention) ■ The coating liquid discharged from the terminal opening of the coating liquid guide passage is supplied to a location where the coating liquid transfer roll surface and the sheet conveyance passage are close to each other, and is not coated. The excess coating liquid that was not present in the coating liquid guide path is guided to the excess coating liquid discharge guide surface and discharged without coming into contact with the coating liquid rising in the coating liquid guide passage, so the layer thickness distribution of the coating liquid in the coating liquid contact start area is reduced. becomes uniform. As a result, the coating thickness distribution of the coating liquid applied to the sheet becomes uniform, allowing highly accurate coating.

■ Surplus coating liquid that was not applied is guided to the excess coating liquid discharge guide surface and discharged without coming into contact with the coating liquid rising in the coating liquid guide passage, so air cannot be drawn into the coating liquid. do not have. As a result, defect-free coating can be achieved.

■ Since a coating liquid guide passage is formed by a coating liquid guide on the outer periphery of the coating liquid transfer roll, the coating liquid in the coating liquid guide passage is
The coating liquid is not scattered by the coating liquid transfer roll rotating at high speed, and is ejected from the terminal opening of the coating liquid guide passage.

As a result, high-speed coating, which was previously impossible, is now possible.
Productivity can be improved.

■ Since the coating liquid passing through the coating liquid guide passage does not come into contact with the outside air, there is no evaporation of the solvent in the coating liquid or deterioration of the coating liquid composition. As a result, predetermined coating can be performed.

(Effect of the second invention) ■ The coating liquid discharged from the terminal opening of the coating liquid guide passage is supplied to the measuring area where the coating liquid transfer roll surface and the measuring tool are close to each other, and is not measured. The excess coating liquid is guided to the excess coating liquid discharge guide surface and discharged without coming into contact with the coating liquid rising in the coating liquid guide passage, so the layer thickness distribution of the coating liquid within the metering area becomes uniform. . As a result, the coating thickness distribution of the coating liquid applied to the sheet becomes uniform, allowing highly accurate coating.

■ It has the same effect as described in ■■■ above.

[Brief explanation of the drawing]

FIG. 1 is a right cross section showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II--II in FIG. 1, and FIG.
The figure is an omitted intermediate sectional view taken along the line ■-■ in Figure 1.
The figure is a right sectional view showing the second embodiment of the present invention;
The figure is an intermediate sectional view taken along line v-v in Figure 4, and Figure 6.
The figure is a right sectional view showing the first embodiment of the second invention.
The figure is an omitted intermediate sectional view taken along the line ■-■ in Figure 6.
The figure is a sectional view showing a different embodiment of the end sealing device, No. 9.
The figure is a right sectional view showing the second embodiment of the second invention;
Fig. 0 is a partially cutaway perspective view showing a conventional kiss coat type coating device, Fig. 11 is a partially cutaway perspective view showing a conventional reverse roll coat type coating device, and Fig. 12 is the xi of Fig. 10.
It is an enlarged view taken along the -xi line. 13 (33, 53, 83)...Coating liquid transfer roll 14
(34, 54, 84>... coating liquid supply device 15 (35
,55,85)...Coating liquid guide tool 22 (42,62,
92)...Coating liquid guide passage 25 (36, 56, 86>
... Surplus coating liquid discharge guide device patent applicant Inoue Metal Industry Co., Ltd. Agent Patent attorney 1) Toshihiko Figure 2 Figure 1

Claims (1)

[Claims] 1. A coating liquid transfer roll, a coating liquid supply device that supplies the coating liquid to the outer circumferential surface of the coating liquid transfer roll, and a sheet conveyance path that approaches the outer circumferential surface of the coating liquid transfer roll. In the kiss coat type coating device, the coating liquid guide surface facing the outer circumferential surface of the coating liquid transfer roll forms a coating liquid guide passage between the coating liquid guide surface and the outer circumferential surface of the coating liquid transfer roll, and allows the coating liquid to flow from the coating liquid supplyer. A coating device, characterized in that the coating liquid guide surface extends to a terminal position close to the sheet conveying path, and further includes a surplus coating liquid discharge guide surface extending from the terminal position of the coating liquid guide surface. 2. The coating apparatus according to claim 1, wherein the coating liquid supply device is a coating liquid supply pan in which a part of the coating liquid transfer roll is immersed. 3. The coating apparatus according to claim 1, wherein the coating liquid supply device is provided with a slit orifice for discharging the coating liquid facing the outer peripheral surface of the coating liquid transfer roll. 4. A coating device comprising a coating liquid transfer roll, a coating liquid supply device that supplies coating liquid to the outer peripheral surface of the coating liquid transfer roll, and a measuring device that measures the coating liquid transferred by the coating liquid transfer roll, A coating liquid guide surface facing the outer circumferential surface of the coating liquid transfer roll forms a coating liquid guide passage between the coating liquid guide surface and the outer circumferential surface of the coating liquid transfer roll from the coating liquid supply device to a terminal position close to the measuring device. A coating device characterized in that the coating device is extended, and a surplus coating liquid discharge guide surface extends from a terminal position of the coating liquid guide surface. 5. The coating device according to claim 4, wherein the measuring device is a metering roll. 6. The coating device according to claim 4, wherein the measuring device is a blade type doctor. 7. The coating apparatus according to claim 4, 5 or 6, wherein the coating liquid supply device is a coating liquid supply pan in which a part of the coating liquid transfer roll is immersed. 8. The coating device according to claim 4, 5 or 6, wherein the coating liquid supply device is provided with a slit orifice for discharging the coating liquid facing the outer peripheral surface of the coating liquid transfer roll.