JPH11276973A - Sending of coating solution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a high-quality coated sample and to rapidly and accurately judge the technique in the development of a new product by utilizing a check valve, or the like batchwise in the suction or discharge of a plunger- provided cylinder, sending a coating soln. so that the bubbling and nonuniform coating of a horizontal stage are not caused even if a flusing water is not used and conducting rapid coating in a test plant with a minimum amt. of the soln. SOLUTION: A coating soln. is introduced into a plunger-provided cylinder 22 from a coating soln. storage tank 10 through a check valve 11 on the coating soln. inlet side and then supplied to a coater 40 from the cylinder 22 through a check valve 31 on the outlet side, and coating is conducted without using a flushing water. Further, a cleaning water inlet passage having a check valve 13 on the cleaning water inlet side is provided between the check valve 13 and the cylinder 22, the opening pressure of the check valve on the cleaning water side is set higher than that of the check valve 11, and cleaning is performed by introducing the cleaning water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for feeding a coating liquid, and more particularly to a method for feeding a coating liquid in a coating method without flushing water.

[0002]

2. Description of the Related Art Coating solutions such as photographic emulsions are prepared by dissolving respective constituent liquids in respective dissolving tanks, mixing them in mixing tanks, stirring and mixing, and further performing defoaming treatment. . The coating liquid adjusted in this way is supplied to the coater to perform coating, but before being coated on the support by the coater, the coating liquid is drained into a liquid supply path, and is fed as flushing water. Water is sent, and then the adjusted coating liquid is sent to the same flow path and then sent to a different position from the support, and the state of flushing water as a water leader and subsequent coating The state of the flow of the liquid was observed, and it was confirmed that there was no re-generation of bubbles or the like. Then, the coater was advanced on the support, and the actual application was started.

[0003]

However, when such a coating process is employed, the boundary between the flushing water as a water leader and the coating solution is mixed, and a considerable amount of valuable coating solution is discharged, and the waste liquid is discharged. turn into. Such a waste liquid recovery process also requires a great deal of time and labor, and the above-mentioned liquid feeding operation becomes complicated and production efficiency deteriorates. Especially,
When a large amount of sample preparation in research and development is frequently used, the disposal rate of the coating solution becomes very large.

The present invention eliminates the waste of the coating liquid as described above, enables good coating without generating bubbles without flushing water, and can quickly respond to the preparation of a small amount of coating sample, thereby achieving high production efficiency. An object of the present invention is to provide a method for feeding a liquid.

[0005]

This object is achieved by any one of the following technical means (1) to (12).

(1) The coating liquid flows from the coating liquid storage tank into the cylinder with the plunger through the coating liquid inflow-side check valve, and the coating liquid flows from the cylinder with the plunger to the coater through the coating liquid outflow-side check valve. A method for feeding a coating liquid, wherein the coating can be performed without using flushing water.

(2) The coating liquid flows from the coating liquid storage tank to the cylinder with the plunger through the coating liquid inflow side pinch valve, and is applied from the cylinder with the plunger to the coater through the coating liquid outflow side check valve or pinch valve. What is claimed is: 1. A method for feeding a liquid, wherein the coating is performed without using flushing water.

(3) The coating liquid flows from the coating liquid storage tank into the cylinder with the plunger through the coating liquid inflow-side check valve, and the coating liquid flows from the cylinder with the plunger to the coater through the coating liquid outflow-side check valve. A liquid supply method for supplying, wherein coating can be performed without using flushing water, and a cleaning water inflow side check valve is provided between the coating liquid inflow side check valve and the cylinder with a plunger. The cleaning water inflow path is provided, and the valve opening pressure of the check valve on the cleaning water side is set to be larger than the valve opening pressure of the check valve on the coating liquid inflow side, thereby enabling cleaning by the inflow of cleaning water. Characteristic method of feeding coating liquid.

(4) The coating liquid flows from the coating liquid storage tank to the cylinder with the plunger through the coating liquid inflow side pinch valve, and is applied from the cylinder with the plunger to the coater through the coating liquid outflow side check valve or pinch valve. A liquid feeding method for supplying a liquid, in which coating can be performed without using flushing water, and a T.sub.T between the coating liquid inflow side pinch valve and the cylinder with a plunger.
A method for feeding a coating liquid, characterized in that a cleaning water inflow path having a cleaning water inflow side pinch valve is provided through a pipe, and cleaning by inflow of the cleaning water is also enabled.

(5) The coating liquid flows from the coating liquid storage tank to the cylinder with the plunger through the three-way valve on the coating liquid inflow side, and the coating liquid is applied from the cylinder with the plunger to the coater through the check valve or the pinch valve on the coating liquid outflow side. A liquid supply method for supplying a liquid, in which coating can be performed without using flushing water, and an inflow path of washing water is connected to another one of the three-way valves on the coating liquid inflow side, and the three-way valve is switched. A method for feeding a coating liquid, wherein cleaning by inflow of cleaning water is enabled by an operation.

(6) The connection of the coating liquid from the coating liquid storage tank to the coater is performed by connecting a three-way valve.
One of the other ports of the three-way valve is connected for supplying flushing water, and the flushing water and the coating liquid are switched by the switching operation of the three-way valve and supplied to the coater. , Wherein the inner diameter of each liquid sending pipe of the pipe system is 1 to 10 mm.

(7) The coating liquid flows into the cylinder with the plunger from the coating liquid storage tank through the check valve or the pinch valve on the coating liquid inflow side, and the check valve or the pinch on the coating liquid outflow side from the cylinder with the plunger to the coater. A method for feeding a coating liquid through a valve, wherein the coating can be performed without using flushing water, and the inner diameter of each liquid feeding pipe is set to 1 to 10 mm. .

(8) A method for feeding a coating liquid according to the mode (3), (4) or (5), wherein the inner diameter of each liquid feeding pipe is 1 to 10 mm.

(9) The valve opening pressure of the check valve on the washing water inflow side is 1.5 to 1.8 kg / cm ² , and the valve opening pressure of the check valve on the coating solution inflow side is 0.5 to 0.8 kg / cm ² . The method for feeding a coating liquid according to the item (3) or (8), wherein the pressure is 7 kg / cm ² .

(10) The up and down movement of the plunger is performed via a ball screw. (1), (2), (3), (4), (5), (7),
(8) The method for feeding a coating liquid according to any one of the above (9).

(11) In the method for feeding a coating solution, compressed air is blown into a portion where the coating solution passes to dry the inside of the solution sending pipe.
The method for feeding a coating liquid according to any one of the above items 0).

(12) The cleaning water inflow path on the inflow side of the cleaning water is characterized in that compressed air is switched in place of the cleaning water to blow and dry the inside of the liquid sending pipe (3), ( 4), (5), (8), (9), (10), the method for sending a coating liquid according to any one of the items.

[0018]

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited thereto.
In the following description, although there are definite expressions for terms and the like, they show preferred examples of the present invention, and do not limit the meaning of the terms of the present invention and the technical scope.

An example of the embodiment of the present invention will be described with reference to a liquid feeding system diagram of FIG.

A coating solution such as a photographic emulsion prepared by dissolving, mixing and defoaming is temporarily stored in a coating solution storage tank 10 and processed in a batch. The coating liquid in the coating liquid storage tank 10 passes through the liquid feeding pipe 15, the coating liquid inflow-side check valve 11, and the liquid feeding pipe 16, and is moved into the cylinder by the ascending movement of the plunger 24 of the cylinder 22 with the plunger. The application liquid sucked in from the pipe 27 is sent to the first slit 42 of the coater 40 from the discharge hole 28 through the liquid supply pipe 29, the coating liquid outflow check valve 31, and the liquid supply pipe 32 by the downward movement of the plunger 24. It is going to be liquid. Of course, the check valves 11 and 31 may be replaced with pinch valves. However, handling is easier with a check valve.
Then, a fixed amount of the coating liquid flowing down on the slide surface 41 from the first slit 42 is applied from a coater lip 43 onto a support 52 wound around a back roller 51. Of course, according to the present invention, not only the first slit 42 but also a plurality of slits such as the second slit 44 and the third slit 46 can be subjected to the same liquid feeding method as described above, thereby enabling the multilayer coating of a plurality of layers. .

A cylinder 25 with a plunger is incorporated into a gantry 21 together with a driving mechanism thereof. An upper lid 23 is attached to the cylinder 22 and the cylinder 25 is hermetically sealed. A rod 25 having a male screw 25A driven by a ball screw 26 is cut. A plunger 24 concentrically connected to the cylinder is slidably fitted on the inner surface of the cylinder. Thus, the drive is transmitted by the ball screw 26 and the ball screw 2
Reference numeral 6 is driven by a motor (not shown) via a gear. Up and down movement of the plunger is achieved by switching between forward and reverse rotation of the motor. By using this ball screw, plunger up / down pulsation was eliminated, smooth operation was performed, and horizontal unevenness during coating was eliminated. In addition, no bubbles were generated again during the feeding of the coating solution whose defoaming was adjusted, and extremely good coating was realized. However, the drive transmission is not limited to the drive by the ball screw, but may be the drive by a precise spiral screw, or the drive by hydraulic or hydraulic pressure.

In order to carry out washing efficiently, the liquid feed pipe 16 between the coating liquid inflow side check valve 11 and the suction hole 27 is provided.
Is connected to a liquid feed pipe 18 for the inflow path of washing water having a washing water inflow side check valve 13 with a valve opening pressure of 1.5 to 1.8 kg / cm ² . And the coating liquid inflow side check valve 11
Is set to 0.5 to 0.7 kg / cm ² , so that the cleaning water supply from the cleaning water supply pipe 17 enables the cleaning of the liquid supply path from the cylinder 22 to the coater 40. ing. A sufficient effect can be obtained with a washing time of about 1 minute. Further, the inflow of the washing water during the feeding of the liquid from the coating liquid inflow side check valve 11 is also prevented. However, the value of the valve opening pressure is not limited to the above.

Here, each of the check valves 11 and 13 can be replaced by a pinch valve, or both can be replaced by a three-way valve. The results are all good.

However, in particular, both of them are check valves, and the handling operation is simple and more stable.

If water droplets remain in the liquid passage during washing, bubbles may be regenerated, so it is preferable to employ a drying means. Drying is completed by passing compressed air for about 5 minutes. When warm air is sent, drying is performed in a shorter time.

Next, a description will be given, with reference to the piping system diagram of FIG. 2, of a conventional liquid sending method in which continuous processing can be performed using flushing water by improving the conventional method.

Each coating solution such as a photographic emulsion prepared by dissolution, mixing and defoaming is applied to each coating solution storage tank 110A, 11
0B, 110C, and each three-way valve 111A,
111B, 111C, each liquid sending pump P1, P2, P3,
The liquid is supplied to each of the slits 42, 44, 46 of the coater 40 by the respective liquid feed pipes 132A, 132B, 132C.

The three-way valves 111A, 111B, 111C
The vacant connection port is flushing water pipe 133A,
133B and 133C are connected. In starting the coating, first, the three-way valves 111A, 111B, 111C are used.
Is switched, and each flushing water is supplied to the three-way valve 111.
Pumps P1, P2, P passing through A, 111B, 111C
3, each slit 42, 44, 46 of the coater 40
And the three-way valves 111A, 111B, 111C
Is switched to confirm that the respective coating liquids are supplied and the condition is good. Then, the coater 40 is moved to a predetermined coating position to start the actual coating. Surprisingly, at this time, the inner diameter of each of the liquid sending pipes 132A, 132B, 132C and each of the flushing water pipes 133A, 133B, 133C is one.
When the thickness is from 10 to 10 mm, and more preferably from 3 to 7 mm, good application is performed without re-generation of bubbles. However, it is confirmed that stable application is lost when the area is out of the range.

When the inner diameter of each pipe in the liquid feed pipe shown in the liquid feed system diagram of FIG. 1 is in the range of 1 to 10 mm, preferably 3 to 7 mm, better coating can be obtained than in other cases. It was also confirmed that it was obtained stably.

[0030]

According to the liquid feeding method of the present invention, the flushing water is supplied by using a check valve, a pinch valve, or a three-way valve (particularly, a check valve) for suction and discharge of a cylinder with a plunger in a batch system. Even without it, it became possible to send uniform liquid without bubbles. Further, the pulsation of the liquid feed was reduced by using a ball screw for driving the plunger, and stable application was obtained without application unevenness such as a horizontal failure.

Further, the washing of the liquid sending system and the removal of water droplets in the tube can be easily and reliably performed, the re-generation source of bubbles can be eliminated, and a liquid sending method capable of performing stable application has been established.

Since the batch method is used, a high-quality coated sample can be easily obtained by applying a very small amount of liquid in a test plant, and the technical judgment in new product development can be made quickly and accurately. And accelerated the efficiency and shortening of R & D.

[Brief description of the drawings]

FIG. 1 is a liquid sending system diagram showing an example of a liquid sending method of the present invention.

FIG. 2 is a liquid sending system diagram showing an example of a conventional liquid sending method.

[Explanation of symbols]

10, 110A, 110B, 110C Coating liquid storage tank 11 Coating liquid inflow check valve 13 Washing water inflow check valve 15, 16, 17, 18, 29, 32 Liquid feed pipe 20 Cylinder with plunger 21 Cradle 22 Cylinder Reference Signs List 24 plunger 26 ball screw 27 suction hole 28 discharge hole 31 coating liquid outflow check valve 40 coater 41 slide surface 42, 44, 46 slit 43 coater lip 51 back roller 52 support 111A, 111B, 111C three-way valve 132A, 132B, 132C, 133A, 133B,
133C Liquid supply piping

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shukei Ueno 1st Konica Corporation, Sakuracho, Hino-shi, Tokyo

Claims (12)

[Claims] 1. A coating liquid flows from a coating liquid storage tank to a cylinder with a plunger through a coating liquid inflow-side check valve, and supplies the coating liquid from the cylinder with a plunger to the coater through a coating liquid outflow-side check valve. A method of feeding a coating liquid, wherein the coating can be performed without using flushing water. 2. A coating liquid flows from a coating liquid storage tank to a cylinder with a plunger through a coating liquid inflow side pinch valve, and from the cylinder with a plunger to a coater through a coating liquid outflow side check valve or a pinch valve. A method for feeding a coating liquid, characterized in that the coating can be performed without using flushing water. 3. A coating liquid flows from a coating liquid storage tank to a cylinder with a plunger through a coating liquid inflow-side check valve, and supplies the coating liquid from the cylinder with a plunger to the coater through a coating liquid outflow-side check valve. Cleaning method, wherein the coating can be performed without using flushing water, and a cleaning water inflow side check valve is provided between the coating liquid inflow side check valve and the plunger-equipped cylinder. A water inflow path is provided, and the valve opening pressure of the check valve on the wash water side is set to be greater than the valve opening pressure of the check valve on the application liquid inflow side, thereby enabling cleaning by inflow of the wash water. A method for feeding a coating liquid. 4. A coating liquid flows from a coating liquid storage tank to a cylinder with a plunger through a coating liquid inflow side pinch valve, and from the cylinder with a plunger to a coater through a coating liquid outflow check valve or a pinch valve. And a method of supplying coating water without using flushing water, and washing water flowing through a T-shaped pipe between the coating liquid inflow side pinch valve and the cylinder with a plunger. A method for feeding a coating liquid, wherein a cleaning water inflow path having a side pinch valve is provided to enable cleaning by inflow of the cleaning water. 5. A coating liquid flows from a coating liquid storage tank to a cylinder with a plunger through a three-way valve on the coating liquid inflow side, and from the cylinder with the plunger to the coater through a check valve or a pinch valve on the coating liquid outflow side. A method of supplying the liquid, wherein the coating can be performed without using flushing water, and a cleaning water inflow path is connected to the other one of the three-way valves on the coating liquid inflow side, and a three-way valve switching operation is performed. Wherein the cleaning by inflow of the cleaning water is also enabled. 6. A coating liquid is supplied from the coating liquid storage tank to the coater by connecting a three-way valve to the coater, and one of the other connection ports of the three-way valve is connected for supplying flushing water. In the method for feeding both liquids, wherein the flushing water and the coating liquid are switched by a valve switching operation and supplied to the coater, the inner diameter of each liquid feeding pipe of the piping system is set to 1 to 10 mm. How to send the liquid. 7. A coating liquid is allowed to flow from a coating liquid storage tank to a cylinder with a plunger through a check valve or a pinch valve on the coating liquid inflow side, and the check valve or a pinch valve on the coating liquid outflow side from the cylinder with the plunger to the coater. A method for supplying a coating liquid through a liquid feeding method, wherein coating can be performed without using flushing water, and the inner diameter of each liquid feeding pipe is set to 1
A method for feeding a coating solution, characterized in that the thickness is set to 10 to 10 mm. 8. The method for feeding a coating liquid according to claim 3, wherein the inner diameter of each liquid feeding pipe is 1 to 10 mm. 9. The valve opening pressure of the wash water inflow side check valve is 1.
In 5~1.8kg / cm ^2, the coating solution according to claim 3 or 8 valve opening pressure of the coating liquid inflow side check valve is characterized in that it is a 0.5~0.7kg / cm ² Liquid sending method. 10. The apparatus according to claim 1, wherein the plunger is vertically moved via a ball screw.
The method for feeding a coating liquid according to any one of 2, 3, 4, 5, 7, 8, and 9. 11. The method for feeding a coating liquid according to claim 1, wherein compressed air is blown into a portion where the coating liquid passes to dry the liquid feeding pipe. The method for feeding the coating liquid. 12. The cleaning water inflow path on the cleaning water inflow side, wherein compressed air is switched instead of cleaning water to blow and dry the inside of the liquid sending pipe. The method for feeding a coating liquid according to any one of 5, 8, 9, and 10.