JP3224604B2 - Die coater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die coater, and more particularly, to an improved die coater capable of cleaning a die efficiently and easily.

[0002]

2. Description of the Related Art A die coater includes a die formed by forming a manifold with upper and lower molds disposed between left and right side plates and forming a slit at a tip end extending from the manifold. And it is used when applying the surface of the running sheet.

[0003]

When changing the paint in the conventional die coater, it is necessary to stop the supply of the paint and wash the die (the inside of the manifold and the slit) with a solvent. Operation usually requires a great deal of time due to the need to disassemble the die. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an improved die coater capable of efficiently and easily cleaning a die.

[0004]

That is, the gist of the present invention consists of a die (A), a paint supply device (B), and a die cleaning device (C), and the die (A) includes left and right side plates (11). ), (12).
3) and (14) to form a manifold (15),
At the tip extending from the manifold, a slit (1
6), and furthermore, each side plate has a pipe (17) connected to the manifold (15),
(18) is connected, and valves (19) and (2)
0) is arranged and the side plate (11) of the pipe (17)
And a valve (19), a branch pipe (21) is connected, a valve (22) is arranged in the branch pipe, and the paint supply device (B) is connected to the pipe (17) of the die (A). )
The die cleaning device (C) is detachably connected to a solvent tank (24) and a branch pipe (2) by a joint (23).
1) A die coater characterized in that a self-priming supply pump (25) is arranged in a circulation path comprising a manifold (15) and a pipe (18).

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a die coater of the present invention with the paint supply apparatus removed, FIGS. 2 to 4 are explanatory views showing an example of a paint supply apparatus used in the die coater of the present invention, and FIG. FIG. 3 is an explanatory view showing a state of paint priming (work for adding priming water) of FIG. 3, FIG. 3 is an explanatory view showing a state of filling of paint into a die side piping, etc., and FIG. It is explanatory drawing which showed the working state.

First, the die (A) will be described with reference to FIG. The die (A) is basically the same as the conventional die, and the manifold (15) is formed by upper and lower dies (13) and (14) arranged between the left and right side plates (11) and (12). ) Is formed, and a slit (16) is formed at a tip end extending from the manifold.

The side plates (11) and (12) include:
Each pipe (1) is connected to the manifold (15).
7) and (18) are connected, and valves (19) and
(20) is arranged. A branch pipe (21) is connected between the side plate (11) of the pipe (17) and the valve (19), and a valve (22) is connected to the branch pipe.
Has been arranged. As a preferred embodiment, an air vent pipe (26) is connected between the side plate (12) of the pipe (18) and the valve (20), and a valve (27) is arranged in the air vent pipe.

Next, the paint supply device (B) will be described with reference to FIG. The configuration of the paint supply device (B) is not particularly limited, but as illustrated in FIG. 2, the paint container (1),
A self-priming supply pump (2), a pipe (3) having one end located in the paint contained in the paint container (1) and the other end connected to a suction port of the self-priming supply pump (2); A circulation line, a branch line (5) comprising a line (4) having one end located in the paint contained in the paint container (1) and the other end connected to the discharge port of a self-priming supply pump (2). And a metering pump (7).

As the metering pump (7), a Zenith pump is usually used, and such a pump generally has low self-priming property but high quantitative property. As the self-priming supply pump (2), a diaphragm pump, a snake pump or a gear pump is usually used.
Generally, it has a high self-priming property but a low quantitative property.

The branch pipe (5) is located downstream of the self-priming supply pump (2) in the above-mentioned circulation path and at a position (a) below the liquid level of the paint contained in the paint container (1). )
It is provided in. The metering pump (7) has a suction port connected to the branch pipe (5), a discharge port connected to the die-side pipe (6), and a liquid level of the paint contained in the paint container (1). Is provided at the position. Then, the metering pump (7) starts driving after the paint is filled in the circulation path.

Further, the paint container (1) is provided with a stirrer (not shown) to prevent the aggregation of the paint components.
At each end of the pipes (3) and (4) in the paint container (1), a wire mesh (not shown) having an appropriate aperture is arranged to remove foreign matter and agglomerates in the paint. Further, a wire mesh (not shown) having an appropriate aperture is provided between the die-side pipe (6) and the die (A), usually, the die-side pipe (6) immediately before the die (A).
Are arranged, and the foreign matter, agglomerates and the like in the paint are more reliably removed.

A bypass branched from a position (b) downstream of the self-priming supply pump (2) in the circulation path and upstream of the branch pipe (5) and connected to the die-side pipe (6). A pipe (8) is provided, and a valve (9) is provided in the bypass pipe. The valve (9) is opened after the paint is filled in the circulation path, and is closed after the operation of the metering pump is started.

Further, a valve (10) is provided between the self-priming supply pump (2) and the position (a) or between the positions (a) and (b) in the circulation path.
If a bypass pipe (8) is provided, the valve (1
0) is provided between the position (a) and the position (b). The valve (10) is at least a metering pump (7)
Is closed after the start of the drive, but may be closed after the circulation path is filled with paint.

Each of the pipes of the above-mentioned paint supply device is made of a material having corrosion resistance to paint and necessary strength. In general, sanitary pipes and Teflon-lined pipes are recommended from the viewpoint of easy cleaning. .

In the above-described paint supply apparatus, various control mechanisms can be employed to achieve automation. For example,
A load cell scale (not shown) is part of a control system for the purpose of measuring the amount of paint remaining in the paint container (1), starting and stopping a supply signal, and monitoring and recording the amount of paint used. Can be incorporated into In addition, a high-precision inverter motor or the like is used to drive the metering pump (5), and the amount of paint supply is calculated according to the conditions such as coating speed and coating film.
The driving of the metering pump (5) can be automatically controlled.
Of course, depending on the required coating accuracy, a manual transmission can be used for drive control of the metering pump (5). In addition, the open / close switching of the self-priming supply pump (2) and the valves (9) and (10) can be automatically controlled by using a timer circuit or the like.

According to the above-mentioned paint supply device, when the paint is sucked from the upper portion of the paint container (1) by the metering pump (7) and supplied to the die (A), the self-priming supply pump (2).
, The prime work to the metering pump (7) can be efficiently performed, and the subsequent driving of the metering pump (5) can supply the paint to the die (A) with high accuracy. . In addition, the metering pump (7) such as a Zenith pump needs to structurally avoid idling, but by driving the metering pump (7) after the priming operation, the metering pump (7) is substantially idled. To be avoided.

Next, the die cleaning apparatus (C) will be described with reference to FIG. The die cleaning device (C) includes a solvent tank (24), a branch pipe (21), a manifold (15),
A self-priming supply pump (2
5) is arranged. Self-priming supply pump (25)
Various pumps similar to those used in the paint supply device (B) are used. In addition, a self-priming supply pump (2
5) may be arranged on the branch pipe (21) side as shown, or may be arranged on the pipe (18) side. And in any case, the valve (22) or the valve (2)
0) and a solvent tank (24). As each pipe of the above-mentioned cleaning device, a pipe made of a flexible material, for example, Teflon is usually used.

The die coater of the present invention comprises the above-described die (A), a paint supply device (B) and a die cleaning device (C), and the paint supply device (B) is provided with a pipe (1) for the die (A).
7) is detachably connected by a joint (23). Specifically, the pipe (17) of the die (A) and the die-side pipe (6) of the paint supply device (B) are connected by a joint (23). The paint supplied from the paint supply device (B) to the die (A) is distributed in the manifold (15), and is extruded from the slit (16) into a thin film.

The die coater of the present invention is used, for example, as follows. <Supply of paint> Connection work between die (A) and paint supply device (B) Pipe (17) of die (A) and die-side pipe (6) of paint supply device (B) are connected by joint (23). Connecting. Prime work of paint to metering pump (7) (see FIG. 2) By driving self-priming supply pump (2), paint container (1), pipe (3), self-priming supply pump (2) and pipe ( Fill the circuit of 4) with paint. As a result, the branch pipe (5) is also filled with the paint, and the prime work of the paint to the metering pump (7) is efficiently performed. During this time, the metering pump (7) is stopped. The valve (9) provided with the bypass pipe (8) is closed, and the valve (10) is open.

Filling of Die-Side Pipes with Paint (See FIGS. 1 and 3) By opening the valves (9), (19) and (27), the paint circulating in the circulation path A part is efficiently filled into the inside of the die (A) through the bypass pipe (8) and the die-side pipe (6). At this time, the valve (2
0) and (22) are closed. Work for quantitative supply of paint to die (A) (FIGS. 1 and 4)
The quantitative supply of the paint to the manifold (15) is performed by starting the operation of the metering pump (7) by starting each flow of the paint container (1), the pipe (4), the branch pipe (5), and the die-side pipe (6). It is performed with high accuracy through the road. The valves (9) and (10) are closed after the operation of the metering pump (7). At this time, the valves (9) and (2)
7) is closed.

<Cleaning work of die (A)> Separation work of die (A) and paint supply device (B) The operation of the metering pump (7) is stopped, the joint (23) is released, and the die (A) is released. The pipe (17) is separated from the die-side pipe (6) of the paint supply device (B). The valves (19) and (27) are closed, and the valve (2)
0) and (22) are opened, and the self-priming supply pump (25) of the die cleaning device (C) is driven. Solvent tank (2
4) The solvent in the branch pipe (21) and the manifold (1)
5) and is circulated to the solvent tank (24) through the pipe (18). At this time, if necessary, the pipe (18) can be disposed outside the system of the solvent tank (24) to separately treat the cleaning waste liquid.

Further, the washing waste liquid flowing out of the slit (16) can be collected by, for example, a tray (not shown) arranged in front of the slit (16). Further, by opening the valves (19) and (20), the paint remaining in the pipe (17) and the air vent pipe (26) can be washed and removed. In addition, as the solvent, a known solvent such as a thinner can be used. The above cleaning operation can be performed during the operation of connecting the separately prepared paint supply device to the die (A). Moreover, the self-priming supply pump (25) having a large self-priming property can be efficiently implemented.

<Cleaning of Paint Supply Unit (B)> The paint container (1) was changed to a solvent container, and FIGS.
The operation is performed according to the operation shown in FIG. Such a washing operation can also be efficiently performed by the self-priming supply pump (2) having a large self-priming property.

[0024]

According to the die coater of the present invention described above, the following specific effects can be achieved. The die (A) can be efficiently and easily cleaned.
That is, the paint supply device (B) is detachably connected to the pipe (17) of the die (A) by the joint (23). Therefore, when changing the paint, the die (A) can be washed during the operation of connecting the separately prepared paint supply device to the die (A) without disassembling the die (A). . Then, the die (A) can be efficiently cleaned by the self-priming supply pump (25) of the die cleaning device (C). Moreover, the die cleaning device (C)
Is a line separate from the paint supply line, so that a normal state can always be maintained.

By using the paint supply device of the preferred embodiment, prime work and the like can be performed efficiently, and the paint can be supplied to the die (A) with sufficient quantitativeness. In other words, a die coater for precision coating is required to have a higher coating amount, but cannot be coped with a conventional coating material supply apparatus using a supply pump with low quantitativeness such as a gear pump. Conversely, the metering pump requires a long time for priming and is not efficient. In addition, it hinders a pipe cleaning operation or the like performed when the paint is changed in the same paint supply device. According to the paint supply device of a preferred embodiment, the above problems can be solved at once.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a die coater according to the present invention with a paint supply device removed. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows an example of the paint supply apparatus of this invention, and is the explanatory view which showed the prime work state of the paint to a metering pump.

FIG. 2 is an explanatory diagram illustrating an example of a paint supply device used in the die coater of the present invention, and is an explanatory diagram illustrating a state in which paint is primed to a metering pump.

FIG. 3 is an explanatory view showing an example of a paint supply device used in the die coater of the present invention, and is an explanatory view showing a work state of filling paint into a die-side pipe and the like.

FIG. 4 is an explanatory diagram illustrating an example of a paint supply device used in the die coater according to the present invention, and is an explanatory diagram illustrating a work of quantitatively supplying paint to a die.

[Explanation of symbols]

 A: Die B: Paint supply device C: Die cleaning device 1: Paint container 2: Self-priming supply pump 7: Metering pump 11: Side plate 12: Side plate 13: Die 14: Die 15: Manifold 16: Slit 23: Fitting 24: Solvent tank 25: Self-priming supply pump

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-317778 (JP, A) JP-A-4-1044859 (JP, A) JP-A-5-285436 (JP, A) 76563 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B05C 5/02 B05C 11/10

Claims (4)

(57) [Claims] 1. A die (A), a paint supply device (B) and a die cleaning device (C), wherein the die (A) is arranged between upper and lower side plates (11) and (12). A manifold (15) is formed by the molds (13) and (14), and a slit (16) is formed at a tip end extending from the manifold, and a manifold (15) is formed on each side plate. Pipes (17) and (18) are connected to each other, and a valve (1) is connected to each pipe.
9) and (20), and a branch pipe (2) is provided between the side plate (11) of the pipe (17) and the valve (19).
1), a valve (22) is arranged in the branch pipe, and the paint supply device (B) is detachably connected to the pipe (17) of the die (A) by a joint (23),
The die cleaning device (C) is configured by arranging a self-priming supply pump (25) in a circulation path including a solvent tank (24), a branch pipe (21), a manifold (15), and a pipe (18). A die coater characterized in that: 2. A paint supply device (B) includes a paint container (1), a self-priming supply pump (2), one end of which is located in the paint contained in the paint container (1), and the other end of which is located in the paint container. A pipe (3) connected to the suction port of the self-priming supply pump (2), one end of which is located in the paint contained in the paint container (1) and the other end of the self-priming supply pump (2). A circulation path including a pipe (4) connected to the discharge port, and a downstream portion of the self-priming supply pump (2) in the circulation path and below a liquid level of the paint contained in the paint container (1). (A), the suction port is connected to the branch pipe (5), the discharge port is connected to the die side pipe (6), and in the paint container (1). 2. The pump according to claim 1, wherein the pump mainly comprises a metering pump provided at a position below the liquid level of the paint to be stored. Die coater. 3. A branch pipe (5) downstream of a self-priming supply pump (2) in a circulation path of a paint supply device (B).
A bypass pipe (8) branched from a position (b) upstream of the pipe and connected to the die-side pipe (6);
The die coater according to claim 2, wherein a valve (9) is provided in the bypass pipe. 4. A valve (10) provided between the self-priming supply pump (2) and the position (a) or between the positions (a) and (b). 3. The die coater according to 3.