JP2017223280A - Intermittent valve, intermittent coating applying device and method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intermittent coating applying device that does not return coating liquid to a tank when forming a non-coating section by operating a metering pump.SOLUTION: An intermittent coating applying device includes: a valve body 2; a through-space 3 inside thereof; an inlet 4 for coating liquid provided in the through-space 3; an outlet 5; an on-off valve 6 for opening and closing the outlet; a capacity variable chamber 34 provided continuously to the through-space 3; and a variable actuator 40 for varying a capacity of the coating liquid in the capacity variable chamber 34.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an intermittent valve, an intermittent coating apparatus, and a method thereof.

  Conventionally, an intermittent coating apparatus that intermittently coats a coating liquid on a long web such as a film, fabric, paper, metal foil, or metal mesh has been proposed (for example, see Patent Document 1).

  In this conventional intermittent coating apparatus, an uncoated section and a coated section are alternately formed by a die on a web that is transported on a backup roll. When a valve is provided and an uncoated section is formed, the valve is closed to stop supplying the coating liquid to the die. On the other hand, when a coated section is formed, the valve is opened and applied to the die. Supply industrial fluid.

JP 2012-47245 A

  In the intermittent coating apparatus as described above, in order to form an uncoated section while the metering pump is operated, it is necessary to return the excess coating liquid to the tank when the valve to the die is closed. . For this reason, there is a problem that a loss occurs in the coating liquid, and the stabilization of intermittent coating is hindered.

  Therefore, in view of the above problems, the present invention provides an intermittent valve that does not return the coating liquid to the tank when an uncoated section is formed while the metering pump is operated, an intermittent coating apparatus using the intermittent valve, and a method thereof. The purpose is to do.

  The present invention provides a valve body, a passage space in the valve body, an inlet of a coating liquid provided in the passage space of the valve body, and the coating liquid provided in the passage space of the valve body. Outlet, opening and closing means for opening and closing the outlet, a variable volume chamber provided continuously with the passage space of the valve body, and a variable volume means for changing the volume of the coating liquid in the variable volume chamber Are intermittent valves.

  The present invention also provides the intermittent valve, a tank that stores the coating liquid, a metering pump that supplies the coating liquid stored in the tank to the inlet of the intermittent valve, and the intermittent valve. An intermittent coating apparatus having intermittent coating on a long web running the coating liquid supplied from an outlet.

  Furthermore, the present invention provides the intermittent valve according to claim 1, a tank that stores the coating liquid, and a metering pump that supplies the coating liquid stored in the tank to the inlet of the intermittent valve. A die that intermittently coats a long web that travels the coating liquid supplied from the outlet of the intermittent valve, and the metering pump per unit time at the inlet of the intermittent valve While the outlet of the intermittent valve is in a closed state in order to supply a certain amount of the coating liquid and form the uncoated section on the web, the capacity of the capacity variable chamber is changed using the variable means. In order to accumulate the coating liquid flowing in from the inlet in the capacity variable chamber and form the coating section in the web, the closed valve is closed while the outlet is open. Accumulated in the variable volume chamber during the condition The intermittent coating method, wherein the coating liquid is discharged by reducing the capacity of the capacity variable chamber using the capacity varying means, and is supplied to the die from the outlet together with the coating liquid flowing from the inlet. .

  According to the present invention, while the outlet is closed by the opening / closing means and the uncoated section is formed, the coating liquid flowing from the inlet of the intermittent valve is accumulated in the capacity variable chamber by the capacity variable means.

It is explanatory drawing of the intermittent coating apparatus which shows one Embodiment of this invention. It is explanatory drawing of an intermittent valve. It is a time chart which shows the intermittent coating method of an intermittent coating apparatus.

  Hereinafter, the intermittent coating apparatus 10 using the intermittent valve 1 of one Embodiment of this invention is demonstrated based on FIGS. 1-3.

  The intermittent coating apparatus 10 of the present embodiment intermittently coats a coating liquid on a long web W such as a film, fabric, paper, metal foil, metal mesh, and the like, along the conveyance direction of the web W. Thus, the coated section W1 and the uncoated section W2 are alternately formed.

(1) Configuration of Intermittent Coating Device 10 The intermittent coating device 10 includes an intermittent valve 1, a backup roll 12 that transports the web W, a die 14 that intermittently coats the web W with a coating liquid, and a tank 16 for coating liquid. A metering pump 18 for supplying a coating liquid in a fixed amount, and a control unit 20.

  The die 14 is disposed on the side of the backup roll 12 and is composed of an upper main body 22 and a lower main body 24, and tapers toward the tip. A liquid reservoir 26 is provided on the upper surface of the lower main body 24, and a slit 28 is provided between the upper main body 22 and the lower main body 24 and in the direction of the tip of the liquid reservoir 26. The tip of the slit 28 constitutes a coating liquid discharge port 30.

  The metering pump 18 supplies a constant amount ΔV0 of coating liquid per unit time from the tank 16 to the intermittent valve 1 at a predetermined rotational speed. The control unit 20 controls the rotation, stop, and rotation speed of the metering pump 18.

  The intermittent valve 1 intermittently supplies the coating liquid supplied from the metering pump 18 to the liquid reservoir 26 of the die 14 under the control of the control unit 20. The configuration of the intermittent valve 1 will be described below.

(2) Intermittent valve 1
The configuration of the intermittent valve 1 will be described with reference to FIG. The valve body 2 of the intermittent valve 1 is L-shaped, and a passage space 3 is formed therein. An inlet 4 for the coating liquid is opened at one end of the passage space 3, and a pipe such as a hose is connected to the metering pump 18. An outlet 5 is opened at the other end of the L-shaped bent passage space 3 of the passage space 3, and a tube such as a hose toward the liquid reservoir portion 26 of the die 14 is connected thereto.

  An opening / closing valve 6 is provided in the vicinity of the outlet 5 of the passage space 3. The on-off valve 6 has a valve seat 7 provided on the inner periphery of the outlet 5 and a valve body 8 that closes the opening of the valve seat 7. The valve body 8 is provided with a shaft 9. Yes. The shaft 9 is moved linearly by a direct acting opening / closing actuator 32. The opening / closing actuator 32 is constituted by, for example, a voice coil motor, a linear motor, an air cylinder or the like.

  In the vicinity of the entrance 4 of the passage space 3, a cylindrical capacity variable chamber 34 is provided continuously with the passage space 3. A piston 36 is provided in the variable capacity chamber 34, and a shaft 38 is connected to the piston 36. The shaft 38 is moved linearly by a direct acting variable actuator 40. The variable actuator 40 includes a voice coil motor, a linear motor, and an air cylinder. As the piston 36 moves linearly by the variable actuator 40, the capacity of the capacity variable chamber 34 changes.

  The control unit 20 controls the opening / closing actuator 32 and the variable actuator 40.

(3) Control Method of Intermittent Coating Device 10 Next, a method in which the control unit 20 performs intermittent coating on the web W using the intermittent coating device 10 will be described with reference to FIGS. In FIG. 3, when the piston 36 reaches the upper limit, the capacity of the variable capacity chamber 34 is minimized, and when the piston 36 reaches the lower limit, the capacity of the variable capacity chamber 34 is maximized.

  The control unit 20 rotates the backup roll 12 according to the conveyance speed v of the web W.

  The control unit 20 always supplies the coating solution to the inlet 4 of the intermittent valve 1 by ΔV0 per unit time (every hour) to the intermittent valve 1 by the metering pump 18.

  The control unit 20 does not need to send the coating liquid to the die 14 while the uncoated section W2 is formed on the web W at times t1 to t2 in FIG. 3, and therefore opens and closes using the variable actuator 40 at time t1. Valve 6 closes outlet 5. However, since the coating liquid of ΔV0 per hour from the metering pump 18 flows into the passage space 3 from the inlet 4 as described above, the control unit 20 uses the variable actuator 40 according to the amount of the coating liquid that flows in. The piston 36 is lowered from the upper limit, and the capacity of the capacity variable chamber 34 is increased by ΔV0 every hour in direct proportion to the time t. As a result, the coating liquid flowing from the inlet 4 accumulates in the variable capacity chamber 34. When the piston 36 reaches the lower limit position at the time t2, all the amount V1 of the coating liquid flowing from the inlet 4 is accumulated in the variable capacity chamber 34. That is, ΔV0 (t2−t1) = V1.

  Next, the control unit 20 moves the valve body 8 of the on-off valve 6 using the variable actuator 32 while forming the coating section W1 of the times t2 to t3 on the web W, and opens the valve seat 7. Open outlet 5 at aging t2. At the same time, the control unit 20 raises the piston 36 from the lower limit by using the variable actuator 40, discharges all the coating liquid accumulated in the capacity variable chamber 34 by ΔV1 every hour in direct proportion to the time t, and flows from the inlet 4. It is discharged every hour (ΔV0 + ΔV1) from the outlet 5 together with the coating liquid. As a result, the amount of coating liquid supplied to the die 14 at times t2 to t3 is V0 + V2 = (ΔV0 + ΔV1) (t3−t2). The amount supplied every hour is determined by the thickness of the coating section of the web W. For example, if the thickness of the coating section W1 is d and the width of the coating section W1 is f, (ΔV0 + ΔV1) = d × f.

  Thereafter, the control unit 20 repeats the same control to form the coating section W1, the uncoated section W2, and the web W with the die 14.

(4) Effect According to the present embodiment, while the uncoated section W2 is formed, the capacity of the variable capacity chamber 34 is increased and the coating liquid supplied from the metering pump 18 is stored in the variable capacity chamber 34. Therefore, the operation of returning to the tank 16 as in the prior art becomes unnecessary, and the loss of the coating liquid is eliminated.

  Further, during the formation of the coating section W1 on the web W, the coating liquid accumulated in the variable capacity chamber 34 is simultaneously discharged in addition to the coating liquid flowing from the inlet 4, so that the coating section W1 is always stably provided. Can be formed.

  Further, since the piston 36 that increases and decreases the capacity of the capacity variable chamber 34 moves in direct proportion to the time t, the metering pump 18 can supply a constant amount of coating liquid every hour.

(5) Modified example In the above embodiment, there is no configuration for discharging the coating liquid in the intermittent valve 1, but when the metering pump 18 is stopped, the coating state is not affected. A discharge port for discharging the coating liquid in the passage space 3 and the variable capacity chamber 34 may be provided.

  Moreover, in the said embodiment, although intermittent coating was performed with the die | dye 14, you may perform intermittent coating with this other coating means, and also in that case, the intermittent valve 1 of the said embodiment is used for the coating means. Apply.

  Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Intermittent valve, 2 ... Valve body, 3 ... Passing space, 4 ... Inlet, 5 ... Outlet, 6 ... On-off valve, 7 ... Valve seat, 8 ... -Valve body, 9 ... shaft, 10 ... intermittent coating device, 12 ... backup roll, 14 ... die, 16 ... tank, 18 ... metering pump, 20 ... control , 32 ... Opening / closing actuator, 34 ... Variable capacity chamber, 36 ... Piston, 38 ... Shaft, 40 ... Variable actuator

Claims (10)

A valve body;
A passage space in the valve body;
An inlet of a coating liquid provided in the passage space of the valve body;
An outlet of the coating liquid provided in the passage space of the valve body;
Opening and closing means for opening and closing the outlet;
A variable volume chamber provided continuously with the passage space of the valve body;
Capacity variable means for changing the capacity of the coating liquid in the capacity variable chamber;
Intermittent valve with. The opening / closing means is an opening / closing valve provided in the outlet,
The on-off valve is
A valve seat provided in the outlet;
A valve body that slides against the valve seat;
A direct acting open / close actuator that linearly moves the valve body;
The intermittent valve according to claim 1. The capacity varying means is
A piston for changing the capacity of the capacity variable chamber;
A direct acting variable actuator that linearly moves the piston;
The intermittent valve according to claim 1. The intermittent valve according to claim 1;
A tank for storing the coating liquid;
A metering pump for supplying the coating liquid stored in the tank to the inlet of the intermittent valve;
A coating means for intermittently coating a long web running the coating liquid supplied from the outlet of the intermittent valve;
An intermittent coating apparatus. The coating means is a die,
The intermittent coating apparatus according to claim 4. A control unit;
The controller is
Supplying a constant amount of the coating liquid per unit time to the inlet of the intermittent valve by the metering pump,
In order to form the uncoated section in the web, while the outlet of the intermittent valve is closed, the capacity of the capacity variable chamber is increased using the variable means and flows from the inlet. The coating liquid is stored in the capacity variable chamber,
In order to form the coating section in the web, the capacity variable means is used to apply the coating liquid accumulated in the capacity variable chamber during the closed state while the outlet of the intermittent valve is open. Reducing the capacity of the capacity variable chamber and discharging, and supplying the die from the outlet together with the coating liquid flowing in from the inlet,
The intermittent coating apparatus according to claim 4. The control unit uses the capacity variable means to store all of the intermittent valve by storing the same amount of the coating liquid flowing in from the inlet every hour while the outlet of the intermittent valve is closed. ,
The intermittent coating apparatus according to claim 5. The control unit uses the capacity variable means to apply the same amount of the coating liquid stored in the capacity variable chamber while the outlet of the intermittent valve is closed to the same amount per hour when the outlet is open. Discharge all while discharging,
The intermittent coating apparatus according to claim 5. The control unit includes a discharging unit that discharges the coating liquid from the intermittent valve when the metering pump is stopped.
The intermittent coating apparatus according to claim 4. The intermittent valve according to claim 1;
A tank for storing the coating liquid;
A metering pump for supplying the coating liquid stored in the tank to the inlet of the intermittent valve;
A die that intermittently coats a long web running the coating liquid supplied from the outlet of the intermittent valve;
Have
The metering pump supplies a constant amount of the coating liquid per unit time to the inlet of the intermittent valve,
In order to form the uncoated section in the web, while the outlet of the intermittent valve is closed, the capacity of the capacity variable chamber is increased using the variable means and flows from the inlet. The coating liquid is stored in the capacity variable chamber,
In order to form the coating section in the web, the capacity variable means is used to apply the coating liquid accumulated in the capacity variable chamber during the closed state while the outlet of the intermittent valve is open. Reducing the capacity of the capacity variable chamber and discharging, and supplying the die from the outlet together with the coating liquid flowing in from the inlet,
Intermittent coating method.

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