JPH0634958B2 - Coating liquid supply device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coating liquid supply device for a coating machine, and more specifically, to a coating liquid such as a resin supplied from a coating liquid supply section, The present invention relates to a coating liquid supply device for supplying continuous strips such as running films, cloths, papers, and thin plates.

[Prior Art] As a coating machine for coating a solution such as a resin on a continuous strip-shaped material such as a film, a cloth, a paper or a thin plate, various types of coating machines have been conventionally known.

For example, as shown in FIG. 4, a backing roll (112) for holding and running a continuous strip, a doctor knife (11) for adjusting a coating liquid having an edge on a part of the roll peripheral surface (11).
A doctor type coating machine consisting of 6) is known.

In this coating machine, the coating liquid is applied to the upper surface of the continuous strip (110).
The means for supplying (111) is such that a dam plate (127) holds the coating liquid (111) in the portion where the continuous strip (110) between the backing roll (112) and the doctor knife (116) is inserted. It was a liquid dam type with a part (124).

With this liquid dam type, the coating liquid (111) pumped from the coating liquid supply unit (not shown) is stored in the liquid reservoir (124), and the continuous strip shape is formed by the opening below the liquid reservoir (124). It was supplied on the upper surface of the object (110). Coating liquid (11) for continuous strip (110)
To stop the supply of 1), apply the coating liquid from the coating liquid supply unit.
This was done by stopping the supply of (111).

[Problems to be Solved by the Invention] By the way, since the joint portion of continuous strips such as films, cloths, papers, and thin plates is superposed and thicker than other portions, the coating liquid is applied to the joint portion. When the coating is applied, the continuous strip becomes thicker, and the continuous strip may be cut when the continuous strip is inserted between the doctor knife and the backing roll. For this reason, it is desirable that the joint portion of the continuous strip be uncoated.

However, in the above-mentioned liquid dam type coating liquid supply means, even if the supply of the coating liquid (111) is stopped,
Since the coating liquid (111) remains in (124), an uncoated portion is formed in the width direction of the continuous strip (110) unless all the remaining coating liquid (111) is discharged. I couldn't do that. Therefore, it is difficult to form an uncoated portion in the width direction of the continuous strip such as a joint portion desired by the operator in accordance with the continuous strip (110) running by the backing roll (112). It required skill.

[Object of the Invention] In view of the above, the present invention provides a coating liquid supply device capable of immediately stopping the supply of the coating liquid in response to any portion such as a joint portion of a continuous strip. is there.

[Means for Solving the Problems] A coating liquid supply device according to the present invention is a coating liquid supply device for supplying a coating liquid to a continuous strip such as a film, cloth, paper, or thin plate that runs continuously. The liquid dam type liquid reservoir provided along the axial direction of the backing roll and the roll-shaped knife and the lower end of the liquid reservoir are provided along the width direction of the continuous strip. A coating liquid supply port is provided, and a rotary valve provided in the vicinity of the supply port along the width direction of the liquid reservoir is provided to open and close the supply port.

[Operation] In the coating liquid supply device having the above configuration, during normal coating, the rotary valve is operated to open the supply port, and the coating liquid in the liquid reservoir is supplied to the continuous strip through the supply port. And apply continuously.

When forming an uncoated part in the width direction of the continuous strip, the rotary valve is operated to close the supply port, and the coating liquid remaining on the continuous strip is discharged from here. Supply of the coating liquid can be stopped immediately.

Further, when the coating machine is stopped, by closing the rotary valve, the coating liquid remaining on the continuous strip side is simply discharged, and the supply of the coating liquid can be immediately stopped.
There is almost no time lag between the desired stop time and the actual stop time.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

(12) is a continuous strip (1) of film, cloth, paper, thin plate, etc.
0) is a backing roll for holding and traveling, and is rotatably supported by the frame (14).

Reference numeral (16) is a roll-shaped doctor knife, which is rotatably supported between the frames (14) above the backing roll (12), and is cut out at symmetrical positions on both sides of its outer peripheral surface in the longitudinal direction to form an edge. The section (18) (18) and the flat cutouts (20) (20) have a comma-shaped cross section.

Reference numeral (21) is a coating liquid supply device, the shape of which is formed so as to match the outer peripheral surfaces of the comma type doctor knife (16) and the backing roll (12). (22) is a coating liquid supply device (2
The body of 1) is formed to have substantially the same width as the comma type doctor knife (16) and the backing roll (12). The supply device (21) is detachably mounted on the backing roll (12) and a side portion of the comma type doctor knife (16). The body (22) of the supply device (21) is provided with a liquid reservoir (24) that is long in the width direction inside thereof, and a lid that can be opened and closed at the top.
(25) is provided. A pipe (26) for feeding the coating liquid (11) is attached to the lid (25),
1) is the pipe from the pump, which is the coating liquid supply unit (not shown)
It is pressure-fed to the liquid reservoir (24) through (26). As shown in FIG. 2, a supply port for the coating liquid (11) is provided at the bottom of the supply device (21).
(28) is provided parallel to the longitudinal direction of the backing roll (12), and the cross-sectional shape of this supply port (28) is such that the coating liquid (11) is at the top and the edge of the comma-type doctor knife (16) and the backing roll. (12) has a circular arc along the backing roll (12) so that the coating liquid (11) can be supplied between the supply port (28) and the outer peripheral surface of the backing roll (12). Is provided with a gap through which the continuous strip (10) can travel. Also, the supply port (28)
Is connected to the lower part of the liquid reservoir (24) via the coating liquid passage (30). In the vicinity of the supply port (28) of the coating liquid passage (30), a rotary valve (32) that is a valve for opening and closing the coating liquid passage (30) is provided in the axial direction, and the rotary valve (32) of the supply device (21) is Actuators (34) are provided on both sides. The rotary valve (32) is rotated by the actuator (34) to open and close the coating liquid passage (30). The actuator (34) may be controlled manually, but it may be controlled by a computer. Further, the material of the supply device (21) is synthetic resin such as Teflon so as not to scratch the outer peripheral surfaces of the comma type doctor knife (16) and the backing roll (12). The inner peripheral surface of the coating liquid passage (30) is not limited to the synthetic resin and may be formed of metal.

The operation of this embodiment will be described below.

To apply the coating liquid (11) to the continuous strip (10), the rotary valve (32) is rotated by the actuator (34) to open the coating liquid passage (30) and the backing roll (12). The coating liquid (11) is supplied from the supply port (28) to the upper surface of the continuous strip (10) which has come to the position of the supply port (28). Then, the continuous strip (10) is run in the gap between the backing roll (12) and the comma type doctor knife (16) to apply the coating liquid (11).

To form an uncoated part in the joint part of the continuous strip (10), the coating liquid passage (30) is provided by the rotary valve (32).
Is closed and the supply of the coating liquid (11) from the supply port (28) is stopped. In this case, the rotary valve (32) side and the supply port (28)
Since the coating liquid (11) remaining between and is extremely small,
There is almost no time lag between the operation time of the rotary valve (32) and the start time and stop time of the supply of the coating liquid (11),
It is possible to form a coated portion and an uncoated portion on desired portions of the continuous strip (10).

In addition, when the coating machine is stopped, the rotary valve (32)
By closing, the coating liquid (11) remaining on the continuous strip side can be discharged, and the supply of the coating liquid (11) can be immediately stopped. There is almost no time lag with time.

Further, when applying different coating liquids, the rotary valve (11) does not have to be cleaned to discharge the coating liquid (11) in the liquid reservoir (24) like a conventional supply device. The type of coating liquid (11) can be easily changed by plugging the supply device (21) after closing the coating liquid passage (30) with 32) and installing the supply device (21) containing different coating liquid. It can be replaced quickly and in a short time.

Not only the coating machine having the above structure, but also a coating machine in the same liquid dam type reverse roll coater system (see FIG. 3) may be provided with an on-off valve such as the rotary valve (32) as described above. If so, it is possible to easily control the supply of the coating liquid.

[Advantages of the Invention] As described above, the present invention can control the supply of the coating liquid only by operating the rotary valve provided in the vicinity of the supply port, and the operation time of the rotary valve and the supply of the coating liquid can be controlled. Since there is almost no time lag between the start time and the stop time,
It is possible to form a coated portion and an uncoated portion in the width direction of a desired portion such as a joint portion of a continuous strip that is continuously running.

Further, when the coating machine is stopped, by closing the rotary valve, the coating liquid remaining on the continuous strip side is simply discharged, and the supply of the coating liquid can be immediately stopped.
There is almost no time lag between the desired stop time and the actual stop time.

[Brief description of drawings]

 FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged vertical sectional view of an essential part in FIG. 1, FIG. 3 is an explanatory view of the second embodiment, and FIG. FIG. 7 is an explanatory diagram of a conventional example. Explanation of code 10 ...... Continuous strip 21 …… Supplier 22 …… Supplier main body 24 …… Liquid reservoir 28 …… Supply port 30 …… Coating liquid passage 32 …… Rotary valve

Continuation of the front page (72) Inventor Kyotomi Yoshimura 1 1-101 Kawai, Kawai-cho, Kitakatsuragi-gun, Nara Hirano Metal Co., Ltd. (56) References JP-A-60-143866 (JP, A) JP-A-62- 95169 (JP, A) JP 59-10359 (JP, A) JP 55-44672 (JP, B2) JP 10-18821 (JP, Y1)

Claims (1)

[Claims] 1. A coating liquid supply device for supplying a coating liquid to a continuous strip of film, cloth, paper, thin plate, etc., which runs continuously, in the axial direction of a backing roll and a roll-shaped knife. A liquid dam type liquid reservoir provided, a coating liquid supply port provided along the width direction of the continuous strip at the lower end of the liquid reservoir, and the liquid near the supply port. A coating liquid supply apparatus comprising a rotary valve provided along the width direction of the reservoir to open and close the supply port.