JPH0263574A - Coating liquid supplying device for doctor type coater - Google Patents

Abstract

PURPOSE:To easily and distinctly form non-coated parts with the coater which can make striped coating of a continuous band-shaped object by placing plural pieces of supplying devices having liquid reserving parts and supply ports apart prescribed spacings in parallel with the transverse direction of the continuous band-shaped object. CONSTITUTION:Plural pieces of the coating liquid supplying devices 22 provided with the liquid reserving parts and the supply ports and the valves to open and close the supply ports at the lower ends thereof are disposed apart the spacings corresponding to the width (a) in the non-coated part of the continuous band-shaped object 10. The coating liquid 11 is supplied to the band-shaped object 10 traveling in the parts of the supply ports and the coating liquid 11 is not supplied to the parts traveling between the adjacent two supply ports in this way. The non-coated parts of the width (a) are thus formed longitudinally. The change of the width (a) of the non-coated parts is executed by changing the spacings of the bodies 22 and the formation of the non-coated parts further in the transverse direction of the band-shaped object 10 is executed by making open and close operations of the above-mentioned valves.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a coating liquid supply device for a doctor-type coating machine, and more specifically, to a coating liquid supply device for a running continuous strip of film, fabric, paper, thin plate, etc. The present invention relates to a coating liquid supply device that supplies a coating liquid such as a resin.

[Prior Art] Various types of doctor coating machines have been known for coating solutions such as resin onto long webs such as films, fabrics, paper, thin plates, etc. .

For example, a doctor type coating machine is known, which includes a packing roll (112) for holding and running a continuous strip, and a doctor knife (11B) having an edge on a part of the roll circumferential surface for adjusting the coating liquid.

In this coating machine, the means for supplying the coating liquid (111) to the upper surface of the continuous strip (110) includes a dam plate (127) that forms a liquid reservoir (124) for the coating liquid (111).
, packing roll (112) and doctor knife (II)
G) is installed in the part where the continuous strip (110) is inserted, and the coating liquid (111) pumped from the coating liquid supply section is supplied from the lower part of the liquid reservoir to the upper surface of the continuous strip (110). It was a liquid dam type that was designed to supply water.

In this liquid dam type, when forming an uncoated part along the longitudinal direction of the continuous strip (110), that is, to perform stripe coating, as shown in FIG. A long, extremely thin plate spacer (115) made of steel or synthetic resin film is sandwiched between the packing roll (112) and the doctor knife (118) in the uncoated area. Spacer (11
The uncoated portion was formed by preventing the coating liquid from being applied to the continuous strip (110) by the width of 5).

[Problems to be Solved by the Invention] However, the above-mentioned means for forming the uncoated portion is smooth (115) and packing roll (11).
2) and the doctor knife (11B) required skill. Also, while the coating machine is operating, continuous strips (1
When changing the position of the uncoated part 10), it is necessary to move this spacer (115), and in this moving operation, the spacer (115) is cut and the coating operation is forced to stop. was there. In addition, a spacer (
115) and the continuous strip (110), the coating liquid (11
There was also a problem in that the uncoated band 1) penetrated and became jagged.

[Object of the Invention] In view of the above, the present invention provides a coating liquid for a doctor-type coating machine that can easily perform stripe coating that forms coated portions and uncoated portions in the width direction of a continuous strip. A supply device is provided.

[Means for Solving the Problems] A coating liquid supply device for a doctor-type coating machine according to the present invention has a main body provided with a coating liquid reservoir and a supply port parallel to the width direction of a continuous strip. A plurality of strips are placed on the main body, and the interval between the supply ports of adjacent main bodies is adjusted to match the width of the uncoated portion of the continuous strip.

Further, a valve for opening and closing the supply port is provided near the supply port of the main body.

[Operation] The coating liquid supply device of the doctor-type coating machine having the above configuration is arranged so that the supply port of the main body of the device, which is placed parallel to the width direction of the continuous strip, is aligned with the coating part of the continuous strip. At the same time, the interval between the supply ports of adjacent main bodies is determined in accordance with the width of the uncoated portion of the continuous strip. As a result, the coating liquid is supplied to the continuous strip running at the position of the supply port.
The coating liquid is not supplied to the continuous strip running between adjacent supply ports, and uncoated portions are formed.

In addition, during normal coating, a valve is operated to open the supply port, and the coating liquid in the liquid reservoir is supplied from the supply port to the continuous strip for continuous coating. Furthermore, in order to form an uncoated part in the width direction of the continuous strip, operate the valve to open the supply port 1! /
7, the supply of the coating liquid can be immediately stopped by simply discharging the coating liquid remaining on the continuous strip side from this valve.

[Example] Hereinafter, one embodiment of the present invention will be described based on the drawings.

(12) is a packing roll that holds and runs a continuous strip (10) such as film, fabric, paper, thin plate, etc., and is rotatably supported by a frame (14).

(16) is a roll-shaped doctor knife, which is rotatably supported between the frames (14) above the packing roll (2), and has longitudinal notches at symmetrical positions on both sides of its outer circumferential surface. It has a comma-shaped cross section with edge portions (1g) (18) and flat notches (20) (20).

(22) is a supply device for the coating liquid (11), and the width of the supply device (22) shown in the figure is so large that three units can be placed in the width direction of the continuous strip (10). Three units are placed parallel to Growl (12). These three supply devices (
The intervals at which the main bodies (23) of 22) are placed can be set arbitrarily.

The shape of the main body (23) of each supply device (22) is formed to match the outer circumferential surface of the comma-shaped doctor knife (16) and the packing roll (12). Base material (lO) between the bottom
is designed to run.

Inside the main body (23), there is a liquid reservoir (24) that is long in the width direction.
), and a lid (25) that can be opened and closed is provided at the top. Coating liquid (11) is used for this i (25).
A vibrator (26) is attached to feed the coating liquid (11) from a pump (not shown) which is a coating liquid supply part to a liquid reservoir part (24) through this pipe (26). be pumped. A coating liquid passageway (3) is provided at the bottom of the supply device (22).
A supply port (28) for the coating liquid (11) connected to the lower part of the liquid reservoir (24) via the packing roll (1
2) It is provided parallel to the longitudinal direction. This supply port (
28) has a cross-sectional shape in which the coating liquid (
11) is formed in an arc shape along the packing roll (12), and a gap is provided between the lO port (28) and the packing roll (12) through which the continuous strip (10) can run. It is being

A rotary valve (32), which is a valve for opening and closing the coating liquid passage (30), is provided near the supply port (28) of the coating liquid passage (30), and a rotary valve (32) that opens and closes the coating liquid passage (30) is provided on both sides of the supply device (22). An actuator (34) is provided in the section. This actuator (34) causes the rotary valve (32) to
is rotated to open and close the coating liquid passageway (30). Note that the opening/closing operation may be performed so that the three supply devices (22) can be operated individually, or the three supply devices (22) may be operated in conjunction with each other. Furthermore, the actuator (34)
The control may be performed manually, but it may also be controlled by a computer. Feeding device (
The material of 22) is a synthetic resin such as Teflon, and is designed to prevent scratches on the outer peripheral surfaces of the comma-shaped doctor knife (1G) and the packing roll (12). Note that the peripheral surface of the coating liquid passageway (30) is not limited to the synthetic resin described above, and may be formed of metal.

The operation of this embodiment will be explained below.

First, the supply port (28) of the main body 23) placed parallel to the width direction of the continuous strip (10) is connected to the continuous strip (10).
The adjacent main body (
23) determine the distance between the supply ports (28) (see FIG. 3).

To apply the coating liquid (11) to the top surface of the continuous strip (10), the rotary valve (32) is moved by the actuator (3).
4) to open the coating liquid passageway (30), and the coating liquid (11) is applied to the upper surface of the continuous strip (10) that has come to the position of the supply port (28) by the packing roll (12).
is supplied from the supply port (28) to form the coated portion of the width plate in the longitudinal direction. On the other hand, the supply port (28) and the supply port (28)
A coating liquid (11) is applied to the continuous strip (10) that runs between the
Since no coating is supplied, an uncoated portion with a width a is formed in the longitudinal direction. The formed band-shaped uncoated portion is straight instead of jagged as in the conventional case. In order to change the width a of the uncoated portion, it is sufficient to change the interval between the main bodies (23) (23), and this can be easily done even during the coating operation.

In this example, three main bodies (23) were used to provide two uncoated parts, but the invention is not limited to this. For example, if three or more uncoated parts are newly formed, five main bodies (23) may be used. The body of (2
3) should be placed.

In order to form uncoated areas at joints in the width direction of the continuous strip (10), the coating liquid passageway (30) is blocked by the rotary valve (32), and the flow from the supply port (28) is The supply of the coating liquid (11) may be stopped. In this case,
Since the coating liquid (11) remaining between the rotary valve (32) side and the supply port (28) is extremely small, the operation time of the rotary valve (32) and the coating liquid ([1) There is almost no time lag between the start time and the stop time of supply, and it is possible to form coated portions and uncoated portions at desired portions in the width direction of the continuous strip (10). Also,
When the coating machine is stopped, the rotary valve (32) is closed to minimize leakage of the coating liquid (11).

When applying a different coating liquid, there is no need to drain the coating liquid (11) in the liquid reservoir (24) and clean the inside like in a conventional supply device by using the rotary valve (32). After closing the coating liquid passageway (30) with the supply device (22
) and attaching a supply device (22) containing a different coating liquid, the type of coating liquid (11) can be changed easily and in a short time.

In addition, in the above embodiment, the main body (23
) are provided in parallel with the packing roll (12), but the present invention is not limited to this, and the interior of one feeding device (22) may be divided into a plurality of sections to form the main body (23), and each section may be A structure in which a liquid reservoir (24) and a supply port (28) are provided may be used. Further, the above embodiment is suitable for pumping a high viscosity coating liquid by the method of pumping the coating liquid (11) from the vibrator (26).
The coating liquid (
11) may be used.

[Effects of the Invention] As described above, the present invention is characterized in that the spacing and number of main bodies of the feeding device are determined and arranged in accordance with the width and the number of the vermilion coated upper portions to be formed in the longitudinal direction of the continuous strip. For example, the vermilion coated upper portion can be easily formed. In addition, the formed band-shaped vermilion upper portion can be formed in a straight line, and does not have jagged edges as in the conventional case.

In addition, when an on-off valve is installed near the supply port, the supply of coating fluid can be controlled, and there is almost no time lag between the operating time of the on-off valve and the time of supplying or stopping the coating fluid, so it is possible to control the supply of coating fluid. A coated portion and a vermilion-coated upper portion can be formed in the width direction at the joints of continuous strips.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing an embodiment of the present invention.
FIG. 1 is an enlarged longitudinal cross-sectional view of a main part, FIG. 3 is a cross-sectional view of FIG. 1, and FIG. 4 is a perspective view of a conventional example. Explanation of symbols 10... Continuous strip 22... Feeding device 23... Body 24 of the feeding device... Liquid reservoir 28... Supply port 30...Coating liquid passage 32...Rotary valve Figure 2 Patent application Hitohirano Metal Co., Ltd.

Claims (1)

[Claims] 1. In a doctor-type coating machine, a plurality of apparatus main bodies each provided with a coating liquid reservoir and a supply port are placed parallel to the width direction of a continuous strip, and adjacent 1. A coating liquid supply device for a doctor-type coater, characterized in that the interval between supply ports of a main body can be adjusted to the width of an uncoated portion of a continuous strip. 2. The coating liquid supply device for a doctor-type coating machine according to claim 1, further comprising a valve for opening and closing the supply port provided in the vicinity of the supply port of the main body.