JPH0538477A - Coating device - Google Patents

Abstract

PURPOSE:To manufacture, disassemble and clean and install easily and make durable for a long time use by forming a folded section as coating width regulating plates on both ends of a slit of a coating head and providing a soft packing and side plate on said folded section. CONSTITUTION:In an extrusion type coating device, coating liquid is applied while approaching an end of a slit 3 of a coating head composed of a front edge 5 face and a back edge 4 face on the surface of a flexible substrate 1 running continuously. The shape of plastic or metal components 6 disposed on both ends of the slit 3 of said coating head and regulating the coating width of coating liquid is provided with folded sections on the coating head side face, and a soft packing 7 and a side plate 8 are provided on said folded section. As a result, manufacture, disassembly and cleaning and installation are easy and durability is good for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion type coating apparatus, and more particularly to an improved coating width regulating material.

[0002]

BACKGROUND OF THE INVENTION The coating width regulating material in an extrusion type coating device is a slit width for regulating a coating width when a coating liquid is applied on a flexible support (hereinafter, also referred to as a web). It controls the outflow of the coating liquid from the side, but it is necessary that it can be easily disassembled and cleaned when the coating liquid is changed or dirt is attached due to long-term application, and that the mounting can be done easily and accurately. Is. Therefore, many methods have been proposed in the past.

For example, Japanese Patent Application Laid-Open No. 61-257263 has a coating device in which the back edge apex angle portion corresponding to the position of the coating width regulating plate is chamfered, but the effect is not sufficient, and 61-257268.
No. 6, there is a method of applying a solvent in advance to a portion outside the application width, but the method is difficult and the effect is not stable. Further, in Japanese Patent Laid-Open No. 62-152563, there is disclosed a method in which at least a part of the edge portion on the center side of the slit is lengthened toward the inside of the slit and the gap is sealed with a filling material. On the contrary, a method of shortening the length of the slit and sealing with a filler is also disclosed. In each of these methods, it is necessary to test in advance how long the slit should be to improve the finish of the edge portion according to the physical properties of the coating solution. Further, it is difficult to select a filling material and the degree of filling, cleaning is troublesome, does not last long, and there is a problem that it is useless by disassembly cleaning.

Japanese Unexamined Patent Publication No. 3-89969 discloses a metal coating width regulating plate having an edge curvature of 0.5 mm or less and a slit gap of 1/2.
Although the coating width regulating plate of within the range is disclosed, there is a problem that it is difficult to manufacture and attach.

Although various methods have been proposed as described above, the current situation is that none of them is sufficiently satisfactory.

[0006]

SUMMARY OF THE INVENTION With respect to the above problems, an object of the present invention is to provide a coating apparatus having a coating width regulating plate which is easy to manufacture, disassemble, clean, and attach and can withstand long-term use. Is.

[0007]

SUMMARY OF THE INVENTION The above object of the present invention is to apply a coating solution to a surface of a flexible support which is continuously running, while bringing a slit tip portion of a coating head having a front edge surface and a back edge surface close to each other. In a rouge type coating device, the shape of a plastic or metal member disposed at both ends of the slit of the coating head to regulate the coating width of the coating liquid has a bent portion on the side surface of the coating head, and is flexible to the bent portion. This is achieved by a coating device characterized in that a packing and a side plate are provided.

The present invention will be specifically described below.

FIG. 1 is a perspective view of an extrusion coating apparatus having a coating width regulating plate of the present invention. In the figure, 1 is a running web, and 2 is an extrusion coating device. The coating device has a slit 3 for flowing out the coating liquid, the edge of the slit on the coating direction side is a back edge 4, and the opposite side is a front edge 5.
A packing 7 and side plates are provided on both sides of the coating device 2. As shown in the drawing, the coating width regulating plate 6 of the present invention has a bent portion on the side surface of the coating head, and the packing 7 and the side plate 8 are provided thereon. The coating width regulating plate of the present invention has the following features. Have.

The material for the coating width regulating plate may be metal or plastic. Since the coating width regulating plate has a bend, the mounting position can be accurately set, and when disassembling, it can be easily pulled out by grasping the portion.
The use of a soft packing has the characteristic that it fits well into the bent part of the coating width regulating plate and does not leak liquid. The side plates can be machined normally without any particular care in terms of mechanical precision and surface finish precision, which is advantageous in terms of cost. It has a good effect of controlling the coating width without any special rounding of the side plate. Also, no adhesive may be used.

The rubber hardness of the soft packing is preferably about 45 ° (JIS hardness).

Further, points to be noted in mounting the coating width regulating plate of the present invention will be described.

FIG. 2 is an explanatory perspective view showing a method of inserting the coating width regulating plate. When installing the coating width regulating plate, insert the coating width regulating plate into the folds by closing the slit ends on both sides of the coating device. The upper end of the coating width regulating plate is aligned with the edge of the slit as much as possible. If it protrudes above the edge or is drawn too far from the edge, it causes thick film at the end. Also,
It is preferable that the folded-in portion 61 of the coating width regulating plate has an inclined shape which is larger than the inclination of the coating device. This is to completely cover this portion with packing.

FIG. 3 is an explanatory perspective view showing a method of attaching the side plate.

The packing is sandwiched between the side plate and the coating apparatus main body, and the side plate 8 is attached to the coating apparatus main body with bolts. At this time, since the packing is soft and the sealing property is good, the bolts can be tightened only lightly and the workability is excellent.

[0016]

EXAMPLES The effects of the present invention will be illustrated below with reference to examples.

Example 1 In the coating apparatus of FIG. 1, the coating width regulating plate had a thickness of 200 μm, the material thereof was polyethylene terephthalate, and the length of the bent portion was 10 mm.

The packing was a silicon rubber plate, the rubber hardness was Shore A 45 °, and the side plate was SUS27 stainless steel. To make the edge surface, the coating width control plate was taken out a little longer than the edge surface, sandwiched, and cut with a cutter knife.
In the case of metal, hold the side of the coating width control plate and align the tip with the edge surface. This method may also be used for plastics.

With such a method, the coating width regulating plate is easier to remove and install than the conventional method, and therefore, disassembly and cleaning are easy and stable coating width regulation is possible even in long-time coating. It was

[0020]

According to the present invention, it is possible to provide a coating apparatus having a coating width regulating plate which can be easily manufactured, disassembled, washed and attached and can be used for a long time.

[Brief description of drawings]

FIG. 1 is a perspective view of a coating device having a coating width regulating plate of the present invention.

FIG. 2 is an explanatory perspective view showing a method for attaching a coating width regulating plate.

FIG. 3 is an explanatory perspective view showing a method of attaching the packing and the side plate.

[Explanation of symbols]

 1 web 2 coating device 3 slit 4 back edge 5 front edge 6 coating width regulation plate 7 packing 8 side plate

Claims (1)

[Claims] 1. A surface of a flexible support that continuously runs,
In an extrusion type coating apparatus that coats the coating liquid while bringing the leading end of the slit of the coating head consisting of the front edge surface and the back edge surface close to each other, the coating width of the coating liquid is provided at both ends of the slit of the coating head. An application device characterized in that the shape of a plastic or metal member to be regulated has a bent portion on a side surface of an application head, and a soft packing and a side plate are provided on the bent portion.