JP2571043Y2 - Blade structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blade structure of a roller curtain coating apparatus using a steel plate as an object to be coated.

[0002]

2. Description of the Related Art Conventionally, as a coating technique using a curtain flow, a slit method and an overflow method are known. For example, the slit method supplies paint to the head,
Discharge from the slit gap to form a curtain. In this method, a predetermined coating film thickness is obtained by adjusting the coating viscosity and the slit gap. The overflow method changes properties such as surface tension and viscosity of the paint while diluting the paint with a solvent.
The coating material adjusted to an appropriate coating viscosity in this way overflows from the container to form a curtain. In this method, a predetermined coating film thickness is obtained by adjusting the coating viscosity and the like.

Further, in recent years, a curtain coater using a roller system has been developed. In this roller system, a paint whose viscosity has been adjusted in advance is supplied to a roll gap between a coating rubber roll and a metal doctor roll and discharged, and the coating is applied to the coating rubber roll. Scraping off with the blade in contact. The scraped paint flows down along the blade to form a paint curtain, and is applied to a steel plate or the like passing below the blade. FIG. 3 shows a conventional roller curtain coating apparatus. In the roller curtain coating apparatus shown in FIG. 3, the coating material stored between the coating roll 1a and the doctor roll 1b is moved from the gap between the coating roll 1a and the doctor roll 1b to the surface of the coating roll 1a by the rotation of the coating roll 1a. It is discharged downward along. Reference numeral 3 denotes a blade arranged in the axial direction of the coating roll 1a, which scrapes the coating from the surface of the coating roll 1a to form a coating curtain 6 and flows down.

[0004] The remaining paint scraped off by the blade is stored in a paint tank 2 provided below.
This roller curtain coater adjusts the rotation speed of the coating roll 1a and the gap between the coating roll 1a and the doctor roll 1b, thereby controlling the coating curtain 6 having a desired film thickness.
Is obtained. As described above, the curtain coating apparatus is configured by a device that performs coating by freely dropping the paint curtain 6 from above the steel plate, which is the object 4 to be moved. On the other hand, since the width of the paint curtain 6 needs to be maintained, the flow-down width is adjusted by providing the side chain 5 so as to extend along the inner bottom surface of the paint tank 2 and the flow-down guide (not shown). Is what you do.

[0005]

Under the above-mentioned structure, there is a conventional one having a mechanism for moving the blade up and down and moving forward and backward, but no method for finely adjusting the deflection of the blade has been performed. Depending on the cause of the deflection of the blade, uneven paint scraping of the blade occurs, and as a result,
This causes unevenness and curtain spots on the coating film, and the coating film on the object to be coated lacks smoothness and a uniform film, and is extremely harmful. This phenomenon is particularly likely to occur when the object to be coated is wide, and the cause of the phenomenon is extremely likely to occur. In view of these problems, the present invention aims to provide a blade structure that aims to obtain a smooth and uniform coating film by preventing the blade from scraping unevenly by suppressing the deflection of the blade. .

[0006]

Means for Solving the Problems Accordingly, the inventors of the present invention have made extensive efforts to solve the problems of the prior art and to finely adjust the deflection of the blade in order to achieve the above object. It is a solution to the problem, and the point of the invention is that the paint film adhering to the surface of the coating roll is peeled off with a blade, a paint curtain is formed, and it hangs down on a plate-shaped workpiece, A blade of a roller curtain coating apparatus for forming a coating film on the plate-like workpiece,
The blade structure is characterized in that a hydraulic jack is provided on the rear surface of the blade to press and bend the blade.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing a blade structure of a roller curtain coating apparatus according to the present invention. In FIG. 1, the paint stored between the coating roll 1a and the doctor roll 1b is discharged downward along the surface of the coating roll 1a from the gap between the coating roll 1a and the doctor roll 1b by the rotation of the coating roll 1a. . In this case, the blade 3 disposed in the axial direction of the coating roll 1 a causes the coating roll 1 a
The paint is scraped off from the surface of the substrate to form a paint curtain 6. The remaining paint scraped off by the blade 3 is stored in a paint tank 2 provided below. This roll curtain coater can control the rotation speed of the coating roll 1a,
By adjusting the gap between the coating roll 1a and the doctor roll 1b, a coating curtain 6 having a desired film thickness can be obtained. As described above, the curtain coating apparatus performs the coating by freely dropping the paint curtain from above the steel plate as the object to be moved.

[0008] In this case, if the blade is bent during scraping of the paint of the blade, unevenness of the scraping of the paint of the blade is generated. . Particularly when the paint curtain is wide, the blade is significantly bent. Therefore,
It is necessary to prevent the blade from bending. The blade of this coating machine is usually made of aluminum alloy or stainless steel such as SUS in consideration of solvent resistance. However, SUS has extremely poor workability. On the other hand, aluminum has good workability but low strength, so that it tends to bend as described above, and therefore has a drawback that it is difficult to obtain linearity, and it is necessary to solve this.

FIG. 2 is a sectional view showing a blade structure according to the present invention. According to FIG. 2, the blade teeth 12 are fixed in a sandwiched state by the blade holders 7, 8, and the blade teeth 12 form teeth having a fixed length h.
On the other hand, by disposing the blade holder frame 10 in the length direction of the blade holder 8, the blade holders 7 and 8 are supported, and the blade holder frame 10 is, as shown in FIG. The gap adjustment for maintaining the gap with the coating roll 1a and the pressing of the blade holder frame 10 are performed. Moreover, this air cylinder 11 is used for the coating roll 1a.
Are arranged in the length direction.

Normally, the blade holder frame 10 is held only by the air cylinder 11.
If only the air cylinder 11 is pressed, the center portion in the length direction is bent as described above. For this purpose, the present invention provides a hydraulic jack 9 as a pressing mechanism at a position where the bending is likely to occur, and the pressing of the hydraulic jack 9 prevents the blade from bending in the longitudinal direction. That is, the hydraulic jack 9 is provided inside the blade holder frame 10 for holding the blade, and the bending in the length direction of the blade is corrected to prevent a coating defect due to uneven paint scraping.

As described above, with respect to the contact mechanism between the coating roll and the blade, an elevating mechanism (not shown) for raising and lowering the entire blade is provided. First, the blade is moved closer to the coating roll 1a, and then the blade is moved back and forth. The air cylinder 11 and the hydraulic jack, which are mechanisms for adjusting and controlling the contact force in the length direction of the blade after the blade holder frame 10 is moved forward and positioned on the coating roll 1a by a forward / backward moving mechanism (not shown). 9, the blade holder frame 10 is finely adjusted and fixed by the holding action.

[0012]

[Effects of the Invention] As described above, the configuration of the present invention corrects the deflection in the length direction of the blade, thereby preventing paint defects due to paint scraping unevenness and improving the paint yield. It is possible to improve the coating quality and the coating quality, and it is extremely effective industrially.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a blade structure of a roller curtain coating apparatus according to the present invention;

FIG. 2 is a sectional view showing a blade structure according to the present invention;

FIG. 3 is a view showing a conventional roller curtain coating apparatus.

[Explanation of symbols]

 1a Painting Roll 1b Doctor Roll 2 Painting Tank 3 Blade 4 Workpiece 5 Side Chain 6 Painting Curtain 7,8 Blade Holder 9 Hydraulic Jack 10 Blade Holder Frame 11 Air Cylinder 12 Blade Teeth

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kazuya Ouchi 1 Kimitsu, Kimitsu-shi, Chiba Nippon Steel Corporation Kimitsu Works (72) Kenji Yamamoto 1 Kimitsu, Kimitsu-shi, Chiba New Japan Kimitsu Works (56) References JP-A-2-273568 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A paint film adhered to the surface of a coating roll,
And peeling the blade and to form a color curtain allowed hanging on the plate-like material to be coated, a blade roller curtain coating apparatus for forming a coating film on said plate material to be coated, a hydraulic jack to the blade rear A blade structure for pressing and bending the blade.