JP2526669Y2 - Paint curtain pan structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a paint curtain coater.
The present invention relates to a structure of a paint curtain receiving pan in a coating apparatus.

[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,
It is discharged 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. In the overflow method, properties such as surface tension and viscosity of the paint are changed while diluting the paint with a solvent. The coating material adjusted to an appropriate coating viscosity in this way is overflowed from the container into 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 based on a roller system has been developed. In this roller system, a paint whose viscosity has been adjusted in advance is coated with a painted rubber roll and a metal doctor roll. Is supplied to and discharged from the roll gap, and is scraped off by a blade in contact with the coated rubber roll. The scraped paint flows down along the blade to form a paint curtain, which is applied to a steel plate or the like passing below the blade. FIG. 4 shows a conventional roller curtain coating apparatus. In the roll curtain coating apparatus shown in FIG. 4, the paint stored between the paint roll 1a and the doctor roll 1b is rotated by the rotation of the paint roll 1a. The paint is discharged downward along the surface of the coating roll 1a from the gap between the doctor roll 1a and the doctor roll 1b. Reference numeral 3 denotes a blade arranged in the axial direction of the coating roll 1a, which scrapes paint 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.
The roller coater has a coating film having a desired thickness by adjusting the rotation speed of the coating roll 1a and the gap between the coating roll 1a and the doctor roll 1b. -Ten 6
Is obtained. As described above, the curtain coating device is constituted by a device that performs coating by freely dropping the paint curtain 6 from above the steel plate as the object 4 to be moved. On the other hand, since the width of the paint curtain 6 needs to be maintained, the side chain 5 is provided so as to extend along the inner bottom surface of the paint tank 2 and a downflow guide (not shown) so as to extend downward. The width is adjusted.

[0005]

Under the above-mentioned structure, the object to be coated with a roller cursor is conventionally known.
For example, at the start of painting on a steel plate, the intermediate pan installed between the blade and the steel plate is pulled out to start painting on the steel plate, but in the conventional intermediate pan structure, this occurs at the time of drawing. Due to the sway of the curtain, a thick film portion occurs at the start of the coating of the steel sheet. The thick film portion generates an unfired portion, which causes dust, bumps and rolls to be scratched. In addition, paint dripping from the intermediate pan occurred, impairing the appearance of the paint film. Regarding these problems, the present invention makes it possible to stably cut the paint curtain from the roller curtain by improving the structure of the paint curtain receiving pan, and the paint curtain drips when cut. An object of the present invention is to provide a paint curtain receiving pan structure for receiving paint and preventing the paint from being entrained on both sides of the intermediate pan.

[0006]

Means for Solving the Problems Accordingly, the present inventors have made extensive efforts to solve the problems of the prior art and to improve the paint curtain receiving pan structure in order to achieve the above object. , obtained by solving the problem, and the gist of the invention, the curtain coater to form a coating film on the object to be coated is passed through the paint curtain (1) under a stream of paint curtain <br / > together constitute a smooth circular inclined shape color curtain cut portion shape in the middle pan tip of paint curtain receiving pan and blocking stream of emissions, that were provided with coating material receiving device at the bottom of the middle pan tip Characterized paint curtain receiving pan structure. (2) The paint curtain receiving pan structure according to (1 ), wherein cutouts are formed on both sides of the front end of the intermediate pan. Will be described.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall schematic view showing a coating curtain receiving pan of a roller curtain coating apparatus according to the present invention. In FIG. 1, the paint stored between the paint roll 1a and the doctor roll 1b is removed from the gap between the paint roll 1a and the doctor roll 1b by the rotation of the paint roll 1a. Painting row
The ink is discharged downward along the surface 1a. In this case, the paint is scraped off from the surface of the coating roll 1a by a blade 3 arranged in the axial direction of the coating roll 1a.
A paint curtain 6 is formed. The remaining paint scraped off by the blade 3 is stored in a paint tank (not shown) provided below. This roller cursor
The adjuster adjusts the rotation speed of the coating roll 1a and the gap between the coating roll 1a and the doctor roll 1b.
A paint curtain 6 having a desired film thickness is obtained. As described above, the curtain coating apparatus performs coating by freely dropping the paint curtain from above the steel plate, which is the object 4 to be moved.

[0008]

[Effect] In this case, at the time of coating the start of the steel sheet in a roll curtain coater and pull the intermediate pan 7 which are placed between the blade 3 and the steel plate 4, but is intended to start painting the steel sheet However, in the structure of the conventional intermediate pan, a thick film portion is generated at a steel plate painting start portion due to a curtain swing occurring at the time of drawing. In order to solve this problem, in the present invention, as shown in FIG. 2, the tip shape of the intermediate pan 7 is variously changed. That is, FIG. 2 is Ri sectional view showing the structure of the intermediate pan according to the present invention, a color curtain cutting unit synovial
It shows a structure with a clear circular inclined shape, stably
The paint curtain cutting section for cutting the paint curtain
A <90 ° is good, but paint curtain
Considers dripping after cutting and occurrence of thick film due to double coating
It has a smooth circular inclined shape. This structure
Enables stable cutting of paint curtain at the tip
No need for double coating and no dropping
No results are obtained. Also, paint after cutting the paint curtain
Because the drop is a smooth circular inclined shape,
It flows smoothly along this slope and accumulates in the paint receiving device 11.
Round.

FIG . 3 is a perspective view of the intermediate pan according to the present invention in which a notch is provided at the bottom of the tip. As shown in FIG. 3, the paint curtain cutting portion 10 at the tip of the intermediate pan 7 is formed at an obtuse angle or
As shown in FIG. 2 , the intermediate pan 7 has a circular inclined shape.
By providing the notch 8 at the bottom of the tip of the paint, the paint is discharged in the direction of the arrow 9 to the paint receiving device 11 provided below the intermediate pan 7, so that the paint can be prevented from being involved. That is, when the intermediate pan is drawn in the line advancing direction or the reverse direction at the same time as the start of painting, the paint curtain is cut and the paint adhering to the tip of the intermediate pan flows along the slope of the paint curtain cutting part. It is discharged from the notch at the bottom of the pan tip, and the entrainment of paint can be prevented.

[0010]

[Effects of the Invention] As described above, the paint curtain receiving pan structure of the present invention enables the paint curtain from the roller curtain to be cut very stably when passing through the curtain, and receives paint that drips when cut. In addition, it is possible to prevent the paint from being entangled on both sides in the width direction, thereby providing an industrially highly effective device that can completely eliminate the defective coating portion at the coating start portion. It is in.

FIG. 2 (C) shows a structure in which the cut portion of the paint curtain is formed into a smooth circular inclined shape. The cut portion of the paint curtain for stably cutting the paint curtain is cut. Considering only the above, a <90 ° is good, but the paint curtain is formed into a smooth circular inclined shape in consideration of dripping after cutting and generation of a thick film due to double coating. In other words, FIG. 2C shows a configuration in which both FIG. 2A and FIG. 2B are in harmony. Therefore, in FIG. 2 (C), stable cutting can be performed on the paint curtain at the front end, and a result is obtained in which no double coating occurs and no dropping occurs. In addition, since the paint dripping after cutting the paint curtain has a smooth circular inclined shape, it flows smoothly along this inclination and accumulates in the paint receiving device 11.

FIG. 3 is a perspective view of the intermediate bread according to the present invention, in which a cutout portion is provided at the bottom of the tip. As shown in FIG. 3, the paint curtain cutting section 10 at the tip of the intermediate pan 7 is shown in FIG.
As shown in FIG. 2 (B), an obtuse angle or a circular inclined shape as shown in FIG. The paint is discharged to the device 11 in the direction of arrow 9 so that the paint can be prevented from being entrained. That is,
At the same time as the start of painting, the intermediate pan is pulled out in the line advancing direction or the reverse direction to cut the paint curtain and at the same time paint adhering to the tip of the intermediate pan flows along the slope of the paint curtain cutting part, and the paint is entrained Is discharged from the notch at the bottom of the intermediate pan tip, and the paint can be prevented from being involved.

[0013]

As described above, the paint curtain receiving pan structure of the present invention makes it possible to form the paint curtain from the roller curtain.
It is possible to cut the marten very stably when passing through the carten, and it is possible to receive the paint that drips when it is cut, and furthermore, it is possible to prevent the paint on both sides in the width direction from being involved, An object of the present invention is to provide an industrially highly effective device capable of completely eliminating a defective coating portion at a coating start portion.

[Brief description of the drawings]

[1] paint <br/> curtain received overall schematic diagram showing a pan roller curtain coating apparatus according to the present invention,

2 is a cross-sectional view showing a paint curtain receiving pan according to the present invention,

Perspective view of the paint curtain receiving pan structure showing another embodiment according to Figure 3 the present invention,

FIG. 4 is an overall schematic view showing a conventional roller curtain coating apparatus.

[Explanation of symbols]

1a paint roll, 1b doctor roll, 2 painting tanks, 3 blade, 4 object to be coated, 5 sidechain, 6 paint curtain, 7 intermediate pan, 8 notch,
9 paint discharge arrow, 10 paint curtain cutting part, 11
Paint receiver.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masanori Omori 1 Kimitsu, Kimitsu City, Chiba Pref.

Claims (2)

(57) [Scope of request for utility model registration] 1. A by passing through a paint curtain flowing down in a curtain coater to form a coating film on the object to be coated, the coating
Together constitute a fee smooth circular inclined shape intermediate pan tip color curtain cutting portion shape of the paint curtain receiving pan the falling and blocking the curtain, that were provided with coating material receiving device at the bottom of the middle pan tip Characterized paint curtain receiving pan structure. 2. A color curtains receiving pan structure according to claim 1, wherein the forming the notch on both sides of the middle pan tip.