JPH057810A - Coating method and apparatus using grooved coater roll - Google Patents

Abstract

(57) [Abstract] [Purpose] In a squeeze type coating method using a coater roll in which a plurality of grooves are formed on the peripheral surface of a rubber roll, the grooves 2c of the coater roll 2 are formed in parallel with each other and the grooves 2c of the coater roll 2 are formed. The shaping metal piece 3 having the same-shaped convex blade is fitted into each groove 2c of the coater roll 2 and applied while being pressed. [Effect] As a result, the shape of the rubber roll groove can be secured for a long period of time, and the operating cost can be significantly reduced. In addition, a uniform coating film can be obtained,
It has become possible to improve quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a squeeze type coating method and apparatus using a grooved coater roll.

[0002]

2. Description of the Related Art A squeeze type coater is a type that is often used unless it has a simple structure and a specially beautiful appearance is required. 4 and 5 show an example of the coater of this system. The coating film is controlled by this coater by sandwiching a continuously flowing steel plate 1 with opposing rubber-lined coater rolls 2, and applying a coating liquid 8 supplied to the surface of the steel plate 1 by a spray nozzle 7 provided on the upstream side to a coater roll. It is controlled by the groove 2c formed on the surface of the tool 2 and the pressure applied by the rolling down device 6. 2b is a rubber lining and 2a is an iron core. Also,
Reference numeral 5 denotes a coater roll driving device.

[0003]

The drawbacks of the above-mentioned conventional coaters are that when the roll wears out, the groove shape changes, making it impossible to control the coating film thickness and appearance, resulting in a difference in film thickness in the width direction and between the front and back sides. The problem is that it becomes large and vertical streaks occur. The roll wear rate depends on the coating speed. Generally, if the roll speed is economical, frequent roll replacement is required and the operation load is large.

An object of the present invention is to provide a coating method and apparatus using a grooved coater roll that solves the above-mentioned drawbacks of the prior art.

[0005]

The method of the present invention is a squeeze type coating method using a coater roll in which a plurality of grooves are processed on the peripheral surface of a rubber roll, wherein the grooves of the coater roll are formed in parallel, and the coater roll is formed. Is a coating method using a grooved coater roll, wherein a shaped metal article having a convex strip blade having the same shape as the groove of the groove is matched with each groove of the coater roll, and coating is performed while pressing.

Further, the apparatus of the present invention is a squeeze type coating apparatus using a coater roll having a plurality of grooves formed on the peripheral surface of a rubber roll, wherein the grooves of the coater roll are formed in parallel and the grooves of the coater roll are A grooved coater roll characterized in that a shaping metal article having a convex strip blade of the same shape is provided so as to be able to move in and out of each groove of the coater roll, and a pressing device for pressing the shaping metal article against the coater roll is provided. Preferably, the shaping hardware is divided into a plurality of pieces in the lengthwise direction of the roll cylinder, and each of the divided shaping hardware includes a pressing device that presses the shaping metal on the coater roll. It is a feature.

Although the coating surface of the coater roll of the present invention is made of rubber in the specification, a soft elastic material (polymer material) other than rubber can be used because of its compatibility with paints.

[0008]

In the conventional coating method, the groove shape is destroyed by the abrasion of the rolls, and the coating control becomes impossible, so that the dressing is required regularly. The shape of the groove is broken because a part of the groove is selectively worn away. FIG. 3A shows a new groove in the case where the groove shape is triangular, and FIG. 3B shows a worn groove in comparison. In the case of the triangular groove, the apex corresponding to the outer diameter of the roll is selectively worn away.

Therefore, according to the present invention, a shaped metal article having the same shape as the rubber roll groove is fitted into the rubber roll groove, and is pressed and operated to forcibly abrade a portion of the contour of the rubber roll groove, which wears slowly. The initial shape was maintained. Thereby, the groove shape can be maintained for a long period of time. The forced dressing of the rubber roll groove with the orthopedic metal may be appropriately performed constantly or intermittently.

The cutting powder generated by dressing may be harmful or harmless depending on the form of the cutting powder, the material of the roll, and the type of coating film. That is, when the powder is constantly pressed under a light pressure, the cutting powder becomes fine powder and is dispersed very thinly in the coating film, so that there is often no problem. If even a small amount should not be mixed, dressing is performed intermittently and a trough is provided under the cutting blade to collect all coating liquid containing cutting powder and remove cutting powder.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. 1 is a side view of an embodiment of the apparatus of the present invention, and FIG. 2 is a plan view of the same. In FIGS. 1 and 2, reference numeral 1 is a steel plate which is an object to be coated. 2 is a coater roll, 2a is an iron core, 2b is a rubber lining, 2c is a rubber lining 2b
It is a parallel groove of multiple lines processed into.

Reference numeral 3 is a shaping metal which is made of wear-resistant cemented metal and has the same groove shape as the groove 2c of the rubber roll so that the rubber roll groove 2c can be pressed over the width of the roll. There is. Also in this example,
The shaping metal piece 3 is divided into three parts in the length direction of the roll cylinder so that the metal part can be uniformly pressed down in accordance with the bending of the coater roll 2.

Here, it is important to control the pressing force for pressing the grooved metal piece 3 against the groove 2c of the rubber roll. If the pressing force is too strong, the rubber roll may be deteriorated or cracked due to frictional heat. Further, if the pressing force in the roll cylinder length direction is non-uniform, the abrasion of the rubber roll becomes non-uniform, and it becomes impossible to control the application. In order to prevent this, a shaping metal reduction device 4 is provided. 4a is a reduction motor, 4b is a reduction force detection load cell, and 4c is a guide.

A roll driving device 5 controls the speed of the coater roll 2 in synchronization with the speed of the steel plate 1. 6 is a roll pressing device, 7 is a spray nozzle for supplying a coating liquid, 8
Indicates a coating liquid. The excess coating liquid 8 is received by the liquid receiver 12, returned to the coating liquid tank 13, and circulated by the circulation pump 14. Further, the coating liquid 8 in which cutting wastes are carried over is returned to the coating liquid tank 13 through the receiving filter 10 by the trough 9. 11 shows piping.

Since the frictional heat is cooled by the coating liquid, no cooling device is required. Next, specific examples will be described. In the device of Figures 1 and 2, the diameter is 200mm,
Using an equilateral triangular coater roll 2 with a rubber lining thickness of 20 mm and a groove 2c pitch of 1.0 mm, apply MgO slurry liquid to a steel plate 1 with a plate thickness of 0.2 to 0.5 mm and a plate width of 9001200 mm.
It was applied at ~ 150 m / min. As a result, the roll life was extended to about 3 times that of the conventional one.

[0016]

As described above, according to the present invention, the shape of the rubber roll groove can be secured for a long period of time, and the operating cost can be greatly reduced. In addition, it is possible to obtain a uniform coating film and improve the quality.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a new groove and a worn groove processed on the rubber lining surface of the coater roll.
3A shows a new product, and FIG. 3B shows a worn product.

FIG. 4 is a sectional view of a conventional squeeze type roll coater.

FIG. 5 is a front view of a conventional squeeze type roll coater.

[Explanation of symbols]

1 steel plate 2 coater rolls 2a iron core 2b rubber lining 2c groove 3 Orthopedic hardware 4 Orthogonal hardware reduction device 4a Reduction motor 4b load cell 4c guide 5 drive 6 roll reduction device 7 spray nozzles 8 coating liquid 9 troughs 10 filters 11 piping 12 liquid receiver 13 Coating liquid tank 14 Circulation pump

Claims (3)

[Claims] 1. A squeeze-type coating method using a coater roll in which a plurality of grooves are formed on the peripheral surface of a rubber roll,
It is characterized in that the grooves of the coater roll are formed in parallel, and a shaping metal article having a convex strip blade having the same shape as the groove of the coater roll is matched with each groove of the coater roll, and coating is performed while pressing. Coating method with grooved coater roll. 2. A squeeze type coating apparatus using a coater roll in which a plurality of grooves are formed on the peripheral surface of a rubber roll,
The grooves of the coater roll are formed in parallel, and a shaping metal article having a ridged blade having the same shape as the groove of the coater roll is provided so as to be able to move in and out of each groove of the coater roll, and the shaping metal article is applied to the coater roll. A coating device using a grooved coater roll, which is equipped with a pressing device for pressing. 3. The shaping hardware is divided into a plurality in the longitudinal direction of the roll cylinder, and each of the divided shaping hardware is provided with a pressing device for pressing the shaping hardware against the coater roll. A coating device using the grooved coater roll described in 2.