JPH05309305A - Apparatus for regulating coating film thickness of roll type coating machine - Google Patents

Abstract

PURPOSE:To maintain the pressure of each roll in a coating machine constant by placing a spring between a stopper attached on each pedestal and a needle and regulating the pressure between respective rolls by fixing a driving system to the needle. CONSTITUTION:In an apparatus for regulating coating film thickness of a roll type coating machine having a pickup roll 13, a transfer roll 12, an applicator roll 11 and backup rolls, the applicator roll 11 is placed on the first pedestal 21 freely slidably on a base pedestal, the transfer roll 12 is placed on the second pedestal 22 freely slidably on the first pedestal 21, and the pickup roll 13 is placed on the third pedestal 23 freely slidably on the second pedestal. A stopper 30 is attached on each of pedestals 21-23, a needle 31 which slides on the pedestals 21-23 is installed, a spring 33 is placed between the stopper 30 and the needle 31, and a driving system is fixed to the needle 31. In this way, the pressure between the backup roll and each of rolls 11-13 is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating film thickness adjusting device for a roll type coater machine used for manufacturing equipment such as coated steel sheets.

[0002]

2. Description of the Related Art A roll type coater machine consists of a pickup roll for scraping up the paint in a paint pan, a transfer roll for receiving an appropriate amount of the paint on the pickup roll and transferring it to an applicator roll for coating a strip plate, and an applicator roll. Consists of. Normally, the pickup roll and applicator roll have a rubber lining. Conventionally, the coating film thickness is adjusted by the operator appropriately changing the number of rotations of each roll and the roll interval with respect to the strip moving speed, or the roll bearing disclosed in Japanese Patent Publication No. 62-41077 has a load cell or the like. A method is used in which a measuring device is provided and the position of the bearing is controlled so that the pressing force between the rolls is always constant. The former has large variations and cannot be precisely adjusted, and the latter also has large changes in the pressing force due to changes in the bearing position, and an actuator with extremely high resolution is required to perform delicate control of the pressing force. ..

[0003]

In order to keep the coating film thickness formed on the strip plate constant, it is necessary to keep the pressing force of each roll constant. The pressing force changes due to changes in surface elasticity and changes in outer shape due to swelling of the rubber lining. The present invention uses a spring, and by appropriately selecting the spring constant, the influence of disturbance such as a change in roll diameter can be reduced, and the pressing force can be kept substantially constant. A film thickness adjusting device is provided.

[0004]

The present invention provides a coating film thickness adjusting device (including a two-roll coater without a transfer roll) for a roll type coater machine having a pickup roll, a transfer roll, an applicator roll and a backup roll. The applicator roll is placed on the first bearing stand and slidably provided on the base pedestal, the transfer roll is placed on the second bearing stand and slidably provided on the first bearing stand, and the pickup roll is provided. It is placed on the third bearing stand and slidably provided on the second bearing stand, a stopper is provided upright on each bearing stand, and a mover that slides on the bearing stand is provided side by side to provide a stopper and a mover. A coating film thickness adjusting device for a roll-type coater machine, characterized in that a spring is interposed between the rollers and a drive system is provided on the mover to adjust the pressing force between the rolls. It is intended to dispose the Riniyageji the spring parallel to the interposed between the stopper and the movable element.

The present invention will be described in detail below with reference to the drawings. Figure 1
FIG. 3 is a side view of the present invention. In the drawing, 10: backup roll, 11: applicator roll, 12: transfer roll, 13: pickup roll are shown, and a part of the pickup roll 13 is immersed in a paint pan (not shown). A rubber lining is applied to the pickup roll 13 and the applicator roll 11, and a strip plate is introduced between the backup roll 10 and the applicator roll 11 for coating.

The applicator roll 11 has a first bearing base 21.
The first bearing base 21 is slidable on the base pedestal 20. The transfer roll 12 has a second bearing stand 22.
Mounted on the first bearing stand 21 and slidable on the first bearing stand 21, and the pickup roll 13 is placed on the third bearing stand 23 and slidable on the second bearing stand 22. A stopper 30 is erected on the third bearing stand 23, a mover 31 that slides on the third bearing stand 23 is provided side by side, a spring 33 is interposed between the stopper 30 and the mover 31, and the spring 33 bends. I am receiving power. The mover 31 is engaged with the stepping motor 34 by a shaft 37, and the rotating force of the stepping motor 34 enables the mover 31 to move horizontally by the screw 35. 36 is a bearing. Besides, the mover 31 may be horizontally moved by a simple actuator such as a hydraulic cylinder. 2 is a plan view of FIG. 1, FIG. 3 is a front view, and 50 is a view taken along the line AA of FIG.

In the present invention, a vibration preventing damper (dashpot) 39 for absorbing harmful vibrations in control due to the rotation of each roll is provided in parallel with the spring 33. Further, a linear gauge 38 is provided on the spring 33 in order to control the roll pressing force by measuring the bending amount of the spring 33 (FIG. 2). Therefore, proper control is possible by changing the spring constant of the spring.

Although the stopper 30 and the mover 31 provided on the bearing base 23 of the pickup roll 13 are mainly described above, in the present invention, the applicator roll 11 is used.
A mover having a stepping motor is provided on each bearing stand of the transfer roll 12 and the transfer roll 12, and a spring is interposed between the mover and the stopper. Therefore, each roll receives a pressing force due to the bending force of the spring.

According to the experiment, the pressing force and the deflection in the roll type coater machine have a close relationship, and this correlation is shown in FIG.
Shown in. In the figure, 1 is a characteristic curve of a spring in the present invention, 2 is a characteristic of a measuring instrument (such as a load cell) provided in a conventional bearing, and 3 is a bending (concave) to resistance curve of a rubber lining. That is, by making the spring constant of the spring as small as possible, the deflection δ ₁ with respect to the pressing force P can be made large, and the pressing force can be easily controlled.

Even if the pressing force of each roll fluctuates due to a change in the surface elasticity of the rubber lining or a change in the outer shape due to the swelling of the rubber lining with the passage of time, the pressing force of the spring is flexed by the spring interposed between the stopper and the mover. Can absorb fluctuations. Also, for a large fluctuation amount that cannot be absorbed by the bending of the spring, the optimum set value can be reproduced by the stepping motor, but at this time, the value of the linear gauge can be used. Therefore, in the present invention, the pressing force of each roll can always be maintained within a fixed range without using a complicated arithmetic unit or automatic control device for controlling the pressing force.

[0011]

According to the present invention, since each roll receives a pressing force due to the bending of the spring separately, the optimum value of the coating film thickness by the applicator roll is previously obtained by an experiment,
By reading the deflection of the spring of this value with the linear gauge, it is possible to always keep the pressing force of each roll of the coater machine constant.

[Brief description of drawings]

FIG. 1 is a side view of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view including a partial cross section.

FIG. 4 is a chart of pressing force and deflection.

[Explanation of symbols]

 10 Backup Roll 11 Applicator Roll 12 Transfer Roll 13 Pickup Roll 21 First Bearing Stand 22 Second Bearing Stand 23 Third Bearing Stand 30 Stopper 31 Mover 33 Spring

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasunori Tsuda 2-1 Tsurumachi, Hirohata-ku, Himeji-shi, Hyogo Taihei Kogyo Co., Ltd. Hirohata Branch

Claims (2)

[Claims] 1. A coating film thickness adjusting device for a roll type coater machine having a pickup roll, a transfer roll, an applicator roll and a backup roll,
The applicator roll is placed on the first bearing stand and slidably provided on the base pedestal, the transfer roll is placed on the second bearing stand and slidably provided on the first bearing stand, and the pickup roll is provided. It is placed on the third bearing stand and slidably provided on the second bearing stand, a stopper is provided upright on each bearing stand, and a mover that slides on the bearing stand is provided side by side to provide a stopper and a mover. A coating film thickness adjusting device for a roll coater machine, characterized in that a spring is interposed between the rollers and a drive system is provided on the mover to adjust the pressing force between the rolls. 2. The coating film thickness adjusting device for a roll type coater machine according to claim 1, wherein a linear gauge is arranged in parallel with a spring interposed between the stopper and the mover.