JP2001340792A - Roller coater and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coater and a coating method in which the controllability of the coating rate of a coating solution is improved and the fluctuation is reduced. SOLUTION: In the roller coater provided with a pair of squeeze rollers 2-1 and 2-2 for applying a coating solution provided with a traveling metallic strip 1 in between and lined with rubber, ball-screw jacks 5-1 and 5-2 for adjusting the draft of the one squeeze roller 2-1, servo-motors 6-1 and 6-2 for driving the jacks 5-1 and 5-2 and means 7-1 and 7-2 for measuring the distance between the rollers 2-1 and 2-2 are provided. When the coating solution is applied by the coater, the distance between the rollers 2-1 and 2-2 is controlled so that the coating weight of the dried coating solution is kept constant in accordance with the width, thickness and traveling speed of the strip and concentration of the coating solution or further with the shape of the groove on the roller surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for applying a coating liquid to the surface of a traveling metal strip using a squeeze roll.

[0002]

2. Description of the Related Art A metal strip such as a steel sheet is subjected to a chemical conversion treatment to improve performance such as corrosion resistance. As an inexpensive and highly efficient chemical conversion treatment method, there is a method of applying a chemical conversion treatment solution using a squeeze roll. In this method, after a coating liquid (chemical conversion treatment liquid) is excessively supplied onto a traveling metal band or a squeeze roll, the coating liquid is squeezed by a pair of squeeze rolls pressed with a predetermined load while rotating. Adjust the coating liquid adhesion amount on the plate surface. The roll rotation direction is the same as or opposite to the running direction of the metal plate.
There are types.

In the above-described apparatus, a pair of left and right roll chocks rotatably supporting a squeeze roll are housed in a chock guide portion of a roll stand. The control of the amount of the coating liquid to be squeezed by the squeeze roll is performed by controlling the pressing force of the roll chock with a fluid pressure cylinder, sliding the roll chock on the sliding surface of the chock guide, and controlling the pressing load (rolling force) of the squeeze roll. It is done.

[0004] If the amount of the coating liquid adhered after being squeezed by the squeeze roll fluctuates, the variation in the corrosion resistance and other qualities increases. Therefore, it is preferable that the fluctuation in the amount of the applied liquid be reduced as much as possible.

Japanese Patent Application Laid-Open No. Hei 9-256166 discloses a hydraulic cylinder having a mechanism for adjusting the rolling force of a squeeze roll. It is described that the rolling force is controlled by feedback to make the amount of adhesion uniform.

[0006]

However, in the above method,
Even if the pressure of the fluid pressure cylinder is controlled, the amount of coating liquid adhered cannot be accurately controlled, so that the effect of reducing the variation in the amount of applied liquid is small. An object of the present invention is to provide a coating apparatus and a coating method capable of improving the controllability of the coating liquid adhesion amount and reducing the fluctuation of the adhesion amount in consideration of the above problem.

[0007]

Means for affecting the amount of coating liquid adhered after being squeezed by the squeeze roll is a difference obtained by subtracting the frictional force of the sliding surface of the roll chock from the pressure of the fluid pressure cylinder. When trying to directly control the pressing load of the roll, the frictional force of the sliding surface of the roll chock cannot be ignored. That is, even if the pressure of the fluid pressure cylinder is controlled,
Due to the static frictional force of the sliding surface of the roll chock, a small change in pressure is not reflected in a change in the pressing load of the roll, and as a result, is not reflected in a change in the coating liquid adhesion amount. Also, since the frictional force acting on the sliding surface of the roll chock changes every moment due to fluctuations in the running speed of the metal band and surrounding vibrations, the difference between the pressing force of the fluid pressure cylinder, that is, the roll The pressing load also changes every moment, and the coating liquid adhesion amount is not stable.

When the distance between the rolls of the squeeze rolls is directly controlled, the instability of the roll pressing load caused by the frictional force or vibration of the roll chock sliding surface caused by controlling the pressure of the fluid pressure cylinder is considered. It is possible to stably obtain a uniform adhesion amount by removing it. The present invention is based on this idea, and the means are as follows.

(1) It is arranged with a traveling metal band interposed therebetween,
In a roll coating apparatus having a pair of squeeze rolls for coating a coating liquid with a rubber lining, a ball screw jack for adjusting a reduction amount of one of the squeeze rolls, a servomotor for driving the ball screw jack, And a means for measuring the distance between the squeeze rolls.

(2) The means for measuring the distance between a pair of squeeze rolls, wherein a PLG (pulse generator) connected to a ball screw jack is provided. Roll coating device (2nd
invention).

(3) The roll coating apparatus according to the above (1) or (2), wherein the rubber-lined squeeze roll has a V-shaped groove having a pitch of 0.2 to 3 mm on the surface. (Third invention).

(4) The roll coating apparatus has an on-line coating amount meter downstream of the coating section, and controls the distance between the pair of squeeze rolls based on the coating liquid adhesion amount detected by the coating amount meter. The roll coating apparatus according to any one of the above (1) to (3), further comprising a control device arranged so as to be able to be disposed (fourth invention).

(5) In applying the coating liquid using the roll coating apparatus according to any one of (1) to (3),
Depending on the width of the metal band, the thickness of the metal band, the traveling speed of the metal band, the concentration of the coating liquid, or the groove shape of the surface of the squeeze roll, the amount of adhesion after drying the coating liquid is constant, A method for applying a coating liquid, wherein a distance between squeeze rolls is provided (fifth invention).

(6) In applying the coating liquid using the roll coating apparatus according to the above (4), the width of the metal band, the thickness of the metal band, the traveling speed of the metal band, the concentration of the coating liquid, or further. In accordance with the groove shape of the squeeze roll surface, the distance between the pair of squeeze rolls is given so that the adhesion amount after drying the coating liquid is constant, and based on the adhesion amount of the coating liquid measured by the online adhesion meter. And a feedback control for correcting the distance between the rolls provided according to the deviation between the measured adhesion amount and the target adhesion amount (a sixth invention).

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an example of a roll coating apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic view of an apparatus for adjusting a distance between a pair of squeeze rolls provided in the roll coating apparatus of FIG. FIG. 3 is an axial cross-sectional view of the roll explaining the groove shape of the rubber lining provided on the surface of the squeeze roll provided in the roll coating apparatus of FIG.

In FIG. 1, reference numeral 1 denotes a metal band;
2 is a pair of squeeze rolls, 4 is a roll chock, 6 is a servomotor, and 8 is a roll distance control device. As shown in FIG. 2, the roll chock 4 has one set on each of the left and right sides of one squeeze roll 2-1 and the other squeeze roll 2-2, that is, 4-1 and 4-2, and 4-3 and 4 -4 is provided, and the servo motor 6 is
The left and right sides of one squeeze roll 2-1 are 6-1 and 6-
2 are provided. Also, in FIG.
-2 is a ball screw jack, 7-1 and 7-2 are P
LG (pulse generator).

In the coating apparatus, the roll chocks 4-1 and 4-2 of one of the squeeze rolls 2-1 are respectively provided.
The ball screw jacks 5-1 and 5-2 are connected, servo motors 6-1 and 6-2 for driving the ball screw jacks 5-1 and 5-2, and the ball screw jack 5-1. , 7-2 for converting the rotation speeds of the squeeze rolls 2-1 and 2-2 into roll-to-roll distances are provided.

The inter-roll distance control device 8 instructs the servo motors 6-1 and 6-2 and the PLGs 7-1 and 7-2,
The distance between the squeeze rolls 2-1 and 2-2 can be adjusted to a predetermined distance by driving the ball screw jacks 5-1 and 5-2.

If a commonly used screw jack is used as the inter-roll distance adjusting mechanism, a highly accurate inter-roll distance cannot be obtained due to backlash. In the present apparatus, since the ball screw jacks 5-1 and 5-2 are used as the inter-roll distance adjusting mechanism, backlash is eliminated and a highly accurate inter-roll distance can be obtained. Furthermore,
In this apparatus, since the servo motors 6-1 and 6-2 are used, the response speed to the command from the inter-roll distance control device 8 is fast, so that the inter-roll distance can be changed quickly, and the amount of adhesion change Can be further improved.

The squeeze rolls 2-1 and 2-2 are provided with a rubber lining, and w = 0.2-3
It has a V-shaped groove with a mm pitch (FIG. 3). When the coating liquid is applied, the distance between the two rolls is usually negative, and the lining rubber is deformed, and the two parts are in contact with each other at a portion outside the end of the metal strip 1. Therefore, the distance between the two rolls cannot be actually measured by a distance sensor or the like. Measurement of the distance between rolls was performed using PLG7-1 and PLG7-1.
By using -2, the distance between the rolls can be accurately measured even in the above state.

The grooves having a pitch of w = 0.2 to 3 mm are provided on the surfaces of the rubber linings of the squeeze rolls 2-1 and 2-2 when the coating liquid is applied. This is because clogging is likely to occur, and if it exceeds 3 mm, the thickness of the coating film becomes too thick. In order to prevent clogging of the coating liquid and obtain a required coating film thickness, the depth d of the groove is 0.05 to 1.
5 mm is preferred.

The shape of the groove provided on the rubber lining surface of the squeeze roll is not limited to the V-shape, but may be any suitable shape such as a rectangular shape or a trapezoidal shape, if necessary. .

With the above configuration, the distance between the squeeze rolls can be accurately detected, and the required distance between the rolls can be quickly and accurately controlled.

FIG. 4 is a schematic view showing an example of another roll coating apparatus according to the embodiment of the present invention. In the apparatus shown in FIG. 4, the coating section (squeeze roll 2) of the roll coating apparatus shown in FIG.
−1, 2-2), a coating amount meter 9 is further provided downstream of the squeeze rolls 2-1 and 2-2 based on the coating liquid adhesion amount detected by the coating amount meter 9. The apparatus includes a roll-to-roll distance control device 10 arranged so that the distance can be feedback-controlled. As the adhesion meter 9, a known adhesion meter such as a fluorescent X-ray analyzer is used.

In the present apparatus, based on the amount of coating liquid adhering detected by the adhering amount meter 9, feedback control for correcting the distance between the squeeze rolls 2-1 and 2-2 is performed, so that the fluctuation of the adhering amount is reduced. It can be further reduced.

In the above-described apparatus, the coating liquid excessively supplied to the surface of the metal strip 1 is squeezed by a pair of squeeze rolls 2-1 and 2-2 sandwiching the traveling metal strip 1 to apply the coating liquid. . An example of a method for applying a coating liquid will be described with reference to FIG.

In FIG. 5, squeeze rolls 2-1 and 2-2 are shown.
Are rotating in a direction coinciding with the traveling direction of the metal strip 1.
The coating liquid 3 supplied to the squeeze roll 2-1 via the coating liquid supply header 11 is supplied to the upper surface of the metal strip 1, and the lower part of the squeeze roll 2 is immersed in the coating liquid 3 in the coating liquid pan 12. The coating liquid 3 pumped by 2 is supplied to the lower surface of the metal strip 1. The supplied coating liquid 3 can control the coating liquid adhesion amount with high precision by controlling the distance between the squeeze rolls by the following two methods using the squeeze roll distance adjustment mechanism described above. It becomes possible.

(1) The relationship between the coating liquid adhesion amount and the width, thickness, running speed, coating liquid concentration, groove shape of the surface of the squeeze roll, and the distance between the pair of squeeze rolls is finite. It can be obtained by analysis by the element method or by matching with actual machine data. Metal strip width,
If the thickness, the traveling speed, the coating liquid concentration, and the groove shape of the squeeze roll surface are known, the necessary squeeze roll distance for the target coating liquid adhesion amount can be obtained based on the relationship obtained above. . Therefore, these relations are obtained in advance as, for example, a model formula, and the relations are input to the inter-roll distance control device 8, and the inter-roll distance control device
In accordance with the thickness of the metal strip, the running speed, the coating solution concentration, and the groove shape of the surface of the squeeze roll, the required inter-roll distance of the squeeze roll is obtained.
1, 6-2 and PLG 7-1, 7-2, and by driving the ball screw jacks 5-1 and 5-2,
The distance between the squeeze rolls 2-1 and 2-2 is controlled.

(2) Further, the coating liquid adhesion amount determined in (1) above, the width, thickness, running speed, coating liquid concentration, coating liquid surface groove shape of the squeeze roll, and the distance between the squeeze rolls When the distance between the squeeze rolls is changed based on the relationship with the distance, the relationship between the amount of change in the distance between the squeeze rolls and the amount of change in the coating liquid adhesion amount can also be obtained.

Therefore, the relationship obtained in the above (1) is input to the inter-roll distance control device 10. Further, the inter-roll distance control device 10 can calculate the correction amount of the inter-roll distance of the squeeze rolls required to reduce (zero) the deviation according to the deviation between the measured adhesion amount and the target adhesion amount. It is arranged.

Then, similarly to the above (1), the necessary distance of the squeeze roll is controlled by the inter-roll distance control device 10 in accordance with the width, thickness, running speed, coating liquid concentration, and groove shape of the squeeze roll surface of the metal strip. The distance between the rolls is obtained, and the obtained value is commanded to the servo motors 6-1 and 6-2 and the PLGs 7-1 and 7-2, and the ball screw jacks 5-1 and 5-2 are driven, whereby the squeeze roll 2 The distance between the rolls -1 and 2-2 is controlled.

Further, squeeze rolls 2-1 and 2-2
On the basis of the deviation between the coating liquid adhesion amount measured by the adhesion amount meter 9 provided on the downstream side of the (coating unit) and the target coating liquid adhesion amount, the roll-to-roll distance control device 10 reduces the deviation ( The amount of correction of the inter-roll distance of the squeeze roll required to make it zero), the inter-roll distance after correction is further obtained, and the obtained inter-roll distance after correction is calculated by the servo motor 6-.
1, 6-2 and PLG 7-1, 7-2, and by driving the ball screw jacks 5-1 and 5-2,
The distance between the squeeze rolls 2-1 and 2-2 is feedback-controlled. In this method, quick feedback control is possible, so that the fluctuation of the coating liquid adhesion amount can be further reduced.

In the above description, the running direction of the metal band is the horizontal direction, but the running direction of the metal band is not particularly limited in the present invention. You may be running vertically or in other directions. Also, the method of supplying the coating liquid to the metal strip is not particularly limited. For example, the coating liquid may be supplied directly to the surface of the metal strip, or when traveling in the vertical direction, the metal strip may be immersed in the coating liquid. In the above description, the direction of rotation of the squeeze roll is the direction (forward direction) that matches the direction of travel of the metal band, but the direction of rotation of the squeeze roll may be the direction opposite to the direction of travel of the metal band. In the case of the forward direction, the circumferential speed may be different from the running speed of the steel strip (a speed slightly higher or lower than the running speed).

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention was applied to a squeeze roll having a length of 2000 m using the coating apparatus shown in FIGS.
m, outer diameter (diameter) 300 mm, rubber lining thickness 20
mm, pitch w of the groove (V type) engraved on the surface of the rubber lining w = 0.55 mm, groove depth d = 0.11 mm,
A roll having a rubber hardness of JIS-A 70 ° is provided, and the sheet thickness is set to 0.
A coating solution containing a water-soluble resin having a viscosity of 8 cps on a steel plate having a thickness of 5 to 1.6 mm and a width of 600 to 1200 mm (resin concentration: 18
%) Was applied. Specifically, as shown in FIG. 5, excess coating liquid was supplied to the upstream side of the squeeze roll, and the liquid was applied while being squeezed by the squeeze roll. The direction of rotation of the squeeze roll was the same as the direction in which the steel sheet passed, and the peripheral speed was the same as the running speed of the steel sheet.

Using the above-described apparatus, the traveling speed of the steel sheet is kept constant, and the roll chock 4-
Fix the position of 3, 4-4, squeeze roll chock 4
-1 and 4-2 are moved to the squeeze roll 2-
The distance between the rolls 1 and 2 was variously changed, and the adhesion amount (resin adhesion amount) after the coating liquid was dried was measured. The distance between the rolls is defined as a reference position (distance between the rolls = 0 mm) where the peripheral surfaces of the squeeze rolls 2-1 and 2-2 are in contact with each other, and the distance of the squeeze roll 2-1 moved from the reference position is represented by PL.
It was determined by measuring with G. Measured value is squeeze roll 2-1
+ (Plus) when is moved away from the squeeze roll 2-2, and-
(Minus). FIG. 6 shows the measurement results. Since the amount of adhesion is determined by the relative relationship between the distance between the rolls and the plate thickness,
The horizontal axis indicates the distance between the rolls-the sheet thickness, and the vertical axis indicates the amount of the resin adhered. Even if the sheet thicknesses are different, an extremely good correlation is recognized between the distance between the rolls-the sheet thickness and the amount of the adhered resin.

As a comparative example, using the apparatus shown in FIG.
The same squeeze rolls 2-1 and 2-2 as those of the present invention are disposed, and the roll chock 4 of the squeeze roll 2-1 is pressurized by an air cylinder 13 and the amount of adhesion is controlled by the applied pressure. The relationship between the pressing force and the amount of adhesion was investigated.
The same coating liquid as that of the present invention was used. FIG. 8 shows the result of the investigation. Even if the pressure of the air cylinder 13 is changed, little change in the amount of adhesion is observed, and the variation in the amount of adhesion is large. It is difficult to control the amount of adhesion with the pressure of the air cylinder 13 and the variation in the amount of adhesion is reduced. It is clear that the effect of doing so is small.

From FIGS. 6 and 8, when the amount of adhesion is adjusted based on the distance between the squeeze rolls and the thickness of the metal strip using the coating apparatus shown in FIGS. Can be improved. However, in the actual machine, the traveling speed of the metal band is not constant, and the distance between the rolls−
Even when the thickness of the metal strip is constant, the amount of adhesion varies somewhat when the metal strip dimensions are different. Therefore, it is desirable to be able to control the amount of adhesion with higher accuracy even when the above conditions are changed.

The relationship between the distance between the squeeze rolls, the width and thickness of the metal strip, the running speed and the amount of adhesion can be expressed by the following equation (1). d = A ₁ + A ₂ (Cw / NV) + A ₃ t + A ₄ W + A ₅ V + A ₆ (1) where, d: distance between squeeze rolls (mm) Cw: adhesion amount (g / m ² ) NV: coating Liquid concentration (%) t: thickness of metal band (mm) W: width of metal band (mm) V: running speed of metal band (mpm) A _{1 to} A ₆ : coefficient

The direction in which the squeeze rolls approach each other is the-(minus) direction. A ₆ is a coefficient determined by the surface shape of the squeeze roll. In the case of a V-shaped groove, when the groove depth is R (μm), A ₆ = A ₇ R (however, A ₇
Is a coefficient). Therefore, when a squeeze roll having a V-shaped groove is used, Expression (1) is expressed by Expression (2). d = A ₁ + A ₂ (Cw / NV) + A ₃ t + A ₄ W + A ₅ V + A ₇ R (2)

Using the V-shaped groove squeeze roll in the coating apparatus of FIG. 1, the thickness is 0.5 to 1.6 at various running speeds.
mm, a coating liquid containing the water-soluble resin was applied to a metal band having a width of 600 to 1200 mm, the relationship between the distance d between squeeze rolls and the amount of adhesion Cw was investigated, and the respective coefficients of the formula (2) were determined. , A ₁ = −1.158, A ₂ = 2.295 ×
10 ¹ , A ₃ = 8.806 × 10 ⁻¹ , A ₄ = −1.806
× 10 ⁻⁴ , A ₅ = −5.435 × 10 ⁻³ , A ₇ = −3.1
It was 37 × 10 ^-2 .

FIG. 9 is a graph showing the calculated adhesion amount obtained by applying the coating liquid under various conditions using the coating apparatus shown in FIGS. It is a figure which shows the relationship between an actual value and an adhesion amount. From FIG. 9, it can be seen that the deviation between the calculated adhesion amount and the actual adhesion amount is extremely small.

From the equation (2), the dimensions of the metal strip (thickness,
The distance between the squeeze rolls required to obtain a required amount of adhesion can be determined in accordance with the width), the traveling speed, the coating solution concentration, and the groove shape of the squeeze rolls. When there is a deviation ΔCw between the measured value of the adhesion amount and the target value, the correction amount Δd of the inter-roll distance of the squeeze rolls required to reduce the deviation to zero can be obtained from Expression (3). Δd = A ₂ (ΔCw / NV) (3)

Therefore, in the apparatus shown in FIGS. 1 to 3, the relation of equation (2) is input to the inter-roll distance control device 8, and the metal band dimensions (thickness, width), running speed, coating liquid concentration, squeeze According to the groove shape of the roll, a required inter-roll distance of the squeeze roll required to obtain a required target adhesion amount is obtained. The obtained distance between rolls is determined by the servo motors 6-1 and 6
-2 and PLGs 7-1 and 7-2 to drive the ball screw jacks 5-1 and 5-2 and set the distance between the squeeze rolls 2-1 and 2-2 to the distance obtained above. Apply the coating liquid. As a result, the actual adhesion amount can be made closer to the target adhesion amount, and the variation in the adhesion amount can be reduced.

In the apparatus shown in FIG. 4, the relation of the equation (2) is input to the inter-roll distance control apparatus 10, and the required squeeze required for obtaining the required target amount of adhesion is obtained in the same manner as described above. The distance between the rolls is determined, the distance between the squeeze rolls 2-1 and 2-2 is set to the distance determined above, and the coating liquid is applied. The actual adhesion amount is measured by the adhesion amount meter 9, the deviation ΔCw between the target adhesion amount and the actual adhesion amount is obtained by the inter-roll distance control device 10, and the squeeze required to reduce the deviation ΔCw to zero from Expression (3). Correction amount Δd of distance between rolls
And the corrected distance between the rolls is
1, 6-2 and the PLGs 7-1, 7-2, drive the ball screw jacks 5-1 and 5-2, and determine the distance between the squeeze rolls 2-1 and 2-2 as described above. To perform feedback control. By applying the coating liquid in this manner, the variation in the amount of adhesion can be further reduced.

When a coating liquid of a different kind is applied or when a squeeze roll having a different groove shape is used, the equation (2) is applied accordingly (when the surface shape of the squeeze roll is constant, the equation (1)) Is determined, and the variation in the amount of adhesion can be reduced by performing the same method as described above using the equation in which the coefficient is determined.

[0046]

According to the present invention, a target adhesion amount can be obtained with high accuracy. As a result, not only the variation in the quality performance of each product is reduced, but also the coating liquid which has been excessively applied in order to satisfy the quality requirements in the past can be controlled to the required lower limit, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an example of a roll coating apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a main part of a mechanism for adjusting a distance between rolls of a pair of squeeze rolls provided in the roll coating apparatus of FIG.

FIG. 3 is an axial cross-sectional view of a roll for explaining a groove shape of a rubber lining provided on a surface of a squeeze roll provided in the roll coating apparatus of FIG. 1;

FIG. 4 is a schematic view showing an example of another roll coating apparatus according to the embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating an example of a method for applying a coating liquid in the present invention.

FIG. 6 is a diagram showing the relationship between the inter-roll distance and the resin adhesion amount obtained in the example of the present invention.

FIG. 7 is a schematic diagram of a coating apparatus used in a comparative example.

8 is a diagram illustrating a relationship between a roll pressing force and a resin adhesion amount obtained by using the coating apparatus of the comparative example illustrated in FIG. 7;

FIG. 9 is a diagram illustrating a relationship between a calculated adhesion amount and an actual adhesion amount in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal band 2-1 and 2-2 Squeeze roll 3 Coating liquid 4,4-1 to 4-4 Roll chock of squeeze roll 5-1 and 5-2 Ball screw jack 6,6-1 and 6-2 Servo motor 7 -1,7-2 PLG (pulse generator) 8 Roll distance control device 9 Adhesion meter 10 Roll distance control device 11 Coating liquid supply header 12 Coating liquid pan 13 Air cylinder w Squeeze roll Pitch d Depth of groove engraved on squeeze roll surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Munehiro Ishioka, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Kokan Co., Ltd. (72) Akira Takagi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan F-term in Nippon Kokan Co., Ltd. (reference) 4D075 AC24 AC29 AC92 AC93 AC94 AC95 DA03 DB01 4F040 AA24 AC02 BA23 BA27 CB03 CB06 CB14 CB31

Claims (6)

[Claims] A ball screw for adjusting a reduction amount of one of the squeeze rolls in a roll coating apparatus provided with a pair of squeeze rolls for coating a coating liquid provided with a rubber strip on the running metal band. Jack and
A roll coating apparatus, comprising: a servo motor for driving the ball screw jack; and means for measuring a distance between the pair of squeeze rolls. 2. The roll coating according to claim 1, wherein a means for measuring the distance between the pair of squeeze rolls is a PLG (pulse generator) connected to a ball screw jack. apparatus. 3. The roll coating apparatus according to claim 1, wherein the rubber-lined squeeze roll has a V-shaped groove having a pitch of 0.2 to 3 mm on the surface. 4. A roll coating device includes an on-line coating amount meter downstream of the coating section, and is capable of controlling the distance between the pair of squeeze rolls based on the coating liquid adhesion amount detected by the coating amount meter. The roll coating device according to any one of claims 1 to 3, further comprising a control device arranged in the roll coating device. 5. A method for applying a coating liquid using the roll coating apparatus according to claim 1, wherein the width of the metal band, the thickness of the metal band, the traveling speed of the metal band, and the concentration of the coating liquid. Or a distance between the pair of squeeze rolls is provided so that the amount of adhesion after drying the coating liquid is constant according to the groove shape of the surface of the squeeze roll. 6. A method for applying a coating liquid using the roll coating apparatus according to claim 4, wherein the width of the metal band, the thickness of the metal band, the traveling speed of the metal band, the concentration of the coating liquid, or a squeeze roll. According to the groove shape of the surface, the distance between the pair of squeeze rolls is given so that the adhesion amount after the coating liquid is dried is constant, and based on the coating liquid adhesion amount measured by the online adhesion meter, A method for applying a coating liquid, comprising performing feedback control for correcting the distance between the rolls provided according to the deviation between the measured adhesion amount and the target adhesion amount.