JP5088791B2 - Coating apparatus control method and coating system - Google Patents

Description

  The present invention relates to a method for controlling a coating apparatus that applies a liquid to an object to be coated, and a coating system including the coating apparatus.

  2. Description of the Related Art Conventionally, in a post-processing facility for post-processing a metal plate, a processing liquid is sequentially applied to the traveling metal plate, and the traveling metal plate coated with the processing liquid is sequentially heat-treated. In this way, a film is formed on the metal plate. A processing liquid is applied to the traveling metal plate by a coating device.

  In the conventional coating apparatus, when adjusting the adhesion amount of the film formed on the metal plate after the heat treatment, the adhesion amount of the film is detected, and the coating apparatus is feedback-controlled based on the detection result. In this way, the coating conditions of the coating apparatus can be corrected, and thereby the amount of the coating film can be adjusted with high accuracy. A technique similar to such a technique is disclosed in Patent Document 1.

Japanese Patent Laid-Open No. 6-102034

  In the conventional coating apparatus, the coating amount cannot be detected and the coating conditions cannot be corrected until the coating formation portion reaches the deposition amount detection position. Therefore, there is a problem that the coating amount cannot be adjusted for the portion where the treatment liquid is applied before the coating formation reaches the adhesion amount detection position, and the adhesion may be abnormal. .

  The adhesion amount detection position is far away from the application position. In one example, the adhesion amount detection position is about 130 m away from the application position. In this case, a portion where the amount of the coating film cannot be adjusted becomes large.

  The objective of this invention is providing the control method and coating system of a coating device which can prevent the adhesion amount of a film | membrane becoming abnormal as much as possible.

The present invention provides a post-processing facility for forming a film on the surface of a metal plate by sequentially applying the treatment liquid to the running metal plate and then sequentially heat-treating the running metal plate to which the treatment liquid has been applied. A method of controlling a coating apparatus for applying a treatment liquid to a metal plate,
The metal plate of the metal plate set on the metal plate upstream of the condition change point when the condition change point at which the condition including the traveling speed of the metal plate set on the metal plate changes passes through the coating position. based on the conditions including the coating amount per unit time, and set the coating conditions including at least one spacing and roll peripheral speed of the roll to control the coating apparatus,
While tracking the condition changes, the when the condition changes has passed the adhesion amount detection position, by detecting the amount of adhered film formed on the surface of the metal plate after the heat treatment,
Calculate the rate of change of the actual adhesion amount with respect to the target amount of adhesion, and control the coating device so that when the rate of change is positive, the peripheral speed of the roll is low, and when the rate of change is negative, the peripheral speed of the roll is high. This is a method for controlling a coating apparatus.

The present invention, the coating apparatus is characterized in that via a plurality of rolls provided in parallel close to each other, Ru is configured to process liquid to be applied to the metal plate.

In the present invention, the coating apparatus includes a pair of coating units that are provided to face each other via a metal plate and apply the treatment liquid to both surfaces of the metal plate,
Each coating unit has a proximity roll provided close to the metal plate, and is configured to apply the treatment liquid to the metal plate via the proximity roll .
Coating fabric conditions, characterized in that it comprises a spacing proximity rolls of each coating unit.

  In addition, the present invention is characterized in that each time the condition change point passes the application position, the application condition is reset based on the metal plate condition set in the metal plate upstream of the condition change point in the traveling direction. .

Further, the present invention is a post-treatment for forming a film on the surface of the metal plate by sequentially applying the treatment liquid to the running metal plate and then sequentially heat-treating the running metal plate to which the treatment liquid has been applied. An application system provided in the facility,
An application device configured to change the application conditions and sequentially applying the treatment liquid to the traveling metal plate;
A storage device for storing the metal plate condition set for the metal plate in association with the coating condition of the coating device;
An adhesion amount detection device for detecting the adhesion amount of the film formed on the surface of the metal plate after the heat treatment;
A control device for controlling a coating apparatus, wherein (a) a condition change point where a condition including a traveling speed of a metal plate set on a metal plate changes passes a coating direction when the condition change point passes through the application position. Under the terms of the metal plate is set on the upstream side of the metal plate, the coating amount per unit from the storage unit time to obtain the coating conditions including at least one spacing and roll peripheral speed of the roll, the coating obtained (B) While tracking the condition change point, when the condition change point passes the adhesion amount detection position, the film formed on the surface of the metal plate after the heat treatment by the adhesion amount detection device is set. Based on the detection result of the adhesion amount, the rate of change of the actual value of the adhesion amount with respect to the target value of the adhesion amount is calculated. When the change rate is positive, the peripheral speed of the roll is low, and when the change rate is negative, the peripheral speed of the roll control the coating apparatus so that the higher A coating system which comprises a control device for.

  According to the present invention, in the post-processing facility, the treatment liquid is sequentially applied to the traveling metal plate, and then the traveling metal plate to which the treatment liquid has been applied is sequentially heat-treated to thereby form the surface of the metal plate. A film is formed. The coating apparatus is provided in such post-processing equipment and applies the processing liquid to the metal plate.

When controlling the coating device, when the condition changing point where the condition including the traveling speed of the metal plate set on the metal plate changes passes through the coating position, the metal plate on the upstream side in the traveling direction from the condition changing point. Based on the conditions of the metal plate to be set, the application conditions including at least one of the application amount per unit time, the roll interval, and the roll peripheral speed are set. Therefore, immediately after the condition change point passes the application position, the treatment liquid can be suitably applied, and it is possible that the adhesion amount of the film formed on the surface of the metal plate after heat treatment becomes abnormal as a result. Can be prevented.

In controlling the coating apparatus, the amount of film deposited on the surface of the metal plate after heat treatment is detected when the condition change point passes the adhesion amount detection position while tracking the condition change point. Based on the detection result, the rate of change of the actual amount of adhesion with respect to the target amount of adhesion is calculated. When the rate of change is positive, the peripheral speed of the roll is low, and when the rate of change is negative, the peripheral speed of the roll is Correct the coating conditions to be higher . By correcting the coating conditions in this manner after the film formation portion has passed the adhesion amount detection position, the adhesion amount of the film formed on the surface of the metal plate after the heat treatment can be accurately adjusted.

By setting the coating conditions based on a condition of the metal plate can be roughly adjusted coating weight of the coating. Also, the rate of change of the actual amount of adhesion with respect to the target amount of adhesion is calculated based on the detection result of the amount of adhesion of the film. When the rate of change is positive, the peripheral speed of the roll is low, and when the rate of change is negative, the roll The coating amount can be finely adjusted by correcting the coating conditions so that the peripheral speed is increased . Thus, both rough adjustment and fine adjustment can be performed. Therefore, compared with the case of only rough adjustment and the case of only fine adjustment, the amount of coating can be adjusted with high accuracy.

According to the invention, the coating apparatus is configured to apply the treatment liquid to the metal plate through a plurality of rolls provided in parallel with each other. Such coating apparatus may be surely prevent the adhesion amount of film formed on the metal plate after the heat treatment is abnormal by controlling.

According to the invention, the coating apparatus includes a pair of coating units that are provided to face each other via the metal plate and apply the treatment liquid to both surfaces of the metal plate. Each coating unit has a proximity roll provided close to the metal plate, and is configured to apply the treatment liquid to the metal plate via the proximity roll. In controlling such a coating apparatus, based on the conditions of the metal plate, to set the coating conditions including the distance between the proximity rolls of each coating unit.

According to the present invention, every time the condition change point passes the application position, the application condition is reset based on the condition of the metal plate set on the metal plate on the upstream side in the traveling direction from the condition change point. Therefore, even when the metal plate conditions change many times, it is possible to prevent the amount of the coating formed on the surface of the metal plate after the heat treatment from becoming abnormal.

  Further, according to the present invention, in the post-processing facility, after the treatment liquid is sequentially applied to the traveling metal plate, the traveling metal plate to which the treatment liquid has been applied is sequentially heat-treated, thereby the surface of the metal plate. To form a film. The coating system is provided in such post-processing equipment.

In the coating system, the processing liquid is sequentially applied to the traveling metal plate by the coating device. The coating device is configured to be capable of changing coating conditions including at least one of a coating amount per unit time, a roll interval, and a roll peripheral speed, and is controlled by a control device. The storage device, the coating conditions and are stored in association with at least one of the conditions and the coating device running speed and the thickness of the metal plate is set to the metal plate. In the adhesion amount detection device, the amount of adhesion of the film formed on the surface of the metal plate after the heat treatment is detected when the condition change point passes the adhesion amount detection position while tracking the condition change point .

Controller, when the condition change point at which the condition of the metal plate to be set in the metal plate is changed to pass through a coating position, the condition of the metal plate is set to the metal plate in the running direction upstream side of the condition change point based on, seek the coating condition from the storage unit and sets the obtained coating conditions. Immediately after the condition change point has passed the coating position Thus, the processing liquid can be suitably applied to, thereby Kakyu that adhesion amount of film formed on the surface of the metal plate after the heat treatment becomes abnormal Can be prevented.

Further, the control device calculates the rate of change of the actual amount of adhesion with respect to the target amount of adhesion based on the detection result of the amount of adhesion detection device. When the rate of change is positive, the peripheral speed of the roll is low and the rate of change is negative. In this case, the coating conditions are corrected so as to increase the peripheral speed of the roll . By correcting the coating conditions in this manner after the film formation portion has passed the adhesion amount detection position, the adhesion amount of the film formed on the surface of the metal plate after the heat treatment can be accurately adjusted.

By setting the coating conditions based on a condition of the metal plate, it is possible to roughly adjusted coating weight of the coating. And by correcting the coating conditions based on a detection result of the deposition amount of the coating, it is possible to finely adjust the coating weight of the coating. Thus, both rough adjustment and fine adjustment can be performed. Therefore, compared with the case of only rough adjustment and the case of only fine adjustment, the amount of coating can be adjusted with high accuracy.

  FIG. 1 is a diagram showing a simplified configuration of a coating system 101 according to an embodiment of the present invention. The coating system 101 is provided in the post-processing facility 11 that post-processes the metal plate 18. The metal plate 18 is, for example, a steel plate. In post-processing by the post-processing equipment 11, a plurality of metal plates 18 are joined to each other by welding to form a metal strip, and the metal strip is traveled along the travel route 2. In the present embodiment, it is assumed that the thickness dimension of each metal plate 18 is the same.

  The post-processing equipment 11 sequentially applies the treatment liquid 19 to the traveling metal plate 18 and then sequentially heat-treats the traveling metal plate 18 coated with the treatment liquid 19 to the surface of the metal plate 18. A film is formed. The treatment liquid 19 is a liquid containing a film component to be formed on the metal plate 18. In the present embodiment, the component of the film is chromium (Cr).

Application system 101 is capable of changing the coating conditions, a roll coating device 1 is a coating apparatus for sequentially applying a treatment liquid 19 to the metal plate 18 during traveling, traveling of the metal plate is set to the metal plate 18 Metal plate conditions including speed (hereinafter, sometimes simply referred to as metal plate conditions) and coating conditions including at least one of the coating amount per unit time of the roll coating apparatus 1 , the interval between the rolls, and the peripheral speed of the roll (hereinafter, A storage device 102 that associates and stores the application amount), an adhesion amount detection device 103 that detects the adhesion amount of the film formed on the surface of the metal plate 18 after the heat treatment, and the roll application device 1. A control device 10 for controlling, obtains application conditions from the storage device 102 based on the metal plate conditions set on the metal plate 18, sets the obtained application conditions, and sets the adhesion amount detection device 103. Based on a detection result adhesion amount actual value by including the control unit 10 to correct the coating conditions.

  FIG. 2 is a diagram showing a simplified configuration of the post-processing facility 11. The post-processing equipment 11 includes a coating system 101, a drying furnace 12, a heating furnace 13, and a plurality of cooling devices 14. The drying furnace 12 is provided on the downstream side in the traveling direction X from the roll coating apparatus 1 of the coating system 101, and dries the coating film formed on the metal plate 18 by the roll coating apparatus 1. The heating furnace 13 is provided on the downstream side in the traveling direction X from the drying furnace 12 and heats the traveling metal plate 18. The plurality of cooling devices 14 are provided downstream of the heating furnace 13 in the traveling direction X, and cool the traveling metal plate 18. The adhesion amount detection device 103 of the coating system 101 is provided downstream of the plurality of cooling devices 14 in the traveling direction X.

  Referring again to FIG. 1, the roll coating apparatus 1 includes a pair of coating units that are provided to face each other via the traveling metal plate 18 and that respectively apply the treatment liquid 19 to both surfaces of the metal plate 18. Specifically, the roll coating apparatus 1 is disposed above the traveling path 2, and an upper unit 3 a that is a coating unit that applies the treatment liquid 19 to the upper surface of the traveling metal plate 18, and below the traveling path 2. The lower unit 3b, which is a coating unit that is disposed and applies the processing liquid 19 to the lower surface of the traveling metal plate 18, is provided. The upper unit 3 a and the lower unit 3 b are arranged at substantially the same position with respect to the traveling direction X of the metal plate 18.

  In the present embodiment, since the configuration of the upper unit 3a and the configuration of the lower unit 3b are similar, only the upper unit 3a will be described, and only the points that are different from the upper unit 3a will be described. Parts corresponding to each other between the upper unit 3a and the lower unit 3b are denoted by the same reference numerals.

  The upper unit 3a has a plurality of rolls 21 to 23 provided in parallel with each other. The plurality of rolls 21 to 23 are running a pickup roll (hereinafter referred to as “P roll”) 21 that pulls up the processing liquid 19 from the pan 20 in which the processing liquid 19 is stored, and a processing liquid 19 that is pulled up by the P roll 21. An applicator roll (hereinafter referred to as “A roll”) 22 to be applied to the metal plate 18 and a transfer roll that is interposed between the P roll 21 and the A roll 22 and moves the treatment liquid 19 from the P roll 21 to the A roll 22. (Hereinafter referred to as “T-roll”) 23. The A roll 22 is a proximity roll provided close to the metal plate 18. Hereinafter, the P roll 21, the A roll 22, and the T roll 23 may be collectively referred to as a roll 4.

  The axis lines L1, L2, and L3 of the rolls 21 to 23 are horizontal and perpendicular to the traveling direction X. The A roll 22 is disposed downstream of the P roll 21 in the traveling direction X. The T roll 23 is disposed between the P roll 21 and the A roll 22 with respect to the traveling direction X. The outer peripheral part of each roll trunk part of P roll 21 and A roll 22 consists of elastic materials, for example, urethane. The outer peripheral portion of the roll body portion of the T roll 23 is made of a rigid material such as iron.

  The rolls 21 to 23 are individually driven to rotate around the axis lines L1 to L3. The rotation direction of each roll 21-23 may be either clockwise or counterclockwise. In the present embodiment, the A roll 22 is rotationally driven to oppose the traveling of the traveling metal plate 18, the T roll 23 is rotationally driven in the same direction as the rotational direction of the A roll 22, and the P roll 21 is A The roll 22 is rotationally driven in a direction opposite to the rotational direction of the roll 22.

  The P roll 21 is partially immersed in the processing liquid 19 stored in the pan 20. When the P roll 21 is driven to rotate, the processing liquid 19 in the pan 20 is pulled up. The treatment liquid 19 pulled up by the P roll 21 is supplied from the P roll 21 to the T roll 23. The treatment liquid 19 supplied from the P roll 21 to the T roll 23 is supplied from the T roll 23 to the A roll 22 when the T roll 23 is rotationally driven. The treatment liquid 19 supplied from the T roll 23 to the A roll 22 is applied to the traveling metal plate 18 when the A roll 22 is rotationally driven. In this way, the treatment liquid 19 can be moved through the rolls 21 to 23 and applied to the traveling metal plate 18.

  The peripheral speeds of the rolls 21 to 23 are individually set by the control device 10. By changing the peripheral speed of each roll 21-23, the adhesion amount of the film | membrane formed in the metal plate 18 after heat processing can be changed.

  The roll intervals of the rolls 21 to 23 are individually set by the control device 10. Each roll interval of each of the rolls 21 to 23 includes an interval between the P roll 21 and the T roll 23 (hereinafter referred to as “PT gap”), and an interval between the T roll 23 and the A roll 22 (hereinafter referred to as “TA gap”). including. By changing each roll interval of each roll 21-23, the adhesion amount of the film | membrane formed in the metal plate 18 after heat processing can be changed.

  FIG. 3 is a graph showing the relationship between the T-roll peripheral speed ratio and the Cr adhesion amount. In FIG. 3, the horizontal axis represents the peripheral speed ratio of the T roll 23, and the vertical axis represents the amount of Cr deposited on the metal plate 18 after the heat treatment. The circumferential speed ratio is the ratio of the circumferential speed to the traveling speed of the metal plate 18. In FIG. 3, the circumferential speed ratio of the P roll 21 and the circumferential speed ratio of the A roll 22 and the roll intervals of the rolls 21 to 23 are kept constant when the metal plate 18 is run at a running speed LS of 77 mpm. The amount of Cr deposited when the peripheral speed ratio of the T-roll 21 is changed is shown. The peripheral speed ratio of the P roll 21 is 50%, and the peripheral speed ratio of the A roll 22 is 220%. The PT gap is -1.00 mm and the TA gap is -0.25 mm. From the results shown in FIG. 3, it can be seen that the amount of Cr deposited increases as the peripheral speed ratio of the T-roll 21 is increased.

  FIG. 4 is a graph showing the relationship between the PT gap and the Cr adhesion amount. In FIG. 4, the horizontal axis indicates the PT gap, and the vertical axis indicates the amount of Cr deposited on the metal plate 18 after the heat treatment. In FIG. 4, the circumferential speed ratio and the TA gap of each of the rolls 21 to 23 are obtained when the metal plate 18 is traveled at a travel speed LS of 173 mpm and when the metal plate 18 is traveled at a travel speed LS of 200 mpm. The adhesion amount of Cr when the PT gap is changed with the constant is shown. The peripheral speed ratio of the P roll 21 is 50%, the peripheral speed ratio of the A roll 22 is 220%, and the peripheral speed ratio of the T roll 23 is 270%. The TA gap is -0.25 mm. From the results shown in FIG. 4, it can be seen that the amount of Cr deposited increases as the PT gap is increased within a range smaller than 0 mm.

  FIG. 5 is a graph showing the relationship between the traveling speed LS and the Cr adhesion amount. In FIG. 5, the horizontal axis represents the traveling speed LS of the metal plate 18, and the vertical axis represents the amount of Cr deposited on the metal plate 18 after heat treatment. In FIG. 5, with respect to the surface that becomes the upper surface and the lower surface of the metal plate 18 at the application position, the peripheral speed ratio of the rolls 21 to 23 and the interval between the rolls of the rolls 21 to 23 are made constant. The amount of Cr deposited when the running speed LS is changed is shown. The peripheral speed ratio of the P roll 21 is 50%, the peripheral speed ratio of the A roll 22 is 220%, and the peripheral speed ratio of the T roll 23 is 270%. The PT gap is -1.00 mm and the TA gap is -0.25 mm. From the results shown in FIG. 5, the amount of Cr deposited becomes maximum when the traveling speed LS is a certain value, decreases as the traveling speed LS becomes smaller than this value, and becomes larger than this value. It can be seen that it decreases with time.

  FIG. 6 is a flowchart for explaining an application condition adjusting operation by the control device 10. The description of the coating condition adjusting operation also serves as the description of the control method of the coating apparatus. The control device 10 performs the application condition adjusting operation individually on the upper unit 3a and the lower unit 3b. The application condition adjusting operations for the upper unit 3a and the lower unit 3b are executed in parallel. Each application condition adjustment operation is the same.

  The application condition adjustment operation is started when a start command for the application condition adjustment operation is given. When the application condition adjustment operation is started, it is first determined in step a1 whether or not arrival information indicating that the condition change point has reached the adjustment start position is given. The condition change point is a point at which the metal plate condition set for the metal plate 18 changes. In the present embodiment, the metal plate condition is set for each metal plate 18, and therefore the condition change point is a welding point of the metal plate 18. The adjustment start position is set in advance for the travel route 2. This adjustment start position is, for example, a coating position. The arrival information is given from the overall control device 96.

  From the overall control device 96, the metal plate condition set to the metal plate 18 on the upstream side in the traveling direction X from the condition change point is given together with the arrival information. In the present embodiment, the metal plate condition includes a processing mode for the metal plate 18 after passing through the application position, and a traveling speed of the metal plate 18. The processing for the metal plate 18 after passing through the application position includes drying, heating and cooling. The overall control device 96 gives the arrival information and the metal plate condition to the control device 10 every time the condition change point reaches the adjustment start position.

  Next, in step a2, the application condition is obtained from the storage device 102 based on the metal plate condition from the overall control device 96, and the obtained application condition is set. The storage device 102 stores the traveling speed of the metal plate 18 and the coating condition of the roll coating device 1 in association with each processing mode for the metal plate 18 after passing through the coating position. The application conditions set here include the application amount per unit time, and specifically include the roll intervals of the rolls 21 to 23 and the peripheral speeds of the rolls 21 to 23.

  Next, in step a3, the tracking of the condition change point is started. The condition change point is tracked by integrating the travel speed set on the metal plate 18 upstream in the travel direction X with respect to the condition change point over time to obtain the position of the condition change point in the travel route 2.

  Next, in step a4, based on the tracking result of the condition change point, it is determined whether or not the condition change point has passed the adhesion amount detection position. Step a4 is repeatedly executed until the condition change point passes the adhesion amount detection position. If it is determined that the condition change point has passed the adhesion amount detection position, the process proceeds to step a5. In step a5, the actual adhesion amount value is acquired from the adhesion amount detection device 103.

  Next, in step a6, the rate of change is calculated based on the actual amount of adhesion obtained in step a5. The rate of change is obtained by dividing the value obtained by subtracting the adhesion amount target value from the actual adhesion amount value and dividing the value by the adhesion amount target value and multiplying by 100.

  Next, in step a7, the coating conditions are corrected based on the rate of change calculated in step a6. The application condition to be corrected here is the peripheral speed of the T roll 23. When the rate of change is positive, the peripheral speed of the T-roll 23 is decreased, and when the rate of change is negative, the peripheral speed of the T-roll 23 is increased. Further, the larger the absolute value of the change rate, the larger the peripheral speed of the T roll 23 is changed. In this way, the coating amount of the film can be adjusted.

  Next, in step a8, it is determined whether or not new arrival information has been given. Thereby, it can be determined whether or not the next condition change point has reached the adjustment start position. If it is determined that new arrival information is not given, the process returns to step a5, and thus steps a5 to a8 are repeatedly executed until new arrival information is given. If it is determined that new arrival information has been given, the process returns to step a2. Thus, each time the condition change point passes the application position, the application condition can be reset based on the metal plate condition set on the metal plate 18 upstream in the traveling direction X from the condition change point.

  According to the present embodiment as described above, the control device 10 determines that the metal plate condition is set on the metal plate 18 on the upstream side in the traveling direction X from the condition change point when the condition change point passes through the application position. Based on the above, the application condition is obtained from the storage device 102, and the obtained application condition is set. Accordingly, the treatment liquid 19 can be suitably applied immediately after the condition change point passes the application position, and this can cause an abnormal amount of film to be formed on the surface of the metal plate 18 after the heat treatment. It can be prevented as much as possible.

  Further, the control device 10 corrects the application condition based on the actual adhesion amount value by the adhesion amount detection device 103. By correcting the coating conditions in this manner after the film formation portion has passed the adhesion amount detection position, the adhesion amount of the film formed on the surface of the metal plate 18 after the heat treatment can be accurately adjusted. .

  By setting the coating conditions based on the metal plate conditions, the coating amount can be roughly adjusted. Further, the coating amount can be finely adjusted by correcting the coating conditions based on the actual amount of coating. Thus, both rough adjustment and fine adjustment can be performed. Therefore, compared with the case of only rough adjustment and the case of only fine adjustment, the amount of coating can be adjusted with high accuracy.

  Further, according to the present embodiment, the control device 10 sets the application condition including the application amount per unit time based on the metal plate condition including the traveling speed of the metal plate 18. Specifically, the control device 10 sets application conditions including the roll intervals of the rolls 21 to 23 and the peripheral speeds of the rolls 21 to 23 based on the metal plate conditions including the traveling speed of the metal plate 18. . As a result, it is possible to reliably prevent the adhesion amount of the film formed on the metal plate 18 after the heat treatment from becoming abnormal.

  Moreover, according to this Embodiment, whenever the condition change point passes the application | coating position, the control apparatus 10 is based on the metal plate conditions set to the metal plate 18 of the running direction X upstream rather than a condition change point. Reset application conditions. Therefore, even when the metal plate conditions change many times, it is possible to prevent the amount of the coating formed on the surface of the metal plate 18 after the heat treatment from becoming abnormal.

  Further, according to the present embodiment, the application condition to be corrected is the peripheral speed of the T roll 23. In other words, the peripheral speeds of the P roll 21 and the A roll 22 are not corrected. When the peripheral speed of the P roll 21 is corrected, the treatment liquid 19 may be scattered. When the peripheral speed of the A roll 22 is corrected, an application amount adjustment failure may occur. When correcting the peripheral speed of the T-roll 23, these problems can be prevented and the occurrence of defects can be prevented. Further, when the peripheral speed of the T roll 23 is corrected, the coating amount per unit time can be easily finely adjusted as compared with the case where the roll intervals of the rolls 21 to 23 are corrected.

  FIG. 7 is a diagram illustrating the configuration of the roll coating apparatus 1. The upper unit 3a supports each roll 4 so as to be rotatable around each axis, and supports means 5 configured to be able to change the interval between adjacent rolls 4 and rotation for driving each roll 4 to rotate around each axis. Driving means 6, changing means 7 for changing the interval between the adjacent rolls 4, pressing force detecting means 8 for detecting the pressing force between the adjacent rolls 4 for each adjacent roll 4, and each adjacent roll 4 for each roll 4. Displacement detecting means 9 for detecting relative displacement is further included.

  The support means 5 is fixed to a base and supports an A roll 22 rotatably around its axis L2, and slides in the running direction X and the opposite direction with respect to the A roll support 26. A T-roll support 27 that is provided so as to be displaceable and supports the T-roll 23 so as to be rotatable around its axis L3; and is provided so as to be slidable in the running direction X and the opposite direction with respect to the T-roll support 27 And a P roll support 28 that rotatably supports the P roll 21 around its axis L1.

  Since the T roll support 27 is provided so as to be slidable in the traveling direction X and the opposite direction with respect to the A roll support 26, the T roll 23 can be moved closer to and away from the A roll 22. By bringing the T roll 23 close to the A roll 22, the processing liquid 19 can be moved from the T roll 23 to the A roll 22. By separating the T-roll 23 from the A-roll 22, the attaching / detaching work of the A-roll 22 to the A-roll support 26 and the attaching / detaching work of the T-roll 23 to the T-roll support 27 can be facilitated. Furthermore, in the proximity state, the TA gap can be adjusted, whereby the amount of the processing liquid 19 that moves from the T roll 23 to the A roll 22 can be adjusted.

  Since the P roll support 28 is provided so as to be slidable in the traveling direction X and the opposite direction with respect to the T roll support 27, the P roll 21 can be moved closer to and away from the T roll 23. By bringing the P roll 21 close to the T roll 23, the treatment liquid 19 can be moved from the P roll 21 to the T roll 23. By separating the P roll 21 from the T roll 23, the attaching / detaching work of the T roll 23 to / from the T roll support 27 and the attaching / detaching work of the P roll 21 to the P roll support 28 can be facilitated. Furthermore, in the proximity state, the PT gap can be adjusted, whereby the amount of the processing liquid 19 that moves from the P roll 21 to the T roll 23 can be adjusted.

  In the upper unit 3a, the A roll support 26 is fixed to the base as described above, but in the lower unit 3b, the A roll support 26 slides in the traveling direction X and the opposite direction with respect to the base. Displaceable. Since the A roll support 26 is slidably displaced in the traveling direction X and the opposite direction with respect to the base, the traveling direction X between the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b is provided. It is possible to change the offset amount d, which is the amount of deviation with respect to. By providing an offset between the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b, it is possible to prevent the portions of each A roll 22 protruding on both sides in the width direction of the metal plate 18 from contacting each other. it can.

  The A roll support 26 has a pair of A roll support portions 30 that respectively support both ends of the A roll 22 in the axial direction. Each A roll support portion 30 is fixed to the base. Each A roll support portion 30 is provided with a base 31, a support portion 32 that is provided at an interval from the base 31 in the traveling direction X, and supports an end portion in the axial direction of the A roll 22, and the base 31 and the support portion 32. And a connecting portion 33 for connecting the two. In the upper unit 3a, each A roll support portion 30 is fixed to the base as described above, but in the lower unit 3b, each A roll support portion 30 is in the traveling direction X and the opposite direction with respect to the base. Are individually slidable.

  The T roll support 27 includes a pair of T roll support portions 35 that respectively support both ends of the T roll 23 in the axial direction. Each T roll support portion 35 is interposed between the base portion 31 and the support portion 32 of each A roll support portion 30. Each T-roll support portion 35 is provided to be individually slidable in the traveling direction X and the opposite direction with respect to each A-roll support portion 30. Each T-roll support portion 35 is provided with a base portion 36, spaced from the base portion 36 in the traveling direction X, and a support portion 37 that supports an end portion of the T-roll 23 in the axial direction, a base portion 36, and a support portion 37. And a connecting portion 38 for connecting the two.

  The P roll support 28 has a pair of P roll support portions 40 that respectively support both ends of the P roll 21 in the axial direction. Each P roll support portion 40 is interposed between a base portion 36 and a support portion 37 of each T roll support portion 35. Each P roll support portion 40 is provided to be individually slidable in the traveling direction X and the opposite direction with respect to each T roll support portion 35. Each P-roll support portion 40 includes a base portion 41 and a support portion 42 that is connected to a portion of the base portion 41 on the downstream side in the running direction X and supports the end portion of the P-roll 21 in the axial direction.

  The rotation driving means 6 has a plurality of rotation driving units provided for each roll. Each rotation drive unit is interposed between the rotation drive source 44, a power transmission unit that transmits the rotational power of the rotation drive source 44 to the roll, and the rotation drive source 44 and the power transmission unit. A speed reducer that decelerates the power and transmits the power to the power transmission unit. Each rotation drive source 44 is realized by an electromagnetic motor, for example, a vector motor. Each power transmission unit includes a rotation shaft, a first joint that connects the output shaft and the rotation shaft of the rotation drive source 44, and a second joint that connects the rotation shaft and the roll. Each first joint and each second joint are realized by constant velocity ball joints.

  The changing means 7 includes a first changing means 46 for changing the PT gap by sliding and driving the P roll support 28 in the running direction X and the opposite direction with respect to the T roll support 27, and the T roll support. And a second changing means 45 for changing the TA gap by slidably driving 27 in the running direction X and the opposite direction with respect to the A roll support 26.

  The first changing means 46 has a pair of first changing portions 55 that individually slide and drive each P roll support portion 40 with respect to each T roll support portion 35. Each first change portion 55 includes a slide displacement drive source 56 fixed to the base portion 36 of the T roll support portion 35, a screw shaft 57 that is rotationally driven by the slide displacement drive source 56, and a base portion 36 of the T roll support portion 35. And a speed reducer 58 that is interposed between the slide displacement drive source 56 and the screw shaft 57 and decelerates the rotational power of the slide displacement drive source 56 and transmits it to the screw shaft 57, and the base of the P roll support portion 40 And a ball screw nut 59 through which the screw shaft 57 is inserted and screwed. Each slide displacement drive source 56 is realized by a servo motor. Each reduction gear 58 is realized by a worm reduction gear. Each of the first change portions 55 is configured such that no mechanical gap is generated.

  The second changing means 45 has a pair of second changing portions 50 that individually slide and drive the T roll support portions 35 with respect to the A roll support portions 30. Each second change portion 50 includes a slide displacement drive source 51 fixed to the base 31 of the A roll support portion 30, a screw shaft 52 that is rotationally driven by the slide displacement drive source 51, and a base 31 of the A roll support portion 30. And a speed reducer 53 that is interposed between the slide displacement drive source 51 and the screw shaft 52, decelerates the rotational power of the slide displacement drive source 51, and transmits it to the screw shaft 52, and a base portion of the T-roll support portion 35 And a ball screw nut 54 through which the screw shaft 52 is inserted and screwed. Each slide displacement drive source 51 is realized by a servo motor. Each reduction gear 53 is realized by a worm reduction gear. Each of the second change parts 50 is configured such that no mechanical gap is generated.

  The lower unit 3 b includes a third changing unit 47 in addition to the first and second changing units 46 and 45. The third changing means 47 drives the A roll support 26 to slide in the traveling direction X and the opposite direction with respect to the base, and moves the A roll 22 of the upper unit 3a and the A roll of the lower unit 3b with respect to the traveling direction X. 22 is changed. This offset amount d is set in advance and is fixed.

  The 3rd change means 47 has a pair of 3rd change part 60 which each slide-drives each A roll support part 30 with respect to a base individually. Each third change portion 60 includes a slide displacement drive source 61 fixed to the base 31 of the A roll support portion 30, a screw shaft 62 driven to rotate by the slide displacement drive source 61, and a base 31 of the A roll support portion 30. And a speed reducer 63 that is interposed between the slide displacement drive means 61 and the screw shaft 62, decelerates the rotational power of the slide displacement drive source 61 and transmits it to the screw shaft 62, and is fixed to the base. It has a ball screw nut 64 into which the shaft 62 is inserted and screwed. Each slide displacement drive source 61 is realized by a servo motor. Each reduction gear 63 is realized by a worm reduction gear. Each of the third change parts 60 is configured such that no mechanical gap is generated.

  FIG. 8 is a diagram showing the arrangement of the pressing force detection means 8. The pressing force detection means 8 includes a first pressing force detection means 67 for detecting the pressing force between the rolls 23 and 21 for the T roll 23 and the P roll 21, and the rolls 22 and 23 for the A roll 22 and the T roll 23. And a second pressing force detecting means 66 for detecting the pressing force therebetween.

  The first pressing force detection means 67 has a pair of first pressing force detectors 69 that respectively detect the pressing forces near both ends in the axial direction of the roll. Each first pressing force detection unit 69 is provided on the support portion 42 of each P roll support portion 40. Each of the first pressing force detectors 69 is realized by a load cell that is a load converter that converts a load into an electrical signal.

  The second pressing force detection means 66 has a pair of second pressing force detectors 68 that respectively detect the pressing forces near both ends in the axial direction of the roll. Each second pressing force detection unit 68 is provided on the support portion 37 of each T-roll support portion 35. Each of the second pressing force detectors 68 is realized by a load cell that is a load converter that converts a load into an electrical signal.

  FIG. 9 is an enlarged view showing a part of the upper unit 3a. The support portion 32 of each A roll support portion 30 includes a bearing portion 71 that rotatably supports the roll shaft portion of the A roll 22, an AR chock 72 that is a chock that accommodates and fixes the bearing portion 71, and an AR chock. And AR chock fixing part 73 which is a chock fixing part for fixing 72.

  The support portion 37 of each T roll support portion 35 includes a bearing portion 76 that rotatably supports the roll shaft portion of the T roll 23, a TR chock 77 that is a chock that accommodates and fixes the bearing portion 76, and a TR chock. TR chock fixing part 78 which is a chock fixing part for fixing 77. The TR chock fixing portion 78 is generally formed in a C shape and is opened facing the support portion 32 of the A roll support portion 30.

  The TR chock fixing part 78 is provided with a second pressing force detection part 68. The second pressing force detection unit 68 is disposed on the opposite side of the AR chock 72 with respect to the TR chock 77. The TR chock 77 is provided with a second pressing piece 79 that presses the second pressing force detection unit 68. The second pressing piece 79 is disposed so as to face the second pressing force detection unit 68. In the state where the A roll 22 and the T roll 23 are not in contact with each other, the second pressing force detection unit 68 and the second pressing piece 79 have an initial pressing force set value that is detected by the second pressing force detection unit 68. To be in contact with each other. The initial pressing force set value is selected to be a value exceeding 0N. The initial pressing force set value is set to 500 N, for example.

  The support portion 42 of each P roll support portion 40 includes a bearing portion 81 that rotatably supports the roll shaft portion of the P roll 21, a PR chock 82 that is a chock that accommodates and fixes the bearing portion 81, and a PR chock. PR chock fixing part 83 which is a chock fixing part for fixing 82. The PR chock fixing portion 83 is generally formed in a C shape and is opened facing the support portion 37 of the T roll support portion 35.

  The PR chock fixing unit 83 is provided with a first pressing force detection unit 69. The first pressing force detector 69 is disposed on the opposite side of the TR chock 77 with respect to the PR chock 82. The PR chock 82 is provided with a first pressing piece 84 that presses the first pressing force detector 69. The first pressing piece 84 is disposed so as to face the first pressing force detection unit 69. The first pressing force detection unit 69 and the first pressing piece 84 are such that the pressing force detected by the first pressing force detection unit 69 is the initial pressing force setting value when the T roll 23 and the P roll 21 are not in contact with each other. To be in contact with each other. The initial pressing force set value is selected to be a value exceeding 0N. The initial pressing force set value is set to 500 N, for example.

  Referring to FIG. 7 again, the displacement detection means 9 includes a first displacement detection means 87 for detecting the relative displacement of the rolls 23 and 21 with respect to the T roll 23 and the P roll 21, and the A roll 22 and the T roll. 23, second displacement detecting means 86 for detecting the relative displacement of each roll 22, 23.

  The first displacement detector 87 includes a pair of first displacement detectors 89 that are provided in the slide displacement drive source 56 of each first change portion 55 and detect the rotation angle of the output shaft of each slide displacement drive source 56. Each first displacement detector 89 can detect the displacement of each P roll support 28 with respect to each T roll support 27 by detecting the rotation angle of the output shaft of each slide displacement drive source 56. Each of the first displacement detectors 89 is realized by an encoder.

  The second displacement detector 86 includes a pair of second displacement detectors 88 that are provided in the slide displacement drive source 51 of each second change portion 50 and detect the rotation angle of the output shaft of each slide displacement drive source 51. Each second displacement detector 88 can detect the displacement of each T roll support 27 with respect to each A roll support 26 by detecting the rotation angle of the output shaft of each slide displacement drive source 51. Each such second displacement detector 88 is realized by an encoder.

  The lower unit 3b includes third displacement detection means 90 in addition to the first and second displacement detection means 87 and 86. The third displacement detector 90 detects the relative displacement of each roll 22 with respect to the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b. The third displacement detector 90 includes a pair of third displacement detectors 91 that are provided in the slide displacement drive source 61 of each third change portion 60 and detect the rotation angle of the output shaft of each slide displacement drive source 61. Each third displacement detector 91 can detect the displacement of each A roll support 26 relative to the base by detecting the rotation angle of the output shaft of each slide displacement drive source 61. Each such third displacement detector 91 is realized by an encoder.

  FIG. 10 is a block diagram showing in detail the electrical configuration of the part related to the upper unit 3a. The control device 10 is common to the upper unit 3a and the lower unit 3b. The control device 10 is controlled by a general control device 96 that comprehensively controls the entire post-processing facility 11.

  Each pressing force detected by each first pressing force detector 69 and each displacement detected by each first displacement detector 89 are given to the control device 10. The control device 10 controls the slide displacement driving source 56 of each first change portion 55 based on each pressing force detected by each first pressing force detection unit 69 and each displacement detected by each first displacement detection unit 89. Are controlled individually. In this way, the PT gap can be adjusted.

  Further, the control device 10 is given each pressing force detected by each second pressing force detection unit 68 and each displacement detected by each second displacement detection unit 88. The control device 10 determines the slide displacement drive source 51 of each first change portion 50 based on each pressing force detected by each second pressing force detector 68 and each displacement detected by each second displacement detector 88. Are controlled individually. In this way, the TA gap can be adjusted.

  Further, the control device 10 individually controls the rotation drive source 44 of each rotation drive unit. In this way, the peripheral speeds of the rolls 21 to 23 can be individually adjusted.

  Although the lower unit 3b is not illustrated, each displacement detected by each third displacement detector 91 is further given to the control device 10. The control device 10 individually controls the slide displacement drive source 61 of each third change portion 60 based on each displacement detected by each third displacement detector 91. In this way, the offset amount d, which is the amount of deviation between the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b in the traveling direction X, can be adjusted.

  FIG. 11 is a front view of the adhesion amount detection device 103. FIG. 12 is a plan view of the adhesion amount detection device 103. The adhesion amount detection device 103 detects the adhesion amount of the coating formed on the metal plate 18 that is supported by the metal plate support means 111 and the metal plate support means 111 that supports the metal plate 18 so as to be movable in the traveling direction X. An adhesion amount detection means 112.

  The metal plate support means 111 includes a first metal plate support portion 111a, a second metal plate support portion 111b that supports the metal plate 18 on the downstream side in the traveling direction X from the first metal plate support portion 111a, and a second metal plate. And a third metal plate support portion 111c that supports the metal plate 18 on the downstream side in the traveling direction X from the support portion 111b.

  The first to third metal plate support portions 111a to 111c are fixed to the installation surface 110 and a pair of pinch rolls 113 and 114 that press the metal plate 18 with a constant pressure from both sides in the thickness direction. And a roll support 115 that rotatably supports 114 around each axis. The axes of the pinch rolls 113 and 114 are horizontal and perpendicular to the traveling direction X. The pinch rolls 113 and 114 are arranged so as to be shifted with respect to the traveling direction X.

  In the first metal plate support 111 a, the pinch roll 113 on the upstream side in the traveling direction X is disposed above the metal plate 18, and the pinch roll 114 on the downstream side in the traveling direction X is disposed below the metal plate 18. In the second metal plate support portion 111 b, the pinch roll 113 on the upstream side in the traveling direction X is disposed below the metal plate 18, and the pinch roll 114 on the downstream side in the traveling direction X is disposed above the metal plate 18. In the third metal plate support portion 111 c, the pinch roll 113 on the upstream side in the traveling direction X is disposed above the metal plate 18, and the pinch roll 114 on the downstream side in the traveling direction X is disposed below the metal plate 18.

  The adhesion amount detection means 112 includes a lower adhesion amount detection unit 112a that detects an adhesion amount of a film formed on the lower surface of the metal plate 18, and a downstream side in the traveling direction X from the lower adhesion amount detection unit 112a. And an upper adhesion amount detection unit 112b for detecting the adhesion amount of the film formed on the upper surface. In the present embodiment, the adhesion amount detection position by the lower adhesion amount detection unit 112a is interposed between the support position by the first metal plate support part 111a and the support position by the second metal plate support part 111b, and the upper adhesion amount. The adhesion amount detection position by the detection unit 112b is interposed between the support position by the second metal plate support part 111b and the support position by the third metal plate support part 111c.

  In the present embodiment, since the configuration of the lower adhesion amount detection unit 112a and the configuration of the upper adhesion amount detection unit 112b are similar, the upper adhesion amount detection unit 112b will be described, and the description of the lower adhesion amount detection unit 112a will be omitted. To do.

  FIG. 13 is a front view of the upper adhesion amount detection unit 112b. The upper adhesion amount detection unit 112b is fixed to the attachment amount meter sensor head 116 facing the upper surface of the metal plate 18 and the installation surface 110, and can be displaced in the width direction of the traveling metal plate 18. A head support 117 to be supported and a head displacement driving means 118 for driving the adhesion meter sensor head 116 to be displaced in the width direction. The head displacement driving means 118 includes a servo motor 119 that is a head displacement driving source.

  FIG. 14 is a block diagram showing in detail an electrical configuration of a portion related to the upper adhesion amount detection unit 112b. The upper adhesion amount detection unit 112b includes a servo control unit 120 that controls the servo motor 119, an adhesion amount data processing unit 121 that processes a detection result by the adhesion amount sensor head 116, an adhesion amount sensor head 116, and an adhesion amount. It further includes an adhesion amount meter relay unit 122 interposed between the meter data processing unit 121. The upper adhesion amount detection unit 121b includes an adhesion amount meter sensor head 116, an adhesion amount meter relay unit 122, and a servo motor 119, and a mechanism portion 123 is configured.

  In such an upper adhesion amount detection unit 121b, the servo motor 119 is controlled by the servo control unit 120, whereby the adhesion amount sensor head 116 is displaced in the width direction. The adhesion meter sensor head 116 reciprocates repeatedly in the width direction. The displacement of the adhesion meter sensor head 116 is stopped for a predetermined time at a plurality of positions in the width direction. When the displacement of the adhesion meter sensor head 116 is stopped, the adhesion amount of the film is detected by the adhesion meter sensor head 116. The detection result by the adhesion meter sensor head 116 is given to the adhesion meter data processing unit 121 via the adhesion meter relay unit 122. The adhesion amount meter data processing unit 121 processes the detection result by the adhesion amount sensor head 116 to calculate an adhesion amount actual value. The adhesion amount actual value is, for example, an average value of detection results at each position in the width direction. The adhesion amount actual value calculated by the adhesion amount meter data processing unit 121 is given to the control device 10.

  The above-described embodiment is merely an example of the present invention, and the configuration can be changed within the scope of the present invention. The set application conditions do not necessarily include both the roll intervals of the rolls 21 to 23 and the peripheral speeds of the rolls 21 to 23, and may include only one of the two. Moreover, as an application condition to be set, the roll intervals of the rolls 21 to 23 do not necessarily include both the PT gap and the TA gap, and may include only one of the both. Further, as the application conditions to be set, the peripheral speeds of the rolls 21 to 23 do not need to include three of the peripheral speed of the P roll 21, the peripheral speed of the A roll 22, and the peripheral speed of the T roll 23. Only one or two of the parties may be included.

  The thickness dimension of each metal plate 18 forming the metal band may be different from each other. In this case, the metal plate condition includes the thickness dimension of the metal plate 18. The roll coating apparatus 1 is configured to be capable of adjusting the distance H in the thickness direction of the traveling metal plate 18 with respect to the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b, in other words, the vertical distance H. . The adjustment start position is not a coating position, but is set at a predetermined distance from the coating position, for example, 2 m, on the upstream side in the traveling direction X. When the condition change point reaches such an adjustment start position, the control device 10 is traveling the interval in the thickness direction of the traveling metal plate 18 with respect to the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b. The thickness of the metal plate 18 is sufficiently larger than the thickness of the metal plate 18, and thereafter, the interval between the rolls 21 to 23 and the peripheral speed of the rolls 21 to 23 are set. After the condition change point has passed the application position, the control device 10 determines the thickness of the metal plate 18 that is traveling with respect to the A roll 22 of the upper unit 3a and the A roll 22 of the lower unit 3b based on the thickness dimension of the metal plate 18. Set the direction interval. In this way, the treatment liquid 19 can be applied to the metal plates 18 having different thickness dimensions.

  The condition change point does not need to be a welding point, and may be set in the middle between both longitudinal ends of the metal plate 18, for example.

  The number of rolls is not limited to three. For example, the number of rolls may be two. In this case, the T roll 23 is omitted, and the treatment liquid 19 is directly supplied from the P roll 21 to the A roll 22. Even in such a case, the present invention can be applied. Further, the number of rolls may be 4 or more, and in this case, the present invention can be applied.

It is a figure which simplifies and shows the structure of the coating system 101 which is one Embodiment of this invention. It is a figure which simplifies and shows the structure of the post-processing equipment. It is a graph which shows the relationship between T roll peripheral speed ratio and Cr adhesion amount. It is a graph which shows the relationship between PT gap and Cr adhesion amount. It is a graph which shows the relationship between running speed LS and Cr adhesion amount. 5 is a flowchart for explaining an application condition adjusting operation by the control device 10; 1 is a diagram illustrating a configuration of a roll coating apparatus 1. FIG. It is a figure which shows arrangement | positioning of the pressing force detection means. It is a figure which expands and shows a part of upper unit 3a. It is a block diagram which shows the electrical structure of the part relevant to the upper unit 3a in detail. 3 is a front view of an adhesion amount detection device 103. FIG. 3 is a plan view of an adhesion amount detection device 103. FIG. It is a front view of the upper adhesion amount detection part 112b. It is a block diagram which shows the electrical structure of the part relevant to the upper adhesion amount detection part 112b in detail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roll coating device 10 Control apparatus 11 Post-processing equipment 21 Pickup roll 22 Applicator roll 23 Transfer roll 101 Coating system 102 Memory | storage device 103 Adhesion amount detection apparatus

Claims (5)

After sequentially applying the treatment liquid to the traveling metal plate, it is provided in a post-treatment facility for forming a film on the surface of the metal plate by sequentially heat-treating the traveling metal plate coated with the treatment liquid, A method of controlling a coating apparatus that applies a treatment liquid to a metal plate,
When the condition change point conditions, including running speed of the metal plate set in the metal plate is changed to pass through a coating position, the condition of the metal plate than the condition change point is set to the metal plate in the running direction upstream side Based on the condition change point , setting the application condition including at least one of the application amount per unit time, the interval between the rolls and the peripheral speed of the roll, controlling the coating apparatus and tracking the condition change point Once There passing through the adhesion amount detection position, by detecting the amount of adhered film formed on the surface of the metal plate after the heat treatment,
Calculate the rate of change of the actual amount of adhesion with respect to the target value of the amount of adhesion, and control the coating device so that when the rate of change is positive, the peripheral speed of the roll is low, and when the rate of change is negative, the peripheral speed of the roll is high. A control method for a coating apparatus. Coating apparatus, via a plurality of rolls provided in parallel close to each other, the control method of a coating apparatus according to claim 1, wherein the processing solution, characterized in that it is configured to be applied to the metal plate. The coating apparatus includes a pair of coating units that are provided to face each other via a metal plate and apply the treatment liquid to both surfaces of the metal plate,
Each coating unit has a proximity roll provided close to the metal plate, and is configured to apply the treatment liquid to the metal plate via the proximity roll.
The metal plate conditions include the thickness dimension of the metal plate,
The method for controlling a coating apparatus according to claim 1, wherein the coating condition includes an interval between adjacent rolls of each coating unit. Each time the conditions change point passes through the coating position, claim 1-3, characterized in that resetting the coating conditions based on the metal plate condition set in the metal plate in the running direction upstream side of the condition change point The control method of the coating device as described in any one of these. After the treatment liquid is sequentially applied to the traveling metal plate, the coating is provided in a post-processing facility that forms a film on the surface of the metal plate by sequentially heat-treating the traveling metal plate to which the treatment liquid has been applied. A system,
An application device configured to change the application conditions and sequentially applying the treatment liquid to the traveling metal plate;
A storage device for storing the metal plate condition set for the metal plate in association with the coating condition of the coating device;
An adhesion amount detection device for detecting the adhesion amount of the film formed on the surface of the metal plate after the heat treatment;
A control device for controlling a coating apparatus, wherein (a) a condition change point where a condition including a traveling speed of a metal plate set on a metal plate changes passes a coating direction when the condition change point passes through the application position. based on the metal plate conditions set in the upstream side of the metal plate, the coating amount per unit from the storage unit time to obtain the coating conditions including at least one spacing and roll peripheral speed of the roll was determined the (B) A film formed on the surface of the metal plate after the heat treatment by the adhesion amount detection device when the condition change point passes the adhesion amount detection position while tracking the condition change point. The rate of change of the actual amount of adhesion with respect to the target value of the amount of adhesion is calculated based on the detection result of the amount of adhesion, and when the rate of change is positive, the peripheral speed of the roll is low, and when the rate of change is negative, the roll circumference speed is increased as the coating apparatus Coating system, characterized in that it comprises a control device for controlling.

Images