JP4296589B2 - Application method and apparatus - Google Patents

Description

そして、塗布機に発生する振動と塗布段ムラ故障との関係のトリパタイト図から、９Hz未満の低周波域では振動を振幅で規定すると共に、許容基準値を０．７μｍ以下とした。また、９Hz〜１００Hzの高周波域では振動を加速度で規定すると共に、許容基準値が０．２ｇａｌになるように許容基準線を引いた。これにより、塗布操作時における塗布段ムラの発生を精度良くモニタリングすることができた。
【００３７】
【発明の効果】
以上説明したように本発明に係る塗布方法及び装置によれば、塗布機の振動による塗布ムラの発生を精度良く監視することができると共に、塗布機の土台基礎の設計において過剰設備投資にならないようにすることができる。
【図面の簡単な説明】
【図１】本発明の塗布装置の全体構成図
【図２】エクストルージョン型の塗布装置の塗布を説明する説明図
【図３】夜間定常時における塗布機のＸ軸方向の振動を示したトリパタイト図
【図４】夜間定常時における塗布機のＹ軸方向の振動を示したトリパタイト図
【図５】夜間定常時における塗布機のＺ軸方向の振動を示したトリパタイト図
【図６】車両走行時における塗布機のＸ軸方向の振動を示したトリパタイト図
【図７】車両走行時における塗布機のＹ軸方向の振動を示したトリパタイト図
【図８】車両走行時における塗布機のＺ軸方向の振動を示したトリパタイト図
【符号の説明】
１０…塗布装置、１２…ウエブ、１４…塗布機、１６…モニタリング機構、１８…塗布ヘッド、２０…移動台、２２…コーティングローラ、２４…ポケット部、２６…リップ先端、２８…スリット、３０…土台基礎、３２…ベース板、３４…レール、３６…ボールネジ、３８…位置決めダイヤル、４０…支柱、４２…軸受、４４…振動検出器（加速度センサー）、４６…コンピュータ、４８…アンプ、５０…キーボード、５２…プロット線、５４…許容基準線、５５…プリンタ、５６…スピーカ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a coating method and apparatus, and more particularly, to a coating method and apparatus capable of accurately determining the occurrence of coating unevenness due to vibration of a coating machine.
[0002]
[Prior art]
When applying a coating solution to a continuously running web with a coating machine, if the coating machine vibrates due to steady vibration from the ground or a vibration source such as peripheral equipment or construction machinery, the thickness of the coating liquid applied to the web is uneven. Uneven coating occurs. In particular, coating unevenness, which occurs in a direction perpendicular to the running direction of the web and so-called “coating step unevenness” in which the coating thickness is uneven in a stepped form, is likely to occur. Conventionally, whether or not coating unevenness has occurred has been visually monitored on the coating film surface of the web, and management of coating unevenness has been difficult. For this reason, a monitoring method has been attempted in which vibration is defined by amplitude and it is determined that coating unevenness has occurred when the amplitude exceeds a certain level.
[0003]
In addition, when designing the foundation foundation on which the applicator is mounted, the vibration of the applicator is prevented by performing anti-vibration / static vibration design. We used as data for design.
[0004]
[Problems to be solved by the invention]
However, as in the past, if the vibration is specified by amplitude and coating unevenness monitoring or the foundation foundation vibration isolation / vibration design is performed, there are monitoring effects and vibration isolation / vibration effects for low frequency vibration. For high-frequency vibrations, the monitoring effect and the vibration isolation / vibration effect of the foundation foundation are small, resulting in coating unevenness. Therefore, after the foundation foundation is constructed, it is necessary to carry out a modification work for the foundation foundation, which requires a huge amount of time and money.
[0005]
Also, if the vibration is defined only by amplitude and the foundation foundation is designed to be anti-vibration / static vibration in response to vibrations from low to high frequencies, it will result in excessive design and excessive capital investment. There is a problem.
[0006]
The present invention has been made in view of such circumstances, and can accurately monitor the occurrence of coating unevenness due to the vibration of the coating machine and avoid excessive investment in the design of the foundation of the coating machine. It is an object of the present invention to provide a coating method and apparatus capable of performing the above.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 of the present invention detects a frequency band and amplitude / speed / acceleration of vibration generated in the coating machine in a coating method in which a coating liquid is applied to a continuously running web by a coating machine. And creating a correlation between the detected frequency band and each element of the amplitude, velocity, and acceleration, and based on the created correlation, the vibration according to a frequency range from a low frequency to a high frequency of the frequency band Is selected by each of the elements, and an acceptable standard for coating unevenness caused by the vibration is set in correspondence with the element specified according to the frequency range by the selection. It is characterized in that it is managed over time using an element defined according to the frequency range whether or not an acceptable standard is exceeded.
[0008]
According to a seventh aspect of the present invention, in order to achieve the above object, in a coating apparatus that applies a coating liquid to a continuously running web with a coating machine, the frequency band and amplitude / velocity / acceleration of vibration generated in the coating machine. Vibration detecting means for detecting noise, creating means for creating a correlation between the detected frequency band and each element of the amplitude, velocity, and acceleration, and a low frequency to a high frequency in the frequency band based on the created correlation In addition to selecting which of the above elements to define the vibration according to the frequency range up to, the application unevenness caused by the vibration at the time of application corresponding to the element specified according to the frequency range by the selection Selection / setting means for setting the tolerance standard, and management means for managing over time whether or not the vibration exceeds the tolerance standard using an element defined according to the frequency range, Characterized by comprising.
[0009]
The present invention has been made on the basis of the knowledge that the influence on the coating unevenness caused by the vibration generated in the coating machine, in particular, the coating step unevenness generated in the running direction of the web is dependent on the frequency of the vibration. That is, since the factors (amplitude, speed, and acceleration) that properly define vibration differ depending on the level of vibration frequency, the application unevenness management is controlled by accurately setting the acceptable standard for occurrence of uneven coating due to vibration generated in the coating machine. For this purpose, it is necessary to select an element that defines vibration according to the level of vibration frequency, and to set an allowable reference value with the element defined by the selection.
[0010]
Therefore, according to the present invention, the frequency band and amplitude / velocity / acceleration of vibration generated in the coating machine are detected. Here, the detection does not mean that the frequency band and the amplitude / speed / acceleration are individually detected, but any one of the amplitude / speed / acceleration is measured and the other items are calculated. This includes cases where it is determined by Then, a correlation between the detected frequency band and each element of the amplitude, speed, and acceleration is created, and vibration is generated by any of the elements according to the frequency range from the low frequency to the high frequency of the frequency band from the created correlation. Whether to specify or not is set, and an acceptable standard for coating unevenness caused by vibration is set corresponding to the set element. Then, management is performed over time to determine whether or not the vibration exceeds the allowable standard by using an element defined by selection according to the frequency range of the vibration. Here, the management of coating unevenness includes management of monitoring whether or not uneven coating has occurred, and data management for designing the foundation of the coating machine.
[0011]
This makes it possible to accurately monitor the occurrence of coating unevenness due to the vibration of the coating machine, so that it is not necessary to visually inspect the coating unevenness as in the prior art. In addition, since accurate data on the relationship between vibration and occurrence of coating unevenness can be obtained, it is possible to prevent excessive capital investment in the design of the base of the coating machine.
[0013]
Moreover, as a preferable aspect of the present invention, the vibration detection of the coating machine is performed in such a manner that the X-axis direction corresponding to the web traveling direction in the horizontal direction, the Y-axis direction orthogonal to the web traveling direction in the horizontal direction, and the vertical direction. It is preferable to detect vibrations in three directions along the Z axis. As a result, it is possible to monitor the occurrence state of uneven coating due to vibration with higher accuracy and to design the foundation. In this case, in order to monitor the occurrence of uneven coating steps occurring in the web running direction, it is necessary to detect vibration in at least the X direction among the three directions.
[0014]
As a preferred embodiment of the present invention, it is preferable that the correlation is a tripartite diagram of amplitude, speed, and acceleration with respect to the frequency band of vibration.
[0015]
As a preferred embodiment of the present invention, the selection is preferably made by pattern analysis based on the plot line pattern of the created tripartite diagram. By analyzing the plot line pattern of the tripartite diagram, it is possible to easily analyze which of the three elements of amplitude, velocity, and acceleration should define the vibration in the vibration frequency range.
[0016]
Although the present invention can be applied to any coating machine, in particular, in an extrusion-type coating machine that forms a bead with a web and applies a coating solution, uneven coating is effectively managed. be able to.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a coating method and apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
[0018]
FIG. 1 is an overall configuration diagram of a coating apparatus according to the present invention.
[0019]
As shown in FIG. 1, a coating apparatus 10 according to the present invention includes a coating machine 14 that coats a web 12 that continuously travels in the direction of the arrow, and a vibration that is generated in the coating machine 14 to monitor a coating stage on the web 12. And a monitoring mechanism 16 for monitoring whether or not unevenness has occurred.
[0020]
The coating machine 14 mainly includes a coating head 18, a movable movable table 20 on which the coating head 18 is mounted, and a coating roller 22 that engages and supports the continuously running web 12.
[0021]
FIG. 2 shows coating with an extrusion type coating head as an example of a coating head. As shown in FIG. 2, the extrusion-type coating head 18 has a cylindrical pocket portion 24 parallel to the width direction of the web 12 formed therein, and communicates with the pocket portion 24 to form the coating head 18. A slit 28 reaching the lip tip 26 is formed. The coating liquid supplied to the pocket portion 24 is spread to a width corresponding to the coating width, then rises up the slit 28 and is discharged from the lip tip 26, and is engaged and supported by the coating roller 22 to continuously run. It is applied to the web 12 surface. Thereby, a coating liquid film is formed on the surface of the web 12. The web 12 on which the coating liquid film is formed is dried through a dryer (not shown).
[0022]
As shown in FIG. 1, the movable table 20 is provided on a base foundation 30 via a base plate 32, and is slidable on a pair of rails 34, 34 laid on the base plate 32 toward the coating roller 22. Supported by Further, the moving table 20 is provided with a ball screw 36 for sliding the moving table 20, and a positioning dial 38 is attached to the tip of the ball screw 36. Thereby, by rotating the positioning dial 38, the movable table 20 moves forward and backward with respect to the coating roller 22, and the clearance between the lip tip 26 of the coating head 18 and the coating roller 22 is adjusted.
[0023]
The coating roller 22 is rotatably supported on the base plate 32 by bearings 42 and 42 at the ends of a pair of support columns 40 and 40 that are provided on both sides in the web width direction of the coating head.
[0024]
Further, the coating step unevenness monitoring mechanism 16 due to vibration generated in the coating machine 14 is mainly composed of a vibration detector 44 and a computer 46 for analyzing vibration data detected by the vibration detector 44.
[0025]
The vibration detector 44 is provided on the base plate 32. In this case, the coating head 18 and the coating roller 22 mounted on the movable table 20 are integrally provided on the same base plate 32, so that the vibration generated in the coating head 18 and the coating roller 22 is the same vibration. Since it can be grasped by the two vibration detectors 44, the unevenness of the coating step due to vibration can be managed with high accuracy. As the vibration detector 44, for example, an acceleration sensor 44 that detects acceleration of vibration can be used. Hereinafter, the X axis direction corresponding to the web running direction in the horizontal direction, the Y axis direction orthogonal to the web running direction in the horizontal direction, and the acceleration for detecting accelerations of vibrations in three directions of the vertical Z axis direction An example of the sensor 44 will be described. The acceleration of vibration in the X-axis-Y-axis-Z-axis directions detected by the acceleration sensor 44 is amplified by the amplifier 48 and then input to the computer 46. On the other hand, the operator inputs data exceeding the allowable standard according to the degree of coating step unevenness among the actual occurrence data of coating step unevenness to the computer 46 by the input means such as the keyboard 50. In this case, the operator may visually determine and input the degree of unevenness of the coating step, but the captured image obtained by imaging the coating film surface coated on the web 12 with a camera (not shown). May be analyzed by an image analysis device (not shown), and coating stage unevenness data exceeding an acceptable standard may be automatically input to the computer 46.
[0026]
The computer 46 calculates a vibration velocity, amplitude, and vibration frequency band from the vibration acceleration data, and displays a tripartite diagram showing the correlation between the frequency band, each element of the amplitude, speed, and acceleration, and the acceptable standard for coating unevenness. Further, an allowable reference line 54 is set on the tripartite diagram based on the occurrence data of coating step unevenness.
[0027]
3, 4, and 5 show tripatite in a steady state at night, that is, when the applicator 14 vibrates only with steady vibration from the ground without vibration from a vibration source such as peripheral equipment or construction machinery. FIG. 3 is a vibration in the X-axis direction of the coating machine 14, FIG. 4 is a vibration in the Y-axis direction of the coating machine 14, and FIG. 5 is a tripartite diagram in the vibration of the coating machine 14 in the Z-axis direction. Since all views of the tripartite diagram are the same, FIG. 3 will be described.
[0028]
As shown in FIG. 3, the vibration plot line 52 drawn in the tripartite diagram is shown in a state in which a large number of plot lines 52 that detect vibrations generated in the coating machine 14 over time overlap. In the low frequency range of 1 to 4 Hz, it is almost right up, in the high frequency range of 30 to 100 Hz it is almost right down, and in the intermediate frequency range between the low frequency range and the high frequency range, it is almost horizontal. Draw a pattern of shapes. When this trapezoidal pattern is viewed in relation to each element of amplitude, speed, and acceleration, vibration in the low frequency range is specified by amplitude, vibration in the intermediate frequency range is specified by speed, and vibration in the high frequency range. It can be seen that the vibration can be properly grasped by specifying the acceleration. Accordingly, an allowable reference line indicating an allowable reference for coating step unevenness is also defined by an appropriate element corresponding to the frequency region among the amplitude, speed, and acceleration elements. That is, the computer 46 performs pattern analysis on the pattern of the vibration plot line 52 to select which element (amplitude, velocity, acceleration) to define the vibration according to the frequency range, and in the tripartite diagram. An allowable reference line 54 is drawn with an element corresponding to the frequency. It may be set by translating upward a pattern similar to the pattern of the plot line like the allowable reference line 54A, or ignoring the horizontal pattern in the intermediate frequency range like the allowable reference line 54B, You may set the mountain-shaped thing which combined the pattern of a low frequency range and a high frequency range. In other words, when setting the allowable reference line 54 for unevenness of coating step, it is not necessary to use all three elements of amplitude, speed, and acceleration, and it is sufficient to set with at least two of the three elements. In setting the coating step unevenness, if the amplitude is small in the low frequency range of vibration, the influence on the occurrence of the coating step unevenness is relatively small, so the allowable reference value can be lowered from the actual coating step unevenness. is there. On the other hand, in the high frequency region, even if a small amplitude has a large influence on the occurrence of uneven coating steps, it is necessary to set an allowable reference value strictly. Further, since the allowable reference line 54 is slightly different depending on the difference in coating method, the type of coating liquid, physical properties such as viscosity, etc., it is preferable to set the allowable reference line corresponding thereto.
[0029]
Then, the computer 46 draws a tripartite diagram over time from the start to the end of the coating operation, and compares the plot line 52 with the allowable reference line 54 to monitor the occurrence of coating step unevenness due to vibration, It is displayed on the printer 55. When a part or all of the plot line 52 exceeds the allowable reference line, a warning sound is emitted from the speaker 56.
[0030]
6, 7, and 8 are tripartite diagrams when the vehicle travels on the road beside the building where the applicator 14 is installed. 6 is a vibration in the X-axis direction of the coating machine 14, FIG. 7 is a vibration in the Y-axis direction of the coating machine, and FIG. 8 is a tripartite diagram in the vibration in the Z-axis direction of the coating machine.
[0031]
As can be seen from these figures, among the vibration plot lines 52 of FIGS. 6 to 8, there is a portion that exceeds the allowable reference line 54 in the low frequency range, and the computer 46 determines that the unevenness of the coating step has occurred. Beep. Further, since it is displayed on the chart paper 58 of the printer 55 that the allowable standard is exceeded, it is possible to know when the coating step unevenness has occurred at the time of application. In this case, by detecting all the vibrations of the coating machine 14 in the X-axis-Y-axis-Z-axis directions, it is possible to accurately monitor the coating step unevenness, but it is always limited to detecting the vibrations in the three directions. Instead, only the vibration in the X-axis direction, which is the direction in which the web 12 travels, may be detected.
[0032]
As described above, in the embodiment of the present invention, the acceleration of vibration generated in the coating machine 14 is measured, and the frequency band and the amplitude / speed / acceleration are obtained based on the measured acceleration. Create a tripartite diagram for grasping the relationship with each element, select which element to specify the vibration according to the frequency range from low frequency to high frequency of the frequency band from this tripartite diagram, and apply The allowable reference line 54 is set in the tripartite diagram from the state of coating step unevenness actually generated in the machine 14. And it was made to monitor whether the vibration exceeded the acceptance | permission standard using the element selected according to the frequency range of the vibration. This makes it possible to accurately monitor the occurrence of coating step unevenness due to the vibration of the applicator 14, so that it is not necessary to visually inspect the coating step unevenness as in the prior art. Accordingly, it is possible to improve the monitoring accuracy and efficiency of the coating step unevenness and reduce the labor of the operator.
[0033]
In the present embodiment, the application level unevenness monitoring during the application operation has been described. However, the present invention is not limited to this. Data collection for the foundation foundation design of the application machine 14 and other purposes are also possible. Can be used. When used to collect data for the design of the foundation foundation 30 of the coating machine 14, accurate data on the relationship between the vibration and the occurrence of unevenness in coating level can be obtained. It is possible to avoid excessive capital investment in the design.
[0034]
In the present embodiment, the coating step unevenness generated in the running direction of the web has been described. However, the present invention is not limited to this and can be applied to general coating unevenness.
[0035]
【Example】
Using the coating apparatus shown in FIG. 1, coating was performed on the continuously running web under the coating conditions shown in Table 1.
[0036]
[Table 1]

Then, from the tripartite diagram showing the relationship between the vibration generated in the coating machine and the coating step unevenness failure, the vibration is defined by the amplitude in the low frequency region below 9 Hz, and the allowable reference value is set to 0.7 μm or less. Further, in the high frequency range of 9 Hz to 100 Hz, the vibration is defined by acceleration, and an allowable reference line is drawn so that the allowable reference value is 0.2 gal. As a result, it was possible to accurately monitor the occurrence of coating step unevenness during the coating operation.
[0037]
【The invention's effect】
As described above, according to the coating method and apparatus according to the present invention, it is possible to accurately monitor the occurrence of coating unevenness due to the vibration of the coating machine, and to avoid excessive capital investment in the design of the foundation of the coating machine. Can be.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a coating apparatus according to the present invention. FIG. 2 is an explanatory diagram for explaining coating of an extrusion type coating apparatus. FIG. 3 is a tripartite showing vibration in the X-axis direction of the coating machine during normal nighttime. [Fig. 4] Tripatite diagram showing vibration in the Y-axis direction of the coater during steady nighttime. [Fig. 5] Tripartite diagram showing vibration in the Z-axis direction of the coater during steady nighttime. [Fig. FIG. 7 is a tripartite diagram showing vibration in the Y-axis direction of the coating machine during vehicle travel. FIG. 8 is a diagram of Z-axis direction of the coating machine in vehicle traveling. Tripartite diagram showing vibration 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 10 ... Coating apparatus, 12 ... Web, 14 ... Coating machine, 16 ... Monitoring mechanism, 18 ... Coating head, 20 ... Moving stand, 22 ... Coating roller, 24 ... Pocket part, 26 ... Lip tip, 28 ... Slit, 30 ... Base foundation, 32 ... base plate, 34 ... rail, 36 ... ball screw, 38 ... positioning dial, 40 ... column, 42 ... bearing, 44 ... vibration detector (acceleration sensor), 46 ... computer, 48 ... amplifier, 50 ... keyboard 52 ... Plot line 54 ... Allowable reference line 55 ... Printer 56 ... Speaker

Claims (9)

In a coating method in which a coating solution is applied to a continuously running web with a coating machine,
Detecting the frequency band and amplitude / speed / acceleration of vibration generated in the coating machine,
Create a correlation between the detected frequency band and each element of the amplitude, speed, and acceleration,
Based on the created correlation, it is selected which of the above elements to specify the vibration according to the frequency range from the low frequency to the high frequency of the frequency band, and is specified according to the frequency range by the selection. Set an acceptable standard for coating unevenness that occurs during coating due to the vibration,
An application method characterized by managing over time whether or not the vibration exceeds the acceptable standard using an element defined according to the frequency range.   The vibration detection detects vibrations in three directions, ie, an X-axis direction corresponding to the web traveling direction in the horizontal direction, a Y-axis direction orthogonal to the web traveling direction in the horizontal direction, and a vertical Z-axis direction. The coating method according to claim 1.   The coating method according to claim 1 or 2, wherein the correlation is performed by creating a tripartite diagram of amplitude, velocity, and acceleration with respect to the frequency band of the vibration.   The selection of the element is performed by pattern analysis based on the plot line pattern of the created tripartite diagram, and the setting of the tolerance standard is performed by comparing the tripatite diagram with the actual state of occurrence of coating unevenness. The coating method according to claim 3.   5. The coating method according to claim 1, wherein the management includes monitor management as to whether or not the coating unevenness has occurred, and data management for designing a base of the coating machine. .   The coating method according to claim 1, wherein the coating unevenness is a coating step unevenness that occurs in a direction perpendicular to the running direction of the web. In a coating apparatus that applies a coating solution with a coating machine to a continuously running web,
Vibration detecting means for detecting a frequency band and amplitude / speed / acceleration of vibration generated in the coating machine;
Creating means for creating a correlation between the detected frequency band and each element of the amplitude, velocity, and acceleration;
Based on the created correlation, it is selected which of the above elements to specify the vibration according to the frequency range from the low frequency to the high frequency of the frequency band, and is specified according to the frequency range by the selection. Selection and setting means for setting an acceptance standard for uneven coating caused by the vibration in response to the elements,
Management means for managing over time using an element defined according to the frequency range whether or not the vibration exceeds the acceptable standard;
A coating apparatus comprising:   8. The coating apparatus according to claim 7, wherein the creation unit, selection / setting unit, and management unit are configured by a computer.   The coating apparatus according to claim 7 or 8, wherein the coating machine is an extrusion type coating machine.

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