JP2008161758A - Applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an applicator for applying drops of a coating solution on a lengthwise substrate wound and supported by a back roll for continuous conveyance, which has no scattering of film thickness and coating non-uniformity when the arrangement of a charging head is shifted. <P>SOLUTION: In the line type applicator that is provided with the discharging head having a plurality of nozzles to discharge the drops and that applies the drops of the coating solution from the discharging head on the substrate wound and supported by the back roll to support the lengthwise substrate for continuous conveyance, it is characterized by having a detection means for detecting the injection performance of the drops injected from a plurality of nozzles. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a coating apparatus for forming a coating film on a long support that is continuously transported using a droplet discharge method based on an inkjet method, and more specifically, from a pattern formed by ejected droplets, The present invention relates to a coating apparatus provided with a detecting means for detecting droplet ejection performance.

  A method of forming an image using an ink jet coating method and forming a continuous film and a patterned coating film are generally known.

  An ejection head (hereinafter also referred to as an inkjet head) used in an inkjet coating method has a plurality of ink ejection nozzles, and forms a desired image or coating film by ejecting droplets onto a support based on print data. To do.

  Hereinafter, ink is synonymous with coating liquid, and printing is synonymous with coating.

  As a method of applying the above-mentioned image or coating film to a wide support, a method of applying the discharge head by moving the discharge head in the transport direction or the width direction of the support, and a plurality of discharge heads in the support width direction. A method of arranging and applying is known.

  When a plurality of discharge heads are disposed in the support width direction as described above for coating, and when a continuous coating film is formed by discharging the same type of coating liquid from a plurality of discharge heads, a plurality of discharge heads are disposed. In addition, if the distance between each nozzle of the ejection head and the support is different, the diameter of the ejected droplets upon landing on the support will be different, resulting in variations in coating film thickness and uneven coating. Such a problem arises. In order to form a coating film having a uniform film thickness on the support, it is important to maintain a constant distance between each of the nozzles of the plurality of ejection heads and the support.

  In addition to this, for the adjustment of the ejection heads related to coating unevenness, the inclination of the nozzle row of each ejection head with respect to the coating width direction (direction perpendicular to the coating direction), or a plurality of ejection heads arranged in the coating width direction When this is done, the connection of the nozzle spacing between the heads is also related to the coating unevenness.

  In a recording apparatus that performs image recording by scanning a plurality of recording heads relative to a recording medium (support), for example, with respect to a positional deviation of the recording head, the plurality of recording heads are arranged. The recording information recorded by the recording heads (inkjet heads) is read, the positional deviation of each recording head is detected according to the position of the read recording information, and the positions of the plurality of recording heads are determined according to the detected positional deviation. It is shown to adjust (for example, refer to Patent Document 1).

However, in Patent Document 1, the position of the recording head in the conveyance direction and the width direction of the support can be adjusted, but the adjustment of the inclination of the ejection head nozzle surface (distance between each nozzle and the support) and the application width direction of the recording head It is not possible to adjust the inclination with respect to the angle, and there is a possibility that it is not possible to cope with a deviation in these.
JP-A-5-234004

  The present invention has been made in view of the above situation, and is a coating apparatus that performs coating by discharging droplets of a coating liquid onto a support of a long support that is wound around and supported by a back roll. In the above, an object of the present invention is to provide a coating apparatus in which there is no possibility of variations in coating film thickness and uneven coating due to the displacement of the ejection head.

  The above object of the present invention is achieved by the following means.

  1. An ejection head having a plurality of nozzles for ejecting liquid droplets, and a coating liquid is applied from the ejection head onto the support that is wound around and supported by a back roll that supports a long support that is continuously conveyed. A line-type coating apparatus that performs coating by discharging droplets, the coating apparatus including a detecting unit that detects ejection performance of droplets ejected from the plurality of nozzles.

  2. The discharge head has a nozzle opposed to the support supported by the back roll, the nozzle is disposed in the width direction in a direction perpendicular to the transport direction of the support, and is movable relative to the back roll. 2. The coating apparatus according to 1 above, wherein the coating apparatus is disposed on the surface.

  3. The plurality of discharge heads are arranged in a staggered manner in the nozzle arrangement direction, and the discharge directions of the droplets from the plurality of discharge heads arranged in the staggered form are substantially the center of rotation of the back roll. 3. The coating apparatus according to 2 above, wherein the coating apparatus is a direction.

4). The discharge head is movable in a substantially vertical direction and a substantially parallel direction with respect to a tangent line having a contact point in the vicinity of the nozzle on the support supported by the back roll;
It is movable in the circumferential direction of the back roll, and supports a line drawn in a direction perpendicular to the transport direction of the support when the nozzle array of the ejection head is projected onto the support. The inclination (angle) of the line segment constituted by the nozzle row projected onto the body can be adjusted, and the support body is supported by the back roll at both ends of the nozzle row. The coating apparatus according to 2 or 3 above, wherein the distance up to is freely movable.

  5. A first stage independent for each ejection head holding the ejection head, a second stage independent for each first stage holding the first stage, and the second stage are collectively held. A third stage, and the first stage supports the discharge head in a direction substantially perpendicular to a tangent line having a contact point in the vicinity of the nozzle on the support supported by the back roll. The discharge head is movable in the width direction of the body, and the discharge head is held at both ends of the nozzle row so that the distance to the support supported by the back roll is movable. When the first stage holding the head is movable in the substantially circumferential direction of the back roll and the ejection head projects the nozzle row of the ejection head onto the support, With respect to the line drawn in the direction orthogonal to the feed direction, the inclination (angle) of the line segment constituted by the nozzle row projected onto the support is held in an adjustable manner, and the third stage is The point where the normal line of the back roll passing through the approximate center of the line segment connecting the nozzles of the plurality of ejection heads arranged in a staggered manner intersects the support at the same time as the second stage. The coating apparatus according to 3 or 4, wherein the coating apparatus is held so as to be movable in a substantially vertical direction and a substantially parallel direction with respect to a tangent line.

  6). 6. The coating apparatus according to 5 above, wherein each of the first stage, the second stage, and the third stage includes a movement amount display unit that allows the movement amount to be visible.

  7. A dummy application is performed before the actual application is started, a dummy application state is detected by the detection unit, and a calculation unit that calculates a difference from a preset dummy application pattern is provided. Based on the calculated results, 2. The coating apparatus according to 1 above, further comprising a calculation unit that calculates an adjustment margin for adjusting the positional relationship of the ejection head.

  8). 8. The coating apparatus according to 7, wherein the dummy coating is a dot pattern coating, and droplets ejected from adjacent nozzles are not connected to each other, and the dummy coating is performed by forming an independent dot shape. .

  9. The detection means for detecting the dummy application state is an image pickup device, and the image pickup device moves in a direction perpendicular to the direction in which the support is transported to detect the dot pattern, and the presence / absence of undischarged nozzles. 9. The coating apparatus according to item 8, further comprising display means for detecting and displaying a result of the calculation and a head having an undischarged nozzle.

  Application of a droplet discharge method in which a liquid droplet of a coating solution is discharged from a discharge head onto a support of the support that is wound around and supported by a back roll that supports a continuous long support. A detecting means for detecting the ejection performance of the liquid droplets ejected from the ejection head, and adjusting the mounting position and angle of the ejection head with respect to the back roll to adjust the ejection direction of the liquid droplets from the nozzle, the nozzle By maintaining the position appropriately, it is possible to provide a coating apparatus that does not cause a variation in the thickness of the coating film and uneven coating.

  Hereinafter, the best mode for carrying out the present invention will be described in detail.

  The present invention comprises a discharge head having a plurality of nozzles for discharging droplets, and is wound on and supported by a back roll that supports a long support that continuously conveys the support. This is a line type coating apparatus that performs coating by discharging droplets of a coating liquid from a discharge head. In addition, the coating apparatus includes a detecting unit that detects ejection performance of droplets ejected from a plurality of nozzles of the ejection head.

  The detection means is, for example, an imaging means for performing dummy application before starting actual application and detecting the dummy application state, thereby calculating a difference from a preset dummy application pattern, and based on the calculated result. A calculation means for calculating an adjustment margin for adjusting the positional relationship among the plurality of ejection heads is provided.

(Preferred embodiment)
The preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a coating apparatus 1 according to the present invention.

  The long support 10 wound in a roll shape is fed out in the direction of the arrow X from the unwinding roll 10A by a driving means (not shown) and conveyed.

  The long support 10 is wound around and supported by the back roll 12 and conveyed, and the ink of the coating liquid is discharged from the ink jet head (discharge head or simply referred to as head) of the ink jet unit 20 and applied to the support 10. The

  The ink jet unit 20 includes an ink jet head 21 (for example, 211, 212, 213), a first stage 22, a second stage 23 and a third stage 24 that hold the ink jet head, an ink tank 25, and a head driving unit 26. Composed. As the ink jet head 21 (211 212, 213), a generally known ink jet head can be used.

  Further, an image pickup device (camera) 30 for photographing an ink dot pattern ejected on a support conveyed prior to actual application from an inkjet head is used as a detection means, and a display means 27 for displaying a calculation result. It has. The imaging device detects the ink dot pattern by moving in a direction orthogonal to the direction in which the support is conveyed.

  The head driving unit 26, the imaging device 30 for detecting the head position information of each ejection head, and the display unit 27 are controlled by a control unit 100 including a CPU 101, a memory 102, a storage device 103, and the like.

  The imaging device performs a dummy coating on the support before starting the actual coating, and then moves in a direction perpendicular to the direction in which the support is transported to capture the state of the dummy coating and is ejected from a plurality of nozzles. Detecting the ejection performance of the liquid droplets. The CPU 101 also checks the dummy application pattern imaging data on the support with the appropriate dummy application pattern held in the memory or the storage device, and based on this, a plurality of ejections to be described later Adjust the position of the adjustment mechanism, such as a micrometer, for positioning and controlling and adjusting the head positional relationship, head direction of each discharge head, distance between the nozzle and support, etc. to the proper position. It calculates and displays this on a display means. Appropriate application is performed by adjusting the head position and posture with a micrometer or the like based on the calculation result.

  The dummy application is preferably a dot pattern application in order to know the position of each nozzle, and is performed so that droplets ejected from adjacent nozzles are not connected to each other and form independent dot shapes.

  Further, the memory and the storage device hold appropriate dot pattern data for collating imaging data with the memory, and also make it possible to hold and use various data such as a dot pattern formation history by the imaging device. Good.

  FIG. 2 is a perspective view illustrating an example of a schematic configuration of an arrangement of a plurality of inkjet heads. In the example shown in FIG. 2, there are three inkjet heads in a staggered arrangement. The three inkjet heads 211, 212, and 213 are combined to form an inkjet head having a predetermined length. The joint of application of each inkjet head is arranged so that the nozzles 211A and 212A and 212A and 213A of each inkjet head overlap.

  The inkjet heads 211, 212, and 213 are heads having a predetermined length, and are disposed at positions facing the back roll 12 with the support 10 interposed therebetween. Ink (application liquid) is ejected from the nozzles 211A, 212A, and 213A toward the center of rotation of the back roll and applied to the support 10. In FIG. 2, the number of the ink jet heads is three. However, the number of the ink jet heads is not limited to this, and may be appropriately determined depending on the width of the head and the coating width. What is necessary is just the position which pinches | interposes the support body 10 and opposes the back roll 12. FIG.

  The support 10 on which the coating film has been formed is dried by the drying unit 50 and wound around the winding roll 10B.

  Next, an example of the position adjustment of the ejection head for keeping the application properly will be described by taking the arrangement of the inkjet head shown in FIG. 2 as an example.

  FIG. 3 shows an example of the dot pattern formed on the support by disposing the ejection head and applying the dummy. For convenience, two ejection heads 211 and 212 are shown.

Attention is paid to the dots ejected from the nozzles at both ends of the ejection head in the dot pattern formed on the support by the ejection head 211. _Let the diameter of the leftmost dot in the drawing be φD _1-1, and pay attention to the diameter φD _1-n of the dot discharged from the nozzle at the opposite end.

When the nozzle surface of the head is inclined with respect to the application surface, the landing distance of the liquid droplets discharged from the nozzles at both ends of the head to the application surface (support) is changed. When this distance is long, a difference occurs in the drying time of the droplets, and there is a phenomenon that a minute difference occurs in the diameter when the droplets land. That is, when the distance is short, the diameter is large, and when the distance is long, the diameter is small. For example, when in FIG. 3 (a) φD _1- 1 of <φD _1-n, an ink jet head of FIG. 4, the nozzle surface of the inkjet head as shown in a positional relationship of the coated surface (support) whereas the coated surface Inclined, the distance from the leftmost nozzle in the figure to the application surface is farther than at the nozzle at the opposite end of the same head.

Accordingly, when attention is paid to φD _1-1 and φD _1-n , if the sizes are different, the ejection head nozzle surface is inclined with respect to the application surface.

If the correlation between the previously formed dot diameter and the distance between the nozzle and the surface to be coated (support) is held as data, the distance from the numerical values of the dot diameters φD _1-1 and φD _1-n to the nozzle surface The correction value can be calculated with respect to the inclination of the inkjet head 211.

As shown in FIG. 3, when the diameters of the dots formed by the droplets ejected from the nozzles at both ends of the head 211 are φD _1-1 and φD _1-n , the nozzles at both ends of the head and the surface to be coated (supported) Can be calculated as h _1-1 and h _{1-n. If} there is no difference in dot diameter, they are equal, but if there is a difference, each nozzle and the surface to be coated (support) It is possible to compare and compare the distances h _1-1 and h _1-n with appropriate values held in a memory or a storage device to calculate correction values (adjustment margins) of the respective adjustment mechanisms. By adjusting the head position based on such calculation, the inclination of the nozzle surface with respect to the application surface can be corrected.

  Therefore, all nozzles are ejected to form a dot pattern before the start of actual application. The dot pattern is taken into an imaging device, for example, an ultra-high-speed digital multi-camera CV = 300 manufactured by Keyence Corporation, the dot diameter is calculated, the dot diameters at both ends of the nozzle of the same ejection head are compared, The distance between both ends indicating the inclination of the vertical direction (the gap between the head and the support) is calculated.

From the image dot diameters φD _1-1 and φD _{1-n of} the ejection head (for example 211) imaged by the imaging means, and from the image dot diameters φD _2-1 and φD _{2-n of} the ejection head 212, h _1-1 , h _1-n , and h _2-1 , h _2-n are obtained, and based on this, the position adjustment means of the discharge head described later, that is, the discharge head is arranged at both ends of the nozzle row. An adjustment margin of the adjustment means that enables movement of the distance to the surface to be coated (support) is obtained.

  The calculation result is displayed on the display means, and the inclination of the nozzle surface of each head with respect to the application surface (support) can be adjusted by moving the adjustment means using the calculation result. As the display means, for example, various display devices can be used, and launching by a printer or the like may be used.

  FIG. 3B shows another example of a dot pattern in dummy application before the start of actual application. In this example, the nozzle array of the ejection head is inclined with respect to the coating direction, and when the nozzle array is projected onto the surface to be coated (support), the nozzle array is pulled in a direction perpendicular to the transport direction of the support. The line segment formed by the nozzle row projected onto the support is inclined with respect to the line segment. In the ejection head 211, this inclination is shifted L1 at the rightmost end of the head and L2 in the ejection head 212. Further, when the lengths of the nozzle rows of the respective ejection heads are A1 and A2, the width between the nozzles at both ends is reduced to be asymmetrically a1 and a2, respectively. The inclination of each head nozzle row in the coating direction is adjusted by L1, L2, and a1, a2, and the adjustment margin of the adjusting means is calculated so that a1, a2 are regular A1, A2.

  An adjustment mechanism that calculates the phase difference between both ends of the nozzle with respect to the coating direction and controls the tilt of the head with respect to the coating direction will be described later.

  In addition, as the position control of the ejection head, after the above adjustment, b is calculated after adjustment in the dot pattern in the dummy application before the actual application start in FIGS. Adjust to distance B (coating direction).

  Similarly, t is calculated to adjust the normal inter-head distance T (application width direction).

  Further, as shown in FIG. 3C, the distance between adjacent dots la and lb of all the dots is calculated from the dot pattern of the dummy application, and it is also possible to determine which head has the non-ejection nozzle. I can do it. For example, when the distance between adjacent dots exceeds ± 20% of a predetermined numerical value, it is determined that the nozzles between them are not ejected, and these are also preferably displayed on a monitor or the like.

  After the calculation is performed, it is preferable that the adjustment margin values of these adjusting means for controlling the position and posture of each head are displayed on the display means (monitor). If the head position is adjusted by each micrometer based on these, each ejection head can be arranged at the optimum position.

  These adjusting means (mechanisms) are arranged on the first stage, the second stage, and the third stage that hold the ejection head, but the amount of movement is displayed in a visible manner so that the adjustment margin can be clearly defined. For example, a means such as a micrometer is preferable.

  Next, a moving / adjusting mechanism for controlling the ink jet head position and posture will be described.

  FIG. 5 is a schematic side view showing the inkjet head and the movement adjustment mechanism of the inkjet head. 6 is a plan view seen from the direction of the arrow g in FIG. 5, and FIG. 7 is a partial view of the ink jet heads 211, 212, and 213, the first stage 22 and the second stage 23 that are independent for each ink jet head. FIG. 7 (a) is a side view and FIG. 7 (b) is a plan view.

  The ink jet heads 211, 212, and 213 and the first stage 22 and the second stage 23 independent for each ink jet head are different in arrangement position and direction, and have the same mechanism. Will be described only for the inkjet head 211.

The first stage 22 is composed of a slide member 221, micrometer m _1-1, m _1-2 and m _2. The second stage 23 includes a slide member 231 and micrometers m _3-1 and m _3-2 . The third stage 24 includes a base 241, slide members 242 and 243, and micrometers m ₄ and m ₅ . Micrometer _{m 1-1, m 1-2, m 2} , m 3-1, m 3-2, m 4 and m ₅ are micrometer moves the slide member by rotating the knob of the micrometer The amount of movement can be read by the scale on the mark.

The inkjet head 211 is joined to the slide member 221 so as to be movable. The micrometers m _1-1 and m _1-2 represent the inkjet head 211 with respect to the tangent line S1 having a contact point in the vicinity of the nozzle on the support supported by the back roll with respect to the slide member 221, or the support surface. In contrast, it is moved in a substantially vertical direction (arrow y1 direction).

The micrometers m _1-1 and m _1-2 can be adjusted independently. By changing the respective adjustment amounts, the inclination of the discharge head nozzle surface with respect to the support surface, that is, the nozzles at both ends of the head can be adjusted. The distance to the coating surface (support) (said h _1-1 , h _1-n ) can be adjusted. The respective distances are calculated by the control unit 100 having the CPU 101, the memory 102, and the storage device 103 from the dot diameter data obtained by photographing the dot pattern printed on the support by dummy coating with the imaging device. Each adjustment margin is calculated by collating with appropriate data to be held, and this is displayed on a monitor, for example. Although not shown here, the micrometer can be driven using a driving mechanism such as a driver or a motor based on the calculated adjustment margins.

The slide member 221 is movably joined to the slide member 222. The micrometer m ₂ moves the slide member 221 with respect to the slide member 222 in the width direction of the support (the direction of the arrow y2). Thereby, the inkjet head 211 can be moved in the width direction (arrow y2 direction) of the support.

The slide member 222 is movably joined to the slide member 231. The micrometers m _3-1 and m _3-2 move the slide member 222 with respect to the slide member 231 in the substantially circumferential direction of the back roll (arrow y3 direction). As a result, the first stage 22 holding the inkjet head 211 can be moved in the substantially circumferential direction of the back roll (in the direction of the arrow y3), and at the same time, the micrometers m _3-1 and m _3-2 are independent. By driving in this manner, it is possible to adjust the inclination of the ejection head nozzle row with respect to the application width direction, that is, the deviations L1 and L2 with respect to the application width direction of the dots by the nozzles at both ends of the head shown in the dummy application dot pattern.

  By attaching the slide member 231 to the slide member 243, the second stage 23 holding the inkjet head 211 and the first stage 22 is attached to the third stage 24. Similarly, the second stage 23 related to the inkjet heads 212 and 213 is also attached to the third stage 24.

In this way, the heads are moved in the y1 direction by the micrometers m _1-1 and m _1-2 to adjust the inclination with respect to the coated surface (support).

Further, the head tilt in the coating direction is moved in the y3 direction by the micrometers m _3-1 and m _3-2 by L1, L2 and a1, a2 shown in the dummy coating dot pattern to be normal A1, A2. Can be adjusted.

Further, b shown in these post-adjustment dummy application dot patterns is calculated, and both the micrometers m _3-1 and m _3-2 are moved by the same adjustment distance between the heads. Adjust to (application direction).

Similarly, t after the adjustment is calculated and adjusted by the micrometer m ₂ so as to be a normal head-to-head distance T (application width direction) in the y2 direction.

As another head position adjusting mechanism, there is provided means for adjusting the position of the entire second stage. According to this, the slide member 243 is joined to the slide member 242 so as to be movable. The micrometer m ₄ is configured such that the normal line of the back roll passing through the approximate center of the line segment connecting the slide members 243 and the nozzles of the plurality of ejection heads arranged in a staggered manner with respect to the slide members 242 and the support member. It is moved in a substantially vertical direction (arrow y4 direction) with respect to the tangent line S2 having the intersecting point as a contact point.

The slide member 242 is joined to the base 241 so as to be movable. The micrometer m ₅ moves the slide member 242 in a substantially parallel direction (arrow y5 direction) with respect to the tangent S2 with respect to the base 241. Accordingly, the inkjet heads 211, 212, and 213 attached to the third stage 24 via the first and second stages 22 and 23 are collectively perpendicular to the tangent line S2 (in the direction of the arrow y4). And in a substantially parallel direction (arrow y5 direction).

  For joining the slide members, a generally known linear guide mechanism such as a slide rail or a linear guide (not shown) can be used. In addition, the inkjet head and the slide member that have been adjusted for movement can be performed by a generally known clamp, screwing, or the like (not shown).

  The head position is controlled using these adjustment mechanisms, and the adjustment margin of each adjustment means calculated based on the dot pattern obtained by the dummy application is the first to third after each calculation. Each stage is displayed on the monitor.

  Further, the above-mentioned non-ejection nozzle detection result can also be displayed on the monitor.

  As a display means for displaying these results, there are various monitors such as a CRT, a liquid crystal monitor, etc., and they may be printed out by a printer or the like.

  The head position can be adjusted by the adjustment margin of each displayed adjustment means, but this is transmitted to each micrometer based on the adjustment margin of each adjustment means displayed, and is generally known. The head position and orientation may be controlled by driving using a driver and a motor.

  In addition, the movement of the slide member and the display of the amount of movement described above are a micrometer in which the amount of movement is displayed in a visible manner in the present embodiment, but the movement may be performed by an electrically driven moving means. In addition, the movement amount can be displayed on an electronic display device by detecting the movement amount with a known electronic displacement meter.

  The flow of head position adjustment is shown in FIGS. 8 and 9 for the inclination of each head with respect to the application surface (support) and the inclination of the head in the application direction. Here, the inclination of the ejection head nozzle surface with respect to the support surface and the inclination of the ejection head nozzle row with respect to the coating width direction and the individual flow are shown, but all the adjustment amounts of each stage 1 to 3 are continuously (or parallel). It is preferable to display the results collectively.

  According to the present invention, coating is performed by discharging droplets of the coating liquid from the discharge head onto the support of the support that is wound around and supported by the back roll that supports the long support that is continuously conveyed. In the application of the droplet ejection method, by using means for detecting the ejection performance of droplets ejected from a plurality of nozzles of the ejection head, the head position can be easily adjusted, and the application state is kept optimal, It is possible to perform coating without uniform coating unevenness.

  In addition, a conventional coating device for a continuous conveyance body provided with a head adjustment mechanism is provided with a plurality of nozzles that cover the coating width of a support with one head, but the nozzle is discharged due to clogging or the like. If a failure due to a failure occurs, the entire head must be replaced. Such a wide head has a low yield during head production and is very expensive. If the head is replaced every time one nozzle fails, the running cost becomes very expensive. On the other hand, in a coating apparatus in which a plurality of heads are arranged in a staggered manner in the width direction of the coating, even if one nozzle fails, it is only necessary to replace the failed head. There is an effect that it can be kept cheap.

It is a schematic diagram which shows the structure of the coating device which concerns on this invention. It is a perspective view which shows an example of schematic structure of arrangement | positioning of an inkjet head. It is a figure which shows the example of the dot pattern formed on the support body by performing arrangement | positioning of a discharge head, and dummy application | coating. It is a figure which shows the positional relationship of a discharge head and a to-be-coated surface (support body). It is a schematic side view which shows the movement adjustment mechanism of an inkjet head and an inkjet head. It is a schematic plan view which shows the movement adjustment mechanism of an inkjet head and an inkjet head. FIG. 4 is a partial view showing a side surface and a plane of an independent first stage and second stage for each inkjet head. The flowchart of inkjet head position adjustment is shown. The flowchart of inkjet head position adjustment is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Application | coating apparatus 10 Support body 12 Back roll 20 Inkjet unit 21, 211, 212, 213 Inkjet head 21A, 211A, 212A, 213A Nozzle 22 First stage 221, 222 Slide member 23 Second stage 231 Slide member 24 Third 241 base plate of the stage 242 and 243 slide member 25 ink tank 26 the head drive unit 50 drying unit _{m 1-1, m 1-2, m 2} , m 3-1, m 3-2, m 4, m 5 micrometers

Claims (9)

An ejection head having a plurality of nozzles for ejecting liquid droplets, and a coating liquid is applied from the ejection head onto the support that is wound around and supported by a back roll that supports a long support that is continuously conveyed. A line-type coating apparatus that performs coating by discharging droplets, the coating apparatus including a detecting unit that detects ejection performance of droplets ejected from the plurality of nozzles. The discharge head has a nozzle opposed to the support supported by the back roll, the nozzle is disposed in the width direction in a direction perpendicular to the transport direction of the support, and is movable relative to the back roll. The coating apparatus according to claim 1, wherein the coating apparatus is disposed on the surface. The plurality of discharge heads are arranged in a staggered manner in the nozzle arrangement direction, and the discharge directions of the droplets from the plurality of discharge heads arranged in the staggered form are substantially the center of rotation of the back roll. The coating apparatus according to claim 2, wherein the coating apparatus is a direction. The discharge head is movable in a substantially vertical direction and a substantially parallel direction with respect to a tangent line having a contact point in the vicinity of the nozzle on the support supported by the back roll;
Being movable in the circumferential direction of the back roll,
When the nozzle array of the ejection head is projected onto the support, the nozzle array is projected onto the support with respect to the line drawn in the direction orthogonal to the transport direction of the support. The inclination (angle) of the line segment is adjustable,
as well as,
The discharge head is movable at the both ends of the nozzle row, and the distance to the support supported by the back roll is freely movable;
The coating apparatus according to claim 2 or 3, wherein A first stage independent for each ejection head holding the ejection head, a second stage independent for each first stage holding the first stage, and the second stage are collectively held. And a third stage to
The first stage is capable of moving the ejection head in a direction substantially perpendicular to a tangent line having a contact in the vicinity of the nozzle on the support supported by the back roll and in the width direction of the support; and
The discharge head is held at both ends of the nozzle row so that the distance to the support supported by the back roll is movable,
The second stage can move the first stage holding the ejection head in a substantially circumferential direction of the back roll, and
The ejection head is projected onto the support with respect to a line drawn in a direction orthogonal to the transport direction of the support when the nozzle row of the ejection head is projected onto the support. Holds the inclination (angle) of the line segment composed of the nozzle rows in an adjustable manner,
In the third stage, the normal of the back roll passing through the approximate center of the line segment connecting the nozzles of the plurality of ejection heads arranged in a staggered manner together with the second stage is the support. Hold movably in a substantially vertical direction and a substantially parallel direction with respect to a tangent line having a point of intersection as a contact point,
The coating apparatus according to claim 3 or 4, wherein The coating apparatus according to claim 5, further comprising a movement amount display unit that makes the movement amount visible to each of the first stage, the second stage, and the third stage. A dummy application is performed before the actual application is started, a dummy application state is detected by the detection unit, and a calculation unit that calculates a difference from a preset dummy application pattern is provided. Based on the calculated results, The coating apparatus according to claim 1, further comprising a calculation unit that calculates an adjustment margin for adjusting the positional relationship of the discharge head. 8. The coating according to claim 7, wherein the dummy coating is a dot pattern coating, and the droplets ejected from adjacent nozzles are not connected to each other, and the dummy coating is performed by forming an independent dot shape. apparatus. The detection means for detecting the dummy application state is an image pickup device, and the image pickup device moves in a direction perpendicular to the direction in which the support is transported to detect the dot pattern, and the presence / absence of undischarged nozzles. The coating apparatus according to claim 8, further comprising a display unit configured to detect and display a result of the calculation and a head having an undischarged nozzle.

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