Coating device and method for determining liquid material
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- FUJI CORP
- Filing Date
- 2025-01-22
- Publication Date
- 2026-07-30
Smart Images
Figure JP2025001948_30072026_PF_FP_ABST
Abstract
Description
Coating device and method for determining liquid material
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[0001] This specification discloses a coating device and a method for determining a liquid material.
[0002] Conventionally, there has been proposed a method of capturing an image of an object such as a substrate to check for the presence or absence of foreign matter. For example, in the device of Patent Document 1, a master substrate is imaged in a state where a plurality of light source colors are irradiated individually to obtain a reference image, and then a substrate to be measured is imaged in a state where a plurality of light source colors are irradiated individually to obtain a measurement image. Then, the presence or absence of foreign matter is confirmed by comparing the difference between the integrated image of the reference images for each light source color and the integrated image of the measurement images for each light source color.
[0003] Japanese Patent Translation of PCT International Publication No. 2016-519768
[0004] By the way, in a coating device that applies a liquid material to an object such as a substrate, when an operator replaces a storage member that stores the liquid material, there is a case where a storage member storing a different type of liquid material from the required liquid material is erroneously attached. In that case, a different type of liquid material from the liquid material that should originally be used may be applied as it is, which may cause product defects.
[0005] The main object of the present disclosure is to determine the suitability of a liquid material and prevent coating defects.
[0006] In the coating apparatus of this disclosure, the liquid material applied to the coating section is processed by an image captured by the imaging section to obtain a determination value for the color information of the liquid material. Then, based on the reference value of the color information of the liquid material in the image and the obtained determination value, a determination process is performed to determine whether the liquid material contained in the storage member is suitable or not. This makes it possible to prevent product defects caused by applying different types of liquid materials.
[0009] A schematic diagram showing the configuration of the mounting apparatus 10 including the coating apparatus of this disclosure. A block diagram showing the configuration of the mounting apparatus 10. A flowchart showing an example of the reference value registration process. An explanatory diagram showing an example of the reference value registration process. An explanatory diagram showing an example of the reference value information 63a. A flowchart showing an example of the liquid material suitability determination process. An explanatory diagram showing an example of the liquid material suitability determination process.
[0010] Embodiments of this disclosure will be described with reference to the drawings. Figure 1 is a schematic diagram showing the configuration of a mounting apparatus 10 including a coating apparatus of this disclosure. Figure 2 is a schematic block diagram showing the configuration of the mounting apparatus 10. In this embodiment, the left-right direction (X-axis), front-back direction (Y-axis), and up-down direction (Z-axis) are as shown in Figure 1.
[0011] The mounting device 10 includes a component supply device 12, a substrate transport device 14, a moving device 20, a head (coating head) 30, a mark camera 40, a parts camera 45, a coating check unit 50, a display operation panel 55, and a control device 60. The component supply device 12 is, for example, a tape feeder equipped with a reel containing components at predetermined intervals on a tape, and pulls the tape from the reel and supplies the components to the supply position by the drive of a motor (not shown). Although not shown, each tape feeder is detachably attached by inserting rail members into each of a plurality of slots formed in the feeder stand. The substrate transport device 14 includes, for example, a pair of conveyor belts provided at intervals in the front-to-back direction (Y-axis direction) and stretched across the left-to-right direction, and transports the substrate S from left to right in Figure 1 by driving the conveyor belts by the drive of a motor (not shown). The moving device 20 includes a guide rail 23 provided along the Y-axis direction, a Y-axis slider 24 that moves along the guide rail 23, a guide rail 21 provided on the Y-axis slider 24 along the X-axis direction, and an X-axis slider 22 that moves along the guide rail 21. A head 30 is attached to the X-axis slider 22. The moving device 20 moves the head 30 in the XY direction by moving the X-axis slider 22 and the Y-axis slider 24 by driving motors (not shown). The display operation panel 55 is configured as a touch panel type liquid crystal display that can be operated by the operator. This display operation panel 55 displays various information such as work instructions to the operator and accepts input operations such as various settings and various instructions. Note that the display device and the input device may be provided separately.
[0012] Furthermore, the mounting device 10 is equipped with a mounting head 30 for mounting components supplied by the component supply device 12, and a coating head (glue head) for applying liquid materials such as glue to the substrate S. The mounting head has a suction nozzle for picking up components, and is configured to apply negative pressure to the suction nozzle when picking up components and positive pressure when mounting the picked-up components to the substrate S. Mounting heads can also include heads with one suction nozzle and rotary heads with multiple suction nozzles arranged to move circumferentially. Examples of liquid materials applied by the coating head include glue (adhesive), solder paste, and conductive paste. In this embodiment, the coating head 30 will be used as an example for explanation.
[0013] The application head 30 comprises a syringe 32, a discharge nozzle 34, a detachable member 36, and a Z-axis slider 38. The syringe 32 is a cylindrical member containing a liquid material such as glue. The discharge nozzle 34 is connected to the lower end of the syringe 32 and discharges the liquid material supplied from the syringe 32. The application head 30 is configured to apply positive pressure to the syringe 32 when discharging the liquid material and negative pressure to the syringe 32 when stopping the discharge of the liquid material. The detachable member 36 is a substantially flat member, for example, whose rear side is detachably attached to the X-axis slider 22. The Z-axis slider 38 is provided on the front of the detachable member 36 so as to be slidable in the vertical direction and holds the syringe 32 and the discharge nozzle 34. The syringe 32 can be replaced by, for example, an operator on the application head 30 (Z-axis slider 38). Therefore, the coating head 30, with a syringe 32 containing the type of liquid material to be applied attached, dispenses the liquid material from the discharge nozzle 34 onto the object to be coated.
[0014] The mark camera 40 is located on the lower surface of the X-axis slider 22 and moves in the XY direction together with the coating head 30 by the moving device 20 to image the object to be imaged from above. Examples of objects to be imaged include parts supplied by the parts supply device 12, marks attached to the substrate S, parts mounted on the substrate S, and liquid materials applied to the substrate S or the coating check unit 50. The mark camera 40 comprises a light source unit 42 and a camera body 44.
[0015] The light source unit 42 is equipped with an equal or approximately equal number of red LEDs 42a that emit red monochromatic light, blue LEDs 42b that emit blue monochromatic light, and green LEDs 42c that emit green monochromatic light. The light source unit 42 can illuminate the red LEDs 42a, blue LEDs 42b, and green LEDs 42c individually. The camera body 44 is equipped with an optical system such as a lens (not shown) and a monochrome image sensor, such as a monochrome CCD. The camera body 44 receives the light emitted from the light source unit 42 and reflected by the object to be imaged with the monochrome CCD to generate a monochromatic image and outputs the generated image to the control device 60.
[0016] The parts camera 45 is positioned, for example, between the parts supply device 12 and the substrate transport device 14, and captures images of the object to be imaged from below. As the mounting head passes above, the parts camera 45 captures images of the parts held by the suction nozzle from below and outputs the images to the control device 60.
[0017] The coating check unit 50 is a box-shaped unit, for example, located to the side of the parts supply device 12 (tape feeder), and has a test-pressing area A exposed above. Although not shown in the illustration, the coating check unit 50 is detachably attached by inserting rail members into slots, similar to the tape feeder. The coating check unit 50 includes a holding roller 52 that holds a sheet material 51 such as paper wound in a roll so that it can be fed out, a winding roller 53 that winds up the sheet material 51, and a support part that supports the lower surface of the sheet material 51 that has been fed into the test-pressing area A, as well as a plurality of guide rollers that guide the sheet material 51. The coating check unit 50 rotates the winding roller 53 by the drive of a drive motor (not shown), thereby feeding the sheet material 51 from the holding roller 52 to the test-pressing area A and winding it onto the winding roller 53. Furthermore, the coating check unit 50 performs a test spray by dispensing liquid material from the discharge nozzle 34 of the coating head 30 toward the sheet material 51 in the test spray area A, in order to check the discharge condition, such as whether the discharge nozzle 34 of the coating head 30 is clogged, and to check the liquid material (type) in the syringe 32.
[0018] As shown in Figure 2, the control device 60 is configured as a microprocessor centered around a CPU 61, and in addition to the CPU 61, it includes a ROM 62, an HDD 63, a RAM 64, and an input / output interface 65. These are electrically connected via a bus 66. The control device 60 outputs control signals to the component supply device 12, the substrate transport device 14, the moving device 20, the coating head 30, the mark camera 40, the parts camera 45, the coating check unit 50, and the display operation panel 55 via the input / output interface 65. The control device 60 also receives images captured from the mark camera 40 and the parts camera 45, and operation signals from the display operation panel 55. The HDD 63 stores production information for the substrate S and reference value information 63a for the liquid material. The production information for the substrate S includes information such as the type of components to be mounted, the mounting order, mounting position, and number of mounting points, as well as information such as whether or not liquid material is applied to the substrate S, and when applied, the type of liquid material, the application position, and the amount applied. Reference value information 63a is information that associates reference values indicating the color information of the liquid material in the image with the type of liquid material, and the details will be described later.
[0019] Next, we will explain the operation of the mounting device 10 configured in this way, specifically the process for confirming whether the syringe 32 attached to the coating head 30 is the syringe 32 containing the liquid material to be coated, that is, the suitability of the syringe 32. Here, liquid coating defects include cases where the amount of liquid material coated is reduced due to clogging of the discharge nozzle 34, and cases where a different type of liquid material is coated because a syringe 32 other than the one that should be used is attached to the coating head 30. In the latter case, it directly leads to product defects. In this embodiment, in order to prevent such product defects, a process is performed to confirm the suitability of the syringe 32.
[0020] First, we will explain the process of registering a reference value for brightness as color information to be used as a basis for verification. Figure 3 is a flowchart showing an example of the reference value registration process. Figure 4 is an explanatory diagram showing an example of the reference value registration process. The reference value registration process in Figure 3 is performed when the type of liquid material in the attached syringe 32 has already been identified. Note that when the reference value registration process is executed, it is sufficient if the type of liquid material is entered, for example, by the operator who attached the syringe.
[0021] In the reference value registration process shown in Figure 3, the CPU 61 of the control device 60 first causes the mark camera 40 to capture pre-coating images of the test area A for each light source color before dispensing the liquid material from the discharge nozzle 34 of the coating head 30 to the test area A of the coating check unit 50 (S100). In S100, the CPU 61 causes the mark camera 40 (camera body 44) to capture pre-coating images of the red light source with only the red LED 42a lit (Image (1) in Figure 4), pre-coating images of the blue light source with only the blue LED 42b lit (Image (2) in Figure 4), and pre-coating images of the green light source with only the green LED 42c lit (Image (3) in Figure 4). Each image is a grayscale image with, for example, 256 gradations of brightness values from 0 to 255.
[0022] Next, the CPU 61 dispenses liquid material from the discharge nozzle 34 of the coating head 30 to the test application area A (S110, circle in Figure 4), and has the mark camera 40 capture images of the test application area A after coating for each light source color (S120). In S120, the CPU 61 has the mark camera 40 (camera body 44) capture images of the post-coating area with a red light source when only the red LED 42a is lit (image (4) in Figure 4), the post-coating area with a blue light source when only the blue LED 42b is lit (image (5) in Figure 4), and the post-coating area with a green light source when only the green LED 42c is lit (image (6) in Figure 4).
[0023] Next, the CPU 61 generates difference images of the pre-coating image and the post-coating image for each light source color, and obtains the luminance value of these difference images as a reference value (S130). In S130, the CPU 61 generates difference images of the pre-coating and post-coating images for a red light source (Image (7) in Figure 4), difference images of the pre-coating and post-coating images for a blue light source (Image (8) in Figure 4), and difference images of the pre-coating and post-coating images for a green light source (Image (9) in Figure 4). Note that the reference values in Figures 4 (7) to (9) are just examples and are not limited to these reference values.
[0024] Furthermore, the CPU 61 can acquire the brightness value (brightness value equal to or greater than a predetermined value) of each pixel in the difference image, calculate its average value, and use the average value as the reference value. Note that the brightness value of the coated area where the liquid material is applied changes relatively large before and after application, so it will include pixels with brightness values equal to or greater than a predetermined value. In addition, the CPU 61 may have the mark camera 40 capture one or more pre-coating images and post-coating images for each light source color in S100 and S120. For example, if multiple pre-coating images are captured for each light source color in S100, the CPU 61 can acquire the brightness value of each pixel in the coated area of each pre-coating image for each light source color and use its average value as the brightness value of the pre-coating image. Similarly, if multiple post-coating images are captured for each light source color in S120, the CPU 61 can acquire the brightness value of each pixel in the coated area of each post-coating image for each light source color and use its average value as the brightness value of the post-coating image. By using multiple images (before and after application), the influence of noise within the images can be suppressed, allowing for more accurate acquisition of reference values.
[0025] The CPU 61 then registers the luminance values for each light source color in the reference value information 63a, corresponding to the type of liquid material in the syringe 32 (S140), and terminates the process. As shown in Figure 5, the reference value information 63a contains reference values for the red light source image, the blue light source image, and the green light source image for each type of liquid material. Therefore, the CPU 61 can obtain the reference value for each type of liquid material from the reference value information 63a.
[0026] Next, we will explain the process for checking the suitability of the syringe 32 attached to the coating head 30. Figure 6 is a flowchart showing an example of the liquid suitability determination process. Figure 7 is an explanatory diagram showing an example of the liquid suitability determination process. The liquid suitability determination process in Figure 6 is executed by the CPU 61 before the start of production (coating work) when, for example, a new syringe 32 is attached to the coating head 30 due to a replacement operation by the operator.
[0027] In the liquid material suitability determination process shown in Figure 6, the CPU 61 first causes the mark camera 40 to capture pre-coating images of the test area A for each light source color before dispensing and applying the liquid material from the discharge nozzle 34 of the coating head 30 (S200). In S200, the CPU 61 causes the mark camera 40 (camera body 44) to capture pre-coating images of the red light source with only the red LED 42a lit, the blue light source with only the blue LED 42b lit, and the green light source with only the green LED 42c lit. In other words, in S200, pre-coating images for each light source color are captured, similar to S100.
[0028] Next, the CPU 61 dispenses liquid material from the discharge nozzle 34 of the coating head 30 to the test application area A (S210), and causes the mark camera 40 to capture images of the test application area A after coating for each light source color (S220). In S220, the CPU 61 causes the mark camera 40 (camera body 44) to capture images of the post-coating area with a red light source when only the red LED 42a is lit, the post-coating area with a blue light source when only the blue LED 42b is lit, and the post-coating area with a green light source when only the green LED 42c is lit. In other words, in S220, post-coating images for each light source color are captured, similar to S120.
[0029] Next, the CPU 61 generates a difference image between the pre-coating image and the post-coating image for each light source color, and obtains the luminance value of the difference image as the determination value (S230). In S230, the CPU 61 generates a difference image between the pre-coating image and the post-coating image for a red light source, a difference image between the pre-coating image and the post-coating image for a blue light source, and a difference image between the pre-coating image and the post-coating image for a green light source. That is, in S230, a difference image for each light source color is generated, similar to S130. In addition, the luminance value (luminance value greater than or equal to a predetermined value) of each pixel in the difference image is obtained, the average value is calculated, and the average value is used as the determination value. Alternatively, in S200 and S220, the CPU 61 may have the mark camera 40 capture one or more pre-coating images and post-coating images for each light source color, similar to S100 and S120, obtain the luminance value of each pixel in the coated area of the image for each light source color, and use the average value as the luminance value of each image. By using multiple images (image before coating, image after coating), the influence of noise in the images can be suppressed, and the judgment value can be obtained more appropriately.
[0030] The CPU 61 then reads a reference value from the reference value information 63a that corresponds to the type of liquid material to be applied in the current coating operation (S240). Next, the CPU 61 compares the judgment value obtained in S230 with the reference value read in S240 for each light source color (S250) and determines for each light source color whether the judgment value and the reference value are approximately the same (S260). The CPU 61 can determine whether the judgment value and the reference value are approximately the same based, for example, on whether the judgment value falls within a predetermined brightness range centered on the reference value. The predetermined brightness range is not particularly limited, but it can be set to a range where the brightness value is approximately ±20 from the reference value.
[0031] If the CPU 61 determines in S260 that the judgment value and the reference value are approximately the same, it determines that the syringe 32 is correct, that is, that the syringe 32 has been properly replaced (S270), and terminates this process. The CPU 61 determines in S260 that the judgment value and the reference value are approximately the same if they are approximately the same for all three colors of light sources: red, blue, and green. For example, in Figure 7, each judgment value in the middle column matches each reference value in the left column for all three colors of light sources: red, blue, and green, so it is determined that the syringe 32 (liquid material) is correct.
[0032] On the other hand, if the CPU 61 determines in S260 that the judgment value and the reference value do not approximately match, it determines that the syringe 32 is incorrect and not the correct syringe 32, that is, that the syringe 32 was not properly replaced, and reports an error (S280), terminating this process. The CPU 61 determines in S260 that the judgment value and the reference value do not approximately match if any one of the three colors of the red, blue, and green light sources does not approximately match. For example, in Figure 7, although the judgment value of the blue light source in the right column matches the reference value of the blue light source in the left column, the judgment value of the red light source (judgment value 46 in image (13)) does not match the reference value (value 146 in image (7)), and the judgment value of the green light source (value 117 in image (15)) does not match the reference value (value 208 in image (9)), so it is determined that the syringe 32 (liquid material) is incorrect. Note that the combination of matching and non-matching light sources shown in Figure 7 is just one example, and there may be other combinations other than those shown in Figure 7 that are also determined to be non-matching.
[0033] Furthermore, the CPU 61 notifies the operator of the error by, for example, displaying an error message on the display operation panel 55 (display unit) indicating that a syringe 32 with a different type of liquid has been mistakenly installed. The operator who notices this notification can take action, such as replacing it with the correct syringe 32. After that, the CPU 61 can re-execute the liquid suitability determination process to reconfirm whether the syringe 32 (liquid) is correct or not.
[0034] Here, the correspondence between the components of this embodiment and the components of the present disclosure will be clarified. The coating head 30 of this embodiment corresponds to the coating unit of the present disclosure, the camera body 44 of the mark camera 40 corresponds to the imaging unit, the CPU 61 that executes S200 to S230 of the liquid material suitability determination process corresponds to the determination value acquisition unit, and the control device 60 that executes S240 to S280 (excluding error notification) of the same process corresponds to the determination unit. The CPU 61 (control device 60) that executes the reference value registration process corresponds to the reference value acquisition unit. The light source unit 42 of the mark camera 40 corresponds to the light source unit. The CPU 61 that executes error notification in S280 of the liquid material suitability determination process and the display operation panel 55 correspond to the notification unit. In this embodiment, an example of the liquid material determination method of the present disclosure is also clarified by explaining the operation of the mounting device 10.
[0035] In the mounting apparatus 10 of this embodiment described above, the liquid material is applied to the coating head 30, and the image of the liquid material captured by the mark camera 40 (camera body 44) is processed to obtain a judgment value. Then, the CPU 61 performs a judgment process to determine whether the liquid material contained in the syringe 32 (container) is suitable or not, based on the standard value of the liquid material and the judgment value. This prevents product defects caused by applying a liquid material of a different type than the one that should be used.
[0036] Furthermore, the CPU 61 reads a reference value associated with the liquid contained in the syringe 32 from the reference value information 63a stored in the HDD 63, and performs a determination process to determine whether the liquid is suitable or not based on that reference value and the judgment value, thus enabling the determination process to be performed quickly.
[0037] Furthermore, the mark camera 40 can capture a monochrome image for each light source color when each light source color is individually illuminated by the light source unit 42. The CPU 61 processes the monochrome images for each light source color and acquires a reference value for each light source color, corresponding to the type of liquid material. The CPU 61 also causes the mark camera 40 to capture a monochrome image for each light source color of the liquid material applied to the coating head 30, processes the captured monochrome images for each light source color, and acquires a judgment value for each light source color. Then, the CPU 61 determines whether the liquid material contained in the syringe 32 is suitable based on the reference value and judgment value for each light source color, thereby improving the accuracy of the judgment.
[0038] Furthermore, the CPU 61, having identified the type of liquid material contained in the syringe 32, has the mark camera 40 capture an image of the liquid material applied to the test application area A (a predetermined location) by the application head 30, and processes the image to obtain a reference value. As a result, since the reference value and judgment value are obtained from images captured by the same mark camera 40, the influence of differences in image color is suppressed, and the judgment accuracy can be further improved compared to obtaining the reference value and judgment value from images captured by different cameras.
[0039] Furthermore, the CPU 61 causes the mark camera 40 to capture an image of the liquid material applied to the test-running area A by the application head 30, and processes the image to obtain a judgment value. In this way, it is possible to obtain both a reference value and a judgment value by applying the liquid material to the same location. Consequently, the influence of the color and material of the area to be applied (test-running area A) can be eliminated, and the color information of the liquid material (reference value, judgment value) can be obtained more accurately, thereby improving the judgment accuracy.
[0040] Further, the CPU 61 obtains, as a reference value, the difference between the luminance value in the pre-application image captured by the mark camera 40 before applying the liquid material to the application head 30 and the luminance value in the post-application image captured by the mark camera 40 after applying the liquid material to the application head 30. Similarly, the CPU 61 obtains, as a determination value, the difference between the luminance value in the pre-application image captured by the mark camera 40 before applying the liquid material to the application head 30 and the luminance value in the post-application image captured by the mark camera 40 after applying the liquid material to the application head 30. Thereby, for example, even when the environment such as the brightness around the mounting device 10 is different between when obtaining the reference value and when obtaining the determination value, the determination process for the suitability of the liquid material can be appropriately performed.
[0041] Further, when a new syringe 32 is attached by replacement, the CPU 61 obtains a determination value from an image obtained by applying the liquid material stored in the syringe 32 to the application head 30 and causing the mark camera 40 to capture an image. Then, when the reference value associated with the type of liquid material to be applied and the determination value substantially match, the CPU 61 determines that the liquid material stored in the syringe 32 is correct, thereby preventing product defects due to the installer's attachment error.
[0042] Further, in the mounting device 10, when it is determined that the liquid material is incorrect, it notifies the operator by displaying on the display operation panel 55 that a syringe 32 containing a different type of liquid material is attached, so that the operator can appropriately respond.
[0043] Note that the present disclosure is not limited to the above-described embodiments, and it is needless to say that the present disclosure can be implemented in various modes as long as it belongs to the technical scope of the present disclosure.
[0044] In the embodiment, the CPU 61 notifies the operator by displaying on the display operation panel 55 that a syringe 32 containing a different type of liquid material is attached (that is, the correct syringe 32 is not set), but the present disclosure is not limited to this. For example, the CPU 61 may notify the operator by transmitting the fact to the operator's mobile terminal or the like.
[0045] In this embodiment, the CPU 61 performs the liquid suitability determination process when a new syringe 32 is attached, but it is not limited to this. The CPU 61 may, for example, perform the liquid suitability determination process when the mounting device 10 is powered on. Alternatively, the CPU 61 may perform the liquid suitability determination process when instructed by an operator or the like.
[0046] In this embodiment, the CPU 61 caused the mark camera 40 to capture both a pre-coating image and a post-coating image when acquiring the judgment value, but it is not limited to this. In this embodiment, when acquiring the reference value and the judgment value, the liquid material is applied to the same location (test-running area A) and images are captured with the same mark camera 40, so the difference in color tone of the images is relatively small. In this way, when acquiring the judgment value by capturing the same location as when acquiring the reference value, the pre-coating image used when acquiring the reference value may be used as the pre-coating image when acquiring the judgment value, and the capture of the pre-coating image when acquiring the judgment value may be omitted. Also, the CPU 61 used the difference between the brightness value in the pre-coating image and the brightness value in the post-coating image as the reference value and judgment value, respectively, but it is not limited to this. If the difference in color tone of the images is relatively small, the CPU 61 may use the brightness value in the post-coating image as the reference value and judgment value, respectively. That is, the reference value and judgment value are not limited to the difference in brightness values before and after coating, but may also be the brightness value of the post-coating image.
[0047] In this embodiment, the liquid material was applied to the same location (test-shot area A) when obtaining the reference value and when obtaining the judgment value, but the invention is not limited to this, and the liquid material may be applied to different locations.
[0048] In the embodiment, in the mounting device 10, the control device 60 executes the reference value registration process to register the reference value in the HDD 63, but it is not limited thereto. For example, in a device other than the mounting device 10, the reference value may be registered by processing an image captured by the mark camera 40 or another camera. Alternatively, the reference value obtained from the image captured by the mark camera 40 of one mounting device 10 may be shared by a plurality of mounting devices 10. Further, the reference value is not limited to being stored in the storage unit (such as the HDD 63) of the mounting device 10, and may be stored in an external storage device such as a management device or a server. In such a case, instead of using the reference value read from the HDD 63, the control device 60 may use the reference value obtained by communicating with the external storage device. When the reference value is obtained by communicating with the external in this way, the control device 60 shall store the reference value in a non-volatile memory that retains data even when the power is turned off, and it is not necessary to obtain the reference value by communication every time in the liquid material suitability determination process. For example, when the mounting device 10 is started and the liquid material suitability determination process is executed when continuing production before the power is cut off, the reference value stored in the non-volatile memory before the power is cut off may be used.
[0049] In the embodiment, the mark camera 40 includes the light source unit 42 having three-color light sources of the red LED 42a, the blue LED 42b, and the green LED 42c, and the camera body 44 including the monochrome CCD, but it is not limited thereto. For example, the mark camera 40 may include a light source unit having a white light source and a camera including a color CCD. In such a case, the CPU 61 may process the color image to obtain the RGB values of the liquid material as the reference value and the determination value.
[0050] In this embodiment, the CPU 61 determined that the liquid material was of the correct type when the reference values and judgment values for the red, blue, and green light sources all substantially matched, but it is not limited to this. Light sources with small differences in luminance values (reference values and judgment values) even if the liquid material types are different may not be used for determination. For example, determination may be made using the reference values and judgment values for the red and blue light sources, but the green light source may not be used, or two of the three light sources may be used for determination and one may not be used. In such cases, the reference values for the light sources not used for determination may not be registered in the reference value information 63a, and the acquisition of judgment values may be omitted. By reducing the number (types) of light sources to be processed, the time required for image acquisition and image processing can be shortened, and determination can be made quickly.
[0051] In this embodiment, the suitability of a liquid material is determined in the liquid material suitability determination process by checking whether the determination value of the liquid material contained in the syringe 32 matches the reference value of the liquid material to be applied, but the invention is not limited to this. For example, the suitability of the liquid material may be determined after determining the type of liquid material contained in the syringe 32. For example, the CPU 61 may search for a reference value that matches the determination value based on the reference value for each type of liquid material registered in the reference value information 63a and the determination value, determine the type of liquid material contained in the syringe 32, and then determine the suitability of the liquid material by checking whether the determined type of liquid material matches the type of liquid material to be applied.
[0052] In this embodiment, the present disclosure has been described as a form of a mounting device 10, but it may also be in the form of a coating device or a liquid material determination method.
[0053] The liquid material determination method of the present disclosure is a liquid material determination method in a coating apparatus comprising a coating unit that dispenses a liquid material contained in a storage member and applies it to an object, and an imaging unit that captures an image, wherein the storage member is replaceably attached, and the method comprises: (a) having the imaging unit capture an image of the liquid material applied by the coating unit, and processing the captured image to obtain a determination value for the color information of the liquid material; and (b) performing a determination process to determine whether the liquid material contained in the storage member is suitable or unsuitable based on a reference value for the color information of the liquid material in the image and the determination value obtained in step (a).
[0054] The liquid material determination method of this disclosure, similar to the coating apparatus of this disclosure described above, can prevent product defects caused by applying different types of liquid materials. In this liquid material determination method, various embodiments of the coating apparatus of this disclosure may be adopted, or steps that realize the functions of the coating apparatus of this disclosure may be added.
[0055] This specification also discloses technical concepts in which the coating apparatus described in claim 6 of the original application was changed from "the coating apparatus described in claim 2 or 3" to "the coating apparatus described in any one of claims 2 to 5", as well as technical concepts in which the coating apparatus described in claim 7 of the original application was changed from "the coating apparatus described in claim 1 or 2" to "the coating apparatus described in any one of claims 1 to 6", and technical concepts in which the coating apparatus described in claim 9 of the original application was changed from "the coating apparatus described in claim 2 or 3" to "the coating apparatus described in any one of claims 2 to 8".
[0056] This disclosure is applicable to the technical field of applying liquid materials to replaceable housing members.
[0057] 10 Mounting device, 12 Parts supply device, 14 Board transport device, 20 Moving device, 21, 23 Guide rails, 22 X-axis slider, 24 Y-axis slider, 30 Head (coating head), 32 Syringe, 34 Discharge nozzle, 36 Detachable member, 38 Slider, 40 Mark camera, 42 Light source unit, 42a Red LED, 42b Blue LED, 42c Green LED, 44 Camera body, 45 Parts camera, 50 Coating check unit, 51 Sheet material, 52 Holding roller, 53 Winding roller, 55 Display operation panel, 60 Control device, 61 CPU, 62 ROM, 63 HDD, 63a Reference value information, 64 RAM, 65 Input / output interface, 66 Bus, A Test area, S Board.
Claims
1. A coating apparatus in which a storage member for containing a liquid material is interchangeably attached, comprising: a coating unit for dispensing the liquid material contained in the storage member and applying it to an object; an imaging unit for capturing an image; a determination value acquisition unit for causing the imaging unit to capture an image of the liquid material applied by the coating unit, and for processing the captured image to obtain a determination value for the color information of the liquid material; and a determination unit for performing a determination process to determine whether the liquid material contained in the storage member is suitable or unsuitable based on a reference value for the color information of the liquid material in the image and the determination value obtained by the determination value acquisition unit.
2. The coating apparatus according to claim 1, further comprising a reference value acquisition unit that acquires the reference value associated with the liquid material contained in the containment member, wherein the determination unit performs the determination process using the reference value acquired by the reference value acquisition unit.
3. The imaging unit is capable of capturing a monochrome image for each light source color when each light source color is individually irradiated by a light source unit capable of individually irradiating with a plurality of light source colors; the reference value acquisition unit processes the monochrome image for each light source color to acquire the reference value for each light source color; the determination value acquisition unit causes the imaging unit to capture a monochrome image for each light source color of the liquid material applied to the coating unit, processes the captured monochrome image for each light source color to acquire the determination value for each light source color; and the determination unit performs the determination process based on the reference value and the determination value for each light source color in the determination process. The coating apparatus according to claim 2.
4. The coating apparatus according to claim 2 or 3, wherein the reference value acquisition unit determines the type of liquid material contained in the storage member, causes the imaging unit to capture an image of the liquid material applied to a predetermined location in the coating unit, and processes the captured image to acquire the reference value.
5. The coating apparatus according to claim 4, wherein the determination value acquisition unit causes the coating unit to capture an image of the liquid material applied to the predetermined location, and processes the captured image to acquire the determination value.
6. The coating apparatus according to claim 2 or 3, wherein the reference value acquisition unit acquires the difference between the color information in a pre-coating image captured by the imaging unit before the liquid material is applied to the coating unit and the color information in a post-coating image captured by the imaging unit after the liquid material is applied to the coating unit as the reference value, and the determination value acquisition unit acquires the difference between the color information in a pre-coating image captured by the imaging unit before the liquid material is applied to the coating unit and the color information in a post-coating image captured by the imaging unit after the liquid material is applied to the coating unit as the determination value.
7. The coating apparatus according to claim 1 or 2, wherein when a new storage member is installed by replacement, the determination value acquisition unit obtains the determination value from an image captured by the imaging unit after the liquid material stored in the storage member is applied to the coating unit, and the determination unit performs the determination process based on the reference value of the liquid material to be applied and the determination value when a new storage member is installed by replacement.
8. The coating apparatus according to claim 7, further comprising a notification unit that, when the liquid material is determined to be unsuitable in the determination process, a storage member containing a different type of liquid material has been installed.
9. The coating apparatus according to claim 2 or 3, wherein the reference value acquisition unit is capable of acquiring the reference value for each type of liquid material, and the determination unit, in the determination process, determines the type of liquid material contained in the containment member based on the reference value for each type of liquid material and the determination value, and then determines whether the liquid material is suitable.
10. A method for determining a liquid material in a coating apparatus comprising a coating unit for dispensing a liquid material contained in a storage member and applying it to an object, and an imaging unit for capturing an image, wherein the storage member is replaceable, the method comprising: (a) having the imaging unit capture an image of the liquid material applied to the coating unit, and processing the captured image to obtain a determination value for the color information of the liquid material; and (b) performing a determination process to determine whether the liquid material contained in the storage member is suitable or unsuitable based on a reference value for the color information of the liquid material in the image and the determination value obtained in step (a).