JPH0362597A - Viscous fluid application method and viscous fluid application device - Google Patents

Abstract

PURPOSE:To always obtain accurate amount of spreading, by measuring the area of spread viscous fluid, accurately measuring the spread shape at the same time, accurately calculating the amount of discharge by using the above results, and feeding-back it to a controlling part. CONSTITUTION:Viscous fluid 10 spread on a plate material 5 is irradiated with slit light 11 having a constant inclination angle, by an illuminating apparatus 9, and at the same time, the slit images 12a, 12b are recognized from above by a camera 6. Points of inflection 12c are recognized on both end-portions of the slit image 12a of the viscous fluid 10. Further the height dimension of the viscous fluid 10 is obtained from the position deviation between the slit image 12a obtained by scanning and the slit image 12b on the plate material 12b. In this manner, the area of the viscous fluid spread on the plate material 5 and the height dimension at each position are detected, thereby calculating the amount of discharge of the viscous fluid 10. By feeding-back the obtained amount of discharge to a controlling part, the accurate amount of spreading can be obtained.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a viscous fluid application method for applying a fixed amount of viscous fluid to a plate material used in the manufacturing process of electronic circuit device parts, etc. .

2. Description of the Related Art An example of a conventional viscous fluid application method will be explained with reference to FIGS. 3 to 5.

FIG. 3 is a perspective view of a conventional viscous fluid application device. Third
In the figure, reference numeral 1 denotes a base, and two coating heads 3 are placed on an X-table 2 placed behind the base 1. Reference numeral 4 denotes a Y table, which is arranged at the center of the base 1 and has a plate material 5 on which a viscous fluid is applied. A fixed amount of viscous fluid is discharged from the coating head 3 and applied onto the plate material 5.

An example for keeping the discharge amount of viscous fluid constant is shown in FIGS. 4 and 5. In FIG. 4, the X table 2, coating head 3, Y table 4, and plate material 5 are the same as in FIG. 3. Reference numeral 6 denotes a recognition unit, which comprises a recognition camera and a lens for measuring the volume S of the viscous fluid applied in parallel with the application head 3. A sensor 7 measures the height of the applied viscous fluid. Further, a discarding station 8 is provided for continuously applying coating until the discharge amount becomes stable. Furthermore, a control section (not shown) is provided that calculates the discharge amount from the obtained area S and height.

As shown in the flowchart of FIG. 5, even when applying after a certain period of time, the viscous fluid is applied at the discard station 8, and after the Nth discard, the recognition unit 6 is used to calculate the coating area in step 21. After measuring and calculating the center position, move the sensor 7 there, use this to measure the coating height in step 22, calculate the discharge amount VN in the control section in step 23, and calculate the discharge amount ff1VN. After confirming that a certain amount of coating has been applied in step 24 or step 25 by comparing it with a preset discharge amount ff1Vt or calculating the difference V between the discharge amounts of consecutive coatings, coating starts, and the plate material 5 is ll1lI to do the application to? a, so a constant amount is always applied. In this way, coating is repeatedly performed at n stations until the discharge amount becomes stable.

Problems to be Solved by the Invention However, in the conventional example as described above, the area is first calculated, and the height of the viscous fluid discharged at the center position is detected. At this time, the shape of the viscous fluid applied to the plate material is, for example, a conical shape, and the discharge amount is calculated, but in reality, the shape of the application varies as shown in Figures 6 (a) to (d). It has a shape. In the example shown in FIG. 6, the coating area 63 and the coating height are all the same, but the discharge amounts are different, so it is impossible to calculate the exact discharge amount. Naturally, even if feedback is given to the above-mentioned 1lIIJt [1 part], it is impossible to accurately discharge an appropriate amount onto the plate material.

The present invention solves the above problems and aims to provide a viscous fluid application method that can accurately apply a certain amount of viscous fluid.

Means for Solving the Problems In order to solve the above problems, the viscous fluid application method of the present invention is realized by accurately calculating the discharge amount of the viscous fluid applied onto the plate material and feeding it back to the control unit. There is a first step of applying a viscous fluid onto the plate material, a second step of irradiating the applied viscous fluid with a slit light having a constant inclination angle from diagonally above, and a step of applying the applied viscous fluid and the slit. A third step of scanning the slit image on the viscous fluid from above by moving the light relative to it, a fourth step of recognizing the inflection point of the slit image, and a step of scanning the slit image on the applied viscous fluid and a reference. A fifth step of detecting the amount of positional displacement with respect to the slit image on the surface, a sixth step of calculating the height dimension of the viscous fluid based on this amount of displacement, and a step of calculating the height of the viscous fluid obtained in the fourth step and the sixth step, respectively. The method includes a seventh step of calculating the discharge amount of the applied viscous fluid from the surface W1 and height of the surface W1, and an eighth step of providing feedback to the control unit in order to keep the discharge amount constant.

Function: With the above configuration, the area of the applied viscous fluid is measured, and at the same time, the applied shape is also accurately measured, and the discharge amount is accurately calculated based on these and fed back to the control unit, so that an accurate meter can be maintained at all times. is obtained.

Example An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a configuration for explaining a viscous fluid application method according to an embodiment of the present invention, and the basic configuration is the same as that of the conventional example shown in FIG. In FIG. 1, a lighting device 9 is installed in place of the conventional sensor. That is, as shown in FIG.
The slit images 12a and 12b are recognized by the camera 6 from above. At this time, the camera 6 recognizes the slit Igz12a on the top surface of the viscous fluid 10 and the slit image 12b on the top surface of the plate material 5, as shown in FIG. Then, inflection points 12G are recognized at both ends of the slit image 12a in the viscous fluid 10.

In this state, the illumination device 9 is moved in six directions via a screw shaft 14 rotated by a motor 13 to sequentially irradiate the entire upper surface of the viscous fluid 10 with slit light 11, and the camera 6 scans the slit image 12a. The contour line of the viscous fluid 10 can be recognized from the inflection point 12G obtained by this scan.

In addition, in FIG. 1, 15 is a ray of light, 16 is a lens,
The slit light 11 is a slit hole 18 provided in the bottom part 17.
It is formed by the light that passes through the

Further, the height dimension of the viscous fluid 10 is determined by the following equation based on the positional displacement amount ΔR between the slit image 12a of the viscous fluid 10 obtained by this scan and the slit image 12b on the plate material 5.

Day=ΔIxcotα By detecting the application area of the viscous fluid 10 applied on the plate material 5 and the height dimension at each position in this way, the viscous fluid with various cross-sectional shapes as shown in FIG. Also, it becomes possible to accurately calculate the discharge amount. By feeding back the determined discharge amount to a control unit (not shown), a constant amount is always applied.

In the above embodiment, scanning is performed by moving the slit light relative to the viscous fluid, but it is also possible to fix the slit light and perform scanning by using the movement of the X table 2 or the Y table 4. .

Effects of the Invention As described above, according to the present invention, it is possible to accurately calculate the discharge amount of the applied viscous fluid from the viscous fluid and the respective height dimensions at each position, and the calculated discharge amount Feedback is sent to the control unit according to the amount of paint, so it is now possible to always apply a constant amount.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a coating device 15 for explaining a viscous fluid coating method according to an embodiment of the present invention, and FIG. 2 is a top view and a side view for explaining a slit image in a viscous fluid.
Fig. 3 is a perspective view of a conventional viscous fluid coating device, Fig. 4 is a perspective view of the head, Fig. 5 is a flowchart showing a conventional coating method, and Fig. 6 is a representative example of a viscous fluid applied onto a plate. FIG. 5... Board material, 6... Camera, 9... Lighting device, 1
0... Viscous fluid, 11... Slit light, 12a,
12b...Slit image, 12c...Inflection point.

Claims (1)

[Claims] 1. A first step of applying a viscous fluid onto a plate material, a second step of irradiating the applied viscous fluid with slit light having a constant inclination angle from diagonally above, and a step of applying the applied viscous fluid and the slit light. A third step of relatively moving the slit image on the viscous fluid to scan it from above, a fourth step of recognizing the inflection point of the slit image, and comparing the slit image on the applied viscous fluid with the reference plane. A fifth step of detecting the amount of positional displacement with respect to the slit image, a sixth step of calculating the height dimension of the viscous fluid from this amount of displacement, and the area and area of the viscous fluid determined in the fourth and sixth steps, respectively. A viscous fluid application method comprising: a seventh step of calculating the discharge amount of the applied viscous fluid from the height; and an eighth step of providing feedback to a control unit to keep the discharge amount constant.