JPH04338257A - Method and device for applying viscous liquid agent - Google Patents

Abstract

PURPOSE:To suppress a small deviation of coating amount and to apply an optional amount when a fine part is coated with a small amount of a high viscosity viscous liquid agent such as an adhesive and a lubricant. CONSTITUTION:In the applying method of the viscous liquid agent by which a coating pin 7 is dipped in the viscous liquid agent 4 supplied to a viscous liquid agent supplying part 2 and is lifted up and the viscous liquid agent 4 is stuck to the coating pin 7 and is brought into contact with a work 8, a coating amount to the object work is found by using image measuring instruments 9, 9' and based on it the supplying method of the viscous liquid agent 4 and the operation method of the coating pin 7 are varied and the coating amount of the next coating is controlled.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a method and apparatus for applying a viscous liquid, and is particularly applicable to the technical field of applying a trace amount of a highly viscous liquid such as an adhesive or lubricant to a minute part. The present invention relates to a suitable viscous liquid coating method and apparatus.

0002

2. Description of the Related Art As electronic components become smaller and more precise, each component becomes smaller. Adhesives are widely used to fasten these components. Furthermore, when these component parts move together, a lubricant is often applied. For example, in precision equipment products such as magnetic heads, the amount of high viscosity liquid such as adhesive applied is very small.

For example, in the case of adhesive, a method for applying a small amount of viscous liquid of this type is to apply the adhesive to a thin needle tip, check the adhesion of the adhesive to the needle tip under a microscope, and then apply the adhesive onto the workpiece. Also, as shown in FIG. 18, the applicator pin 7 is immersed in the adhesive 54 filled in the adhesive reservoir 53, the adhesive is applied to the tip of the pin, and the adhesive is transferred onto the workpiece 8. Furthermore, after filling the adhesive reservoir 53 with adhesive, excess adhesive 54 protruding from the adhesive reservoir 53 is scraped off with a scraping board (not shown), and the adhesive is removed. There is also a method of keeping the amount of adhesive filled in the reservoir 53 constant.

[0004] An example of a coating method using this type of adhesive reservoir 53 and coating pin 7 is disclosed in Japanese Patent Laid-Open No. 61-268375. Further, other mechanical discharge coating methods include a tubing pressure feeding method, an air pressure feeding method, a rotary pump method, and the like.

[0005]

Among the above-mentioned conventional techniques, the applicator pin method has been devised in terms of applying a high viscosity liquid such as an adhesive in a fixed amount, but it has the following problems.

In other words, in the case of the applicator pin as shown in FIG. 18, the applicator pin 7 is dipped into the adhesive 4' filled in the adhesive reservoir 3', and the adhesive 4' is applied to the tip of the applicator pin 7. When applying the adhesive, if the depth of the adhesive 4' filled in the adhesive reservoir 3' changes, the depth into which the applicator pin 7 is immersed changes, resulting in a change in the amount of adhesion, resulting in variations in the amount of application.

[0007] This variation becomes a non-negligible amount as the components to be coated become smaller.

Another problem is that when the type of component to be coated changes, it is not possible to easily change the coating amount to a desired amount, which increases setup time.

On the other hand, with mechanical discharge coating methods such as tubing pressure feeding method, pneumatic feeding method, rotary pump method, etc., it is easy to change the coating amount beyond a certain level, but when the coating amount is small, the discharge amount for each shot may be changed. There is a problem in that the variations become very large and stable coating cannot be achieved.

[0010] Furthermore, when applied in a small amount, it is susceptible to changes in the viscosity of the viscous liquid and the wettability of the viscous liquid, which is affected by the state of cleaning of the surface of the workpiece. Therefore, when applying small amounts continuously to the same type of workpiece using an automatic machine, the viscosity and wettability of the above-mentioned viscous liquid will change depending on the usage time of the viscous liquid, the lot of the workpiece, etc., and the amount of application will gradually decrease. Or, there is a problem of sudden changes.

[0011] The first object of the present invention is to provide a method for stably applying a high viscosity liquid agent in a small but arbitrary amount, and the second object is to provide a coating apparatus suitable for carrying out this coating method. of,
Each has something to offer.

0012

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method and device for supplying a viscous liquid agent, a method and device for measuring a coating amount, in addition to a conventional coating method and device using a coating pin. , a coating amount control method and an apparatus therefor.

That is, as a method and apparatus for supplying a viscous liquid agent, firstly, the viscous liquid agent is made to protrude into the recessed portion of a member having uneven portions, and the viscous liquid agent supplied to the recessed portion is scraped away by a scraping plate. It was designed to be supplied by

[0014] Secondly, the viscous liquid agent is made to protrude from the flat part of the member, and the scraped part is controlled so that the tip of the scraped part is at a predetermined distance from the flat part,
The viscous liquid agent is scraped off and then supplied.

Thirdly, the viscous liquid agent is supplied after measuring the surface position of the viscous liquid extruded from the discharge port of the viscous liquid container or the viscous liquid agent supplied so as to protrude onto the member. .

That is, in the first and second supply methods, the amount of the viscous liquid that adheres to the applicator pin is reduced by pushing the applicator pin into the viscous liquid supplied to a predetermined thickness to the bottom of the member. , which is determined mechanically by the thickness of the viscous liquid. In the third supply method, by inserting a predetermined amount of the applicator pin based on the measured surface of the viscous liquid, the amount of the viscous liquid that adheres to the applicator pin is set to a predetermined amount, and then the first and second supply methods are performed. It aims at the same effect as.

[0017] Furthermore, as a method and apparatus for measuring the coating amount, firstly, the amount of the viscous liquid adhered to the coating pin is detected and measured by an imaging measuring device such as a television camera before and after applying the viscous liquid to the workpiece. Based on the difference in the amount of adhesion before and after application,
It is designed to measure the amount of coating applied to the workpiece.

Secondly, the amount and position of the viscous liquid applied to the workpiece is detected and measured by an imaging measuring device such as a television camera placed in front of the coating surface of the workpiece.

[0019] Also, as a method and device for controlling the amount of application, firstly, the thickness of the viscous liquid is changed to a constant thickness, and the applicator pin is immersed in the viscous liquid, or the surface position of the viscous liquid is adjusted. By changing the stopping position of the immersed applicator pin, the depth at which the applicator pin is immersed in the viscous liquid can be changed to control the amount of viscous liquid that adheres to the applicator pin, thereby controlling the amount applied to the workpiece. It is something to do.

[0020] Secondly, the time during which the applicator pin is immersed in the viscous liquid is varied.

Thirdly, the stopping position or stopping time of the application pin relative to the workpiece is changed.

Fourthly, the applicator pin is replaced with one having a different cross-sectional area or circumferential length.

[0023]

[Operation] First, in supplying the viscous liquid, first, the viscous liquid is taken out from the container containing the viscous liquid into the concave part of the member having uneven parts, and the supplied viscous liquid is removed by pressing a scraping plate larger than the concave part against the convex part. By scraping away the excess, the viscous liquid is made to have a constant thickness equal to the depth of the recess. Second, by scraping off the viscous liquid taken out from the container containing the viscous liquid on the flat part of the member so that the tip of the scraping plate is at a predetermined distance from the flat part, the viscous liquid is removed. The thickness is made constant to be the same as the distance between the flat part and the tip of the scraped part. Third, the surface position of the viscous liquid extruded from the outlet of the viscous liquid container or the viscous liquid supplied so as to protrude onto the member is measured by an imaging measuring device such as a television camera placed on the side. . In the first configuration, by abutting the applicator pin against the bottom of the recess, in the second configuration, by abutting the applicator pin against the flat surface, and in the third configuration, the measured surface position of the viscous liquid agent is determined. By making the amount of insertion of the applicator pin into the viscous liquid constant, the amount that the tip of the applicator pin is immersed in the viscous liquid is constant, and the amount of viscous liquid that sticks to the tip of the applicator pin after being pulled out from the viscous liquid can be reduced. It can be made uniform. In addition, by changing the depth of the recess, the distance between the flat part and the tip of the scraped part, the amount of insertion of the applicator pin into the viscous liquid from the measured surface position of the viscous liquid, etc.
The amount of viscous liquid that adheres to the tip of the applicator pin can be changed as desired. By contacting the applicator pin with a fixed amount or arbitrary amount of this viscous liquid attached to the workpiece,
Depending on the amount of viscous liquid agent attached to the application pin, it is possible to apply a fixed amount or an arbitrary amount.

Next, in measuring the coating amount, first, the amount of the viscous liquid agent adhering to the coating pin is detected and measured from the side of the coating pin using an imaging device such as a television camera. The image capturing and measuring device captures an image of the viscous liquid that has adhered to the tip of the applicator pin in the form of a droplet using, for example, a television camera. In the image capturing and measuring device, the volume of the tip of the applicator pin is estimated by assuming that the captured image of the tip of the applicator pin to which the viscous liquid has adhered is rotationally symmetrical about the center of the applicator pin. The volume of only the applicator pin is removed from this volume to determine the volume of only the viscous liquid agent, and the amount of adhesion to the applicator pin is determined. The amount of viscous liquid applied to the workpiece is measured before and after applying the viscous liquid to the application pin, and the amount applied to the workpiece is determined from the difference in the amount of viscous liquid applied to the application pin before and after application.

Second, the amount and position of the viscous liquid applied to the workpiece is detected and measured by an imaging and measuring device such as a television camera placed in front of the coating surface of the workpiece. The photographing and measuring device photographs an image of the coated surface of the workpiece using, for example, a television camera. In the imaging measurement device, the image of the viscous liquid is extracted from the captured images, and the area, center of gravity, shape, etc. of the viscous liquid on the application surface of the workpiece are calculated.
Determine the amount and position of the viscous liquid applied.

Furthermore, in controlling the application amount, first, as described above, the inside of the viscous liquid is determined based on the depth of the recess, the distance between the flat part and the tip of the scraped part, and the measured surface position of the viscous liquid. The depth at which the applicator pin is immersed in the viscous liquid can be changed by changing the insertion amount of the applicator pin. As a result, the viscous liquid adheres to the application pin depending on the depth of immersion. The amount of coating can be controlled by bringing this coating pin into contact with the workpiece. Second, in the first step, the insertion time of the applicator pin into the viscous liquid agent is changed. Due to the viscosity of the viscous liquid applied to the portion into which the applicator pin is inserted, the state of contact with the applicator pin is not constant at an instant. Therefore, by changing the time for which the applicator pin is inserted into the viscous liquid, the amount of viscous liquid that adheres to the applicator pin after being pulled out of the viscous liquid can be changed, and the amount applied to the workpiece can be controlled. Third, the viscous liquid adhering to the tip of the applicator pin becomes a droplet in a state where the weight of the viscous liquid and the surface tension of the viscous liquid are balanced at the tip of the pin and hangs down from the tip of the applicator pin. Therefore, when applying a viscous liquid by bringing it into contact with a workpiece, the viscous liquid adhered to the applicator pin comes into contact with the workpiece before the tip of the applicator pin contacts the workpiece, and depending on the degree of contact, The viscous liquid is applied to the workpiece. Since the degree of contact can be controlled by the distance between the workpiece and the tip of the application pin, the amount of application can be controlled by the stopping position of the application pin with respect to the workpiece. In addition, if the viscous liquid attached to the applicator pin comes into contact with the workpiece, the viscous liquid will
It adheres to both the applicator pin and the workpiece, and flows from the applicator pin to the workpiece depending on the elapsed time after contact. Therefore, the amount of application can be controlled by the time during which the viscous liquid agent attached to the application pin is in contact with the workpiece, that is, the time during which the application pin is stopped with respect to the workpiece. Fourth,
When the immersion depth of the applicator pin is the same, the amount of viscous liquid that adheres to the applicator pin is estimated to vary depending on the surface tension of the viscous liquid. In addition, surface tension varies depending on the circumference of the applicator pin, so if the cross-sectional shape of the applicator pin is the same, the cross-sectional area depends on the circumference, and the amount of viscous liquid that adheres to the applicator pin can be controlled by the cross-sectional area. become.

[0027]

[Embodiment] An embodiment of the present invention will be described below.

In FIG. 2, a viscous liquid 4 is filled into a syringe 6 by a pneumatic viscous liquid supply device 5.
is supplied to the concave-shaped viscous liquid reservoir 3 of the viscous liquid supply section 2. The amount of the viscous liquid agent 4 to be supplied is set to be larger than the capacity of the viscous liquid agent reservoir 3. After the viscous liquid agent 4 is supplied to the viscous liquid agent reservoir part 3, the excess viscous liquid agent 4 protruding from the viscous liquid agent reservoir part 3 is scraped off and removed using a scraping plate 1 having an edge part. As a result, the thickness of the viscous liquid 4 filled in the viscous liquid retainer 3 becomes constant. Next, as shown in FIG. 1, the tip of the applicator pin 7 is immersed in the viscous liquid reservoir 3. At this time, the tip of the applicator pin 7 is either brought into contact with the bottom of the viscous liquid reservoir 3 and stopped, or the lowered position of the applicator pin 7 is controlled so that the tip position is always constant. The amount of immersion of the tip of the application pin 7 into the liquid reservoir 3 is kept constant. Next, when the application pin 7 is raised, the viscous liquid 4 having a certain spherical shape adheres to the tip of the application pin 7 due to the action of the surface tension of the viscous liquid 4. Next, the amount of the viscous liquid agent 4 adhering to the application pin 7 is measured by an imaging measuring device 9 such as a television camera placed on the side of the raised position of the application pin 7 . FIG. 3 shows a TV monitor screen 10 captured by, for example, a TV camera, and the viscous liquid agent 4 adhering to the tip of the applicator pin 7 is measured. Since the adhesion shape is almost rotationally symmetrical with respect to the central imaginary line 11, the radius R from the central imaginary line 11 to the surface position of the adhered viscous liquid agent 4 is measured, and this is integrated in the longitudinal direction of the applicator pin. By subtracting the volume of the application pin from this, the amount of adhered viscous liquid agent 4 can be easily measured. This viscous liquid agent 4
The applicator pin 7 to which it has adhered is moved onto the workpiece 8, and the applicator pin 7 is vertically lowered onto the workpiece 8 to apply the viscous liquid agent 4. After this, the viscous liquid agent adhering to the applicator pin is removed as necessary. Here, depending on the measured amount of the viscous liquid agent 4 adhering to the application pin 7, the amount of application onto the workpiece 8 can be controlled by changing the stopping position or stopping time of the application pin 7 relative to the workpiece 8. can. After the viscous liquid 4 is applied to the work 8, the amount and position of the viscous liquid applied to the work 8 are measured by an imaging measuring device 9' such as a television camera placed above the work 8. FIG. 4 shows, for example, a TV monitor screen 10' captured by a TV camera, and viscous liquid agents 4, 4' are measured on the upper surface of the workpiece 8. The area, center of gravity, shape, presence or absence of the viscous liquid applied in isolation, etc. of the viscous liquid 4, 4' can be measured by image processing. For example, in FIG. 4, by extracting the protruding portion 18 of the applied viscous liquid agent 4, it is possible to check whether the applied liquid is protruding into places where it should not be attached, or whether it is scattering like the viscous liquid agent 4'. It is possible to inspect the coating condition, such as whether or not it is damaged. At the same time, by detecting changes in the coating amount and position on the workpiece 8, when an automatic machine repeatedly coats the same workpiece, the coating amount and position of the next workpiece can be controlled. This makes it possible to stabilize the amount, position, etc. of application.

In this embodiment, the shape of the viscous liquid retaining part 3 of the viscous liquid supply part 2 can be made as shown in FIG. As shown in FIG. 5, by sloping the bottom surface of the viscous liquid retainer 3, the thickness of the viscous liquid 4 can be changed. Thereby, by abutting the applicator pin 7 against the bottom of the viscous liquid reservoir 3 at a desired thickness position, the immersion depth of the applicator pin 7 can be easily changed to d1 or d2.

Another example of changing the immersion depth of the coating pin 7 in this embodiment will be shown with reference to FIGS. 6 and 7. In FIG. 6, the horizontal movement section 13 is placed on a horizontal rail so that it can move in the horizontal direction. On the horizontal movement section 13,
There is a vertical movement section 14 that is movable in the vertical direction, and the vertical movement section 14 includes a scraping plate 1 and a laser displacement meter 1.
It has a 5 on it. While measuring with a laser displacement meter 15 such as a triangulation type, the vertical moving unit 14 is controlled to set the distance g between the flat plate-shaped viscous liquid supply unit 2 and the tip of the scraping plate 1 to a desired interval, and the horizontal moving unit 13 is moved. Move to the right on the drawing,
The viscous liquid agent 4 is rubbed off with a scraping plate 1. When the distance g between the viscous liquid supply unit 2 and the tip of the scraping plate 1 is kept constant, a viscous liquid with a constant thickness is created as shown by the broken line, and when the distance g is changed and the distance g is changed, the viscous liquid is scraped at a certain location as shown by the dashed-dotted line. This creates viscous liquids with different thicknesses. Therefore, as shown in FIG. 7, by using this method to abut the applicator pin 7 on different locations of the viscous liquid that have different thicknesses depending on the location, the immersion depth of the applicator pin 7 can be easily adjusted to d3 and d4. It can be changed.

By the way, the relationship between the immersion depth d of the applicator pin 7 into the viscous liquid agent 4 and the amount of adhesion to the applicator pin is as shown in FIG. 8, when other conditions are constant. It has been experimentally confirmed that the deeper the d, the greater the amount P of the coating applied to the coating pin. Therefore, as in the example, the viscous liquid agent 4
By changing the thickness of the liquid and supplying it, you can easily adjust the immersion depth d.
By changing the amount, it is possible to control the amount P of adhesion to the applicator pin.

[0032] Experiments have shown that the relationship between the amount P of viscous liquid adhered to the applicator pin and the amount V applied to the workpiece is that, when other conditions are constant, as the amount P increases, the amount V increases. It has been confirmed. Therefore, the coating amount V on the workpiece can be controlled by easily changing the immersion depth d.

Next, another embodiment of the present invention will be described with reference to FIG.

FIG. 9 shows a block diagram illustrating an example of the coating method and coating apparatus of the present invention.
is housed in a container 33 consisting of a cylinder 41 and a piston 42. The cylinder 41 is detachably attached to a support base 43, and the support base 43 is fixed to a surface plate 44. The piston 42 can freely slide inside the cylinder 41, and as the piston 42 moves in the y direction in the xy coordinate system indicated by 30 in the figure, the viscous liquid in the container is pushed out from the discharge port 32. One end of the piston 42 is configured to be able to push and pull, that is, move in the y direction in the figure, by an actuator 45 controlled by the control device 36.

Further, an imaging device such as a television camera 46 is arranged on the side of the discharge port 32, and is connected to an image processing device 38. The television camera 46 is supported by a support stand 47.

A moving mechanism 22 is provided above these, and a moving section (hereinafter referred to as an x-direction moving section) 20 is movable along an x-rail 21 in the x direction of the xy orthogonal coordinates.
Further, a vertical moving section (hereinafter referred to as a y-direction moving section) 49 on the x-direction moving section 20 is movable in the y-direction. An applicator pin 7 is attached to the y-direction moving unit 49 .

Further, a workpiece mounting plate 24 is conveyed by a belt conveyor 23 serving as a workpiece conveyance means. A workpiece 8 to which the viscous liquid agent 4 is to be applied is attached to the workpiece mounting plate 24 .

Although not shown in the drawings, the moving mechanism 22 also includes an xy table that moves in general orthogonal coordinates, and an N
As seen in the C device, it is equipped with a motor, a sensor, and a control, and is configured to be able to move freely in response to control signals from the control device 37.

The image of the vicinity of the discharge port 32 taken by the television camera 46 is processed by the image processing device 38, and the position and shape of the surface of the viscous liquid agent are calculated.

The procedure for applying the viscous liquid agent is performed as follows.

That is, the container 33 containing the viscous liquid agent 4 (in this case, a combination of the cylinder 41 and the piston 42) is attached to the support stand 43 manually or automatically, and the position 28 ( (see FIG. 10 showing a partially enlarged view of the discharge port 32). Surface position 2
8 is below the set value ys, the actuator 45
is activated to push up the piston 42 and push out the viscous liquid 4 from the discharge port 32.

[0042] The surface position 28 of the viscous liquid agent 4 is set at the setting value ys.
The actuator 45 is controlled so that.

Next, the applicator pin 7 is pushed into the viscous liquid agent 4, and the y-direction moving unit 49 is moved so that the applicator pin 7 enters the viscous liquid agent 4 to a predetermined depth yp.
The movement of the moving mechanism 22 is controlled by the control device 37 of the moving mechanism 22. The position of the application pin 7 may be determined by an image from the TV camera 46 or by a sensor provided in the moving mechanism 22. A sensor for detecting the position of the application pin 7 is provided in the x-direction moving unit 20 as a means for measuring the amount of movement of the y-direction moving unit 49, for example.

Next, when the applicator pin 7 to which the viscous liquid agent 4 has adhered is moved upward (in the y direction), a predetermined amount of the viscous liquid agent adheres to the tip of the applicator pin, and the subsequent steps are as shown in FIG.
Transfer the viscous liquid by pressing the applicator pin 7 to which the viscous liquid has adhered in the same capacity as in the example shown in 2 onto the target part 25,
Apply. 4'' in the figure indicates the viscous liquid agent transferred onto the component in this manner.

Furthermore, as shown in FIG. 10, instead of adjusting the position yp of the tip of the applicator pin 7 and the position ys of the surface of the adhesive separately to the measurement reference value, the surface position ys is adjusted each time before pricking the pin. Alternatively, a method may be adopted in which the applicator pin 7 is pushed in by a predetermined amount Δy. By doing this, the viscous liquid 4 is released by the operation of the actuator 45.
The effect of errors that occur when controlling the position 28 of the surface can be reduced. Furthermore, it can be expected that the time required for operation will be shortened. Note that 31 in the drawing represents a reference point on the end surface of the base of the discharge port 32.

In this example, the surface position of the viscous liquid extruded from the outlet of the container containing the viscous liquid agent is measured.
This is a method in which the application pin 7 is immersed in the required amount of liquid. Further, as shown in FIG. 11, the viscous liquid 4 in the syringe 6 is discharged from the viscous liquid supply device 5 onto the viscous liquid discharge plate 16, and as shown in FIG. It is also possible to measure the surface position of the discharged viscous liquid agent 4 and immerse the applicator pin 7 in the required amount of liquid, as in FIG. By applying a required amount of viscous liquid to the application pin 7, the amount V applied to the workpiece can be easily controlled as in the previous embodiment.

[0047] Still another embodiment of the present invention will be described.

FIG. 13 shows the state of the viscous liquid agent 4 adhering to the tip of the applicator pin 7. As shown in FIG. The length S1 of the viscous liquid agent 4 hanging down from the applicator pin 7 is measured using an imaging measuring device 9 such as a television camera. Thereafter, the distance S between the tips of the workpiece 8 and the coating pin 7 and the stopping time t of the coating pin 7 are determined from the required coating amount, and the vertical movement of the coating pin 7 is controlled to maintain the predetermined interval S and stopping time t. , apply the viscous liquid agent 4 to the workpiece 8. Here, the relationship between the distance S between the workpiece 8 and the tip of the coating pin 7 and the coating amount V is shown in FIG. 14, and the relationship between the stop time t of the coating pin 7 and the coating amount V is shown in FIG.
It has been experimentally confirmed that the
If the data of the viscous liquid agent under the conditions of actual use is measured in advance, the application amount V can be easily controlled.

Further, another embodiment of the present invention will be explained. FIG. 16 shows application pins 7A, 7B with different pin diameters,
Rotary applicator pin exchange device 1 that can rotate and exchange 7C
7 shows a method of applying a viscous liquid agent according to No. 7. As mentioned above, when other conditions are the same, the amount of viscous liquid that adheres to the applicator pin largely depends on the circumferential length of the applicator pin. The diameter of the applicator pin is changed by using the same method. It has been experimentally confirmed that the relationship between the application pin diameter d and the application amount V is as shown in FIG. Therefore, the coating amount V can be controlled by selecting coating pins with different pin diameters using the rotary coating pin exchanger 17 and applying the coating according to the required coating amount using the measurement data in advance.

By combining the above coating amount control methods, it becomes possible to control the coating amount with higher precision.

[0051]

Effects of the Invention The present invention allows the applicator pin to be immersed in a viscous liquid to a predetermined thickness by first setting the applicator pin to a predetermined thickness and then hitting the applicator pin to the bottom of that thickness. can be a constant or desired amount without fine control of its position. Second, it is possible to measure the surface position of the viscous liquid and easily change the immersion depth of the applicator pin from the surface, so even if the viscous liquid is not set to a predetermined thickness, the immersion depth of the applicator pin can be kept constant or It can be the desired amount. As a result, the amount of viscous liquid that adheres to the applicator pin can be kept constant or as desired.

Furthermore, by measuring the amount of the viscous liquid agent attached to the pin, the amount applied to the workpiece can be measured. Furthermore, by measuring the amount and position of the viscous liquid applied onto the workpiece, it is possible to check the application status of each workpiece, such as whether or not there is a coating defect. Furthermore, it is now possible to detect changes in the coating state over time or sudden changes in the coating state due to external disturbances when repeatedly coating with an automatic machine, etc., and can detect coating defects and adjust the amount and position of coating. can be controlled.

Furthermore, by controlling the stopping position or stopping time of the tip of the application pin relative to the workpiece, it is possible to apply a constant or desired amount of viscous liquid.

Furthermore, the application pin can be replaced with one having a different peripheral length or cross-sectional area, so that a desired amount of viscous liquid can be applied.

By combining the above viscous liquid supply method and means with the coating amount measuring method and means, and the coating amount controlling method and means, it is possible to provide a stable solution that is resistant to fluctuations in various external and internal conditions. It is possible to apply a viscous liquid and is expected to play a role in preventing equipment failures and malfunctions.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a coating operation using a coating pin.

[Fig. 2] An explanatory diagram of the scraping operation in the present invention

FIG. 3 is an explanatory diagram of an enlarged TV monitor screen of application pins.

FIG. 4 is an explanatory diagram of an enlarged TV monitor screen of a workpiece coated with a viscous liquid agent.

FIG. 5 is an explanatory diagram showing a usage state of an alternative modification of the viscous liquid reservoir.

FIG. 6 is an explanatory diagram of another alternative modification for obtaining the same effect as the viscous liquid reservoir.

FIG. 7 is an explanatory diagram showing the state of use of FIG. 6;

[Figure 8] Characteristic diagram showing the relationship between application pin immersion depth and application amount

FIG. 9 is a block diagram of another embodiment of the invention.

FIG. 10 is a partially enlarged view of the vicinity of the discharge port in FIG. 9;

FIG. 11 is an explanatory diagram showing a state in which the viscous liquid agent is discharged by the viscous liquid agent supply device.

FIG. 12 is an explanatory diagram showing the measurement state of the viscous liquid agent discharged in FIG. 11.

FIG. 13 is an explanatory diagram showing the relationship between the viscous liquid on the applicator pin and the workpiece.

FIG. 14 is a characteristic diagram showing the relationship between the distance between the workpiece and the tip of the application pin and the amount of application.

FIG. 15 is a characteristic diagram showing the relationship between application pin stop time and application amount.

FIG. 16 is an explanatory diagram of the applicator pin exchanging device section.

FIG. 17 is a characteristic diagram showing the relationship between application pin diameter and application amount.

FIG. 18 is an explanatory diagram of a conventional example.

[Explanation of symbols]

2...Viscous liquid supply section 3...Viscous liquid retaining part 4...Viscous liquid agent 7...Applying pin 8...Work 9,9'...Imaging measurement device

Claims (8)

[Claims] 1. A method in which a pin is immersed in a supplied viscous liquid, the viscous liquid is attached to the pin, and the viscous liquid is repeatedly applied to a target workpiece using the pin, the method comprising:
Measuring the amount of the viscous liquid adhered to the pin before and after application to the target workpiece, calculating the amount of the viscous liquid applied to the target workpiece from the difference between the measured values, and applying the viscous liquid to the target workpiece. By measuring the state of application of the viscous liquid to the target workpiece and changing the method of supplying the viscous liquid and the operation method of the pin based on the amount and state of application, the amount of application in the next application can be adjusted. A method for applying a viscous liquid agent characterized by controlling the viscous liquid agent. 2. According to claim 1, the viscous liquid agent is supplied to a concave portion of a member having uneven portions so as to be projected, and the viscous liquid agent supplied to the concave portions is scraped and removed to achieve a predetermined thickness. A method of applying a viscous liquid agent. 3. According to claim 1, the viscous liquid agent is supplied so as to protrude onto a flat surface of the member, and the scraping section is controlled such that the tip of the scraping section is at a predetermined distance from the flat surface. A method for applying a viscous liquid agent, in which the viscous liquid agent is scraped off and removed to provide a predetermined thickness. 4. The method of applying a viscous liquid according to claim 1, wherein the position of the surface of the viscous liquid is detected and measured, and the pin is immersed in the viscous liquid to a predetermined depth. 5. A method for applying a viscous liquid according to claim 1, wherein the pin is immersed in the viscous liquid for different times. Claim 6: In claim 1, 2, 3, 4 or 5,
A method of applying a viscous liquid agent to the target workpiece after dipping the pin, changing the stopping position and/or the stopping time of the pin. 7. The method of applying a viscous liquid according to claim 1, 2, 3, 4, 5 or 6, wherein the pin is immersed in the viscous liquid while changing the peripheral length or cross-sectional area of the pin. 8. A viscous liquid coating apparatus having means for implementing the coating method according to claim 1, 2, 3, 4, 5, 6, or 7.