JP3877038B2 - Liquid application method and apparatus - Google Patents

Description

[0001]
[Technical field to which industry belongs]
In the present invention, a liquid material, for example, an adhesive, a paste-like or cream-like electronic material, or the like is moved on the surface of a work, which is an adherend, by relatively moving the work and the nozzle so as to have a desired uniform width. The present invention relates to a method and an apparatus for applying a pattern shape.
[0002]
[Prior art]
In general, a liquid material is formed in a desired pattern on the surface of a workpiece, which is an adherend, and a nozzle having a discharge port for discharging liquid is arranged facing the workpiece, which is an adherend. The nozzle and the workpiece are stopped for the point shape while the liquid is discharged from the nozzle by the pressure applied to the syringe that communicates with the nozzle and stores the liquid. This is done by relatively moving at least one of the nozzle and the workpiece.
Also, in order to apply in a uniform shape, it is necessary to keep the liquid pressure during application drawing constant and the relative movement speed of the nozzle and the work to be constant. In this case, the flow rate of the liquid discharged from the discharge port at the tip of the nozzle, and hence the discharge amount of the liquid material per unit time, needs to be constant for each drawing.
[0003]
[Problems to be solved by the invention]
By the way, liquid materials, particularly industrial liquid materials composed of composite materials, are subject to pressure applied to the liquid because the properties of the liquid material itself, such as viscoelasticity, fluidity, and adhesiveness, change over time. Even if it is controlled to be constant, the flow rate of the liquid ejected from the nozzle tip also changes according to the change with time of the above characteristics. It is possible to maintain or improve the pattern shape of the applied and drawn pattern by stopping the equipment every time, measuring the change in the drawn shape, and adjusting the pressure applied to the liquid accordingly. It was necessary.
[0004]
Furthermore, if the history of the environmental conditions in which the liquid material itself is placed is different, the degree of change with time of the above characteristics may also be different. Even in the liquid material produced in the same production lot, the variation is still several tens of percent. Therefore, it is impossible to uniformly define the conditions related to the coating pattern for each product type, and the same test for each liquid material delivery syringe is also unavoidable.
[0005]
Such a shutdown of equipment is a problem that causes a reduction in production capacity and work efficiency, and in addition, frequent changeovers such as in high-mix low-volume production, or liquids with sharp changes in liquid properties. In the case where adjustment is required every short time, as in the case of materials, this is a particularly serious problem.
[0006]
The present invention has been made in view of such problems of the prior art, and the object of the present invention is trial and error for forming a desired application shape for each syringe and periodically. Liquid material discharge method capable of greatly improving the work efficiency by eliminating the need to repeat the test without the need to stop the apparatus for the test, realizing the quantitative discharge of the liquid material easily and quickly, and It is to propose an apparatus comprising the method.
[0007]
[Means for Solving the Problems]
In the method of applying and drawing a predetermined amount of liquid material from a nozzle communicating with the syringe by pressurizing the liquid material in the syringe, the present invention measures a parameter related to the drawing shape of the applied liquid material, and the measured value is desired. The gist of the present invention is a method for applying and drawing a liquid, which is adjusted so as to fall within the allowable range of parameters relating to the prescribed drawing shape, and preferably by adjusting the applied pressure.
In the method of applying and drawing a predetermined amount of liquid material from a nozzle that pressurizes the liquid material in the syringe and communicates with the syringe, the predetermined drawing shape to be desired is a point or a line. Measure the parameters related to the point or line shape of the applied liquid material and adjust the measured value so that it falls within the allowable range of the parameter related to the desired point or line shape, preferably adjust the applied pressure This is a method for applying and drawing a liquid.
[0008]
The parameter relating to the desired specified drawing shape is one parameter selected from the group consisting of a cross-sectional area, a coating width, a coating height, and a coating diameter. In this case, the present invention pressurizes the liquid material in the syringe. In a method of applying and drawing a predetermined amount of liquid material from a nozzle communicating with a syringe, a group consisting of a cross-sectional area, a coating width, a coating height and a coating diameter relating to a drawing shape of the applied liquid material, preferably a dot or line shape One parameter selected from the above is measured, and the measured value is adjusted so that it falls within the range of the specified drawing shape desired, preferably the point or line shape, and within the allowable range of the parameter, preferably the applied pressure is adjusted. This is a method for applying and drawing a liquid.
[0009]
In this case, an allowable range is set for the parameter value related to the desired specified drawing shape, and when the measured value is larger or smaller than the allowable range, adjustment is made so that it falls within the allowable range. In the method of applying and drawing a predetermined amount of liquid material from a nozzle communicating with the syringe by pressurizing the liquid material in the syringe, the present invention relates to a drawing shape of the applied liquid material, preferably a parameter relating to a dot or line shape Measure preferably one parameter selected from the group consisting of a cross-sectional area, coating width, coating height and coating diameter, and when the measured value is larger or smaller than the allowable range, the measured drawing value desired by the measurement value, Adjust the pressure so that it is within the allowable range of the parameter for the shape of the point or line. A coating rendering method of the liquid.
[0010]
The above adjustment is performed by a certain width, and the parameter relating to the drawn shape applied again is measured, and the measurement value is repeatedly adjusted until the measured value falls within the allowable range. In a method for applying and drawing a predetermined amount of liquid material from a nozzle communicating with a syringe by pressurizing the liquid material therein, parameters relating to the drawing shape of the applied liquid material, preferably a point or line shape, preferably a cross-sectional area, Measure one parameter selected from the group consisting of coating width, coating height and coating diameter, and if the measured value is larger or smaller than the allowable range, the measured value is the desired drawing shape, preferably a point or line. Make adjustments so that they fall within the allowable range of the relevant parameters for the shape. To perform measurements of parameters related to the rendering shape, the measured value is adjusted repeatedly until it enters the range of the allowable, preferably applied drawing method of the liquid for adjusting the pressure.
[0011]
Further, the present invention provides a syringe for storing a liquid material, pressure adjusting means for pressurizing or depressurizing the liquid material in the syringe, a nozzle that communicates with the syringe and has a discharge port at a tip, the nozzle, A gist of a liquid application apparatus comprising: a moving means for relatively moving a workpiece; a measuring means for measuring a parameter relating to a shape of the applied liquid material; and a calculation unit for calculating an appropriate pressure from a signal from the measuring means. It is said.
[0012]
The measuring means for measuring the parameters relating to the shape is a measuring means for measuring the application shape of the line width, the cross-sectional area, the application height and / or the application diameter, and in this case, the present invention includes a syringe for storing a liquid material, A pressure adjusting unit that pressurizes or depressurizes the liquid material in the syringe, a nozzle that communicates with the syringe and has a discharge port at a tip, a moving unit that relatively moves the nozzle and the workpiece, and application A liquid coating apparatus comprising: a measuring unit that measures a line width, a cross-sectional area, a coating height, and / or a coating shape of a coating diameter of a liquid material that is applied; and a calculation unit that calculates an appropriate pressure from a signal from the measuring unit .
[0013]
Shift pressure input means for inputting a shift pressure value is provided. In this case, the present invention provides a syringe for storing the liquid material, and a condition for pressurizing or depressurizing the liquid material in the syringe. A pressure means, a nozzle communicating with the syringe and having a discharge port at a tip thereof, a moving means for relatively moving the nozzle and the workpiece, a measuring means for measuring a parameter relating to the shape of the applied liquid material, Preferably, a measuring means for measuring the coating shape of the line width, cross-sectional area, coating height and / or coating diameter, an arithmetic unit for calculating an appropriate pressure from a signal from the measuring means, and a shift pressure input means for inputting a shift pressure value Is a liquid application device.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
In a preferred embodiment of the method of the present invention, a prescribed application shape value including a prescribed application shape value is provided for a desired prescribed application shape value, an upper limit of the prescribed application shape range is an upper limit application shape value, and the prescribed application shape range is When the application shape measurement value obtained by measuring the applied drawing shape is larger than the upper limit application value or smaller than the lower limit application value If the shift pressure value is greater than the upper limit application value, it is low, and if it is less than the lower limit application value, the arbitrary applied pressure is shifted, and the applied drawing shape is measured again. This is a liquid coating and drawing method in which the pressure is adjusted repeatedly until the specified coating shape range is entered.
More specifically, when a predetermined amount of liquid material is applied from a nozzle communicating with the syringe by pressurizing the liquid material in the syringe, the cross-sectional area or application width of the point or line where the liquid material is applied with an arbitrary applied pressure Alternatively, it is a method for applying and drawing a liquid by measuring a coating height or a coating diameter and obtaining a pressing force with respect to a required discharge amount per unit time based on a proportional relationship between the pressing force and a cross-sectional area or a coating width or coating height or a coating diameter. .
[0015]
A preferred aspect of the apparatus of the present invention is a syringe for storing a liquid material, an adjusting means for pressurizing or depressurizing the liquid material in the syringe, a nozzle that communicates with the syringe and has a discharge port at a tip, and the nozzle A moving means for relatively moving the workpiece and the workpiece; a measuring means for measuring a coating shape such as a line width and a cross-sectional area of the applied liquid material, a coating height and a coating diameter; and an appropriate pressure from a signal from the measuring means A liquid application apparatus comprising: a calculation unit that calculates
[0016]
The drawing shape is not particularly limited, and a typical drawing shape is a figure composed of a plurality of line segments. Here, the line segment indicates a portion of a linear body having a drawing shape constituted by drawing lines. When the drawing shape is, for example, the quadrangle of FIG. 2, it is a figure composed of four line segments. The means for forming the drawing shape with the drawing line of the liquid material (paste) comprises a nozzle, a paste, a container for storing the paste, and a paste supply means, and is an apparatus for quantitatively discharging the paste from the container for storing the paste from the nozzle. As long as the method of the present invention can be realized, there is no particular limitation.
[0017]
[Action]
The present invention will be described from the viewpoint of its operation (see flowcharts of FIGS. 4 and 5).
When starting the application drawing operation, or when the liquid in the syringe is exhausted and replaced with a syringe filled with a liquid material, the prescribed application shape value of the drawing line or point constituting the desired drawing pattern, for example, the application cross-sectional area Further, it is necessary to adjust the coating shape value when the liquid material is actually coated on the workpiece surface so that the coating shape value becomes the prescribed coating shape value with respect to the coating diameter, coating height, and coating width.
[0018]
In this operation, a predetermined arbitrary pressure is applied to the liquid, the relative movement speed between the discharge port at the tip of the nozzle and the work surface is made equal to the speed at which the desired shape is actually applied and drawn, Specifically, a line or a point is drawn.
Any coating pattern can be configured by a combination of dots and lines, so that even if the desired coating pattern is complex, it can be adjusted by replacing it with a simple shape, which is simple and quick. Adjustment is possible.
[0019]
The application shape value of an arbitrary part of the drawn line or point is measured, and the application shape measurement value is compared with the desired application shape value, and the application shape measurement value and the specified application shape value are compared. A suitable pressure is calculated from the relationship.
In addition, it is desirable that the application shape is measured at a plurality of positions and statistical processing is performed to calculate a suitable pressure.
[0020]
Although the application shape value and the applied pressure are generally proportional, fine adjustment is required depending on the type of liquid used, application conditions, and environmental conditions.
[0021]
Further, with respect to the prescribed application shape value, a prescribed application shape range is provided with the prescribed application shape value as the center, the upper limit of the prescribed application shape range is the upper limit application shape value, and the lower limit of the prescribed application shape range is the lower limit application shape value. Specified application shape value is defined as the allowable width, and when the application shape measurement value obtained by measuring and measuring a simple shape similar to the above is larger than the upper limit application value or smaller than the lower limit application value, it is predetermined. If the shift pressure value is greater than the upper limit application value, the shift pressure value is lower, and if it is less than the lower limit application value, the desired pressure is shifted, and further drawing is performed. There is also a method of adjusting to a suitable pressure force repeatedly until it enters.
Since this fine adjustment is unnecessary, this method is extremely effective when the relationship between the coating shape value and the applied pressure is unknown.
Also in this method, it is desirable to measure the application shape preferably at a plurality of locations and perform statistical processing to determine whether or not the application shape measurement value is within the specified application shape range.
[0022]
By adjusting the suitable pressure in this way, the adjustment time until coating and drawing can be shortened, the operation can be facilitated, and a desired shape can be rapidly formed.
[0023]
When a certain period of time has elapsed since the start of the coating drawing operation, the characteristics of the liquid material itself change, and the drawing shape is distorted or disturbed. After coating and drawing, a good / bad judgment is made by measuring a coating shape measurement value.
In the present invention, the application shape measurement value measured in the good / bad determination can be used to adjust the pressure to a suitable pressure. Such unnecessary stoppage of the apparatus can be made unnecessary, and a coating pattern having a good shape can be formed continuously and continuously.
[0024]
【Example】
Hereinafter, although one Example of this invention is described based on drawing, the structure of the detail of this invention is not limited by the same Example.
[0025]
Example 1
FIG. 1 is an overview of the present invention, and the base of the coating apparatus includes a horizontal frame portion 20 and a vertical frame portion 21, and a work table 2 is arranged in the X-axis and Y-axis directions on the horizontal frame portion 20. A holding portion 22 that holds the syringe 12 and the like is supported on the vertical frame portion 21 so as to be adjustable in height.
[0026]
In the figure, reference numeral 2 denotes a work table 2 on which a work 1 that is an adherend is placed, which is connected to an X-axis nut 3 that moves an X-axis ball screw 5 that rotates in conjunction with the rotation of the X-axis motor 4. The shaft nut 3 moves in the X-axis direction in proportion to the rotation of the X-axis motor 4. Further, the X-axis unit composed of the X-axis nut 3, the X-axis ball screw 5, and the X-axis motor 4 causes the Y-axis ball screw 9 that rotates in conjunction with the rotation of the Y-axis motor 8 to be proportional to the rotation of the Y-axis motor 8. And connected to a Y-axis nut 7 that moves in the Y-axis direction. With such a mechanism, the work table 2 can freely move in the X-axis direction and the Y-axis direction.
[0027]
In the figure, reference numeral 22 denotes a holding unit that has an application nozzle 23 at the tip and holds the syringe 12 that can be sealed. A camera 18 that monitors the state of the liquid material applied on the workpiece 1 and a side part of the syringe 12 and An image processing unit 19 for processing an image captured by the camera is provided, and image information processed by the image processing unit 19 is sent to the control unit 15.
[0028]
In the above example, the application nozzle 23 is provided integrally with the syringe 12. However, if the application nozzle 23 and the syringe 12 are separated and can be connected and separated using a joint, the syringe 12 is simply replaced. The liquid material can be replenished and the holding portion 22 can be adjusted in the vertical direction (Z-axis direction), so that the distance between the application nozzle 23 and the application surface of the work 1 can be adjusted, and the liquid material can be more accurately adjusted. If the image processing unit 19 is separated from the camera 18 and is arranged outside the vertical frame 21 to process the image signal sent from the camera 18, maintenance of the image processing unit 19 can be performed. Inspection becomes easy.
[0029]
In the present embodiment, the high pressure air supplied from the air source 10 is adjusted to a desired pressure by the dispenser 13, supplied into the sealed syringe 12 through the air tube 11, and applied to the upper surface of the liquid material in the syringe 12. At the time of coating and drawing, the pressure-adjusted pressurized air acts on the liquid material in the syringe 12 through the air tube 11 for a desired time, and the liquid material is discharged from the coating nozzle 23.
[0030]
The liquid material application apparatus of the present invention includes a control unit 15 and an operation unit including a specified application shape value input unit 14, a specified pressure input unit 16, and a shift pressure input unit 17, and the control unit 15 includes: The dispenser 13 is controlled to adjust the pressure of the air supplied into the syringe 12 based on the input information from the input means described later and the image information processed by the image processing unit 19, and the desired application shape is set. The X-axis motor 4 and the Y-axis motor 8 are controlled in order to obtain the specified application shape value input means 14 that constitutes the operation unit, and inputs the specified application shape value relating to the desired application shape, and the specified pressure. The input means 16 inputs a pressure value suitable for the specified application width, and the shift pressure input means 17 inputs a shift pressure value.
[0031]
Next, a coating method using the liquid coating apparatus configured as described above will be described.
When the operation of applying and drawing the liquid material is started, the application shape adjusting operation is performed in order to obtain a shape in which the drawing is designed or desired.
This is because the engineer repeated trial and error tests and adjusted the coating drawing to the desired shape, but in the present invention, by inputting the parameters related to the desired coating shape in advance, It can be done automatically.
[0032]
Example 2
The flow of work related to the adjustment of the coating shape (drawing shape) before the coating work is as shown in the flowchart of FIG.
[0033]
Example 3
Adjustment of the application shape (drawing shape) during the application drawing operation is performed by the following method (1) or (2) (see FIG. 5).
(1) A method of applying and drawing a desired shape and then measuring the shape.
Drawing is not performed during this measurement.
(2) A method in which shape measurement is performed simultaneously while applying and drawing a desired shape.
While the measuring means attached to the rotating mechanism that rotates around the nozzle is performing the coating drawing work, the measuring means is always positioned immediately after the nozzle traveling direction, and the drawing shape immediately after coating is measured. Based on this measurement value, this measurement result is reflected in the drawing work applied to the surface of the next workpiece.
[0034]
【The invention's effect】
As described above, according to the present invention, it is possible to quickly and easily adjust a suitable liquid pressing force applied to the shape of a desired drawing pattern, and further, the properties of the liquid material in a continuous or long-time coating operation. When a change in viscosity, particularly a change in viscosity, can be always corrected to a suitable applied pressure from the value measured for the coating shape, it is unnecessary to stop the device for adjusting the coating shape, Since the adjustment work can be automatically performed, the adjustment by the engineer is not necessary, the variation on the technical ability of the engineer is eliminated, the adjustment can be performed stably, and the adjustment can be performed safely.
[Brief description of the drawings]
FIG. 1 is an overview of the present invention.
FIG. 2 is a drawing showing an embodiment of a drawing shape of an applied liquid material.
FIG. 3 is a drawing showing another embodiment of the drawn shape of the applied liquid material.
FIG. 4 is a flowchart showing a work flow relating to adjustment of a drawing shape before a coating work.
FIG. 5 is a flowchart showing a flow of work related to adjustment of a drawing shape during application drawing work.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Work 2 Work table 10 Air source 11 Air tube 12 Syringe 13 Dispenser 14 Normal application shape value input means 15 Control part 16 Normal pressure input means 17 Shift pressure input means 18 Camera 19 Image processing part 23 Application nozzle

Claims (2)

During operation of the continuous coating rendering the provision drawing line shape with the desired predetermined amount of liquid material to the liquid material from a nozzle which communicates with the pressurizing syringe to the surface of the workpiece which is an adherend in the syringe, the provisions to be desired Set the allowable range for the parameter value related to the drawing line shape , measure one parameter selected from the group consisting of the cross-sectional area, coating width, coating height and coating diameter related to the drawing shape of the applied liquid material. In the drawing operation, when the measured value is larger or smaller than the allowable range , the measured value is desired by increasing / decreasing the pressurization amount of the liquid material in the syringe by the shift pressure value input in advance. The liquid application drawing method for adjusting the value to fall within the allowable range of the parameter relating to the prescribed drawing line shape. A syringe for storing a liquid material; pressure adjusting means for pressurizing or depressurizing the liquid material in the syringe; a nozzle that communicates with the syringe and includes a discharge port at a tip; and the workpiece that is the nozzle and an adherend. Moving means for relatively moving, a measuring means for measuring one parameter selected from the group consisting of a cross-sectional area, a coating width, a coating height and a coating diameter relating to the shape of the applied liquid material, and a value of the parameter An input means for inputting an allowable range and a shift pressure value, and a controller for controlling these operations ;
The control unit pressurizes the liquid material in the syringe and continuously applies and draws a predetermined amount of the liquid material to a desired drawing line shape on the surface of the work, which is an adherend, from the nozzle communicating with the syringe. When the parameter is measured by the measuring means and the measured value is larger or smaller than the allowable range input by the input means in the next work drawing operation, the liquid in the syringe by the pressure adjusting means By adjusting the amount of pressurization of the material by the value of the shift pressure value input in advance, the measured value is adjusted so as to be within the range allowed by the parameter relating to the desired specified drawing line shape. liquid coating device you.

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