JP2001137756A - Method for applying liquid and device for applying liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and rapidly realize the quantitative discharge of a liquid material. SOLUTION: In a method for pressurizing a liquid material in a syringe and applying a specified amount of the liquid material from a nozzle communicating with the syringe to draw an image, parameters relative to the shape of a drawn image of the applied liquid material, preferably dots or lines, preferably one parameter selected from a group of a section area, an application width, an application height and an application diameter, are measured. Further, the measurements are adjusted so as to allow them to fall within the acceptable value range of the parameters relative to a desired shape of a specified drawn image, and preferably the pressurizing force is adjusted. Thus the method for drawing an image by applying the liquid is performed. The liquid applying device comprises a syringe for storing the liquid material, a pressure regulating means which pressurizes or reduces the pressure of the liquid material in the syringe, a nozzle which communicates with the syringe and has a discharge aperture at the tip, a moving means for moving the nozzle relatively with a work, a measuring means which measures the parameters relative to the shape of the applied liquid material, an arithmetic means which calculates an appropriate pressure upon a signal from the measuring means and preferably a shift pressure input means for inputting a shift pressure value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a liquid material, for example, an adhesive, a paste-like or cream-like electronic material, and the like are moved on the surface of a work to be adhered by moving the work and a nozzle relatively. The present invention relates to a method and an apparatus for applying a pattern having a desired uniform width.

[0002]

2. Description of the Related Art In order to form a drawing pattern of a desired shape on a surface of a work as an adherend, a liquid material is generally formed by:
A nozzle having a discharge port for discharging a liquid at a tip thereof is disposed so as to face a work as an adherend, and the liquid is discharged from the nozzle by a pressure applied to a syringe that communicates with the nozzle and stores the liquid. While discharging, the nozzle and the work are stopped for a point shape, and at least one of the nozzle and the work is relatively moved for a shape other than the point shape.
In addition, in order to apply a uniform shape, it is necessary to maintain a constant liquid pressure during coating and drawing and a constant relative movement speed between the nozzle and the work. States that it is necessary to make 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, constant every drawing.

[0003]

By the way, a liquid material,
Industrial liquid materials, especially composed of composite materials, have a constant pressure applied to the liquid because the properties of the liquid material itself, such as viscoelasticity, flowability, and tackiness, change over time. Even if the control is performed, the flow rate of the liquid discharged from the nozzle tip also changes in accordance with the temporal change of the characteristics, so that in order to stably repeat the coating and drawing, it is actually necessary to install the equipment at regular intervals. It was necessary to maintain or improve the pattern shape applied and drawn by stopping and performing a trial-and-error test in which a change in the drawing shape was measured and the pressure applied to the liquid was adjusted accordingly, thereby performing a trial and error test.

Further, if the history of the environmental conditions in which the liquid material itself is placed is different, the degree of the change over time in the above characteristics may be different, and even a liquid material produced in the same production lot still has several tens of tens. %, It is impossible to uniformly define the conditions for the application pattern for each product type, and the same test for each syringe for delivery of the liquid material has also been inevitable.

[0005] Such a stoppage of the equipment causes a problem of lowering the production capacity and the work efficiency, and is a problem. Further, when the setup is frequently changed as in the case of multi-product small-quantity production, or when the liquid characteristic changes. This is a particularly serious problem when adjustment is required every short time, such as in a steep liquid material.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to form a desired coating shape for each syringe and periodically. Dispensing method of liquid material capable of eliminating the need to repeat the trial and error test, eliminating the need to stop the apparatus for the test, realizing simple and quick quantitative discharge of the liquid material, and greatly improving work efficiency. And to propose an apparatus comprising said method.

[0007]

According to the present invention, there is provided a method of applying a predetermined amount of liquid material from a nozzle communicating with a syringe by pressurizing a liquid material in a syringe. The gist of the invention is a liquid coating / drawing method in which measurement is performed and the measured value is adjusted so as to fall within a value within a range of a parameter relating to a desired prescribed drawing shape, preferably by adjusting a pressing force. 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, in the case where the desired prescribed drawing shape is a point or a line, Measure the parameters related to the shape of the point or line of the applied liquid material, and adjust the measured value to be within the range of the parameter permissible for the desired point or line shape, preferably adjust the pressing force This is a liquid application drawing method.

The parameter relating to the desired prescribed 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.
The present invention relates to a method for applying and drawing a predetermined amount of liquid material from a nozzle communicating with the syringe by pressurizing the liquid material in the syringe, wherein the cross-sectional area relates to the drawing shape of the applied liquid material, preferably to the shape of a point or a line. Measure one parameter selected from the group consisting of a coating width, a coating height and a coating diameter, and set the measured value to a desired defined drawing shape, preferably a value within a permissible range of the parameter with respect to a point or line shape. This is a method for applying and drawing a liquid in which the pressure is adjusted so as to enter, preferably the pressure is adjusted.

An allowable range is provided for a parameter value relating to a desired prescribed drawing shape, and if the measured value is larger or smaller than the allowable range, the parameter is adjusted so as to fall within the allowable range. ,In that case,
The present invention is directed to a 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 drawing shape of the applied liquid material, preferably a parameter relating to the shape of a point or a line, Preferably measures one parameter selected from the group consisting of cross-sectional area, application width, application height and application diameter, and if it is larger or smaller than its allowable range, the measured value is a desired prescribed drawing shape, preferably Is a liquid application / drawing method for adjusting the parameters so as to fall within a range allowed by the parameter relating to the shape of a point or a line, preferably adjusting the pressing force.

[0010] The above adjustment is performed by a predetermined width, and the parameters relating to the applied drawing shape are measured again, and the adjustment is repeatedly performed until the measured value falls within the permissible range. In a 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, a parameter relating to a drawing shape of the applied liquid material, preferably a point or line shape, preferably Measure one parameter selected from the group consisting of cross-sectional area, coating width, coating height and coating diameter, and if it is larger or smaller than the allowable range, the measured value is a desired prescribed drawing shape, preferably a point Alternatively, adjust the line shape so that it falls within the allowable range of the parameter, and make the adjustment in fixed width steps. Perform the measurement of parameters relating to newly coated drawn 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] The present invention also provides a syringe for storing a liquid material, pressure regulating means for pressurizing or depressurizing the liquid material in the syringe, a nozzle communicating with the syringe and having a discharge port at a distal end, and A liquid application device comprising: a moving unit that relatively moves a nozzle and the work; a measuring unit that measures a parameter related to a shape of the applied liquid material; and a calculation unit that calculates an appropriate pressure from a signal from the measuring unit. The device is the gist.

The measuring means for measuring the parameters relating to the shape is a measuring means for measuring a coating shape of a line width, a cross-sectional area, a coating height and / or a coating diameter. A syringe, a pressure regulating unit for pressurizing or depressurizing the liquid material in the syringe, a nozzle communicating with the syringe and having a discharge port at a tip thereof, and a moving unit for relatively moving the nozzle and the work. And a measuring unit for measuring a line width, a cross-sectional area, a coating height and / or a coating diameter of the applied liquid material, and a calculating unit for calculating an appropriate pressure from a signal from the measuring unit. Device.

[0013] The present invention further comprises a shift pressure input means for inputting a shift pressure value. In this case, the present invention provides a syringe for storing a liquid material and a pressurizing or pressurizing liquid material in the syringe. Pressure regulating means for reducing pressure, a nozzle communicating with the syringe and having a discharge port at the tip, a moving means for relatively moving the nozzle and the work, and measuring parameters relating to the shape of the applied liquid material. Measuring means, preferably measuring means for measuring a coating shape of a line width, a cross-sectional area, a coating height and / or a coating diameter, an arithmetic unit for calculating an appropriate pressure from a signal from the measuring means, and a shift for inputting a shift pressure value This is a liquid application device including a pressure input unit.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Preferred embodiments of the method of the present invention
For the desired prescribed application shape value, a prescribed application shape range including the prescribed application shape value is provided, 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, Define the allowable width for the prescribed application shape value, and when the application shape measurement value that measures the applied drawing shape is larger than the upper limit application value or smaller than the lower limit application value, the value of the predetermined shift pressure value is set to the upper limit If the applied value is larger than the lower applied value, lower the applied value, shift the applied pressure higher, measure the applied drawing shape again, and repeat until the applied shape measured value falls within the specified applied shape range. This is a liquid application / drawing method for adjusting the pressing force. More specifically, in applying a predetermined amount of the liquid material from a nozzle communicating with the syringe by pressurizing the liquid material in the syringe, a cross-sectional area or a coating width of a point or a line where the liquid material is applied by an arbitrary pressing force Or, a liquid application drawing method in which a coating height or a coating diameter is measured and a pressing force with respect to a required discharge amount per unit time is obtained based on a proportional relationship between a pressing force and a sectional area or a coating width or a coating height or a coating diameter. .

A preferred embodiment of the apparatus according to the present invention includes a syringe for storing a liquid material, an adjusting means for pressurizing or depressurizing the liquid material in the syringe, and a nozzle which communicates with the syringe and has a discharge port at a tip. Moving means for relatively moving the nozzle and the work, measuring means for measuring a coating shape such as a line width and a cross-sectional area of the applied liquid material and a coating height and a coating diameter, and a signal from the measuring means. And a calculation unit for calculating an appropriate pressure from the liquid application device.

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 refers to a linear portion of a drawing shape composed of drawing lines. If the drawing shape is, for example, a square in FIG. 2,
This is a figure composed of four line segments. The means for forming the drawing shape with the drawing lines of the liquid material (paste) includes a nozzle, a paste, a container for storing the paste, and a paste supply means, and is an apparatus for discharging a fixed amount of the paste from the container for storing the paste from the nozzle. There is no particular limitation as long as the method of the present invention can be realized.

[0017]

The present invention will be described in terms of its operation (FIG. 4,
5). When starting a coating drawing operation, or when replacing the syringe with a liquid filled with liquid material in the syringe, a prescribed coating shape value of a drawing line or a point constituting a desired drawing pattern, for example, a coating cross-sectional area In addition, it is necessary to adjust the application shape value when the liquid material is actually applied onto the work surface with respect to the application diameter, the application height, and the application width so as to be the specified application shape value.

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, and the operation is simplified. Draw a simple shape, specifically a line or a point. Since any coating pattern can be constituted by a combination of dots and lines, even if the desired coating pattern has a complicated shape, it can be replaced with a simple shape and adjusted, and thus simple and quick. Adjustments are possible.

The coating shape value of an arbitrary portion of the drawn line or point is measured, and it is compared whether the measured coating shape value is the desired specified coating shape value. A suitable pressing force is calculated from the relationship with the shape value. In addition, it is preferable that the measurement of the application shape is performed at a plurality of places, and that a statistical processing is performed to calculate a suitable pressing force.

Although the coating shape value and the pressing force are roughly proportional, fine adjustment is required depending on the type of liquid used, coating conditions and environmental conditions.

In addition, a prescribed coating shape range is set with respect to the prescribed coating shape value with the prescribed coating shape value as the center, and the upper limit of the prescribed coating shape range is the upper limit coating shape value, and the lower limit of the prescribed coating shape range is the lower limit coating shape. As a value, the width allowed in the prescribed application shape value is determined, and the application shape measurement value obtained by performing application of the same simple shape as described above and measuring this is larger than the upper limit application value or smaller than the lower limit application value, A predetermined shift pressure value is shifted by an arbitrary pressing force lower than the upper limit application value when the value is larger than the upper limit application value, and higher when the shift pressure value is lower than the lower limit application value, and further measured by drawing. There is also a method of repeatedly adjusting the pressure to a suitable pressure until the pressure falls within the coating shape range. This method is extremely effective when the relationship between the coating shape value and the pressing force is unknown because the fine adjustment is unnecessary. Also in this method, it is preferable that measurement of the application shape is performed at a plurality of locations and statistical processing is performed to determine whether or not the measured value of the application shape is within a specified application shape range.

By adjusting the suitable pressing force in this way, the adjustment time until coating and drawing is performed can be shortened, and the work can be facilitated, so that a desired shape can be formed quickly. it can.

When a certain period of time has elapsed since the start of the coating / drawing operation, the characteristics of the liquid material itself change, causing distortion or disturbance in the drawing shape.
After one workpiece or a specified number of workpieces are applied and drawn, the measurement of the applied shape is measured to determine good or bad. In the present invention, since the applied pressure can be adjusted to a suitable pressing force by using the application shape measurement value measured in the good / bad determination, since adjustment can be performed for each good / bad determination,
Unnecessary stoppage of the apparatus for adjusting the drawing shape is unnecessary, and a coating pattern having a good shape can be continuously and continuously formed.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, but the detailed structure of the present invention is not limited to the embodiment.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings, but the detailed configuration of the present invention is not limited to the embodiment. FIG. 1 is a schematic view of the present invention. The base of the coating apparatus includes a horizontal frame 20 and a vertical frame 21, and the work table 2 is mounted on the horizontal frame 20 in the X-axis and Y-axis directions. The holding portion 22 for holding the syringe 12 and the like is supported on the vertical frame portion 21 so as to be adjustable in height.

In the drawing, reference numeral 2 denotes a work table 2 on which a work 1 to be adhered is placed, which is connected to an X-axis nut 3 which moves an X-axis ball screw 5 which rotates in conjunction with the rotation of an X-axis motor 4. The X-axis nut 3 moves in the X-axis direction in proportion to the rotation of the X-axis motor 4. X-axis nut 3 and X
An X-axis unit including an axis ball screw 5 and an X-axis motor 4 moves a Y-axis ball screw 9 that rotates in conjunction with the rotation of the Y-axis motor 8 in the Y-axis direction in proportion to the rotation of the Y-axis motor 8. It is connected to a Y-axis nut 7. With such a mechanism, the work table 2 can freely move in the X-axis direction and the Y-axis direction.

In the drawing, 22 is provided with a coating nozzle 23 at the tip,
A holding part for holding the sealable syringe 12, a camera 18 for monitoring the state of the liquid material applied on the work 1, and an image processing part for processing an image taken by the camera, at a side portion of the syringe 12. The image information processed by the image processing unit 19 is sent to the control unit 15.

In the above example, the application nozzle 23 is connected to the syringe 1
Although the example in which the coating nozzle 23 and the syringe 12 are integrally provided has been described, if the coating nozzle 23 and the syringe 12 are separated and the connection and disconnection thereof can be performed using a joint, the liquid material can be replenished only by replacing the syringe 12, and When the holding unit 22 is configured to be adjustable in the vertical direction (Z-axis direction), the distance between the application nozzle 23 and the application surface of the work 1 can be adjusted, and more accurate application of the liquid material can be performed. If the image processing section 19 is provided separately from the camera 18 and is provided outside the vertical frame 21 so as to process the image signal sent from the camera 18, maintenance and inspection thereof can be facilitated.

In this embodiment, the high-pressure air supplied from the air source 10 is adjusted to a desired pressure by the dispenser 13, supplied to the closed type syringe 12 through the air tube 11, and the liquid material in the syringe 12 is supplied. During application and drawing, the pressure-regulated and pressurized air acts on the liquid material in the syringe 12 via the air tube 11 for a desired time to discharge the liquid material from the application nozzle 23. Let it.

The liquid material coating apparatus of the present invention includes a control unit 15 and an operation unit including a specified coating shape value input unit 14, a specified pressure input unit 16, and a shift pressure input unit 17. The unit 15 controls the dispenser 13 to adjust the pressure of the air supplied into the syringe 12 based on input information from an input unit described later and image information processed by the image processing unit 19, The X-axis motor 4 and the Y-axis motor 8 are controlled in order to obtain a coating shape, and a specified coating shape value input means 14 constituting an operation unit inputs a specified coating shape value relating to a desired coating shape. The specified pressure input means 16 inputs a pressure value suitable for a specified application width, and the shifted pressure input means 17 inputs a shift pressure value.

Next, a coating method using the liquid coating apparatus configured as described above will be described. When the operation of applying and drawing a liquid material is started, an application shape adjustment operation is performed to make the drawing a designed or desired shape.
In this, the technician repeated trial and error tests to adjust the coating and drawing to the desired shape, but in the present invention, by inputting parameters relating to the desired coating shape in advance, Can be done automatically.

Example 2 The flow of the operation for adjusting the coating shape (drawing shape) before the coating operation is as shown in the flowchart of FIG.

Embodiment 3 The coating shape (drawing shape) during the coating / drawing operation is adjusted by the following method (1) or (2) (see FIG. 5). (1) A method of performing coating drawing of a desired shape, and thereafter measuring the shape. No drawing is performed during this measurement. (2) A method of simultaneously performing shape measurement while performing application drawing of a desired shape. The measuring unit attached to the rotating mechanism that rotates about the nozzle is arranged so as to always be located immediately after the nozzle in the advancing direction during the coating / drawing operation, and measures the drawing shape immediately after the coating. Based on this measured value, the result of this measurement is reflected in a drawing operation to be applied to the surface of the next work.

[0034]

As described above, according to the present invention, it is possible to quickly and easily adjust a suitable liquid pressure applied to a desired drawing pattern shape. Changes in the properties of liquid materials,
Especially, when the viscosity changes, the applied pressure can always be corrected to a suitable pressing force from the measured value of the applied shape, so it is not necessary to stop the apparatus for adjusting the applied shape, and furthermore, the adjustment work is not required. Since the adjustment can be performed automatically, the adjustment by the technician is not required, the variation in the technical ability of the technician is eliminated, the adjustment can be performed stably, and the adjustment can be performed safely.

[Brief description of the drawings]

FIG. 1 is a schematic view of the present invention.

FIG. 2 is a drawing showing one embodiment of a drawing shape of a liquid material applied.

FIG. 3 is a drawing showing another embodiment of the drawing shape of the applied liquid material.

FIG. 4 is a flowchart showing a flow of work related to adjustment of a drawing shape before a coating work.

FIG. 5 is a flowchart showing a work flow relating to adjustment of a drawing shape during a coating drawing operation.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 work 2 work table 10 air source 11 air tube 12 syringe 13 dispenser 14 prescribed coating shape value input means 15 control unit 16 prescribed pressure input means 17 shift pressure input means 18 camera 19 image processing unit 23 coating nozzle

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01L 21/52 H01L 21/52

Claims (9)

[Claims] In a method for applying and drawing a predetermined amount of a liquid material from a nozzle communicating with a syringe by pressurizing a liquid material in a syringe, a parameter relating to a drawing shape of the applied liquid material is measured, and the measured value is a desired value. A liquid application / drawing method for adjusting the value so as to fall within a range of an allowable range of the parameter regarding the prescribed drawing shape. 2. The method according to claim 1, wherein the desired prescribed drawing shape is a point or a line. 3. The method according to claim 1, wherein the parameter relating to the desired prescribed 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. . 4. An allowable range for a parameter value relating to a desired prescribed drawing shape, and if the measured value is larger or smaller than the allowable range, adjustment is made so that the measured value falls within the allowable range. Item 1, 2 or 3
Liquid drawing method. 5. The liquid application according to claim 4, wherein the adjustment is performed by a fixed width at a time, parameters of the applied drawing shape are measured again, and the measurement is repeated until the measured value falls within the allowable range. Drawing method. 6. The method according to claim 1, wherein the adjustment is performed by adjusting a pressing force. 7. A syringe for storing a liquid material, pressure regulating means for pressurizing or depressurizing the liquid material in the syringe,
A nozzle that communicates with the syringe and has a discharge port at the tip,
A liquid comprising: a moving unit that relatively moves the nozzle and the workpiece; a measuring unit that measures a parameter related to a shape of the applied liquid material; and a calculation unit that calculates an appropriate pressure from a signal from the measuring unit. Coating device. 8. The liquid coating apparatus according to claim 7, wherein the measuring means for measuring the parameters relating to the shape is a measuring means for measuring a coating shape of a line width, a sectional area, a coating height and / or a coating diameter. 9. The liquid application apparatus according to claim 7, further comprising a shift pressure input means for inputting a shift pressure value.