JP2004344773A - Viscous fluid coater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coater for coating a work with viscous fluid, which hardly causes the dripping off of the viscous fluid and which realizes high speed and stable coating of the viscous fluid at a low cost by shortening a transfer time. <P>SOLUTION: This coater has a coating head 3 for coating the work 2 with the viscous liquid A, an XY positioning mechanism 4 for positioning in the horizontal direction of the coating head 3 relative to the work 2, and a height direction positioning mechanism 5 for positioning in the height direction of the the coating head 3 relative to the work 2. In the process for coating the work 2 with the viscous liquid A after positioning the coating head A and the work at a prescribed distance, the coating is performed by finely vibrating the coating head 3 by using the height direction positioning mechanism 5 or the XY positioning mechanism 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a viscous fluid application device for applying a viscous fluid such as cream solder onto a work such as a printed circuit board.
[0002]
[Prior art]
A conventional viscous fluid coating apparatus generally includes a coating head that applies a viscous fluid to a workpiece such as a substrate to be coated, a relative XY positioning mechanism between the coating head and the workpiece, and a coating nozzle tip of the coating head and the workpiece. The coating head has a syringe filled with a viscous fluid such as cream solder, and air supply means for sending the viscous fluid from the syringe to a coating nozzle. ing. Then, the viscous fluid is sent to the application nozzle by the air supply by this air supply means, and as shown in FIG. 4, the application nozzle 108 is lowered from the work 102 to a certain distance to perform positioning, and The above-mentioned viscous fluid A is transcribed and applied. In such a viscous fluid coating device, if the transferability is poor due to the characteristics of the viscous fluid, it is necessary to secure a stable time for stopping the nozzle until the viscous fluid is clearly transferred onto the work, It was difficult to shorten the coating cycle.
[0003]
In order to solve this problem, the application cycle was shortened by applying ultrasonic vibration to the application nozzle portion or the work portion to reduce the apparent viscosity and to ensure a good application state of liquid drainage. (For example, see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-5-220433 [0005]
[Problems to be solved by the invention]
However, in order to reduce the apparent viscosity by such ultrasonic vibration and shorten the coating cycle, an ultrasonic vibration device must be separately prepared, and the overall device becomes expensive. Occurs.
[0006]
The present invention is to provide a viscous fluid application device that can sufficiently remove liquid at a lower frequency and has a low total cost, is stable, and has high quality.
[0007]
[Means for Solving the Problems]
A viscous fluid application device of the present invention includes a coating head that applies a viscous fluid to a work, an XY positioning mechanism that horizontally positions the coating head with respect to the work, and a height direction positioning of the coating head with respect to the work. A height direction positioning mechanism for performing, after positioning the application head and the work at a predetermined interval, in the step of applying a viscous fluid to the work, the height direction positioning mechanism causes the application head to vertically vibrate minutely. It is characterized by being applied.
[0008]
In addition, the viscous fluid application device of the present invention includes a coating head that applies a viscous fluid to a work, an XY positioning mechanism that performs horizontal positioning of the coating head with respect to the work, and a height direction of the coating head with respect to the work. A height direction positioning mechanism for positioning, and after positioning the coating head and the work at a predetermined interval, in the step of applying a viscous fluid to the work, the coating head is slightly vibrated in the horizontal direction by the XY positioning mechanism. It is characterized by being applied.
[0009]
In addition, the viscous fluid application device of the present invention includes a coating head that applies a viscous fluid to a work, an XY positioning mechanism that performs horizontal positioning of the coating head with respect to the work, and a height direction of the coating head with respect to the work. Having a height direction positioning mechanism for performing positioning, and after positioning the coating head and the work at a predetermined interval, in a step of applying a viscous fluid to the work, the height direction positioning mechanism moves the coating head vertically. In addition to the minute vibration, the coating is performed by minutely vibrating the coating head in the horizontal direction by the XY positioning mechanism.
[0010]
According to the present invention, in the step of transferring and applying a viscous fluid to a target workpiece, by applying a minute vibration to the application nozzle, the viscous fluid can be quickly and accurately drained from the application nozzle, thereby achieving stable high quality. Can be applied. In addition, since an XY positioning mechanism or a height direction positioning mechanism for positioning the application nozzle is used as means for applying a minute vibration to the application nozzle in the transfer process, a low-cost viscous fluid application device can be used without using another means. Can be provided.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
[0012]
1 and 2, a viscous fluid application device 1 includes an application head 3 that applies a viscous fluid A such as cream solder to a work 2 such as a substrate, and an XY that moves the application head 3 relative to the work 2 in a horizontal direction. It comprises a positioning mechanism 4 and a height direction positioning mechanism 5 for moving the coating head 3 vertically with respect to the workpiece 2. Reference numeral 6 denotes a transport unit that horizontally transports the work 2 to a predetermined position where the coating head 3 performs a coating operation. As shown in FIGS. 1 and 2, the coating head 3 includes a syringe 7 containing a viscous fluid A such as cream solder and an application nozzle 8 for supplying the viscous fluid A to the workpiece 2. Air is supplied from air supply means (not shown). By this air supply, the viscous fluid A is sent from the syringe 7 to the application nozzle 8. The application head 8 is moved integrally by the application head 3 being moved up and down by the height direction positioning mechanism 5 so that the application nozzle 8 is positioned with respect to the work 2. That is, the application nozzle 8 is stopped at a distance of an arbitrary set value from the upper surface of the work 2, and a certain amount of the viscous fluid A is extruded from the application nozzle 8 by an extruder (not shown) housed inside the application nozzle 8. After the application nozzle 8 is stopped above the work 2 for a predetermined time and the viscous fluid A is transferred to the work 2, the application nozzle 8 moves up, and one cycle of the application is completed. Then, as shown in FIG. 3, in the step of transferring and applying the viscous fluid A to the work 2, the application nozzle 8 is basically stopped at a distance of an arbitrary set value from the upper surface of the work 2. Vibration is applied to the viscous fluid A extruded from the application nozzle 8 by causing the height direction positioning mechanism 5 to vibrate vertically (1 to 100 times / second, height amplitude: 1 to 20 μm). In this case, the number of minute vertical vibrations is preferably 1 to 10 times. As a result, the viscous fluid A is quickly drained from the application nozzle 8 so that continuous and stable application can be performed at high speed.
[0013]
Next, a second embodiment of the present invention will be described. The description of the parts common to the first embodiment is omitted. In the present embodiment, in the step of transferring and applying the viscous fluid A to the work 2, the XY positioning mechanism 4 is basically stopped with the application nozzle 8 stopped at a distance of an arbitrary set value from the upper surface of the work 2. Causes the application head 3 to vibrate minutely in the X direction (the Y direction may be used instead of the X direction) (1 to 100 times / sec, horizontal distance amplitude 1 to 20 μm), and the viscous fluid A extruded from the application nozzle 8 Vibration. The number of micro horizontal vibrations at that time is preferably 1 to 10 times. As a result, the viscous fluid A is quickly drained from the application nozzle 8 so that continuous and stable application can be performed at high speed.
[0014]
Further, a third embodiment of the present invention will be described. In the present embodiment, in the step of transferring and applying the viscous fluid to the work 2, the height direction positioning mechanism is used while the application nozzle 8 is basically stopped at a distance of an arbitrary set value from the upper surface of the work 2. 5 is vertically vibrated, and the coating head 3 is slightly horizontally vibrated by the XY positioning mechanism 4 to apply vibration to the viscous fluid A extruded from the coating nozzle 8. As a result, the viscous fluid A is quickly drained from the application nozzle 8 so that continuous and stable application can be performed at high speed.
[0015]
【The invention's effect】
As described above, according to the present invention, in the step of applying a viscous fluid to a target work, by applying a minute vibration to the application nozzle, the viscous fluid can be quickly and accurately drained from the application nozzle at a high speed, and stable. High quality viscous fluid can be applied. In addition, since an XY positioning mechanism or a height direction positioning mechanism for positioning the application nozzle is used as means for applying a minute vibration to the application nozzle in the application process, a low-cost viscous fluid application device can be used without using another means. Can be provided.
[Brief description of the drawings]
FIG. 1 is a perspective view of a viscous fluid application device according to an embodiment of the present invention.
FIG. 2 is a sectional view of a main part of a coating head of a viscous fluid coating device according to an embodiment of the present invention.
FIG. 3 is an explanatory view showing the movement of the coating head.
FIG. 4 is an explanatory view showing the movement of a coating head of a conventional viscous fluid coating device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Viscous fluid coating device 2 Work 3 Coating head 4 XY positioning mechanism 5 Height direction positioning mechanism 8 Coating nozzle A Viscous fluid

Claims (3)

A coating head that applies a viscous fluid to the work; an XY positioning mechanism that positions the coating head in the horizontal direction with respect to the work; and a height direction positioning mechanism that positions the coating head in the height direction with respect to the work. Then, after positioning the application head and the work at a predetermined interval, in the step of applying a viscous fluid to the work, the application is performed by slightly vibrating the application head vertically by the height direction positioning mechanism. Viscous fluid application device. A coating head that applies a viscous fluid to the work; an XY positioning mechanism that positions the coating head in the horizontal direction with respect to the work; and a height direction positioning mechanism that positions the coating head in the height direction with respect to the work. And a step of applying the viscous fluid to the workpiece after positioning the coating head and the workpiece at a predetermined interval, wherein the application head is finely vibrated in the horizontal direction by the XY positioning mechanism to apply the fluid. Coating device. A coating head that applies a viscous fluid to the work; an XY positioning mechanism that positions the coating head in the horizontal direction with respect to the work; and a height direction positioning mechanism that positions the coating head in the height direction with respect to the work. Then, after positioning the coating head and the work at a predetermined interval, in the step of applying a viscous fluid to the work, the coating head is slightly vibrated in the vertical direction by the height direction positioning mechanism, and the coating is performed by the XY positioning mechanism. A viscous fluid coating device characterized in that a head is finely vibrated in a horizontal direction to perform coating.

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