JPH05329423A - Applying device - Google Patents

Abstract

PURPOSE:To provide a stable applying device of high precision, by which mechanical errors are corrected. CONSTITUTION:A cartridge 1 filled with an adhesive 11, means 6, 7 for holding the cartridge 1 to drive it in the X and Y directions and in the theta direction to a substrate 4, a recognizing camera 3 for detecting the position and form of application and a calculating part for controlling the position of an applying nozzle 2 in the X, Y and theta directions from the detected result are provided. When the cartridge 1 is replaced, attached or detached because of running out of material, etc., the applying position by the applying nozzle 2 is detected to correct the dislocation of the X, Y and theta.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating apparatus suitably used for applying an adhesive or the like applied to hold a component during electronic circuit assembly.

[0002]

2. Description of the Related Art Conventionally, in the process of assembling a printed circuit board (hereinafter referred to as a substrate), when temporarily fixing a component such as an IC, an adhesive is applied to the substrate and then the component is mounted on the substrate. In recent years, in the adhesive coating device, the demand for coating accuracy has increased with the miniaturization of parts.

[0003]

However, it is difficult to increase the coating accuracy above a certain level because the conventional coating apparatus does not have means for finely adjusting the coating position. Particularly, the cartridge filled with the adhesive is replaced. Since it is not possible to adjust the slight mechanical deviation that occurs in some cases, it is difficult to ensure coating accuracy that corresponds to the miniaturization of parts,
There has been a problem that the adhesive adheres to the electrode of the component due to the slightest deviation of the coating position, resulting in defective soldering.

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a coating apparatus capable of reading a coating position by a nozzle of a cartridge and coating with high precision.

[0005]

A coating apparatus according to the present invention comprises a cartridge filled with a coating material, a means for holding a work to be coated, a cartridge holding the cartridge and driving the work in XY and θ directions. Means, a means for detecting the coating position and the shape, and a means for controlling the position of the nozzle at the tip of the cartridge in the XY and θ directions according to the detection result.

[0006]

According to the present invention, with the above-described structure, when the cartridge is exchanged / removed due to a material shortage or the like, the coating position by the nozzle is detected, and the X, Y, and θ deviation amounts are position-corrected, so that stable and high-accuracy is always achieved. Application can be achieved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A coating apparatus according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a schematic structure of a coating apparatus according to an embodiment of the present invention. Reference numeral 1 is a cartridge in which a substrate 4 is filled with an adhesive 11 to be applied, 2 is an adhesive application nozzle formed at the tip of the cartridge 1, and 3 is a recognition camera for detecting the position and shape of the applied adhesive. ..
The cartridge 1 and the recognition camera 3 are arranged on the X-axis table 6. Further, the application direction θ of the application nozzle 2 is θ
The shaft drive means 8 (a specific structure is not shown, only its rotation axis is shown) is freely controllable around the axis. On the other hand, the substrate 4 to which the adhesive is applied and the discarding area 5 in which the adhesive is discarded and detected by the recognition camera 3 are arranged on the Y-axis table 7.

FIG. 2 shows a shape of an adhesive agent using a typical coating nozzle 2. In addition, the application shape and position are in the application direction θ.
It depends on.

FIG. 3 shows a control block diagram. The recognition camera 3 recognizes the application position and shape of the adhesive, and the arithmetic unit 9
The X, Y, and θ axes are corrected and calculated, and the driver 10 controls the X axis table 6, the Y axis table 7, and the θ axis drive means 8 based on the results.

FIGS. 4A, 4B and 4C show how the coating position of the coating nozzle 2 is displaced when the coating direction θ is changed to 0 °, 90 ° and −90 °. That is, due to mechanical variations, even when θ = 0 °, there is a slight variation in coating position a and an inclination angle α as shown in (a). When the coating direction θ is changed, the tip of the coating nozzle 2 is displaced due to mechanical eccentricity or the like.
When it is set to 0 °, as shown in (b), the dispersion of the coating position is b ₁ , the inclination angle is β ₁ (= 90 ° + α), and θ = −
When the angle is 90 °, the variation in the coating position is b ₂ and the inclination angle is β ₂ (= 90 ° -α) as shown in (c). still,
Since the range in which the coating direction θ is changed corresponds to the direction of the component mounted on the substrate, it may be supported in the range from −90 ° to + 90 °.

FIG. 5 shows a state in which the variation amount Δ (X, Y) of the coating position changes due to the change of the coating direction θ. That is, in FIG. 5, the horizontal axis represents the coating direction θ and the vertical axis represents the variation amount Δ (X, Y) of the coating position, and the coating direction θ is θ = 0 °.
And θ = 90 °, the dispersion amount Δ (X,
Y) changes proportionally between a and b ₁ , and θ = 0 ° and θ =
In the range of −90 °, the variation Δ (X, Y) of the coating position changes proportionally between a and b ₂ .

Next, the control method will be described with reference to the flowchart of FIG.

When the cartridge 1 is attached or detached, or when the cartridge 1 is replaced by running out of the adhesive, the coating position slightly changes due to the mechanical variations and eccentricity as described above. Therefore, the discarding is performed in the discarding area 5 at θ = 0 °, and the coated state is measured by the recognition camera 3 for the center a and the inclination α of the coating nozzle 2. Similarly, in the discarding area 5, a different location from the previous time is ejected at θ = 90 °, and the recognition camera 3 measures the center b ₁ and the inclination β ₁ of the coating nozzle 2. Similarly, the center b ₂ and the inclination β ₂ of the coating nozzle ₂ are measured at θ = −90 °. Thus, the deviation amount Δ (X, Y) and the inclination Δ in the arbitrary coating direction θ
Since θ is represented by the following equation, the calculation unit 9 calculates each application point according to the application direction θ, and corrects the position by the deviation amount.

Δ (X, Y) = a + (b ₁ −a) θ / 90 (0
≦ θ ≦ 90) Δ (X, Y) = a− (b ₂ −a) θ / 90 (−90
<Θ <0) Δθ = α

[0016]

According to the present invention, the cartridge filled with the coating material as described above, the means for holding the work to be coated, and the XY for the work while holding the cartridge.
Direction and θ direction, means for detecting the coating position and shape, and means for position control of the nozzle position of the tip of the cartridge in the XY direction and θ direction according to the detection result, so as to prevent the material from running out. Detects the position of the coating nozzle when replacing or attaching / removing the cartridge, and X, Y, θ
By correcting the deviation amount of the position, it is possible to always realize stable and high-precision coating.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a coating apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a coating shape of a representative adhesive and its change depending on a coating direction in the example.

FIG. 3 is a control block diagram of the embodiment.

4A and 4B show the deviation of the coating position when the coating nozzle is directed in a predetermined coating direction in the same embodiment. FIG. 4A shows a case where the coating direction θ is 0 °, and FIG. In the case (2), (c) is an explanatory diagram showing the amount of deviation of the application position when the application direction θ is −90 °.

FIG. 5 is an explanatory diagram showing how the coating position is displaced depending on the coating direction in the example.

FIG. 6 is a flowchart of operations / calculations at the time of replacement / attachment / detachment of the cartridge in the embodiment.

[Explanation of symbols]

 1 Cartridge 2 Coating Nozzle 3 Recognition Camera 6 X-Axis Table 7 Y-Axis Table 8 θ-Axis Driving Means 9 Computing Unit

Claims (1)

[Claims] 1. A cartridge filled with a coating material, a means for holding a work to be coated, a means for holding the cartridge and driving the work in XY and θ directions, and detecting a coating position and shape. An applicator comprising: a means and a means for controlling the position of the nozzle at the tip of the cartridge in the XY and θ directions based on the detection result.