JPH04353448A - Screen printing machine - Google Patents

Abstract

PURPOSE:To provide a flexible screen printing machine not limited in the manufacture of a screen. CONSTITUTION:The positional shift with the confirmation marks 2, 3 on a screen is stored on the basis of the confirmation marks 5, 6 on a substrate 4 and, on the basis of the quantity of the stored positional shift, the position of the screen 1 is corrected to perform printing.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine using recognition correction.

0002

2. Description of the Related Art In recent years, screen printing machines using recognition correction have become mainstream.

An example of a conventional screen printing machine with recognition will be described with reference to FIG.

As shown in the figure, a screen printing machine is divided into a recognition station and a printing station. First, recognition marks 11 and 12 provided on the screen 10
is recognized by the recognition camera 13, and the midpoint M3 between the two points is determined. Next, each time the board 14 is printed, the recognition marks 15 and 16 on the board 14 are recognized by the recognition camera 13, and the midpoint M4 of the two points is determined. Then, the stage section 17 moves to the printing station, but since the amount of movement S of the stage section 17 is constant, when the amount of movement S of the stage section is added to the midpoint M4 of the recognition marks 15 and 16 on the substrate 14, the amount of movement S of the stage section 17 is The representative point R at the printing station is determined. This representative point R is compared with the midpoint M3 of the recognition marks 11 and 12 on the screen, and after the screen is moved in the X, Y, and O directions to match, the printing operation begins. All that was left was to recognize each board 14 and repeat the screen correction.

[0005]

Problem to be Solved by the Invention In such a conventional screen printing machine, the recognition mark 11 on the screen 10 is
and 12 midpoint M3 and recognition marks 15 and 16 on the board 14
Correction is performed by aligning the midpoint M4 of , but in this case, the recognition marks 11 and 12 on the screen 10 and the recognition marks 15 and 16 on the board 14 must be set at the same position. Then, there is a problem that the recognition correction function cannot be used when there is no recognition mark on the screen 10 or when the positions of the recognition marks on the screen 10 and the board 14 cannot be set at the same position.

The present invention solves the above problems and aims to provide a flexible screen printing machine.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the screen printing machine of the present invention includes a recognition mark on the screen, a recognition mark recognized on the substrate, and a recognition camera. storage means for storing the amount of positional deviation between the recognition mark on the screen and the recognition mark on the screen; and correction for correcting the position of the screen based on the amount of positional deviation stored in the storage means. and a printing means that prints after the positional deviation is corrected by the correction means.

[0008]

[Operation] With the above configuration, the screen printing machine of the present invention stores the amount of deviation of the recognition mark position on the screen as data, with reference to the recognition mark on the board, even if the recognition mark positions on the screen and the board are misaligned. This allows processing to be performed by aligning the mark positions on the screen and the substrate.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. As shown in the figure, the recognition marks 2 and 3 on the screen 1 and the recognition mark 5 on the board 4
, 6 are at different positions, the difference is stored in advance as offset data with reference to the recognition marks 5 and 6 on the substrate 4, taking into account the X and Y directions as well. The differences in the figure are +a, +b, -c, and -d. Next, recognition marks 2 and 3 on screen 1 are recognized, and the offset data (+a, +b,
-c, -d), the same positional relationship as the recognition marks 5 and 6 on the substrate 4 can be found on the screen 1, and the representative point M1 (distance from the camera origin 7) which is the midpoint thereof can also be found. Next, recognize the recognition marks 5 and 6 on the substrate 4, find the midpoint M2, add the stage movement amount S, and calculate the difference from the representative point M1 on the screen 1.
The configuration is provided with a means for moving and matching, and then moving to a printing operation.

As described above, according to the screen printing machine of the embodiment of the present invention, in the conventional printing machine, the recognition mark position on the screen and the board had to be the same, but this restriction is eliminated and the range of use is expanded. Can be expanded. In other words, you can set the recognition mark without being particular about what is on the screen, or even if there is no recognition mark on the screen.
It is also possible to use a land as a substitute for a mark.

[0011]

As is clear from the above embodiments, according to the present invention, the amount of displacement of the recognition mark on the screen is stored with reference to the recognition mark on the board, and the screen is adjusted based on this amount of displacement. I am trying to correct it and print it, so
There are no restrictions on screen production, the land can be used in place of the recognition mark, and a more flexible screen printing machine can be provided.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram for explaining a screen printing machine according to an embodiment of the present invention.

[Figure 2] Flowchart of the screen printing machine

[Figure 3]
Schematic diagram for explaining a conventional screen printing machine

[Explanation of symbols]

1 Screen 2, 3 Recognition mark on screen 4 Board 5, 6 Recognition mark on the board 7 Recognition camera

Claims (1)

[Claims] Claim 1: A recognition mark recognized on a screen;
a storage means comprising a recognition mark recognized on a substrate and a recognition camera, and storing an amount of positional deviation between the recognition mark on the screen and the recognition mark on the screen with reference to the recognition mark on the substrate;
A screen printing machine comprising a correction means for correcting the position of the screen based on the amount of positional deviation stored in the storage means, and a printing means for printing after correcting the positional deviation by the correction means.