JPS63207646A - Plate registering method in screen printing machine - Google Patents

Abstract

PURPOSE:To enhance an operating efficiency, by a method wherein a plate- registering mark is formed on a screen simultaneously with making a printing pattern in a fixed positional relation, and a relative positional relation between the screen and a matter to be printed is so corrected that a reference line preset on an faceplate and the plate-registering mark are overlaid with each other. CONSTITUTION:On a screen 1, register marks 3 for registering a plate are formed simultaneously with making a printing pattern 2, preferably on two or more points. After a substrate 4 as a matter to be printed is securely loaded on an X-Y-theta table 5, the screen 1 is set, and a TV camera and a TV monitor 11 are turned ON to find whether a cursor line 15 as a reference is coincident with a register mark 3A, i.e. the displayed register mark 3 for registering the screen plate, on the scope of the TV monitor 11. Here, the cursor line 15 having a horizontal line 15x and a vertical line 15y is previously written on the faceplate of the TV monitor. If the cursor line 15 does not coincide with the displayed register mark 3A, the position of the substrate 4 to the screen 1 is so corrected as to be coincident with each other by moving the X-Y-theta table 5, and then the registering is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a plate matching method in screen printing 1yCr11 suitable for printing patterns on printed wiring boards and the like.

(Prior Art) Conventionally, in screen printing devices, the position of the printing pattern (pattern for screen printing in which many minute holes are formed) formed on the screen is aligned every time the plate is changed (screen replaced). Perform a test print to check whether the screen or substrate side is
n-correction was carried out and plate adjustment was carried out.

(Problem to be solved by the invention) However, the above-mentioned test printing work is essentially a wasteful work,
This tends to increase the setup time.

(Means and effects for solving the problem) In view of the above points, the present invention enables correction of the positional relationship between the printing pattern formed on the screen and the printing material with a simple operation so that it is constant. The present invention aims to provide a method for aligning plates in a screen printing apparatus, which eliminates wasted work time such as trial printing when changing plates, and improves the efficiency of screen printing.

The present invention has a configuration in which a screen is pressed against a printing material with a squeegee and paste is adhered to the printing material by movement of the squeegee, and a plate alignment mark is formed on the screen at the same time as the printing pattern in a fixed positional relationship, A camera placed at a fixed position with respect to the printing material captures the plate alignment mark and displays it on a television monitor screen, and corrects the relative positional relationship between the screen and the printing material and presets it on the screen. By overlapping the reference line and the plate alignment mark, the positional relationship between the printing pattern formed on the screen and the printing material can be kept constant, and plate alignment can be easily performed.

(Example) Hereinafter, an example of a plate matching method in a screen printing apparatus according to the present invention will be described with reference to the drawings.

Fig. fjS1 is a plan view of the screen used in the embodiment of the present invention, and Fig. 2 is a side cross section of the X-Y-θ table on which the screen and the substrate as the printing medium are placed, and other constituent parts are shown as blocks. It is a withering diagram shown.

In these figures, cross marks 3 for plate alignment are preferably formed on a screen 1 at a plurality of locations at the same time as the printing pattern (a pattern for screen printing in which many minute holes are formed) 2 is made. . As a result, the positional relationship between the printed pattern 2 and the cross mark 3 is defined with extremely high precision.

The substrate 4 as a printing target is placed on an X-Y-θ table (X,
The screen 1 is placed and fixed on a table S which is movable not only in the Y direction but also in the concave direction in the horizontal plane.
- It is supported and fixed above the θ table 5. For example, the screen 1 is fixed to a base on which an X-Y-θ table 5 is mounted.

A doctor blade (ink returner) 6 is fixed to the print head so that its lower end is at a height that matches the screen, and a squeegee 7 is attached to the print head so that it can move up and down.

Reference numerals 8A and 8B are lens sections (optical systems) of the television camera, respectively, which are connected to the television camera body sections 9A and 9B through lens barrels, optical 7-eyepers, and the like.

The lens portions 8A and 8B are arranged at positions where they can face and photograph the cross mark 3 on the screen side,
It is fixed to the X-Y-θ table 5 side. Video signals from the television camera main units 9A and 9B are connected to a television monitor 11 via an image processing unit 10 that performs processing such as camera switching source, and the television monitor 11 includes a lens unit 8Δ of the television camera, One of the images taken with 8B is selected and displayed.

Next, the operation of the present invention will be explained with reference to the 70-chart of the rjSs diagram and the television monitor screen of FIG. After the substrate 4 as a printing medium is placed and fixed on the XY-θ table 5, the screen 1 is set and the television camera and television monitor 11 are turned on. Then, on the screen of the television monitor 11 in FIG. 4, the user sees the match between the reference cursor line 15 and the cross mark 3A that reflects the cross mark 3 for version matching on the screen. Here, the cursor line 15 has a horizontal fIA 15x and a vertical line 15y, and is written on the television monitor screen in advance. If the cursor #115 and the displayed cross mark 3A do not match, move the X-Y-θ table 5 to
The position of the substrate 4 is corrected and matched, and the plate alignment is completed.

Thereafter, a normal screen printing operation is performed in which the screen 1 is pressed against the substrate 4 as a printing medium using the squeegee 7, and the paste P is attached to the substrate 4 by the movement of the squeegee 7.

By the plate alignment operation as described above, the positional relationship between the printing pattern 2 of the screen 1 and the substrate 4 as the printing medium is accurately defined, the test printing work when replacing the screen can be omitted, and the setup work time can be shortened.

In addition, in the above embodiment, the position of the screen 1 is fixed,
Although plate alignment was carried out by moving the X-Y-θ table 5 on which the substrate 4 was placed, if the substrate was placed on a fixed table, there was a need to use a screwdriver or the like to support the screen 1. A position correction device may be provided to correct the arrangement of the screen 1.

(Effects of the Invention) As explained above, according to the plate matching method in the screen printing apparatus of the present invention, in the configuration in which the screen is pressed against the printing material with a squeegee and the paste is attached to the printing material by the movement of the squeegee, the A plate alignment mark such as a cross is formed on the screen at the same time as the printing pattern in a fixed positional relationship, and a camera placed at a fixed position relative to the printing material captures the plate alignment mark and displays it on a television monitor screen. The relative positional relationship between the screen and the substrate to be printed is corrected so that the predetermined reference line on the screen and the plate alignment mark overlap, so that the printing pattern formed on the screen and It is possible to easily perform plate matching by keeping the positional relationship with the printing substrate constant, and as a result, it is possible to reduce the setup time in screen printing by 9 hours.

[Brief explanation of the drawing]

tjS1 is a plan view of a screen used in an embodiment of the plate matching method in a screen printing apparatus of the present invention, and FIG. 2 is a side cross section of an X-Y-θ table on which a screen and a substrate as a printing medium are placed, and others. The block diagram illustrating the constituent parts of fjSH+ is a 70-chart for explaining the operation, and the figure Pt54 is an explanatory diagram showing the screen of a television monitor. 1... Screen, 2... Print pattern, 3...
Cross mark for plate alignment, 4... Board, 5... X-Y
-θ table, 6...Doctor blade, 7...Squeegee, 8A, 8B...Lens ff1s, 9A, 9
B...TV camera body, 11...TV monitor.

Claims (2)

[Claims] (1) In a screen printing device in which a screen is pressed against a printing material with a squeegee and the paste is adhered to the printing material by the movement of the squeegee, plate matching marks are formed on the screen at the same time as the printing pattern in a fixed positional relationship. , the plate alignment mark is captured by a camera placed at a fixed position with respect to the printing material and displayed on the screen of a television monitor, and the relative positional relationship between the screen and the printing material is corrected and predetermined on the screen. A method for aligning plates in a screen printing apparatus, characterized in that the reference line and the plate alignment mark are superimposed on each other. (2) A plate matching method in a screen printing apparatus according to claim 1, wherein the plate matching mark is a cross mark.