JPS61123543A - Positioning method of plate in screen printer - Google Patents

Abstract

PURPOSE:To position a matter to be printed accurately with a test printing of one time by positioning the former which was test printed with a fixing stand of the former is displaced and positioning is carried out by registering to a reference point after the former which was test printed is projected to a monitor television by a video camera. CONSTITUTION:A matter 6 to be printed is attracted to a stand 5 of the former by vacuum, and the video cameras 8, 9 for detecting both the right and the left side ends are arranged, and being connected to the monitor televisions 11, 12 through an electronic line generator 10 respectively. A plate 1 is fixed to a plate fixing section 2, a test printing is carried out with the fixing stand 5 of the matter to be printed is displaced to point A, a printed picture of the matter to be printed is projected to the monitor television with the former is displsced to point B, and a reference point of the monitor television is brought into line with that of the picture. Then, a master printing being printed accurately is exchanged with the matter to be printed for test printing and is fixed to the fixing stand of the matter to be printed, and the former stand is displaced such that the reference point of the monitor television is brought into line with that of the picture.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a plate matching method for a screen printing machine.

[Background of the invention]

In a printing operation using a screen printing machine, a plate that matches the printing purpose is fixed to a plate fixing part of the printing machine, and then the plate and the substrate to be printed are aligned. This method of aligning the printing plate and the printing material moves the printing material or the printing plate to adjust the amount of deviation. The present invention is directed to the former method of moving and aligning the printing substrate. For reference, the latter method of moving and aligning the plate is shown in, for example, JP-A-56-1.
The one shown in Japanese Patent No. 48560 is known.

Conventionally, the former method of moving and aligning the printed material involves fixing the plate, making a test print, measuring the amount of deviation of the printed material from the reference position using a projector, etc., and then adjusting the position based on this amount of deviation. Move and align the fixing base of the printing material. However, this method has the problem that it is not possible to match IEt4 and r4 without repeating the above-mentioned operations several times, and that a large amount of adjustment time is required for plate replacement, reducing the operating rate of the printing press.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a plate matching method for a screen printing press that can shorten the plate exchange time and improve the operating rate of the printing press.

[Summary of the invention]

In order to achieve the above object, the present invention horizontally moves and raises a printing material fixing base to which a printing material is fixed relative to a plate fixing part to which a plate is fixed, so that the printing material can be placed at a printable position ( After that, the printing material fixing table is lowered and horizontally moved relative to the board fixing part in the opposite way to the above, the printing material is positioned below the video camera, and the printing material is observed with this video camera. Project the printed image of the printed material to be printed onto a monitor TV, align the reference point of the monitor TV with the reference point of the printed material projected on the monitor TV, and then transfer the accurately printed master printed material to the test printing material. The invention is characterized in that the printing material is fixed to a fixing base in exchange with the fixing base of the printing material, and the fixing base of the printing material is moved so that the reference point of the image matches the reference point of the monitor television.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.As shown in FIG. 1, a plate 1 is fixed to a plate fixing part 2# of a screen printing machine. A guide rail 3 is disposed horizontally below the plate fixing part 2, and a guide rail 31ζ conveyance table 4 is slidably provided.

Therefore, the conveyance table 4 can be reciprocated between a point A below the plate 1 fixed to the plate fixing part 2 and a point B distant from the plate 1. A printing material fixing table 5 is provided on the conveyance table 4 so as to be movable up and down, and a positioning pin 7 for positioning a liquid crystal display element 6, which is a printing material, is implanted in the printing material fixing table 5.

Although not shown, the liquid crystal display element 6 is vacuum-adsorbed onto the substrate fixing table 5. A video camera 8.9 for detecting both left and right ends of the liquid crystal display element 6 is disposed above the printing substrate fixing plate 5 at point B, and the video camera 8.9 is connected via an electronic line generator IO. and are connected to monitor televisions 11 and 12, respectively. Furthermore, the video cameras 8 and 9 are movable in consideration of work efficiency, and are moved outside the work range after the positioning is completed.

As shown in FIG. 2, the printing substrate fixing table 5 is moved in the rLXL direction, the Y direction, and the θ direction using an X direction adjustment knob 13, a Y direction adjustment knob 14, and a θ direction adjustment knob 15, respectively. It is now possible to do so.

Next, the plate matching method will be explained. The plate 1 is roughly aligned and fixed to the plate fixing part 2 by visual inspection. Print material fixing table 5
With the liquid crystal display element 6 positioned at point B, the liquid crystal display element 6 for test printing is positioned on the substrate fixing table 5 based on the positioning pins 7, and fixed by vacuum suction. The printing material fixing table 5 is moved to point A and then raised to lift the liquid crystal display element 6 to a position where printing is possible. Then print. Next, the substrate fixing table 5 is lowered and moved to point B. Then, both ends of the liquid crystal display element 6 are observed with a video camera 8.9, and the observed printed image is sent to a third
The figure is projected on the monitor television 11, 12 as shown.

Set the reference points 6a and 6b on the town printing screen on each monitor TV 11 and 12, and set the reference points 6a and 6b respectively.
bt(-#L child 4 frame Monitor TV 11, 12 X life 11a, 12a and Y life y 11b. 12b intersection points 11c. Replace it with the liquid crystal display element 6 and fix it in a fixed position on the substrate fixing base 5. Then, while watching the image of the master element displayed on the monitor TVs 11 and 12,
1 12a and Y lie:/llb.

Adjustment knobs j13, 14, and 15 are adjusted to align the respective reference points of the image of the mass goo element with the intersections 11c and 12c of the 12b. As a result, the alignment of the substrate fixing base 5 is completed, and the relative positions of the liquid crystal display element 6 and the plate 1 match, so that printing work can be started immediately.

In the above embodiment, the substrate fixing table 5 is provided so as to be movable horizontally and vertically, but the plate fixing section 2 may be provided movably horizontally and vertically.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, accurate alignment can be achieved by performing only one trial printing, so that the plate replacement time can be shortened and the operating rate of the printing press can be improved.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, la) is a plan view, and (la) is a plan view.
bl is a front view, Figure 2 is a plan view of the substrate fixing table, Figure 3 is
The figure is an explanatory diagram of an image of a monitor television. 1... Plate, 2... Board fixing part, 3... Guide rail, 5... Printing material fixing stand, 6
...Liquid crystal display element, 6a, 6b...reference point,
8.9...Video camera, 11.12...Monitor TV, 11c, 12c...Intersection. Figure 1

Claims (1)

[Claims] horizontally moving and raising the printing material fixing table to which the printing material is fixed relative to the plate fixing part to which the plate is fixed, positioning the printing material at a position where printing is possible, and performing trial printing;
Then, contrary to the above, the printing material fixing table is lowered and horizontally moved relative to the plate fixing part to position the printing material below the video camera, and the printed image of the printing material observed by this video camera is monitored. Project it on the TV, align the reference point of the monitor TV with the reference point of the printed material projected on this monitor TV, then replace the accurately printed master printed material with the sample printed material and fix it on the printed material fixing base. A method for aligning plates for a screen printing press, characterized in that a fixing base for a substrate to be printed is moved so that a reference point of an image matches a reference point of a monitor television.