The GHS35-SW, which is suitable for printing windshields consisting of two sheets of flat glass. Printing takes place on the smaller piece, which rests on top of the larger piece. The windshield arrives already paired on the pre-printing conveyor; subsequently, the two glass parts are picked up on the pre-printing section and transported to the printer via a shuttle system. The sheets are registered in the printing section and held for printing. Afterward, printing takes place and the part is indexed out of the printing section, flowing with the long edge leading. The glass transport system is designed with a “walking beam” shuttle, the bars of which are designed to pass through the printing table and the registration system. A system to hold the glass has been included in the transport system in order to prevent the glass from sliding more than +/-5 mm. The glass registration unit is built under and inside the table. The two glass sheets are registered together in such a way that the top piece registers within +/-0.1 mm. There are six squaring rollers made of hard plastic (easily interchangeable according to the thickness required) and driven (two by two) by three auto-centering units. The system centers the glass on the Y1, Y2 and X axis center lines so that the effect of glass cutting errors on printing is reduced to a minimum. If the screen artwork is not aligned with the glass, the auto-centering unit center line can be moved with the result of moving simultaneously the two rollers (which close the top glass) together. This adjustment is provided for each auto-centering unit. The printing section has been designed as if it were a machine tool. The new concepts ensure planetary of the printing table, parallelism between the different units, rigidity, and therefore very high accuracy. The printing head is fixed, whereas the screen frame is moved up and down for glass feeding clearance. All the standard features of AISA screen printers that make production reliable and very simple have been maintained. The squeegee height adjustment makes it possible to have a precise and effective control of the actual printing angle. In order to allow the screen to be cleaned or inspected, the screen is mounted in a special master frame featuring three openings for the three pins in the machine to which the master frame aligns. These reference points allow the removal of the screen from the printer at any time (e.g. for cleaning and servicing) at a height of about 1200 mm and its reinsertion without losing its reference position.


Technical Data

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