digital glass printing machine2019-03-07 Industry News
The flat screen printing plate is clamped on the frame by a flat screen curved screen printing machine with a uniform motion, and the substrate placed on the supporting device rotates due to the friction of the screen. The line speed of the curved substrate at the embossing line coincides with the moving speed of the flat screen printing plate to realize the squeegee printing. In theory, the embossed line should be at a very high busbar of the curved substrate to facilitate the increase of the off-grid angle and ensure the printing quality. For the convenience of adjustment, the squeegee generally adopts a 60°±15° apex angle, which is required to be adjusted for the vertical degree and the upper and lower dimensions. Adjusting to vertical is to ensure that the cutting edge line does not produce lateral displacement when adjusting up and down, always aiming at one bus A; using a squeegee with a apex angle of 60 ° ± 15 ° is to ensure the inclination of the squeegee after vertical installation .
In the actual adjustment, in order to ensure that the flat screen printing plate and the curved surface substrate are separated in time, the embossing line can be appropriately biased a little ahead, especially when the diameter of the substrate is large, the embossing line must be biased forward, and the supporting device for the curved surface printing is Various forms of special equipment are designed and manufactured by users according to product requirements. The screen printing of the cylindrical container or the conical container of the glass screen printing machine can adopt two pairs of roller bearings, the cover type of the cover type and the cup type with the ratio of the length to the diameter of less than 1.5, and the soft hollow container can be inflated. Device support. The elliptical surface is approximately a part of the cylindrical surface and can be supported by a cylindrical inlay. The principle of printing on the surface of a cone by a glass screen printing machine is basically the same as that of printing on the surface of a cylinder, except that the graphic shape of the screen printing plate and the movement form of the screen printing plate. When making a screen printing plate for the surface printing of a cone, first draw out the developed surface of the cone surface, and determine the center of the fan shape according to the developed image, and then select the appropriate mesh frame to make the screen printing plate.
On the efgh that can completely accommodate the fan-shaped abed, a plate conforming to the fan shape is produced. Fix the right angle rod on the efgh and install it as a fan-shaped version with o as the axis. Then, like the surface printing of the cylinder, the substrate is supported by four rollers under the plate, the blade is fixed, and the frame is moved in a fan shape, and the surface of the cone plate is printed by pressing the blade. During printing, the conical printing is in line contact with the screen printing plate under a certain blade pressure; when the screen printing plate moves horizontally around the axis of the fan-shaped development view, the substrate is synchronously rotated on the supporting device. Movement; the ink is printed on the surface of the substrate after being pressed by the squeegee to complete the printing.