Curved surface, non-rotating plastic container surface printing process three

The ellipsoidal plastic container has a wide range of uses and is often used in packaging containers such as detergents, shampoos, medicines, and cosmetics. As shown in FIG. 5, the ellipse printing is based on the O point, and the radius R is used for the circular motion. Therefore, the special printing jig shown in FIG. 6 is required. The radius of rotation of the fixture is the radius of the large elliptical surface (printing surface), and the radius of the steel wire disk used for the rotation of the substrate is the radius of the large elliptical surface. The ellipsoid printing method is different from other printing methods. Before the printing of the ellipsoidal substrate, the fixture is first made according to the external dimensions of the ellipsoid, the purpose is to hold the substrate on the substrate support of the printing machine, so that the substrate rotates in synchronization with the ellipsoidal substrate during the printing process. 180°. In addition, the degree of rotation should be adjusted according to the length of the printed pattern surface.

(2) ellipsoidal printing and printing machine debugging

Before printing, first fix the screen plate in the horizontal plane, then put the elliptical substrate into the fixture, shake the substrate lifting bracket on the printer to the top, so that there is a gap between the substrate and the screen. )distance. Then adjust the pressure of the tongue U plate applied to the screen, require moderate pressure, and have a suitable round trip, and also adjust the ink return plate. At last, manually rotate the printing press and adjust the cooperation of the printing machine for the second time. After confirming the accuracy, press the printer again.

(to be continued)