The influence of extrusion process on oxidation coloring is mainly the influence of mold/die design, extrusion temperature, extrusion speed and cooling method on the surface state and tissue uniformity of extruded profiles. Mold design should be able to make the material fully fit, otherwise, it is easy to appear bright (dark) with defects, the same profile may appear on the color separation; At the same time, the mold/die state and profile surface extrusion pattern also affect the oxidation coloring. Extrusion temperature, speed, cooling and cooling time are different so that the profile is not uniform but also produce color. Anodic oxidation has important influence on electrolytic coloring of chromatic aberration, especially in the process of vertical oxidation production line is easy to appear the two color, vertical oxidation groove depth of 7.5 m, bath and easy to produce temperature difference, temperature has important effect on the anodic oxidation, high temperature, li...
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