Anodizing color drawing method

Abstract

An anodizing color drawing method includes the steps of providing a metal workpiece; performing an anodic treatment of the metal workpiece to form a coating layer on a surface of the metal workpiece and a plurality of pores on the coating layer; using a plurality of electronic ink-jet nozzles to spray a plurality of dyes by a printing method and the dyes permeate into the pores of the coating layer, and forming a color drawing pattern on the coating layer; and performing a sealing treatment on the coating layer with the color drawing pattern. A color drawing layer processed by the anodic treatment has an enhanced hardness to reduce scratches and damages and maintain the aesthetic look.

What is claimed is: 
     
         1 . An anodizing color drawing method, comprising the steps of:
 providing a metal workpiece;   performing an anodic treatment of the metal workpiece to form a coating layer on a surface of the metal workpiece and a plurality of pores on the coating layer;   using a plurality of electronic ink-jet nozzles to spray a plurality of dyes on the coating layer by a printing method and the dyes permeate into the pores of the coating layer, and forming a color drawing pattern in the coating layer; and   performing a sealing treatment on the coating layer with the color drawing pattern.   
     
     
         2 . The anodizing color drawing method of  claim 1 , wherein the dye comprises a black oil-based solvent ink, a green oil-based solvent ink, a red oil-based solvent ink and a yellow oil-based solvent ink. 
     
     
         3 . The anodizing color drawing method of  claim 1 , wherein the anodic treatment is a decorative anodic treatment, a semi-hard coating anodic treatment, a hard coating anodic treatment, a super hard coating anodic treatment or a lubricated anodic treatment. 
     
     
         4 . The anodizing color drawing method of  claim 1 , wherein the metal workpiece is made of a material selected from aluminum, aluminum alloy, magnesium, magnesium alloy, titanium, titanium alloy, tantalum or tantalum alloy. 
     
     
         5 . The anodizing color drawing method of  claim 1 , wherein the electronic ink-jet nozzle is a piezoelectric ink-jet nozzle, such that when power is turned on, a piezoelectric crystal of the piezoelectric nozzle produces a deformation to squeeze out the dyes. 
     
     
         6 . The anodizing color drawing method of  claim 1 , wherein the electronic ink-jet nozzle is a thermal sensing ink-jet nozzle, such that when power is turned on, the thermal sensing ink-jet nozzle forms bubbles of the dyes, so as to produce a pressure to squeeze out the dyes. 
     
     
         7 . The anodizing color drawing method of  claim 1 , wherein the electronic ink-jet nozzle is a static charge type ink-jet nozzle, such that when power is turned on, the static charge type ink-jet nozzle drives the dye to carry electric charges, and an electric field is controlled to guide a traveling direction of the dye.