Many years of mechanical products etching technology application summed up the importance of mold etching in the mold making process, mold etching technology has two methods.
(1) using immersion etching ;
(2) the etching solution is injected into the mold-shaped cavity for etching.
No matter what kind of etching method is used, the formulation of the etching solution is the key to maintain a fast etching speed, but also requires a smooth etched surface and small damage to the anti-etching ink. For plastic mold graphics etching commonly used formula is to use nitric acid, phosphoric acid, sulfuric acid to prepare the three acid etching solution, this formula etching speed is moderate, the etched surface smoothness is good, etching solution is stable and can be stored for a long time, while this etching agent for most resist ink have better safety.
Chemical degreasing cleaning method more effective cleaning of the mold surface, while cleaning costs are lower than organic solvents, high safety, but the investment in equipment is larger, for slightly larger molds in the cleaning process also need to have a traveling car. The process of chemical degreasing: mold by receiving - pre-cleaning protective oil - hanging - chemical degreasing - hot water washing - secondary flow water washing - acid washing - Tertiary flowing water washing - self inspection of oil removal effect - passivation - tertiary flowing water washing - hot water washing - drying - under hanging - turn anti-corrosion layer production.