Anodic oxidation dyeing process for multi-blind hole aluminum extruded section product

Abstract

The invention relates to an anode oxidating dyeing technique of aluminium extruded section product with a plurality of blind holes which has steps as follows: loading, removing oil, washing with clean water, washing and spraying, corrupting with alkali, washing with clean water, washing and spraying, cleaning with ultrasonic, washing with pure water, anode oxidating, cleaning, cleaning and spraying, washing with pure water, processing before dyeing, washing with pure water, dyeing, washing with pure water, closing with nickel salt, cleaning and spraying, washing with pure water, drying in vacuum. The technique changes oxidating film hole by using increase of oxidating temperature and electrolyte concentration for enhancing the film absorption ability to dye; a processing agent before dyeing can avoid poor dyeing effect caused by acid sewage flow in hole, screw hole of the anode oxidating product efficiently, and control poor dyeing effect, white point, color mistiness with flow hanging shape caused by residual medicinal liquor flow in dyeing by increasing dyeing ability of dye; replacement of dyeing agent can greatly increase stability of dyeing and prolong working life of dye, and increase absorption ability of the oxidating film to dye.

Description

technical field [0001] The invention relates to an anodic oxidation process and a dyeing process of an aluminum alloy, in particular to an anodic oxidation dyeing process of an aluminum extruded profile product with many blind holes. Background technique [0002] The aluminum materials used in our company's dyed and anodized Parker series products (206403, 206405, 206636 / 637) are extruded profiles, and there are many product holes and threaded holes, many of which are blind holes. Poor spot-like and star-like dyeing tends to occur in holes and threaded holes. There are many blind holes, and it is difficult to wash the remaining liquid medicine in the holes, and the residual liquid medicine flows out during dyeing, resulting in poor dyeing, white spots, and blurred colors. Simply washing with water after oxidation and directly dyeing the above problems are prone to occur and cannot be recognized by customers. [0003] Dyeing is carried out in the film pores of the aluminum ...

AI Technical Summary

Problems solved by technology

When dyeing in holes and threaded holes, spot-like and star-like dyeing defects are prone to occur

There are many blind holes, and it is difficult to wash the residual liquid in the holes, and the residual liquid flows out during dyeing, resulting in poor dyeing, white spots, and blurred colors, etc.

Simply washing with water after oxidation and directly dyeing the above problems are prone to occur and cannot be recognized by customers

[0003] Dyeing is carried out in the membrane pores of the aluminum anodized membrane. On the one hand, the membrane layer is required to have sufficient porosity; Active, so not all anodic oxidation films can be dyed with suitable colors, the necessary conditions: the anodic oxidation of aluminum in sulfuric acid solution is colorless and porous, if you want to get a film suitable for dyeing, especially suitable for dyeing dark colors Ordinary oxidation process Can not guarantee

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