Causes and treatment of aluminum profile processing and dyeing:
1. The thickness of the anodized film is insufficient. The solution is to check whether the anodizing process is standardized, to see whether the temperature, voltage, conductivity and other factors are stable, if there is an abnormality, please adjust the specification accordingly, if there is no abnormality, the oxidation time can be appropriately extended to ensure that the film thickness is up to standard.
2. If the pH value of the dye solution is too high, at this time, the PH value can be adjusted to the standard value with glacial acetic acid.
3. After oxidation, the workpiece is placed in the sink for too long. Timely dyeing is advocated, and if this has already occurred, the workpiece can be properly activated in an anodizing tank or nitric acid neutralization tank before dyeing, and the effect will be very good.
4. Improper selection of dyes. Appropriate dyes need to be used.
5. The dye has been decomposed or mildewed, and the dye needs to be replaced at this time.
6. The oxidation temperature is too low, resulting in a dense film. The oxidation temperature can be increased appropriately.
7. Poor electrical conductivity. Poor contact of the copper rod or cathode lead plate may indicate poor conductivity of the batch. Pay attention to clean the anode copper rod and cathode lead plate to ensure good conductivity.
Because the mold of the radiator profile is a lot of slender teeth, to withstand a large extrusion force, each tooth must have high strength and toughness, if the performance between each other is very different, it is easy to make those teeth with poor strength or toughness break. Therefore, the quality of the mold steel must be reliable, and it is best to use materials produced by manufacturers with reliable quality. The heat treatment of the mold is very important, and it is necessary to use vacuum heating and quenching, and it is best to use high-pressure pure nitrogen quenching to ensure that the performance of all parts of the mold after quenching is uniform. After quenching, three tempering times should be taken to ensure that the hardness of the mold is guaranteed to have sufficient toughness under the premise of HRC48~52. This is an important condition to prevent mold breakage.
