Annealing Oven

After that the aluminum slugs form raw stock through the cold extrusion process, the metal molecules will generate stress due the structural changes, thus the aluminum slugs lose their flexibility. In order to eliminate this stress and ensure the tube body remains applicable to usage requirements, we carry out several stress relief annealing processes on the tube shell. After the annealing process. The raw stock guarantees the adhesion of the inner and bottom coatings.