Material: stainless steel 316, 304, 17-4PH

Representative products: impeller

Thickness of fan blade 1.5-2.5mm

Fan blade height 2.5-5mm

Blank tolerance ISO8062-CT5-6

The internal structure of the impeller is generally composed of 7-11 individual blades. In order to achieve a certain flow rate, the blades are designed with a composite shape of rotation plus twist.

In addition, the impeller itself is a two-sided closed structure, which makes it more difficult to mold the internal blades in the production of the impeller. First of all, in the process of making wax type, the whole impeller can not be produced as a whole, and it is necessary for the process designers to make certain divisions according to the structure of the product, and then assembled and molded.

Secondly, in the process of making silica-sol shell, the narrow space of two cover plates of the impeller needs the shell-making agent to enter easily and completely wrap the wax shell, so as to ensure the strength of the cavity in the casting process. Finally, during the casting process, it is also ensured that the end of each fan blade is filled with liquid metal and there is no outgassing. After repeated process design discussions and summarized in the actual casting process. These problems have been solved one by one. At present, we produce impellers with complete and smooth runners and no internal defects after X-ray inspection.