Preparation method of foamed aluminum special-shaped part

A preparation method of a foamed aluminum special-shaped part, comprising the following steps:

• S1, pressing wax molds, by designing and manufacturing a profiling mold according to the requirements of the foamed aluminum special-shaped part, pressing a fusible material into the wax molds by using the profiling mold, and welding the multiple wax molds on a wax casting system to form a wax mould;
• S2, making a shell, by soaking the wax mould into a coating prepared from sodium silicate and quartz powder, taking out the wax mould, scattering quartz sand to the wax mould, hardening the wax mould in a hardening agent, repeating the steps for multiple times until a hardened shell with a certain thickness is formed on a surface of the wax mould, heating the wax mould with the hardened shell in hot water at 80-90° C., enabling the wax mould to flow out from a sprue after being molten to form a casting cavity so as to obtain the shell, drying and roasting the shell, carrying out sand filling around the shell, carrying out preheating, and waiting for casting;
• S3, carrying out smelting, by carrying out melting, refining, component adjustment, refining and modifying, slag and hydrogen measurement, and standing for heat preservation, adding a tackifier, stirring, adding a foaming agent, and stirring;
• S4, carrying out casting, by casting a metal melt to be foamed into the preheated shell, carrying out heat preservation, carrying out sufficient foaming, and then taking out and cooling the shell;
• and
• S5, vibrating the shell, by vibrating the shell by adopting a shell vibrating machine, wherein a shell vibrating portion is positioned at a sprue cup.