This paper proposes to adopt impregnating technology to deal with the partial leakage of high-pressured thin-wall aluminium alloy castings.After discussing the principle of impregnating technology and by using stickness theory for analyzing the features of product defects

this paper has proved the adaptability and reliability of the impregnating technology in practical application.By designing a special impregnating tank

this paper has found out the proper impregnating technology for solving leakage problem of large thin-wall aluminium alloy casings.