Performance of digital patternless freeze-casting sand mould

Abstract

D igital patternless freeze-casting forming technology provides a green and rapid manufacturing method for single-piece and small-batch casting parts production in the fields of national defense industry, aerospace, power machinery, etc. [1]. The traditional sand mould casting process produces a large number of volatile organic compounds (VOC) and hazardous air pollutants (HAP) that are harmful to the human body and the environment. Of the 188 HAP listed by the U.S. environmental protection agency, more than 40 kinds have been detected in the sand mould casting process, including formaldehyde, benzene and phenol, etc. [2]. Therefore, it is urgent to develop new green casting processes and technologies.