METHOD FOR TREATING RECOVERED SAND AND REPLENISHING SAND FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To form recovered sand to prescribed green sand for shaping casting molds simply by subjecting the recovered sand to kneading treatment for a relatively short time.;SOLUTION: The bentonite coated sand formed by previously coating reconditioned sand and/or fresh sand with bentonite is fed as replenishing sand before the recovered sand is subjected to the kneading treatment.;COPYRIGHT: (C)2001,JPO