Sand mould/core hardening - partic the uniform hardening of foundry moulds or cores using compressed air and an accu

摘要

Sand moulds and cores are hardened for foundry purposes by a gaseous catalyst/compressed air mixture fed in through separate feed lines contg. one remote-controlled valve each. The valve driving members are linked to a time control mechanism that can be separately adjusted both for timing as well as for the phasing of both valves.