... 4.easy operation 5.environmental pollution Introduction This production line, to self-hardening sand as material, use of molding machine making ... of natural silica sand, resin and hardener. The whole line compose of sand reclamation system and molding system. Sand ... h,10t/h, 15t/h, 20t/h, 25t/h, 40t/h, 60t/h, 80t/h resin sand production sand, 10t/h, 15t/h, 20t/h, 25t/h, 40t/h, 60t/h, 80t/h, 100t/h ...