Breadcrumb Home Machine Tool Technology MTT 113 MTT 113: INJECTION MOLD DESIGN LAB Download as PDF Class Program Machine Tool Technology Credits 3 Students demonstrate proper and safe techniques to build components of an injection mold such as sprue bushings, runner systems, gates, vents, cavities, inserts and ejection systems. Prerequisite Courses MTT 162: PRECISION GRINDING MTT 163: PRECISION GRINDING LAB Corequisite Courses MTT 112: INJECTION MOLD DESIGN