Method for manufacturing a mold core

摘要

An exemplary method for manufacturing a mold core includes steps of: providing a mold core preform having a molding surface; ultrasonically cleaning the molding surface of the mold core preform; cleansing the molding surface of the mold core preform using plasma; forming a silicon carbide film on the molding surface of the mold core perform using a sputtering process; and forming a diamond-like carbon film on the silicon carbide film using a sputtering process. The mold core made by the method has excellent hardness, compressive strength, and easy separability, low manufacturing and replacement cost.