Development of a new injection molding technology: Momentary Mold Surface Heating process

he Momentary Mold Surface Heating (MmSH) process is an invention that heats the mold surface over 400°C in a few seconds with a gas flame, and then the surface is cooled down very quickly. A shiny surface with 98% light reflection was obtained using the MmSH process for an injection molded part consisting of 30% glass fiber reinforced polycarbonate. Additional equipment to supply the gas fuel and air as well as the specially designed MmSH mold is the only difference compared to the conventional injection molding system. The details of this new injection molding approach using the MmSH process are reviewed in this paper.