Shiny solid surface structural foam injection-molded parts with rapid mold temperature control by MmSH PROCESS (momentary mold surface heating and cooling process)

摘要

MmSH(Momentary Mold Surface Heating) process is an invention that heats only the mold surface over 400 °C in a few seconds with gas flame and cool it down very quickly again[1,2]. Practically it was tried to produce a shiny surface of 98% light reflecting of notebook PC housing of 20% expanded structural foam with PC/ABS alloy. In addition to the outstanding surface quality, physical properties such as falling dart impact strength and heat resistance were improved. And it was carried out successfully with simple attached equipment and specially designed MmSH Mold which is to supply the gas fuel and air between the two parts of mold. The results of injection-molded notebook PC housing with MmSH Process will be discussed in this paper.