Gas-assisted Powder Injection Molding: Mold-Cavity Effects On Residual Wall Thickness

摘要

The effects of processing variables on gas penetration depth and residual wall thickness (RWT) of gas-assisted injection molding (GAIM) were investigated for polypropylene (PP) and 316 stainless steel (SUS316L) based on Taguchi method. The processing variables were melt temperature, shot size, gas pressure, and gas delay time. For PP, there were no significant differences in gas penetration depth between mold materials for all processing variables. For SUS316L, the significance of gas delay time was higher in an aluminum (Al) mold insert than the stereolithography (SLA) mold insert for gas penetration depth. The most significant parameter affecting RWT was melt temperature for PP and gas delay time for SUS316L, respectively.