Eliminating surface blemishes on a cosmetic part (part 2)

摘要

Black specks, streaks or color mixing errors are the most commonly recurring problems that mar the surface of highly cosmetic injection molded parts. Three likely culprits causing the surface issues are resin degradation, equipment contamination and/or process miscues. This is a big topic, so I'm breaking it up into parts. Last issue, I discussed resin degradation; this time around, I'm focusing on equipment contamination.