An injection molding process creates a micro-cleanroom environment inside a mold cavity which can stay closed to airborne contaminants while ejecting and transferring the molded part out. The molded part is formed and solidified at a parting-line plane within the mold cavity, then is carried rearward...http://www.google.co.uk/patents/US4981634?utm_source=gb-gplus-sharePatent US4981634 - Injection molding process operating without opening the mold to airborne contaminants
