72 Cav. Pet Preform Line with The Cooling Robot, Two Screw ,Cycle 10s, 23000pcs/h, 4560g, 500T. Demark 72 cavities pet preform line molding system@injection molding machine@) uses a new part cooling and handling system, which features: 1. Cooling on the inner surface of the preform without using compressed air, unlike most post-mold cooling systems which only cool the outer surface 2. Optimized ...