Milacron demonstrates new process for two-shot molding of automotive glazing at NPE

Milacron is teaming with Exatec to demonstrate at NPE a new process for two-shot molding of automotive windows.

The Cincinnati Milacron Maxima MG 1100 two-platen press molds a fixed sidelight of clear polycarbonate overmolded with black polycarbonate bezel. The approach combines Milacron's design for piggyback injection units with an innovative mold from Exatec.

Milacron mounts the secondary injection unit on an injection sled directly above the primary injection unit. The sled is mounted to the stationary platen offering high level of alignment. "Piggybacking" the injection units reduces machine footprint and avoids compromises to the integrity of the stationary platen, points out Ron Hertzer, Director of Technology. "There is no impact whatsoever on the compact size of the press, while we're able to eliminate the need for two holes and any effect on platen stiffness."

The integrated molding system at NPE features a Milacron robot for part take-out. The robot places the part in an inspection box where an imaging sensor measures the bifringence of the part, then places it on a conveyor. The Maxima is equipped for quick-mold change (QMC) with Staubli magnetic mold clamping system and a tie-rod puller.