Novel Injection Unit With In-Line Screw/Plunger

摘要

Longstanding limitations of conventional reciprocating-screw injection molding machines are addressed by the new Inject-EX system from Md Plastics, Columbiana, Ohio. This injection unit, appearing for the first time at NPE2018 next month, can be supplied with hydraulic, hybrid, or all-electric drive. The all-electric version consists of a servo-driven screw connected in line with a plunger. The screw and plunger thereby move together as the entire injection unit reciprocates, driven by two servo motors and ballscrews mounted on either side of the unit.