Hot runner systems have traditionally used either pneumatic or hydraulic actuation to open and close valve gates.

While both technologies are useful for specific applications, the new electrically-actuated valve stems promise more control, cleaner actuation, closer pitch spacing, higher quality gates and reduced maintenance.

Over the past several years, electrical servo motor technology has become more affordable. An electrically-actuated valve gate system combines the strength of both pneumatic and hydraulic hot runner technologies, using an electrical servo motor to open and close valve stems with precision. An electrical synchronized valve gate actuation system satisfies a growing demand to electrify the entire molding cell and provides unique solutions for the molding of medical and other high performance applications.

An electrically actuated system offers molders a diverse set of benefits. The electrical servo motor provides increased consistency, opening and closing valve stems at exactly the same time with precision. In combination with plate actuation, electric systems offer close pitch (as low as 18 mm/0.7 in) direct gating capabilities. Having an integrated temperature controller also makes performance easy to document. Driving both the electrical servo motor and hot runner heaters, setup is easily done from just one interface.