Medical and electronics industry injection molders can attain a higher degree of process reliability for high-precision valve-gate applications via an electric-drive valve-gate system that's now available with an optional position encoder.
Manufacturer Ewikon says the encoders provide real-time monitoring of valve pin position with an accuracy of 0.01 mm. Also new for the system is a second-generation touch-screen electric drive controller, which monitors the valve-pin position and corrects for any deviation. For instance, the controller will trigger an error message and alarm if the drive fails to reach its position, allowing it to detect gate blockages caused by resin contaminants. The controller shows the current valve pin positions graphically and digitally and allows operators to select for synchronous or sequential control on all drives.