Heston Automatic Screen Changers

The unique design of Heston Automatic Screen Changers for thermoplastic extruders minimizes residence time and possible plastic degradation. Heston Changers mount directly on the threaded end of the extruder barrel and attach directly to die connectors, eliminating the need for a separate stand for the screen changer.

The screen changer uses a push foot to ram a separate removable strainer plate into active position, displacing the used strainer plate, which falls into a "catcher" to await removal and cleaning. Removal is easy and a safety notch on each plate allows it to be inserted only with the screens on the upstream side.