extruder assembly, extrusion / injection unit of an in-line molding machine and wiper

摘要

EXTRUDER SET, EXTRUSION / INJECTION UNIT OF AN IN-LINE MOLDING MACHINE AND CLEANER. The present invention provides an improved extruder assembly that includes a wiper for cleaning a screw portion in a low pressure extruder stage whereby cleaning the screw portion improves casting transport through the low pressure extruder stage. The present invention has particular utility when used in a low pressure capture and vent extruder stage of a single screw composition extruder. The present invention additionally provides an extrusion / injection unit for use in the in-line composition molding system incorporating the improved extruder assembly.