Apparatus and method for blow moulding a container using a vibrating knife assembly to cut the extruded parison

摘要

An apparatus and method for molding and optionally filling a container including an extruder head (14) for extruding a length of parison (12) and a vibrating knife (26) operatively associated with the apparatus for reciprocating movement (48) and having a blade (80) positioned below the extruder head (14) which traverses the path of the extruded parison (12) to sever the parison (13). Preferably, the vibrating knife (26) vibrates the blade (80) at ultrasonic frequencies. <IMAGE>