1.CONICAL DOUBLE-SCREW PLASTIC EXTRUDER. 2. Used in pipes, plates, special shaped materials, etc ... Delivery 15days after recyciving the prepaymentThe conical double-screw plastic extruder has the characters such as force extruding, high quality, ... , good plasticized performance, powder forming directly, etc. This extruder is equipped with self temperature controlling and vacuum exhausting devices ...