... Product descriptionSJ series conical twin screw plastic extruderplastic extruder/extruding machine/pressplastic extrusion plant/equipment/machinery1, Application ... : SJSZ series of conical twin-screw extruder, with the suitable screw and auxiliary machinery, ... with overload production and malfunction alarmthe oil of screw core homoeothermicthe oil of barrel is cooling, and install ...