A three-layer co-extrusion device for a blow molding machine comprises a die head with a die nozzle and three annular slit runners inside, as well as two extruders. The die nozzle is provided with two central distribution holes. The extrusion port of the first extruder is connected to the inlet of the first central distribution hole, whose outlets are respectively connected to the first and third annular slit runners. The extrusion port of the second extruder is connected to the inlet of the second central distribution hole, whose outlet is connected to the second annular slit runner. The outlets are connected via corresponding connecting runners. The utility model has the advantages of simple structure, low energy consumption, low production cost and high production efficiency.
Country Code: CN
Application Number: CN200520056429.9
