The present utility model relates to a special PETG screw for an extrusion blow molding machine, comprising a keyway-equipped connecting piece and a screw body. The screw body is designed in sections, including an initial section, a full melting section, and a discharge section connected in sequence. The initial section is connected to the keyway-equipped connecting piece, and the top of the discharge section is provided with a conical head. The initial section is provided with threads of uniform pitch, the full melting section is provided with double threads of one long pitch and one short pitch, and the discharge section is provided with threads of the same uniform pitch as the initial section, with a mixing head at the middle position. The present utility model independently designs the screw in the plasticizing barrel of a traditional extrusion blow molding machine, resulting in better smoothness and more uniform wall thickness of PETG products.
Country Code: CN
Application Number: CN201520038450.X
