This invention also discloses a variable-pitch twin-screw extruder, whose extrusion barrel is composed of multiple barrel sections fixedly connected together. Water channels are provided at both ends of each barrel section, and water inlet and return channels are also provided on the barrel body of each section; cooling and heating elements are alternately arranged on the outer wall of the barrel sections; the feeding end of the extrusion screw is rotatably supported by a screw water guide, to which two water guide bolts are connected, with the two water guide bolts leading to the screw water cavity and the water supply pipe, respectively; the extrusion pitch Tn, the crest width Bn, and the screw lateral clearance Cn of the extrusion screw continuously decrease from the feeding end to the discharge end. The variable-pitch twin-screw extruder of this invention features uniform plasticization of the material, good dispersion, and effective control of the working temperature of the screw extruder, making it particularly suitable for twin-screw extrusion of solar cell encapsulation films.
Country Code: CN
Application Number: CN202311487885.8
