TWIN SCREW EXTRUDER

摘要

According to the present invention, a first screw (11) and a second screw (12) have a small diameter section (17a) smaller than the diameter of a flight peak (11a, 12a) at the same position in the axial direction. The present invention is provided with a first screw support section (15a) that has a first support surface (25a) and a second support surface (25b) for rotatably supporting the small diameter sections (17a) of the first screw (11) and the second screw (12), and a flow path (25c) through which passes a resin material conveyed by the first screw (11) and the second screw (12). Regarding the radial direction of the first screw (11) and the second screw (12), a gap (Delta) between the small diameter sections (17a) and the first support surface (25a) and second support surface (25b) is not greater than the size of the gap between the flight peaks (11a, 12a) and the inner surface of a cylinder (13).