| 摘要 |
PROBLEM TO BE SOLVED: To provide an extruder screw having no disperse mixing unevenness by uniformly-dispersing and mixing a material with small amount of an additive such as a pigment, a filler or the like. SOLUTION: The extruder screw comprises a supply area A made of a feed screw of a deep groove for sequentially conveying a resin material from a main part to a leading end, a compressing area B for compressing the resin material fed from the area A by sequentially reducing a volume of a screw groove, and a metering area C of a shallow groove having one or a plurality of mixing elements for kneading and melting the resin material. In this case, a cutout groove of a predetermined angle to an axial direction is provided at the feed screw having a twisting angle in one or a plurality of reversely feeding directions. |
