The present utility model discloses a screw assembly and a barrel-screw assembly for a twin-screw extruder, belonging to the technical field of plastic processing equipment. The screw assembly comprises two screws with identical structures and meshed with each other. Each screw comprises a conveying section, a melting and plasticizing section, a mixing section and a metering section connected in sequence. The metering section comprises 3–5 first forward screw blocks and 3–5 second forward screw blocks connected in series. The lead of the first forward screw blocks is 40–50 mm and the length is 40–50 mm. The lead of the second forward screw blocks is 30–38 mm and the length is 30–38 mm. The screw assembly of the present utility model enables quantitative, continuous and stable feeding into an impregnation die, generates sufficient pressure to impregnate and coat continuous fibers in the impregnation die, stabilizes the melt pressure and conveying, distributes the melt uniformly in the impregnation die, and effectively controls the thickness difference of products.
Country Code: CN
Application Number: CN202323663504.5
