Device and method for the extrusion of thermo-mechanically deformable materials in bulk form, and compact screw extruder

    公开(公告)号:US11597118B2

    公开(公告)日:2023-03-07

    申请号:US16628398

    申请日:2018-06-26

    申请人: AIM3D GMBH

    摘要: Method and device for the extrusion of thermomechanically deformable materials, as well as a compact screw extruder. The configuration of the material infeed in a screw extruder, has a significantly smaller length-diameter ratio than known solutions from the fields of injection moulding and additive manufacturing and a crushing tool, located in the funnel-shaped infeed region of the vertically arranged screw extruder which prevents the rotational movement of the material in the funnel, and also thereby forces movement in the conveying direction of the screw extruder in combination with the gradient of the screw flanks. In addition, a portion of the coarse material is crushed, whereby the bulk material density is increased in the region of the screw and less air must be pressed out of the material in the region of the plasticization and homogenization zone.

    Single-screw extruder with hollow rotor member

    公开(公告)号:US11548198B2

    公开(公告)日:2023-01-10

    申请号:US16328022

    申请日:2017-08-25

    摘要: A single-screw extruder (100), and a method. The extruder (100) comprises—a cylindrical rotor member (1) having diameter (D) and length (L) and comprising a feeding zone (14), —the rotor member (1) arranged in a barrel (2), —the cylindrical surface of the rotor member (1) carrying cavity/cavities and/or projection(s) (5) arranged in helically extending rows, —the helically extending row(s) of the rotor member (1) having a pitch (P) and depth (d) in the feeding zone (14) of the rotor member, and the extruder (100) further compris-ing—a drive system (4) for the rotation of the rotor member (1) in the barrel (2). The relation of the depth (d) to the diame-ter (D) of the rotor member, i.e. d:D, is not more than 1:20, and the relation of the pitch (P) of the rotor member to the di-ameter (D) of the rotor member, i.e. P:D, is not more than 1:4.