Development on the production of a new type of extruder used in additive manufacturing, FDM technology

In this paper is studied the possibility of executing a new type of extruder used in 3D FDM technology printers. By using this new extruder, it is intended to considerably lower manufacturing costs compared to 3D printers using the raw ABS or PLA thread. The raw material used for the printers made with the new extruder will be ABS, PLA or other materials later developed. As a result, the training of the material needed for 3D printing will be done by means of a casting screw made in the form of a conveyor screw developed using the 3D printer. The design of the 3D model of the screw required for the extruder is done in AutoCAD by moving a cone trunk whose dimensions are variable after a conical worm wound on a cone whose axis of symmetry coincides with the axis of symmetry of the worm. The axis of symmetry of the cone torso will be perpendicular to the axis of the cylinder from which the worm will result. For calculating the points needed to define the axis of the trunk cone, vector calculation elements will be used. The program used for the point calculation belonging to the propeller is Auto-Lisp and the representations are made in AutoCAD. Once the transport worm is represented in AutoCAD, it will be imported into Inventor, where the final shape of the snail will be modeled, and it will be exported in format ".stl" and printed on the 3D printer, after which a casting mold will be executed and then poured. (C) 2018 The Authors. Published by Elsevier B.V.