METHOD FOR LAYER-BY-LAYER PRINTING OF SINGLE-COLOR AND MULTI-COLOR ARTICLES Russian patent published in 2019 - IPC B41F17/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to technology and equipment for making single-color and multi-color articles by digital model of article by layer-by-layer printing of molten polymer threads (FDM) and can be used in various fields of human activity. Method of layer-by-layer printing of single-color and multi-color articles includes preliminary stage of preparation of graphic model of single-color and multi-color articles and the stage of printing articles on 3D printer, by means of a printing head with a nozzle, into which a construction material is supplied in form of polymer threads of selected colors, heated, mixed and supplied to the surface to be printed by the nozzle. Printing head is used, consisting of housing with channels for supply of polymer threads, mixing system comprising annular chamber and located in it with possibility of rotation mixing unit, unit for cutting of polymer threads, grate and heater installed on annular chamber. Prior to printing single-color and multi-color articles with additional software, formulations of mixing corresponding amounts of polymer threads of selected colors are made to produce the color required by the product. In the process of printing, the number of polymer threads of selected colors specified in the recipe is fed into the mixing system, simultaneously they are ground with a cutting unit, melted by a heater, mixed and the melt of the polymer threads is fed by the knotting unit into the nozzle.

EFFECT: more efficient and high-quality production of single-color and multi-color articles with large palette of colors, selected set of colors of polymer threads, as well as improved technological capabilities, productivity, artistic expressiveness.

8 cl, 6 dwg