INDUSTRIAL 3D PRINTER FOR HIGH TEMPERATURE PRINTING Russian patent published in 2022 - IPC B29C64/20 B29C64/10 B33Y10/00 B33Y30/00 

FIELD: additive technology.

SUBSTANCE: invention relates to machine tool building in the field of additive technologies, in particular, to additive manufacturing of three-dimensional physical parts based on a digital 3D model by fused deposition modelling with a molten polymer filament (FDM), namely, to an improved design of a 3D printer. The 3D printer includes: an active working chamber isolated from the kinematics compartment and the environment by woven corrugated protective cover made of fibreglass with high-temperature silicone impregnating agent, and the lower plate of the working chamber is isolated from the inner part with ceramic wool heat insulation; a printing head with two extruders with an automatic system for measuring the height difference of the extruder dies, made without threaded connections in the attachment of the die to the heating unit, using built-in retractable feelers relative to the Z axis; a working platform made of four structural profiles and a ball-screw transmission and isolated from the inner part of the working chamber with ceramic wool, and provided with channels forming a mesh for two circuits located on the working platform, for securing the adhesive film placed on part or all of the working platform, by a vacuum method; an electronics compartment made as a separate unit and installed on the frame of structural profiles, placed wherein using metal profiles on the mounting panels are the main power supply and protective equipment, the 3D printer system control electronics is arranged on distanced nylon racks, the power supply units are placed on the opposite side of the mounting panel, and the inter-unit switching is hidden considering the tracing of the hot areas of the 3D printer; two compartments secured in the frame of structural profiles on both sides from the supports of the lower plate of the working chamber for drying the materials for each of the two extruders with material supply mechanisms; movable transport rollers placed on the lower part of the body of the 3D printer, with a locking function.

EFFECT: development of a 3D printer with a fully isolated working chamber from transmitting heating to the structure and electronic components of said 3D printer, wherein the kinematics of the Z axis ensures high quality of the printed parts, and the structure minimises heat transmission to the linear carriages, increasing the service life thereof, as well as increase in the duration of intervals between repairs and reduction in the cost of replaced parts.

7 cl, 9 dwg