Multi-port pneumatic pellets 3D printing nozzle device

Abstract

The invention discloses a multi-port pneumatic pellets 3D printing nozzle device. The device comprises a driving part, a nozzle body composed of a plurality of feeding channels, a discharging channel,a pellet storage chamber, a heating chamber and a nozzle, a heating part fixed on the outer wall of the heating chamber, a screw, and a pellet leakage net located in the pellet storage chamber. The pellet storage chamber and the heating chamber are integrally formed. Pellets are driven into the pellet storage chamber through a pneumatic feeding device and the feeding channels. The driving part drives the screw to rotate so as to make the pellet leakage net synchronously rotate to screen the pellets; and the pellets are pushed by the screw to enter the heating chamber to be dissolved, homogenized and pressurized, and finally are uniformly extruded through the nozzle. The device provided by the invention helps realize the function of direct printing molding of plastic particles, reduce theprocess of melting into filaments and avoid the defects caused by the filamentous materials. In addition, the function of controlling feeding of pellets with different colors is realized by adopting the multi-port pneumatic feeding form, and printing molding of multi-color products can be completed with a single nozzle.

Description

technical field [0001] The invention relates to the technical field of 3D printing nozzles, in particular to a multi-port pneumatic granular material 3D printing nozzle device. Background technique [0002] The FDM (Fused Deposition Modeling) process fused deposition manufacturing process was successfully developed by American scholar Scott Crump in 1988. The material of FDM is generally a thermoplastic material, such as wax, ABS, nylon, etc., and is fed in a filament form. The material is heated and melted in the nozzle. The nozzle moves along the section profile of the part and the filling track, and at the same time extrudes the molten material, and the extruded material solidifies rapidly and coagulates with the surrounding materials. [0003] The FDM technology is applied to the 3D printer nozzle based on thermoplastic materials. The wire used in the 3D printer is a wire-like material. The wire-like material is obtained by melting plastic particles first, then cooling...

AI Technical Summary

Problems solved by technology

When printing, the wire-like material needs to be preheated and melted in the nozzle of the 3D printer before printing. problem, and only by disassembling the nozzle and tray of the 3D printer can problems such as material jam and material blockage be dealt with, the process is more complicated and the efficiency is low

[0004] In addition, to achieve multi-color printing, it is necessary to design multiple nozzles, and there are also problems such as material jamming, material blocking, and scraping when multiple nozzles are working, which affects product quality.

Images