printer head for 3d printing

Abstract

The invention relates to a printer head (1) for 3D printing of glass, which printer head includes a heating body (8) made of refractory metal, arranged in the central part of the heating body for passage through the heating body (8) ) a through hole (20) that feeds the glass, a nozzle (5) arranged on the heating body (8), at the outlet of the through hole (20), and a nozzle (5) arranged around the heating body and arranged to run across the induction coil An induction coil that heats the heating body through electromagnetic induction when HF voltage is applied to it. By feeding the glass filament through the through hole of the heating body heated by the induction coil, the glass filament will melt and exit the printer head in molten form as a glass ribbon. The glass ribbon will solidify quickly after being printed onto the printer's bench or placed on top of an already printed layer on the printer's bench.

Description

technical field [0001] The invention relates to a printer head for 3D printing of glass and to a 3D printer comprising such a printer head. Furthermore, the invention relates to a 3D printing method for 3D printing of glass. Background technique [0002] 3D printing or additive manufacturing (AM) refers to any of various processes for printing three-dimensional objects. A primarily additive process is used in which successive layers of material are placed under computer control. These objects can be of almost any shape or geometry and are produced from 3D models or other electronic data sources. Different types of 3D printers have been developed over the years, such as 3D FDM (Fused Deposition Modeling) extrusion printers. 3D FDM extrusion printers are mostly based on melting filaments such as plastic or metal in the printer head. Due to the relatively low melting material used for the printer head, the maximum melting temperature of such 3D printers is limited to around...

AI Technical Summary

Problems solved by technology

[0005] In publication CN103395973, the printhead is covered by a layer of insulating material to conduct most of the energy towards the corundum melting cavity at the center of the printhead, such a configuration is not very energy efficient and would require an unwanted amount of energy to reach the required temperature

Furthermore, the use of refractory ceramics such as corundum will limit the maximum temperature of the print head and thus the printing of glasses with high viscosity such as quartz glass or other glass types

A further problem with using refractory ceramics such as corundum for high temperature 3D glass printing is the limited thermal shock resistance of most available ceramics and chemical attack of the glass causing impurities / bubbles in the molten glass

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