In-situ light curing extrusion nozzle

Abstract

The invention discloses an in-situ light curing extrusion nozzle. The in-situ light curing extrusion nozzle comprises a shell, a liquid chamber, a transparent/semitransparent slim tube, a light source and a light shading plate, wherein the liquid chamber, the transparent/semitransparent slim tube, the light source and the light shading plate are arranged in the shell. The transparent/semitransparent slim tube communicates with the liquid chamber. The light source perpendicularly irradiates on the transparent/semitransparent slim tube, and is arranged in the circumferential direction of the transparent/semitransparent slim tube and used for perpendicularly irradiating on the transparent/semitransparent slim tube. The light shading plate is arranged between the light source and the liquid chamber. When the in-situ light curing extrusion nozzle works, the liquid chamber is internally provided with a liquid light curing material, and the liquid light curing material passes the transparent/semitransparent slim tube and is cured to form a solid filament to be extruded after being irradiated by ultraviolet light emitted from the light source. In-situ light curing refers to that light curing reaction is conducted in the nozzle, thus, the liquid light curing material can be input, and the solid filament can be directly printed out. The size range of the printed filament is greatly expanded through the transparent/semitransparent slim tube with the set size, and the size precision of the extruded filament is ensured.

Description

technical field [0001] The invention belongs to the fields of photocuring 3D printing and 3D bioprinting, and in particular relates to an in-situ photocuring extrusion nozzle. Background technique [0002] The raw materials of traditional extrusion 3D printing are solid filaments, which are extruded after being heated and melted by the nozzle, so it is difficult to extrude with a solution as a material. In the field of bioprinting, hydrogel materials are widely used. In order to solve the problem that photocurable hydrogel is difficult to complete extrusion molding due to low viscosity, the existing photocurable printing mainly adopts the following solutions: First, increase the viscosity of the material before printing through pre-crosslinking to adapt to extrusion printing . However, the pre-crosslinking process of this method is difficult to control, and the degree of crosslinking is uneven. Second, extrude and print after mixing the light-curable material with the hig...

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Problems solved by technology

However, this method needs to be illuminated quickly after printing,

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