3D printing device and 3D printing method by utilizing supercritical carbon dioxide as solvent

Abstract

The invention discloses a 3D printing device and a 3D printing method by utilizing supercritical carbon dioxide as a solvent. The device mainly comprises a stock unit, an ejection unit, a three-dimensional molding platform unit and a raw material recycling unit, wherein the ejection unit comprises a gas pump, a needle valve, a cooling fan and a resistive heater; the stock unit comprises high polymer material powder, a powder pump, a carbon dioxide gas cylinder, a mixing tank, a liquefied booster pump, a heater, a liquid pump and a gas pump; the three-dimensional molding platform unit comprises an aluminum alloy molding platform and a three-dimensional ball screw sliding table module; and the raw material recycling unit comprises a closed box and a recovered gas pump. According to the method disclosed by the invention, the carbon dioxide gas is turned to be in a supercritical carbon dioxide state, and after the carbon dioxide gas is completely dissolved to produce supercritical carbon dioxide solution containing a high polymer material, the solution is conveyed into the ejection unit by virtue of the liquid pump. The supercritical carbon dioxide serves as a consumable carrier, so that more kinds of high polymer materials are applied to the field of 3D printing, and the overall performances of 3D printing supplies are improved.

Description

technical field [0001] The invention relates to a mechanism in a rapid prototyping device, in particular to a 3D printing device using supercritical carbon dioxide as a consumable material carrier. Background technique [0002] Rapid prototyping technology (also known as rapid prototyping manufacturing technology, Rapid Prototyping Manufacturing, referred to as RPM), also known as 3D printing. According to the three-dimensional model data of the object, the technology manufactures the entity in a layer-by-layer manner through the forming equipment, which can overcome the special structural obstacles that cannot be realized by traditional mechanical processing. Simplified production of arbitrary complex structural components can be realized. The existing 3D printing technologies are mainly divided into fused deposition modeling (FDM), selective laser sintering (SLS), stereolithography (SLA) and digital light processing (DLP). [0003] Fused deposition modeling (FDM) works b...

AI Technical Summary

Problems solved by technology

The existing types of these materials are not enough to meet the actual industrial requirements. Many types of polymer materials are not suitable for 3D printers with FDM technology, or cannot be made into filament-like consumables due to material performance. Therefore, for 3D printing technology new materials Development and preparation are crucial

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