Estudo de reaproveitamento de resinas descartadas em uma célula de manufatura composta por impressoras 3D de tecnologia DLP

Abstract

3D printing has been widely used in various sectors of industry since 1980, and in the field of orthodontics, it is used in one of the first manufacturing processes for orthodontic aligners popularly called “invisible”. The DLP (Digital Light Processing) technology of 3D printers uses photosensitive resin to print the desired items and this resin has a high market value, which aroused the interest in this study. The study aimed to evaluate the feasibility of reusing recycled resin in a 3D printer manufacturing cell. Reuse has impacts on reducing costs that provide greater competitiveness in the market, in addition to being a sustainable practice that is being increasingly sought after. Analyzes of the properties of virgin resin and recycled resin, mechanical tests and dimensional analysis of specimens printed in 3D with these resins were performed and compared. It was concluded that the reuse of recycled resin is technically and economically feasible, as the comparison of the results of the analyzes and tests carried out with both resins consolidated in a similar way and within the tolerance limits specified by the company. Finally, the financial savings analyzed between November 2021 and February 2022, with the reuse of discarded resins, would be approximately R$87,040.00 per month.