Análise comparativa na produção de peças plásticas por injeção em moldes e impressão 3D

Abstract

3D printing is an additive manufacturing method that is becoming affordable with FDM and SLA technologies for polymers. This technology makes it possible to materialize parts with complex geometries with reduced costs in low quantities. Previously, the most widespread production method in complex geometries was plastic injection. However, due to high mold and design prices, the amount needed for injected production must be bulky, to dilute costs. In this work, a comparative study will be carried out between the productive costs of the piece of polymer lego block, ABS, printed in 3D with FDM and SLA technologies and compared with the project and mold budget of a company specialized in the sector, in the state of Paraná. The results found show that the production via injection becomes viable, considering the costs, in large scales of production. In relation to production via FDM, it is necessary to produce 781,000 pieces to balance the costs of both methods, from that quantity onwards, production via injection is the most suitable. For SLA technology, this value is 16 thousand pieces. However, FDM and SLA technology become unfeasible in relation to the time required for each large-scale production.