Abstract
Polymer resins are the most used in 3D printing. These resins have a different behavior than wax (used in the lost wax process) and cannot be used with the same conditions. This study aims to define the standardized conditions for obtaining final pieces of jewelry with good finishes, from a casting process combined with 3D technology for prototypes making. The selection and understanding of the various variables and condition of the process are one of the main challenges for the optimization. Different authors consider that the burning stage is the most critical and crucial. For this reason, four burn curves are proposed, in order to evaluate the behavior of two resins (B9-Emerald and Epic 2000) and try to reduce the burning time, without affecting the quality of the piece. Parts with better quality were obtained by applying a curve with three temperature ramps: 150, 455 and 750 °C, maintained for 40, 30 and 20 min, respectively with a total time of 4.5 h.
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