Desarrollo de sistema de extrusión de filamento a partir de botellas plásticas para el uso en impresión 3D

Abstract

In 3D printing, the generation of high quality flaments remains a low cost and low environmental impact need. The study focused on designing, developing and validating a filament extrusion system for 3D printing from PET plastic bottles. In the design stage, the structure and elements that make up the system were defined and each of the parts were modeled in a CAD program. The extrusion system uses non- electronic and electronic components, a cutting, heating and cooling, winding and storage system. After adjusting parameters such as the temperature in the hot block and of the bearings that cut the plastic from the bottles into longitudinal strips, a 1.75mm filament was obtained according to the standard for 3D printing. In the tensile tests performed, the recycled PET obtained 25 % less elasticity and 13% higher deformation compared to PETG specimens, which is within the admitted parameters, thus demonstrating the feasibility of the system.