Improving The Strength of The PLA 3D Printing Using Response Surface Methodology

Abstract

Added manufacturing is a breakthrough in the world of manufacturing, one of which is 3d printing technology. This technology makes it easy for us to make customized goods that are cheap, fast, and efficient (do not produce scrap/chips). However, the reliability of 3D printed products is still often in doubt, the weakness of 3D printed products is their strength. In this paper, we experimented with  variables infill density, extruder temperature and infill pattern that affect strength in the 3D printing process. The higher the infill value makes the product stronger, but it requires more material and processing time, besides that the mass of the product will be heavier. While the pattern is related to the internal structure of the product with a certain shape. Test the strength of the PLA 3D printing products with a combination of these three variables using impact charpy, and analysis using the Response surface methodology (RSM) including optimization procedures to obtain the most optimum parameter depending on the product required. The maximum impact reach 164.18 KJ/m-sq, when infill density is 100%, extruder temperature is 220 C-deg and using Cubic infill pattern. This information will be very helpful for developing products with 3D Printer-based processes with PLA materials.