Abstract
Contrary to other polymer processing methods, additive manufacturing processes do not require any pressure during the consolidation of layers. This study investigates the effect of high ambient pressure on the consolidation of layers during the FDM process and their analysis of mechanical properties. An experimental setup was arranged, consisting of a 3D printer integrated into a customized Autoclave, to achieve high strength properties for 3D printed parts as like injection-molded specimens. The autoclave can maintain 135 bar of pressure and a maximum temperature of 185 °C. 3D printing with PLA was carried out at 0 bar, 5 bar, and 10 bar. Tensile, flexural, and Charpy tests were conducted on printed specimens, and the effect of pressure and temperature on 3D-printed samples were analyzed. It could be shown that autoclave preheating before printing and autoclave pressure during printing improves the consolidation of layers immensely. The pressure inside the autoclave provokes a more intimate contact between the layer surfaces and results in higher mechanical properties such as yield strength, Young’s modulus, and impact strength. The properties could be raised 100%.
Highlights
Additive Manufacturing (AM) is the most emerging plastic process that promises a single processing step to fabricate complex and multifunctional parts/products usingCAD model [1]
By considering results from previous research, this study aims to achieve high strength properties like the conventional method in 3D printing
This research aims to 3D print specimens in a customized autoclave under the ambient pressure and elevated temperature conditions and to measure the improvement of mechanical properties such as yield strength, yield strain, Young’s modulus, flexural and impact strength
Summary
Additive Manufacturing (AM) is the most emerging plastic process that promises a single processing step to fabricate complex and multifunctional parts/products using. It is defined as a “Process of joining of material such as polymer, metal, concrete, ceramics, or rubber in the form of successive layers on top of each other” [2]. Known as 3D printing or rapid prototyping, has existed for many years. In 1984, the very first 3D printing technology was developed by Charles W. Extensive research was done, and tremendous advancements were created. This led to the development of many other
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