Property analysis of multi-material specimen based on ME type 3D printer

The necessity for printing multi-materials has increased as the importance of 3D printing grew in various industries. Many studies have undertaken for printing multi-materials simultaneously. In ME (Material Extrusion) type 3D printers, the method of printing different materials using multi nozzles is generally commercialized. Polymers with different composition are hard-to-mix with each other, making it difficult to maintain the structural strength of printer parts. So the MJ type 3D printer uses a unique method that mixes multi-materials in a liquid state before printing. In the ME type 3D printer, there were also efforts to mix materials in a melted state, but they were mainly demonstrated for multi-colored parts. In this study, the effect of multi-material mixing on structural strength changes was tested. Multi-Materials were printed with the ME type 3D printer by using one nozzle with a multiple filament feeding system. The bending and tensile tests were conducted to verify the structural characteristics.