FDM方式3Dプリンタによる造形物の積層界面強度の改善

抄録

In recent years, with the remarkable improvement in the performance of 3D printers,3D printers have come into use not only for manufacturing prototypes and JIGs but also for mass-produced products. There are, however, a lot of problems to be solved in price, speed and accuracy, and many other aspects. On the other hand, having considered the advantages of 3D printers, the authors find it necessary to positively examine how to make a better use of them at the present moment without fundamentally changing manufacturing methods. FDM 3D printing among others, is a clean, easy-to-use and office-friendly 3D printing process. However, laminated interfaces which causes a decrease in strength occurs in FDM 3D printing because it laminates part layer-by-layer to produce a modeled object. Therefore, this paper discusses whether or not further strength improvement is possible by improving bonding strength at the laminated interfaces. This paper focuses on the laminated interfaces which cause a decrease in the strength of model manufactured by a FDM type 3D printer. The objective of this paper is to evaluate improvement in the strength and the laminated interface state of model in which the bonding strength between the first layer and the resin of the second layer is strengthened due to homogenization of the structure in semi-molten state by installing a halogen spot heater in a 3D printer, operating the heater in conjunction with the nozzle of the 3D printer while irradiating the interface during modeling, and heating the solid surface of the first layer. From this paper got tensile strength increased by 27%. The arithmetic surface roughness under the optimum condition decreased by 57%. Based on these results, the possibility of improvement of the strength and the interface state with a halogen spot heater is proved.