| AVS 62nd International Symposium & Exhibition | |
| Additive Manufacturing/3D Printing Focus Topic | Thursday Sessions |
| Session AM-ThP |
| Session: | Additive Manufacturing/3D Printing Poster Session |
| Presenter: | Hiroaki Sakaguchi, Aichi Institute of Technology, Japan |
| Authors: | H. Sakaguchi, Aichi Institute of Technology, Japan A. Matsumuro, Aichi Institute of Technology, Japan K. Takeda, Aichi Institute of Technology, Japan |
| Correspondent: | Click to Email |
3D printing technique is strongly leading the next industrial revolution in all over fields. The manufacturing methods are used by additive processes using successive layers of a lot of kind of materials. In the past few years, the rapid development of 3D technologies has changed from data visualization models and so on to the manufacturing of industrial production including mass-production (DDM). Many difficult problems should be overcome in order to establish DDM technology as the general industrial products manufacture method. One of the representative problems is the durability or strength of the products. 3D printing systems deposits melt or soften materials in a layer state on solid parts. Layered structures are formed in the whole products, and extreme low strength interfaces are fabricated at the same time. It is necessary to optimize a printing direction according to the load that determines the strength and durability of the product as one of manufacturing process.
Our study investigated an optimal molding direction procedure with respect to mechanical properties. Tensile and three points bending tests were done for standard plate type specimen made of polymer (ABS-like, Strasys Co., Ltd) using Ink-Jet-Type 3D printer (Connex500). We made three types of specimens, which were varied in the printing direction, respectively. These experiments mean that the effect of directions of layers entering in the molds on important mechanical properties. Three type specimens for tensile direction were molded as follows: (S1) plane molding with printing layers parallel to tensile direction, (S2) plane molding with vertical layers to tensile direction and, (S3) vertical molding with vertical layers to tensile direction. Experimental results of tensile strength, Young's modulus and rupture stress of each specimen showed remarkable differences. The detail results were as follows: tensile strength of (S1) 50 MPa, (S2) 39 MPa, (S3) 35 MPa, Young's modulus of (S1) 1.1 GPa, (S2) 0.8 GPa, (S3) 0.7 GPa and rupture stress of (S1) 59 MPa, (S2) 46 MPa, (S3) 37 MPa. Bending test results showed the similar tendency of those of Young's modulus. These results became clear strongly significant specific anisotropy of mechanical properties related to printing directions. Therefore, establishment of DDM needs the logical molding process and construction of the database of mechanical properties of individual materials. Furthermore, another important problem concerning DDM must be development of new materials with strength enough for practical use. Now we have studied new nanocomposite materials with innovative high strength. We will present the results at the conference.