1999 Fiscal Year Final Research Report Summary
Research on Rapid Prototyping Using Functional Materials
| Project/Area Number |
10650136
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
設計工学・機械要素・トライボロジー
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
MURAKAMI Tamotsu The University of Tokyo, Graduate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (20212251)
|
|---|
| Project Period (FY) |
1998 – 1999
|
| Keywords | Rapid Prototyping / Solid Freeform Fabrication / Fused Deposition Modeling / Functional Materials / Multiple Materials / Layered Fabrication / CAD / CAM / Solid Modeling |
|---|
| Research Abstract |
Technologies to fabricate solid objects of various shapes automatically and rapidly from 3-D CAD geometry data are called "rapid prototyping". The purpose of this study is to propose a fundamental technology of rapid prototyping using multiple materials of different properties such as elasticity and electric conductivity so that the resulting solid objects have some functions as well as geometry. The results of this study are summarized as follows :
1. By comparing solid freeform fabrication methods, fused deposition modeling (FDM) was adopted because of its capability of utilizing wide range of materials. After some theoretical calculation and basic experiments, a rapid prototyping system based on FDM using extrusion by screws and cylinders was designed and made. The system has multiple sets of screw and cylinder, each of which contains different materials. The system selects the screw-cylinder during fabrication process so that it can fabricate a solid object consisting of multiple ma
… More
terials.
2. Conventional data formats for rapid prototyping such as STL (STereo-Lithography) are not originally designed to handle multiple materials. This study proposed a new data processing method for multiple material, fabrication by extending' the interpretation of existing STL and VRML (Virtual Reality Modeling Language) format so that the compatibility between current data formats is maintained.
3. When fabricating an object consisting of multiple materials, bonding between two materials at the boundary is not strong enough in some material combination. To strengthen the bonding, path overlapping method for neighboring, two materials in the same layer and path interlace method for two layers of different materials were proposed.
4. The methods mentioned above were implemented as a rapid prototyping system. By fabricating objects consisting of multiple materials such as polypropylene, elastomer and conductive resin, efficacy, possibility and current limitation of this study were examined. Less
|
