Finite element analysis of open and closed shell core design for injection moldings | |
| Author | Bovornpong Supaporn |
| Call Number | AIT Thesis no.ISE-04-05 |
| Subject(s) | Finite element method Injection molding of metals Shell molding (Founding) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ISE-04-05 |
| Abstract | Selective laser sintering (SLS) is at the forefront of rapid tooling technologies for injection molding applications. A new method developed in Brazil by N. Volpato and T.H. Childs creates injection mold inserts by SLS at 39% of the usual time to build the part. The method involves sintering only the outer surface of the part, with the interior coarsely processed (closed shell) or no processing with an open bottom (open shell). To be usable, the open shell design requires a backing material to support the part. This project uses ANSYS, a finite element program to analyze the strength of the open and closed shell models in an injection-molding environment. Considerations include material properties of the insert, stresses on the part, and thermal effects. The results show that Laserform ST-100 is strong enough to support injection molding as closed shell. The open shell model, however, needs to be modified because the backing material, bismuth-tin alloy does not have the mechanical or thermal properties required to withstand injection molding. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ISE-04-05 |
| Type | Thesis |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Bohez, Erik L. J.; |
| Examination Committee(s) | Anulark Techanitisawad;Pisut Koomsap Warakorn Nerdnoi; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004 |