Micro powder injection molding: process characterization and modeling
The development of a new simulation tool for micro powder injection molding (MicroPIM) needs experimental material data and verification experiments to describe the process correctly. A new and innovative approach is to use dissipative particle dynamics (DPD) to describe the form filling process with respect to the interactions on a mesoscopic scale (Hoogerbrugge and Koelman in Europhys Lett 19(1):155–160, 1992). The individual parameters that enter DPD modeling of this process have to be adjusted using specially designed experiments for the injection molding process. The material properties in the standard injection molding process are primarily determined by the bulk material. In micro dimensions surface effects begin to dominate because of the large surface to volume ratio. Therefore, the surface interactions between feedstock and mold insert were studied. Finally, first observations of the injection molding experiments are shown and qualitatively compared to DPD simulation results.
- Bilovol VV, Kowalsky L, Dusczyk J, Katgerman L (2001) Comparative study of different simulation programs for modelling of powder injection Moulding. In: Proceedings of the European congress on powder metallurgy, vol 44(3), pp 129–134Google Scholar
- Cho J, Sanchez IC (1999) PVT relationships and equations of state of polymers. In: Brandrup J, Immergut EH, Grulke EA (eds) Polymer handbook. Wiley, New York, pp 591–601Google Scholar
- Español P (1996) Dissipative particle dynamics for a harmonic chain: a first principles derivation. Phys Rev E 53:1572–1578Google Scholar
- Giridharan MG et al (2001) Multidisciplinary CAD system for MEMS. J Model Simulat Microsyst 2:43–50Google Scholar
- Westin KJA, Breuer KS, Choi CH, Huang P, Cao Z, Caswell B, Richardson PD, Sibulkin M (2001) Liquid transport properties in submicron channel flows. In: Proceedings of 2001 ASME international mechanical engineering congress and exposition, November 2001, New York, pp 1116Google Scholar
- Wolf HJ (1994) PCProgramme für die Füllsimulation beim Spritzgießen. Ztsch. Kunststoffe, p 84Google Scholar