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Numerical simulation and additive manufacturing technology in design of knee implant patterns

ALEKSANDAR RAJIC1,* , ELEONORA DESNICA2, SLOBODAN STOJADINOVIC2, DORIAN NEDELCU3

Affiliation

  1. Technical College of Applied Sciences in Zrenjanin, Zrenjanin, Republic of Serbia
  2. Technical Faculty “Mihajlo Pupin”, Zrenjanin, University of Novi Sad, Republic of Serbia
  3. “Eftimie Murgu” University of Resita, Resita, Romania

Abstract

The paper presents the possibilities to apply Numerical Simulation and Additive Manufacturing (AM) technology in designing the prototypes of master patterns of knee implants for investment casting. The master pattern manufacturing by wax injection is the starting operation in the investment casting procedure. Errors caused by shrinkage, air traps and the lower quality of surface roughness may occur in the wax injection process. The software SolidWorks Plastics was used in this research in order to avoid these errors. The software analyzed the fill time, gate location, temperatures and pressures. The second part of the research presents the comparison of different AM processes (Selective Laser Sintering, 3D Printing and PolyJet) considering the characteristics of the material and the manufacturing time of the prototypes of knee implant patterns..

Keywords

Numerical simulation, Additive manufacturing, Master pattern, Investment casting, Knee implant.

Submitted at: July 16, 2014
Accepted at: Sept. 11, 2014

Citation

ALEKSANDAR RAJIC, ELEONORA DESNICA, SLOBODAN STOJADINOVIC, DORIAN NEDELCU, Numerical simulation and additive manufacturing technology in design of knee implant patterns, Journal of Optoelectronics and Advanced Materials Vol. 16, Iss. 9-10, pp. 1180-1190 (2014)