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Metals 2016, 6(6), 124; doi:10.3390/met6060124

Algorithm for Improvement of a Wrongly Adverted Filling Profile in Injection Flow

1
Department of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China
2
Femto-ST Institute, Department of Applied Mechanics, ENSMM Besançon, 26 Rue de l’Epitaphe, 25030 Besançon, France
3
Department of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
*
Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 17 March 2016 / Revised: 7 May 2016 / Accepted: 18 May 2016 / Published: 24 May 2016
(This article belongs to the Special Issue Metal Injection Moulding)
View Full-Text   |   Download PDF [5854 KB, uploaded 24 May 2016]   |  

Abstract

As Eulerian description is generally used for the simulation of filling flow problems in the powder injection molding process, and the governing equation of the filling state takes the form of an advection equation, the distortion can be easily produced when dealing with the filling process in complex cavities, such as the similar channels in shapes of and L, inside which the phenomena of opposite joining and bypass are involved. In order to improve the precision, causes of the unrealistic results were analyzed in the present paper. A notion similar to the upwind method was introduced and a corresponding correction method was proposed to settle this problem. Based on the efficient explicit algorithm for PIM simulation, and by means of systematic operation to modify the fluid velocity field, the untrue impact of air flow, represented by the velocity field in front of the filling fronts, can be weakened. Then, the advection of the filling state can be mainly affected by the flow field behind the filling front. The simulation results show that the correction algorithm can effectively inhibit the distortion. The simulation of the filling processes in the complex cavities, inside which the flow directions will be subject to the sudden changes, can be realized correctly. View Full-Text
Keywords: injection molding; numerical simulation; explicit algorithm; like upwind method injection molding; numerical simulation; explicit algorithm; like upwind method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shi, J.; Barriere, T.; Cheng, Z.; Liu, B. Algorithm for Improvement of a Wrongly Adverted Filling Profile in Injection Flow. Metals 2016, 6, 124.

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