scholarly journals Three-Dimensional Numerical Simulation of Segregation in Powder Injection Molding

2008 ◽  
Vol 23 (2) ◽  
pp. 208-215 ◽  
Author(s):  
F. Ilinca ◽  
J.-F. Hétu
Keyword(s):  
Numerical Simulation ◽  
Injection Molding ◽  
Three Dimensional ◽  
Powder Injection Molding ◽  
Powder Injection

The Granular Model in Powder Injection Molding

2012 ◽  
Vol 510 ◽  
pp. 455-457
Author(s):  
Yu Liu ◽  
Yi Min Li ◽  
Qing Kun Xia ◽  
Hao He ◽  
Hu You Hua ◽  
...  
Keyword(s):  
Injection Molding ◽  
Central Region ◽  
Center Of Pressure ◽  
Three Dimensional ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Filling Rate

The granular model which is fit for discontinuous bodies is applied to powder injection molding. The powder is regarded as discrete particles which are immersed into binder. The powder three-dimensional flowing in powder injection molding has been simulated based PFC. The results show that the filling rate of granulars is anisotropy and injection molding is always filled in the central region of cavity where resistance is smaller. But the angular area where resistance is large often filled be the end, even if it is close to the center of pressure.

The Optimal Structure Design of Mold in Powder Injection Molding Based on the Numerical Simulation

2009 ◽  
Vol 16-19 ◽  
pp. 55-59
Author(s):  
Zhen Xing Zheng ◽  
Wei Xia ◽  
Yuan Biao Wu
Keyword(s):  
Numerical Simulation ◽  
Optimal Design ◽  
Injection Molding ◽  
Mathematic Model ◽  
Structure Design ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Green Is ◽  
Clamp Force

The quality of the green and the shaping efficiency are affected by the mold structure during the course of powder injection molding (PIM). Based on the numerical simulation, the mathematic model for the optimal design of the gating and runner system in PIM mould is constructed. The method is testified by the Moldflow software and the experiment. From the result, it is suggested that the clamp force and the shape cycle are clearly decreased, the green is densified and the samples’ density error of the green is decreased after the optimal design of the mold structure. Furthermore, the number of trial mold is reduced and the shape efficiency is improved.

scholarly journals An Analysis of Rheological Properties of Inconel 625 Superalloy Feedstocks Formulated with Backbone Binder Polypropylene System for Powder Injection Molding

2017 ◽  
Vol 62 (4) ◽  
pp. 1937-1944 ◽  
Author(s):  
U. Gökmen ◽  
M. Türker
Keyword(s):  
Injection Molding ◽  
Average Particle Size ◽  
Three Dimensional ◽  
Powder Injection Molding ◽  
Inconel 625 ◽  
Powder Injection ◽  
Shear Stresses ◽  
Average Particle ◽  
Space Industry ◽  
Inconel 625 Superalloy

Abstract Binder formula is one of the most significant factors which has a considerable influence on powder injection molding (PIM) processes. In the study, rheological behaviors and properties of different binder systems containing PIM feedstocks, Inconel 625 powder commonly used in space industry, were investigated. The feedstocks were prepared 59%-69% (volume) powder loading ratios with three diversified binder systems by use of Polypropylene as backbone binder. The average particle size of the Inconel 625 powder used was 12.86 microns. Components used in the binder were mixed for 30 minutes as dry in three dimensional mixing to prepare binder systems. Rheological features of the feedstock were characterized by using a capillary rheometer. Viscosities of the feedstocks were calculated within the range of 37.996-1900 Pa.s based on the shear rate, shear stress, binder formula and temperature. “n” parameters for PIM feedstocks were determined to be less than 1. Influences of temperature on the viscosities of the feedstocks were also studied and “Ea” under various shear stresses were determined within the range of 24.41-70.89 kJ/mol.

Sign in / Sign up

Export Citation Format

Share Document