Modeling of mold filling process for powder injection molding

1991 ◽  
Vol 31 (15) ◽  
pp. 1137-1148 ◽  
Author(s):  
Liaquat Ali Najmi ◽  
Daeyong Lee
Keyword(s):  
Injection Molding ◽  
Mold Filling ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Filling Process

SIMULATION OF MOLD FILLING IN POWDER INJECTION MOLDING

Equipment ◽  
2006 ◽  
Author(s):  
S. K. Samanta ◽  
H. Chattopadhyay ◽  
M. M. Godkhindi ◽  
B. Pustal ◽  
R. Berger ◽  
...  
Keyword(s):  
Injection Molding ◽  
Mold Filling ◽  
Powder Injection Molding ◽  
Powder Injection

Study on Binder System for Micro Powder Injection Molding of ZrO2 Ceramic

2012 ◽  
Vol 706-709 ◽  
pp. 1948-1954
Author(s):  
Lin Liu ◽  
X.L. Ni ◽  
Hai Qing Yin ◽  
Xuan Hui Qu
Keyword(s):  
Injection Molding ◽  
Large Scale ◽  
Dimensional Accuracy ◽  
Mold Filling ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Scale Production ◽  
Binder System ◽  
Widespread Application ◽  
Debinding Process

Micro powder injection molding has been accepted as a potential forming technology for large-scale production of miniature components in industries. However, mold filling capability is often poor due to the blind hole structure of the die cavity, which restricts the widespread application of this technique. In this paper, ZrO2 micro gears with addendum circle ranging from 900μm to 200μm were studied. Instead of using traditional PW-HDPE-SA binder as in powder injection molding, thermoplastic binder system is optimized here for better replication of micro gear. It is found that the dimensional accuracy and demold after injection molding can be improved by utilizing proper binder system. ZrO2 feedstock with a powder loading of 46vol.% and the binder system consisting of BW, HDPE and SA was successfully injection molded and demolded, which indicates good mold filling capability and sufficient demolding strength. The binder system was successfully removed by debinding process in two steps, solvent debinding followed by thermal debinding. Debound components free of defects were obtained. Keywords: Micro powder injection molding, ZrO2 feedstock, Binder system, Molding filling capability, Demolding strength

Sign in / Sign up

Export Citation Format

Share Document