Abstract
In powder compaction, the ejection characteristics of green compact held in the die affect friction between the green compact side and die wall. The ejection characteristics are important factors for final formability of green compact. Therefore, this research studied factors that affect ejection friction. For ejection friction factors, we sought to measure lateral pressure that acts on the die wall, from compacting until ejection. We found that an increase in ejection friction coefficient does not necessarily increase ejection pressure. This phenomena was caused by lubricant that the compact supplies to the wall. By defining concrete material coefficient for powder, ejection characteristics have been explained. We found that powders with simpler shapes and/or lower yield strengths have superior ejection characteristics.
| Original language | English |
|---|---|
| Pages (from-to) | 422-430 |
| Number of pages | 9 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 62 |
| Issue number | 8 |
| Publication status | Published - 2015 Aug 1 |
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Keywords
- Die compaction
- Die wall friction
- Ejection
- Lateral pressure
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Basic study of die wall friction in ejection by lateral pressure measurement with the dual partitioning die in compaction. / Iwaoka, Taku; Ozaki, Yukiko; Fujiki, Akira.
In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 62, No. 8, 01.08.2015, p. 422-430.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Basic study of die wall friction in ejection by lateral pressure measurement with the dual partitioning die in compaction
AU - Iwaoka, Taku
AU - Ozaki, Yukiko
AU - Fujiki, Akira
PY - 2015/8/1
Y1 - 2015/8/1
N2 - In powder compaction, the ejection characteristics of green compact held in the die affect friction between the green compact side and die wall. The ejection characteristics are important factors for final formability of green compact. Therefore, this research studied factors that affect ejection friction. For ejection friction factors, we sought to measure lateral pressure that acts on the die wall, from compacting until ejection. We found that an increase in ejection friction coefficient does not necessarily increase ejection pressure. This phenomena was caused by lubricant that the compact supplies to the wall. By defining concrete material coefficient for powder, ejection characteristics have been explained. We found that powders with simpler shapes and/or lower yield strengths have superior ejection characteristics.
AB - In powder compaction, the ejection characteristics of green compact held in the die affect friction between the green compact side and die wall. The ejection characteristics are important factors for final formability of green compact. Therefore, this research studied factors that affect ejection friction. For ejection friction factors, we sought to measure lateral pressure that acts on the die wall, from compacting until ejection. We found that an increase in ejection friction coefficient does not necessarily increase ejection pressure. This phenomena was caused by lubricant that the compact supplies to the wall. By defining concrete material coefficient for powder, ejection characteristics have been explained. We found that powders with simpler shapes and/or lower yield strengths have superior ejection characteristics.
KW - Die compaction
KW - Die wall friction
KW - Ejection
KW - Lateral pressure
UR - http://www.scopus.com/inward/record.url?scp=84940390651&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84940390651&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84940390651
VL - 62
SP - 422
EP - 430
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 8
ER -