The effect of wax composition on the injection molding of carbonyl iron powder with LDPE

Kung-Chung Hsu, C. C. Lin, G. M. Lo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW or PW. Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190 °C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalCanadian Metallurgical Quarterly
Volume35
Issue number2
Publication statusPublished - 1996 Jan 1

Fingerprint

Iron powder
Waxes
Low density polyethylenes
Polyethylene
Injection molding
Paraffin waxes
Chemical analysis
Polyethylenes
Binders
Tensile strength
Sintering
Activation energy

ASJC Scopus subject areas

  • Metals and Alloys
  • Industrial and Manufacturing Engineering

Cite this

The effect of wax composition on the injection molding of carbonyl iron powder with LDPE. / Hsu, Kung-Chung; Lin, C. C.; Lo, G. M.

In: Canadian Metallurgical Quarterly, Vol. 35, No. 2, 01.01.1996, p. 181-187.

Research output: Contribution to journalArticle

@article{8213da25d469422f883160292d7dc673,
title = "The effect of wax composition on the injection molding of carbonyl iron powder with LDPE",
abstract = "The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW or PW. Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190 °C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.",
author = "Kung-Chung Hsu and Lin, {C. C.} and Lo, {G. M.}",
year = "1996",
month = "1",
day = "1",
language = "English",
volume = "35",
pages = "181--187",
journal = "Canadian Metallurgical Quarterly",
issn = "0008-4433",
publisher = "Maney Publishing",
number = "2",

}

TY - JOUR

T1 - The effect of wax composition on the injection molding of carbonyl iron powder with LDPE

AU - Hsu, Kung-Chung

AU - Lin, C. C.

AU - Lo, G. M.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW or PW. Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190 °C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.

AB - The effect of waxes on the injection molding of carbonyl iron powder with low-density polyethylene (LDPE) have been examined. Four waxes, paraffin wax (PW), polyethylene wax (PEW), carnauba wax (CW) and acrawax (AW) were selected and compared. Experimental results indicated that the LDPE-rich phase was found to be separated from the wax-rich phase in the binder mixture containing AW, CW or PW. Polar AW or CW showed stronger interactions or adsorptions with iron powder than other nonpolar waxes. AW/LDPE and CW/LDPE mixtures appeared to exhibit higher viscosity, greater pseudoplasticity and lower flow activation energy than PW/LDPE and PEW/LDPE mixtures. Tensile bar specimens of all binder mixtures could be injection molded at an injection temperature of around 170-190 °C, and a pressure of around 5-6 MPa. Except for the PEW/LDPE mixture the parts derived from the other three binder mixtures showed good surface appearance following debinding and sintering. Specimens based on the PW/LDPE mixture exhibited the highest tensile strength in the resulting sintered parts, followed those based on CW/LDPE, AW/LDPE, and PEW LDPE mixtures. The difference in tensile strength of each part results from different flow properties of each wax/LDPE mixture.

UR - http://www.scopus.com/inward/record.url?scp=0030126430&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030126430&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0030126430

VL - 35

SP - 181

EP - 187

JO - Canadian Metallurgical Quarterly

JF - Canadian Metallurgical Quarterly

SN - 0008-4433

IS - 2

ER -