Electrostatic lubrication of molds

Author

Brown, James D. ; Castle, G. S Peter ; Chagnon, François ; Inculet, Ion I.

Author_Institution

Appl. Electrostat. Res. Centre, Univ. of Western Ontario, London, Ont., Canada

Volume

35

Issue

1

fYear

1999

Firstpage

213

Lastpage

217

Abstract

A prototype dry electrostatic powder lubrication system for lubrication of powder metallurgy molds was designed. The system uses contact electrification to charge the powder and an electric field to aid in uniform coating of the internal surfaces of the mold. The system was mounted on a 200 t press and the sequence used in lubrication of the mold was compatible with the press sequence in which the parts are produced. Parts which were made using the prototype system and reduced lubricant powder concentration in the metal powder formulation had increased green density and strength, while still maintaining equivalent surface finish and mold lubrication for successful molding of parts

Keywords

electrostatic devices; lubrication; moulding; powder metallurgy; static electrification; contact electrification; dry electrostatic powder lubrication system; electric field; electrostatic lubrication; equivalent surface finish; green density; internal surfaces coating; metal powder formulation; powder charging; powder metallurgy molds; Coatings; Electrostatics; Feeds; Iron; Lubricants; Lubrication; Powders; Prototypes; Surface finishing; Valves;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.740868

Filename

740868