Title :
Electrostatic lubrication of moulds
Author :
Brown, J.D. ; Castle, G.S.P. ; Chagnon, F. ; Inculet, I.I.
Author_Institution :
Appl. Electrostatics Res. Centre, Univ. of Western Ontario, London, Ont., Canada
Abstract :
A prototype dry electrostatic powder lubrication system for lubrication of powder metallurgy moulds 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 mould. The system was mounted on a 200 ton press and the sequence used in lubrication of the mould 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 mould lubrication for successful moulding of parts
Keywords :
electric fields; electrostatics; lubrication; powder metallurgy; static electrification; contact electrification; dry electrostatic powder lubrication; electric field; electrostatic lubrication; increased green density; increased strength; internal surfaces; metal powder formulation; moulds lubrication; powder charging; powder metallurgy moulds; uniform coating; Coatings; Electrostatics; Feeds; Filling; Iron; Lubricants; Lubrication; Powders; Prototypes; Valves;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.626283
