Dry die wall lubrication

B - Operations – Transporting – 22 – F

Patent

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B22F 3/02 (2006.01)

Patent

CA 2286159

A method for high density long fill compaction of metallic powders uses a precisely temperature controlled mold and a dry sprayed lubricant which has the characteristic of softening on contact with the mold and smearing on the mold wall during compaction, yet on ejection not causing powder adherence.

Cette invention concerne un procédé de compactage de poudres métalliques qui permet d'obtenir un remplissage de haute densité et de grande longueur. Ce procédé fait appel à un moule dont la température est réglée avec précision, ainsi qu'à un lubrifiant vaporisé à sec. Ce dernier a la particularité de se ramollir lorsqu'il entre en contact avec le moule et de s'étaler sur la paroi du moule lors du compactage, ceci toutefois sans entraîner d'adhésion de la poudre lors de l'éjection.

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