Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Patent
1995-04-11
1996-11-12
Jordan, Charles T.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
419 54, 419 31, 148513, B22F 100
Patent
active
055749550
ABSTRACT:
A method and a device for heating powder, especially for preheating powder in view of subsequent compacting, are disclosed. The powder is divided into partial flows which are heated separately to a predetermined temperature. Then, the partial flows are brought together to form a common flow of heated powder. The partial flows are so heated that an uniform temperature is attained over essentially the entire cross-section of each of the partial flows before these are brought together. The device comprises a storage container (10) for the powder, and a heating unit (20) for receiving powder from the storage container (10) and heating it. The heating unit (20) comprises a plurality of spaced-apart heating surfaces (27) defining between them a plurality of flow channels (28) for the powder.
REFERENCES:
patent: 3738794 (1973-06-01), Thelen
patent: 4209320 (1980-06-01), Kajinaga et al.
patent: 4223874 (1980-09-01), Kajinaga et al.
patent: 4725227 (1988-02-01), Hailey
patent: 4874312 (1989-10-01), Hailey
patent: 4913641 (1990-04-01), Zahradnik
Johansson Michael
Stromgren Mats
Hoganas AB
Jenkins Daniel
Jordan Charles T.
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