Heating – Work chamber having heating means – Having means by which work is progressed or moved mechanically
Patent
1977-04-07
1978-11-14
Yuen, Henry C.
Heating
Work chamber having heating means
Having means by which work is progressed or moved mechanically
432153, 432144, 266 87, 432243, 198742, F27B 904, F27B 914
Patent
active
041253655
ABSTRACT:
An apparatus for heating billets and the like prior to hot extrusion is disclosed. The apparatus includes an elongated, insulated tunnel having an inlet opening and an outlet opening. A conveyor extends through the tunnel from the inlet to the outlet and conveys a plurality of equally spaced, transversely arranged billets in a step-like manner. The conveyor rotates the billets as they are conveyed through the tunnel. A source of high temperature air is connected to a plenum positioned above the conveyor. High temperature air is discharged from the plenum through a plurality of slot-like jets positioned above the billets so that the air directly impinges on the billets. Temperature probes are included for insuring that the billets are biased to one side of the conveyor upon discharge and for sensing the billet temperature to control the air temperature within the tunnel. An unloader is provided for receiving the billets discharged from the tunnel and rotating them through an angle of 90.degree. and to a position for transfer to an extrusion press.
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patent: 4050200 (1977-10-01), Bartos
Oliver Machinery Company
Yuen Henry C.
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