US 4,480,822 AGranted

Annealing furnace system

OwnerLuigi Mauratelliinventor

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Abstract

A furnace system is described having a rotatable table with five stations, a loading station, a preheating station, a heating station, a cooling station and an unloading station. A furnace having three compartments, a preheating compartment, a heating compartment and a cooling compartment is vertically movable so that a steel charge to be annealed located on the rotatable table may be moved from one station to another when the furnace is lifted out of contact with the table. Air ducts are provided to transfer heated air from the cooling station to the preheating station. The system is very efficient for, when one charge is cooling a succeeding charge is being heated while the next succeeding charge is being preheated. At the same time a charge can be loaded and another charge can be unloaded. Thus, five steps of an annealing cycle can be accomplished simultaneously allowing an annealed charge to be completely cycled during each step.

Claims10

Dependent claims

An annealing furnace for annealing a series of articles that are subject to deformation from planarity during such annealing, such as but not limited to metallic flat laminations and especially magnetic-grain-oriented silicon alloy "C" or "E" electrical cores;

said furnace comprising:
a preheating station for applying to each such article heat given off by cooling of a preceding such article in the series;
a heating station for applying to such article heat developed by such furnace;
a cooling station for directing heat from such article to preheat a succeeding such article in the series, and thereby to partially cool such article in the cooling station;
a movable transfer platform adapted to receive and support a plurality of such articles at defined positions on the platform and to move such articles through the preheating, heating, and cooling stations in sequence;
and
a clamping mechanism carried on the transfer platform and adapted to forcibly clamp each such article while it is in at least the heating and cooling stations.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/386,347Filed 9 Jun 1982 · division
Priority: 13 Feb 1981
Granted: 6 Nov 1984
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

F27B 9/00
Furnaces through which the charge is moved mechanically
C21D 9/46
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor: for sheet metals
C21D 9/667
Bell-type furnaces: multi-station furnaces
F27B 9/028
Of multiple-track type; of multiple-chamber type; Combinations of furnaces: multi-chamber type furnaces,