HOT AIR CIRCULATION FURNANCE

摘要

A hot air circulation furnace for heating an object to be heated up to a specified temperature by circulating hot air in the furnace. Although small in size, the furnace enables continuous processing and is capable of being provided with a heating zone and a soaking zone by using flows of hot air with the same temperature. The furnace is separated into an outer periphery side region (6) and an inner region (7) by an annular partition (8), floor, and paths (9, 10) near the ceiling. Hot air supplied from a heat source (5) is expelled by an axial-flow fan (11) toward a hearth (2), to the inner region (7). This forms in the furnace a circulation flow passing a to-be-heated object placement table (23) in an annular shape on the rotating hearth (2) installed in the outer periphery side region (6), and while the hearth (2) makes one rotation, to-be-heated objects on the table (23) are raised in temperature up to a predetermined level before taken out in sequence to the outside of the furnace. Further, a partition (12) whose opening on the exit side ?<sub