US 4,986,750 A · Furnace

Abstract

Disclosed is a furnace in which the inside of the furnace is enclosed by a furnace wall having an inner surface lined with a heat insulating material. Heaters for heating an inside of the upper furnace chamber to a predetermined temperature, and an upper turntable supported so as to be rotatable horizontally and arranged to mount works on an upper surface thereof are provided in the upper furnace chamber. Other heaters for heating the inside of a lower furnace chamber to a predetermined temperature, and a lower turntable supported so as to be rotatable horizontally independently of the upper turntable and arranged to mount works on an upper surface thereof are provided in the lower furnace chamber. Delivery of a work from/to the outside of the furnace to/from each of the upper and lower turntables is performed by insertion of a fork through an opening formed in a predetermined position of the furnace wall. In this structure, for example, carburizing treatment on a work is carried out in the upper furnace chamber and diffusion treatment on a work is carried out in the lower furnace chamber.

Claims13

Dependent claims

A furnace for applying heat treatment for works, comprising,

a furnace wall for forming a casing of the furnace and having at least one opening,
a partition horizontally situated inside the furnace wall for vertically dividing the furnace into at least first and second furnace chambers,
a first turntable horizontally and rotationally situated inside the first furnace chamber, said first turntable supporting the works thereon,
a second turntable horizontally and rotationally situated inside the second furnace chamber, said second turntable supporting the works thereon,
means for rotating the first and second turntables, said rotating means being connected to the first and second turntables to independently rotate the same at predetermined speed,
means for transferring works onto and from the first and second turntables through the opening of the furnace wall,
first heating means situated inside the first furnace chamber to keep temperature inside the first furnace chamber at predetermined temperature, and
second heating means situated inside the second furnace chamber to keep temperature inside the second furnace chamber at predetermined temperature.

5 more elements

Dependencies are inferred from the claim text.

Furnace

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Furnace

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Abstract

Claims13