Patent ID: 6375740
Filing Date: 2002-04-23
Classification: C23C

Abstract:
A hot dipping apparatus comprising:a heating furnace for heating or annealing a workpiece to be plated; a melting furnace for melting an ingot of a plating material and containing a molten plating material in which the workpiece is immersed to be coated with the molten plating material for plating; an ingot carrying device for carrying the ingot to a place near the melting furnace; an ingot feed device for feeding the ingot carried by the ingot carrying device into the melting furnace; an ingot preheating furnace mounted so as to enclose the ingot carrying device for preheating the ingot; and an exhaust gas line for supplying an exhaust gas discharged from the heating furnace to the ingot preheating furnace; wherein the exhaust gas to be supplied into the ingot preheating furnace has a temperature below a melting point of the ingot.