Vacuum protective atmosphere dual-purpose sintering furnace for part formed in metal powder injection molding mode

The utility model relates to the technical field of vacuum sintering furnaces, in particular to a vacuum protective atmosphere dual-purpose sintering furnace for a part formed in a metal powder injection molding mode. The sintering furnace comprises a furnace shell with doors arranged at the two ends, and a furnace body supporting frame for supporting the furnace shell, wherein a square thermal-insulation screen is installed in the furnace shell and internally provided with three heating bodies which are molybdenum plate heating bodies, the heating bodies are fixedly connected with the furnace shell through a product supporting frame, and the heating bodies are connected with molybdenum electrodes. The molybdenum plate heating bodies are arranged in the furnace shell and made of high-purity molybdenum materials, and therefore the dual-purpose sintering furnace can achieve both a vacuum sintering mode and an atmosphere sintering mode, both inert gas and combustible gas can be used for the atmosphere sintering mode, and therefore switching use between vacuum sintering and atmosphere sintering can be achieved according to the sintering requirement of materials, and not only is the equipment utilization rate be increased, but also the sintering efficiency can be improved.