HERMETIC TYPE AIRTIGHT VESSEL FOR HOT HYDROSTATIC PRESSURIZATION TREATMENT

• Main Author: ICHIKIZAKI TETSUO
• Format: Patent
• Language: English
• Published: 01.02.1986
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

PURPOSE:To evacuate the inside of a vessel for a hot hydrostatic pressurization treatment with high reliability by attaching a specially constructed hermtetic sealing valve to the discharge port of said vessel and connecting the same to a vacuum evacuation device. CONSTITUTION:The discharge port 13 of the vessel 1 for a material (b) to be treted for use in the stage of pressurization and sintering by hot hydrostatic pressure and the discharge pipe 3 of the vacuum evacuation device 5 are connected by the hermetic sealing valve 10 consisting of a seal ring 12, a seal bearing 14 and a nut 11 fixing the same. The air in the vessel 1 is evacuated through the spacings between the valve seat 13a on the port 13 side and the bearing 14 and between the valve seat 3b on the pipe 3 side and the bearing 14 in the stage of eveacuating the inside of the vessel 1 by the device 5. The nut 11 is screwed down and is tightened to shut off the ventilation of the port 13 and the pipe 3 by the bearing 14 upon completion of the evacuation, by which the vessel 1 is thoroughly hermetically sealed from the outdoor air with high reliability.