Gas flow regulator to limit temperature rise in isostatic hot pressing system

摘要

The circulation gas regulating system (10) consists of valves (9) with electrical drives. The valves are located within the closed housing. The high temperature gas. the gas passes through the annular gap between an insulator (5) and the housing wall and flows over a thermal storage element (11). The internal region of the heating oven (7) has a connection to a temperature sensor (13) that provides an input to a rate of change of temperature processor (14). The valve generated is compared (16) with a reference (15) based upon the workpiece (8) characteristics to provide a command for the temperature regulator.