To provide a hot press furnace of simple structure, that can be structured and run at low cost by avoiding the waste of continuously running elementary components and the discharge of pressurized fluid.
A total system comprises elementary components that perform on-off operation when necessary by driving a plunger type pushing pump 9 by a force feed cylinder 10, feeding hydraulic fluid being discharged from the pushing pump 9 to a cylinder 4 being provided as supplementary to push rod 1, the feeding pressure Ps of it is fed back to a controller 12b controlling the force feed cylinder 10 through a switching valve 11 so that desired pressure Pc is applied to the push rod 1 constantly and cutting out the elementary components such as an oil pressure pump being run continuously.
TAKEDA MASAO
YAMAUCHI IPPEI
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