Mold locking device for filter press

The utility model discloses a mould locking device for a filter press, which comprises a clasping nut assembly and a support screw rod assembly, the support screw rod assembly is fixedly connected with a main oil cylinder of the filter press, the clasping nut assembly comprises an upper mould, a lower mould and a clasping hydraulic cylinder, the clasping hydraulic cylinder is used for driving theupper mould and the lower mould to open and close, and the clasping hydraulic cylinder is used for locking the clasping hydraulic cylinder. Wherein the upper die and the lower die are respectively provided with a half threaded hole, when the upper die is separated from the lower die, the supporting screw rod assembly is arranged between the half threaded hole of the upper die and the half threadedhole of the lower die in a penetrating mode, and when the upper die and the lower die are combined, the half threaded hole of the upper die and the half threaded hole of the lower die are combined into a complete threaded hol