The three-beam and four-column structure, optimized by computer, is simple, economical and practical. The hydraulic control system adopts a cartridge valve integrated system, which has reliable action, long service life, small hydraulic shock, and reduces the connection pipeline and leakage points. Independent power control system, reliable operation, intuitive action and convenient maintenance. It adopts button centralized control and has two operation modes: adjustment (inching) and single (semi-automatic). It can realize the two molding processes of fixed stroke and fixed pressure, and has the properties of time delay. The working pressure and stroke can be adjusted within the specified range according to the process requirements.