All steel srtucture, vibrating treatment of ageing for removal of internal stress,with good rigidity and stability. Torsion shaft forced synchronization of mechnaical limit stopper balance,with high precision. Integrated hydraulic transmission sysytem,large range of speed regulation to ransmission of the sliding block,stable and reliable performace. Rear stopper and the sliding block have electrical adjustment for their sroke,with manual fine tuning,and digital indication. Adjustment mechanism of sliding block independent from oil cylinder assembly to enhance sealing effect upper mold is fitted with tilting warp offest mechanism. Safe guide is optional.