Mold locking mechanism for hydraulic press

A mold locking mechanism for a hydraulic press comprising:

• a bottom plate;
• wherein a pull stud is inserted through the bottom plate, and the pull stud includes a shank and multiple defining rings separately fitted on the shank, a top face of a respective one defining ring is a conical surface, and the bottom plate further includes a clamper and a drive device, wherein the clamper includes a pair of rotatable arms intersected on a top of the bottom plate, two front sections of the pair of rotatable arms are located beside the pull stud, and at least one resilient element is defined between two rear sections of the pair of rotatable arms;
• wherein when the clamper is in a clamping state, the at least one resilient element forces the two front sections of the pair of rotatable arms to move close to each other, and the respective one defining ring of the pull stud does not pass across a gap of the two front sections of the pair of rotatable arms;
• and
• wherein the drive device drives the pair of rotatable arms to rotate so that the clamper is switched to be in a unclamping state, and the respective one defining ring of the pull stud moves across the gap of the two front sections of the pair of rotatable arms after the pair of rotatable arms move away from each other.