The present invention relates to blow molding machines, in particular to a mold clamping mechanism in a hollow plastic molding machine, comprising platens, molds, mold locking cylinders and a mold locking and fastening mechanism. The mold locking cylinders are mounted on the back face of the platens, a plurality of mold locking cylinders can be arbitrarily mounted on the two platens, corresponding mold locking mechanisms are arranged on the platens opposite to the mold locking cylinders, and the lock catches of the mold locking cylinders can enter the inner cavity of ferrules in the mold locking mechanisms. A piston rod in the oil cylinder of the mold locking mechanism drives a sizing sleeve to move forward, feeding one end of the ferrule into the inner cavity of the sizing sleeve. The constriction grooves on the ferrule are narrowed, and a cylinder identical to the recessed cavity on the lock catch is formed at the front end of the ferrule, thus locking the lock catch tightly. The present invention has a simple structure, convenient operation and long service life.
Country Code: CN
Application Number: CN201210355427.4
