The present utility model provides a leak-proof mold clamping oil cylinder for an injection blow molding machine, comprising a piston rod, a cylinder barrel, a lower cylinder cover and a guide copper sleeve. A through oil collecting hole is formed in the side surface of the guide copper sleeve. After the U-shaped rubber sealing ring of the cylinder cover is aged and worn, hydraulic oil concentrated between the U-shaped rubber sealing ring and the dust ring can be discharged through the oil collecting hole, avoiding the situation that hydraulic oil breaks through the seal of the dust ring, preventing hydraulic oil leakage, avoiding product contamination, reducing the number of customer shutdowns for maintenance and improving production efficiency.

Country Code: CN

Application Number: CN202023319232.3