Patent ID: 8354054

Claim:
A method for blow molding containers, in which a preform is thermally conditioned, stretched by a stretch rod inside a blow mold, and shaped into the container by the action of blowing pressure, and in which pressurized gas is fed into the container, wherein, after a maximum blowing pressure has been reached in the blow mold ( 4 ) and with the start of a pressure drop a cooling gas is conducted out of the stretch rod ( 11 ) in the direction of the base of the blow-molded container ( 2 ), wherein pressurized blowing gas that has flowed into an interior space of the stretch rod before a cooling process and during the blow molding is used as the cooling gas, wherein the cooling gas is supplied to the stretch rod ( 11 ) from a high-pressure blowing gas source wherein the cooling gas flows out of a reservoir in the stretch rod ( 11 ), wherein the reservoir of the stretch rod ( 11 ) is filled with blowing gas from an interior space of the blow mold ( 4 ).