this invention cools the blowing mold and the plastic article blown therein to shorten the time that a core rod must remain at a blowing station of a blow molding machine for making plastic articles . the cooling is performed by conditioned air that is dried to lower its dew point . an air curtain is used to prevent other air from contacting with and depositing moisture on the mold . in order to take advantage of the shorter time at the blowing station , an auxiliary injection device is used to also shorten the time required for the injection operation ; and auxiliary cooling is supplied to the core rod at the stripper station .