Patent ID: 7238013

Claim:
A gas cycle apparatus for a tire vulcanizer, the apparatus comprising: a bladder expanding and contracting under the supply/discharge of a heating gas; a gas circulating flow path constituted by allowing a forward flow path connected to a supply port of the bladder and a return flow path connected to a discharge port of the bladder, to communicate with each other through a circulation valve; a gas feeder provided in the gas circulating flow path; a gas supply flow path connected to the forward flow path, and a gas discharge flow path connected to the return flow path; and a gas supply valve provided in the gas supply flow path, and a gas discharge valve provided in the gas discharge flow path, wherein an air-water separation section is provided on the way through the return flow path in the gas circulating flow path; wherein the return flow path is connected to an upper space of the air-water separation section, and the gas discharge flow path is connected to a lower space of the air-water separation section; and wherein, after vulcanization molding has been completed, in a state where the circulation valve and the gas discharge valve are opened and the gas supply valve is closed, the gas feeder is operated, and thereby heating gas filling the inside of the bladder and the gas circulating flow path is discharged from the gas discharge flow path, while discharging drain stored in the air-water separation section from the gas discharge flow path.