An injection-blow-moulding mould comprising: a punch defining an inner surface of preforms; a blow-moulding cavity defining an outer surface of containers to be obtained by blowing injected preforms, the blow-moulding cavity being configured to receive therein the punch with one of the preforms arranged on the punch in a hot and soft state; a blowing device configured to deliver a pressurised gas to the interior of the preform through at least one blow opening located in the punch when the punch carrying the preform is located inside the blow-moulding cavity; and wherein the at least one blow opening is connected to a first conduit which is in communication with a first source of pressurised gas supply configured to supply pressurised gas through the at least one blow opening at an overpressure above a blowing pressure, the blowing pressure being a pressure suitable to blow the preform into the container; and wherein the blowing device further comprises at least one exhaust opening located in the punch at a position spaced apart from the at least one blow opening and connected to a second conduit which is in communication with a pressure-limiting device set at the blowing pressure, the pressure-limiting device allowing the gas inside the container, when it exceeds the blowing pressure, to escape through the at least one exhaust opening; thereby a gas stream is created inside the container from the at least one blow opening to the at least one exhaust opening that cools an inner surface of the container. characterized in that the pressure-limiting device comprises a second pressurised gas supply source in communication with the second conduit and configured to supply pressurised gas through the at least one exhaust opening at the blowing pressure and to retrieve pressurized gas flowing out the container through the at least one exhaust opening when the pressure in the interior of the container is above the blowing pressure. a punch defining an inner surface of preforms; a blow-moulding cavity defining an outer surface of containers to be obtained by blowing injected preforms, the blow-moulding cavity being configured to receive therein the punch with one of the preforms arranged on the punch in a hot and soft state; a blowing device configured to deliver a pressurised gas to the interior of the preform through at least one blow opening located in the punch when the punch carrying the preform is located inside the blow-moulding cavity; and wherein the at least one blow opening is connected to a first conduit which is in communication with a first source of pressurised gas supply configured to supply pressurised gas through the at least one blow opening at an overpressure above a blowing pressure, the blowing pressure being a pressure suitable to blow the preform into the container; and wherein the blowing device further comprises at least one exhaust opening located in the punch at a position spaced apart from the at least one blow opening and connected to a second conduit which is in communication with a pressure-limiting device set at the blowing pressure, the pressure-limiting device allowing the gas inside the container, when it exceeds the blowing pressure, to escape through the at least one exhaust opening; thereby a gas stream is created inside the container from the at least one blow opening to the at least one exhaust opening that cools an inner surface of the container. characterized in that the pressure-limiting device comprises a second pressurised gas supply source in communication with the second conduit and configured to supply pressurised gas through the at least one exhaust opening at the blowing pressure and to retrieve pressurized gas flowing out the container through the at least one exhaust opening when the pressure in the interior of the container is above the blowing pressure.