A hydraulic unit ensures the circulation of pressurized cooling water (from 3 to 20 bars) for a given period of time in the circuits of small diameter injectors (Ø from 1,2 to 2,8 mm) inserted in the specific core pins.

At the end of the cooling period, a pneumatic distributor injects air in the injector’s circuits to purge it. In this way, the cycle can be carried out safely without the presence of water inside the circuits.

The cooling cycle is synchronized by adjustable temporizations with the die-casting machine.