Casting, one of the oldest in industrial history, consist of two main procedures, sand molding and metal melting. The casting process basically consist of casting the liquid metal into a mold with a cavity in the desired geometry for the final component. The core is defined as the part of the mold that creates the cavities in the part or the hole that goes through the casting. The sand, which is cured with acid and resin in the mixer, is taken into the sand chamber in the core machine and sprayed into the crate through nozzles at an air pressure of 2-6 bar. The ineffective cooling of the nozzle and its surroundings during the core cooking process in the crate, causes the sand sprayed from the nozzles to solidify and blockage. As a result of this blockage, with the narrowing of the section, the sand flow is disrupted and the productivity decreases, negatively affecting the production quality. Mains water is used in the existing system to cool the nozzles in the core crates and after the cooling process the water used is heated up to 35°C and transferred to the manhole as waste water. As a result of the rising water temperature in the summer months and the increasing blockages at the nozzle tips, more water is used for the cooling system, which leads to water waste and increased costs. In this study, closed loop water circulation system and mechanical vapor compression refrigeration system with R134a refrigerant were designed and analyzed. With this new design, a water saving of 13.851 m3/year and an annual saving of 51.935.77 TL was achieved in a core box, and a new method was put forth to reduce water waste in this context.