All water-cooling systems require proper maintenance to ensure the passages do not become clogged with scale from minerals in the water. To combat this issue,

  de-mineralized water can be used or the passages can be cleaned regularly with a cleaning solution.
 

  A second concern with all water-cooling systems is constant flow rate because permanent molds require different water flow control throughout the solidification process. Computer-based systems can monitor temperatures at various locations throughout the mold and send a signal to the water flow-control unit to vary the flow of water to the mold. In addition, these systems can supply more coolant when mold temperature is high and less coolant when temperature is low.
 

  Both technical and economic analyses should be performed before choosing the suitable cooling system design for a jobs tool. In selecting the most cost-effective mold cooling system, several technical factors must be taken into account such as the casting weight, casting moduli and section thickness, production cycle times and quality, production run of castings, and expected mold life. Overall, the final decision should be made based on the estimated cost of finished castings.   

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