Water mist effect on heat transfer coefficient in cooling of casting die

This project is showing investigation results of heat transfer process between cast iron die and environment during cooling of die in the temperature range 600÷100 C with compressed air, spray water and water mist streamed under pressure 0.35 0.45 MPa in air jet0.3 0.4 MPa .At the paper are shown results of cooling die’s flat wall using open cooling system. The temperature gradient was presented at die’s wallthickness and calculated thermal curve for cooling surface. The calculation results of heat transfer coefficient α were presented between die and researched cooling factors and also mathematical models of α coefficient depending on surface temperature. Revealed that coefficient α has the biggest value’s range for die cooling with water mist under pressure 0.3/0.35 MPa.