Abstract: Thermostat lower casing have many problems,like buckling deformation,unequal shrinkage and so on.To solve these problems,use the Pro/E software and the Moldflow software to establish 3D models and make cavity design of the thermostat lowering casing.Moreover,EMX is applied for formwork addition to accomplish the design of hot runner injection mold.The effective combination of structure of innovative design and hot runner technology could streamline the mold structure and compact the layout structure to result in a better forming quality.

Key words: thermostat, injection mold, hot runner technology, Moldflow