​Selection of chilled iron materials in precision castings

In order to increase the speed of local cooling of castings in precision casting, the chiller placed inside the mold cavity and on the surface of the working surface is called a cold iron. In the production of precision casting companies, we often use cold iron, pouring operating system and riser to control the solidification and formation process of the casting and obtain a qualified casting.

The choice of cold iron materials allows for a variety of cold iron materials. Metal materials and non-metallic materials with larger thermal conductivity and heat storage coefficient than sand materials can be used. Commonly used cold iron materials in production include cast iron, aluminum alloy, graphite, copper alloy, etc. Cast iron cold iron has a large heat storage coefficient, can absorb more heat, and has strong cooling capacity. In addition, cast iron cold iron is easy to manufacture and low-cost, and is widely used in the precision casting production of aluminum alloys and magnesium alloys, especially when it is placed at the bottom or end of the casting to enhance the solidification sequence of the casting. It is often used as a cast iron cold iron . In addition, aluminum chilled iron is also widely used.