precoat sand casting

Precoated sand casting is a precision sand casting process that utilizes precoated sand — quartz sand particles uniformly coated with a resin binder film (typically phenolic resin) and curing agents — as the core and mold material. This process is widely recognized for its high dimensional accuracy, excellent surface finish of castings, and strong adaptability to complex structural components, making it a preferred technology in automotive, machinery, valve, and pipe fitting manufacturing industries.