Investment casting mainly has four major processes: wax making - shell making - casting - post-processing. Only after completing these four major processes can castings be produced. Later, other processes such as processing or surface treatment can be carried out according to customer requirements. And these four major processes can be specifically divided into more than 20 sub-processes. The specific process introduction can be learned in this article. "The process flow and production cycle of silica sol dewaxing casting" https://dz-machining.com/investment-casting/