Economic evaluation of semi-solid die casting process

Abstract

       Semi-solid die casting process (SSDC) is a newly developed technology to improve the products quality to reduce the process cost of liquid die casting. In the research, we used a gas induced semi-solid process (GISS) to generate the semi-solid metal. The objective of this research is to show the reduction of product cost per unit when change the process from liquid die casting process to the semi-solid die casting process. The method of process-based costing model (PBCM) is applied to analyze costs of product. The principle of PBCM consists of three sub-models: process model, operation model and financial model. The result of this study is found that there are three main factors affected the reduction of cost per unit. Those factors include cycle time, rate of waste, and die life. The product cost was decreased by approximately 13.49% after change the process to semi-solid die casting process.