In the production process of sand casting, due to the difference of casting process, different process design characteristics have different effects on energy, materials and so on. According to the classification of process planning features in the previous chapter, a quantitative model under the influence of process planning features can be established, and the changes affected by process planning features can be analyzed, so that it can be effectively targeted and optimized. The carbon benefit model of sand casting process design characteristics will be established through several important quantitative models.

The content of carbon benefit is explained, and the quantitative model of carbon emission, production time and resource cost under the influence of process planning characteristics is established by combining the classification of process planning characteristics. The carbon emissions under the influence of process planning characteristics are divided into material carbon emissions, energy carbon emissions and process carbon emissions related to process planning characteristics; the production time under the influence of process planning characteristics is divided into the processing time of the main equipment associated with the process planning characteristics and the auxiliary processing time. The resource cost under the influence of process planning characteristics is divided into energy cost, material cost, labor cost and residual cost associated with process planning characteristics. At the same time, the carbon benefit model is proposed by combining three quantitative models. The carbon benefit model can evaluate the comprehensive benefits of sand casting process according to different casting strategies, so as to improve the level of energy saving and emission reduction in the foundry industry.