According to the characteristics of sand casting process design, the carbon benefit model is established, which can realize the low-carbon evaluation of sand casting process. In order to further improve the sustainability of the casting process, taking the characteristic carbon benefit of process design as the optimization goal, the process parameter design related to the characteristics of casting process design was optimized. Taking the porosity and porosity in the casting simulation results as the quality verification index of the casting process plan, and focusing on the related process parameters of the casting geometric structure and pouring characteristics in the process design features as the optimization object, it can not only ensure the casting quality, but also improve the resource utilization of casting production and reduce carbon emissions.

The influence mechanism of the process parameters related to the characteristics is discussed, and it is explained that the setting of the casting process parameters will have a certain impact on the material, energy consumption, waste discharge and production time of the casting process. Therefore, it is necessary to design the sand casting process parameters reasonably. As mentioned earlier, the characteristics of casting materials, such as alloy types, molding materials and auxiliary materials, depend on the casting process, production conditions and application scenarios of castings, and usually remain unchanged as a fixed part in foundry production. Although the process parameters related to the characteristics of casting materials, such as casting dimensional tolerance, machining allowance and so on, will be affected by material properties, the main influencing factors are the complexity of casting structure, modeling methods and the accuracy and quality of tooling equipment, that is, they are more related to casting geometric structure features. At the same time, the process parameters related to pouring characteristics, such as pouring time, pouring temperature and critical speed of liquid metal filling, play an important role in regulating liquid metal filling capacity and controlling casting defects. Therefore, according to the characteristics of sand casting process, the design of process parameters is focused on the relationship between casting geometric structure and pouring characteristics.

Firstly, the design of characteristic parameters of sand casting process design is analyzed, and then the objective function of parameter optimization is established, which takes the machining allowance of hole, the number of sand core and pouring time as the optimization object. a process parameter selection method based on carbon benefit is put forward. Finally, the low-carbon optimization steps of the characteristic parameters of sand casting process design are explained.