The setting ofprocess parameters is related to the characteristics of design, such as casting dimension tolerance, casting weight tolerance and machining allowance, etc. casting shrinkage, mold slope and minimum casting hole (groove) are affected by casting material, casting structure and mold structure. At the same time, the determination of casting process plan needs to integrate the casting process, production site and the number of casting auxiliary equipment, and the setting of process parameters determines the casting process flow and casting forming quality. Related studies show that, in the design stage, the relationship between product information carriers (material features, shape features, quality characteristics, etc.) and carbon emissions and production time is studied, which can effectively improve the feasibility of process plan design and help to reduce carbon emissions. Therefore, it is necessary to study the influence mechanism of the process parameters related to the process design characteristics of sand casting.
Taking the characteristics of casting materials as an example, the selection of different molding sand materials will lead to different composition of molding sand, such as wet sand using new sand, bentonite and pulverized coal as raw materials and water as binder to ensure the compactness and strength of the mold; chemical adhesive sand uses raw sand and curing agent as raw materials and synthetic resin as adhesive. Different moulding sand materials make the density and heat storage coefficient of moulding sand different, which affect the process parameters such as pouring time and pouring temperature. The final amount of mold sand will be different with the difference of mold strength and old sand recovery process, and the treatment of waste sand, waste gas and other pollutants will also affect the production of carbon emissions in the casting process. Secondly, the process parameters such as casting dimension tolerance, casting weight tolerance, machining allowance and process correction are affected not only by casting process methods and casting production batches, but also by casting alloy types, molding materials and other characteristic factors. Among them, the setting of different machining allowance and process correction of castings will directly affect the net weight of castings, resulting in different amounts of casting metal materials such as pig iron, return iron and scrap, and at the same time change the arrangement of casting process and production time. In summary, the setting of process parameters related to the characteristics of casting materials will have varying degrees of impact on resource consumption, carbon emissions, productivity and yield in the casting process.