A green sand casting process for the center filler of railway freight car was designed and developed.On the base of the green sand molding process of ZZABC,combined with the foundry process method of steel castings,the difficulties in the process of cen-ter filler are analyzed and the appropriate process scheme is selected.The casting process of two castings in one mold of top injection was adopted,and the feasibility of the casting process was confirmed by combining the preliminary simulation and optimization results.Through trial production and casting inspection,the casting quality is confirmed to meet the technical requirements,and combined with the actual mass production results,to ensure that the qualified rate of casting center filler is more than 95％.
center fillertop gatingtwo castings in one moldfoundry process
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