Sign indicating number boss is beaten to hollow cylinder block

The utility model discloses a sign indicating number boss is beaten to hollow cylinder block, it is used for printing engine production sequence coding, and the cylinder block is beaten the sign indicating number boss and is included stage body, mesa and cavity. The stage body sets up the skirt section in the cylinder block, the mesa sets up the top surface at the stage body, the cavity sets up the inside at the stage body, wherein stage body and mesa all are higher than the skirt section of cylinder block. The casting problems such as the type is not enough, cold shut of filling that appear can be avoided for hollow like this in the inside that the sign indicating number boss was beaten to the cylinder block in the casting. 本实用新型公开了种中空的气缸体打码凸台，其用于打印发动机生产序列编码，气缸体打码凸台包括台体、台面以及空腔。台体设置在气缸体的裙部；台面设置在台体的顶面；空腔设置在台体的内部；其中台体和台面均高于气缸体的裙部。气缸体打码凸台的内部为中空的，这样能够避免铸造中出现的充型不足、冷隔等铸造问题。