Hollow air cylinder body code printing boss and casting method thereof

The invention discloses a hollow air cylinder body code printing boss and a casting method thereof. The hollow air cylinder body code printing boss is used for printing an engine production sequence code; and the air cylinder body code printing boss comprises a boss body, a boss surface and a cavity. The boss body is arranged on a skirt part of the air cylinder body; the boss surface is arranged on the top surface of the boss body; the cavity is formed in the boss body; and the boss body and the boss surface are higher than the skirt part of the air cylinder body. The internal part of the aircylinder body code printing boss is hollow, so that the casting problems such as insufficient filling and cold shut during casting can be avoided. 本发明公开了种中空的气缸体打码凸台及其铸造方法，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。