造型工艺不同,铸型所(?)得平均紧实度、铸型表层紧实度是不一样的。随着砂箱高度增加,砂箱内尺寸减少,便更为显著。例如采用震击加压,其平均紧实度比单纯压实为高。当砂箱高度高,内尺寸相对少,不管采用上压或下压工艺,都会 Different molding process, the mold (?) Have an average compaction, mold surface compaction is not the same. As the height of the flask increases, the size of the flask decreases and becomes even more pronounced. For example, using shock compression, the average compaction than simple compaction is high. When the sand box height is high, the relatively small size, regardless of the use of pressure or pressure on the process, will