铸型的高紧实率是当代造型机的发展方向,高紧实率及其均匀性可提高铸型强度、刚度、硬度和精度,可减少金属液浇注和凝固时型壁的移动,提高工艺的出品率,降低金属消耗,减少缺陷和废品。高紧实率铸型的获得,可通过真空吸,砂、气流吹砂、气动压实、液动挤压和气冲等工艺手段。由于紧实度提高,铸件的精度、表面粗糙度可提高2~3级,适用于大批量铸 The high compaction rate of the mold is the development direction of the contemporary molding machine. The high compaction rate and its uniformity can improve the strength, rigidity, hardness and precision of the mold, reduce the movement of the mold wall when pouring and solidifying the molten metal, The production rate, reduce metal consumption, reduce defects and waste. Obtain high-compaction mold, through vacuum suction, sand, air blowing sand, pneumatic compaction, hydraulic extrusion and gas-Chong and other technological means. Due to the improvement of compaction, casting accuracy, surface roughness can be increased by 2 to 3, suitable for high-volume casting