采用砂型铸造生产铜合金板类铸件时,在铸件两侧面易出现氧化夹杂或疏松现象,打箱后还常发生弯曲、甚至扭曲情况。对于长小于2 200 mm、宽小于350 mm、厚小于90 mm的板类铸件,采用半金属型铸造法质量更为可靠。根据多年经验,讨论了金属模及铸造工艺的设计要点,并给出了板类铸件在半金属型铸造时的冒口计算、核算方法,避免了经验设计方法的不够准确及凝固模拟技术的繁复费时的问题,既能保证充分补缩,又能获得较高的工艺出品率。 The use of sand casting production of copper alloy plate castings, prone to oxide inclusions or loosening on both sides of the casting, box often bent, or even distorted. For plate castings less than 2 200 mm long, less than 350 mm wide and less than 90 mm thick, semi-metal casting is more reliable. Based on many years of experience, the design points of metal mold and casting process are discussed, and the riser calculation and calculation method of plate castings in semi-metal casting are given, which avoids the inaccurateness of experience design method and the complexity of solidification simulation technology Time-consuming issues, both to ensure full refueling, but also get a higher production rate of technology.