报道:真空密封造型法是铸造行业新的铸造方法,被称为第三代铸造方法,简称V法或负压造型法。其铸造原理是:型砂不在使用粘合剂或硬化剂,而是使用干砂,以塑料薄膜密封砂型,用抽气设备从型砂中抽出空气,借空气的压力差用砂型达到要求的强度。 主要工艺流程:放置模具→吸膜成型→填砂→复被膜→抽真空→合箱→浇注→打箱落砂。填砂, Reported: vacuum seal modeling method is a new foundry casting industry, known as the third generation of casting method, referred to as the V method or negative pressure modeling. The casting principle is: the sand is not the use of adhesives or hardeners, but the use of dry sand, plastic film sealed sand, with suction equipment from the sand out of the air by the air pressure difference with the sand to achieve the required strength. The main process: placing the mold → suction film forming → sand filling → complex coating → vacuum → closed box → pouring → sand boxing. Sand filling,