一、引言真空密封造型是在干的、没有水份和粘结剂的松散的普通铸造用硅砂的铸型中取得铸件的新的铸造方法。填有松散砂子的砂套是用塑料薄膜密封和空气一扣紧,砂套内吸成真空使砂子紧固,并构成足够的能承受液体金属的强度。作者已完成了利用真空密封造型方法生产铸铁件的深入和基本的研究工作,并确、人和确定了几个基本的标准铸造工艺。二、试验例子1.板状铸件浇注铸件尺寸为350×250×20毫米,利用各种硅砂、塑料薄膜配制成真空密封铸型,在 I. INTRODUCTION VACUUM SEALING is a new casting method for obtaining castings in dry, loose, common cast silica sand molds without water and binder. Sand filled with loose sand is sealed with a plastic film and the air is clasped. The sand is sucked into a vacuum to tighten the sand and is strong enough to withstand the liquid metal. The authors have completed in-depth and basic research work on the production of cast iron using vacuum-tight molding methods and, indeed, have identified several basic standard casting processes. Second, the test example 1. Casting plate casting casting size of 350 × 250 × 20 mm, the use of a variety of silica sand, plastic film formulated vacuum sealed mold, in