在3.2～36.6kgf/cm~2的水压机上研究了履带板和塔形试样铸件的差压法铸型工艺,这是供砂箱尺寸为700×650×200/180毫米的ЛФ—4型自动线用的。所采用的水压机有30个触头,每个触头面积为89.25cm~2,触头行程为250毫米。试验的最大砂箱尺寸为600×500×250毫米,填砂框高115毫米,液压起模机构的起横行程为150毫米。压力机的液压系统经改进后,可用三组独立的触头以10种不同的作用程序对型砂进行压 The differential pressure casting process of track shoes and tower-shaped specimen castings was studied on a hydraulic press at 3.2 to 36.6 kgf / cm ~ 2, which is a type of ЛФ-4 with a sandbox size of 700 × 650 × 200/180 mm Automatic line used. The hydraulic press used has 30 contacts, each contact area of ​​89.25cm ~ 2, the contact stroke of 250 mm. The maximum size of the flask tested was 600 × 500 × 250 mm, the height of the filling frame was 115 mm, and the horizontal stroke of the hydraulic lifting mechanism was 150 mm. Press hydraulic system improved, the available three separate sets of contacts in 10 different procedures for the role of sand pressure