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我厂最近鑄造了許多筒形大鑄件,它的尺寸如图1。鑄件毛重約2000公斤,实际鑄出重量是3200公斤。这主要是由于造型尺寸誤差的关系。根据厂內设备情况和鑄造条件,决定采用地坑造型,磚砌泥心。經过实踐証明,用这种方法在設备条件差的情况下,铸造筒形大鑄件的确很解决問題。現將制造过程介紹如下: (一)造型:在地面上挖一个大坑,用刮板造型,造型时在四周型砂里放上Φ20公厘草绳24根,扣箱前將草繩取出,作为排气孔。型砂周围
Our factory recently cast a lot of cylindrical castings, its size shown in Figure 1. Casting gross weight of about 2000 kilograms, the actual cast weight is 3200 kilograms. This is mainly due to the size of the error of the relationship. According to the conditions of the plant equipment and casting conditions, decided to use pit modeling, brick mud heart. Practice has proved that with this method in the case of poor equipment conditions, the casting of large castings really solve the problem. Now the manufacturing process is described as follows: (A) modeling: dig a pit on the ground, with a scraper modeling, modeling in the surrounding sand put on Φ20 mm grass rope 24, buckle the grass rope before removing, as Vent. Around the sand