我们在生产中经常会遇到一些本来形状不复杂,但由于其某部位过于凸出,而结果往往给其造型工艺带来较为麻烦的铸件,如图1所示的蒸汽机车炉床部位的齿形炉篦,就是属于典型的这类铸件。由于它有一个较高的凸出部位,在生产中如采用箱式造型必然需要一个较高的底箱,这样不但会给手工造型的翻箱带来困难,而 We often encounter in production, some have not complicated shape, but because of its part is too protruding, and the result is often to its modeling process more troublesome castings, as shown in Figure 1 steam locomotive hearth parts of the tooth Shape grate, is a typical type of castings. Because it has a high protruding parts, such as the use of box-shaped production in the production will inevitably require a higher end of the box, so not only to the hand-made modeling of the box to bring difficulties, and