我厂以前铸造如图1的铸件,是用两关箱,中间下坭心,如图2所示,操作很慢,经改用如图3的方法,将木型的上边加一个大坭心头,内浇口也用木模做好钉在坭心头上,这样在造型时,只要拌好下型箱,刮平起出木模后即可;在原来的坭心上再加出一个坭心头,做坭心时并 I cast the castings as shown in Figure 1 before the factory, with two off the box, the middle of the next heart, shown in Figure 2, the operation is very slow, the switch to the method shown in Figure 3, the top of the wooden plus a big heart , The gate is also done with wooden mold nails in the heart, so when the shape, as long as the mixing good under the box, flattening out the wood mold can be; in the original 坭 heart plus a 坭 mind , Do heart and time