金属型在浇注前要下芯、合型、锁紧。这里介绍一种用于手工浇注的金属型锁紧机构,它制造简易,操作方便,尤其适用于有色金属铸造的中、小型金属型。这种锁紧机构由手柄和合型圈两部分构成。图1为手工浇注用金属型。它多为两半型,一侧有铰链连接,另一侧有两个手柄。这两个手柄既是浇注时操作的把手,又是锁紧机构的一部分。锁型时,将图2所示的合型圈的大端朝向手柄,选取合适的套入槽,紧套在两半型的两个手柄上,利 Metal casting before the core, fit, lock. Here is a metal locking mechanism for hand casting, which is easy to manufacture, easy to operate, especially for non-ferrous metal casting medium and small metal type. This locking mechanism by the handle and the ring is composed of two parts. Figure 1 is hand-poured with metal type. It is mostly two halves, with hinged connections on one side and two handles on the other. These two handles are both handles for pouring and part of the locking mechanism. Lock type, the large end of the co-ring shown in Figure 2 towards the handle, select the appropriate set into the slot, tight in the two halves of the two handles, Lee