平板类型的零件使用比较广泛,如机床的工作台面和底座,钳工检验用的划线平板,各种盖板和底板等。这类零件形状虽不复杂,但质量要求往往比较高,在考虑铸型工艺和生产操作时,需要仔细周到,否则很容易产生铸 Flat-type parts are widely used, such as the machine table and the base, bench inspection of crossed flat, all kinds of cover and floor. Although the shape of such parts is not complicated, but the quality requirements are often higher, in considering the casting process and production operations, need to be careful, otherwise it is easy to produce cast