Method of producing bracket and gear box of electric motor with gear box and metal mold used with the same

摘要

A first movable mold with both a runner and a core type mold is moved toward a stationary mold, and simultaneously a second movable mold supporting a motor bracket of plate metal is moved toward the stationary and first movable mold until all the molds engage one other to form around the core type mold a predetermined space to which the bracket is exposed a molten resin is poured into the space through the runner to mold a gear box integral with the bracket.