The design of the tapered ribs is very important for filling, directly affecting the flow balance and air trap and welding line. This article uses the thickened size of the lamp to increase the filling balance and different fiber glass content PA6_TECHNYL_C 218_V30 and PA6_TECHNYL_C 218_V50, using the conformal cooling type to cool, different from the traditional cooling type and discuss overflow channel ensures perfect filling into the lamp cavity and get good shrinkage and warpage.