For deep boxes, the gate may be positioned
at the center line (See Figure 11). If walls
are thinner than 0.040 in (1.0mm) or very
large parts are to be molded with relatively
tight tolerances underpacking on the nongated
cavity may be unacceptable due to
the inevitable pressure drop across the
hinge restriction. In this case, both cavities
may need to be gated. In order to prevent
the formation of a weldline along the hinge,
the following approaches may be
considered: