1) Optics is critical to any BMC reflector mold, which need high precision machining.
2) The sand holes on the optical surface which may be caused by air traps should be solved.
3)The heaters should be equally distributed in the mold for uniform temperature.
A simple, reliable and balanced ejection system is required for light guide molds. The hot runner system is HRS, mold steel is 1.2343ESR/1.2344ESR with heat treatment, standard part is Hasco.