Hi There,

I am a design engineer and I have just started to design the plastic parts but before starting it, I have seen some earlier designs and parts with wall thickness 2-3 mm and with a provision of bosses to accomodate the inserts for attaching it to other parts.

But due to design requirements the earlier designs had boss root thickness>1.25 thickness of the material and resulting in sink marks. When I have asked to reduce the boss thickness as this is one of the reasons for the sink mark, they informed me that we cannot reduce the thickness as it is the design requirement.

So, Now I am in search of materials which do not produce any sink mark if the boss thickness>1.25 thickness of material.

It would be great if you can share any.

Thanks,