Thanks for pict. It is not very clear from images, what is going on. It can be also wall thickness issue or pressure marks. Do you have it also on short shots?
thank you for your reply
there is no sink mark on the product, it is just like a white line around the product in the middle
I thought that it is from the changing of flow direction inside the product( pic 2) so I am thinking to make it done more smoothly.
that do you think?