If you want to have fast and quick results just to be able to compare injection mold alternatives you can take a look at Plastic Advisor. This is a MoldFlow product that is also delivered with the mould module of PTC. You must be very careful to use the results to determine whether the mould will fill or not on a particular machine with specific machine settings. There are phenomena like e.g. shear rate heating which are not completely taken into account.
If you want to have a more in depth analysis you can take a look at MoldFlow MPI or Moldex 3D. I have used both with good results. The price tag of these two packages is a lot higher than that of Plastic Advisor.
Custom plastic injection molding in China is especially effective when the plastics require secondary operations for completion. These secondary operations include anything from cleaning parts, overmolding, painting, drilling holes, pad printing, screen-printing, or partial sub-assemblies. In China we are able to take advantage of our lower labor rates to greatly reduce the costs for our customers. We are able to utilize high-end second-op machining and balancing machines when needed for plastic injection molding parts where tolerances can not be met during molding operations. Follow us on Facebook.