It would seem that if the engraving is comining out in the part to be visible in the finished part you should be able to eject the part from the mold. What is the material? Are the molds male or female cavities? Is there any stripper mechanism other than air blow off. What is the starting gauge and the finish gauge?. Is there consistent material distribution. I have seen alot of times where a customer has designed a part, specified a material, specified starting gauge, and could not get an acceptable part from production tooling. The end comment was "There is a problem in the tooling design." B_____". I think you would or should look at your customers competance. Be careful.