I am having a problem with a mold I have had for a while. It was designed as a one piece mold but my brother is a machinist and I decided to see if he could make it a two piece by adding a plate to it therefore making it a two piece. The problem is that the bait is getting voids in it.
he added vents on the tails and the baits has a vold from the sprue to about 1" down the body in the center of the body.
I figured air was being trapped so I drilled a hole in the top half and repoured now I have two voids, one where it was originally and another right behind the hole I drilled. I dont want to keep experimenting and drilling holes in it and was wandering if someone could possibly shed some light on what may be happening. My first suspicion is the sprue isn't deep enough but that's just a guess. Thanks in Advance. Attached are some pics.