If you're using a laminate plate temp isn't as critical as when using a twinjector. The usual cause of what you're showing in the pics is the first half lifting when the second half is shot. When you cut the sprue off the first half, cut the nose of the bait at 45 degrees (angling back from the bottom (round side) towards the top (flat side). This creates a "ramp" for the second half of the plastic to flow up and on top of the first half (while sort of pushing down on the leading edge of the first half). Also, your second shot should be slow and steady to help prevent lifting (even with the cut I described).