As many plastic injection molding operations benefit from improved heat transfer performance during the plastic molding operations, it is often a benefit to the user to "build in" improved heat exchanger surfaces immediately surrounding the plastic mold cavity within the die. In dies that are routinely processing thin section plastic parts it is fairly normal to obtain cooling performance enhancements as high as 20X improvements in the part cooling rate when compared to a normal cross drilled mold design. We have worked on making diffusion bonded injection molding dies with 100’s of end users, with very favorable results.