In this study, an experimental research was carried out for the production of plastic injection molds with conformal cooling channels by laminated brazing method. In this context, plastic injection mold conformal cooling channels was designed and manufactured. In order to obtain three-dimensional complex cooling channels, mold cores were separated into layers and processed as plates in different thicknesses. These plates were combined with the vacuum brazing method. For the comparison, another mold with a linear cooling channel was produced. Plastic parts were produced by using both molds. In the experimental study, the cooling time, the surface temperature of the product and the distortions in the product were examined. According to the results, it was determined that by using of conformal cooling channels, the cooling time decreased by 22%. It was also observed that there was nearly 50% decrease in the amount of warpage on the produced plastic parts.