This research delves into challenges within injection molding, particularly the struggle to maintain uniform cooling in complex product shapes. Additive manufacturing, like conformal cooling, is explored as a potential solution but faces surface quality issues. The study investigates Abrasive Flow Machining (AFM) as a means to refine surfaces within cooling channels, crucial for injection molds. The research presents the design and assembly of an AFM-based machine and its potential in addressing the requirements for machining internal surfaces created through additive technologies, highlighting its universality and potential applications in future research on conformal cooling within injection molding technology.