How Cooling Design Prevents Warpage in Injection Molding

Laura Florez explains that warpage in injection-molded parts originates from unbalanced in-mold stresses caused by uneven cooling rates across the mold halves. The article details how differential heat removal shifts the neutral stress axis, causing parts to bend toward the hotter side, and how semi-crystalline materials intensify shrinkage through crystallization. Conformal cooling channels that closely follow the mold wall are presented as a method to achieve homogeneous heat transfer, shorten cycle time, and improve dimensional stability.