Cooling design in injection molding is not just about reducing cycle time—it defines dimensional stability. Uneven thermal balance leads to uneven shrinkage, internal stress retention, and long-term dimensional drift. This article explains how cooling layout decisions influence structural memory in plastic parts, why process adjustments cannot replace thermal design judgment, and why coordinated heat extraction is critical in applications such as automotive lighting and exterior trim molds. In modern mold manufacturing, stability is a system outcome—not an afterthought.
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