Published 07/11/2025 at 1182 × 802 in Recent Advancement in Conformal cooling channels: A review on Design, simulation, and future trends Fig. 4 Sample and creation mechanism of (a) sink mark and, (b) warpage defects in moulded parts. Fig. 4 Sample and creation mechanism of (a) sink mark and, (b) warpage defects in moulded parts.