Engineer inspecting an overmolded soft-grip tool handle under bright workshop lighting
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What Is Overmolding in Injection Molding? Materials, Cost, and Bond Strength Explained

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Overmolding fuses a soft TPE or TPU layer onto a rigid plastic substrate for grip, sealing, or two-tone finish. This guide covers what actually determines success: resin bonding compatibility, the 2-shot vs. pick-and-place cost crossover, and precision shut-off design to prevent flash or crushing.