How Metal Insert Design Affects the Appearance of Foam EV Armrests

Insert Location Controls Local Foam Thickness

Inserts positioned too close to the surface create thin foam zones that may show hard spots, color differences or visible outlines. Uniform cover is important for flow and skin formation.

Treat Welds and Sharp Edges

Raised welds, burrs and sharp edges can affect positioning and approach the finished surface under foam pressure. Dimensions, distortion and cleanliness should be checked before molding.

Locating Features Must Support Repeat Loading

Production operators need fast and stable insert placement. Tool trials should verify both loading efficiency and positional repeatability.