Unveiling The Secrets Of Metal Coating

The Magic Formula of Metal Coating
Metal coating is like putting a custom rubber coat on metal, combining an elastomer with a substrate through injection molding or calendering. Key steps include:

Surface treatment: Sandblasting or chemical treatment to achieve the ideal surface roughness of the metal.

Preheating: Heating the metal parts to the appropriate temperature improves the fluidity of the adhesive.

Molding control: Precisely controlling injection pressure (typically 80-120MPa) and mold temperature.

Cooling and setting: Gradual cooling avoids internal stress leading to delamination.

Why phone cases love this technology? From drop-proof phone cases to tool handles, metal-coated rubber offers three major advantages that make it stand out:

Enhanced tactile feel: The rubber layer provides a warm, smooth feel, preventing cold hands in winter.

Safety protection: Rubber absorbs over 80% of impact energy upon drop.

Functional integration: Can simultaneously incorporate anti-slip textures and snap-fit ​​structures.

Three common pitfalls for beginners:

Adhesive failure: Choosing a matching type of adhesive (e.g., TPU is suitable for stainless steel).

Air bubble defects: Mold venting design should allow for a 0.02-0.05mm gap.

Dimensional deviation: Calculating the shrinkage rate difference between different materials (metal 0.1% vs. rubber 1.5-3%).