Vacuum Chroming Machine for Home Appliance Plastic Components

Vacuum metallizing, also known as Physical Vapor Deposition (PVD), is a surface treatment process that deposits thin metallic or ceramic films onto plastic substrates under high-vacuum conditions. This technology replaces traditional electroplating by eliminating the need for toxic chemicals and heavy metals, offering superior environmental compliance and material efficiency. For plastic home appliance components—such as control panels, decorative trims, and buttons—vacuum metallizing provides durable, corrosion-resistant coatings with high aesthetic appeal.

Advantages:

  • Environmental Safety: Eliminates hazardous substances like chromium and nickel, complying with RoHS and REACH regulations.
  • Material Versatility: Compatible with ABS, PC, ABS+PC, and other engineering plastics, which are commonly used in appliance manufacturing.
  • Enhanced Durability: The PVD coating forms a dense, adherent layer that resists scratches, abrasion, and chemical degradation.
  • Aesthetic Customization: Supports a wide range of finishes, including metallic (chrome, gold, copper), rainbow-colored interference layers, and matte/glossy textures.
  • Thermal Stability: Withstands temperatures up to 200°C, ensuring compatibility with high-heat appliance environments.

Process Steps

① Pre-Treatment: Ultrasonic cleaning removes surface contaminants, followed by a primer coating to enhance adhesion.
② Base Coat Application: A UV-curable or thermosetting resin is sprayed to create a smooth foundation.
③ Vacuum Deposition:
Thermal Evaporation: Aluminum or other metals are vaporized in a vacuum and condense onto the plastic.
Or, Magnetron Sputtering: For harder coatings like TiN or CrN, ions bombard the target material to eject atoms.
④ Top Coat Application: A protective clear coat is applied to seal the metallic layer.

Applications:

  • Refrigerator Panels: Chrome or stainless-steel finishes for a premium look.
  • Washing Machine Controls: Durable, touch-sensitive coatings resistant to water and detergents.
  • Air Conditioner Grilles: Corrosion-resistant layers for outdoor units.
  • Small Appliance Trims: Microwave ovens, coffee makers, and blenders benefit from lightweight, metallic-looking parts.