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What is PVD Vacuum metalizing?
Basically it is one form of Physical vapor deposition.
PVD uses cathodic arc deposition and a sputtering process to produce high-grade coatings. The results are finishes that are resistant to chemicals, are easy to maintain, can protect against corrosion, and dramatically increase tool life.
In a process known as physical vapor deposition (PVD), a layer of metallic film is applied to a substrate in a vacuum chamber at a low temperature. PVD is a preferred technology because it doesn't require a conductive substrate - the metal film can be applied to plastic, metal, or glass.
How PVD Vacuum metalizing is done?
COATING PROCESS: • Parts are sprayed with a basecoat (becoming obsolete in new technology with highly polished molds using amorphous materials). • Parts are racked, racks put into the chamber, the chamber is then sealed. • Argon gas( or other gas) is introduced into the chamber in a continuously flowing manner. • Electricity creates an active Argon plasma field in front of the cathode. (The cathode is an assembly which contains magnets and provides a mounting for the target - a plate of the material which will be deposited. The magnets are located behind the target.) • The positively charged (ionized) Argon atoms are accelerated by passing through a magnetic field (created by magnets inside the cathode). • The positive atoms are attracted to the negative charged cathode which contains the target. • The target is bombarded with each ion particle, they individually break off ("chip") an atom of the target material with each collision (target hit continuously). • Continuous (and directed) sputteing of tghe release target atoms are "shot" onto the surface of the part (direction is assisted by the magnetic field - perpendicular to the target. • The basecoat material/paint (or high gloss amorphous part) provides a smooth surface for the atoms to be deposited together and build up on the part. • The part is top coated with HMDSO (in monomer form, polymerized by passing through a plasma created by high voltage rods - the polymer condensates onto the coating surface). • The chamber is vented and parts removed/reloaded.
Why PVD Vacuum metalizing?
Dramatic Improvement in Tool Life
Minimal Dimensional Changes
Higher Speeds & Feeds
Protects Against Corrosion
Strip & Recoat Multiple Times
Resistant to Chemicals
High Heat Resistance
Low Coating Temperature for Sensitive Parts
Applications Vacuum metallizing process is used for decorative metallic finishes, EMI/RFI Shielding, and Reflective coatings on plastic, glass, and metal substrates.
Cutting toolings hard film coating-functional coating
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