Benefits of Vacuum Metalizing
Thermal evaporation involves heating of metals in a vacuum chamber to form desired metal layer. Aluminum is most preferred during vacuum metalizing. Vacuum metalizing has many uses such as EMI coating, vapor barriers, metallic finishes, reflective coating and many others. Metalizing serves as decorative, functional or protective purposes. Resistance heating, plasma heating or electron beam are used to vaporize the coating metal. Vacuum metalizing is used to deposit aluminum on big glass mirrors of reflecting telescopes. When choosing proper vacuum level you have to first eliminate air in the chamber to avoid discolouration that may occur when heating metals at high temperature. For the metal to vaporize you have to set the right temperatures. The distance which metal travels needs to be increased.
Vaccum metalizing is ideal for decorating toys to give them metallic shine. Plastic or metal is used as the base material. The surface is first made smooth without mechanical buffing to give it stunning reflection. The outside part of coated metal is called the front face. This part is usually protected with a transparent vanish because the thin decorative coating is not wear resistant. The part that covers the back of transparent plastic is called second surface coating. The exposed plastic part ensures no damage of the important parts. Aluminum is mostly used because of its conductivity, reflectivity and it is stable in air. Adding color to the topcoat can make different colors of ornaments from red, blue, pink and many others. However other metals such as copper, silver, gold, chromium and cadmium are used. A continuous process is used to metalize large surfaces.
The material is put in a vaccum chamber and coated on either or both sides. It is important to have large volumes of aluminum for evaporation. Recently vacuum metalizing has been broadened to include thick films. The coatings on the thick films are resistant to rust. EMI shielding, RFI shielding, ESD shielding and heat shielding are done through vacuum metalizing. They are cost effective and environmentally friendly compared to other shielding processes. EMI/RFI shielding can be used in different industries like, telecommunication, electronics, medical, military and many other industries. All metalized plastics can be reused. When aluminum coating is put in the vacuum chamber it is immediately oxidized. The electrical sensitivity won’t change after initial exposure.
To ensure plastics and jewelry last for a long time vacuum metalizing is important because of the metallic shine. Onlime marketing has made it possible for vacuum metalizing service providers to advertise their services. Ensure you look at the profile of the company. The capabilities and experience will all be in the company’s profile. The ratings and reviews will assist you to choose genuine vacuum metalizing service providers. Check whether the company is flexible to accommodate your requirements. You can always talk to the service providers and get to know all about vacuum metalizing.