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PVD (Physical Vapor Deposition) and CVD (Chemical Vapor Deposition) are two major thin-film coating technologies. PVD vaporizes materials through physical means (e.g., heating or sputtering), resulting in strong adhesion but slower deposition rates. CVD forms coatings via chemical reactions, off
As a new polishing process, plasma polishing is a trend in stainless steel polishing. If we can make good use of plasma polishing will save us a lot of time and costs.
PVD and CVD are the most commonly used surface treatment methods for tools and moulds, CVD is based on chemical vapour deposition and PVD is based on physical vapour deposition, as they differ in principle, the final coating results are different and each has its own focus in application.
Electrolytic polishing has great advantages over traditional polishing, low cost, small footprint, can polish complex workpieces, has unmatched advantages over traditional polishing.
PVD stands for Physical Vapour Deposition. PVD coating refers to a thin film deposition technique whereby solid materials are sputtered or evaporated in a vacuum environment and deposited as pure materials or alloy components to form a coating on a substrate.
Views: 43 Author: Site Editor Publish Time: 2022-10-10 Origin: Site
Sandblasting is the use of compressed air as the power to form a high-speed jet beam, the abrasive high-speed jet to the surface of the workpiece to be treated, so that the external surface of the workpiece physical changes to meet the quality requirements.
I . Characteristics of sandblasting.
1. Sandblasting is the most thorough, versatile, rapid and efficient cleaning method.
2, sandblasting treatment can be in different roughness between any choice, while other processes are no way to achieve this, manual sanding can hit the hairy surface but the speed is too slow, chemical solvent cleaning is too smooth surface cleaning is not conducive to coating bonding.
II . Role of sandblasting.
Metal workpiece, non-metal workpiece surface cleaning, surface strengthening, surface beautification.
1. Surface pre-treatment processing: electroplating, painting, PU, rubber and plastic coating, metal spray welding, titanium plating and other pre-treatment and increase the adhesion of the surface.
2. Surface beautification processing: various metal products of decorative processing and electroplating products of matte and soft matte treatment and non-metallic products such as: acrylic, Polly, crystal glass and other surface atomization treatment.
3. Surface cleaning process: metal oxide layer or black skin after heat treatment, surface pores, metal or non-metal surface dirt and rust elimination, ceramic surface black and coloring spot removal or color painting regeneration, rubber mold and gravity die-casting mold oxide, residue or release agent removal.
4. Surface burr removal process: plastic, Bakelite products, zinc and aluminum die-casting products, etc. burr removal and electronic or other parts of the surface trimming treatment.
5. Electronic parts processing: silicon chip diffusion surface impurity removal operations, silicon chip sandblasting cut into small round grain etching processing operations, electronic parts packaging industry overflow glue burr spray removal, electronic parts finished surface printing removal, ceramic electric material cleaning.
6. Surface etching process: precious metal jewelry, precious stones, glass, stone, stone seals, ceramics, wood and other surface finishing etching treatment.
7. Workpiece stress relief processing: aerospace industry parts of parts cleaning and stress relief or defense weapons refurbishment and matting rust and paint removal.
8. Wold processing: mold surface pear processing (sandblasting) mold nibble and matte treatment, increase the adhesion of the mold covered with PU, shoe mold, conductive rubber mold, tyre mold and electronic product mold cleaning and matte treatment.
III . Shot blasting sand blasting difference
Shot blasting and sandblasting are both using high pressure wind or compressed air for power, which will be blown out at high speed to impact the surface of the workpiece to achieve the cleaning effect, but the choice of media is different, the effect is not the same.
1. After sandblasting, the surface dirt of the workpiece is removed, the surface of the workpiece is slightly damaged and the surface area increases significantly, thus increasing the bonding strength of the workpiece and the coating/plating layer.
After sandblasting, the surface of the workpiece is metallic, but as the surface is rough, light is refracted away, so there is no metallic lustre and the surface is dark.
2. After blasting, the surface dirt is removed from the workpiece and the workpiece surface is not easily damaged and the surface area increases. Due to the processing process, the surface of the workpiece is not destroyed, the excess energy generated during processing will trigger the surface strengthening of the workpiece substrate.
The surface of the blasted workpiece is also metallic in colour, but as the surface is spherical, the light is partially refracted away, so the workpiece is machined to a matt finish.
