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Atomic ash coating techniques that sheet metal workers must master


 Sheet metal atomic ash industry twisted alloy atomic ash is a multi-purpose polyester atomic ash, equipped with BPO curing agent, which has fast air drying, fine ash body, less sand holes, good temperature resistance, excellent scratch resistance, and good adhesion on various metal surfaces (excluding anodized aluminum oxide surfaces). It does not leave gray holes during construction, is easy to scratch, does not shrink after drying, has good compactness after polishing, strong water resistance, and good high and low temperature crack resistance.

 
 
 
The application of atomic ash on sheet metal needs to be carried out in sequence: grinding off old coating film and rust, making feathered edges, cleaning and degreasing, spraying primer, stirring atomic ash, applying atomic ash, drying, and grinding atomic ash surface.
 
 
 
Tool for removing old coating and rust: single action grinder, 60 grit sandpaper
 
 
 
Make a feather shape
 
 
 
The purpose of this step is to prevent obvious linear traces of atomic ash after polishing. Making feathered edges can cause foggy atomic ash marks to appear on the polished surface, facilitating the next spraying operation and avoiding obvious pits after application.
 
 
 
Tool: Double action grinder, 120 grit sandpaper,
 
 
 
When grinding, pay attention to raising one side of the grinder by about 10mm and moving it gently along the edge
 
 
 
Cleaning and degreasing
 
 
 
Spraying primer can be done using a brush or spray gun.
 
 
 
Stir atomic ash
 
 
 
Mix the atomic ash and hardener evenly, take out the required amount of atomic ash and the correct proportion of hardener, and finally use a scraper to stir the atomic ash and hardener at the corners.
 
 
 
The method of stirring atomic ash and hardener at the edges and corners of the scraper When applying atomic ash, the standing position must be able to easily apply to the farthest damage area without excessive stretching of the arm. Fill small depressions with a thin coating to avoid porosity and enhance adhesion;
 
 
 
Adding atomic ash causes the atomic ash surface to be higher than the old coating film without generating bubbles. The next time atomic gray is applied, the application range should cover at least one-third of the previous application range.
 
 
 
Finally, move the scraper in the opposite direction to scrape the edge of atomic gray and level it.
 
 
 
Dry at room temperature as required, or use Far infrared drying lamp to force drying. To grind the atomic ash surface, the first step is to determine whether the atomic ash has dried, that is, to check whether the ground atomic ash is easy to brush off. Note: If the thin area of atomic ash application has dried, it indicates that the entire atomic ash application area has completely dried. There are also two ways to grind according to needs, one is to use a circular track grinder for grinding, and the other is to use a hand grinding pad for grinding. Circular track grinder grinding tool: Circular track grinder, approximately 80 grit sandpaper
 
 
 
Hand grinding pad grinding tool: Grind the pad with approximately 120 grit sandpaper to a certain extent, and use an air gun to blow off the ground powder to check for pinholes on the atomic ash surface. Finally, replace the sandpaper with 240 sandpaper and polish the sandpaper marks.


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