Solutions to Problems in Colored Laser Marking of Precision Parts

They provide practical solutions to common problems with color printing on precision components, such as uneven coloring, fading, and material compatibility.This includes laser parameter adjustment, material pre-treatment, and equipment maintenance, all of which help the user optimize the marking effect and improve production efficiency.

Why is the color of the printed labels uneven?

The most common cause of uneven coloring is the surface condition of the material, or the laser parameters.For example, if the surface of a metal component is greasy or has an oxidized layer, it will be difficult to produce a consistent reflection rate.

Quickly set up the parameters for the check.

First, you have to confirm that the laser's power and frequency are suitable for the material.For example, stainless steel requires a lower power level in the high frequency range, while aluminum alloy may require even higher energy.If the parameters are fine, try cleaning the surface of the material, and then testing it again.

A few tips for pre-treating ingredients.

Some materials (such as titanium alloys) can be pre-treated with sandblasting or chemical coatings to improve color consistency.Don't be afraid of the trouble, try several different pre-treatment methods and find the most suitable one.

But what about the problem of the ink fading?

The fading of the color of printed markings is usually caused by an unstable oxide layer, and is especially evident in high-temperature and high-moisture environments.

Adjust the laser's "temperature control.

The solution was to lower the speed of the laser, allowing the surface of the material to be heated more evenly.For example, if the copper is too quickly exposed to the air, the oxidation layer will be too thin and the color will easily fall off.

Don't forget to seal the edges.

After firing, the pieces are coated with a clear protective glaze or covered with a low-temperature curing film.This method is particularly effective for outdoor parts, and can extend the life of a color by three times or more.

What kind of marking system should be used for different materials?

The absorption rates for metals and nonmetals are very different, so the same set of parameters can't be used for both.

The metal is gradually worked to the desired shape.

To color stainless steel, the laser is set to a variable power setting, which allows the laser to gradually adjust the power from high to low as it moves across the metal, thus producing the desired range of colors from gold to blue.Remember to always test the dye on a small piece of scrap first, and don't just apply it directly to the finished product.

The secret to preventing burnt food.

When cutting plastic, use dynamic focus to avoid local overheating.If carbonization appears, then the frequency of the pulse can be adjusted to 20,000 hertz or above, and the heat dissipated--even a little fan blowing on the side will do.

That's the key to everyday maintenance.

Many people neglect to maintain their equipment, and the result is that the effect gets worse and worse.

Cleaning the lenses should be like cleaning your mobile phone screen.

Clean your lenses with a lint-free cotton swab and a special cleaning solution once a week.One customer reported that after using the product, the color saturation of his printed labels increased by 30 %.

Don't overwork the laser head.

If you work for more than four hours, remember to take a 15-minute break.Especially in the summer, poor heat dissipation can lead to an offset of the wavelength, which is manifested in a darker color.