Laser marking solutions for aluminum profile industry

The aluminum profile industry initially used inkjet printers to print company marks on profile products for anti-counterfeiting treatment, which has the following shortcomings:

1. No permanent mark can be provided.

2. It is easy to block the inkjet head due to the hardening of dust and ink, so it is necessary to clean the pipeline frequently.

3. Consumables are expensive to run.

Laser logo: The company's trademark is sprayed with laser on the profile, and the response is good after being put on the market, which greatly reduces the risk of some small enterprises.

  crafting process:

White wood is extruded from a round ingot, and the white wood is electrophoresed after sandblasting, or the white wood is directly oxidized, and the white wood is directly powder sprayed and then surface treated. There are three types of electrophoretic, oxidized, and powder sprayed materials on the market. Common aluminum profiles.

Generally, laser marking is used on white materials. Five lasers emit light at the same time. The marking time is about 4-5 seconds, and then electrophoresis or oxidation is performed in the subsequent process to form an effect similar to the watermark on RMB, and achieve the purpose of anti-counterfeiting. .

Do not mark directly on the finished electrophoretic or oxidized materials. One is because the surface coating is damaged after the finished product is marked, which affects the corrosion resistance. The other is because the laser marking is in the middle process, and some small factories need to buy laser marking. When the labeling machine counterfeits trademarks, there is a risk that the equipment of the previous and subsequent processes and the laser marking equipment will be confiscated as a counterfeit tool at the same time, which raises the threshold for counterfeiting for South Aluminum.

The powder spray line should be marked with laser. Considering that the powder spray layer is thick, the marking is seriously covered, resulting in unclear marking. Increasing the power mark will seriously affect the service life of the semiconductor. Longer marking time will seriously affect production efficiency. In response to this phenomenon, we have proposed two solutions:

Option 1. It is recommended to mark with YAG after powder spraying.

Because it can be seen under a high magnification microscope that the powder layer is not damaged by semiconductor YAG. This is the photochemical reaction between the YAG wavelength laser and the powder layer, which only changes the color. Therefore, we recommend using semiconductor YAG to print after powder spraying, because the current can be controlled at about 12A (currently the marking current for electrophoretic and oxide materials is about 18A), which can greatly extend the life of the semiconductor module and greatly reduce the maintenance of the equipment. Rate, and the time can be shortened to about 1 second, greatly improving the production cycle.

Option two, it is recommended to mark with CO2 after powder spraying.

Under a high magnification microscope, it can be seen that using CO2 to damage the powder layer is the result of the CO2 wavelength laser burning the powder layer, but because the energy of the laser can be controlled, the depth of damage can be controlled within the profile. Does not affect the range. After pitting corrosion test (simulating natural acid-base corrosion in the laboratory), this conclusion is verified. Therefore, we recommend using CO2 to spray after powder spraying. The damage to the coating can be controlled within an acceptable range by controlling the energy of the laser. Second, the time can be shortened to about 1 second, which greatly improves the production cycle. The three-CO2 imported laser is a fully sealed and maintenance-free product. The air-cooled equipment eliminates the need for a water-cooled machine, which greatly reduces the maintenance rate of the equipment. Fourth, imported CO2 lasers of 30W or even 10W can be used, which greatly reduces the price of equipment.

For marking on electrophoretic materials or oxidized materials, 100W lamp pumps are currently being promoted instead of 50W semiconductors. This solves the problem of the lifetime of semiconductor laser modules in the user's environment, and at the same time meets the requirements of users for clearer marking effects.