Laser marking is one of the directions of laser applications, and more and more manufacturers have chosen laser marking machines for the marking process due to their unique advantages. Laser marking machines use laser beams to put permanent marks on the surface of various different substances.
Power module marking content including specifications, model, parameters, company LOGO, pin definition, etc.
Power module shell material is mainly divided into:
1, plastic (civilian products, the amount of large and thin, suitable for the shell does not generate heat, more than the use of sticky paper labels and PVC stickers form).
2, aluminium shell oxidation treatment (civilian products).
3, copper spray paint (military products, the number of small profits).
4, copper nickel plating, copper plating nobelium (military products, suitable for shell heat, and special requirements for shielding grounding, etc.. (More screen printing, or heat-resistant plastic stickers).
Problems with paper labels:
1, paper labels are cheap but affect the module heat dissipation, resulting in higher temperatures, paper labels are easy to bulge, deform, and even fall off.
2, Screen printing is more labour-intensive when the volume is large, and when there are many types, the layout changes are not flexible. The copper nickel-plated appearance is not smooth to print.
3, a wide variety of modular power supplies and paper labels in the printing of a small amount of unit price is very expensive.
4, paper labels stored in the warehouse for a long time, easy to warp, backing easy to fail to affect the adhesion.
5, a wide variety of workers' stick paper labels are prone to errors, and labour intensity.
6, a small number of individual varieties, paper label printing costs are high, on the printer to print directly on, like laboratory products, not show class.
Advantages of Laser Marking:
Laser marking technology, as a non-contact modern precision processing method, can be marked on the surface of the power module shell, the workpiece will not produce deformation and internal stress, can get high precision processing quality, and can guarantee the uniformity of processing quality, and improve the anti-counterfeiting ability.
Through the vision system to assist laser marking, the advantages of laser processing can be more comprehensive, not only can solve the problem of marking accuracy, while having high adaptability.
Eliminates the need for fixtures, reduces costs and improves the automation process of the product line. Reduces manual involvement and enhances system efficiency.
Laser marking machine does not produce any chemicals harmful to the human body and environment, compared to paper labels, laser marking is consumable-free, environmentally friendly and safe.
Requirements for Laser Marking:
1, plastic: plastic composition is complex, and the laser marking machine to play effect a great difference, it is recommended that the module manufacturers ask their shell suppliers to change the ratio of plastic composition until hit a clear and beautiful logo. Will not affect the protective role of the shell.
2, aluminium shell oxidation treatment: laser marking machine effect is very good, the newly exposed aluminium gradually oxidation gradually discoloured but still has obvious contrast, especially the black shell, the contrast colour more obvious. Aluminium oxide is more stable and will not affect the protective role of the shell.
3, copper spray paint: laser marking machine can only play off the paint layer to reveal the copper base colour, manufacturers worry that over time the copper will be a green patina affecting the aesthetics, according to the manufacturer's process test effect or no problem.
4, copper nickel plating, copper plating nobelium: plating has a thickness of 7-8U, the requirement to play 4U can be, so as not to damage the coating.
