Laser marking machine as one of the directions of laser application, because of its unique advantages, more and more manufacturers have chosen laser marking machine to marking processing. Laser marking machine is to use a laser beam to make permanent marks on the surface of various different substances.
Power module marking content includes specification model, parameter description, company LOGO, pin definition and so on.
Power module shell material is mainly divided into:
- Plastic (folk products, the amount of large and thin, suitable for the shell does not heat, more paste paper labels and PVC stickers form).
- Aluminum shell oxidation treatment (civilian products).
- Copper spray paint (military products, small amount of profit).
- Copper nickel-plated, copper-plated nobelium (military products, suitable for shell heat, and special requirements for shielding grounding. (More screen printing, or heat-resistant plastic stickers).
Problems with paper labels
- Paper labels are cheap but affects the module heat dissipation, resulting in higher temperatures, paper labels are easy to bulge, deformation, or even fall off.
- Screen printing volume is more labor-intensive, a wide range of types, version of the change is not flexible. Copper nickel-plated smooth appearance is not good for printing.
- Avariety of modular power supply, paper labels in the printing volume is very expensive.
- Paper labels stored in the warehouse for a long time, easy to buckle, the adhesive backing is easy to fail to affect the viscosity.
- A wide variety of workers to stick paper labels easy to make mistakes, labor-intensive.
- Individual varieties of small quantities, paper label printing costs are high, the printer is used to print directly affixed, like a laboratory product, does not show the grade.
Advantages of laser marking machine
Laser marking technology as a non-contact modern precision processing methods, can be marked on the surface of the power module shell, the workpiece will not produce deformation and internal stress, you can get high precision processing quality, and can be a guarantee of the uniformity of the quality of the processing, and improve the anti-counterfeiting ability.
Through the vision system to assist the laser marking, can make the advantages of laser processing to get more comprehensive play, not only can solve the problem of marking accuracy, at the same time has a high adaptability.
Eliminating the need for fixtures reduces costs and improves the automated process of the product line. Reduces labor involvement and improves system efficiency.
The laser marking machine does not produce any chemical substances that are harmful to the human body and the environment, relative to paper labels, laser marking is non-consumable, environmentally friendly and safe.
Laser marking requirements
- Plastic: plastic composition is complex, laser marking machine to play the effect of the big difference, it is recommended that the module manufacturers go to ask their shell suppliers to change the composition of the plastic distribution ratio, until a clear and exquisite marking so far. Will not affect the protective effect of the shell.
- Aluminum shell oxidation treatment: laser marking machine effect is very good, the new exposure of the aluminum gradually oxidation gradually discoloration but there is still a clear contrast, especially the black shell, contrast color is more obvious. Aluminum oxide is more stable and does not affect the protective effect of the shell.
- Copper spray paint: laser marking machine can only paint layer can only be knocked off to reveal the copper base color, manufacturers are concerned about the long time the copper will be green patina affect the aesthetic, according to the manufacturers of the process test effect is still no problem.
- Copper nickel plating, copper nobelium plating: plating layer has a thickness of 7-8U, the requirement to play 4U can be, so as not to damage the coating.
