Three Process Techniques for Fiber Laser Marking Machines Applied on Glass
Glass is an amorphous solid. Molten glass cools rapidly, and its molecules fail to form crystals because they don’t have enough time to do so, resulting in glass. Meanwhile, fiber laser marking machines offer three distinct process techniques when applied to glass.
Multiple laser irradiation method: A clearly visible mark is first created on the glass surface using a single laser pulse. Over the next few days, the laser energy spreads beyond the original mark, causing micro-fractures in the surrounding area. By applying multiple pulses, the regions adjacent to the marked area are gently heated via thermal conduction, significantly reducing the likelihood of secondary cracking. This approach proves highly effective for marking both soda-lime glass and borosilicate glass. Meanwhile, a single laser pulse is particularly efficient for creating marks on fused silica glass and quartz glass, thanks to the extremely low thermal expansion coefficients of these materials.
The Discrete-Point Ring-Crack Method: This technique uses a series of ring-shaped cracks to create text, barcodes, square or rectangular codes, and other shaped code patterns. CO2 laser marking machines are commonly employed for this method; however, when using a CO2 laser marker set to parameters optimized for marking on glass, fewer cracks typically form. Instead, discrete points emerge, giving rise to the characteristic ring-like crack pattern. The process involves heating and cooling cycles in the glass, which induce low-density, ring-shaped cracks. As the glass heats up, it expands and exerts pressure on the surrounding material. Once the temperature reaches the glass's softening point, the rapid expansion causes the formation of a dome-shaped protrusion on the glass surface—creating a region of lower-density material.
The crack-pattern surface-creation method: By employing a process of heating and cooling, the surface of the glass under treatment undergoes transformation. This effect isn’t immediately visible—it only becomes apparent after slight pressure is applied, triggering the formation of grid-like cracks along the laser-marked area. This technique enables clear, high-quality markings to be printed on premium automotive glass, with the critical requirement that the surface remain perfectly pristine.
The 21st century is the age of fiber optics, and lasers, as one of the era's most powerful tools, boast unparalleled advantages across numerous industries. With advancements in technology and the growing popularity of its applications, fiber laser marking machines have quietly become integrated into every aspect of our daily lives. As consumers become increasingly aware of product counterfeiting, traditional ink-jet labeling methods can no longer earn their trust. Instead, laser marking—capable of producing intricate patterns that convey vital information such as batch numbers, production dates, and brand logos—has gained widespread acclaim. Even the glass industry is keeping pace, with beer bottles, cosmetic containers, beverage bottles, and other glass products now commonly marked using laser technology. This trend has prompted many glass manufacturers to invest heavily in laser marking systems for precise and durable product identification. Clearly, the adoption of fiber laser marking machines has spurred remarkable growth in the market, symbolizing a significant leap forward in technological progress and societal advancement.
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