Laser Welding Principles:
Laser welding of transparent plastics utilizes the high energy density and precise control of laser beams to achieve non-contact heating and melting of the material, enabling effective welding. For transparent medical materials, lasers with wavelengths of 1710nm or 1940nm are typically chosen for their high absorption rates, ensuring optimal welding quality.
Importance of Water Chiller Configuration:
During laser welding of transparent plastics, excessive welding temperatures can cause localized overheating, leading to issues like bubbles, scorching, or discoloration, all of which significantly impair the plastic's transparency and optical characteristics. If the temperature is too high, the plastic may undergo thermal decomposition, releasing gases and volatile substances that further degrade weld quality and material performance. Therefore, using a water chiller is crucial.
A water chiller dissipates the heat generated by the laser through a refrigeration cycle in the compressor system, ultimately releasing it into the air. Control devices can precisely manage the chiller's operation according to set parameters, ensuring that the cooling water temperature for the laser generator remains within the optimal range.
Source: https://www.teyuchiller.com/principles-of-laser-welding-transparent-plastics-and-water-chiller-configuration