Technical Principle
Material requirements:
The two components that need to be welded must be made of materials with different laser penetrability. The upper components need to allow laser transmission (usually uncolored transparent or semi transparent plastics such as PC, PMMA), while the lower components need to absorb laser and generate heat (usually black or dark colored plastics, or materials with added absorbers).
Precise heating:
The near-infrared laser beam penetrates the upper components, and the energy is accurately captured and converted into thermal energy by the absorption layer of the lower components.
Melting and bonding:
Heat is rapidly conducted to the contact interface between the upper and lower components, causing the interface area to melt simultaneously.
Pressure molding: Under the pressure of precision fixtures, molten plastic molecules diffuse and fuse with each other, forming a strong, sealed, and aesthetically pleasing weld after cooling.
Advantages and Features
1、 No particle generation:
An absolutely clean welding process that avoids internal contamination and meets the stringent requirements of medical and optical devices.
2、 Extremely low internal stress:
avoids internal damage and stress cracking of components, protects built-in precision electronic components (such as sensors and chips)
3、 Accurate energy delivery:
Heat is only generated at the welding interface, with minimal thermal impact on the surrounding area and no damage to the product surface.
4、 Adapt to complex contours:
By using a galvanometer or robot control, two-dimensional and three-dimensional curve welding can be easily completed, with much greater flexibility than traditional methods.
5、 No consumables required:
The process does not require adhesives, solvents, or other auxiliary materials, saving costs and being environmentally friendly
