（图片仅供参考）
激光传输焊接 热塑 parts by passing a laser beam through a laser-transmissive upper part to a laser-absorbent lower part. The absorbed laser energy heats and melts the interface. Clamping 压力 fuses the molten layers, and upon cooling, a strong, clean weld is formed. This 方法 is precise, non-contact, and creates minimal thermal 压力 或微粒污染。
This technique relies on the different optical properties of the two plastics being joined. The upper layer must be transparent or translucent to the specific laser wavelength (e.g., near-infrared from a diode or Nd:YAG laser), while the lower layer must contain an absorbent additive, often carbon black or specialized dyes, to convert light energy into heat. The process is highly controllable, allowing for precise weld paths defined by the laser’s movement via robotics or scanner optics. The clamping force is critical to ensure good thermal contact and to forge the weld as the interface melts. This method produces aesthetically pleasing welds with no flash or particulate generation, making it ideal for medical and electronic applications where cleanliness is paramount.
存在不同的焊接方法，例如轮廓焊接（跟踪路径）、准同步焊接（快速多次扫描路径）和同步焊接（使用多束光束或掩模），这些方法在速度、灵活性和设备成本之间进行了权衡。焊接的成功取决于材料兼容性、吸收添加剂的浓度、激光功率、焊接速度和夹紧压力。
塑料的激光透射焊接
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