| 摘要 |
<p>A continuous furnace 4 to which a laser is coupled by conventional optical means that allows the surface treatment of a part, with which it is possible to achieve temperatures of up to 3000°C on said surface whilst the remainder of the part is at a substantially lower temperature. The part in the furnace is heated to a temperature of the order of 500°C and, via an opening 5, a laser-beam bundle is applied to the part, scanning a line perpendicular to the direction of movement of the part such that the entire surface is scanned by means of the mechanical advance of the part. This scanning should extend beyond the lateral ends of the part. This type of laser-beam generator must be made compatible with the various colours with which the surface of the part is decorated. The furnace is divided into different zones, with independent temperature controls, for successfully achieving the desired values, both for heating and for cooling. The system that generates laser radiation and its deflector comprises a radiation generation/emission cavity (CO 2 laser, around 10.6 mm, or diode or Nd lasers in different varieties thereof) and the emitted-beam-handling system, which may consist of a system of galvanometers or a series of combinations of lenses for successfully shaping the beam and applying it in a manner suited to the type of process, material treated and laser used.</p> |
