Principles of laser plastic welding

Principles of laser plastic welding

Laser plastic welding, also known as laser light transmittance, requires high light transmission rate of upper plastic workpieces, and the lower workpiece can absorb laser energy. Therefore, the current mainstream welding objects are "transparent plastic+black plastic" and "transparent plastic+transparent plastic". The combination method.

Because most of the transparent plastics have high light transmission on the 800nm ~ 1100Nm band, and the absorption of small absorption is small, based on this NAFOMAC launched a 980Nm semiconductor laser, which integrates a high -precision control system in the compact structure, which is convenient to use. It uses advanced semiconductor laser technology to output near -infrared laser with a wavelength of 980nm. The laser energy of this wavelength can penetrate transparent or translucent plastic surfaces, absorbed and transformed into thermal energy by the lower layer, and can be used to implement precise and efficient plastic welding. This laser has high electro -light conversion efficiency, providing continuous laser output, and the power level can be selected according to the needs of the welding process. The range can be adjusted from hundreds of tiles to hundreds of watts. Essence

In addition to the laser body, the actual application of laser plastic welding also needs to be paired with welding ting and welded fixture. When using a 980Nm semiconductor laser for plastic welding, first assemble the two parts to be welded with a fixture. The basic principle of welding is that the laser beam with the output of the welding head is transparent through the upper layer. The welding area to be welded; the lower plastic melted after absorbing the highly focused laser energy, and the upper and lower layers of plastic parts were fully melted and combined. With a certain external force, the weld was formed after cooling, and the final welding was completed to complete the final welding. Essence

At the same time, with the help of a dedicated control system, accurate heat control and local heating in the process of transmitting welding can be achieved, the welding quality can be consistent, avoid adverse effects on the surrounding materials. Welding of precision plastic parts.