Verification of the precision of plastic laser welding

Two injection molded plastic parts can be connected by chemical, thermal effects or mechanical techniques. The specific method depends on the later application of the product and the different requirements for visual beauty. However, connecting plastic parts under harsh or sensitive conditions is a huge challenge. For example, for small electronic housings, plastic parts need to be connected together accurately, reliably and stably without chemical, thermal effects or mechanical stress on the surrounding materials.

Laser Plastic Welding TechnologyUnlike other common joining technologies, laser plastic welding is a highly clean, particle-free process. Cleanroom-compatible laser plastic welding systems offer various possibilities for online process monitoring.

Principle of laser plastic welding: The laser beam penetrates the transparent material and reaches the surface of the lower light-absorbing material, converting the laser energy into heat energy and melting its surface. At the same time, the heat is also transferred from the bottom to the contact surface of the upper transparent workpiece, melting it, thus achieving laser heat fusion welding. This is verified by various quality control methods during the welding process. The principle of laser welding clearly shows that compared with other welding technologies, only a narrow area around the weld seam is heated, because only a narrow area around the weld seam is heated. More. Depending on the materials to be welded and the weld strength to be achieved, the width of the weld can range from a few millimeters to 1 millimeter. Depending on the specific application, the laser spot diameter can be adjusted within this range.

Laser welding technology has many unique advantages. For example, if you want to "encapsulate" electronic components, they can only have narrow edges, which will not be affected during the welding and packaging process. In addition, due to the characteristics of the laser welding system itself, the connection technology creates new freedom in product engineering design, physical design and material selection.

Laser plastic welding technology can improve the safety level of electronic products or micro-flow control products. Particle-free production, high cleanliness and high geometric freedom are the prerequisites for product manufacturing. Laser plastic welding technology can guarantee high-quality products. Laser plastic welding technology is not only suitable for the formation of fine geometric channels in micro-flow control products, but also can easily weld the plastic housings of automotive sensors.

The power used in welding depends on the specific application or situation of the welding material. It can be increased from a few watts to a higher power range. For example, welding high-temperature resistant materials requires increased power. For the selection of laser source, semiconductor laser or fiber laser should also be selected according to the specific application.