Why is plastic laser welding considered a clean welding method?

The medical industry and the automotive industry have high requirements for plastic welding. Plastic weldingNeed to be clean and pollution-free to ensure that the welding is firm, thereby improving the quality of plastic products. At present, plastic clean welding methods include infrared welding, hot air welding and laser welding. So why is plastic laser welding called a clean welding method?

The characteristic of the plastic clean welding process is that it does not touch the object during the welding process. This welding method has no mechanical stress residue and has a high welding strength. During the heating process, the two plastic objects have no friction and impact, no debris will be generated, and the internal components and structures will not be damaged, causing damage, which can well guarantee the appearance of the product.

After welding begins, plastic laser welding technology accurately controls the laser beam to reach the energy absorbing plastic layer (lower) through the infrared transmission plastic layer (upper part). The heat-affected zone formed in the contact area of the upper and lower parts welding ribs is very small, and the welding ribs are heated and melted, and collapse and bond under a certain pressure. The entire welding process has no solid wear and no impact on the product, which is a clean welding process.

Plastic laser welding process is most suitable for medical equipment, internal sensitive electronic components and precision parts of the shell connection. The initial investment of the laser welding system is usually high, but considering the entire production chain and ownership costs, the assembly process can save a lot of later costs, and its operation and maintenance costs are significantly lower than other plastic clean welding processes.

The plastic laser welding process has no particles and overflow during the welding process, and the melting position and process can be accurately controlled. Because it is a non-contact heating process, there is no vibration during the welding process and residual stress in the weld.

Plastic laser welding technology is not only a clean plastic welding method, but also a welding process with high welding quality and repeatability. At present, plastic laser welding technology is mainly used for vibration-free welding of precision electronic parts and heat-sensitive materials for shell welding. It is commonly used in the following fields: automotive industry/home appliances and white household appliances/electronic and electrical/pharmaceutical industry, etc.

Plastic laser welding technology has been developed for decades and is not a new technology. However, in recent years, with the decline in the price of laser generators, the reduction in the volume of electronic/electrical components and more stringent appearance requirements, plastic laser welding technology is rapidly being applied to various industries.