Laser welding of plastics is already an extremely economical joining process in its usual form. It has been steadily gaining in importance for years and is used today in almost all industries. The experts of the Evosys team are constantly tinkering to further improve the reliability and efficiency of laser welding. With the new, patented AQW process, this has now been achieved for selected plastics.

Numerous test series have shown that welding times can be significantly reduced in some cases. The process makes use of the absorption properties of the plastics and combines two different wavelengths that are alternately guided over the welding zone in a controllable pattern. Experience with advanced quasi-simultaneous welding shows an improvement in process time compared to the standard process with only one laser source. The new process can be applied to materials such as PC, but other common plastics are also conceivable in the future.

Parallel to the patent granting process, the necessary system technology for the AQW process was developed and optimized for series use. “Our customers can test the process extensively in our technical center at any time and use it later for their series production,” explains Frank Brunnecker, managing partner of Evosys Laser.

Read the full article in the October/November 2021 issue of PhotonicsViews: Lea Sauerwein, Christian Ebenhöh, and René Geiger (Evosys Laser): Evosys’ advanced quasi-simultaneous welding – A new approach to the joining of polymers, PhotonicsViews 18(5), 34 – 37; DOI: 10.1002/phvs.202100057