Laser transmission welding is maturing in the mass production of complex shaped plastic parts for the automotive, electrical/electronic, IT and consumer goods industries.
To better serve laser transmission welding, LANXESS is committed to developing its laser-transmissive polyamide 6 and polyamide 66 and PBT compound (polybutylene terephthalate) product lines to achieve this forward-looking technology.
“These new products focus on the growing market demand for sensors, control units and display system enclosures, such as the electrification of vehicle drives, applications in driver assistance systems and autonomous driving,” LANXESS High Performance Materials (HPM) business Frank Krause, a welding technology expert in the department, explained. All new compounds have high transmission properties for light in the near-infrared range, which is commonly used for laser transmission welding.
Automated, gentle, flexible, no need for lint welding
During operation, the laser beam is transmitted through the laser transparent component and absorbed by the second black component below. The generated heat melts the surface of the second component, and the surface of the first component is also melted by heat conduction, thereby forming a material weld between the two components.
This welding technique has several advantages:
(1) It requires less thermal stress and mechanical stress than vibration, ultrasonic and infrared welding, and is easy to automate.
(2) It is possible to perform 3D contour welding and hard/soft material combination welding.
(3) Depending on the size of the part, the cycle time is much less than 30 seconds, and the welding flash (if any) is absolutely extremely low.
(4) No need for lint in the weld. This means that the welded liquid container does not have to be cleaned after production.