TECHNOLOGY | LASER WELDING
Right: This automotive swirl control actuator is moulded in several pieces in Pocan PBT from Lanxess and assembled using laser welding
and can be employed to manufacture, for example, housings for mechatronic swirl control actuators.
Below: Domo Chemicals developed its laser transpar- ent Technyl Star AF 219 V30 black LT for laser welding applications
IMAGE: DOMO CHEMICALS
Swirl success Lanxess says a German automotive manufacturer is equipping several of its diesel engine series with these actuators, which are developed and manufactured by Sogefi Air & Cooling in Orbey, France. The company is part of Italy’s Sogefi, which is among the world’s leading providers of filter systems, flexible chassis components and air intake and engine cooling systems for vehicles. Swirl control actuators are part of the air management systems in combustion engines. They are responsible for controlling the air supply to the intake module and, at the same time, ensuring sufficient air turbulence. They help to optimise combustion processes and so play a key role in ensuring that the engine is highly efficient, which is ultimately reflected in high fuel economy and correspondingly low consumption figures. “Our PBT compound has been chosen be- cause it withstands the high temperatures under the hood in a car, even in very humid conditions,” says Jean-Marie Olivé, an application devel- opment expert in the High Performance Materials (HPM) business unit at Lanxess. “Our material is also characterised by its low warpage and high dimensional stability, properties that make it ideal for the complex geometries of these compact housings.” Olivé says that even though the material is pigmented black, it still offers a high level of transparency in
the wavelength range of lasers usually employed for laser transmission welding of plastics. “This ensures stable and efficient welding of the housing components,” he says. In the case of the actuator, the laser-transparent part is
made from Pocan B3233HRLT with
laser-transparent black colouring, while the absorbing housing half is made from
Pocan B3233HR. Last year, Domo Chemicals announced a new
product family of PA66 based black plastics suitable for laser welding. Laser transparent Technyl Star AF 219 V30 black LT is now available on the market. “Being such a concentrated heat source, in thin materials laser welding can be carried out at high welding speeds. Thicker materials can produce narrow, deep welds be- tween square-edged parts. Our Technyl Star AF 219 V30 black LT expanded product family will be important for the electric vehicle market where there is a growing demand for sensor boxes, cases and control units”, says Vincent de Givry, Marketing Director Engineered Materials at Domo. “There is the clear trend in the market to go for
electro friendly, laser welding compatible materials because this clean welding technology is often used in sensitive corrosion applications. That’s why our solutions are also available in electro friendly alternatives, making them suitable for sensitive electrical applications, while offering a cost-effi- cient solution.”
CLICK ON THE LINKS FOR MORE INFORMATION: �
https://af-color.com/ �
https://www.sabic.com/en �
https://lanxess.com/ �
https://www.domochemicals.com/en
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IMAGE: LANXESS
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