Highly precise, but still cost effective – this was the requirement that Kunststofftechnik Krug posed in its search for a new injection molding machine for the production of fan wheels and frames for automotive cooling systems. Thanks to the ENGEL duo, the company has managed to combine both of these properties under one roof. Good experience gained in production led to ENGEL large machines also being installed at the new technology center at the Breidenbach, Germany, headquarters.
Electric vehicle adoption brings new challenges, such as with radiator fans and frames. Where precision molding of these parts to date has been about ensuring high cooling power, there is now a move towards also focusing on smooth running. Any imbalance in the fan wheels causes vibrations that tend to generate noise. In vehicles with combustion engines, these sounds are drowned out by the engine. But in EVs, even quiet fan noise can be perceived as a nuisance.
“The requirements in terms of quiet fan operation have grown significantly,” explained Rüdiger Braun, managing director of Kunststofftechnik Krug GmbH in Breidenbach, Germany. “Repeatability and dimensional accuracy are now among the most important criteria for injection molding machines.”