Unique Manufacturing: Extrusion within an ATEX Setting

Equipment used in potentially explosive atmospheres presents unique challenges in process engineering. We provide solutions for gravimetric feeding systems and extruders with ATEX certification.

By adhering to ATEX guidelines, our process engineering equipment is suitable for use in potentially explosive environments. Notably, we recently completed a project for the Fraunhofer Institute for Chemical Technology ICT, achieving ATEX certification.

The client approached us with a specific requirement: the homogeneous incorporation of particulate fillers into a polymer matrix using an extruder. The specified processable viscosities were set at a minimum of 10^6 mPa*. Given the potential for an explosive gas mixture during production, certification according to ATEX zone II 2G Ex h IIB T4 Gb was essential.

To meet these stringent requirements and achieve optimal extrusion results, a ZE 12 HMI co-rotating twin-screw extruder with a 12-millimeter screw diameter was specially designed and produced. The barrel featured liquid temperature control and sensors for monitoring barrel and product temperature, as well as pressure. Complemented by the ZD 9 FB flat-bottom feeder, this system allows precise gravimetric feeding of powdered products with a bulk density ranging from 0.25 to 1.6 kg/dm³ to the extruder. Control of the extruder, including gravimetric feeding, is facilitated through an Ethernet connection to a PC located in a separate control room from the production area.

If you have a unique application requiring a tailored solution, our in-house development and manufacturing capabilities at our Seon AG facility enable us to uphold the highest quality standards and provide maximum flexibility to implement solutions based on your specific requirements. We eagerly await your inquiries.