Łukasz Majewski, a member of the Polish team of NEWEX project, was a representative of inventors, who developed within secondments a new constructional solution of the extruder, at iENA 2017 International Trade Fair „Ideas – Inventions – New products”. The invention entitled „Extruder” was submitted to the Polish Patent Office as patent application P. 422114. The invention presents an extruder with a unique construction, which allows to change the length of barrel and screw during the extrusion process. The extruder is designed primarily for extrusion thermoplastic polymers, but also nanocomposites or cosmetic and food products. There are many known constructional solutions which allow to control the intensity and time of polymer plasticization, but the presented invention is the first one in the world that allows to modify the length of the plasticizing system while machine is in operation. International Trade Fair took place in Nürnberg, Germany. International Jury appreciated the invention and awarded it with a gold medal. Congratulations to the inventors!