Routine Equipment Maintenance: Screw Cleaning Of 50D Twin Screw Extruder For PC Scrap Reprocessing

Our workshop crew recently carried out routine upkeep on one of our 50D co-rotating twin screw pelletizers. Built with a 44:1 L/D screw setup, this unit routinely turns surplus PC offcuts into finished plastic pellets. Following months of non-stop production, hardened material build-up collected within the extruder head and screw flights, so our technicians pulled out the full screw set to carry out thorough deep cleaning.

When PC leftover materials go through repeated melting and extrusion, tiny fragments easily leave residue inside equipment. The 44:1 extended screw structure contains multiple processing sections, making it easier for leftover material to build up over time. Uncleaned buildup would lead to unstable extrusion output and irregular finished pellets, so scheduled disassembly and cleaning is essential to keep consistent machine performance.

From on-site photos, thick hardened residue was found inside the extruder head. After removing the screws from the barrel, our technicians used targeted flame heating to soften solid deposits, then wiped away leftover waste with steel cleaning brushes. Once cleaning, reassembly and temperature calibration are completed, the machine will go back into normal production for PC scrap recycling.

Besides custom-made new extrusion machinery, we also provide full after-sales support including regular equipment maintenance, screw renovation and production process adjustment. We tailor personalized maintenance schedules for manufacturers handling different kinds of plastic scraps to sustain steady equipment working efficiency and product quality