Extrusion Asia Edition 1-2025

35 EXTRUSION & RECYCLING ASIA 1/2025 PIPE EXTRUSION A t the heart of this advanced line are two Zeus EVO series extruders, engineered to deliver outstanding power and efficiency. The updated screw design improves material ow plasticization, and reduces energy consumption. The new optimized spiral feeding bush ensures a smooth and consistent material feed, minimizing uctuations and enhancing homogeneity, a critical factor for producing large-diameter pipes with uniform wall thickness. Together, the extruders deliver a cumulative output of almost 2,000 kg/h, which enables high- speed, essential for the increasingly demanding market requirements in large-diameter pipe production. Each extruder is equipped with a gravimetric dosing sys - tem featuring three separate components for ultra-precise dosing and weight control. This gravimetric system ensures that material feed and pipe weight are tightly regulated, al - lowing for exceptional meter weight accuracy across each run. The precision dosing plays a critical role in maintaining product consistency, particularly vital in producing large-di - ameter pipes, where wall uniformity is key to meeting qual - ity and performance standards. Venus 1600 Die-Head: Advanced Centring for Wall Thickness Consistency The Tecnomatic line includes the re-designed Venus 1600 dou - ble-spiral die-head, which is cen - tral to producing large-diameter pipes with uniform wall thickness. The Venus 1600 is engineered speci cally for pipes of this cali - bre and integrates innovative mechanical and thermal centring solutions, ensuring optimal thick - ness uniformity even with very high wall dimensions. The double-spiral design of the Venus 1600 promotes even material ow, reducing the risk of thickness inconsistencies often associated with large pipe diameters. The centring sys - tem provides a two-fold approach: mechanical adjustments align the die-head for correct positioning, while thermal con - trol ensures temperature stability within the die. This combi - nation allows for precise, on-the- y adjustments to maintain pipe centring and thickness uniformity under varying produc - tion conditions. Achieving high output for large-diameter pipes requires an exceptional cooling and vacuum system, which Tecnomatic has addressed with a vacuum length of over 20 meters. This extended vacuum zone provides rapid and e ective cooling,