Abandons conventional melt conveying theory, employing a "solid plug" conveying principle. The screw does not aim to fully melt the material but rather pushes the partially plastified UHMWPE billet out of the die under high pressure, akin to "squeezing toothpaste." The equipment core is a heavy-duty gearbox and thrust bearing capable of generating enormous axial thrust. Overall machine rigidity requirements are extreme to withstand massive back pressure. Process temperature control is very strict; too high causes degradation, too low prevents forming.
Screw material is a good wear-resistant alloy with extremely smooth flight surfaces to reduce friction. Barrel is lined with ultra-wear-resistant bimetallic material. A heavy-duty gearbox with a large reduction ratio is used, with the output shaft equipped with multi-row cylindrical roller bearings and thrust bearings in series. The heating system is finely zoned with high sensitivity control. The matching die has short and gentle flow channels made of wear-resistant hard alloy. Downstream requires a high-power, non-slip caterpillar haul-off.
Specifically used for producing UHMWPE products, which is nearly its sole purpose. Main products include: high-wear-resistant sheets (for hopper/chute liners), rods (for mechanical wear parts), pipes (for slurry/powder conveying), fibers (precursors for high-strength fibers, ballistic fibers), and profiles. These products are widely used in mining machinery, textile machinery, food machinery, medical implants, and military fields.
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