In the field of nylon compounding, have you encountered these challenges with your twin-screw extruder?
1. Poor mixing or dispersion leading to unstable product quality?
2. Excessive shear and material yellowing?
3. Low throughput under high filler loading?
The root of these issues does not depend solely on the process but is also closely related to the equipment’s core components — namely, the screw elements, shafts, and barrels of your twin-screw extruder.
Lesun’s main products: screw elements, shafts, and barrels.
More Uniform Mixing
Nylon modification demands extremely high requirements for dispersion and distributive mixing. Lesun’s specially engineered screw elements optimize distributive and dispersive mixing, minimize shear degradation, and improve the mechanical properties and appearance consistency of the final product.
More Stable Processing
The precision and consistency of screw elements, barrels, and shafts directly affect melt conveying and product quality. Even tiny deviations can impact the performance of modified nylon. Lesun ensures the stability and reliability of every batch of material through high-standard precision manufacturing.
Reliability Under Higher Torque
Nylon modification is evolving toward higher filling levels, stronger alloying, and greater efficiency. High-torque twin-screw extruders play a key role in boosting conveying capacity, production output, and energy efficiency — all of which rely on the exceptional mechanical strength and reliability of core components.
Lesun is investing over 30 million RMB to introduce advanced international cold forming technology, with full-scale production scheduled for 2025. This process significantly enhances shaft surface hardness, fatigue strength, and dimensional stability — solving long-standing stability and reliability issues in ultra-high torque extruders (torque factor >13).
Suitable for: high-temperature nylon, long-chain nylon, high-glass-fiber reinforced PA, and other high-performance engineering plastics.
This marks a breakthrough in both equipment stability and material processing performance.
Cold-forming processing of screw shafts
In the demanding production of nylon modification, true stability and reliability lie in the technical expertise behind every precision component. Lesun Screw helps you confidently tackle every processing challenge in nylon modification.
Fully enclosed barrel ensuring stable melting and pressure build-up under high fill and controlled processing conditions.
Best suited for:
Melting sections
Pressure build-up zones
Stable conveying conditions
Integrated barrel combining feeding and venting functions to optimize space and enhance process flexibility.
Best suited for:
Compact configurations
Combined feeding and venting
Flexible process layouts
Six-sided geometry enabling uniform torque transfer and rapid screw element replacement.
Best suited for:
Powder coating
Frequent material changes
Fast screw configuration changes
ZME elements combine reverse conveying structure with forward teeth, creating intensive cutting and recombination of melt flow.
Best suited for:
High mixing intensity applications
Difficult-to-disperse materials
High-performance compounding
Simple keyed design for basic torque transmission in low-load extrusion systems.
Best suited for:
Low torque applications
Legacy extruders
PVC processing
SSK conveying elements combine the strong conveying ability of single flight elements with increased free volume.
Best suited for:
Difficult-to-feed materials
Low-density powders and fillers
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