In the field of nylon modification processing, has your twin-screw extruder ever faced issues of uneven mixing, quality fluctuations, or capacity bottlenecks? Many users may not yet realize that the solutions to these challenges often lie within the core components of the equipment.
As a leader deeply engaged in the core technology of twin-screw extrusion, Nanjing Lesun Screw Co., Ltd. understands that the quality of core components is the lifeline for stable and efficient modification processing!
Main products of Lesun Screw: screw elements, shafts, barrels
A Tool for Upgraded Mixing Effects
Nylon modification demands extremely high standards for dispersive and distributive mixing. The special specification screw elements developed by Lesun Screw can achieve gentler and more uniform mixing compared to conventional shearing elements, significantly reducing molecular chain degradation caused by excessive shearing. This enhances the mechanical properties and consistency of the appearance of nylon-modified materials.
Precision Equals Quality
The machining accuracy, surface roughness, and batch consistency of screw elements, barrels, and shafts directly determine the stability of melt conveying, the uniformity of residence time distribution, and the quality of the final product. Differences as small as a millimeter can affect the key performance indicators of nylon-modified materials. Lesun guarantees the high quality of each batch of nylon materials with precision manufacturing on a military level.
Various testing instruments
High Torque, Greater Future
Nylon modification is developing toward higher filling, stronger alloys, and higher efficiency. Lesun understands the significance of high-torque twin-screw extruders for nylon processing—stronger conveying capacity, higher output limits, and better energy efficiency are the cornerstones of meeting future challenges. All of this relies on the extraordinary mechanical strength and reliability of core components.
Facing the future, Lesun is making a bold move! The cold rolling shaft machining technology, which Lesun invested over 20 million, will be mass-produced in 2025! This breakthrough in core technology, synchronized with world-class levels, will completely solve the stability and reliability problems of ultra-high torque models with torque coefficients above 13. The cold rolling process endows the shaft with unparalleled surface hardness, fatigue strength, and dimensional stability, providing rock-solid support for the demanding processing of high-end nylon modifications (such as high-temperature nylon, long-chain nylon, high glass fiber reinforced nylon), helping customers reach new heights in material performance and production efficiency.
Cold rolling shaft machining
In the arena of nylon modification, the "heart" and "bones" of the equipment determine how far you can go. Nanjing Lesun Screw, with cutting-edge technology, precision manufacturing, and forward-looking planning, is committed to becoming your most reliable "invisible champion" on the road to success.
Lesun Screw: Precision forging of the "core", assists nylon modification to win the future!
Lesun Screw | Focus on Compounding, Serving the World
From Nanjing to a broader world: As an emerging manufacturing enterprise in China, we have been focused on the production and custom development of core components for twin-screw extruders since our founding in 2004. Our customers include industry-leading manufacturers in modified plastics, recycled plastics, pharmaceuticals, powder coatings, feed, and other fields, serving 7 billion people worldwide.
Manufacturing Facility in Jiangning District, Nanjing
For over 20 years, Lesun Screw has stood for first-class products, future-oriented technologies, and uncompromising reliability. From sales and design development to production and quality control, our team of highly skilled engineers and technical specialists is able to meet demanding delivery requirements, including rapid response and prototype development. This comprehensive capability has positioned LesunScrew as a leading supplier of core components for twin-screw extrusion and compounding systems.
You can rely on Lesun's fully integrated system. Our extensive screw-element machining database not only ensures fast and stable product delivery, but also supports customized solutions to meet stringent requirements for wear resistance, corrosion resistance, and other high-performance standards. This is our commitment to delivering high-quality "Made-in-China Intelligence" products to customers worldwide.
Simple keyed design for basic torque transmission in low-load extrusion systems.
Best suited for:
Low torque applications
Legacy extruders
PVC processing
Transition elements are designed to connect different screw element geometries while minimizing dead zones and material retention.
Best suited for:
Transition between single and double flight elements
Connection between SK and standard conveying elements
Geometry change zones within complex screw configurations
Stretching elements, also called S-type elements, improve material exchange and distributive mixing in partially melted zones.
Best suited for:
Semi-plasticized material zones
Improved dispersion
Gentle mixing processes
Cold-Forming high-torque shaft with improved strength and fatigue resistance for demanding extrusion conditions.
Best suited for:
High torque extrusion systems
High filler compounding
Continuous high-load production
Double flight conveying elements are the most widely used design in twin screw compounding. They provide the best balance between free volume and torque transmission.
Best suited for:
Feeding sections
Venting zones
Pressure control sections
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
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