SME Screw Element

The SME element are classic distributive mixing functional components in twin-screw extrusion systems. Based on the forward conveying screw substrate, multiple reverse shallow reflux slots are machined on flight tips. While retaining forward conveying capacity, they enhance axial material exchange and distribution homogenization, serving as a core solution to improve mixing quality in melting and homogenizing zones.

• Based on standard forward conveying screw elements, multiple reverse-inclined shallow reflux slots are machined on flight top surfaces along the axial direction.
• With shallow slot depth and customizable slot quantity, it retains the complete spiral conveying profile with excellent flow channel continuity.
• Rounded transition between flights and slots eliminates material retention dead corners, delivering outstanding self-wiping performance.

• This element is based on a standard conveying screw element, with a number of through slots machined on the flights to connect adjacent screw channels. The slots create a leakage flow effect, promoting transverse material exchange between neighboring channels and forming local material circulation, which homogenizes the melt and enhances longitudinal distributive mixing.
• As the slots on the flights reduce the element’s forward conveying capacity and pressure build-up capacity, they increase the material fill degree in the screw channels and extend the material residence time. The material undergoes low-intensity shear during this process, achieving uniform and mild distributive mixing.

• Integrate dual functions of forward conveying and distributive mixing, strengthening inter-layer material exchange while maintaining stable material advancement.
• Form multiple melt split flows and reflux through shallow flight slots, disrupt laminar flow, and improve the uniformity of material temperature and composition.
• Assist melting and plasticating, extend effective material residence time in the melting zone, and promote full melt plasticization.

• Achieves distributive mixing in a low-shear manner with mild thermal input, effectively preventing thermal degradation of heat-sensitive materials.
• High material fill degree and sufficient residence time ensure stable melt homogenization and component mixing performance.
• Retains basic forward conveying capacity with controllable conveying performance loss, balancing mixing effect and production throughput.
• Simple structure with controllable machining accuracy, compatible with most mainstream specifications of twin-screw extruders.

• Can be installed upstream of reverse screw elements or reverse kneading block assemblies to pre-homogenize the material in advance, providing a uniform melt foundation for subsequent pressure building and high-shear mixing processes.

• Targeted Material & Process Optimization: Optimize base material formulation and heat treatment processes to improve wear resistance, corrosion resistance and impact resistance
• Custom Production per Drawings & Samples: Precisely manufacture replacement elements perfectly compatible with your equipment
• 100% Full Inspection Before Delivery: Complete dimensional quality inspection with full inspection reports
• 24-Hour Responsive After-Sales Service: Exclusive after-sales channels with 24-hour response time
• Professional Selection & Process Consultation: Technical advice on screw element configuration, material selection and screw arrangement solutions
• Reverse Engineering & Non-Standard Customization: High-precision reverse engineering for obsolete equipment models
• Rapid Prototyping & Small-Batch Trial Production: Support for new solutions to shorten R&D cycles
• Service Life Assessment & Optimization Guidance: Regular product status tracking and wear detection
• Flexible Stock & Delivery Guarantee: Safety stock service for regular spare parts and urgent orders

Properties: High precision, high quality, long service life, wear-resistant, corrosion-resistant and durable.

Compatibility: Compatible with most well-known extruders