30°/45°/60° Kneading Blocks

Kneading blocks are the core compounding functional components in co-rotating twin-screw extrusion systems, assembled from multiple eccentric kneading discs arranged at a set staggering angle. Driven by the conjugate intermeshing rotation of twin screws, materials undergo continuous shearing, squeezing, folding and splitting-recombination in disc gaps and intermeshing zones, efficiently completing melting & plasticating, dispersive mixing and distributive mixing. They are the key components that determine the compounding precision, product quality and process adaptability of the entire production line.

• Modular Eccentric Disc Structure 
  Assembled from multiple independent eccentric kneading discs along the axial direction at a fixed staggering angle. Disc thickness, staggering angle and lobe count can be customized as required to flexibly form functional units with different compounding intensities.
• Conjugate Intermeshing Profile Design 
  The discs adopt a precision conjugate curved surface design. Kneading blocks on the two screws achieve close meshing and wipe each other’s contact surfaces during rotation, delivering good self-wiping performance.
• Fully Parametric Configuration Customization 
  Multi-dimensional customization is supported by rotation direction (forward/reverse), lobe count (double-lobe/triple-lobe), disc thickness and staggering angle, to accurately match the compounding requirements of different material systems and process targets.

• Shearing Action for Dispersive Mixing 
  When passing through the crescent gap between the kneading disc and the barrel inner wall, as well as the intermeshing gap between discs, the material bears high-intensity shearing and squeezing forces. This efficiently breaks solid agglomerates such as pigments, fillers and additives to achieve fine dispersive mixing.
• Splitting & Folding for Enhanced Distributive Mixing 
  As eccentric discs rotate with the screw, they continuously split, redirect, fold and merge the melt, disrupt laminar flow, promote full blending of materials with different components and temperatures, and improve the uniformity of component distribution and temperature field.
• Squeezing & Compaction for Melting & Plasticating 
  The eccentric structure exerts periodic squeezing and relaxation effects on the material, accelerating the compaction, shear heat generation and melting process of solid materials, and improving plasticating efficiency and melt uniformity.
• Rotation Direction Difference Regulates Material Flow 
  Forward kneading blocks have weak forward conveying capacity, pushing materials forward while compounding. Reverse kneading blocks create conveying resistance, increase local material fill degree and extend residence time to deepen compounding effect.

• 30° staggering angle: Delivers the strongest forward conveying capacity and mildest shear, designed for plasticating heat-sensitive materials and high-throughput low-shear conditions.
• 45° staggering angle: Balances shear intensity and conveying performance with the widest versatility, serving as the standard option for conventional modification compounding.
• 60° staggering angle: Provides the highest shear strength and optimal dispersion effect with the weakest conveying capacity, for highly filled, hard-to-mix systems with high dispersion requirements.

• 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