KB 30/5/30 R 30° Forward Kneading Block 5 Discs 30mm Initial Melting Twin Screw Element

KB 30/5/30 R 30° Forward Kneading Block | 5 Discs 30mm Initial Melting Twin Screw Element

KB 30/5/30 R is a standard forward kneading block specially optimized for the initial melting zone of co-rotating twin screw extruders. It adopts 30° forward stagger angle, 5 kneading discs and 30mm effective length, belonging to medium-low shear transitional kneading element. Different from large-angle high-shear kneading blocks, its 30° small stagger angle delivers mild and uniform shear force without generating excessive heat.

Primarily designed for solid material preliminary melting, this element efficiently crushes, shears and softens solid polymer particles in the early extrusion stage. It converts granular solid materials into semi-molten state steadily, laying a foundation for subsequent fine mixing and homogenization. Meanwhile, the forward angle maintains positive material conveying trend to avoid material accumulation and backflow. With compact structure and stable shear performance, it is the core transitional component for smooth solid-to-melt conversion in standard screw layout.

• Professional Initial Melting Design: 30° small forward stagger angle provides mild and stable shear force. It efficiently crushes solid plastic particles and completes preliminary softening and melting, perfectly matching the early melting zone process requirements.
• Forward Conveying Property: Right-hand forward angle maintains stable material forward movement. It prevents solid material stacking and dead zone retention, ensuring continuous and smooth extrusion feeding rhythm.
• Uniform Low-shear Performance: Compared with 45°/60° high-shear kneading blocks, it generates lower shear heat. It avoids local overheating and polymer degradation during solid melting, protecting material basic performance.
• 5-disc Balanced Structure: Reasonable 5-disc combination realizes gradual shear and layered melting. It eliminates unmelted particle residues and improves the uniformity of solid-to-melt transition.
• Compact & Easy Layout: 30mm short-length structure saves screw space. It serves as an ideal transitional unit between conveying segments and high-shear mixing segments to optimize gradient screw configuration.
• High Wear Resistance & Stability: Nitrided steel body with high surface hardness resists particle abrasion. It maintains long-term dimensional stability during continuous solid material extrusion.
• Low Residue & Easy Maintenance: Smooth polished disc surface reduces material adhesion. It shortens purging time and improves efficiency during formula and color switching.

This forward low-angle kneading block is widely used in the initial melting stage of twin screw extrusion lines. It applies to conventional plastic compounding, particle solid melting pretreatment, biodegradable plastic extrusion, masterbatch preliminary homogenization, low-filler material processing and heat-sensitive material melting molding processes.

If you need stable low-shear kneading blocks for solid material preliminary melting and smooth extrusion transition, KB 30/5/30 R 30° forward kneading block is your optimal choice. We provide full customization of spline, material and surface treatment. Contact us now to get factory direct price and professional screw layout optimization solutions.