90 ° Neutral Kneading Block

90° is the maximum conventional staggering angle for kneading blocks, also known as right-angle kneading blocks. The discs are arranged almost perpendicular to the axial direction, with nearly zero active forward conveying capacity; materials are pushed through entirely by upstream pressure. It delivers the highest shear intensity and dispersive mixing capacity among all standard angles, serving as a dedicated intensive dispersive mixing component that can only be arranged in short sets.

• With the extreme staggering angle and maximum flow path deflection, it has almost no forward conveying capacity and no active material propulsion ability.
• It provides the highest shear intensity among all standard angles, with the strongest squeezing and grinding effect on agglomerates and outstanding dispersive mixing capacity.
• Extremely high material fill degree in the zone with significantly prolonged residence time, greatly increasing the total shear action applied to the material.
• High shear heat generation with concentrated thermal input; long series connection can easily cause material overheating degradation, scorching and discoloration.
• Focused on dispersive mixing as its core function, with weaker distributive mixing effect than small and medium angles and limited axial material exchange capacity.

• Deliver extreme-intensity dispersive shear to efficiently break hard, difficult-to-disperse solid agglomerates and greatly refine the dispersed phase size.
• Achieve deep dispersion with short sets, which can replace multiple sets of large-angle kneading blocks to facilitate control of total shear heat input.
• Supports devolatilization and exhaust processing by providing sufficient free volume
• Locally build a high-fill high-pressure zone to assist full plasticating and phase refinement of hard-to-melt and hard-to-plasticate materials.

• Staggering Angle
  A larger angle leads to higher flow path tortuosity, weaker forward conveying capacity and longer material residence time in the mixing zone. Shear intensity rises with the angle, dispersive mixing capacity is gradually enhanced, while the proportion of distributive mixing decreases accordingly. Meanwhile, shear heat input increases synchronously, raising the risk of material overheating degradation.
• Kneading Disc Thickness
  Under the same mixing length, thinner discs correspond to higher disc quantity and higher shear frequency applied to the material, delivering more outstanding dispersive mixing effect but more concentrated shear heat input. Thicker discs provide a longer action interval per shear, more sufficient squeezing and stretching of the material, more remarkable distributive mixing and melting plasticating effect, and relatively stronger conveying capacity.
• Number of Kneading Discs
  More discs lead to longer mixing action length, synchronously increased total material residence time and total shear input, as well as improved mixing uniformity and dispersion sufficiency. However, excessive discs will cause significantly increased conveying resistance, reduced throughput, and obvious shear heat accumulation, which easily leads to material overheating degradation and performance decline. Under the same axial length, the number of discs is inversely proportional to disc thickness, and thin disc units contain more discs.

• 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