Extruder Closed Screw Barrel

The closed barrel is a fully enclosed modular barrel segment for co-rotating twin-screw extruders, without any through openings on top or side walls. It features a standard figure-8 twin-bore inner cavity, replaceable wear-resistant liner, independent heating/cooling channels and temperature sensing holes. It is always assembled together with open barrels in a complete extrusion line.

• Fully Enclosed Material Conveying
  The sealed cavity prevents melt leakage and powder overflow, steadily conveying solid pellets and molten material forward.
• Melting & Pressure Build-up
  Combined with sectional temperature control and screw shear heat, it fully melts resin and generates stable melt backpressure for homogenization and extrusion.
• Dispersion & Distribution Mixing
  Cooperates with kneading blocks and screw elements inside the sealed space to evenly disperse fillers and additives.
• Precise Zoned Temperature Control
  No heat loss from openings, delivering consistent temperature field to avoid thermal degradation of heat-sensitive materials.
• Stable Sealing to Prevent Melt Backflow
  The closed structure maintains constant pressure and eliminates material backflow, stabilizing output and product homogeneity.

• Stable melt pressure without obvious fluctuation.
• Uniform temperature field for precise plasticization.
• Good sealing performance, no dust or melt spillage.
• Low maintenance cost due to separable inner liner.
• High structural rigidity to withstand heavy load and high pressure.

• Structure: Closed barrel has no through openings; open barrel is equipped with feeding, venting or side-feeding ports.
• Function: Closed barrel undertakes melting, mixing and pressure building; open barrel is for feeding, vacuum devolatilization and auxiliary feeding.
• Pressure capacity: Closed barrel keeps stable high pressure; open barrel is easy to release pressure.
• Temperature performance: Closed barrel has more steady temperature without heat loss.

• 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