Used Welex 3.5" 30:1 L/D Extruder – 150 HP, Vented Barrel, Melt Pump & Screen Changer

Manufacturer Information:

• Manufacturer: Welex
• Model: 3.5" 30:1 L/D Extruder
• Condition: Used

Description:

The Welex 3.5" 30:1 L/D Extruder is a high-performance extrusion system, ideal for plastic processing, compounding, and recycling applications. Featuring an electrically heated, water-cooled (closed-loop) vented barrel, this extruder ensures efficient temperature management and consistent melt quality.

Mounted at an approximate 69" centerline height, this extruder's height can be reduced by 8 inches by removing the additional base, allowing for greater flexibility in plant integration.

The system is powered by a 150 HP Emerson DC motor, which is direct-driven in a tuck-under manner via a Lufkin change gear gearbox with a 13.89:1 reduction ratio. A Control Technique Mentor II SCR drive ensures precise speed and torque control for optimal performance.

For enhanced material processing, the unit includes a Dynisco EH-35 hydraulic screen changer with a 3 HP hydraulic pack, mounted on the extruder discharge, along with a 20 HP melt pump with integrated controls.

The integral control panel features fourteen (14) zones of temperature control, providing advanced process optimization for various extrusion applications.

Specifications:

• Screw Diameter: 3.5 inches
• L/D Ratio: 30:1
• Barrel Features:
  • Electrically heated, water-cooled (closed-loop) system
  • Vented barrel for enhanced degassing
• Centerline Height:
  • Approx. 69 inches
  • Can be reduced by 8 inches by removing base
• Gearbox:
  • Lufkin change gear gearbox
  • Reduction Ratio: 13.89:1
  • Direct-driven, tuck-under configuration
• Motor & Drive System:
  • 150 HP Emerson DC Motor
  • Control Technique Mentor II SCR control
• Screen Changer:
  • Dynisco EH-35 hydraulic screen changer
  • 3 HP hydraulic pack
• Melt Pump:
  • 20 HP melt pump with integrated controls
• Control Panel:
  • Fourteen (14) temperature control zones

Applications:

• Plastics & Polymer Extrusion: Pelletizing, sheet extrusion, compounding
• Recycling & Reprocessing: Scrap plastic extrusion and polymer recovery
• Industrial Manufacturing: Pipe, tubing, profile, and sheet extrusion
• Chemical & Specialty Material Processing: Thermoplastics and engineered polymers

Common Product Uses:

• High-efficiency extrusion for plastics and polymer production
• Temperature-controlled extrusion with closed-loop water cooling
• Vented barrel design for improved degassing and impurity removal
• Hydraulic screen changer for seamless filtration and material purity
• Optimized extrusion process with 14 temperature control zones

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