Vented Screw Barrel | Twin Screw Extruder Degassing Barrel
Barrel with vent openings for efficient removal of moisture, volatiles and trapped gases.
Vented screw barrels are designed to enable efficient devolatilization by creating a controlled pressure release zone within the extrusion process.
By operating under partial-fill conditions, the melt expands at the vent opening, increasing surface exposure and facilitating the removal of entrapped air, moisture and volatile components. The venting system supports both atmospheric and vacuum operation, enabling multi-stage degassing from surface moisture removal to deep volatile extraction.
Optimized vent geometry combined with specialized vent inserts ensures effective gas-solid separation while minimizing the risk of material carry-over or vent flow. High-precision sealing systems are applied for vacuum operation to maintain stable negative pressure conditions.
| Inner Diameter | 20–400 mm |
| Length | 1D～8D |
| Compatible Models | Ø18–Ø400 |
| Body Material | N00/CK45/A42/Stainless |
| Liner Material | D11/W6/ H6+/H26 |
| Liner Process | Solid sleeve/Sintering Process/Laser Cladding Process |
| "∞" Hole | Cylindricity≤0.02 mm Position≤0.04mm |
| Pressure Rating | ≤50MPa |
| Operating Temperature | 0°C to 450°C |
| Heating Method | Cast copper or aluminum heaters/heating rods/electromagnetic induction heating |
| Cooling Method | Water-cooled/air-cooled/oil-cooled |
| Connection Method | Standard flange connection/clamp-type connection |
A: It allows gases to escape without pressure blockage.
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Integrated barrel combining feeding and venting functions to optimize space and enhance process flexibility.
Best suited for:
Compact configurations
Combined feeding and venting
Flexible process layouts
Barrel with side feeding port for controlled addition of fillers, fibers or additives during processing.
Best suited for:
Fiber reinforcement
Filler addition
Multi-component compounding
Primary feeding barrel introducing raw materials into the extruder under controlled fill and stable conveying conditions.
Best suited for:
Main material feeding
Pellet and powder input
Stable process start
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