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QUAD/OCTA SCREW EXTRUDER

Technovel Original and Innovative Product
Octa Model "WDR-OT Series"
Quad Model "WDR-QD Series"
  • POINT01
    Best performance in all extruder

    Quad/Octa screw extruder is Technovel new machine that enable kneading that was not possible with twin screw extruder.

  • POINT02
    Solving impossible compounds by multi screw extruder

    "I aim to enhance the blending efficiency."
    "I seek to prolong the residence time."
    "I aspire to optimize the spatial efficiency of equipment installation."
    "I endeavor to reduce torque by shortening the L/D ratio."
    Realizing a compound system in areas unattainable with a twin screw extruder.

Other Features

  • 1
    Improvement of kneading performance
  • 2
    Long time residence
  • 3
    High degassing performance
  • 4
    Volumed feeding system
  • 5
    Maximum dispersibility
  • 6
    Space saving, energy saving

Technical Data

Screw diameter 08, 15, 20, 25, 32, 40, 48, 60, 71, 92
Number of screw QD : Quad screw type
OT : Octa screw type
L / D 15～150
Grade “WDR” series
Screw type NH : Standard depth of screw grove
SH : Deeper screw depth
OT : Other specification
Screw rpm 100～10,000rpm
Multi Screw Extruder QUAD / OCTA | Technovel

Intermeshing Points

More screws mean more intermeshing points

An intermeshing point is where two neighboring screws engage with each other, and the count rises as the number of screws grows.
The more intermeshing points there are, the more often the screws engage at their outer diameter during the extrusion process.

2 SCREW / TWIN
Intermeshing points 2
4 SCREW / QUAD
Intermeshing points 6
8 SCREW / OCTA
Intermeshing points 14

* The dark points in the diagram mark the intermeshing points. For N screws, the count is 2 × (N − 1): 2 screws give 2, 4 screws give 6, 8 screws give 14.

Applications

Process tasks suited to multi screw extruders

Drawing on the multi screw characteristics of strong kneading, large free volume and a gentle thermal history,
we map the applications by asking “which strength belongs in which process.”

Dispersive Mixing of Highly Viscous and Hard to Disperse Materials
Harnessing the strong kneading force of many intermeshing points
Very high molecular weight materials such as UHMWPE Super Engineering Plastics (PEEK / PPS / LCP / PEI) Highly Filled Compounds Highly Viscous, Poorly Flowing Materials
Dispersion of Nano and Functional Fillers
Combining high shear with distributive mixing
Graphene / Graphite Dispersion CNT / Nanocellulose (CNF) Higher Strength and Wear Resistance
Reactive Processing
Exploiting the long residence time of a large free volume
Reactive Extrusion / Continuous Polymerization Grafting / Compatibilization / Dynamic Crosslinking (TPV) Chemical Recycling / Depolymerization / Monomerization Reaction Control with Catalysts and Additives
Devolatilization / Degassing / Deodorization
Combining free volume with surface renewal
Multistage Vent Continuous Degassing Removal of Residual Monomer / Solvent Devolatilization of Highly Viscous Systems Enhanced Devolatilization through Surface Renewal
Low Temperature, Low Damage Processing
Working with a low temperature profile
Biomass Plastics (PLA) Cellulose Composites (CNF / Natural Fiber) Low Temperature Kneading of Heat Sensitive Materials Material Recycling / Recycled Compounds
Scale Up
Securing kneading through the number of intermeshing points at low speed, while holding shear down
Scale Up from Twin Screw to Multi Screw for Mass Production Low Screw Speed with the Required Kneading Secured Reduction of Shear Heating Mass Production of Heat and Shear Sensitive Materials

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