Technical Details of TMEStructural GeometryDisc‑shaped base body with multiple straight / helical teeth distributed along circumference. Teeth can be designed with forward, neutral or reverse inclination angles. The element itself has no screw lead and no forward conveying capacity. Disc‑type teeth of twin‑screw interleave and tangent without meshing scraping. Inner bore adopts involute spline. Normally used in sets, with spacer rings assembled between sets. No self‑wiping and self‑cleaning structure, local material retention dead zones exist. Material Configuration- 38CrMoAlA Nitriding Steel: General modification, cost‑effective performance.
- WR5: General wear‑resistant working conditions.
- WR13: Wear‑resistant & corrosion‑resistant, for corrosive materials.
- Nickel‑base Alloy, High‑Speed‑Steel W6: Severe corrosion and heavy‑wear conditions.
Manufacturing ProcessIntegral forging and heat treatment; CNC milling for tooth profile; fillet at tooth root to reduce stress concentration. Dimensional precision guarantees clearance between disc teeth and barrel; sharpness of tooth tip is controllable. Process Parameter Characteristics- Shear level: Medium shear
- Conveying capacity: Almost no forward conveying, prone to local pressure build‑up
- Shear heat: Medium, higher than SME, lower than KB kneading block
- Mixing type: Extremely strong transverse distributive mixing, weak dispersive mixing
- Residence time: Obviously prolonged, broad residence‑time distribution
- Self‑cleaning performance: Poor, retention dead zones exist, heavy cleaning workload for material and color change
| Functions of TME•Strong transverse flow splitting and homogenization Disc teeth divide melt flow with repeated splitting‑recombining cycles, realizing transverse homogenization of melt temperature, components and fillers, eliminating radial differences of composition and temperature. Large specific surface area facilitates intermixing of multiphase systems. • Glass‑fiber wetting and dispersion TME is arranged after side‑feeding glass‑fiber section to improve resin wetting effect on glass fiber and break agglomerated glass‑fiber bundles. Compared with KB kneading blocks, it causes less excessive fiber breakage, suitable for glass‑fiber reinforced formulations. • Improve pre‑conditions for devolatilization Increase melt renewal specific surface area, boost removal efficiency of small‑molecule volatiles in venting section. Install upstream of vacuum devolatilization zone. • Generate local back‑pressure Without conveying capacity, grouped installation can build local back‑pressure, raise melt pressure and promote sufficient wetting of fillers and additives. |
