by kanziye@gmail.com
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Best Gearboxes for Plastic Extrusion Lines – A Guide to High-Torque Precision Drives
Plastic extrusion is a high-demand, continuous process where power transmission must be smooth, reliable, and precise. At the heart of every extrusion line lies the gearbox — converting motor power into the exact torque and speed needed by the extruder screw.
At KNGEAR, we supply custom-engineered gearboxes designed specifically for twin-screw extruders, pipe lines, sheet production, and recycling systems.
⚙️ Why Gearboxes Matter in Extrusion Systems
The gearbox in an extrusion machine must:
- Transmit high torque at low speed
- Withstand continuous axial thrust from the screws
- Maintain consistent motion to ensure product quality
- Handle long operating hours without overheating
- Fit precisely into limited machine space
🔧 Recommended Gearbox Types for Extrusion
| Gearbox Type | Application | Features |
|---|---|---|
| Planetary Gearbox | Side feeder, compounding mixers | High torque density, compact design |
| Parallel Shaft Gearbox | Single-screw extruder, sheet lines | Stable output, easy maintenance |
| Twin-Screw Extruder Gearbox | PVC, PE, PP extrusion | Dual output shafts, axial force support |
| Right-Angle Bevel Gearbox | L-shaped machine layouts | Space-saving, 90° power transfer |
🏭 Typical Uses of KNGEAR Extrusion Gearboxes
- PVC pipe extrusion lines
- Plastic film and sheet production
- Granulator and pelletizer systems
- Masterbatch and compound blending
- Twin-screw underwater pelletizing lines
🛠️ Key Design Features of Our Extruder Gearboxes
- Custom-designed torque split shafts (for twin-screw)
- Output torque up to 120,000 Nm
- Reinforced axial thrust bearings
- Carburized & ground gears (DIN 6 accuracy)
- High-quality housings with heat dissipation ribs
- Integrated oil circulation & temperature control (optional)
✅ Why Choose KNGEAR for Extrusion Gearboxes
- 15+ years of experience in plastic machinery gear units
- OEM replacement capability for major brands
- In-house heat treatment and gear grinding
- Technical support from drawing to commissioning
- Proven performance in both domestic and export markets
📧 Email us at info@kngear.com for technical support or to request a quote for your extrusion gearbox needs.
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