Upgrading your extrusion screws can dramatically improve line productivity, product quality, and equipment lifespan. This case study highlights how a leading PVC pipe manufacturer successfully upgraded their worn-out screws to a custom-designed conical twin-screw system supplied by Zhoushan Juyuan Machinery Co., Ltd.
🏭 Customer Background
- Location: Eastern Europe
- Product: Rigid PVC pipes with 40% CaCO₃ filler
- Machine: KraussMaffei KMD 2/50 conical twin-screw extruder
- Challenge: Frequent downtime due to screw wear, unstable output, and high energy consumption
🔍 Problems Faced Before Upgrade
- Screw flights and barrels wore out after 12,000 hours, causing metal contamination and product defects
- Extrusion pressure fluctuated, leading to inconsistent pipe wall thickness
- Energy costs were high due to excessive screw RPMs compensating for poor melt quality
- Long OEM spare part lead times (8+ weeks) caused extended production stoppages
🛠️ Our Upgrade Solution
- Supplied a custom conical twin-screw and barrel set with:
- Bimetallic barrel liner for superior abrasion resistance
- Hardfaced screw flights (Colmonoy welding) to extend service life
- Optimized screw geometry tailored to the customer’s PVC formulation and output requirements
- Provided technical support on installation and startup parameters
- Committed to a fast turnaround: delivery within 4 weeks
📈 Results After Upgrade
| Metric | Before Upgrade | After Upgrade |
|---|---|---|
| Screw Service Life | ~12,000 hours | >24,000 hours |
| Extrusion Pressure | Fluctuating | Stable |
| Output Consistency | Poor | High |
| Energy Consumption | Baseline | Reduced by 10% |
| OEM Lead Time | 8+ weeks | 4 weeks (our delivery) |
The upgrade not only doubled the screw life but also improved product quality and reduced production costs.
💡 Why Choose Zhoushan Juyuan for Your Upgrade?
- Precise matching or improving OEM screw designs
- Use of wear-resistant materials and advanced coatings
- Fast, reliable global delivery
- Expert engineering and after-sales support
📲 Ready to Upgrade Your Conical Twin-Screws?
If your extrusion line suffers from frequent screw wear, unstable output, or long spare part lead times, contact us for a custom upgrade solution.
📌 Zhoushan Juyuan Machinery Co., Ltd.
📧 Email: cxj.job@gmail.com
🌐 Website: https://juyuan-machinery.com/
📱 WhatsApp: +85244499051
Transform your extrusion performance and reduce downtime with our expert screw upgrades.