If you run an Arburg injection moulding machine, you know its performance depends heavily on the screw and barrel inside. Over time, these parts wear down due to abrasion, corrosion, and high processing temperatures — which can reduce product quality and slow production.

Whether you’re replacing worn components or upgrading for better efficiency, choosing the right screw barrel for your Arburg machine is critical.

1. Understanding the Role of Screw and Barrel

In an Arburg injection machine, the screw rotates inside the barrel to:

• Convey plastic pellets from the hopper
• Melt and mix the material evenly
• Build up pressure before injection into the mould

A precision-fit screw barrel ensures:

• Stable cycle times
• Consistent melt quality
• Reduced material waste
• Longer equipment lifespan

2. Why Arburg Machines Require Precision Components

Arburg machines are known for high precision and repeatability in moulding.
However, even the best machine can suffer from:

• Poor melting if screw flights are worn
• Inconsistent shot sizes due to barrel wear
• Material degradation from excessive residence time

That’s why screw barrel replacements for Arburg machines must meet tight tolerances and match OEM specifications.

3. Common Materials for Arburg-Compatible Screw Barrels

Depending on the plastics you process, you should choose the right material and coating:

• Nitride Steel – General-purpose, cost-effective for non-abrasive resins
• Bimetallic Barrel – For abrasive or glass-filled plastics, offering high wear resistance
• Corrosion-Resistant Alloys – For PVC, flame-retardant, or chemically aggressive resins

4. Signs You Need to Replace Your Screw Barrel

Watch for these warning signs:

• Black specks or unmelted pellets in moulded parts
• Rising melt temperature fluctuations
• Need for higher back pressure to achieve quality
• Visible wear on screw flights during inspection

5. Customization for Arburg Models

Arburg produces a wide range of models, such as:

• ALLROUNDER 270, 370, 470, 570, 630, 720 series
• Servo-electric, hydraulic, and hybrid systems

When ordering a replacement screw barrel, you’ll need:

• Machine model and year
• Screw diameter and L/D ratio
• Processing material type
• Any special mixing or venting requirements

6. Maintenance Tips to Extend Life

• Always purge material before shutdown or material change
• Avoid running at excessive screw speed or back pressure
• Use melt temperature monitoring to avoid overheating
• Schedule periodic wear measurement with micrometers

For more about wear measurement, see our guide: Injection Moulding Screw & Barrel Measurement Tips.

Conclusion

Your Arburg injection machine can deliver outstanding results — but only if the screw and barrel are in top condition. Choosing the correct replacement ensures high-quality moulded parts, lower downtime, and better cost control.

If you need OEM-compatible or customized screw barrels for Arburg machines, we can help with precision manufacturing, wear-resistant materials, and fast delivery.

📩 Contact Zhoushan Juyuan Machinery Co., Ltd.
Email: cxj.job@gmail.com
Phone/WhatsApp/WeChat: +86 13905808474
🌐 Website: https://juyuan-machinery.com/