Save Power, Extend Uptime: A Practical Guide to Twin-Screw Extruder Maintenance

About Ningbo Fangli Technology Co., Ltd.

Ningbo Fangli Technology Co., Ltd. is a mechanical equipment manufacturer with over 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, PVC-O pipe extrusion line, RTP pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.

What Is a Twin-Screw Extruder?

A twin-screw extruder processes solid powder–liquid dispersions in which the solid phase is dominant. Using the self-adhesion of the dispersed material, it bonds and enlarges the primary particles of solid powder through mechanical force, forming concentrated particle groups of uniform shape and particle size.

Here is a brief guide to saving electricity and improving the maintenance of your twin-screw extruder:

1. Stop immediately if you hear abnormal noise. If abnormal noise occurs during operation, shut down the twin-screw extruder at once for inspection or repair.

2. Never run the extruder empty. Empty running can damage the screw and the machine.

3. Inspect key parts regularly. The screw should be pulled out for inspection, measurement, and identification. Parts that have reached the specified wear limit should be replaced according to their actual wear condition, and damaged parts should be repaired.

4. Follow a regular maintenance schedule. As a rule, shut down the twin-screw extruder for scheduled maintenance after 2,500–5,000 hours of continuous operation.

5. Store the machine properly during long downtime. If the twin-screw extruder will not be used for an extended period, leave the screw inside the barrel rather than removing it, and coat the working surface of the head with anti-rust grease. Calibrate temperature control instruments regularly, and check that their regulation and control sensitivity are correct.

6. Keep metal and other foreign objects out of the hopper. This prevents damage to the screw and barrel. To stop iron impurities from entering the barrel, install a magnetic frame at the barrel feeding port, or sieve the material in advance.

Need More Information?

If you would like more information, Ningbo Fangli Technology Co., Ltd. welcomes you to contact us for a detailed inquiry. We will provide professional technical guidance or equipment procurement suggestions.