Structural characteristics and application range of twin-screw extruder

The screw and barrel of the extruder are designed based on the principle of building blocks. The thread shape, barrel structure, length to diameter ratio, number of feeding and exhaust positions, mesh changing and cutting methods, and electrical and instrument control mode can all be optimized and adjusted according to the material system and process requirements, achieving a unified consideration of multifunctionality, multi-purpose, and specific specificity. It has the characteristics of high productivity and low specific energy consumption.

Scope of application: Blending modification (rubber blending, plastic alloys), homogeneity, plasticization, filling modification, granulation. Engineering polymer and fiberglass (carbon fiber) reinforcement. Masterbatch, functional masterbatch.

Color masterbatch. Special materials, powder coatings, petroleum pipeline coating materials. Reaction extrusion. Various cable materials. Exhaust volatilization post-treatment.

Daily maintenance of twin-screw extruder:

1. After using the twin-screw extruder for a period of time, it is necessary to conduct an inspection to check the tightness of all screws.

2. If there is a power interruption in production, the main drive and heating will stop. When the power supply is restored, each section of the material barrel must be reheated to the specified temperature and kept warm for a period of time before the extruder can be started.

3. After 1500 hours of use of the new extruder, there will be impurities in the gearbox, so the gears should be cleaned and the gearbox lubricating oil should be replaced.

4. If the instrument and pointer are found to be fully turned, the contact of the thermocouple and other edges should be checked for good condition.

5. No debris is allowed inside the material, and hard objects such as metal and sand are strictly prohibited from entering the hopper and extruder.

6. When opening the material cylinder cover or suction cover, be sure to prevent foreign objects from falling into the main engine.

7. There should be sufficient preheating and heating time, and the manual turning should be light and fast before driving. After reaching the set process temperature, it should be kept at a constant temperature for 1 hour.

8. The screw is only allowed to start at low speed, and the idle time does not exceed 3 minutes.