Single screw extruders may experience malfunctions during long-term operation due to high temperature, high speed, or mismatched raw material characteristics. The following is an analysis of common problems based on the product characteristics of Zhoushan Microwave Screw Machinery Co., LTD:

1. Screw overheating leading to "scorching"

Symptoms: The product color darkens, black scorch marks appear, and even an unpleasant odor is produced.
Cause Analysis: Because Zhoushan Microwave Screw Machinery has introduced foreign technology, its screw surface usually uses bimetallic treatment, which effectively reduces the problem of uneven temperature caused by heat conduction. However, if the raw material viscosity is too high or the cooling system is insufficient, local overheating may still occur.
Suggested Solution: Reduce the rotation speed, increase the speed of the cooling fan, or replace it with a higher-performance cooling fan.

2. Screw blockage and "knotting"

Symptoms: The machine speed decreases, or even automatically shuts down for protection.
Cause Analysis: The raw materials contain a large amount of moisture or impurities, which can easily condense into solids on the screw surface. Although Zhoushan's equipment has high stability, when processing raw materials with high moisture content, attention should still be paid to cleaning the screw.
Suggested Solution: Add a raw material pre-drying step, or regularly clean the screw with a high-pressure water gun.

3. Screw wear and decreased precision

Symptoms: Uneven particle size of the output material, and fluctuations in product quality.
Cause Analysis: The screw is the "heart" of the extruder. Long-term high-load operation will cause wear on the screw threads. Zhoushan Microwave Screw Machinery has more than 10,000 square meters of production workshops and professional precision processing equipment, which can produce high-precision screws and reduce the wear rate.
Suggested Solution: Regularly check the surface finish of the screw, and replace it promptly if wear is found.