Reasons for large pressure fluctuations at the outlet of the melt pump

The reason for the large pressure fluctuation at the outlet of the melt pump may involve multiple aspects. Here are some common reasons:

1. Improper operation: The operation of the melt pump requires certain experience and skills. If the operator lacks sufficient professional knowledge or operates improperly, it may lead to unstable pump operation, resulting in fluctuations in outlet pressure.

2. Equipment aging: With prolonged use of the melt pump, its internal components will gradually wear out, leading to a decrease in pump performance. Especially vulnerable components such as seals, gears, and bearings of the pump, if severely worn, may cause outlet pressure fluctuations.

3. Unreasonable pipeline layout: If the pipeline layout is unreasonable or there are problems such as flow obstruction and dead corners, it will cause an increase in fluid resistance or flow instability, thereby affecting the outlet pressure of the pump.

4. Temperature instability: The operation of the melt pump requires a high-temperature environment, and the viscosity of the melt is closely related to temperature. When the temperature changes too much, the change in viscosity will affect the flow rate of the pump, leading to fluctuations in outlet pressure.

5. Bubbles at the pump inlet: During transportation, the melt may produce bubbles. If these bubbles are not eliminated in a timely manner, it may lead to unstable flow and pressure of the pump.

In summary, the reasons for the fluctuation of the outlet pressure of the melt pump may involve multiple aspects such as operation, equipment, pipeline layout, temperature, and bubbles. To solve this problem, it is necessary to investigate the possible causes one by one and take corresponding measures for repair and optimization.

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