Selection and use of melt pumps

First, according to the production demand to select the displacement

melt pump displacement selection should be based on the actual production demand. Displacement directly determines the melt pump conveying capacity, so it needs to be determined according to the specific needs of the production line. In the selection, should take into account the amount of product extrusion, production speed and the required pressure and other factors to ensure that the selected melt pump displacement to meet the production requirements.

Second, how to adjust the output flow?

The output flow of melt pump can be realized by adjusting the speed of the pump. As the melt pump is a positive displacement conveying device, its flow rate and pump speed is strictly proportional to the relationship. Therefore, the output flow rate of the melt pump can be precisely controlled by adjusting the speed of the motor. It should be noted that too high a rotational speed may lead to decomposition of the melt due to high shear, so it is necessary to take full account of the impact of the rotational speed on the conveying capacity during the design, and avoid exceeding the rated speed range of the pump in actual operation.

Third, the use of the process need to pay attention to what?

In the use of melt pumps, need to pay attention to the following points:

Ensure that the melt temperature is appropriate: the melt temperature should be controlled within the operating temperature range of the pump to avoid damage to the pump or reduced conveying efficiency due to too high or too low a temperature.

Regularly check the sealing performance of the pump: The sealing performance of the melt pump directly affects its conveying efficiency and stability. Therefore, it is necessary to regularly check whether the pump seals are worn or leaking, and replace the damaged seals in time.

Keep the pump body clean: Clean the inside of the pump body and the strainer regularly to prevent impurities from clogging the pump body or affecting the pump's conveying efficiency.

Pay attention to the operating status of the pump: during operation, you should pay attention to observe the operating status of the pump, if you find abnormal sound, vibration or temperature rise, etc., you should immediately stop the machine to check and troubleshoot.

Fourth, how to maintain and repair the melt pump?

Maintenance and repair of melt pumps is essential to extend the service life of the pump and improve the conveying efficiency. The following are some common maintenance and maintenance measures:

Regular replacement of lubricating oil: According to the instruction manual of the pump, replace the lubricating oil regularly to ensure the normal operation of the pump lubrication system.

Clean the inside of the pump body: Periodically clean the inside of the pump body to remove residual melt and impurities to prevent clogging or wear of the pump body.

Check bearings and seals: Regularly check the wear of bearings and seals, and replace them in time if serious wear or leakage is found.

Keep the electrical system clean and dry: Regularly clean the dust and debris on the electrical system and keep it clean and dry to prevent electrical failure.

Handling during long-term shutdown: If the melt pump needs to be shut down for a long period of time, the melt in the extrusion gear pump body should be emptied and the inside of the pump body should be cleaned to prevent the melt from solidifying or corroding the pump body.

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