Extruder and screen changer matching principle

The principle of matching the extruder to the screen changer is based on the following aspects:

Extruder type and model:

Single-screw extruders differ from twin-screw extruders in their structure and working principle, so the type and configuration of screen changer required will also differ.

The type of extruder determines its production capacity, which in turn affects the filter area and filtration accuracy of the screen changer.

Throughput and filtration requirements:

Extruder throughput determines the amount of melt to be processed per unit of time, which directly affects the screen changer's filtration area and filtration efficiency.

Depending on the continuity requirements of the line, the right screen changer should be selected to ensure production stability and efficiency.

Stream pressure and temperature:

The flow pressure generated by the extruder during the extrusion process is an important factor to consider when selecting a screen changer. The screen changer must be able to withstand this pressure and ensure that it works properly at high pressures.

The temperature stability of the melt places certain requirements on the material and sealing properties of the screen changer to ensure that there is no leakage or damage at high temperatures.

Screen diameter and matching:

The screen diameter of the extruder is usually not lower than the screw diameter to ensure that the melt passes through the screen and achieves the desired filtration effect.

Screen changers should be configured to match the screen diameter of the extruder to ensure smooth operation of the filtration system.

Automation and compatibility:

As the level of automation increases, more and more extruders are equipped with automated control systems. Screen changers should also be equipped with corresponding automation functions, such as automatic screen changing, pressure monitoring, etc., to improve production efficiency and safety.

The compatibility of the screen changer with the extruder is also a factor to be considered to ensure that the two can work together and achieve the best production results.

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