wiadomości o firmie What to do when the screw feed extruder malfunctions?

1. The first common problem: "Unstable speed, fluctuating between high and low." This is the most frequently encountered issue. For example, the screw is set to rotate 50 revolutions per minute, but the actual speed fluctuates between 45 and 55 revolutions per minute, resulting in uneven product thickness. There are two possible causes: first, unstable voltage, with fluctuating mains voltage affecting motor speed; second, a malfunctioning feedback device in the speed control system, such as the frequency converter failing to monitor the speed in real time, thus preventing adjustment.

The solution is simple: if it's a voltage issue, install a voltage regulator on the extruder to ensure stable voltage; if the feedback device is faulty, replace the corresponding sensor (such as a speed sensor) to allow the system to accurately monitor the speed and adjust accordingly.

2. The second common problem: "Speed ​​cannot be adjusted, only either fast or slow." For example, trying to adjust the screw speed from 50 revolutions per minute to 60 revolutions per minute, turning the knob has no effect, or it directly reaches the maximum speed. Possible causes include "stuck or damaged adjustment components": For manually adjustable machines, the gear under the knob may be stuck; for variable frequency machines, the inverter parameters may be set incorrectly, such as "fixed speed," making adjustment impossible.

Solutions: For manually adjustable machines, disassemble the knob and clean the dust or debris from the gears; replace damaged gears. For variable frequency machines, reset the inverter parameters, changing "fixed speed" to "adjustable speed," or contact the manufacturer for assistance with debugging.

3. The third common problem: "Bubble or cracks appear in the product after increasing the speed." This is not due to a faulty speed control itself, but rather a mismatch between the speed and the processing requirements of the raw materials. For example, if the screw speed is set too high, the raw materials will not stay in the machine for a sufficient time to melt or expel air, resulting in bubbles; if the raw materials are hard, too high a speed will not allow for sufficient grinding, leading to cracks.

Solution: Adjust the speed according to the characteristics of the raw materials. For example, for hard raw materials or raw materials that need to be fully melted, slow down the speed appropriately to allow the raw materials enough time to be processed. If you want to increase the speed, you can increase the heating temperature to help the raw materials melt quickly and avoid producing defective products.

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