Processing Machinery
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Large current fluctuation of the random copolymer polypropylene pipe special material extruder (Variant: mass production scenario)
Fenómeno del problema
The ammeter reading of the extruder main motor fluctuates greatly, exceeding the normal range.
Current fluctuation reflects unstable screw torque, and may be a precursor of poor plasticization or mechanical failure.
In particular, in continuous mass production, this problem is more prominent and needs key attention.
Análisis de la causa
（1）The barrel temperature is improperly set, and the plasticizing section temperature is too low and the screw torque is large
（2）Hard impurities are mixed into the raw material
（3）The screw and barrel are worn, and the clearance increases
（4）The feeding is uneven, sometimes more and sometimes less
（5）The filter screen is severely blocked, and the die head resistance is large
（6）In continuous mass production, process parameter fluctuations or equipment status changes have aggravated this problem
Solución
（1）Optimize the barrel temperature to ensure that the plasticizing section temperature is at a reasonable value within the range of 200-220°C
（2）Check the purity of the raw material, and install a magnetic frame on the hopper
（3）Check the wear of the screw and barrel, and replace them if necessary
（4）Ensure continuous and uniform feeding to prevent bridging
（5）Regularly replace the filter screen to prevent blockage
（6）And establish standardized work instructions, with special attention to parameter stability in continuous mass production
Conclusión clave
Current fluctuation is caused by large plasticizing resistance or equipment problems, and needs to be solved from temperature control, raw material purity, and equipment maintenance.
In different production scenarios, targeted preventive measures need to be taken.
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