Processing Machinery
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Random copolymer polypropylene pipe special material (Nordic standard） extruder large current fluctuation（Variant: Mass Production Scenario）
Problem Phenomenon
The extruder main motor ammeter reading 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, during continuous mass production, this problem is more prominent and requires key attention.
Cause Analysis
（1）Barrel temperature set improperly, plasticizing section temperature too low, screw torque large\
（2）Hard impurities mixed into the raw material\
（3）Screw and barrel worn, clearance increased\
（4）Feeding uneven, sometimes more and sometimes less\
（5）Filter screen severely clogged, die head resistance large\
（6）In continuous mass production, process parameter fluctuations or equipment status changes aggravate this problem
Solution
（1）Optimize the barrel temperature, ensure the plasticizing section temperature is at a reasonable value within the 200-220°C range\
（2）Check raw material purity, install a magnetic rack on the hopper\
（3）Check screw and barrel wear, replace if necessary\
（4）Ensure continuous and uniform feeding, prevent bridging\
（5）Regularly replace the filter screen to prevent clogging\
（6）And establish standardized work instructions, paying special attention to parameter stability in continuous mass production
Key Takeaway
Current fluctuation is caused by large plasticization resistance or equipment problems, and needs to be solved from temperature control, raw material purity and equipment maintenance.Targeted preventive measures need to be taken in different production scenarios.
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