Processing Machinery
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PA12 Glass Fiber Grade Barrel Wear
Problem Phenomenon
【Problem phenomenon】After mass production of glass fiber reinforced PA12, metering fluctuated and product performance declined, and disassembly inspection revealed screw and barrel wear
Cause Analysis
Glass fiber filled nylon is strongly abrasive to the screw and barrel, and ordinary nitrided steel parts have short service life; LSRPF clearly states that fiber-filled grades must use bimetallic barrels and hard screws
Solution
Equip glass fiber grade production lines with bimetallic barrels and hard alloy screws; regularly check the screw clearance to evaluate wear; replace immediately when wear exceeds tolerance to prevent metering drift; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Glass fiber PA12 must be equipped with wear-resistant barrels and screws; wear of ordinary parts is only a matter of time; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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