Processing Machinery
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TPE Barrel Zone Temperature
Problem Phenomenon
Uneven plasticization and cloud marks on products, or nozzle drooling and cold material spots on products
Cause Analysis
TPE barrel zoning: rear zone 160-180℃, middle zone 170-200℃, front zone 180-220℃; nozzle temperature is independently controlled; improper zoning causes uneven plasticization or drooling
Solution
①Barrel rear zone 160-180℃, middle zone 170-200℃, front zone 180-220℃; ②Nozzle temperature slightly lower than the front zone; ③Cold slug well setting
Key Takeaway
TPE barrel zoning is the basis of uniform plasticization; the three-zone gradient plus independent nozzle temperature control, neither can be omitted; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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