Material Drying
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PPO Junlong MPPO Process Baseline
Problem Phenomenon
【Problem Phenomenon】MPPO mold trials lack a starting process baseline, and debugging takes detours
Cause Analysis
Junlong MPPO series reference: barrel rear 260/middle 270/front 280℃, nozzle 280℃, mold temperature 80-100℃, injection pressure 126MPa, screw 73rpm, drying 90-110℃×3-4h; can be used as a debugging starting point for similar grades
Solution
Start from this baseline and fine-tune according to the product; adjust mold temperature within the 80-100℃ range according to defect type; fix the process card after first piece confirmation; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
MPPO debugging has a baseline parameter table; start with rear 260, front 280, mold temperature 80-100; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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