Extrusion & Post
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PPO Extrusion Die Land
Problembeschreibung
【Problem Phenomenon】PPO extruded profiles have poor surface quality and unstable dimensions
Ursachenanalyse
PPO extrusion should have a relatively long die land to stabilize melt shaping; when the land is insufficient, the melt orients and rebounds after exiting the die, and surface and dimensions go out of control; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Lösung
Design the die with sufficient land length; precisely control die temperature; match haul-off speed with extrusion output; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Wichtigste Erkenntnis
The PPO die land is quality insurance for profiles; if too short, surface and dimensions both go out of control; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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