Processing Machinery
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PMMA Surface Hardness and Scratches
Problem Phenomenon
Product surfaces are easily scratched during assembly and use, affecting transparent appearance.
Cause Analysis
PMMA surface hardness is higher than most plastics but still lower than glass, and frictional contact produces scratches; surfaces with high internal stress show scratches more easily.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Select scratch-resistant SR grades or hard coatings; ②standardize handling protection; ③reduce internal stress; ④polish to repair minor scratches.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
Scratch protection relies on matching material and process; hard coatings are a common solution for high-contact scenarios, and internal stress management also helps.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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