Molds & Tooling
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PMMA Mold Surface Poor Replication
Problem Phenomenon
Product surface is hazy and lacks gloss, consistent with corresponding positions on the cavity surface, and improves after mold polishing.
Cause Analysis
PMMA has high transparency, and any microscopic defect of the mold is replicated onto the product; cavity scratches, dirt buildup or insufficient polishing grade directly manifest as surface haze.; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.
Solution
①Mirror-polish the cavity to SPI A1 grade; ②regularly clean the mold surface; ③repair scratches; ④keep mold temperature stable to improve replication.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Key Takeaway
The surface condition of the PMMA mold determines the optical quality of the product; mirror polishing and clean maintenance are the basic investment for transparent part production.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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