Processing Machinery
3 조회수
PMMA Storage Deformation
문제 현상
Sheets warp and deform after being stored for a period of time, especially large-size thin sheets
원인 분석
PMMA has a large thermal expansion coefficient and sheets have residual stress; improper storage support and temperature fluctuations accumulate deformation; unclamped sheets shrink at forming temperature
해결 방법
①Store sheets flat with uniform support; ②stable storage environment temperature; ③check flatness of large sheets before use and anneal when necessary; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
핵심 요약
PMMA sheet storage is flatness management; uniform support plus stable temperature prevents deformation before it happens; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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