Material Analysis
11 조회수
Treatment of PA12 SLS Unsintered Powder
문제 현상
【Problem phenomenon】About 70% of the powder in each furnace was unsintered, and direct reuse had poor fluidity affecting powder spreading quality
원인 분석
Unsintered powder undergoes long-term thermal stress and its fluidity is damaged, and repeated reuse makes quality uncontrollable; research shows that chemical additives can be used to break amide bonds and directionally restore fluidity, achieving powder regeneration
해결 방법
Establish an evaluation of the degree of powder thermal aging; blend powder with poor fluidity with new powder in proportion or treat it with chemical regeneration; include powder spreading quality in the first-layer inspection of each furnace; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
70% unsintered powder is the bulk of the cost, and fluidity evaluation determines the reuse method; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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