Material Drying
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PCABS Silver Streaks from Three Gases
Problem Phenomenon
PC/ABS silver streaks (water splash and material streaks) are caused by interference from three gases: air, moisture, and cracked gas.
Cause Analysis
PC/ABS silver streaks are the most common problem; gas interference has three components: air entrained during melt injection, moisture in the material itself, and cracked gas from high-temperature hydrolysis/thermal decomposition; related to mold venting; both drying and process are involved.
Solution
①First check that drying is sufficient; ②after confirming drying, adjust the '2079851475616104452 process; ③check mold venting; ④troubleshoot the three types of gases separately; ⑤solve comprehensively.; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
The three-gas causes of PCABS silver streaks must be systematically investigated; drying is the first priority; venting and process are equally important.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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