Molds & Tooling
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PVC Short Shot Troubleshooting
Problem Phenomenon
Thin-wall parts were underfilled, temperature-raising room was extremely small, and raising pressure approached flash
Cause Analysis
PVC's narrow window limits temperature-raising means; short shot is mainly solved by pressure and runner optimization; high viscosity makes thin-wall filling inherently difficult, and wall thickness below 2mm is high risk
Solution
①Design wall thickness not less than 2mm; ②increase injection pressure combined with enlarged gate; ③select high-flow grades for complex parts; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
The solution space for PVC short shot lies in pressure and structure; limited temperature means determines that design must come first; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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