Fix Ejector Pin Mark Issues in Your Injection Mold | Nanoplas
Fix Ejector Pin Mark Issues in Your Injection Mold | Nanoplas
Jun 28, 2019
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All is Not Sunk: How to Deal with Sink Marks in an Injection-Molded Part - Engineers Rule
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Alpine Mold on Instagram: "What causes ejector stress marks on injection-molded parts? 🔍 These marks show up as bright spots, dull patches, or shadow-like traces right opposite an ejector pin or lifter. They happen when the ejector takes too much force or has excessive clearance, causing vibration and local overheating of the melt. Here’s how to fix it: ✅ Add cooling around the ejector area ✅ Improve machining accuracy of ejector holes ✅ Reduce holding pressure time ✅ Extend cooling time to low
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