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How to Fix Cloudy, Mottled Marks Near the Gate in Injection Molding Cloudy, mottled marks appearing near the gate are among the most common and frustrating injection molding surface defects. They ruin part aesthetics, increase scrap rates, and often stall production while…
Alex Yu
Sep 24 2026
Spuitgieten
Why Do Flow Mark Defects Happen in Injection Molding?
Why Do Flow Mark Defects Happen in Injection Molding? Do wavy lines ruin the look of your Injection Molding parts? These ugly marks cause high scrap rates. We will show you how to fix and prevent this costly defect. Flow marks are…
Alex Yu
Sep 02 2026
Gietmatrijzen
Injection Molding Surface Defects: Root Causes & Practical Solutions from Mold Design and Process Engineering
Introduction Surface defects in injection-molded parts are not merely aesthetic concerns—they often reflect deeper issues in melt flow behavior[^1], thermal management[^2], or mold geometry[^3]. Common visible flaws include: Dark spots (halo effect) near gates Gloss inconsistency or haze zones Surface wrinkling, commonly…
Alex Yu
28 februari 2026
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