injection molding surface defects - Custom Plastic Injection Molding | High Precision Parts & Mold Design

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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

24. September 2026

Spritzgießen

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

Oberflächenfehler beim Spritzgießen: Ursachen und praktische Lösungen aus den Bereichen Formenkonstruktion und Prozess...

Spritzgussformenbau

Oberflächenfehler beim Spritzgießen: Ursachen und praktische Lösungen aus den Bereichen Formenkonstruktion und Verfahrenstechnik

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…

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Oberflächenveredelung

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