Mastering Sink Marks: Design, Mold, and Machine Solutions

Sink marks are a pervasive challenge in injection molding, marring product appearance and affecting functionality. This episode explores the root causes—from material and part design to mold and machine parameters—and outlines a comprehensive prevention strategy. Key Highlights: SINK MARK DEFINITION: Understand sink marks as surface depressions or shrink marks on plastic parts, severely impacting appearance and potentially affecting assembly. PART DESIGN IMPACT: Explore how uneven wall thickness, excessive rib or gate designs, and screw column placement contribute to sink marks. MOLD AND MACHINE: Learn how mold issues like insufficient cooling or gate size, and machine problems like low pressure or worn components, cause defects. PREVENTION IS KEY: Discover why addressing sink marks early in part design, with team collaboration and mold flow analysis, is most effective. 🔗 Read the Full Technical Guide: https://firstmold.com/tips/sink-marks/ 🛠️ Instant Quote for Your Project: https://firstmold.com/quote/ #FirstMold #Manufacturing #InjectionMolding #SinkMarks #PlasticDefects #ProductDesign #DFM