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Home E-books & Guides eBook: Injection Molding Design Guidelines and Best Practices
26 March 2025
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eBook: Injection Molding Design Guidelines and Best Practices

This guide distills key principles of injection molding design—from material selection and surface finishes to draft angles, ribs, and snap-fits. It also covers common defects and how to avoid them, helping you create reliable, cost-effective plastic parts with confidence.


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    Guide Content

    • Introduction to Injection Molding
    • Material Selection
    • Surface Finishes & Textures
      • SPI Surface Finishes
      • VDI Surface Finishes
      • Mold-Tech Textured Finishes
    • Injection Molding Design Guidelines
      • Draft Angles
      • Wall Thickness
      • Radii and Fillets
      • Bosses, Ribs & Gussets
      • Living Hinges
      • Snap-Fits
      • Texts & Symbols
      • Gate Design
      • Dealing with Undercuts
      • Plastic Part Tolerances
    • Common Defects & How to Prevent Them
      • Warping
      • Sink Marks
      • Knit Lines
      • Drag Marks
      • Splay
    • Injection Molding in Action
    • Injection Molding With Xometry
    • Additional Resources
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