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Welcome back to another episode of Toopus. Today, we will dive into the top 9 mistakes to avoid when designing injection-molded parts. Learn more at https://www.hollyplasticparts.com/plastic-injection-molding/
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26 JUL 2025 · Whether you're prototyping with a partner like Formioo or working with custom molding specialists such as https://www.hollyplasticparts.com/plastic-injection-molding/ , avoiding these mistakes can save time, cost, and hassle.Let’s break them down:1. Uneven Wall Thickness
Inconsistent walls cause warping and shrink marks. Keep them uniform where possible and use gradual transitions.2. Sharp Thickness Changes
Sudden shifts in thickness create stress points. Smooth out the geometry to help material flow better and avoid defects.3. C-Shaped Designs Without Support
Open "C" shapes often warp or deform. Use ribs or redesign to improve strength, especially when using glass-filled materials.4. Overusing Chamfers
Too many chamfers can hurt both function and tooling. Use them only where needed, for assembly or aesthetics.5. Poor Parting Line Placement
Bad placement can lead to flash and defects. Work with your molder to align parting lines with clean edges.6. No Draft Angles
Without a draft, parts stick in the mold. Add 1–2° draft to vertical walls to ensure smooth ejection.7. CAD File Issues
Sending improper CAD formats leads to delays. Use standard formats like STEP or Parasolid to avoid compatibility issues.These design missteps are easy to make, but also easy to avoid if you plan ahead.
Welcome back to another episode of Toopus. Today, we will dive into the top 9 mistakes to avoid when designing injection-molded parts. Learn more at https://www.hollyplasticparts.com/plastic-injection-molding/
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