Short Shots - Custom Plastic Injection Molding | High Precision Parts & Mold Design

Injection Molding Short Shots: 13 Causes of Poor Venting & Filling Defects (Expert Troubleshooting Guide)

Introduction In injection molding, few defects are as frustrating or costly as short shots (underfilling) caused by poor venting. When trapped air creates backpressure exceeding the injection pressure, molten plastic simply cannot fill the cavity. But poor venting is rarely the sole…

Alex Yu

Aug 07 2026

Spritzgießen

4 Common Injection Molding Defects & Proven Solutions

Injection molding is a highly precise manufacturing process, but it is not immune to production challenges. Whether you are a process engineer or a quality control manager, encountering defects can lead to costly downtime and material waste. In this comprehensive guide, we…

Alex Yu

10. Juli 2026

Spritzgießen

12 ultimative Lösungen zur Beseitigung von Kurzschlüssen beim Spritzgießen

Short shots (also known as underfills) occur when the molten plastic fails to completely fill the mold cavity, resulting in an incomplete part. This defect typically appears in thin-walled sections or areas farthest from the gate. > Pro Tip: For internal features…

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