Explore common injection molding defects, including flash, sink marks, short shots, warpage, weld lines, and voids. Learn their causes, how to identify them, and practical solutions for improving part quality, mold performance, and production consistency.
During injection molding, black or brown burn marks may sometimes appear on the surface of plastic parts. These defects not only [...]
Warpage is a common dimensional defect in injection molding. It usually appears as bending, twisting, lifted corners, or a part that [...]
Injection molding sink marks are localized depressions on the surface of a molded part. They most often appear near ribs, screw [...]
What Is Flash in Injection Molding? Flash occurs when molten plastic escapes from the mold cavity and flows into small gaps [...]
Although injection molding defects may appear to have many different “symptoms,” they generally relate to four core variables: material condition (drying/contamination/degradation), [...]
Injection molding defects can often result from the material itself or how the manufacturer stores and processes the material prior to [...]
In the process of injection molding problems will also affect the quality of the product itself. The following defects usually occur: [...]
Making injection molded prototypes is both an art and a science. A high level of technical expertise and attention to detail [...]
