Across
- 2. excess plastic that has pooled on the edge of the intended mold creating a sprue or plastic burr
- 4. surface depressions that occur when the inner material of a molded part shrinks more than the outer layers during cooling. Most common in thicker sections of parts such as around ribs, bosses, or corners.
- 6. foreign particles or substances that become trapped within the molded part during the injection process. Typically visible inside the plastic matrix and cannot be removed without damaging the part.
- 7. blockages or obstructions in the flow of molten plastics during the injection molding process resulting in incomplete filling, internal voids, or non-uniform material distribution. Can be observed when gluing process is performed on catheters. Also known as restricted flow
Down
- 1. inconsistencies in the color of the molded part, appearing as streaks, patches, or uneven color distribution. This defect indicates a color change from the intended shade.
- 3. material degradation by contaminants and/or process fluctuations outside of set parameters. Observed as an off-colored streaking along the surface of a molded part. A cosmetic defect, it is often silvery in color and is sometimes called ‘silver streak’
- 5. occur due to differential sink and/or temperature issues.