24 Defect Types

Injection Molding Defect Guide

Causes and solutions for 24 major injection molding defect types.

Fill & Pack

Fill & Pack

4 types
Short Shot
Flash
Sink Mark
Void/Bubble

Surface & Flow

Surface & Flow

6 types
Weld Line
Jetting
Flow Mark
Tiger Stripe
Gate Blush
Surface Roughness

Heat · Gas · Contamination

Heat · Gas · Contamination

6 types
Burn Mark
Silver Streak
Discoloration
Black Specks
Color Streaks
Stringing/Drooling

Strength & Structure

Strength & Structure

4 types
Crack
Warpage
Delamination
Brittleness

Mold · Ejection · Dimension

Mold · Ejection · Dimension

4 types
Ejector Marks
Mold Deposit (Plate-Out)
Sticking
Dimensional Instability