Injection Molding Touble Shooting
Problems Water Mark Streak Flash Weld Line Poor Surface Unfilled Burn Color Problem Deform Thick Crack
Possible Reason
Low Barrel Temp
High Barrel Temp
High Injection Pressure
Low Injection Pressure
Short Packing Time
Long Packing Time
High Injection Speed
Low Injection Speed
Poor Cooling
Poor Mold Temp Control
Long Cycle
Short Cycle
Big Runner Or Sprue
Small Runner Or Sprue
Poor Gate Position
Low Clamping Force
Poor Venting
Insufficient Feeding
Improperdrying Time And Temp
Foreign Material
Poor Clean
Improper Releasing Agent
Slow Flowing
Quick Flowing

water mark

unfilled

flash

 burn

silver streak

weld line

 burn