Plastic injection defects troubleshooting guide: defect analysis

Defect	In-Depth click links below	QuickFix
Splay	Splay article	longer dry time, Lower barrel heats, slower filling(velocities), higher mold temp
Short/underfill	Short article	higher heats, more pressure, faster filling, slower end of fill
Sink	Sink Article	Higher pressure, larger shot, faster fill over affected area, longer cure time
Stringing	Stringing article	smaller nozzle tip, lower heats, increase decompression-after: position
gate blush	gate blush	raise cut-off, slower end of fill, lower heats
voids/bubbles	Voids Link	slower fill in affected area, lower/higher heats (barrel/mold), higher/lower pack
stress/cracking	cracking article	Lower pressure, faster fill in affected area,inspect for tooling issue,longer cure
drag marks	drag article	slower mold open, less pressure, inspect for tool damage
color swirls	color article	lower/higher heats, slower recovery, higher/lower back pressure
pin push marks	pin mark article	lower ejection pressure, slower ejection speed, more cure time, faster fill
flow lines	Flowline article	higher/lower cut-off, faster/slower velocities, higher/lower temperatures(barrel/mold)
burns	Burn article	slower fill affected area,lower barrel temp, higher mold temp,check water flow
jetting	jetting article	slower fill in affected area,higher mold temp
cold slug	cold slug article	increase decompression after position, slower beginning velocities, confirm tip size

Defect