Splay (silver streaking)

Suggested Corrective Actions

Machine

  • Change to shorter nozzle.
  • Check for water source near hopper.
  • Check nozzle for burr or partial blockage.
  • Correct excessive melt decompress.
  • Increase back pressure.
  • Insure that nozzle is properly seated against sprue bushing.
  • Lower nozzle temperature.
  • Lower screw RPMs.
  • Move mold to machine with smaller cylinder.
  • Open gates or increase number or gates.
  • Reduce injection speed.
  • Reduce material melt temperature.

Material

  • Dry material before use.
  • Install fresh desiccant in material drier.
  • Reduce regrind level.

Mold

  • Check for water leak in mold.
  • Open sprue, runners, gates, or vents.