• Sink marks — insufficient packing time/pressure, thick sections, high melt temperature.
• Flash — clamp force too low, injection speed/pressure too high, worn parting line.
• Short shots — venting, material shortage, injection speed too slow, melt temp too low.
• Silver streaks / splay — moisture in resin, degraded material, excessive shear.
• Warpage — differential shrinkage, non-uniform cooling, residual stress, unbalanced packing.
• Burn marks / dieseling — trapped air, poor venting, too-fast fill.
• Weld lines weak or visible — melt/fill temperature too low, merge angle, venting at junction.

Post your specific case with machine data and we will dig in.

• Machine / system type — press, power unit, mobile circuit, etc.
• Symptom — what exactly happens, when, and since when.
• Fluid — ISO grade, condition, recent changes.
• Pressures & temperatures — gauge readings at rest and under load.
• What you already checked or replaced.
• Photos of the circuit, gauges or the failed component (no confidential drawings).

Good questions get expert answers fast. Vague questions get guesses.

Ask specific questions, read the Community Rules, introduce yourself, and be generous sharing what you know. We are glad you are here.

— The MFG Atlas Team