Common Injection Molding Defects
Short Shots
Insufficient material fills the cavity. Solutions: Increase injection pressure, raise melt temperature, check for leaks.
Sink Marks
Visible depressions on thick sections. Solutions: Increase packing pressure, adjust cooling time, reduce wall thickness variation.
Flash
Excess material escapes the cavity. Solutions: Reduce injection pressure, repair worn molds, check clamp force.
Warpage
Uneven cooling causes distortion. Solutions: Uniform cooling, symmetric wall design, post-mold annealing.
Surface Streaks
Flow lines visible on surface. Solutions: Increase melt temperature, modify gate location, improve venting.
