POOR GATES ('FISH EYES', FLASH, TAILS)

Insufficient pack and hold pressure and/or time. • Increase pack time. • Increase cure time. • Increase hold pressure. • Increase screw recovery time. • Increase decompression time (drool and tails). • Reduce decompression time (fish eyes). Improper bottom thickness • Increase material on parison bottom (fish eyes and holes only). • Limit material on parison bottom (tails only). • Increase the temperature in bottom of parison mold (tails). Improper mold, manifold, or core rod • Reduce parison mold temperature in gate area. Temperatures • Reduce manifold temperature (fish eyes). • Increase manifold temperature (tails). • Improve external tip cooling (fish eyes). Possible Causes Possible Solutions