Blog and guides
Practical, hands-on articles: process setting, calculation, materials, mold design and technology.
Causes of warpage and how to prevent it
If a part bends or twists after coming out of the mold, the usual places to look are wall thickness, cooling balance and material type. Causes and a practical solution order.
TroubleshootingShort shot: causes and the fastest solution order
If the cavity isn't filling completely, where should you look first? A field-tested check order, from no-cost to expensive.
TroubleshootingSink marks and voids: thick regions, ribs and holding
Two faces of the same problem: a dent on the surface or a void inside. Clues to tell them apart and the lasting design fix.
TroubleshootingWeld lines and air traps: where they form, how to reduce them
The line formed where melt fronts meet, and burning caused by trapped air: both are related to flow balance and venting.
TroubleshootingWhy does flash occur? A checklist from clamping force to mold wear
Plastic flowing out from the parting line is often not simply a matter of "not enough tonnage." How to tell the causes apart.