Part warpage is the deformation of the part after ejection during the injection molding process.
It is a regular topic in the injection molding process in particular when molded parts have to reach a specific range of tolerances.
The part deformation is due to internal stresses acting on the part due to uneven shrinkage and mechanical forces during the ejection.
The importance of performing simulations is to detect it before the mold manufacture, saving time and important cost of mold rework.
There are multiple causes of part warpage:
– Unsuitable processing parameters
– Part design issue
– Mold issue (uneven cooling, gate location and gate size, ejection system)
– Unsuitable choice of part material
– Issue with the injection molding machine.
Working through those aspects using simulations help to solve quickly and effectively part warpage in order to produce a part inside the range of manufacturing tolerances.