Select this checkbox if you want the Warp analysis to adjust constraint positions according to the mold shrinkage allowance.
In some industrial products such as automobiles, aircraft and home appliances, it is essential to meet tight dimensional tolerances after injection molded components are mounted into an assembly. Injection molding process-induced shrinkage and warpage may cause the manufactured part to deviate from the designed nominal shape and size. For flexible plastics part, force can be applied during assembly to bring the part connection points back to the nominal position. Sometimes injection molded components’ warpage problem can be eliminated once they are constrained in assemblies. On the other hand, the flat components can become distorted during the assembly due to an unexpected shrinkage magnitude from the injection molding process. Predicting the deformation and stress of injection molded components after being mounted into assemblies can be a valuable design tool for identifying assembly problem and optimizing the design.
Depending on the type of material to be injection molded, mold makers must take the material's shrink factor into consideration when producing the mold so that the process-induced shrinkage can be compensated. In practice, the material’s nominal shrinkage is normally used to scale up the cavity size. The scaled up model is often used for the injection molding simulation to check the final part design after shrinkage relative to the designed part dimensions and tolerances.
Turning on the option of "adjust constraint positions according to mold shrinkage allowance" will compute the final deformation of the injection molded part after being mounted into the assembly and its deviation from the part design. This option automatically adjusts the constraint positions according to the mold shrinkage allowance.
Note: If you use this option, you need to specify the mold shrinkage allowance.