Post-curving

Post curing is the process of exposing a part or mold to elevated temperatures to speed up the curing process and to maximize some of the material’s physical properties.
After a full cure is achieved at room temperature, post curing will have no effect on the material's properties.
Post curing will expedite the cross-linking process and properly align the polymer's molecules. Much like tempering steel, post curing thermosets can increase physical properties (e.g., tensile strength, flexural strength, and heat distortion temperature) above what the material would normally achieve at room temperature.

Reference
1. http://www.hapcoweb.com/faqs_postcure.htm