Curing is a term in polymer chemistry and process engineering that refers to the toughening or hardening of a polymer material by cross-linking of polymer chains, brought about by electron beams, heat or chemical additives.esin curing [edit]. Despite the wide variety of thermoset resin formulations (epoxy, vinylester, polyester, etc.), their cure behavior is qualitatively identical.
The brake drum mounts on the axle or wheel hub, and some drums incorporate the hub. Most brake drums are made of solid cast iron, but there are also steel and aluminum drums with cast iron liners. The machined friction surface on all drums is cast iron.
These parts are essential in making sure that the brakes work properly. The brake drums rotate around the brake shoes. Each time you hit your car's brake pedals, the piston moves the brake shoes toward the brake drum's inner surface. The entire assembly also uses springs, which squeeze the brake shoes against the drums. These springs also enable the shoes to pull out when you release the brake pedals. However, constant usage will eventually wear out the brake drum. As the brake drum's surface thins out, the braking capacity of your vehicle lessens.