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.
Brake Drums. Drum brakes were standard equipment on cars and trucks for decades, then in the 1970s they were relegated to the rear axle by front disc brakes. Today most vehicles have four wheel disc brakes, but drum brakes are still used at the rear on many trucks and non-performance cars.