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.
Bass drums can have a variety of strikers depending on the music: 1  A single heavy felt covered mallet (Fr. 2  When the drum is mounted vertically, the mallet above may be held in one hand and a rute held in the other. 3  2 matching bass drum mallets or a double headed mallet are used for playing drum rolls. When used as part of a drum kit, a variation of the mallet described above is mounted on a pedal and called a beater.