Tire building drum

A tire building drum used to build a large green tire, comprising:

• a cylindrical drum main body having an outer peripheral surface, a diameter of the cylindrical drum main body being capable of being increased and reduced;
• and
• a coating formed on the outer peripheral surface of the drum main body, wherein
• the coating includes a silicon layer defining a surface of the coating, and
• the silicon layer has a surface roughness (Ra) of 10 μm or greater,
• wherein the coating includes a sprayed ceramic layer having a porous structure and impregnated with part of the silicon layer,
• wherein the coating includes a sprayed stainless steel layer having a surface roughness (Ra) of 16 μm or greater and fixedly adhering to the outer peripheral surface of the drum main body which is roughened, and
• the sprayed ceramic layer is formed on the sprayed stainless steel layer,
• wherein a thickness dimension of the silicon layer is within a range of 10 to 20 μm,
• a thickness dimension of the sprayed ceramic layer is within a range of 40 to 60 μm, and
• a thickness dimension of the sprayed stainless steel layer is within a range of 80 to 120 μm.