With the unceasing development of automobile industry both at home and abroad, it has higher requirement to the quality of automobile tyre and high quality tyre mould. Based on the principle of high jumping-off point, high investment and high benefit, the company had introduced plenty of NC equipment. During the period of mould making, the mould is made through NC turning, adapting electric spark to form pattern and NC lettering. Therefore it discards handcrafting and avoids the limitations such as un-smoothness of tyre surface and un-roundness of pattern curved surface, etc. It makes that the quality of mould has material improvement. The Max rotating diameter of electric spark forming machine introduced by the company may be 2.4m.