To create the bell, a sheet of brass is cut according to a pattern and then the edges are welded to form a bell-shaped circle. The shape is carefully refined into an elegant curve by placing it over an iron form and pounding it with a wooden mallet. If a metal hammer is used, the brass will be stretched and flattened, becoming increasingly thin, affecting the consistency of the tone.
形塑吹頭時，要將銅片依照版型裁剪好，焊接後套在喇叭型的鐵模上，接著以木槌精細敲打，讓銅片彎曲成形，若以鐵鎚敲打，銅片會產生延展、越打越薄，使得音色不勻。