Synthetic resin bend pipe forming machine

The utility model relates to an improved electric chest of a zipper forming machine. The electric chest is provided with a chest body which is designed upright, wherein, one side of the chest body is provided with an operating panel, and the other side of the chest body is formed with an opening and provided with a maintenance lid which can be opened and closed; the inner side of the maintenance lid is fixed with a circuit board, and the maintenance lid can be opened outward to turn the circuit board outside the chest body, so that the circuit board arranged on the maintenance lid is conveniently maintained. In addition, the electric chest can be directly fixed on a top board of a machine table of a zipper forming machine, and the arrangement of a neck seat is omitted so as to effectively reduce vibration.