Intermittent sand blasting machine

The intermittent sand blasting machine comprises a discharging box, an inclined plate is fixed to one side of the top of the discharging box, a rotating shaft is rotationally installed on the inner side wall of the middle of the discharging box, a sieve plate is rotationally installed on one side of the rotating shaft, and one side of the sieve plate is rotationally installed in the discharging box through the rotating shaft. During screening, a first motor is started through an external controller, the first motor rotates when being started, the rotating first motor drives a ring disc to rotate, when the ring disc rotates, a steel wire rope is driven by a connecting shaft to enable a pulling plate to continuously swing up and down, a screening plate swings along a rotating shaft at an angle, and therefore large particles are screened out, and the screening effect is achieved; during intermittent feeding, the sand blasting machine body and the second motor are started at the same time through an external cont