This utility model relates to an automatic sandblasting device for a sandblasting
machine, comprising a housing and a working platform, with a frame mounted on the working platform. Multiple sandblasting components are mounted on the frame, which also has a feeding channel. Each sandblasting component includes a first air blowing component and a second air blowing component, sequentially arranged on the frame along the
conveyor belt's running direction. The first air blowing component includes a first fixed
nozzle plate and multiple first universal adjustable nozzles. The second air blowing component includes a
pneumatic motor fixed to the frame, a second fixed
nozzle plate fixed to the output end of the
pneumatic motor, and multiple second universal adjustable nozzles mounted on the second fixed
nozzle plate and capable of omnidirectional rotation. Each first universal adjustable nozzle blasts the blind holes of each product in the feeding tray of the feeding channel, while each second universal adjustable nozzle blasts the surface of each product through the
pneumatic motor driving the second fixed nozzle plate. This utility model features an ingenious structure and is convenient and practical.