Automatic sub-packaging machine for RST (road science technology)

The utility model provides an automatic sub-packaging machine for RST (road science technology). The automatic sub-packaging machine comprises a material conveying device and a material weighing device, wherein the material conveying device comprises a feeding hole and a discharging hole; the material weighing device comprises a hopper, a material inductor, a material weigher and a discharging hole; an opening of the hopper is communicated with the discharging hole of the material conveying device; the material inductor is arranged at a lower part of the hopper; the material weigher is arranged below the hopper, an inlet of the material weigher is provided with a first electromagnetic valve, and an outlet of the material weigher is provided with a second electromagnetic valve; the first electromagnetic valve is electrically connected with the material inductor, the material inductor controls the first electromagnetic valve to be opened when inducing that materials exist in the hopper, and the inlet of the material weigher is communicated with an outlet of the hopper; the second electromagnetic valve is electrically connected with the first electromagnetic valve, the first electromagnetic valve controls the second electromagnetic valve to be opened, and the outlet of the material weigher is communicated with the discharging hole of the material weighing device. The automatic sub-packaging machine can realize automatic small bag sub-packaging of the materials and also can perform automatic grinding and bag-overturning operations, thereby greatly improving the working efficiency.