Feeding device for pre-foaming machine

The utility model relates to the field of foam production equipment, and discloses a feeding device for a pre-foaming machine, which comprises a pre-foaming machine feeding hopper and a screw conveyer, a feeding port and a discharging port are arranged on the screw conveyer, a discharging cover is arranged between the discharging port and the pre-foaming machine feeding hopper, and a vibration net is arranged in the discharging cover. The polystyrene raw material particle crushing device has the following advantages and effects that polystyrene raw material particles are conveyed through the spiral conveyor, the falling polystyrene raw material particles are crushed through the vibration net arranged below the discharge port of the spiral conveyor, and the polystyrene raw material particles are crushed before entering the feed hopper, so that raw material caking is reduced; and the vibration spring is arranged between the vibration net and the supporting frame, so that the contact stability of the vibration n