The utility model relates to a feeding and weighing device for production of
polystyrene white balls, which effectively solves the problem of larger error caused by feeding
impact of a weighing device. According to the technical scheme, the device comprises a charging
barrel and a bearing plate, the charging
barrel is supported on the bearing plate, a weighing device is arranged between the charging
barrel and the bearing plate and can weigh the total weight of the charging barrel and materials in the charging barrel, the lower end of the charging barrel is connected with a discharging
pipe, a first
auger is arranged in the discharging
pipe, a feeding
pipe and a returning pipe are arranged above the charging barrel, the feeding pipe is connected with a stock bin, and the returning pipe is connected with a discharging pipe. A second
auger is arranged in the feed pipe, the lower end of the return pipe extends into the bottom of the charging barrel, and a third
auger is arranged in the return pipe; the device further comprises a controller, and the controller receives weight signals of the weighing device and controls starting and stopping of the augers according to the weight signals. According to the utility model, a mode of redundant feeding and returning to a preset value is adopted, so that weighing errors caused by feeding
impact are avoided, and materials with
target weight can be weighed more accurately.