The invention relates to a quantitative feeding device for
casting. The quantitative feeding device comprises a
material storage bin, a supporting frame and a
cantilever; the quantitative feeding device is characterized in that the
material storage bin is fixed to the
cantilever, the
cantilever is arranged on the supporting frame, a balancing weight is arranged on the other side of the supporting frame, an
infrared sensor is arranged on the supporting frame, and the discharging direction of the
material storage bin and the detecting direction of the
infrared sensor are located in one plane; and a lifting type plug stick is arranged in the material storage bin and connected with a lifting type plug stick driving mechanism located on the cantilever. The quantitative feeding device has the beneficial effects that when molten iron flows through a detecting position of the
infrared sensor, a PLC drives the lifting type plug stick to upwards move, the material storage bin is opened, automatic feeding is achieved, and conversely, feeding is stopped; through the feeding process synchronous to
metal liquid, the material adding time and the stability of adding amount of materials are guaranteed, operation of quantitative feeding in the pouring process is achieved,
instability of manual operation and other interference factors are avoided, the operation stability is improved, operation risks are reduced, and the controllable operation process is achieved.