Precoated sand molding auxiliary mechanism capable of efficiently controlling material overflow

The invention provides a precoated sand molding auxiliary mechanism capable of efficiently controlling material overflow. The precoated sand molding auxiliary mechanism comprises a main body, wherein a fixed part is arranged inside the main body, and a spring mechanism is arranged inside the fixed part; and the upper end of the spring mechanism is fixedly connected with an induction air bag, the upper end of the induction air bag is provided with and connected with a pull rope, and the shaft end of the pull rope is fixedly connected with a movable part. According to the precoated sand molding auxiliary mechanism capable of efficiently controlling material overflow, through continuous adding of precoated sand and relative movement of movable gear baffles, a feeding port is closed so that the precoated sand cannot continuously enter, it is guaranteed that the situation that equipment in the main body operates in an overload mode due to excessive precoated sand is avoided, meanwhile, the equipment achieves the effect of avoiding the influence on steel casting caused by defects of castings caused by excessive addition of the precoated sand, the arrangement of the mechanism is beneficial to improving the molding effect of the castings, and meanwhile, the production efficiency of manufacturers is improved.