Back -up sand machine of core making machine

The utility model provides a back -up sand machine of core making machine, control switch, back -up sand device and continuous sand device on the support frame are installed to a support frame, wherein, the back -up sand device includes: install and drive actuating cylinder at the second of support frame lower extreme, articulate actuating arm on the second drives the actuating cylinder telescopic link, articulate back -up sand fill on the actuating arm, install the first actuating cylinder of driving on the back -up sand is fought, install the several back -up sand pipe in back -up sand fill bottom, continuous sand device includes: install at the continuous sand hopper of support frame upper end, install that third on continuous sand hopper drives actuating cylinder, articulates the open -close plate on the third drives the actuating cylinder telescopic link, the several of installing in continuous sand hopper bottom continues the sandpipe, control switch drives with power and second respectively that actuat