Patent ID: 8128012

Claim:
An apparatus for the reclamation of molding sand comprising: a part for feeding molding sand, which part has a sand falling port at a bottom of the part for feeding the molding sand; a rotary drum disposed below the part for feeding the molding sand and being rotatable horizontally; a motor driving means for rotating the rotary drum; a roller disposed in the rotary drum and spaced apart therefrom, and a cylinder connected to the roller that presses the roller toward the rotary drum; a flow detector for the sand disposed at the sand falling port of the part for feeding the molding sand for detecting a flow of the sand fed into the rotary drum; a current detector for detecting current of the motor driving means; a pressure controller for controlling a pressure of the cylinder; and a controller for controlling a force of the cylinder pressing the roller based on the flow of the sand detected by the flow detector for the sand, wherein the controller comprises: a calculating part for calculating a desired current of the motor driving means required for reclamation of the sand based on the flow of the sand detected by the flow detector for the sand; a comparing part for comparing the current of the operating motor that is measured to the desired current corresponding to the flow of the sand; and a controlling part for adjusting the pressure of the roller caused by the cylinder to shift the current of the operating motor closer to the desired current based on a comparison of the comparing part.