Apparatus for reclamation of molding sand

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.