Mold-making device and mold-making method

A mold-making device comprising:

• a stirring device including a stirring tank and a plurality of stirring blades, the stirring blades having a rotating drive shaft in a vertical direction, wherein the stirring device further includes a packing port that is configured to open and close on a bottom of the stirring tank, and wherein the stirring device stirs a particulate aggregate and at least one additive by rotating the plurality of stirring blades within the stirring tank to yield an admixture, the stirring blades being then raised along an axial direction of the rotating drive shaft so as to be pulled out from the admixture and removed above the stirring tank;
• a forming mold that communicates with the packing port of the stirring tank and molds the admixture into a predetermined shape;
• and
• a packing device configured to compress a surface of the admixture within the stirring tank and pack the admixture into the forming mold;
• wherein each stirring blade of the plurality of stirring blades is configured in a substantially planar lattice pattern.

A sand mold-making device comprising:

• a stirring device including a stirring tank and at least one stirring blade, the at least one stirring blade having a rotating drive shaft in a vertical direction, wherein the stirring device further includes a packing port that is configured to open and close on a bottom of the stirring tank, and wherein the stirring device stirs a particulate aggregate and at least one additive by rotating the at least one stirring blade within the stirring tank to yield an admixture, the at least one stirring blade being then raised along an axial direction of the rotating drive shaft so as to be pulled out from the admixture and removed above the stirring tank;
• a forming mold that communicates with the packing port of the stirring tank and molds the admixture into a predetermined shape;
• and
• a sand packing device configured to compress a surface of the admixture within the stirring tank and pack the admixture into the forming mold via the packing port;
• wherein the at least one stirring blade at a top edge is secured to a distal end of a rotating drive shaft.

A mold-making method comprising:

• introducing a particulate aggregate and at least one additive into a stirring tank in a state in which a packing port disposed on a bottom of the stirring tank is closed, and stirring the particulate aggregate and the at least one additive by rotating at least one stirring blade to yield an admixture, the at least one stirring blade having a rotating drive shaft in a vertical direction;
• raising the at least one stirring blade along an axial direction of the rotating drive shaft so as to be pulled out from the admixture and removed above the stirring tank, and coupling the packing port disposed on the bottom of the stirring tank with a forming mold so that the packing port and the forming mold are in communication with each other and then opening the packing port;
• and
• compressing a surface of the admixture within the stirring tank and packing the admixture into the forming mold via the packing port to mold the admixture into a predetermined shape;
• wherein at least one scraper for smoothing out the surface of the admixture is arranged on a bottom of the at least one stirring blade;
• and
• wherein raising the at least one stirring blade includes rotating the at least one stirring blade together with the at least one scraper in a circumferential direction of the rotating drive shaft while being pulled out and removed from the admixture such that the at least one scraper smooths out the surface of the admixture.

A mold-making method comprising:

• introducing a particulate aggregate and an additive into a stirring tank in a state in which a packing port disposed on a bottom of the stirring tank is closed, and stirring the particulate aggregate and the additive by rotating a plurality of stirring blades to yield an admixture, the plurality of stirring blades having a rotating drive shaft in a vertical direction;
• raising the plurality of stirring blades along an axial direction of the rotating drive shaft so as to be pulled out from the admixture and removed above the stirring tank, and coupling the packing port on the bottom of the stirring tank with a forming mold and opening the packing port when the packing port and the forming mold are in communication with each other;
• and
• compressing a surface of the admixture within the stirring tank and packing the admixture into the forming mold via the packing port to mold the admixture into a predetermined shape;
• wherein the particulate aggregate and the additive are stirred via the plurality of stirring blades, and wherein each stirring blade of the plurality of stirring blades is configured in a substantially planar lattice pattern.

A sand mold-making method comprising:

• introducing a particulate aggregate and an additive into a stirring tank in a state in which a packing port disposed on a bottom of the stirring tank is closed, and stirring the particulate aggregate and the additive by rotating at least one stirring blade to yield an admixture, the at least one stirring blade having a rotating drive shaft in a vertical direction;
• raising the at least one stirring blade along an axial direction of the rotating drive shaft so as to be pulled out from the admixture and removed above the stirring tank, and coupling the packing port on the bottom of the stirring tank with a forming mold, and opening the packing port when the packing port and the forming mold are in communication with one another;
• and
• compressing a surface of the admixture within the stirring tank and packing the admixture into the forming mold via the packing port to mold the admixture into a predetermined shape;
• wherein the particulate aggregate and the additive are stirred by the at least one stirring blade via a rotating drive shaft attached at a distal end to a top edge of the at least one stirring blade, and wherein the particulate aggregate includes sand.