Mold preheating system and mold preheating device

Abstract

A mold preheating system includes a casting mold for obtaining a cast metal product by supplying molten metal to a cavity formed by an upper mold and a lower mold, a melting furnace provided below the lower mold, a molten metal supply path through which molten metal in the melting furnace is supplied to the cavity, and a mold preheating device configured to preheat the casting mold. A raised part that forms a product shape is formed in the upper mold, and a recessed part in which the raised part is housed is formed in the lower mold. The mold preheating device includes an upper-mold preheating burner that is disposed along an outer peripheral wall of the raised part and preheats the outer peripheral wall, and a lower-mold preheating burner that is disposed inside the recessed part and preheats a sidewall and a bottom wall of the recessed part.

1 . A mold preheating system comprising:
 a casting mold for obtaining a cast metal product by supplying molten metal to a cavity formed by an upper mold and a lower mold;   a melting furnace provided below the lower mold;   a molten metal supply path through which molten metal in the melting furnace is supplied to the cavity; and   a mold preheating device configured to preheat the casting mold, wherein   a raised part that forms a product shape is formed in the upper mold,   a recessed part in which the raised part is housed is formed in the lower mold, and   the mold preheating device includes an upper-mold preheating burner that is disposed along an outer peripheral wall of the raised part and preheats the outer peripheral wall, and a lower-mold preheating burner that is disposed inside the recessed part and preheats a sidewall and a bottom wall of the recessed part.   
     
     
         2 . The mold preheating system according to  claim 1 , wherein the upper-mold preheating burner includes an upper-mold pipe surrounding the outer peripheral wall of the raised part, and a burner chip that ejects flame from the upper-mold pipe toward a corner positioned between the outer peripheral wall of the raised part and a lower end surface of the upper mold. 
     
     
         3 . The mold preheating system according to  claim 1 , wherein
 the lower mold includes a plurality of sprues communicating with the molten metal supply path,   the molten metal supply path includes an intermediate stalk through which the molten metal is distributed to the plurality of sprues,   the mold preheating device further includes intermediate-stalk preheating burners inserted into the intermediate stalk through the plurality of sprues, and   the intermediate-stalk preheating burners eject flame along an inner peripheral wall of the intermediate stalk.   
     
     
         4 . The mold preheating system according to  claim 3 , wherein the intermediate-stalk preheating burners are inserted into the intermediate stalk except for at least one of the plurality of sprues. 
     
     
         5 . The mold preheating system according to  claim 3 , further comprising:
 a mixture supply device configured to supply mixture of air and gas;   a mold pipe through which the mixture is supplied from the mixture supply device to the upper-mold and lower-mold preheating burners; and   an intermediate-stalk pipe through which the mixture is supplied from the mixture supply device to the intermediate-stalk preheating burners,   wherein the intermediate-stalk pipe has a path different from the mold pipe.   
     
     
         6 . A mold preheating device configured to preheat a casting mold for obtaining a cast metal product by supplying molten metal from a melting furnace through a molten metal supply path into a cavity formed by an upper mold in which a raised part is formed and a lower mold in which a recessed part is formed, the melting furnace being provided below the lower mold, the raised part being housed in the recessed part to form a product shape, the mold preheating device comprising:
 an upper-mold preheating burner that is disposed along an outer peripheral wall of the raised part and preheats the outer peripheral wall; and   a lower-mold preheating burner that is disposed inside the recessed part and preheats a sidewall and a bottom wall of the recessed part.   
     
     
         7 . The mold preheating device according to  claim 6 , wherein
 the lower mold includes a plurality of sprues communicating with the molten metal supply path,   the molten metal supply path includes an intermediate stalk through which the molten metal is distributed to the plurality of sprues,   the mold preheating device further includes intermediate-stalk preheating burners inserted into the intermediate stalk through the plurality of sprues, and   the intermediate-stalk preheating burners eject flame along an inner peripheral wall of the intermediate stalk.