JP2019166528A - Shell mold die, and method for producing casting using the same - Google Patents

Abstract

To provide a shell mold die capable of securely performing directional solidification, and a method for producing a casting using the shell mold die.SOLUTION: A shell mold die 1 comprises: a shell mold lower die 3 provided with a recessed part 3a; a shell mold upper die 5; and a shell core 7 provided with a hollow part 7a. The shell mold lower die 3 is arranged at the side in which the hollow part 7a is located to the shell core 7. The shell mold upper die 5 is arranged at the side opposite to the side in which the hollow part 7a is located to the shell core 7. A cavity 9 is formed among the shell mold upper die 5, shell mold lower die 3 and shell core 7. A chiller 11 as an endothermic part is arranged at a region including the hollow part 7a formed between the shell mold lower die 3 and the shell core 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shell mold mold and a method for manufacturing a cast product using the same, and more particularly to a shell mold mold having a cooling structure and a method for manufacturing a cast product using the shell mold mold.

  When casting a casting, it is known that shrinkage cavities tend to occur in the thick part of the mold due to solidification and shrinkage of the molten metal. In order to prevent the occurrence of shrinkage nests, the mold is basically designed by a casting method called a runner system installation position or a feeder.

  However, it is difficult to obtain the effect of the runner system or the hot water at the thick portion inside the mold. For this reason, countermeasures against shrinkage nests by a chiller are performed at the thick part of the mold. In the conventional molding method, it is possible to embed in the sand mold by covering the sand with the chiller set on the model.

  Further, Patent Document 1 proposes a method of directional solidification of molten metal in order to prevent shrinkage. In directional solidification, solidification of the molten metal is started from the tip of the casting, and the molten metal is solidified toward the molten metal side while the molten metal is replenished with respect to volume shrinkage due to solidification from the molten metal side. Thereby, volume shrinkage is compensated until solidification is completed, and shrinkage is prevented. In the technique proposed in Patent Document 1, a mold provided with a plurality of cooling pipes for local cooling is used. Sequence control is performed so that cooling air is sequentially sent to each cooling pipe along the direction in which the molten metal is directionally solidified.

Japanese Patent Laid-Open No. 04-274863

  When a shell mold mold is used as the mold, the chiller is likely to be misaligned when performing the operation of blowing foundry sand into the mold. Therefore, it is difficult to embed the chiller at a desired position. Further, the cooling pipe is likely to be misaligned during the operation of blowing the foundry sand into the mold. In particular, in a shell mold mold using a shell core that forms a hollow portion or the like, it is difficult to embed a chiller, and it is difficult to solidify the molten metal with directivity. Thus, in the shell mold mold, there is a problem that it is difficult to cause directional solidification in order to prevent shrinkage and it is difficult to effectively prevent shrinkage.

  The present invention has been made to solve the above-mentioned problems, and one object is to provide a shell mold mold capable of reliably performing directional solidification, and the other object is to It is to provide a method for producing a cast product using a simple shell mold.

  The shell mold mold according to the present invention includes a shell core, a first main mold, a second main mold, and an endothermic part. The shell core has a recess. The first main mold supports the shell core and is disposed on the side where the hollow portion is located with respect to the shell core. The second main mold is arranged on the opposite side of the shell core from the side where the recess is located, and a cavity is formed between the shell core and the first main mold. The heat absorption part is disposed in a region including a hollow part formed between the first main mold and the shell core in a state where the shell core is supported by the first main mold, and has a higher thermal conductivity than the shell core. Yes.

  The casting product manufacturing method according to the present invention is a casting product manufacturing method using a shell mold, and includes the following steps. As the shell mold mold, a shell core having a recess, a first main mold that supports the shell core, and a second main mold are prepared. An endothermic part having a thermal conductivity higher than that of the shell core is disposed in the hollow part of the shell core. A 1st main type | mold is arrange | positioned with respect to a shell core in the side in which a hollow part is located, and a shell core is supported by a 1st main type | mold. In a form in which a cavity is formed between the shell core and the first main mold, the second main mold is arranged on the opposite side of the shell core from the side where the recess is located. The first main mold and the second main mold are clamped so as to be sandwiched between the first main mold side and the second main mold side. Pour molten metal into the cavity. Cool the molten metal.

  In the shell mold mold according to the present invention, the heat absorption part having higher thermal conductivity than the shell core is a recess formed between the first main mold and the shell core in a state where the shell core is supported by the first main mold. It is arranged in the area including Thereby, after the molten metal is poured into the cavity, when the molten metal is cooled, the molten metal is directed in a direction from the side where the heat absorbing portion is disposed toward the side opposite to the side where the heat absorbing portion is disposed. It is possible to cool the casting, and it is possible to suppress the formation of shrinkage cavities in the cast product.

  According to the method for manufacturing a cast product according to the present invention, when the heat absorption part having higher thermal conductivity than the shell core is disposed in the hollow part of the shell core, and the molten metal poured into the cavity is cooled, the heat absorption part The molten metal can be directionally cooled from the side where the heat absorbing portion is disposed to the side opposite to the side where the heat absorbing portion is disposed, and a cast product in which the generation of shrinkage cavities is suppressed can be cast. .

It is sectional drawing of the shell mold casting which concerns on Embodiment 1 of this invention. In the same embodiment, it is sectional drawing which shows 1 process of the manufacturing method of the cast goods using a shell mold mold. FIG. 3 is a cross-sectional view showing a step performed after the step shown in FIG. 2 in the same embodiment. FIG. 4 is a cross-sectional view showing a step performed after the step shown in FIG. 3 in the same embodiment. FIG. 5 is a cross-sectional view showing a step performed after the step shown in FIG. 4 in the same embodiment. FIG. 6 is a cross-sectional view showing a step performed after the step shown in FIG. 5 in the same embodiment. FIG. 7 is a cross-sectional view showing a step performed after the step shown in FIG. 6 in the same embodiment. FIG. 8 is a cross-sectional view showing a step performed after the step shown in FIG. 7 in the same embodiment. It is sectional drawing of the shell mold casting which concerns on Embodiment 2 of this invention. It is sectional drawing of the shell mold casting which concerns on Embodiment 3 of this invention. In the same embodiment, it is sectional drawing which shows 1 process of the manufacturing method of the cast goods using a shell mold mold. FIG. 12 is a cross-sectional view showing a step performed after the step shown in FIG. 11 in the same embodiment. FIG. 13 is a cross-sectional view showing a step performed after the step shown in FIG. 12 in the same embodiment. FIG. 14 is a cross-sectional view showing a step performed after the step shown in FIG. 13 in the same embodiment. It is sectional drawing of the shell mold casting which concerns on Embodiment 4 of this invention. It is sectional drawing of the shell mold casting which concerns on Embodiment 5 of this invention. It is sectional drawing of the shell mold casting which concerns on Embodiment 6 of this invention. In the same embodiment, it is sectional drawing which shows 1 process of the manufacturing method of the cast goods using a shell mold mold.

  First, the shell mold mold will be described. A shell mold mold is a mold made of foundry sand. The molding sand is filled in the mold by blowing the molding sand coated with the thermosetting resin from the opening formed in the mold. Thereafter, by heating the mold with a burner or the like, the thermosetting resin is cured, and a mold corresponding to the mold is formed.

  A shell core is further used when a hollow part is formed as a cast product or when a key-like shape such as a lower jaw shape is formed. The shell core is also a mold made of foundry sand, and is fitted into the shell mold mold. The shell core is also referred to as a shell core.

  Unlike a normal sand mold molding, the shell mold mold is a frameless mold molding. Therefore, the shell mold mold needs to be clamped using a plate-like member such as an iron plate to perform mold matching. Hereinafter, a shell mold mold including a shell core will be described in each embodiment.

Embodiment 1 FIG.
The shell mold mold according to the first embodiment will be described. As shown in FIG. 1, the shell mold mold 1 includes a shell mold lower mold 3 as a first main mold, a shell mold upper mold 5 and a shell core 7 as a second main mold. The shell mold lower mold 3 is provided with a recess 3a. The shell mold lower mold 3 is provided with a communication portion 3b that penetrates the shell mold lower mold 3 and communicates with the recess 3a. The shell core 7 is provided with a recess 7a.

  The shell mold lower mold 3 is arranged on the side where the recess 7 a is located with respect to the shell core 7. The shell core 7 is supported by the shell mold lower mold 3 by receiving the shell core 7 in the recess 3 a of the shell mold lower mold 3. The shell mold upper mold 5 is disposed on the opposite side of the shell core 7 from the side where the recess 7 a is located.

  The shell mold upper mold 5 and the shell mold lower mold 3 are combined in such a manner that the convex part of the shell mold upper mold 5 and the concave part of the shell mold lower mold 3 receding from the upper part of the shell core 7 are brought into contact with each other. Yes. A cavity 9 is formed between the shell mold upper mold 5, the shell mold lower mold 3 and the shell core 7. On the mating surface of the shell mold lower mold 3 and the shell mold upper mold 5, an injection port (not shown) for injecting molten metal (molten metal) and a flow path for guiding the injected molten metal to the cavity 9 (FIG. (Not shown).

  A chiller 11 serving as a heat absorbing portion is disposed in a region including a hollow portion 7 a formed between the shell mold lower mold 3 and the shell core 7. The chiller 11 is exposed from the communication portion 3 b of the shell mold lower mold 3 to the surface (lower surface) of the shell mold lower mold 3. The thermal conductivity of the chiller 11 is higher than the thermal conductivity of the shell core 7. As the chiller 11, for example, a metal such as iron or copper is applied.

  Two iron plates 15 are arranged so as to sandwich the shell mold lower mold 3 and the shell mold upper mold 5. The shell mold lower mold 3 is placed on one iron plate 15, and one iron plate 15 is in contact with the shell mold lower mold 3. The other iron plate 15 is placed on the shell mold upper die 5, and the other iron plate 15 is in contact with the shell mold upper die 5.

  A through hole (not shown) is formed in each of the one iron plate 15 and the other iron plate 15. Bolts 17 are inserted from the through holes of the other iron plate 15 into the through holes of the one iron plate 15. By tightening the bolts 17, the lower shell mold 3 and the upper shell mold 5 sandwiched between the one iron plate 15 and the other iron plate 15 are tightened.

  Next, an example of a manufacturing method of a cast product using the shell mold mold 1 including the shell core 7 described above will be described.

  As shown in FIG. 2, the lower shell mold 3 is placed on the iron plate 15 with the recess 3 a facing upward. Next, the chiller 11 is attached to the recess 7a of the shell core 7 (see FIG. 3). Next, as shown in FIG. 3, the shell core 7 is fitted into the concave portion 3 a of the shell mold lower mold 3 with the chiller 11 mounted. The shell core 7 is supported by the shell mold lower mold 3 by fitting the shell core 7 into the recess 3a. Further, the chiller 11 is held in such a manner that it is sandwiched between the shell core 7 and the shell mold lower mold 3.

  Next, as shown in FIG. 4, the shell mold upper mold 5 is matched with the shell mold lower mold 3. A cavity 9 is formed between the shell mold upper mold 5 and the shell mold lower mold 3 and the shell core 7.

  Next, as shown in FIG. 5, the iron plate 15 is placed on the shell mold upper mold 5. Next, the bolt 17 is inserted into a through hole (not shown) of the iron plate 15. By tightening the bolt 17, the shell mold lower mold 3 and the shell mold upper mold 5 sandwiched between one iron plate 15 and the other iron plate 15 are tightened. Next, molten metal is injected from an injection port (not shown). Thereby, as shown in FIG. 6, the molten metal 21 is fed into the cavity 9.

  Next, as shown in FIG. 7, the molten metal 21 is cooled. At this time, the heat of the molten metal 21 is conducted to the lower shell mold 3, the upper shell mold 5, and the shell core 7. The heat conducted to the shell core 7 is further conducted to the chiller 11. Since the thermal conductivity of the chiller 11 is higher than the thermal conductivity of the shell core 7, in the molten metal 21, the portion located on the shell core 7 side is cooled faster than the portion located on the shell mold upper mold 5 side.

  Thereby, the molten metal 21 is cooled directionally from the shell core 7 side toward the shell mold upper mold 5 side. That is, the molten metal is cooled and solidified from the portion of the molten metal that is located inside the cast product toward the molten metal portion that is located outside the cast product. In FIG. 7, the magnitude of thermal conductivity is indicated by the thickness of the arrow, and the thick arrow indicates that the thermal conductivity is high.

  After the molten metal has solidified, the bolts 17 are loosened and the iron plate 15 is removed, and the shell mold lower mold 3, the shell mold upper mold 5, the shell core 7 and the like are further removed. Thus, as shown in FIG. 8, a casting 31 is manufactured.

  In the above-described shell mold mold 1, the chiller 11 is disposed in a region including the recess 7 a formed between the shell mold lower mold 3 and the shell core 7. The thermal conductivity of the chiller 11 is higher than the thermal conductivity of the shell core 7. That is, the chiller 11 having high thermal conductivity is disposed on the side where the shell mold lower mold 3 is located with respect to the cavity 9 into which the molten metal is poured, with the shell core 7 interposed therebetween.

  For this reason, in the molten metal 21 poured into the cavity 9, the portion located on the shell core 7 side is cooled faster than the portion located on the shell mold upper mold 5 side. Thereby, the molten metal 21 is directionally cooled from the portion located on the shell core 7 side toward the portion located on the shell mold upper mold 5 side. As a result, it is possible to suppress the occurrence of shrinkage when the molten metal 21 is solidified.

Embodiment 2. FIG.
In the second embodiment, an example of a shell mold mold to which a perforated iron plate is applied as an iron plate that sandwiches the lower shell mold and the upper shell mold will be described.

  As shown in FIG. 9, a perforated iron plate 16 is used in the shell mold mold 1. In the perforated iron plate 16 on which the shell mold lower mold 3 is placed, when viewed from the side on which the shell mold lower mold 3 is not placed, the portion of the chiller 11 is exposed at the bottom of the hole 16a. In addition, since it is the same as that of the structure of the shell mold mold 1 shown in FIG. 1 about a structure other than this, the same code | symbol is attached | subjected to the same member and the description will not be repeated unless it is required.

  Next, in the manufacturing method of the cast product using the shell mold mold 1 described above, except that the perforated iron plate 16 is used, the casting is performed by substantially the same process as the process shown in FIGS. Product can be manufactured. In particular, in the step corresponding to the step shown in FIG. 7 for cooling the molten metal, the heat of the molten metal 21 is conducted to the shell mold lower mold 3, shell mold upper mold 5 and shell core 7. The heat conducted to the shell core 7 is further conducted to the chiller 11 and is conducted from the portion of the chiller 11 exposed at the bottom of the hole 16a of the perforated iron plate 16 to the outside air.

  In the above-described shell mold mold 1, the chiller 11 having high thermal conductivity is disposed in a region including the recess 7 a formed between the shell mold lower mold 3 and the shell core 7. Moreover, a part of the chiller 11 is exposed at the bottom of the hole 16 a of the perforated iron plate 16. Thereby, the heat of the molten metal 21 conducted to the shell core 7 is further conducted to the chiller 11 and from the portion of the chiller 11 exposed at the bottom of the hole to the outside air.

  For this reason, in the molten metal 21 poured into the cavity 9, the portion located on the shell core 7 side is reliably cooled faster than the portion located on the shell mold upper mold 5 side. Thereby, the molten metal 21 is directionally cooled from the portion located on the shell core 7 side toward the portion located on the shell mold upper mold 5 side. As a result, it is possible to effectively suppress the occurrence of shrinkage when the molten metal 21 solidifies.

Embodiment 3 FIG.
When the shape of the cast product is complicated, the shape of the recess 7a of the shell core 7 may be complicated corresponding to the shape. In Embodiment 3, an example of a shell mold mold applicable in such a case will be described.

  As shown in FIG. 10, in the shell mold mold 1, the region including the hollow portion 7 a of the shell core 7 is filled with the granular heat absorber 13. As the granular heat absorber 13, for example, a metal sphere having a diameter of about 1 mm to 2 mm such as a media material of shot blasting can be applied. In addition, since it is the same as that of the structure of the shell mold mold 1 shown in FIG. 1 about a structure other than this, the same code | symbol is attached | subjected to the same member and the description will not be repeated unless it is required.

  Next, an example of a method for manufacturing a cast product using the above-described shell mold mold 1 will be described. In this method of manufacturing a cast product, the cast product is substantially the same as the steps shown in FIGS. 3 to 8 described above except for the work of filling the granular endothermic body 13 into the region including the hollow portion 7a of the shell core 7. Can be manufactured.

  As shown in FIG. 11, the shell core 7 is fitted into the recess 3 a of the shell mold lower mold 3 with the hollow portion 7 a of the shell core 7 facing upward. At this time, the shell core 7 and the shell mold lower mold 3 are bonded to each other. Next, as shown in FIG. 12, the granular heat-absorbing body 13 is filled from the communication portion 3 b of the shell mold lower mold 3 to the hollow portion 7 a of the shell core 7.

  Next, as shown in FIG. 13, the iron plate 15 is placed on the shell mold lower mold 3. Next, as shown in FIG. 14, the shell mold lower mold 3 and the iron plate 15 are turned upside down. Thereafter, a cast product is manufactured through substantially the same steps as those shown in FIGS. In particular, in the step corresponding to the step shown in FIG. 7 for cooling the molten metal, the heat of the molten metal 21 is conducted to the shell mold lower mold 3, shell mold upper mold 5 and shell core 7. The heat conducted to the shell core 7 is further conducted to the granular heat absorber 13.

  In the above-described shell mold mold 1, a region including the hollow portion 7 a formed between the shell mold lower mold 3 and the shell core 7 is filled with the granular heat absorber 13 having high thermal conductivity. Thereby, the heat of the molten metal 21 conducted to the shell core 7 is conducted to the granular heat absorber.

  For this reason, in the molten metal 21 poured into the cavity 9, the portion located on the shell core 7 side is cooled faster than the portion located on the shell mold upper mold 5 side. Thereby, the molten metal 21 is directionally cooled from the portion located on the shell core 7 side toward the portion located on the shell mold upper mold 5 side. As a result, it is possible to suppress the occurrence of shrinkage when the molten metal 21 that becomes a cast product having a complicated shape is solidified.

Embodiment 4 FIG.
In the fourth embodiment, a first example of a shell mold mold in which the hollow portion 7a of the shell core 7 is a hollow portion will be described.

  As shown in FIG. 15, the hollow portion 7 a of the shell core 7 is a hollow portion 8. The cavity 8 is connected to the outside air through the communication part 3 b of the shell mold lower mold 3. In addition, since it is the same as that of the structure of the shell mold mold 1 shown in FIG. 1 about a structure other than this, the same code | symbol is attached | subjected to the same member and the description will not be repeated unless it is required.

  Next, in the manufacturing method of the cast product using the shell mold mold 1 described above, the cast product is manufactured by substantially the same steps as those shown in FIGS. 2 to 8 except that the chiller 11 is not mounted. Can be manufactured. In particular, in the step corresponding to the step shown in FIG. 7 for cooling the molten metal, the heat of the molten metal 21 is conducted to the shell mold lower mold 3, shell mold upper mold 5 and shell core 7. The heat conducted to the shell core 7 is further conducted to the cavity 8 and conducted to the outside air through the communication part 3b.

  In the above-described shell mold mold 1, the hollow portion 7 a formed between the shell mold lower mold 3 and the shell core 7 is the hollow portion 8, and the hollow portion 8 is connected via the communicating portion 3 b of the shell mold lower mold 3. Connected with the open air. Thereby, the heat of the molten metal 21 conducted to the shell core 7 is conducted to the outside air through the cavity 8.

  For this reason, in the molten metal 21 poured into the cavity 9, the portion located on the shell core 7 side is cooled faster than the portion located on the shell mold upper mold 5 side. Thereby, the molten metal 21 is directionally cooled from the portion located on the shell core 7 side toward the portion located on the shell mold upper mold 5 side. As a result, it is possible to suppress the formation of shrinkage nests when the molten metal 21 is solidified.

Embodiment 5 FIG.
In the fifth embodiment, a second example of the shell mold mold in which the hollow portion 7a of the shell core 7 is a hollow portion will be described.

  As shown in FIG. 16, the hollow portion 7 a of the shell core 7 is a hollow portion 8. An uneven fin-shaped portion 7b is provided on the surface of the recessed portion 7a. The cavity 8 is connected to the outside air through the communication part 3 b of the shell mold lower mold 3. In addition, since it is the same as that of the structure of the shell mold mold 1 shown in FIG. 1 about a structure other than this, the same code | symbol is attached | subjected to the same member and the description will not be repeated unless it is required.

  Next, in the manufacturing method of the cast product using the shell mold mold 1 described above, the cast product is manufactured by substantially the same steps as those shown in FIGS. 2 to 8 except that the chiller 11 is not mounted. Can be manufactured. In particular, in the step corresponding to the step shown in FIG. 7 for cooling the molten metal, the heat of the molten metal 21 is conducted to the shell mold lower mold 3, shell mold upper mold 5 and shell core 7. The heat conducted to the shell core 7 is further conducted to the cavity 8. At this time, the heat conducted to the shell core 7 can be efficiently conducted to the cavity portion 8 by providing the fin-shaped portion 7b on the surface of the recess portion 7a. The heat conducted to the cavity portion 8 is conducted to the outside air through the communication portion 3b.

  In the above-described shell mold mold 1, the hollow portion 7 a formed between the shell mold lower mold 3 and the shell core 7 is the hollow portion 8, and the hollow portion 8 is connected via the communicating portion 3 b of the shell mold lower mold 3. Connected with the open air. Moreover, the fin-shaped portion 7b is provided on the surface of the recessed portion 7a. Thereby, the heat conducted to the shell core 7 is efficiently conducted to the cavity portion 8, and the heat conducted to the cavity portion 8 is conducted to the outside air through the communication portion 3b.

  For this reason, in the molten metal 21 poured into the cavity 9, the portion located on the shell core 7 side is cooled faster than the portion located on the shell mold upper mold 5 side. Thereby, the molten metal 21 is directionally cooled from the portion located on the shell core 7 side toward the portion located on the shell mold upper mold 5 side. As a result, it is possible to reliably suppress the occurrence of shrinkage nests when the molten metal 21 is solidified.

Embodiment 6 FIG.
In the sixth embodiment, an example of a shell mold mold in which a thick portion is provided in a shell core will be described.

  As shown in FIG. 17, the shell core 7 is provided with a thick portion 7 c that protrudes toward the cavity portion 8. The cavity 8 is connected to the outside air through the communication part 3 b of the shell mold lower mold 3. In addition, since it is the same as that of the structure of the shell mold mold 1 shown in FIG. 1 about a structure other than this, the same code | symbol is attached | subjected to the same member and the description will not be repeated unless it is required.

  Next, in the manufacturing method of the cast product using the shell mold mold 1 described above, the cast product is manufactured by substantially the same steps as those shown in FIGS. 2 to 8 except that the chiller 11 is not mounted. Can be manufactured.

  In particular, in the step of cooling the molten metal, as shown in FIG. 18, the heat of the molten metal 21 is conducted to the lower shell mold 3, the upper shell mold 5, and the shell core 7. The heat conducted to the shell core 7 is further conducted to the cavity 8. At this time, the thermal conductivity in the thick portion 7c is lower than the thermal conductivity in the portion other than the thick portion 7c.

  For this reason, when cooling the molten metal 21 with directivity, the cooling rate of the molten metal 21 can be suppressed by the thick-walled portion 7 c for the portion that needs to suppress the cooling rate. In FIG. 18, the magnitude of the thermal conductivity in the shell core 7 is indicated by the thickness of the arrow, and the thick arrow indicates that the thermal conductivity is high.

  In the shell mold mold 1 described above, the shell core 7 is provided with a thick portion 7 c that protrudes toward the cavity portion 8. Thereby, when the molten metal 21 is cooled with directivity according to the shape of the cavity 9 (cast product), the cooling rate of the molten metal 21 is suppressed by the thick wall portion 7c for the portion that needs to suppress the cooling rate. Can do. As a result, even if the cavity 9 has a complicated shape, it is possible to suppress the occurrence of shrinkage cavities when the molten metal 21 is solidified.

  In addition, about the shell mold casting_mold | template demonstrated in each embodiment, it is possible to combine variously as needed.

  The embodiment disclosed this time is an example, and the present invention is not limited to this. The present invention is defined by the terms of the claims, rather than the scope described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention is effectively used for a shell mold mold having a shell core.

  1 shell mold mold, 3 shell mold lower mold, 3a recess, 3b communication section, 5 shell mold upper mold, 7 shell core, 7a hollow section, 7b fin-shaped section, 7c thick section, 8 cavity section, 9 cavity, 11 chiller, 13 granular endothermic body, 15 iron plate, 16 holed iron plate, 16a hole, 17 bolt, 21 molten metal, 31 cast product.

Claims (12)

A shell core having a recess,
A first main mold that supports the shell core and is disposed on a side where the hollow portion is positioned with respect to the shell core;
A second main mold that is disposed on the opposite side of the shell core from the side on which the hollow portion is located, and in which a cavity is formed between the shell core and the first main mold;
In a state where the shell core is supported by the first main mold, the shell core is disposed in a region including the hollow portion formed between the first main mold and the shell core, and has higher thermal conductivity than the shell core. A shell mold mold having an endothermic part.   The shell mold according to claim 1, wherein the heat absorption part includes a chiller.   The shell mold according to claim 1, wherein the endothermic part includes a granular endothermic body.   The shell mold according to claim 1, wherein the heat absorption part includes a cavity part.   The shell mold mold according to claim 4, wherein irregularities are formed on a surface of the hollow portion of the shell core.   The shell mold mold according to claim 4, wherein the shell core is provided with a thick portion that protrudes toward the hollow portion. A first plate member and a second plate member, wherein the first plate member is brought into contact with the first main mold, the second plate member is brought into contact with the second main mold, and the first plate member and the second plate member; A clamping member that clamps the first main mold and the second main mold in a manner sandwiched between
The shell mold mold according to any one of claims 1 to 6, wherein an opening for exposing the heat absorbing portion is formed in the first plate member. A manufacturing method of a cast product using a shell mold mold,
Preparing a shell core having a depression, a first main mold that supports the shell core, and a second main mold as the shell mold mold; and
A step of disposing a heat absorbing part having higher thermal conductivity than the shell core in the hollow part of the shell core;
Disposing the first main mold on the side where the hollow portion is positioned with respect to the shell core, and supporting the shell core on the first main mold;
In a mode in which a cavity is formed between the shell core and the first main mold, the second main mold is disposed on the opposite side of the shell core from the side where the hollow portion is located;
Tightening the first main mold and the second main mold so as to be sandwiched between the first main mold side and the second main mold side;
Pouring molten metal into the cavity;
A method for producing a cast product, comprising a step of cooling the molten metal.   The method of manufacturing a cast product according to claim 8, wherein the step of arranging the heat absorbing portion in the shell core includes a step of arranging a chiller in the hollow portion as the heat absorbing portion.   The method for producing a cast product according to claim 8, wherein the step of arranging the endothermic part in the shell core includes a step of filling the hollow part with a granular endothermic body as the endothermic part.   The method for producing a cast product according to claim 8, wherein the step of disposing the heat absorbing portion on the shell core includes a step of using the hollow portion as a hollow portion. In the step of fastening the first main mold and the second main mold, a first plate material and a second plate material are prepared, and the second main mold and the second main material are prepared by the first plate material and the second plate material. The manufacturing method of the casting of any one of Claims 8-11 including the process of pinching | molding a type | mold.

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