Casting mold, casting mold system, and method for producing member

Abstract

Provided is a casting mold having: a cavity (10) in which a plate-shaped portion and protruding portions are cast when a melt flows thereinto and solidifies, and which includes a first surface portion for forming an edge surface of the plate-shaped portion and a second surface portion for forming either one or the other plate surface of the plate-shaped portion; and a riser (4A) comprising a weir (3) which is disposed adjoining to the first surface portion from outside the cavity (10) and through which the melt is caused to flow into the cavity (10), a supply part (41) which is connected to the weir (3) and supplies the melt to the weir (3), and a heating portion (42) which is disposed in a position separated, in a direction perpendicular to the second surface portion, from both the weir (3) and an edge portion of the second surface portion that is adjacent to the weir (3), and which is positioned so as to overlie both the weir (3) and the edge portion of the second surface portion when viewed from a direction perpendicular to the second surface portion, the heating portion (42) heating the weir (3) and the edge portion of the second surface portion by means of the heat of the melt when the melt has flowed in.

Description

Mold, mold system, and method for manufacturing a component

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to molds, mold systems, and methods of manufacturing components.

[0002] Examples of components having a plate-like portion and a protruding portion protruding from one surface of the plate-like portion include fixed scrolls and orbiting scrolls used in scroll compressors. Such components are sometimes manufactured by casting, and various casting molds have been developed to prevent defects, such as shrinkage cavities, that occur during casting.

[0003] For example, Patent Document 1 discloses a semi-molten metal forming die for forming a thin-walled portion in the center of a base plate of an orbiting scroll. The die disclosed in Patent Document 1 forms a thin-walled portion in the center of the base plate by providing a protrusion on the portion that forms the base plate. This allows the die to accelerate solidification of the semi-molten metal and prevent the occurrence of shrinkage cavities.

[0004] Furthermore, Patent Document 2 discloses a mold for casting an orbiting scroll, which is provided with a cooling means, for example, a water-cooled jacket. In the mold described in Patent Document 2, the cooling means forcibly cools the center of the spiral body of the orbiting scroll during casting. This allows the mold to impart solidification directionality to the molten metal from the center of the spiral body toward the outer periphery. As a result, this mold prevents the occurrence of shrinkage cavities.

[0005] JP 2007-263107 A JP 2008-309099 A

[0006] The mold structure described in Patent Document 1 tends to be complicated because a protrusion is provided in the cavity. The mold structure described in Patent Document 2 also tends to be complicated because a cooling means is provided in the mold.

[0007] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a mold, a mold system, and a method for manufacturing a component that can prevent the occurrence of shrinkage cavities with a simple configuration.

[0008] To achieve the above object, the mold according to the present disclosure is a mold for casting a member having a plate-shaped portion and a protrusion protruding from one plate surface of the plate-shaped portion. The mold includes a cavity, a weir, and a feeder. The cavity includes a first surface portion for forming an end face of the plate-shaped portion and a second surface portion for forming either one plate surface or the other plate surface of the plate-shaped portion, and casts the plate-shaped portion and the protrusion when molten metal flows into the cavity and solidifies. The weir is provided adjacent to the first surface portion from outside the cavity and serves to allow the molten metal to flow into the cavity. The feeder section has a supply section connected to the weir and supplies molten metal to the weir, and a heating section located at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section, and located at a position overlapping the weir and the end of the second surface section when viewed from a direction perpendicular to the second surface section, and which warms the weir and the end of the second surface section with the heat of the molten metal when the molten metal flows in.

[0009] According to the configuration of the present disclosure, the feeder includes a supply section connected to the weir and supplying molten metal to the weir, and a heating section located at a position spaced apart from the weir and the end of the second surface adjacent to the weir in a direction perpendicular to the second surface, and overlapping the weir and the end of the second surface when viewed perpendicular to the second surface, for heating the weir and the end of the second surface with the heat of the molten metal when the molten metal flows in. Therefore, in the mold, the molten metal at the weir and the molten metal in contact with the second surface are less likely to solidify, and the molten metal can be stably supplied from the feeder. As a result, the mold can cast a component that is free of shrinkage cavities. Furthermore, the mold configuration is simple, as only the supply section and heating section are provided in the feeder.

[0010] 1A is a cross-sectional view along the IB-IB section line shown in FIG. 2A; FIG. 2B is a cross-sectional view along the IIB-IIB section line shown in FIG. 2A; and FIG. 2C is a diagram showing a simulation of the solidification state of molten metal when cast using a normal mold in which a feeder portion is arranged between the fixed scrolls to be cast. 3A is a perspective view of a sand mold according to the first embodiment of the present disclosure; 4A is a perspective view showing the positional relationship between a cavity, a feeder portion, and a gate provided in the sand mold according to the first embodiment of the present disclosure; 5A is an enlarged top view showing the positional relationship between a cavity and a feeder portion provided in the sand mold according to the first embodiment of the present disclosure; and 6A is a cross-sectional view along the VII-VII section line shown in FIG. 6; 12A and 12B are diagrams showing simulations of solidification of molten metal when a certain time has elapsed since pouring molten metal into the sand mold when a fixed scroll is cast using the sand mold according to embodiment 1 of the present disclosure; FIG. 13A is a diagram showing simulations of solidification of molten metal when a certain time has elapsed since pouring molten metal into the sand mold when a fixed scroll is cast using the sand mold according to embodiment 1 of the present disclosure; FIG. 14B is a diagram showing simulations of solidification of molten metal when pouring molten metal into the sand mold according to embodiment 2 of the present disclosure; FIG. 15A is a diagram showing simulations of solidification of molten metal when pouring molten metal into the sand mold according to embodiment 2 of the present disclosure; FIG. 16A is a diagram showing simulations of solidification of molten metal when pouring molten metal into the sand mold according to embodiment 1 of the present disclosure; FIG. 17B is a diagram showing simulations of solidification of molten metal when a certain time has elapsed since pouring molten metal into the sand mold according to embodiment 2 of the present disclosure;

[0011] Hereinafter, a mold, a mold system, and a method for manufacturing a member according to embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or equivalent parts are designated by the same reference numerals.

[0012] (Embodiment 1) A mold according to embodiment 1 is a mold for casting a scroll member included in a scroll compressor. In this mold, a feeder portion is provided to prevent the occurrence of shrinkage cavities, and the feeder portion covers a weir and an end of a cavity connected to the weir from above.

[0013] The following describes in detail the configuration of a mold, taking as an example a case where the mold is a general-purpose sand mold used in gravity casting and the object to be cast is a fixed scroll or an orbiting scroll, which are types of scroll members. First, the configurations of the fixed scroll and the orbiting scroll to be cast will be described with reference to Figures 1A, 1B, 2, and 3.

[0014] Fig. 1A is a top view of a fixed scroll 100 from which a mold according to embodiment 1 is manufactured. Fig. 1B is a cross-sectional view taken along the line IB-IB shown in Fig. 1A. For ease of understanding, Figs. 1A and 1B show the fixed scroll 100 with its teeth pointing upward.

[0015] As shown in FIGS. 1A and 1B, the fixed scroll 100 includes a base plate 110 and a scroll body 120 supported by the base plate 110.

[0016] Although not shown, the scroll compressor includes a shell formed in a cylindrical shape. The base plate 110 is formed in a disk shape to be fitted into the shell, as shown in Figures 1A and 1B. A scroll body 120 is provided on one surface, i.e., the upper surface, of the central portion of the base plate 110.

[0017] The scroll 120 has a shape in which a strip-shaped plate is bent into a spiral shape. The scroll 120 protrudes from the upper surface of the base plate 110 with the width direction of the plate, i.e., the extension direction of the teeth, perpendicular to the base plate 110. Because the scroll 120 has such a shape, the fixed scroll 100 can mesh with the teeth of the orbiting scroll. The fixed scroll 100 is incorporated into a scroll compressor (not shown), and compresses a fluid by the oscillation of the orbiting scroll while meshing with the teeth of the orbiting scroll. Next, the configuration of the orbiting scroll will be described.

[0018] Fig. 2A is a top view of an orbiting scroll 200 from which a mold according to embodiment 1 is manufactured. Fig. 2B is a cross-sectional view taken along the line IIB-IIB shown in Fig. 2A. For ease of understanding, Figs. 2A and 2B show the orbiting scroll 200 with its teeth pointing upward, as in the case of the fixed scroll 100.

[0019] As shown in Figures 2A and 2B, the orbiting scroll 200 includes a base plate 210, a scroll 220 supported by the base plate 210, and a cylindrical portion 230 provided on the surface of the base plate 210 opposite to the surface on which the scroll 220 is located.

[0020] The base plate 210 is formed in the shape of a disk having an outer diameter smaller than that of the base plate 110 of the fixed scroll 100 so that the orbiting scroll 200 can orbit within the cylindrical shell (not shown) without interfering with the shell. A scroll 220 is provided on one surface of the base plate 210, i.e., on the upper surface side.

[0021] The spiral body 220 has a shape in which a strip-shaped plate is bent into a spiral shape. The spiral direction of the strip-shaped plate of the spiral body 220 is opposite to that of the spiral body 120 when viewed from above. The spiral body 220 protrudes from the upper surface of the base plate 210 with the width direction of the plate, i.e., the extension direction of the teeth, perpendicular to the base plate 210. Because the spiral body 220 has such a shape, the orbiting scroll 200 can mesh with the teeth of the spiral body 120 provided in the fixed scroll 100. The orbiting scroll 200 is incorporated into a scroll compressor (not shown), and oscillates to compress the fluid by meshing with the teeth of the spiral body 120 of the fixed scroll 100. Meanwhile, a cylindrical portion 230 is provided on the other surface, i.e., the lower surface, of the base plate 210.

[0022] The cylindrical portion 230 is formed with an inner diameter that allows a crankshaft of a scroll compressor (not shown) to be inserted therein. When the cylindrical portion 230 is assembled into the scroll compressor, the crankshaft is inserted into the cylindrical portion 230 and connected to the crankshaft. This allows the rotation of the crankshaft to be transmitted to the cylindrical portion 230 when assembled into the scroll compressor. As a result, the cylindrical portion 230 causes the orbiting scroll 200 to orbit.

[0023] The fixed scroll 100 and the orbiting scroll 200 having such a configuration are manufactured by casting. In the casting, a sand mold having a space, i.e., a cavity, for forming the fixed scroll 100 or the orbiting scroll 200 is used. Molten metal is poured into the cavity and solidified to manufacture the fixed scroll 100 or the orbiting scroll 200.

[0024] However, because the scroll 120 is provided in the center of the base plate 110, the amount of heat in the center of the base plate 110 increases during casting of the fixed scroll 100. As a result, the solidification of the molten metal that forms the center of the base plate 110 directly below the scroll 120 is delayed. This causes the molten metal that forms the outer periphery of the base plate 110 to solidify before the molten metal that forms the center of the base plate 110, which can result in shrinkage cavities occurring in the center of the base plate 110. Figure 3 shows how the outer periphery of the base plate 110 solidifies first, which is the cause of the shrinkage cavities.

[0025] 3 is a diagram showing a simulation of the solidification state of the molten metal when casting is performed using a normal mold in which a feeder portion is disposed between the fixed scrolls 100 to be cast. Note that Fig. 3 does not show the upper and lower halves of the mold, and only shows the molten metal 300 and the solidified molten metal.

[0026] As shown in Figure 3, during casting, the outer periphery of the fixed scroll 100 solidifies first, leaving the molten metal 300 in the center of the fixed scroll 100. The molten metal 300 is then interrupted between the fixed scroll 100 and the feeder head 310. As a result, the last solidified portion remains inside the fixed scroll 100, and shrinkage cavities occur in that portion. For example, shrinkage cavities occur in the center portion of the base plate 110 where the scroll body 120 is located, the base portion of the scroll body 120, and the like. When such shrinkage cavities occur, the strength of the fixed scroll 100 decreases, despite the fact that high strength is required.

[0027] Although not shown, when casting the orbiting scroll 200, the scroll 220 is provided in the center of the base plate 210. As a result, as in the case of the fixed scroll 100, the molten metal 300 forming the outer periphery of the base plate 210 tends to solidify before the molten metal 300 forming the center of the base plate 210. As a result, shrinkage cavities may occur in the center of the base plate 210. In that case, the orbiting scroll 200 will not be able to achieve high strength.

[0028] Therefore, in order to prevent the occurrence of such shrinkage cavities, a sand mold according to embodiment 1 is used in the casting process for casting the fixed scroll 100 or the orbiting scroll 200, which is equipped with a feeder portion that is an improved version of the feeder portion 310 found in a normal sand mold. That is, in embodiment 1, a sand mold is used that is equipped with a feeder portion that covers the weir and the end of the cavity connected to the weir from above and heats the weir and the end of the cavity.

[0029] Generally, a feeder refers to a supply of molten metal to prevent shrinkage or the formation of gaps in the mold cavity when the molten metal 300 solidifies, or to a pouring pool. In this specification, however, a feeder portion refers to the latter space that forms the pouring pool.

[0030] Next, the configuration of the sand mold will be described with reference to Figures 4 to 7. In the following description, for ease of understanding, the sand mold for casting the fixed scroll 100 will be described, out of the fixed scroll 100 and the orbiting scroll 200 described above.

[0031] Fig. 4 is a perspective view of the sand mold 1A according to the first embodiment. Fig. 5 is a perspective view showing the positional relationship between the cavity 10, the feeder 4A, and the gate 5 provided in the sand mold 1A. Fig. 6 is an enlarged top view showing the positional relationship between the cavity 10 and the feeder 4A. Fig. 7 is a cross-sectional view taken along the VII-VII cutting line shown in Fig. 6.

[0032] For ease of understanding, Fig. 4 omits the illustration of the upper and lower dies for forming the feeder portion 4A and the gate 5 of the sand mold 1A. Figs. 5 to 7 omit the illustration of the upper and lower dies as well as the core 2. Instead, Figs. 5 to 7 illustrate the shape of the cavity 10 for casting the fixed scroll 100.

[0033] 4 to 7, when the top surface of the base plate forming part 11 provided in the cavity 10 faces in the vertical direction, the direction from the weir 3 toward the center of the base plate forming part 11 is the X axis, the vertical direction is the Z axis, and the direction perpendicular to the X axis and Z axis is the Y axis. This coordinate system will be referred to as appropriate in the following explanation.

[0034] The sand mold 1A includes a core 2 shown in FIG. 4 that forms a cavity 10, a weir 3 shown in FIG. 7 that allows molten metal 300 to flow into the cavity 10, and a feeder 4A shown in FIG. 4 that supplies the molten metal 300 to the cavity 10.

[0035] The core 2 shown in Fig. 4 is made of sand such as mountain sand, river sand, beach sand, synthetic sand, or the like. Although not shown in Fig. 4, the lower portion of the core 2 is formed in a shape that matches the outer shape of the upper surface of the spiral body 120 and the outer shape of the upper surface of the base plate 110 of the fixed scroll 100 described above. The core 2 is disposed between an upper mold (not shown) and a lower mold that matches the outer shape of the lower surface of the base plate 110 provided on the fixed scroll 100. The core 2, together with the upper and lower molds, forms the cavity 10 shown in Figs. 5 to 7 for casting the fixed scroll 100.

[0036] The cavity 10 has a base plate forming portion 11 that forms the base plate 110 of the fixed scroll 100, and a scroll forming portion 12 that forms the scroll 120. Of these components of the cavity 10, the base plate forming portion 11 is connected to a weir 3 shown in FIG. 7 for introducing molten metal 300 during casting.

[0037] 7, the base plate forming portion 11 has an end face portion 13 that forms the outer peripheral surface of the base plate 110 included in the fixed scroll 100, i.e., that forms the outer peripheral end face. The dam 3 is provided adjacent to the end face portion 13 from the outside of the cavity 10. In other words, the base plate forming portion 11 is a disk-shaped space, and the dam 3 communicates with that space in the diameter direction of the base plate forming portion 11 and from the outside.

[0038] The weir 3 is an entrance to the cavity 10 through which the molten metal 300 flows into the cavity 10 during casting. The weir 3 is a part that is removed from the cast fixed scroll 100 after casting. The weir 3 is formed to be significantly smaller than the base plate 110 of the fixed scroll 100 to facilitate removal after casting.

[0039] Specifically, as shown in Figure 6, the shape of the weir 3 in top view is a bent rectangle having two long sides that protrude in an arc shape toward the outside of the base plate forming portion 11 and two short sides that are parallel to each other. The long sides are smaller than the radius of the base plate forming portion 11 or the scroll diameter R1 of the scroll forming portion 12. The short sides have the same thickness as the wall thickness T1 of the core 2. For example, the short sides are approximately 3 to 15 mm.

[0040] The cross-sectional shape of the weir 3 is rectangular, as shown in Figure 7. Its length, i.e., the length in the X direction, is the same as the wall thickness T1 of the core 2 described above. The cross-sectional height of the weir 3, i.e., the length in the Z direction, is equal to or less than the Z direction length of the end surface portion 13 of the base plate forming portion 11. For example, the length in the Z direction is 3 to 60 mm. The supply portion 41 of the feeder portion 4A is adjacent to the side of the weir 3 opposite to the side adjacent to the base plate forming portion 11, i.e., the -X side of the weir 3. This connects the weir 3 to the feeder portion 4A.

[0041] As described above, the feeder section 4A functions as a pouring basin for supplying the molten metal 300 to the cavity 10. To explain its configuration in detail, the feeder section 4A is provided with a supply section 41 connected to the weir 3 to supply the molten metal 300, and a heating section 42 which has a portion facing the weir 3 and the end of the base plate forming section 11 connected to the weir 3, and which heats the weir 3 and the end of the base plate forming section 11 when the molten metal 300 is poured into the feeder section 4A.

[0042] The supply portion 41 is connected to the weir 3 and functions as a connecting portion for the feeder portion 4A. Although not shown, the supply portion 41 is formed in a rectangular shape with two long sides recessed inward in an arc-like shape in top view. This is because, as shown in FIG. 5 , the supply portion 41 is adjacent to the base plate forming portions 11 between the base plate forming portions 11 of the cavity 10, and these base plate forming portions 11 have a circular shape in top view. As shown in FIG. 7 , the supply portion 41 extends to a position higher than the base plate forming portions 11 of the cavity 10 while maintaining its shape in top view. The supply portion 41 is connected to the weir 3 described above midway. As a result, when the molten metal 300 is poured during casting, the supply portion 41 supplies the molten metal 300 to the base plate forming portions 11.

[0043] In contrast, the heating section 42 extends from the supply section 41 to a position higher than the spiral body forming section 12 of the cavity 10, and is a section that enables the molten metal 300 to be supplied to the spiral body forming section 12 during casting. Furthermore, the heating section 42 protrudes from the supply section 41 above the outer periphery of the weir 3 and the base plate forming section 11, and is a section that warms the outer periphery of the weir 3 and the base plate forming section 11 with the heat of the molten metal 300 during casting.

[0044] Specifically, the heating section 42 is provided above the supply section 41 and extends from the upper end of the supply section 41 to a position sufficiently higher than the spiral body forming section 12 of the cavity 10. For example, the upper end of the heating section 42 is 10 mm or more higher than the spiral body forming section 12. This allows the heating section 42 to flow the molten metal 300 into the supply section 41 during casting, and to replenish the molten metal 300 to the entire cavity 10, including the spiral body forming section 12.

[0045] Furthermore, the heating section 42 protrudes from the supply section 41 toward the cavity 10. That is, the heating section 42 protrudes from the supply section 41 toward the +X side. Furthermore, the position from which the heating section 42 protrudes is a position spaced above the outer periphery of the base plate forming section 11 of the cavity 10. As a result, the heating section 42 covers the outer periphery of the base plate forming section 11 from above. In other words, the heating section 42 overlaps with the outer periphery of the base plate forming section 11 when viewed from a direction perpendicular to the plate surface of the base plate forming section 11, that is, when viewed from above or below.

[0046] More specifically, the heating section 42 is formed by the outer surface of the core 2 (not shown in FIG. 7 ), and therefore protrudes upward from the base plate forming section 11 by the thickness T2 of the core 2. That is, the heating section 42 protrudes from the +Z side of the base plate forming section 11, at a position separated from the base plate forming section 11 by the thickness T2 of the core 2. The heating section 42 also protrudes from the supply section 41 toward the +X side by a distance L greater than the thickness T1 of the core 2. That is, the heating section 42 protrudes toward the +X side by a distance greater than the X-direction length of the weir 3. As a result, the heating section 42 protrudes, for example, from the spiral body forming section 12 in the −X direction to a position separated by the thickness T1 of the core 2. This causes the heating section 42 to face the weir 3. The heating section 42 also faces the −X end of the top surface 14 of the base plate forming section 11. As a result, heating section 42 has a facing portion 43 that faces weir 3 and the −X end of top surface section 14. Note that thickness T1 of core 2 in the X direction may be different from thickness T2 of core 2 in the Z direction, or may be the same as thickness T2.

[0047] As shown in FIG. 6 , the width W1 of the facing portion 43 in a top view is equal to or greater than the width W2 of the weir 3. For example, if the width W2 of the weir 3 is 10 to 20% of the scroll diameter R1, the minimum value of the width W1 of the facing portion 43 is 10 to 20% of the scroll diameter R1. Alternatively, the minimum value of the width W1 of the facing portion 43 is 50 mm smaller than the scroll diameter R1. Furthermore, the maximum value of the width W1 of the facing portion 43 is 50 mm larger than the diameter R2 of the base plate forming portion 11. The facing portion 43 has this width W1 and protrudes by the above-mentioned distance L, thereby completely covering the weir 3 from above.

[0048] 7, the facing portion 43 faces the weir 3 or the -X end of the top surface 14 of the base plate forming portion 11 at a distance equal to the thickness T2 of the core 2. This is because the facing portion 43 is formed by the outer surface of the core 2. As a result, when the molten metal 300 is poured into the heating portion 42 during casting, the heating portion 42 transfers the heat of the molten metal 300 from the facing portion 43 through the core 2 to the weir 3 and the -X end of the top surface 14 of the base plate forming portion 11. As a result, the heating portion 42 heats the weir 3 and the -X end of the top surface 14 of the base plate forming portion 11 during casting. This makes it more difficult for the molten metal 300 at the weir 3 and the molten metal 300 flowing under the top surface 14 of the base plate forming portion 11 to solidify during casting in the sand mold 1A than the molten metal 300 in other portions. As a result, in the sand mold 1A, the molten metal 300 can be replenished from the feeder portion 4A until all of the molten metal 300 that has flowed into the cavity 10 solidifies, thereby preventing the occurrence of shrinkage cavities inside the cavity 10. This enables the sand mold 1A to cast a fixed scroll 100 with sufficient strength.

[0049] Next, the function of the riser 4A in the sand mold 1A will be described with reference to FIGS. 8A and 8B.

[0050] 8A is a diagram of a simulation showing how molten metal 300 solidifies after a certain time has elapsed since pouring the molten metal 300 into a normal sand mold when the fixed scroll 100 is cast using the normal sand mold. FIG. 8B is a diagram of a simulation showing how molten metal 300 solidifies after a certain time has elapsed since pouring the molten metal 300 into the sand mold 1A when the fixed scroll 100 is cast using the sand mold 1A according to embodiment 1.

[0051] 8A and 8B, it can be seen that sand mold 1A according to embodiment 1 has a smaller depth D relative to the width W of molten metal 300 than a normal sand mold. Specific values ​​are shown in Table 1.

[0052]

[0053] As shown in Table 1, the sand mold 1A according to embodiment 1 has a depth D relative to the width W of the molten metal 300 that is half or less of that of a normal sand mold. This shows that, in the sand mold 1A, the molten metal 300 that forms the outer periphery of the fixed scroll 100 is less likely to solidify before the molten metal 300 that forms the central portion. As a result, in the sand mold 1A, it is less likely that the molten metal 300 that forms the outer periphery of the fixed scroll 100 solidifies first, leaving the molten metal 300 that forms the central portion of the fixed scroll 100 isolated. In this way, in the sand mold 1A, the molten metal 300 that forms the central portion of the fixed scroll 100 is less likely to be isolated than in a normal sand mold, and shrinkage cavities are less likely to occur.

[0054] The sand mold 1A described above is an example of a casting mold as defined in the present disclosure. The upper and lower molds are an example of a main mold as defined in the present disclosure. The supply portion 41 of the feeder portion 4A is an example of a connecting portion as defined in the present disclosure. The heating portion 42 or the opposing portion 43 of the feeder portion 4A is an example of an opposing portion as defined in the present disclosure. The end surface portion 13 is an example of a first surface portion as defined in the present disclosure. The top surface portion 14 of the base plate forming portion 11 is an example of a second surface portion as defined in the present disclosure.

[0055] The fixed scroll 100 is an example of a member having a plate-like portion and a protruding portion protruding from one surface of the plate-like portion, as defined in the present disclosure. The base plate 110 and the spiral body 120 of the fixed scroll 100 are an example of a plate-like portion and a protruding portion, as defined in the present disclosure.

[0056] Furthermore, instead of the fixed scroll 100 described above, the sand mold 1A may be used to cast an orbiting scroll 200. In this case, the orbiting scroll 200 is an example of a member having the plate-like portion and a protruding portion protruding from one plate surface of the plate-like portion. The base plate 210 of the orbiting scroll 200 is an example of the plate-like portion. The scroll body 220 and cylindrical portion 230 of the orbiting scroll 200 are an example of the protruding portion.

[0057] The fixed scroll 100 and the orbiting scroll 200 described above are manufactured by (1) a casting process in which molten metal is poured into a sand mold 1A and solidified, and (2) a post-processing process after the casting process in which the sand mold 1A is disassembled, the sand is removed, and burrs and other solidified portions of the molten metal at the weir 3, the feeder portion 4A, etc. are removed from the cast fixed scroll 100 or the orbiting scroll 200. The above-described casting process is an example of the casting process defined in the present disclosure.

[0058] As described above, in the sand mold 1A according to the first embodiment, the feeder 4A extends from the supply section 41 to the weir 3, and includes a heating section 42 that extends over the end of the top surface 14 of the base plate forming section 11 adjacent to the weir 3. When molten metal flows into the feeder 4A, the feeder 4A includes a heating section 42 that warms the end of the weir 3 and the top surface 14 with the heat of the molten metal. Therefore, in the sand mold 1A, the molten metal 300 in the weir 3 and the molten metal 300 flowing through the top surface 14 is less likely to solidify. The sand mold 1A can replenish the molten metal 300 from the feeder 4A via the weir 3 and the top surface 14 until all of the molten metal 300 in the cavity 10 solidifies. As a result, the sand mold 1A can prevent shrinkage cavities from occurring in the fixed scroll 100. This allows the sand mold 1A to cast a high-strength fixed scroll 100.

[0059] Furthermore, the sand mold 1A has a simple structure, as long as the riser 4A covers the weir 3 and the end of the top surface 14 of the base plate forming portion 11 and faces the weir 3 and the end of the top surface 14. As a result, the sand mold 1A is easy to manufacture.

[0060] In the first embodiment, the sand mold 1A has four cavities 10, but a configuration including each of the cavities 10, the weirs 3 connected to each of the cavities 10, and the feeder portions 4A connected to each of the cavities 10 may also be called a casting mold or a sand mold. In this case, in the first embodiment, the combination of these four casting molds or sand molds may also be called a casting mold system.

[0061] (Embodiment 2) In Embodiment 1, the sand mold 1A has four cavities 10 and two feeder heads 4A for casting four fixed scrolls 100. However, the sand mold 1A is not limited to this. When the sand mold 1A has a plurality of cavities 10, it is sufficient that the feeder heads 4A have heating sections 42 corresponding to each of the plurality of cavities 10.

[0062] In the sand mold 1B according to the second embodiment, one riser 4B is provided for each of three cavities 10.

[0063] A sand mold 1B according to a second embodiment will be described below with reference to Fig. 9. In the second embodiment, the configuration different from the first embodiment will be mainly described.

[0064] Fig. 9 is a top view of a sand mold 1B according to embodiment 2. For ease of understanding, Fig. 9 omits the upper and lower molds and the core 2.

[0065] As shown in FIG. 9, the sand mold 1B has three cavities 10 and one riser 4B connected to the three cavities 10.

[0066] Each of the cavities 10 is formed to have the same shape and size as the cavity 10 described in embodiment 1. The cavities 10 are arranged at 120° intervals clockwise around the center C shown in Figure 9, at a fixed distance from the center C. Although not shown in Figure 9, a weir 3 is adjacent to each of the cavities 10, in the same relative positional relationship as described in embodiment 1. Furthermore, although not shown in Figure 9, each of the weirs 3 is connected to a supply portion 41 (not shown in Figure 9) of the feeder portion 4B.

[0067] Although not shown in FIG. 9 , the feeder 4B has three opposing portions 43 of the heating portion 42 described in the first embodiment, the same number as the number of cavities 10. Each opposing portion 43 faces the weir 3 in the same relative positional relationship as described in the first embodiment. Furthermore, each opposing portion 43 faces the end of the top surface 14 of the base plate forming portion 11 (not shown in FIG. 9 ) provided in each cavity 10. As a result, when the molten metal 300 is poured into the feeder 4B, the heat of the molten metal 300 warms the weir 3 and the end of the top surface 14 of the base plate forming portion 11, as described in the first embodiment. Therefore, shrinkage cavities are less likely to occur in each of the cavities 10 even in the sand mold 1B. As a result, a fixed scroll 100 with high strength can be cast even in the sand mold 1B.

[0068] As described above, in the sand mold 1B according to the second embodiment, the feeder portion 4B is provided with the opposing portion 43 of the heating portion 42 for each cavity 10, similar to that in the first embodiment. Therefore, in the sand mold 1B, like in the first embodiment, it is possible to prevent the occurrence of shrinkage cavities in the fixed scroll 100. As a result, the sand mold 1B can cast a fixed scroll 100 with high strength.

[0069] The sand mold 1B is an example of a mold or a mold system as defined in the present disclosure.

[0070] (Variation 1) The feeder 4B described above has a relatively large shape that extends from the center C to cover the outer periphery of each cavity 10. The feeder 4B may be provided with a cylindrical through-hole 44 as shown in Figure 9. In this case, the through-hole 44 may be cylindrical or may be prismatic, for example, triangular.

[0071] The shape of the feeder 4B in top view may be an arc shape that follows the outer periphery of the base plate forming part 11 of each cavity 10, and in this case, the arc shape may overlap the outer periphery of the base plate forming part 11. The space between the cavities 10 may be either linear or curved.

[0072] (Variation 2) In the second embodiment, the feeder 4B is connected to one gate 5 by one runner 6. However, the relationship between the feeder 4B and the gate 5 is not limited to this. For example, the feeder 4B may be connected to one gate 5 by a plurality of runners 6.

[0073] Fig. 10 is a top view of a modified example of the sand mold 1B according to embodiment 2. As in Fig. 9, the upper and lower molds and the core 2 are omitted from Fig. 10 for ease of understanding.

[0074] As shown in FIG. 10 , the sand mold 1B may have six cavities 10. In this case, each of the cavities 10 may be positioned at a fixed distance from the center C, every 60° clockwise. The feeder 4B may have an annular shape, with each side recessed inward in an arc-like shape and the center hollowed out to form a hexagonal shape, when viewed from above. In this case, a gate 5 may be located at the center of the internal space of the annular feeder 4B when viewed from above. A runner 6 may extend from each of the cavities 10. More specifically, six runners 6 may extend from each of six supply ports 41 of the feeder 4B adjacent to the weirs 3 connected to each of the cavities 10 toward the gates 5. This configuration of the sand mold 1B allows the molten metal 300 to be poured into six cavities 10 from a single gate 5.

[0075] (Embodiment 3) In Embodiments 1 and 2, the feeder heads 4A and 4B cover the weir 3 and the end of the top surface 14 of the base plate forming portion 11 of the cavity 10. However, the feeder heads 4A and 4B are not limited to this.

[0076] The feeder sections 4A, 4B may comprise a supply section 41 connected to the weir 3 and supplying the molten metal 300 to the weir 3, and a heating section 42 located at a position spaced apart from the weir 3 and the end of the top surface 14 of the base plate forming section 11 adjacent to the weir 3 in a direction perpendicular to the top surface 14, and located at a position overlapping the weir 3 and the end of the top surface 14 when viewed from a direction perpendicular to the top surface 14, and which heats the weir 3 and the end of the top surface 14 with the heat of the molten metal 300 when the molten metal 300 flows in. Therefore, in the feeder sections 4A, 4B, the opposing portions 43 provided on the heating section 42 do not have to cover the weir 3 and the end of the top surface 14 from above.

[0077] The sand mold 1C according to the third embodiment has a riser 4C having an opposing portion 45 that covers the ends of the weir 3 and the top surface 14 from the front.

[0078] Hereinafter, a sand mold 1C according to a third embodiment will be described with reference to Figures 11 and 12. In the third embodiment, the configuration different from the first and second embodiments will be mainly described.

[0079] Fig. 11 is a front view of a sand mold 1C according to embodiment 3. Fig. 12 is a cross-sectional view taken along the line XII-XII shown in Fig. 11 .

[0080] 11 and 12, when the multiple cavities 10 of the sand mold 1C are arranged in the vertical and horizontal directions, the vertical direction is the Z axis, the horizontal direction is the X axis, and the direction perpendicular to the X and Z axes is the Y axis. This coordinate system will be referred to as appropriate in the following explanation.

[0081] 11, the sand mold 1C has four cavities 10. The plate surface of the base plate forming portion 11 of each cavity 10 faces the front-rear direction. A feeder portion 4C is provided on the base plate forming portion 11.

[0082] As shown in Figure 12, the feeder 4C is provided above the weir 3 provided at the upper end of the base plate forming portion 11. The bottom surface of the feeder 4C extends forward F from above the weir 3 and then bends downward. As a result, the bottom surface of the feeder 4C is lowered to a position spaced apart from the spiral body forming portion 12 of the cavity 10 by the wall thickness T3 of the core 2. As a result, the bottom surface of the feeder 4C overlaps the upper end of the weir 3 and the top surface 14 of the base plate forming portion 11 from the front F. In other words, the bottom surface of the feeder 4C has an opposing portion 45 that faces the weir 3 and the upper end of the top surface 14. The wall thickness T3 of the core 2 adjacent to the spiral body forming portion 12 may be the same as or different from the wall thicknesses T1 and T2 described in the first embodiment.

[0083] The relative positional relationship of the facing portion 45 with respect to the weir 3 and the upper end of the top surface 14 is the same as the relative positional relationship of the facing portion 43 with respect to the weir 3 and the end of the top surface 14 described in the first embodiment, except for the orientation of the facing portion 45. As a result, when the molten metal 300 is poured into the feeder portion 4C during casting, the heat of the molten metal 300 is transferred from the facing portion 45 through the core 2 to the weir 3 and the upper end of the top surface 14 of the base plate forming portion 11. As a result, in the sand mold 1C, the molten metal 300 at the weir 3 and the molten metal 300 flowing along the top surface 14 of the base plate forming portion 11 during casting is less likely to solidify than the molten metal 300 in other parts. As a result, the sand mold 1C can be replenished with molten metal 300 from the feeder portion 4C until all of the molten metal 300 solidifies. As a result, the sand mold 1C can prevent the occurrence of shrinkage cavities inside the cavity 10, and can cast a fixed scroll 100 with sufficient strength.

[0084] As described above, in the sand mold 1C according to the third embodiment, as in the first embodiment, the facing portion 45 of the feeder 4C can heat the weir 3 and the end of the top surface 14 of the base plate forming portion 11 with the heat of the molten metal 300 during casting, thereby improving heat retention. As a result, as in the first embodiment, the sand mold 1C can prevent the occurrence of shrinkage cavities in the fixed scroll 100 and cast a fixed scroll 100 with high strength.

[0085] The sand mold 1C is an example of a mold or a mold system as defined in the present disclosure.

[0086] (Embodiment 4) As explained in embodiment 3, the feeder sections 4A, 4B may have a supply section 41 connected to the weir 3 and supplying the molten metal 300 to the weir 3, and a heating section 42 that is provided at a position spaced apart from the weir 3 and the end of the top surface section 14 of the base plate forming section 11 adjacent to the weir 3 in a direction perpendicular to the top surface section 14 and that overlaps the weir 3 and the end of the top surface section 14 when viewed from the direction perpendicular to the top surface section 14, and that warms the weir 3 and the end of the top surface section 14 with the heat of the molten metal 300 when the molten metal 300 flows in.

[0087] In the sand mold 1D according to the fourth embodiment, the riser portion 4D has an opposing portion 43 that faces the ends of the weir 3 and the top surface portion 14 below the ends of the weir 3 and the top surface portion 14.

[0088] A sand mold 1D according to the fourth embodiment will be described below with reference to Fig. 13. In the fourth embodiment, the configuration different from the first to third embodiments will be mainly described.

[0089] Fig. 13 is a cross-sectional view of a sand mold 1D according to embodiment 4. Note that Fig. 13 shows a cross-sectional view taken along the same line as the VII-VII line shown in Fig. 6.

[0090] 13, the cavity 10 of the sand mold 1D according to the fourth embodiment is arranged vertically symmetrically to the cavity 10 described in the first embodiment. Specifically, in the cavity 10 of the sand mold 1D, the base plate forming portion 11 is arranged on the upper side and the spiral body forming portion 12 is arranged on the lower side. The top surface portion 14 and the bottom surface portion 15 of the base plate forming portion 11 extend toward the outer periphery, and the weir 3 is connected to the end of the extension.

[0091] The weir 3 is formed to have the same shape and size as those described in embodiment 1. As a result, the weir 3 extends horizontally, specifically in the X direction, from the outer periphery of the base plate forming part 11. The weir 3 is connected at its extension to the supply part 41 of the feeder part 4D described in embodiment 1.

[0092] Unlike the feeder section 4A described in embodiment 1, a heating section 42 is arranged below the supply section 41. More specifically, in the feeder section 4D, the supply section 41 is provided horizontally to the weir 3 and the base plate forming section 11 of the cavity 10. Furthermore, the heating section 42 is provided below the weir 3 and the base plate forming section 11 by the wall thickness T2 of the core 2.

[0093] The heating section 42 protrudes further than the supply section 41 toward the side where the spiral body forming section 12 of the cavity 10 is located, i.e., toward the +X side. The shape of the heating section 42 is a trapezoid whose upper and lower sides extend in the X direction when viewed in an XZ cross section. The protruding length of the heating section 42 is such that the +X end of the heating section 42 reaches a position separated from the spiral body forming section 12 of the cavity 10 by the wall thickness T2 of the core 2. As a result, the +Z surface of the heating section 42 is horizontal and faces the weir 3 and the top surface 14 of the base plate forming section 11. That is, the heating section 42 has a facing portion 43. As a result, when the molten metal 300 is poured into the feeder section 4D, the heat of the molten metal 300 warms the weir 3 and the end of the top surface 14 of the base plate forming section 11, as in the case described in Embodiments 1-3. Therefore, even in the sand mold 1D, shrinkage cavities are unlikely to occur in each cavity 10. As a result, even in the sand mold 1D, a fixed scroll 100 with high strength can be cast.

[0094] As described above, in the sand mold 1D according to the fourth embodiment, the cavity 10 is vertically symmetrical to that in the first embodiment. As a result, the spiral body forming portion 12 is disposed below the base plate forming portion 11, and the top surface 14 of the base plate forming portion 11 faces downward. The top surface 14 extends horizontally. In contrast, the feeder 4D protrudes below the weir 3 and the base plate forming portion 11. Therefore, in the sand mold 1D according to the fourth embodiment, as in the first embodiment, the feeder 4D can heat the ends of the weir 3 and the top surface 14 of the base plate forming portion 11 with the heat of the molten metal 300 during casting, thereby improving heat retention. As a result, the sand mold 1D, like the first embodiment, can prevent the occurrence of shrinkage cavities in the fixed scroll 100 and cast a fixed scroll 100 with high strength.

[0095] (Modification) In the fourth embodiment, the heating unit 42 may be disposed not only below the supply unit 41 but also above the supply unit 41. Furthermore, in the cavity 10, the spiral body forming unit 12 may be disposed above the base plate forming unit 11, as in the first embodiment.

[0096] Fig. 14 is a cross-sectional view of a modified example of the sand mold 1D according to embodiment 4. Like Fig. 13, Fig. 14 shows a cross-sectional view taken along the same line as the VII-VII line shown in Fig. 6.

[0097] 14, the sand mold 1D may include a cavity 10 in which the spiral body forming section 12 is disposed above the base plate forming section 11. As a result, the top surface 14 of the base plate forming section 11 may face upward. In this case, the feeder section 4D may include a heating section 42 provided above the supply section 41, as in the first embodiment, and a heating section 46 provided below the supply section 41, as in the fourth embodiment.

[0098] When the sand mold 1D has such a configuration, it is preferable that the heating section 42 protrudes in the +X direction from the supply section 41, so that the heating section 42 has an opposing portion 43 that faces the ends of the top surface 14 of the base plate forming section 11 of the weir 3 and the cavity 10. It is also preferable that the heating section 46 protrudes in the +X direction from the supply section 41, so that the heating section 46 has an opposing portion 47 that faces the ends of the bottom surface 15 of the base plate forming section 11 of the weir 3 and the cavity 10. This is because, with such a configuration, the heating sections 42 and 46 can heat the weir 3 and the ends of the top surface 14 of the base plate forming section 11 from above and below with the heat of the molten metal 300 during casting, thereby improving heat retention.

[0099] The heating unit 46 is an example of a second heating unit as defined in the present disclosure. The sand mold 1D is an example of a casting mold as defined in the present disclosure.

[0100] While the mold, mold system, and member manufacturing method according to the embodiments of the present disclosure have been described above, the mold, mold system, and member manufacturing method are not limited to this.

[0101] For example, in the embodiment 1-4, the sand mold 1A-1D has a plurality of cavities 10 and can cast a plurality of fixed scrolls 100, but the sand mold 1A-1D is not limited to this. The sand mold 1A-1D only needs to have at least one cavity 10. And it only needs to be able to cast the same number of fixed scrolls 100 as the cavities 10.

[0102] Fig. 15 is a top view of a modified example of the sand mold 1A according to embodiment 1. The directions of the X, Y, and Z axes in the orthogonal coordinate system XYZ shown in Fig. 15 are the same as those in the orthogonal coordinate system XYZ shown in Figs. 4 to 7. The same also applies to Figs. 16 and 17, which will be described later.

[0103] 15, the sand mold 1A may have one cavity 10 and one feeder portion 4A. Naturally, even in this configuration, it is possible to prevent the occurrence of shrinkage cavities and manufacture a fixed scroll 100 with high strength.

[0104] In addition, in embodiments 1-4, sand molds 1A-1D have only one dam 3 for each cavity 10, but the number of dams 3 is arbitrary as long as the positional relationship with the opposing portions 43, 45 of feeder portions 4A-4D is maintained.

[0105] FIG. 16 is a top view of another modified example of the sand mold 1A according to the first embodiment.

[0106] As shown in Figure 16, the sand mold 1A may have three dams 3. In this way, the sand molds 1A-1D may have a plurality of dams 3. Even in such a configuration, as long as the positional relationship between the opposing portions 43, 45 of the feeder heads 4A-4D is maintained, it is possible to prevent the occurrence of shrinkage cavities and manufacture a fixed scroll 100 with high strength. In this case, it is preferable that the width W2 of the dams 3 is small so that they can be easily removed after casting.

[0107] FIG. 17 is a top view of yet another modified example of the sand mold 1A according to the first embodiment.

[0108] As shown in Figure 17, the sand mold 1A may have two weirs 3. In this case, it is preferable that one weir 3 is provided on each outer periphery of the disk-shaped base plate forming portion 11 of the cavity 10, and that the two weirs 3 face each other across the center of the base plate forming portion 11. It is also preferable that the same number of feeder portions 4A as the number of weirs 3 are provided, and that the heating portion 42 of each feeder portion 4A faces the weir 3 and the end of the base plate forming portion 11 connected to that weir 3. This is because, in this configuration, each weir 3 can prevent the occurrence of shrinkage cavities.

[0109] Furthermore, in embodiments 1-4, the facing portions 43, 45, and 47 are arranged parallel to the weir 3 and face each other. Furthermore, the facing portions 43, 45, and 47 are arranged parallel to and face the end of the top surface portion 14. However, the facing portions 43, 45, and 47 are not limited to this. In the present disclosure, the feeder portions 4A-4D are provided at positions spaced apart from the weir 3 and the end of the top surface portion 14 of the base plate forming portion 11 adjacent to the weir 3 in a direction perpendicular to the top surface portion 14, and are provided at positions overlapping the weir 3 and the end of the top surface portion 14 when viewed from a direction perpendicular to the top surface portion 14, and include a heating portion 42 that warms the weir 3 and the end of the top surface portion 14 with the heat of the molten metal 300 when the molten metal 300 flows in. Therefore, the facing portions 43, 45, and 47 do not have to be parallel to the weir 3 and the end of the top surface portion 14. The facing portions 43, 45, 47 may be inclined with respect to the ends of the weir 3 and the top surface portion 14. For example, the facing portions 43, 45, 47 may be inclined so that the distance between them and the weir 3 or the top surface portion 14 increases as they move away from the weir 3 toward the side where the top surface portion 14 is located. With such an inclination, the portions closer to the weir 3 from the top surface portion 14 become warmer during casting, which can prevent the occurrence of shrinkage cavities. Furthermore, the facing portions 43, 45, 47 do not need to be flat, and may be uneven or curved.

[0110] In embodiment 1-4, sand mold 1A-1D casts fixed scroll 100, i.e., a scroll member. However, the object to be cast by sand mold 1A-1D is not limited to this. Sand mold 1A-1D may be any mold that can cast a member having a plate-shaped portion and a protrusion that protrudes from one surface of the plate-shaped portion. Therefore, sand mold 1A-1D may be any mold that can cast a member that satisfies these conditions.

[0111] FIG. 18 is a perspective view of a heat sink 7 that is the object of manufacturing a sand mold according to another embodiment.

[0112] 18, the heat sink 7 includes a support plate 71 and a plurality of pin-shaped fins 72 arranged in a matrix. In the present disclosure, the heat sink 7 may be cast using the sand molds 1A-1D. In this case, the support plate 71 is cast by applying the base plate forming portion 11 of the cavity 10 included in the sand molds 1A-1D, and the plurality of fins 72 may be cast by replacing the spiral body forming portion 12 of the cavity 10 with a fin forming portion.

[0113] The fins 72 may be formed in the shape of a pin, a flat plate, a corrugated plate, an arc-shaped plate, or a plate curved into a quadratic curve, and the end faces of the plate may be supported by the support plate 71. When the fins 72 are flat or corrugated, the fins 72 may be arranged parallel to each other. When the fins 72 are flat or curved, the fins 72 may be arranged so that their surfaces extend radially from the center of the surface of the support plate 71.

[0114] As described above, the mold, mold system, and manufacturing method of the member are not limited to the above-described embodiments, and various modifications and substitutions can be made. Various embodiments of the present disclosure are described below as appendices.

[0115] (Note 1) A mold for casting a member having a plate-like portion and a protruding portion protruding from one plate surface of the plate-like portion, the mold including: a cavity that includes a first surface portion for forming an end surface of the plate-like portion and a second surface portion for forming either one of the plate surfaces or the other plate surface of the plate-like portion, into which molten metal flows and into which the plate-like portion and the protruding portion are cast when the molten metal solidifies; and a weir that is provided adjacent to the first surface portion from the outside of the cavity and that allows the molten metal to flow into the cavity. a feeder section connected to the weir and supplying the molten metal to the weir, and a heating section provided at a position spaced from the weir and an end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section and overlapping the weir and the end of the second surface section when viewed from the direction perpendicular to the second surface section, the heating section heating the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in. (Appendix 2) The mold according to Appendix 1, further comprising: a main mold forming a portion for casting the plate-shaped portion; and a core forming a portion for casting the protruding portion and the second surface section, wherein the cavity is formed by the main mold and the core, and the heating section is adjacent to the core and separated from the cavity by a thickness from the outer periphery of the core to the cavity. (Appendix 3) The casting mold according to Appendix 2, wherein at least the core of the main mold and the core is a sand mold. (Appendix 4) The casting mold according to any one of Appendixes 1 to 3, wherein the width of the weir when viewed from a direction perpendicular to the second surface portion is smaller than that of the heating portion. (Appendix 5) The casting mold according to any one of Appendixes 1 to 4, wherein the second surface portion extends in a horizontal direction, and the heating portion covers the second surface portion and the weir. (Appendix 6) The casting mold according to any one of Appendixes 1 to 4, wherein the second surface portion extends in a horizontal direction, and the heating portion protrudes below the second surface portion and the weir. (Appendix 7) The casting mold according to any one of Appendixes 1 to 6, wherein the second surface portion extends in a vertical direction, and the heating portion is horizontally adjacent to the second surface portion and the weir.(Appendix 8) The mold according to any one of Appendices 1 to 7, further comprising a second heating section that is provided on the side of the weir opposite to the side on which the heating section is provided, that is separated from the weir and the end of the second surface section and that is located at a position that overlaps the weir and the end of the second surface section when viewed from a direction perpendicular to the second surface section, and that warms the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in. (Appendix 9) The mold according to any one of Appendices 1 to 8, wherein the member is a fixed scroll or an orbiting scroll of a scroll compressor, the plate-like section is a base plate provided on the fixed scroll or the orbiting scroll, and the protruding section is a spiral body provided on the fixed scroll or the orbiting scroll and protruding from one plate surface of the base plate. (Appendix 10) The mold according to any one of Appendices 1 to 8, wherein the member is a heat sink, the plate-like portion is a support plate provided on the heat sink, and the protruding portion is a fin provided on the heat sink, supported by the support plate, and protruding from one plate surface of the support plate. (Appendix 11) A plurality of molds each for casting a member having a plate-like portion and a protruding portion protruding from one plate surface of the plate-like portion, comprising: a cavity into which molten metal flows and which casts the plate-like portion and the protruding portion when the molten metal solidifies, the cavity including a first surface portion for forming an end surface of the plate-like portion and a second surface portion for forming either one of the plate surfaces or the other plate surface of the plate-like portion; a weir provided adjacent to the first surface portion from the outside of the cavity, for allowing the molten metal to flow into the cavity; a plurality of casting molds each comprising: a supply section connected to the weir and supplying the molten metal to the weir; and a feeder section provided at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section, and at a position overlapping the weir and the end of the second surface section when viewed in the direction perpendicular to the second surface section, the feeder section having a heating section that heats the weir and the end of the second surface section with heat from the molten metal when the molten metal flows into the weir; and a runner connecting the feeder section to a sprue of each of the casting molds.(Supplementary Note 12) A mold for casting a member having a plate-like portion and a protruding portion protruding from one plate surface of the plate-like portion, comprising: a cavity that includes a first surface portion for forming an end surface of the plate-like portion and a second surface portion for forming either one of the plate surfaces or the other plate surface of the plate-like portion, into which molten metal flows and into which the plate-like portion and the protruding portion are cast when the molten metal solidifies; and a weir that is provided adjacent to the first surface portion from the outside of the cavity and that allows the molten metal to flow into the cavity. a feeder section connected to the weir and configured to feed the molten metal to the weir; a feeder section provided at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section and overlapping the weir and the end of the second surface section when viewed from the direction perpendicular to the second surface section, the feeder section having a heating section that heats the weir and the end of the second surface section with heat from the molten metal when the molten metal flows into the weir; and a sprue connected to the feeder section,

[0116] The present disclosure allows various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Furthermore, the above-described embodiments are intended to explain the present disclosure and do not limit the scope of the present disclosure. That is, the scope of the present disclosure is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and within the meaning of the disclosure equivalent thereto are considered to be within the scope of the present disclosure.

[0117] This application is based on Japanese Patent Application No. 2023-093252, filed on June 6, 2023. The entire specification, claims, and drawings of Japanese Patent Application No. 2023-093252 are incorporated herein by reference.

[0118] 1A-1D sand mold, 2 core, 3 weir, 4A-4D feeder portion, 5 sprue, 6 runner, 7 heat sink, 10 cavity, 11 base plate forming portion, 12 spiral body forming portion, 13 end surface portion, 14 top surface portion, 15 bottom surface portion, 41 supply portion, 42 heating portion, 43 opposing portion, 44 penetration portion, 45 opposing portion, 46 heating portion, 47 opposing portion, 71 support plate, 72 fin, 100 fixed scroll, 110 base plate, 120 spiral body, 200 orbiting scroll, 210 base plate, 220 spiral body, 230 cylindrical portion, 300 molten metal, 310 feeder portion, C center, D depth, F front, L distance, T1-T3 wall thickness, W, W1, W2 width, R1 scroll diameter, R2 diameter.

Claims

1. A mold for casting a member having a plate-shaped portion and a protruding portion protruding from one plate surface of the plate-shaped portion, a cavity including a first surface portion for forming an end surface of the plate-shaped portion, a second surface portion for forming one of the plate surfaces of the plate-shaped portion and the other plate surface, and a protrusion casting portion for forming the protrusion, wherein molten metal flows into the cavity and, when the molten metal solidifies, the cavity casts the plate-shaped portion and the protrusion; a weir provided adjacent to the first surface portion from outside the cavity, for allowing the molten metal to flow into the cavity; a feeder section including a supply section connected to the weir and supplying the molten metal to the weir; and a heating section provided at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section, and at a position overlapping the weir and the end of the second surface section when viewed from the direction perpendicular to the second surface section, but not overlapping with the protrusion casting section when viewed from the direction perpendicular to the second surface section, and for heating the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in; Equipped with template.

2. a master mold for forming a portion for casting the plate-shaped portion; a core that forms the protrusion casting portion and the second surface portion; Furthermore, the cavity is formed by the main mold and the core, The heating portion is adjacent to the core and is separated from the cavity by a thickness from the outer periphery of the core to the cavity. The mold of claim 1.

3. Of the main mold and the core, at least the core is a sand mold. The mold of claim 2.

4. The width of the weir when viewed from a direction perpendicular to the second surface portion is smaller than that of the heating portion. The mold of claim 1.

5. The second surface portion extends in a horizontal direction, The heating unit covers the second surface unit and the weir. The mold of claim 1.

6. The second surface portion extends in a horizontal direction, The heating portion protrudes below the second surface portion and the weir. The mold of claim 1.

7. The second surface portion extends in a vertical direction, The heating section is horizontally adjacent to the second surface section and the weir. The mold of claim 1.

8. The member is a fixed scroll or an orbiting scroll of a scroll compressor, the plate-shaped portion is a base plate provided in the fixed scroll or the orbiting scroll, The protrusion is a spiral body provided on the fixed scroll or the orbiting scroll and protruding from one plate surface of the base plate. A mold according to any one of claims 1 to 7.

9. the member is a heat sink, the plate-shaped portion is a support plate included in the heat sink, The protrusion is a fin provided on the heat sink, supported by the support plate, and protruding from one plate surface of the support plate. A mold according to any one of claims 1 to 7.

10. The second surface portion forms one of the plate surfaces of the plate-shaped portion, The protrusion casting protrudes from the second surface, The heating portion faces the protrusion casting portion in the extension direction of the second surface portion, A mold according to any one of claims 1 to 7.

11. A mold for casting a member having a plate-like portion and a protrusion protruding from one plate surface of the plate-like portion, a cavity including a first surface portion for forming an end surface of the plate-shaped portion and a second surface portion for forming one of the plate surfaces of the plate-shaped portion, the cavity into which molten metal flows and into which the plate-shaped portion and the protrusion are cast when the molten metal solidifies; a weir provided adjacent to the first surface portion from outside the cavity, for allowing the molten metal to flow into the cavity; a feeder section including: a supply section connected to the weir and supplying the molten metal to the weir; and a heating section provided at a position spaced apart from the weir and an end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section and at a position overlapping the weir and the end of the second surface section when viewed in the direction perpendicular to the second surface section, the heating section heating the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in; a second heating section that is provided on the side of the weir opposite to the side on which the heating section is provided, that is separated from the weir and the end of the second surface section, and that is provided at a position that overlaps the weir and the end of the second surface section when viewed from a direction perpendicular to the second surface section, and that heats the weir and the end of the second surface section with the heat of the molten metal when the molten metal flows in; Equipped with template.

12. A plurality of molds each for casting a member having a plate-like portion and a protrusion protruding from one plate surface of the plate-like portion, a cavity including a first surface portion for forming an end surface of the plate-shaped portion, a second surface portion for forming one of the plate surfaces of the plate-shaped portion and the other plate surface, and a protrusion casting portion for forming the protrusion, wherein molten metal flows into the cavity and, when the molten metal solidifies, the cavity casts the plate-shaped portion and the protrusion; a weir provided adjacent to the first surface portion from outside the cavity, for allowing the molten metal to flow into the cavity; a feeder section including a supply section connected to the weir and supplying the molten metal to the weir; and a heating section provided at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section, and at a position overlapping the weir and the end of the second surface section when viewed from the direction perpendicular to the second surface section, but not overlapping with the protrusion casting section when viewed from the direction perpendicular to the second surface section, and for heating the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in; a plurality of molds comprising: a runner connecting the riser portion and a sprue of each of the molds; Equipped with Mold system.

13. A mold for casting a member having a plate-shaped portion and a protruding portion protruding from one plate surface of the plate-shaped portion, a cavity including a first surface portion for forming an end surface of the plate-shaped portion, a second surface portion for forming one of the plate surfaces of the plate-shaped portion and the other plate surface, and a protrusion casting portion for forming the protrusion, wherein molten metal flows into the cavity and, when the molten metal solidifies, the cavity casts the plate-shaped portion and the protrusion; a weir provided adjacent to the first surface portion from outside the cavity, for allowing the molten metal to flow into the cavity; a feeder section including a supply section connected to the weir and supplying the molten metal to the weir; and a heating section provided at a position spaced apart from the weir and the end of the second surface section adjacent to the weir in a direction perpendicular to the second surface section, and at a position overlapping the weir and the end of the second surface section when viewed from the direction perpendicular to the second surface section, but not overlapping with the protrusion casting section when viewed from the direction perpendicular to the second surface section, and for heating the weir and the end of the second surface section with heat from the molten metal when the molten metal flows in; a sprue connected to the riser portion; a casting process in which the molten metal is poured from the sprue of the mold to fill the cavity, the weir, and the riser portion with the molten metal, and the molten metal is solidified. Manufacturing method of components.