Casting mold device

Abstract

The present invention relates to a mold apparatus for producing a cylinder head having a spark plug mounting portion, comprising: a lower mold; an upper mold configured to be attached to or detached from the lower mold; a plurality of core pin assemblies mounted in the upper mold to form a spark plug mounting portion, and having a cooling air flow path formed therein; a cooling unit mounted on the upper mold and including a cooling air inlet portion and a cooling air outlet portion respectively connected to the cooling air flow path of the core pin assembly; and a sealing unit coupled to the cooling unit and the upper mold to seal a portion between the core pin assembly and the cooling unit.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0123694 filed in the Korean Intellectual Property Office on September 18, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of the present invention relate to a casting mold device, and more particularly, to a casting mold device capable of producing engine parts of a vehicle. Background Art

[0004] In general, a casting process refers to a manufacturing process for producing a product having a predetermined shape by injecting molten metal into a casting mold and changing the phase of the molten metal into a solid state (e.g., solidifying the molten metal). For example, a component of a vehicle engine, such as a cylinder head, can be manufactured by a high-pressure or low-pressure casting process using molten aluminum.

[0005] Examples of the casting process may include a low-pressure casting process that uses low-pressure compressed air from a holding furnace disposed below a casting mold to push molten metal up along a rod to a portion between an upper mold and a lower mold and then solidifies the molten metal.

[0006] A casting mold device for producing a cylinder head by using a low pressure casting process is equipped with a core pin disposed in an upper mold to form a spark plug mounting hole in the cylinder head. The core pin is installed in an upper molding portion of the upper mold.

[0007] Furthermore, the casting mold apparatus is equipped with a cooling unit configured to cool the core pin by allowing a cooling medium to flow around the core pin during the casting process.

[0008] In this case, the cooling unit may cool the core pin using a cooling medium as a coolant and flow the coolant around the core pin.

[0009] However, when coolant is used, the core pin may be overcooled, which may reduce the quality of the cylinder head product. In addition, the coolant may leak from the core pin, which may cause a safety accident during the casting process.

[0010] Therefore, a cooling unit that uses cooling air as a cooling medium and flows the cooling air around the core pin is applied.

[0011] However, in order to simplify the structure, the casting mold apparatus adopting the air-cooling cooling unit does not have a separate discharge structure configured to discharge cooling air, and the casting mold apparatus discharges the cooling air through a gap between the cooling unit and the core pin.

[0012] Therefore, since the cooling air is discharged through the gap between the cooling unit and the core pin, exhaust noise is generated. Such exhaust noise may deteriorate the working environment of the operator, such as causing hearing loss of the operator.

[0013] In addition, the core pin adopting the air-cooling cooling unit is configured as an integrated type. Since the core pin is in contact with the molten metal for a long time, the core pin is damaged even if the core pin is cooled, and for this reason, replacing the core pin may require excessive costs.

[0014] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the invention

[0015] The present invention provides a casting mold device capable of minimizing exhaust noise of cooling air generated when a core pin is cooled by the cooling air.

[0016] An embodiment of the present invention provides a casting mold device configured to produce a cylinder head having a spark plug mounting portion. The casting mold device includes: a lower mold and an upper mold capable of being attached to or detached from the lower mold. The casting mold device also includes: i) a plurality of core pin assemblies installed in the upper mold to form a spark plug mounting portion and having a cooling air flow path formed therein; ii) a cooling unit installed on the upper mold and including a cooling air inlet portion and a cooling air outlet portion respectively connected to the cooling air flow path of the core pin assembly; and iii) a sealing unit coupled to the cooling unit and the upper mold to seal the portion between the core pin assembly and the cooling unit.

[0017] In another embodiment, the cooling unit includes a cooling air discharge module connected to the cooling air outlet portion.

[0018] In one embodiment of the present invention, the sealing unit includes: a sealing plate disposed between the core pin assembly and the cooling unit; and a plurality of sealing fastening members configured to fasten the cooling unit and the sealing plate, and to fasten the sealing plate and the upper mold.

[0019] Another embodiment of the present invention provides a casting mold device, including a lower mold and an upper mold that can be attached to or detached from the lower mold. The casting mold device also includes: a plurality of core pin assemblies installed in the upper mold and including a plurality of separation pins that can be configured to be combined with or separated from each other. Specifically, the plurality of core pin assemblies include a cooling air flow path formed in the plurality of separation pins combined with each other. The casting mold device also includes: a cooling unit installed on the upper mold and connected to the cooling air flow path to inject and discharge cooling air; and a sealing unit coupled to the cooling unit and the upper mold to seal the portion between the core pin assembly and the cooling unit.

[0020] In another embodiment of the present invention, core pin assemblies are respectively installed in pin insertion holes formed in an upper mold in an up-and-down direction to form a spark plug mounting portion of a cylinder head.

[0021] In another embodiment of the present invention, each of the plurality of separation pins includes: a cylindrical plug housing assembled with a pin insertion hole formed in an upper mold in an up-down direction. Specifically, the cylindrical plug housing is open at its upper and lower ends. Each of the separation pins includes: a plug pin assembled with the cylindrical plug housing, coupled to the lower portion of the cylindrical plug housing, and having an open upper end and a closed lower end; and a plug bushing assembled with the cylindrical plug housing to be arranged above the plug pin, coupled to the upper portion of the cylindrical plug housing, and having a cylindrical shape with an open upper and lower end.

[0022] In one embodiment of the present invention, the cylindrical plug housing includes: a housing outer flange formed on the outer periphery of the upper end thereof, and a housing inner flange formed on the inner periphery of the lower end thereof.

[0023] In one embodiment of the present invention, the plug bushing includes: a bushing outer flange formed on an outer circumference of an upper end thereof.

[0024] In one embodiment of the present invention, the housing outer flange and the bushing outer flange are fastened by a plurality of bolts.

[0025] In one embodiment of the present invention, the housing inner flange is coupled to the pin outer flange formed at the upper end of the plug pin through a locking protrusion.

[0026] In another embodiment of the present invention, the cooling unit includes: a plurality of cover blocks, which are arranged at positions corresponding to the core pin assemblies and respectively have cooling air inlet portions and cooling air outlet portions; a cooling pipe, which is connected to the cooling air inlet portions of the plurality of cover blocks and is arranged in a cooling air flow path; and a cooling air discharge module, which is connected to the cooling air outlet portions of the plurality of cover blocks.

[0027] In one embodiment of the present invention, the cooling unit includes cooling air inlet pipes each connected to one side of each cooling air inlet portion of the plurality of cover blocks.

[0028] In one embodiment of the present invention, the cooling pipes are each connected to the other side of each cooling air inlet portion by tapping.

[0029] In one embodiment of the present invention, the cooling air discharge module includes: a connection pipe connected to the cooling air outlet portions of the plurality of cover blocks; an exhaust housing connected to the connection pipe; and an exhaust pipe connected to the exhaust housing.

[0030] In one embodiment of the present invention, the exhaust pipe extends toward one side edge of the upper bracket coupled to the upper mold.

[0031] In one embodiment of the present invention, the cooling air flow path includes: a flow path groove formed in the plug pin, and a hollow portion of the plug bushing connected to the flow path groove.

[0032] In one embodiment of the present invention, the cooling unit includes: a plurality of cover blocks, which are respectively arranged at positions corresponding to the core pin assemblies and respectively have cooling air inlet portions and cooling air outlet portions; and a cooling pipe, which is connected to the cooling air inlet portions of the plurality of cover blocks and is arranged in the plug bushing and the plug pin.

[0033] In one embodiment of the present invention, the at least one cooling air flow path includes: a cooling air discharge flow path formed between the outer periphery of the cooling pipe, the inner periphery of the plug bushing and the inner periphery of the plug pin. The cooling air discharge flow path is connected to the cooling pipe and the cooling air outlet portion.

[0034] In one embodiment of the present invention, the sealing unit includes: a sealing plate disposed between a core pin assembly and a plurality of cover blocks; and a plurality of sealing fastening members configured to fasten the plurality of cover blocks and the sealing plate, and to fasten the sealing plate and the upper mold.

[0035] In one embodiment of the present invention, the seal fastening members respectively include seal fastening bolts.

[0036] According to the casting mold device of the embodiment of the present invention, the exhaust noise of the cooling air used to cool the core pin assembly can be minimized, thereby improving the working environment of the operator and preventing the hearing of the operator from being damaged.

[0037] Other effects that can be obtained or expected by the embodiments of the present invention should be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. In other words, various effects expected by the embodiments of the present invention are disclosed in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are provided for reference in order to describe the embodiments of the present invention, and thus the technical spirit of the present invention should not be interpreted as being limited to the accompanying drawings, wherein:

[0039] Figure 1 is a block configuration diagram schematically showing a casting mold device according to an embodiment of the present invention;

[0040] Figure 2 is a view schematically showing an example of a cylinder head produced by a casting mold apparatus according to an embodiment of the present invention;

[0041] Figure 3 is a perspective view showing a casting mold device according to an embodiment of the present invention;

[0042] Figure 4is a top view showing a casting mold device according to an embodiment of the present invention;

[0043] Figure 5 is an exploded perspective view showing a casting mold device according to an embodiment of the present invention;

[0044] Figure 6 is a cross-sectional view showing a casting mold device according to an embodiment of the present invention;

[0045] Figure 7 are a perspective view and a cross-sectional view showing a core pin assembly applied to a casting mold device according to an embodiment of the present invention;

[0046] Figure 8 is an exploded perspective view showing a core pin assembly applied to a casting mold device according to an embodiment of the present invention;

[0047] Fig. 9 is a perspective view showing a cooling unit applied to a casting mold device according to an embodiment of the present invention;

[0048] Fig.10 is a cross-sectional view showing a cooling unit applied to a casting mold device according to an embodiment of the present invention;

[0049] Fig.11 and Fig.12 is a view showing a sealing unit applied to a casting mold device according to an embodiment of the present invention;

[0050] Fig.13 2 is a view showing the operation of the casting mold apparatus according to the embodiment of the present invention.

[0051] It should be understood that the drawings are not necessarily drawn to scale, but rather provide somewhat simplified representations of various features that illustrate the basic principles of the invention. For example, the specific design features of the present invention (including specific dimensions, orientations, locations, and shapes) should be determined in part by the specific intended application and use environment.

[0052] <Description of Reference Numerals>

[0053] 1: Cylinder head 3: Spark plug installation

[0054] 5: Molten metal 7: Cavity

[0055] 10: Lower die

[0056] 11: Lower support 13: Molten metal injection part

[0057] 15: Lower forming section 17: Insulation furnace

[0058] 20: Upper mold 21: Upper bracket

[0059] 25: Upper molding part 27: Pin insertion hole

[0060] 30: core pin assembly 30a: separation pin

[0061] 31: Plug housing 32, 52: Hollow portion

[0062] 33: Shell outer flange 35: Shell inner flange

[0063] 41: Plug pin 42: Flow path groove

[0064] 45: Pin outer flange 51: Plug bushing

[0065] 53: Bushing outer flange 55: Bolt

[0066] 57: Cooling air flow path 59: Cooling air exhaust flow path

[0067] 60: Cooling unit 61: Cover block

[0068] 63: Path connection part 65: Cooling air inlet part

[0069] 67: cooling air outlet 69: cooling air inlet pipe

[0070] 71: Cooling pipe 73: Self-tapping thread

[0071] 81: Cooling air discharge module 83: Connecting pipe

[0072] 85: Exhaust housing 87: Exhaust pipe

[0073] 90: Sealing unit 91: Sealing plate

[0074] 93: Sealing fastening member 95: Sealing fastening bolt

[0075] 100: Moulding device. DETAILED DESCRIPTION

[0076] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments. However, the present invention can be implemented in various different ways and is not limited to the embodiments described herein.

[0077] Parts irrelevant to the description have been omitted to clearly describe the present invention, and the same or similar constituent elements are denoted by the same reference numerals throughout the specification.

[0078] The size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of description, but the present invention is not necessarily limited thereto. In order to clearly describe several parts and regions, their thicknesses are exaggerated.

[0079] Furthermore, the terms “unit,” “part,” “member” and the like described in the specification refer to a unit of an integrated configuration that performs at least one function or operation.

[0080] When a component, device, element, etc. of the present invention is described as having a purpose or performing an operation, function, etc., the component, device or element should be considered herein as "configured to" satisfy that purpose or perform that operation or function.

[0081] The terms used in this specification are used to explain exemplary embodiments rather than to limit the present invention. Unless the context clearly dictates otherwise, singular expressions used herein are intended to include plural expressions.

[0082] It should be understood that the terms “include” and / or “comprising” used in this specification mean the existence of features, integers, steps, operations, constituent elements and / or parts, but do not exclude the existence or addition of one or more other features, integers, steps, operations, constituent elements, parts and / or their combinations.

[0083] The term "coupled" as used in this specification refers to a physical relationship between two components that are directly connected to each other or indirectly connected to each other through one or more intermediate components.

[0084] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0085] Figure 1 1 is a block configuration diagram schematically showing a casting mold device according to an embodiment of the present invention.

[0086] refer to Figure 1 The casting mold device 100 according to the embodiment of the present invention can be applied to a process of manufacturing a casting product having a desired shape by injecting molten metal made of aluminum, magnesium or an alloy thereof into a mold.

[0087] According to an embodiment of the present invention, the casting mold apparatus 100 may be applied to a process of manufacturing a component for a vehicle engine by using a casting process.

[0088] Furthermore, the casting mold apparatus 100 according to the embodiment of the present invention may be applied to a process of manufacturing a cylinder head for a vehicle engine by using a low pressure casting process.

[0089] In this case, if Figure 2 As shown, the cylinder head 1 produced by the casting mold device 100 includes a spark plug mounting portion 3 provided in the form of a hole, in which a plurality of spark plugs (not shown) are mounted.

[0090] Thus, the casting mold apparatus 100 according to the embodiment of the present invention is configured to produce the cylinder head 1 having the spark plug mounting portion 3 .

[0091] In this specification, reference directions for explaining the following components may be set to the front-rear direction, the left-right direction, and the up-down direction.

[0092] In addition, in this specification, terms such as "upper end portion", "upper part", "upper end" or "upper surface" of a component refer to the end portion, part, end or surface of the component set on the relatively upper side, and terms such as "lower end portion", "lower part", "lower end" or "lower surface" of a component refer to the end portion, part, end or surface of the component set on the relatively lower side.

[0093] In addition, in this specification, the end of a component (e.g., one end or the other end) refers to the end of the component in any direction, and the end of a component (e.g., one end or the other end) refers to a predetermined part of the component including the end of the component.

[0094] refer to Figure 1 and Figure 2 The casting mold device 100 according to the embodiment of the present invention basically includes a lower mold 10 and an upper mold 20 .

[0095] The lower mold 10 is disposed on the floor of a processing workplace and is mounted on a lower support 11. The lower mold 10 includes a molten metal injection portion 13 and a lower molding portion 15.

[0096] The molten metal pouring part 13 is disposed below the lower molding part 15. The molten metal pouring part 13 is connected to a holding furnace 17 disposed below the lower support 11.

[0097] The holding furnace 17 can contain the molten metal 5, push the molten metal 5 upward by using low-pressure compressed air, and inject the molten metal 5 into the molten metal injection part 13. The method of injecting the molten metal 5 into the molten metal injection part 13 at low pressure can be defined as a low-pressure casting process.

[0098] The lower molding part 15 is disposed at an upper side of the lower mold 10 and has a shape corresponding to the lower shape of the cylinder head 1. The lower molding part 15 may be connected to the molten metal injection part 13.

[0099] In addition, the upper mold 20 is installed at a position corresponding to the lower mold 10 and is configured to be movable in the up-down direction. The upper mold 20 is installed on an upper bracket 21 and is configured to be attached to or detached from the lower mold 10.

[0100] The upper mold 20 may be reciprocated in the up and down directions by a driving device known to those skilled in the art, such as a driving slide.

[0101] The upper mold 20 includes an upper molding portion 25. The upper molding portion 25 is provided at the lower side of the upper mold 20 and has a shape corresponding to the upper shape of the cylinder head 1.

[0102] Therefore, according to the casting mold apparatus 100 according to the embodiment of the present invention, when the lower mold 10 and the upper mold 20 are attached to each other, the lower molding part 15 and the upper molding part 25 may define the cavity 7 having a preset shape and volume.

[0103] Therefore, in the casting mold device 100 according to the embodiment of the present invention, when the molten metal 5 is injected into the cavity 7 through the molten metal injection part 13 , the cylinder head 1 having a preset shape may be produced through the lower molding part 15 and the upper molding part 25 .

[0104] According to an embodiment of the present invention, the mold device 100 includes a pin core structure configured to form a spark plug mounting portion 3 in the form of a hole in the cylinder head 1. In another embodiment, the mold device 100 includes a cooling structure configured to cool the pin core structure.

[0105] In this case, the cooling structure is configured to cool the pin-type core structure by using cooling air. The cooling structure may cool the pin-type core structure by flowing the cooling air to the pin-type core structure.

[0106] The casting mold apparatus 100 according to the embodiment of the present invention minimizes exhaust noise of cooling air generated when the pin core structure is cooled by the cooling air.

[0107] Figure 3 is a perspective view showing a casting mold device according to an embodiment of the present invention, Figure 4 2 is a top view showing a casting mold device according to an embodiment of the present invention, and Figure 5 is an exploded perspective view showing a casting mold device according to an embodiment of the present invention.

[0108] refer to Figures 1 to 5 , a casting mold device 100 according to an embodiment of the present invention includes a plurality of core pin assemblies 30 , a cooling unit 60 , and a sealing unit 90 .

[0109] In the embodiment of the present invention, the core pin assembly 30 is configured to form the spark plug mounting portion 3 in the cylinder head 1. The core pin assembly 30 is installed in the upper die 20.

[0110] The core pin assemblies 30 are provided in the upper mold 20 and are spaced apart from each other at a preset interval in the front-rear direction. The core pin assemblies 30 may be respectively installed in the pin insertion holes 27 formed in the upper mold 20 in the up-down direction. In this case, the pin insertion holes 27 penetrate the upper molding portion 25 from above the upper mold 20 in the up-down direction.

[0111] Figure 6 is a cross-sectional view showing a casting mold device according to an embodiment of the present invention, Figure 7 1 is a perspective view and a cross-sectional view showing a core pin assembly applied to a casting mold device according to an embodiment of the present invention, and Figure 8is an exploded perspective view showing a core pin assembly applied to a casting mold device according to an embodiment of the present invention.

[0112] refer to Figures 5 to 8 , the core pin assembly 30 according to the embodiment of the present invention includes a plurality of separation pins 30a that can be combined with and separated from each other.

[0113] The release pins 30 a each include a plug housing 31 , a plug pin 41 , and a plug bushing 51 .

[0114] In the embodiment of the present invention, the plug housing 31 is matched with the pin insertion hole 27 of the upper mold 20 in the up-down direction. The plug housing 31 may have a cylindrical shape having a hollow portion 32 opened at the upper and lower ends thereof.

[0115] The plug housing 31 may include an outer housing flange 33 and an inner housing flange 35 .

[0116] The housing outer flange 33 is formed on the outer circumference of the upper end portion of the plug housing 31. The housing outer flange 33 can support the upper surface of the upper mold 20. The housing inner flange 35 is formed on the inner circumference of the lower end portion of the plug housing 31.

[0117] In the embodiment of the present invention, the plug pin 41 is fitted with the hollow portion 32 of the plug housing 31 in the up-down direction and is coupled to the lower portion of the plug housing 31. In addition, the plug pin 41 protrudes downward from the pin insertion hole 27.

[0118] The plug pin 41 includes a flow path groove 42 which is open at an upper end thereof and closed at a lower end thereof. In another embodiment, the plug pin 41 includes a pin outer flange 45 formed on an outer periphery of an upper end portion of the plug pin 41.

[0119] In this case, the pin outer flange 45 of the plug pin 41 may be coupled to the housing inner flange 35 of the plug housing 31 through the locking protrusion.

[0120] Therefore, the plug pin 41 is coupled to the housing inner flange 35 through the pin outer flange 45 in the hollow portion 32 of the plug housing 31 so that the plug pin 41 can protrude downward from the pin insertion hole 27 in a state in which the plug pin 41 is coupled to the lower end of the plug housing 31 .

[0121] In an embodiment of the present invention, the plug bushing 51 may be disposed in the hollow portion 32 of the plug housing 31 and located above the plug pin 41 .

[0122] The plug bushing 51 is fitted with the hollow portion 32 of the plug housing 31 in the up-down direction and is coupled to the upper end of the plug housing 31. The plug bushing 51 may have a cylindrical shape having a hollow portion 52 opened at its upper and lower ends. In this case, the lower end of the plug bushing 51 contacts the upper end of the plug pin 41.

[0123] The plug bushing 51 includes a bushing outer flange 53 formed on the outer circumference of the upper end of the plug bushing 51. The bushing outer flange 53 may support the upper surface of the housing outer flange 33 of the plug housing 31.

[0124] The bushing outer flange 53 and the housing outer flange 33 are fastened in the up-down direction by a plurality of bolts 55. In addition, the plug pin 41 may be coupled to the housing inner flange 35 of the plug housing 31 through the pin outer flange 45 and the locking protrusion, and fixed by the plug bushing 51.

[0125] Therefore, the plug housing 31, the plug pin 41, and the plug bushing 51 can be installed in the pin insertion hole 27 of the upper mold 20 in a state where the plug housing 31, the plug pin 41, and the plug bushing 51 are combined with each other. In addition, the plug housing 31, the plug pin 41, and the plug bushing 51 combined with each other can be separated from each other in a state where the plug housing 31, the plug pin 41, and the plug bushing 51 are taken out of the pin insertion hole 27.

[0126] Furthermore, the core pin assembly 30 in which the plug housing 31 , the plug pin 41 , and the plug bushing 51 are coupled to each other each includes a cooling air flow path 57 formed in the up-down direction inside.

[0127] The cooling air flow path 57 may be defined by the flow path groove 42 of the plug pin 41 and the hollow portion 52 of the plug bushing 51 connected in the up-down direction in the hollow portion 32 of the plug housing 31 .

[0128] refer to Figures 3 to 6 In an embodiment of the present invention, the cooling unit 60 is configured to cool the core pin assembly 30 using cooling air by passing the cooling air through the cooling air flow path 57 of the core pin assembly 30 .

[0129] The cooling unit 60 is mounted on the upper mold 20 , connected to the cooling air flow path 57 of the core pin assembly 30 , and configured to inject and discharge cooling air.

[0130] Fig. 9 is a perspective view showing a cooling unit applied to a casting mold device according to an embodiment of the present invention, and Fig.10 is a cross-sectional view showing a cooling unit applied to a casting mold device according to an embodiment of the present invention.

[0131] refer to Fig. 9 and Fig.10 , the cooling unit 60 according to the embodiment of the present invention includes a plurality of cover blocks 61 , a cooling pipe 71 , and a cooling air discharge module 81 .

[0132] In the embodiment of the present invention, the cover blocks 61 are respectively provided in the form of blocks, and are arranged at positions on the upper mold 20 corresponding to the core pin assemblies 30 , respectively.

[0133] The cover blocks 61 each include a path connecting portion 63 , a cooling air inlet portion 65 , and a cooling air outlet portion 67 .

[0134] The path connection part 63 is connected to the cooling air flow path 57 of the core pin assembly 30. The path connection part 63 is formed in a groove shape in the lower portion of each cover block 61. In addition, the path connection part 63 is connected to a cooling air inlet part 65 and a cooling air outlet part 67 (to be described below).

[0135] The cooling air inlet portion 65 is configured to introduce cooling air into the cooling air flow path 57. The cooling air inlet portion 65 is provided in the form of a hole formed through an upper portion of each cover block 61 in the up-down direction and is connected to the path connection portion 63.

[0136] In addition, a cooling air inlet pipe 69 is connected to one side (upper part based on the drawing) of the cooling air inlet portion 65. The cooling air inlet pipe 69 may be connected to a cooling air supply portion (not shown).

[0137] Furthermore, the cooling air outlet portion 67 is configured to discharge cooling air from the cooling air flow path 57 to the outside. The cooling air outlet portion 67 is provided in the form of a hole formed through a substantially middle portion of each cover block 61 in the left-right direction and is connected to the path connection portion 63.

[0138] In this case, the groove cross-sectional area of ​​the path connection portion 63 is larger than the hole cross-sectional area of ​​each of the cooling air inlet portion 65 and the cooling air outlet portion 67 .

[0139] In the embodiment of the present invention, the cooling pipe 71 is connected to the cooling air inlet portion 65 of the cover block 61 and is disposed in the cooling air flow path 57 of the core pin assembly 30 .

[0140] The cooling pipe 71 is configured to inject cooling air introduced through the cooling air inlet pipe 69 into the cooling air flow path 57. Therefore, the cooling pipe 71 is provided in the flow path groove 42 of the plug pin 41 and the hollow portion 52 of the plug bushing 51.

[0141] The cooling pipe 71 is coupled to the other side (based on the lower part of the figure) of the cooling air inlet portion 65 through the path connection portion 63. In addition, the cooling pipe 71 is coupled to the other side of the cooling air inlet portion 65 by tapping. To this end, the cooling pipe 71 has a coupling end portion (based on the upper end portion of the figure), and a self-tapping thread 73 is formed on the other side of the cooling air inlet portion 65.

[0142] In this case, the cooling air flow path 57 of each core pin assembly 30 , in which the cooling pipe 71 is disposed, includes a cooling air discharge flow path 59 .

[0143] The cooling air discharge flow path 59 is formed between the outer circumference of the cooling pipe 71, the inner circumference of the plug bushing 51, and the inner circumference of the plug pin 41. The inner circumference of the plug bushing 51 may be defined as the inner circumferential surface of the hollow portion 52, and the inner circumference of the plug pin 41 may be defined as the inner circumferential surface of the flow path groove 42.

[0144] The cooling air discharge flow path 59 may be connected to the cooling pipe 71 , the path connection portion 63 , and the cooling air outlet portion 67 .

[0145] Furthermore, in the embodiment of the present invention, the cooling air discharge module 81 may be configured to discharge the cooling air flowing along the cooling air discharge flow path 59 to the outside through the cooling air outlet portion 67 .

[0146] The cooling air discharge module 81 is connected to the cooling air outlet portion 67 of the cover block 61. The cooling air discharge module 81 includes a connection pipe 83, an exhaust housing 85, and an exhaust pipe 87.

[0147] The connection pipe 83 is connected to the cooling air outlet portion 67 of the cover block 61. The exhaust housing 85 is configured to capture the cooling air discharged through the connection pipe 83. The exhaust housing 85 is connected to the connection pipe 83. The exhaust pipe 87 is connected to the exhaust housing 85.

[0148] In this case, if Figure 4 As shown, the exhaust pipe 87 may extend toward one side edge of the upper bracket 21 coupled to the upper mold 20. As an example, the exhaust pipe 87 may extend toward one side edge of the upper bracket 21 farthest from the operator.

[0149] refer to Figures 3 to 6 and Fig.10 In an embodiment of the present invention, the sealing unit 90 is configured to fix the cooling unit 60 connected to the core pin assembly 30 to the upper mold 20 and seal a portion between the core pin assembly 30 and the cooling unit 60 .

[0150] The sealing unit 90 is coupled to the cooling unit 60 and the upper mold 20 .

[0151] Fig.11 and Fig.12 2 is a view showing a sealing unit applied to a casting mold device according to an embodiment of the present invention.

[0152] refer to Fig.11 and Fig.12 , the sealing unit 90 according to the embodiment of the present invention includes a sealing plate 91 and a plurality of sealing fastening members 93 .

[0153] The sealing plate 91 is disposed between an upper portion of the core pin assembly 30 and the cover block 61 of the cooling unit 60 .

[0154] In this case, the lower portion of the cover block 61 may be supported by the upper surface of the sealing plate 91. Fig.10 As shown, the lower surface of the sealing plate 91 may support the bushing outer flange 53 of the plug bushing 51 that is fastened to the housing outer flange 33 of the plug housing 31 by a plurality of bolts 55 .

[0155] The plurality of seal fastening members 93 are configured to fasten the cover block 61 and the seal plate 91 , and fasten the seal plate 91 and the upper portion of the upper mold 20 .

[0156] In one embodiment, the seal fastening members 93 may each include a seal fastening bolt 95 .

[0157] In the following, reference will be made to the accompanying Figures 1 to 13 , an assembly process of the casting mold device 100 according to an embodiment of the present invention configured as described above and an operation of the casting mold device 100 are described in detail.

[0158] Fig.13 is a view showing the operation of a casting mold apparatus according to another embodiment of the present invention.

[0159] refer to Figures 1 to 12 , a plurality of core pin assemblies 30 are provided, each core pin assembly comprising a plug housing 31 , a plug pin 41 and a plug bushing 51 .

[0160] In a state in which the plug housing 31 , the plug pin 41 , and the plug bushing 51 of each core pin assembly 30 are separated from each other, the plug housing 31 , the plug pin 41 , and the plug bushing 51 are combined with each other.

[0161] The following describes a structure for combining the plug housing 31, the plug pin 41, and the plug bush 51. The plug pin 41 is assembled with the hollow portion 32 of the plug housing 31.

[0162] At this time, the plug pin 41 protrudes from the hollow portion 32 of the plug housing 31 , and the plug pin 41 is coupled to the housing inner flange 35 of the plug housing 31 through the pin outer flange 45 and the locking protrusion.

[0163] Next, the plug bushing 51 is assembled with the hollow portion 32 of the plug housing 31. The plug bushing 51 is disposed in the hollow portion 32 of the plug housing 31 and is located above the plug pin 41. In addition, the bushing outer flange 53 of the plug bushing 51 supports the upper surface of the housing outer flange 33 of the plug housing 31.

[0164] In this state, the bushing outer flange 53 and the housing outer flange 33 are fastened by a plurality of bolts 55. Then, the plug pin 41 may be fixed by the plug bushing 51 in a state where the plug pin 41 is coupled to the housing inner flange 35 through the pin outer flange 45 and the locking protrusion.

[0165] As described above, the cooling air flow path 57 is formed in the core pin assembly 30 in which the plug housing 31 , the plug pin 41 , and the plug bushing 51 are combined with each other.

[0166] Next, the core pin assembly 30 is assembled with the pin insertion hole 27 of the upper mold 20 in the up-down direction. In this case, the housing outer flange 33 of the plug housing 31 supports the upper surface of the upper mold 20. In addition, the plug pin 41 of the core pin assembly 30 protrudes downward from the pin insertion hole 27.

[0167] Meanwhile, in an embodiment of the present invention, a cooling unit 60 including a plurality of cover blocks 61 , a cooling pipe 71 , and a cooling air discharge module 81 is provided.

[0168] In one embodiment, the cooling unit 60 may be provided as a modular component in which a plurality of cover blocks 61, cooling pipes 71 and cooling air discharge modules 81 are connected to each other. In the cooling unit 60, the cooling air discharge module 81 includes a connection pipe 83, an exhaust housing 85 and an exhaust pipe 87.

[0169] The cooling pipe 71 is connected to the cooling air inlet portion 65 of the cover block 61. Furthermore, the cooling air inlet pipe 69 is connected to the cooling air inlet portion 65.

[0170] In addition, the connection pipe 83 of the cooling air discharge module 81 is connected to the cooling air outlet portion 67 of the cover block 61, and the exhaust housing 85 is connected to the connection pipe 83. The exhaust pipe 87 is connected to the exhaust housing 85.

[0171] In one embodiment of the present invention, a sealing unit 90 is provided, which includes a sealing plate 91 and a plurality of sealing fastening members 93. The plurality of sealing fastening members 93 may include sealing fastening bolts 95.

[0172] As described above, the sealing plate 91 is provided on the upper portion of the core pin assembly 30 in a state where the core pin assembly 30 is assembled with the pin insertion hole 27 of the upper mold 20 .

[0173] In this case, the lower surface of the sealing plate 91 supports the bushing outer flange 53 of the plug bushing 51 which is fastened to the housing outer flange 33 of the plug housing 31 by a plurality of bolts 55 .

[0174] The cooling pipe 71 of the cooling unit 60 passes through the hole formed in the sealing plate 91 and is assembled with the cooling air flow path 57 of each core pin assembly 30. In this case, the cooling pipe 71 is disposed in the flow path groove 42 of the plug pin 41 and the hollow portion 52 of the plug bushing 51 of each core pin assembly 30.

[0175] The upper surface of the sealing plate 91 supports the lower portion of the cover block 61. In this state, the path connecting portion 63 of each cover block 61 is connected to the cooling air flow path 57.

[0176] The cover block 61 and the sealing plate 91 are fastened by the sealing fastening bolts 95. In addition, the sealing plate 91 and the upper part of the upper mold 20 are fastened by the sealing fastening bolts 95.

[0177] The cooling unit 60 may be connected to the core pin assembly 30 and fixed to the upper mold 20. In addition, a portion between the core pin assembly 30 and the cooling unit 60 may be sealed by a sealing plate 91.

[0178] Since the cooling unit 60 is coupled to the core pin assembly 30 as described above, the cooling air discharge flow path 59 is formed in the cooling air flow path 57 of the core pin assembly 30 provided with the cooling pipe 71 .

[0179] The cooling air discharge flow path 59 is formed between the outer periphery of the cooling pipe 71, the inner periphery of the plug bushing 51 and the inner periphery of the plug pin 41. In addition, the cooling air discharge flow path 59 is connected to the cooling pipe 71, the path connection portion 63 and the cooling air outlet portion 67.

[0180] Below, reference Fig.13 The operation of the casting mold device 100 is described, in which the core pin assembly 30 is installed in the upper mold 20 as described above. First, the upper mold 20 is moved upward by the driving device so that the upper mold 20 is in a state of being separated from the lower mold 10.

[0181] In this state, when the upper mold 20 is moved downward by the driving device and attached to the lower mold 10 , a cavity 7 having a preset shape and volume is formed between the lower molding part 15 of the lower mold 10 and the upper molding part 25 of the upper mold 20 .

[0182] Next, the molten metal 5 contained in the holding furnace 17 is pushed upward along a preset route by low-pressure compressed air from below the lower mold 10 . Then, the molten metal 5 is injected into the cavity 7 through the molten metal injection portion 13 of the lower mold 10 .

[0183] Therefore, the casting mold device 100 according to the embodiment of the present invention can produce the cylinder head 1 having a preset shape by solidifying the molten metal 5 injected into the cavity 7 .

[0184] In this case, the core pin assembly 30 may form the spark plug mounting portion 3 in the cylinder head 1 in the form of a hole in a state where the core pin assembly 30 is disposed in the upper molding portion 25 of the upper mold 20 .

[0185] As described above, in the present embodiment, in the process of producing the cylinder head 1 , cooling air is supplied to the cooling air inlet pipe 69 , and is introduced into the cooling air inlet portion 65 of the head block 61 .

[0186] The cooling air is introduced into the cooling air flow path 57 of the core pin assembly 30 through the cooling pipe 71. In this case, the cooling air introduced into the cooling air flow path 57 flows along the cooling air discharge flow path 59 in the flow path groove 42 of the plug pin 41.

[0187] As described above, the cooling air flowing along the cooling air discharge flow path 59 passes through the path connection portion 63 of the cover block 61 , and is discharged through the cooling air outlet portion 67 .

[0188] In this case, since the portion between the core pin assembly 30 and the cooling unit 60 can be sealed by the sealing unit 90, the cooling air introduced into the cooling air flow path 57 can be discharged through the cooling air outlet portion 67 without leaking between the core pin assembly 30 and the cooling unit 60.

[0189] Therefore, the mold apparatus 100 according to the embodiment of the present invention can cool the core pin assembly 30 while causing cooling air to flow to the cooling air flow path 57 of the core pin assembly 30 .

[0190] Meanwhile, the cooling air discharged through the cooling air outlet portion 67 of the cover block 61 is captured in the exhaust housing 85 through the connection pipe 83. As described above, the cooling air captured in the exhaust housing 85 is discharged to the outside through the exhaust pipe 87.

[0191] In this case, the exhaust duct 87 discharges cooling air at one side edge of the upper bracket 21 farthest from the operator.

[0192] The casting mold apparatus 100 according to the embodiment of the present invention described above applies a separate cooling air discharge structure that discharges cooling air to the outside to the cooling unit 60 configured to cool the core pin assembly 30 by using cooling air.

[0193] In addition, the mold apparatus 100 according to the embodiment of the present invention adopts a sealing structure configured to seal cooling air that may leak between the core pin assembly 30 and the cooling unit 60 .

[0194] Therefore, the casting mold apparatus 100 according to the embodiment of the present invention can minimize the exhaust noise of the cooling air generated when the core pin assembly 30 is cooled by the cooling air.

[0195] Specifically, the casting mold device 100 according to the embodiment of the present invention may discharge cooling air through the cooling air discharge module 81 at one side edge of the upper support 21 farthest from the operator.

[0196] Therefore, the molding device 100 according to the embodiment of the present invention can improve the working environment of the operator while preventing the exhaust noise of the cooling air from causing hearing damage to the operator.

[0197] Furthermore, according to the mold apparatus 100 according to the embodiment of the present invention, the plug housing 31 , the plug pin 41 , and the plug bushing 51 of each core pin assembly 30 are configured to be separated from or combined with each other.

[0198] Therefore, according to the casting mold device 100 according to the embodiment of the present invention, when the core pin assembly 30 is damaged due to contact with the high-temperature molten metal 5 for a long time, only the damaged part thereof can be replaced, which reduces the cost required to replace the core pin assembly 30.

[0199] Although the embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications may be made and implemented within the scope of the claims, the detailed description of the present invention, and the drawings, and they also belong to the scope of the present invention.

Claims

1. A casting mold device for producing a cylinder head having a spark plug mounting portion, the casting mold device comprising: Lower mold; an upper mold configured to be attached to or detached from the lower mold; a plurality of core pin assemblies mounted in the upper die to form the spark plug mounting portion and having a cooling air flow path formed therein; a cooling unit mounted on the upper mold and including a cooling air inlet portion and a cooling air outlet portion respectively connected to a cooling air flow path of the core pin assembly; as well as A sealing unit is coupled to the cooling unit and the upper mold to seal a portion between the core pin assembly and the cooling unit.

2. The casting mold device according to claim 1, wherein: The cooling unit includes a cooling air discharge module connected to the cooling air outlet portion.

3. The casting mold device according to claim 1, wherein: The sealing unit comprises: a sealing plate disposed between the core pin assembly and the cooling unit; and A plurality of sealing fastening members are configured to fasten the cooling unit and the sealing plate, and to fasten the sealing plate and the upper mold.

4. A casting mold device, comprising: Lower mold; an upper mold configured to be attached to or detached from the lower mold; a plurality of core pin assemblies mounted in the upper mold and including a plurality of separation pins that can be configured to be coupled to or separated from each other, wherein the plurality of core pin assemblies include cooling air flow paths formed in the plurality of separation pins coupled to each other; a cooling unit mounted on the upper mold and connected to the cooling air flow path to inject and discharge cooling air; and A sealing unit is coupled to the cooling unit and the upper mold to seal a portion between the core pin assembly and the cooling unit.

5. The casting mold device according to claim 4, wherein: The core pin assemblies are respectively installed in pin insertion holes formed in the upper die in the up-down direction to form a spark plug mounting portion of the cylinder head.

6. The casting mold device according to claim 4, wherein: Each of the plurality of separation pins comprises: a cylindrical plug housing, which is fitted with a pin insertion hole formed in the upper mold in the up-down direction, and which is open at its upper and lower ends; a plug pin assembled with the cylindrical plug housing, coupled to the lower portion of the cylindrical plug housing, and having an open upper end and a closed lower end; and A plug bushing, which is assembled with the cylindrical plug housing to be arranged above the plug pin, is coupled to an upper portion of the cylindrical plug housing and has a cylindrical shape with upper and lower ends opened.

7. The casting mold device according to claim 6, wherein: The cylindrical plug housing includes: a housing outer flange formed on the outer periphery of the upper end thereof, and a housing inner flange formed on the inner periphery of the lower end thereof, and The plug bushing includes a bushing outer flange formed on an outer circumference of an upper end thereof.

8. The casting mold device according to claim 7, wherein: The housing outer flange and the bushing outer flange are fastened by a plurality of bolts.

9. The casting mold device according to claim 7, wherein: The housing inner flange is coupled to a pin outer flange formed at an upper end of the plug pin through a locking protrusion.

10. The casting mold device according to claim 4, wherein: The cooling unit comprises: a plurality of cover blocks, which are arranged at positions corresponding to the core pin assemblies and respectively have cooling air inlet portions and cooling air outlet portions; a cooling pipe connected to the cooling air inlet portions of the plurality of cover blocks and disposed in the cooling air flow path; and A cooling air discharge module is connected to the cooling air outlet portions of the plurality of cover blocks.

11. The casting mold device according to claim 10, wherein: The cooling unit includes cooling air inlet pipes each connected to one side of each cooling air inlet portion of the plurality of cover blocks, and The cooling pipes are each connected to the other side of each cooling air inlet portion by tapping.

12. The casting mold device according to claim 10, wherein: The cooling air discharge module comprises: a connecting pipe connected to the cooling air outlet portions of the plurality of cover blocks; an exhaust housing connected to the connecting pipe; and An exhaust pipe is connected to the exhaust housing.

13. The casting mold device according to claim 12, wherein: The exhaust pipe extends toward one side edge of an upper bracket coupled to the upper mold.

14. The casting mold device according to claim 6, wherein: The cooling air flow path includes a flow path groove formed in the plug pin, and a hollow portion of the plug bushing connected to the flow path groove.

15. The casting mold device according to claim 6, wherein: The cooling unit comprises: a plurality of cover blocks, each of which is disposed at a position corresponding to the core pin assembly and has a cooling air inlet portion and a cooling air outlet portion; and A cooling pipe is connected to the cooling air inlet portions of the plurality of cover blocks and is disposed in the plug bushing and the plug pin.

16. The casting mold device according to claim 15, wherein: The cooling air flow path comprises: a cooling air discharge flow path formed between the outer periphery of the cooling pipe, the inner periphery of the plug bushing and the inner periphery of the plug pin, Wherein, the cooling air discharge flow path is connected to the cooling pipe and the cooling air outlet portion.

17. The casting mold device according to claim 10, wherein: The sealing unit comprises: a sealing plate disposed between the core pin assembly and the plurality of cover blocks; and A plurality of sealing fastening members are configured to fasten the plurality of cover blocks and the sealing plate, and to fasten the sealing plate and the upper mold.

18. The casting mold device according to claim 17, wherein: The seal fastening members include seal fastening bolts, respectively.

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