KR20150049846A - Apparatus and method for manufaturing vehicle wheel - Google Patents

Abstract

The present invention relates to a vehicle wheel manufacturing device and a vehicle wheel manufacturing method and, more specifically, relates to a vehicle wheel manufacturing device and a vehicle wheel manufacturing method capable of manufacturing a vehicle wheel with excellent mechanical strength and a compact structure. The vehicle wheel manufacturing device comprises: a lower mold, an upper mold positioned on the upper side of the lower mold, and a cavity formed when the lower and upper molds are in contact wherein the vehicle wheel is formed. The molten vehicle wheel inside the cavity is gradually cooled in both directions toward a hub, and one end of the rim from the portion where a spoke and a rim are in contact.

Description

[0001] Apparatus and method for manufacturing an automobile wheel [

The present invention relates to an apparatus and a method for manufacturing an automobile wheel, and more particularly, to an apparatus and method for manufacturing an automobile wheel, which comprises a lower mold, an upper mold positioned on the upper side of the lower mold and a space formed when the lower mold and the upper mold are in contact, Wherein the molten automobile wheel in the cavity starts cooling from a portion where the spoke and the rim meet and is gradually cooled in both directions of the hub direction and the rim end direction, The present invention relates to an apparatus and a method for manufacturing an automobile wheel capable of manufacturing an automobile wheel having a dense structure and excellent mechanical strength by pressing the end of the rim.

The automobile wheel supports the vehicle with the tire located outside, and directly transmits the driving force and the braking force to the road surface. Generally, the automobile wheel is manufactured using the casting apparatus.

Referring to the following patent document, a casting apparatus for manufacturing an automobile wheel conventionally supplies a molten metal into a mold and cools it to manufacture an automobile wheel.

(Patent Literature)

Open Patent Publication No. 10-2012-0025921 (published on Mar. 16, 2012) "Low-pressure casting apparatus for automobile wheel manufacturing"

However, the conventional casting apparatus for manufacturing an automobile wheel has a problem that the strength of the automobile wheel (especially, the rim portion of the wheel) manufactured by adopting the low-pressure casting method is large due to the large structure.

Further, when a conventional automobile wheel is manufactured using a casting apparatus for manufacturing an automobile wheel, the cooling time of the molten metal is much consumed, resulting in a problem that the structure is not densified and durability is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

An object of the present invention is to provide an apparatus and a method for manufacturing an automobile wheel which can improve the product quality by making the structure of the automobile wheel manufactured by improving the cooling method and the pressing method during the manufacturing process to be dense and having excellent mechanical strength have.

The present invention also provides an apparatus and method for manufacturing an automobile wheel that can cool rapidly from a portion where a spoke and a rim meet to a stepwise cooling in the direction of a hub and a rim end respectively, thereby enabling rapid cooling and improving cooling efficiency It has its purpose.

Further, the present invention provides an apparatus and a method for manufacturing an automobile wheel in which a high pressure is applied to the end of the rim so that the automobile wheel having a compact structure and excellent mechanical strength can be manufactured, because the rim pressing portion presses the end of the rim. .

Further, according to the present invention, when the rim pressing portion is pressed against the end of the rim, the guide protrusion is inserted into the protrusion insertion groove to prevent the side core from being detached, and the end of the shaft of the fixing cylinder is inserted into the insertion groove of the fixing post, And to provide a manufacturing apparatus and a method for manufacturing an automobile wheel that can prevent the occurrence of a problem.

It is another object of the present invention to provide an apparatus and method for manufacturing an automobile wheel in which a rim pressing portion is lowered when a manufactured automobile wheel is removed to push out a rim end to easily separate the automobile wheel from the apparatus.

It is another object of the present invention to provide an apparatus and a method for manufacturing an automobile wheel in which the pressing member presses the rim of the rim pressing portion in the vicinity of the hub of the wheel in both directions of the wheel to improve the pressing efficiency.

In order to achieve the above object, the present invention is implemented by the following embodiments.

According to an embodiment of the present invention, an apparatus for manufacturing an automotive wheel according to the present invention includes: a lower mold; An upper mold positioned above the lower mold; And a cavity formed by the lower mold and the upper mold, the cavity being a space in which the automobile wheel is molded, wherein a molten automobile wheel in the cavity starts cooling from a portion where the spoke and the rim meet, And the cooling is progressively progressed in both directions.

According to another embodiment of the present invention, in the apparatus for manufacturing an automotive wheel according to the present invention, the upper mold includes a rim pressing portion for raising and lowering, and the rim pressing portion presses the end of the molten rim in the cavity .

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the lower mold includes a lower core forming an outer surface of a disk of the automobile wheel, A plurality of coolant supply grooves formed horizontally at a predetermined interval, and a plurality of coolant supply grooves formed in the coolant supply grooves, the coolant supply grooves being formed in the coolant supply grooves, And the refrigerant is supplied in the order from the refrigerant supply groove located at the outermost position to the refrigerant supply groove located at the center at the time of cooling the automobile wheel in the molten state.

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the upper mold includes an upper core forming an inner surface of a disc and a rim of an automobile wheel, And a coolant injection part for injecting coolant into the coolant groove, wherein a plurality of coolant grooves are formed at regular intervals and the coolant injection part is located in each of the coolant grooves, The refrigerant is supplied from the refrigerant groove located at the lowest position to the refrigerant groove located at the uppermost position.

According to another embodiment of the present invention, in the apparatus for manufacturing an automotive wheel according to the present invention, the upper core further includes a heater positioned above the refrigerant groove located at the uppermost position, The heating amount gradually decreases in the cooling process, and the operation is stopped when the rim end of the automobile wheel is cooled.

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the upper core further includes a hollow formed in the vicinity of the center, and the upper mold is inserted into the hollow, Wherein the center core presses the hub portion of the molten car wheel in the cavity.

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the lower mold includes a side core forming the outer surface of the rim of the automobile wheel, and the side core is embedded A plurality of refrigerant moving grooves are formed at regular intervals and a plurality of refrigerant moving grooves are formed at predetermined intervals so that refrigerant is supplied from the refrigerant moving grooves located at the lowest position when the automobile wheel is cooled in the molten state, And the refrigerant is finally supplied to the refrigerant moving groove located at the upper portion.

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the upper mold includes an upper core forming an inner surface of a disk and a rim of an automobile wheel, Wherein the lower mold includes a side core positioned at an outer surface of the upper core at a predetermined distance to form an outer surface of the rim of the automotive wheel, the rim pressing portion being embedded upward from the lower surface Wherein the side core includes a guide protrusion protruding from the top surface and inserted into the protrusion insertion groove so that when the end of the rim is pressed down by the downward movement of the rim pressing portion, So that it is possible to prevent the side core from being pushed outwardly.

According to another embodiment of the present invention, in the apparatus for manufacturing an automobile wheel according to the present invention, the apparatus for manufacturing an automobile wheel includes a moving plate coupled to an upper end of the upper core to move up and down, Wherein a fixed cylinder is provided on the upper side of the movable frame and an insertion groove into which the shaft of the fixed cylinder is inserted is formed on one side of the fixed post, When the axis of the fixed cylinder is inserted into the insertion groove, the upward movement of the moving plate is restricted. Therefore, even if the rim pressing portion is lowered to press the distal end of the rim, And the like.

According to another embodiment of the present invention, in the apparatus for manufacturing an automotive wheel according to another embodiment of the present invention, the upper mold forms an inner surface of a disk and a rim of an automobile wheel and includes an upper core having a hollow, ; A pressing member which is inserted and inserted into the cavity after the molten metal is supplied through the hollow of the upper core to press the molten metal in the cavity; Wherein the lower core includes a side core disposed at an outer side of the upper core to form an outer surface of the rim of the automobile wheel, Wherein the rim pressing portion includes a projection insertion groove formed upwardly from a lower surface thereof and the side core includes a guide protrusion protruding from an upper surface and inserted into the projection insertion groove so that the rim pressing portion is lowered, The guide protrusion is inserted into the protrusion insertion groove, thereby preventing the side core from being pushed outward.

According to another embodiment of the present invention, there is provided a method for manufacturing an automotive wheel, comprising the steps of injecting molten metal into an automobile wheel-shaped cavity formed by locating an upper mold and a lower mold at predetermined intervals, And a cooling and pressurizing step of pressurizing and cooling the molten metal injected into the cavity, wherein the cooling and pressurizing step starts cooling from a portion where the spokes and the rim of the molten automobile wheel meet to both the hub direction and the rim end direction And a cooling step for progressing the cooling stepwise at the same time.

According to another embodiment of the present invention, in the method of manufacturing an automobile wheel according to the present invention, the cooling and pressing step includes a pressing step of pressing the end of the rim of the molten automobile wheel at the same time, And a control unit.

According to another embodiment of the present invention, there is provided a method of manufacturing an automobile wheel, comprising: a separating step of separating an automobile wheel inserted into the upper mold from the lower mold by raising the upper mold; And a removing step of lowering the rim pressing portion connected to the mold so as to push out the end of the rim to remove the automobile wheel from the upper mold.

1 is a schematic perspective view of an apparatus for manufacturing an automobile wheel according to an embodiment of the present invention;
2 is a schematic cross-sectional view of an apparatus for manufacturing an automobile wheel according to an embodiment of the present invention;
3 is an enlarged view of '?' In FIG. 2;
Figure 4 is a partially cut away perspective view of the lower core of Figure 2;
Figure 5 is a partially cut away perspective view of the upper core of Figure 2;
Figure 6 is a partially cut away perspective view of the center core of Figure 2;
Figure 7 is a partially cut away perspective view of the rim pressing portion of Figure 2;
Figure 8 is a partially cut away perspective view of the cooling ring of Figure 2;
9 is a schematic perspective view of an apparatus for manufacturing an automobile wheel according to another embodiment of the present invention.
10 is a schematic sectional view of an apparatus for manufacturing an automobile wheel according to another embodiment of the present invention.
11 is an enlarged view of '?' In FIG.
FIG. 12 is a partially cutaway perspective view of the lower core of FIG. 10; FIG.
Figure 13 is a partially cut away perspective view of the upper core of Figure 10;
14 is a perspective view of an automobile wheel manufactured by an automobile wheel manufacturing apparatus according to the present invention.
15 to 19 are views for explaining a process of manufacturing an automobile wheel using an automobile wheel manufacturing apparatus according to an embodiment of the present invention.

Hereinafter, an apparatus and method for manufacturing an automobile wheel according to the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Further, the detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

2 is a schematic cross-sectional view of an apparatus for manufacturing an automobile wheel according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the apparatus shown in FIG. Fig. 4 is a partially cutaway perspective view of the lower core of Fig. 2, Fig. 5 is a partially cutaway perspective view of the upper core of Fig. 2, Fig. 6 is a partially cut- Fig. 8 is a partially cutaway perspective view of the cooling ring of Fig. 2, Fig. 9 is a schematic perspective view of an apparatus for manufacturing an automobile wheel according to another embodiment of the present invention, and Fig. 10 is a cross- 11 is an enlarged view of '?' Of FIG. 10, FIG. 12 is a partially cutaway perspective view of the lower core of FIG. 10, and FIG. 13 is a cross- 10 is a partial cutaway perspective view of the upper core, 15 to 19 are views for explaining a process of manufacturing an automobile wheel using an automobile wheel manufacturing apparatus according to an embodiment of the present invention.

1 to 8 and 14, the apparatus for manufacturing an automobile wheel includes a melt supply part 1, a support frame 2, a lower mold 3, An upper mold 4, a side cooling section 5, a controller (not shown), and the like. A hollow space (hereinafter, referred to as 'cavity A') corresponding to the shape of an automobile wheel to be manufactured is formed in the manufacturing apparatus of the automobile wheel. A molten metal is injected into the cavity A An automobile wheel having a shape corresponding to the shape of the cavity A is manufactured. Referring to FIG. 14, the structure of the automobile wheel 100 according to the description of the manufacturing apparatus will be described. The automobile wheel 100 includes a disk 110 having a front part design, And a rim 120 for mounting and retaining the disc 110. The disc 110 includes a hub 130 formed to penetrate the center of the disc and coupled to the axle and a stalk 130 radially connecting the hub 130 and the rim 120. [ (140).

The molten metal supply unit 1 is configured to supply molten metal to the cavity A and includes a supply tank 11, a stock 12, and the like.

The supply tank 11 is configured to store the molten metal and the molten metal stored in the supply tank 11 is supplied to the cavity A through a stalk 12 to be described later. Inside the supply tank 11, there are provided first and second sensors 111 and 112 for measuring the level of the molten metal, an inlet 113 formed through one side of the first side and for introducing pressurized air, A discharge port 114 for discharging pressurized air, a thermometer 115 for measuring the temperature of the molten metal, and a heater 116 for heating the molten metal. The first sensor 111 is positioned above the second sensor 112 and the inlet 113 and the outlet 114 are located at a position higher than the maximum level h1 of the molten metal supplied into the supply tank 11 Is formed at a high point.

The one end of the stoke 12 is connected to the supply tank 11 and the other end is connected to the cavity A to supply the molten metal in the supply tank 11 to the cavity A, And preferably has a cylindrical shape with its top and bottom opened.

When the molten metal B is supplied to the cavity A through the molten metal supply unit 1, pressurized air is supplied to the supply tank 11 through a pressurizing unit (not shown) connected to the inlet 113 The inside of the supply tank 1 is pressurized so that the molten metal inside the supply tank 1 rises through the stoke 12 and is supplied to the cavity A. [

The support frame 2 is connected to the upper side of the supply tank 11 to support a lower mold 3, an upper mold 4 and a side cooling portion 5 to be described later. The lower frame 21, An upper frame 22, a fixing post 23, a moving frame 24, and the like.

The lower frame 21 is installed on the upper surface of the supply tank 11 at a predetermined interval to support the lower mold 3.

The upper frame 22 supports a lifting cylinder 221 positioned at an upper side of the lower frame 21 to provide a driving force for moving up and down the moving frame 24, 22 and the lower frame 21 are connected by a fixing post 23.

The moving frame 24 includes receiving grooves 241 through which the fixing posts 23 are inserted so that the moving frame 24 is moved up and down by the operation of the ascending and descending cylinder 221 . A fixing cylinder 242 is horizontally disposed on the upper side of the moving frame 24 and an insertion groove 231 through which the shaft of the fixed cylinder 242 is inserted is formed on one side of the fixing post 23, The movement of the movable frame 24 is restricted when the fixed cylinder 242 is relaxed and the axis of the fixed cylinder 242 is inserted into the insertion groove 231. [

The lower mold 3 is supported by the lower frame 21 and is formed with the upper mold 4 to form a cavity A. The lower mold 3 includes a base 31, a lower core 32, 33, a side core 34, a side driver 35, and the like.

The base 31 is installed on the upper surface of the lower frame 21 to support the lower core 32 and the side cores 34. The base 31 supports the lower core 32, And a refrigerant discharge path 311 communicating with the groove 321 to discharge the refrigerant discharged from the refrigerant supply groove 321 to the outside of the apparatus.

The lower core 32 is disposed on the upper side of the base 31 to form an outer surface of the disk 110 of the automobile wheel 100. The lower core 32 includes a coolant supply groove 321, A thermometer 323, and the like.

The coolant supply holes 321 are formed in the lower surface of the lower core 32 at predetermined intervals along the outer circumferential surface of the coolant supply groove 321, The thermometer 323 is located and the lower end of the thermometer 323 is communicated with the refrigerant discharge path 311. 4, a plurality of coolant supply grooves 321 are formed horizontally at regular intervals, and a coolant spraying portion 322 and a thermometer 323 are respectively disposed in the respective coolant supply grooves 321 .

The coolant spraying portion 322 is located in the coolant supply groove 321 and injects the coolant toward the upper end of the coolant supply groove 321. The coolant is injected into the cavity A The heated refrigerant is discharged to the outside through the lower end of the refrigerant supply groove 321 and the refrigerant discharge path 311. [ The refrigerant supplied from the refrigerant spraying unit 322 may be air. A plurality of coolant supply grooves 321 are formed in the lower core 321 and the supply of coolant to the coolant supply grooves 321 is performed for each of the coolant supply grooves 321. Hereinafter, do.

The molten metal inlet port 33 is formed to vertically penetrate the base 31 and the lower core 32 to communicate the stoke 12 and the cavity A. The molten metal supplied from the stoke 12 flows through the molten metal And is supplied to the cavity A through the insertion port 33.

The side core 34 is positioned on the upper side of the base 31 and is configured to form an outer surface of the rim 120 of the automobile wheel 100 and is horizontally moved by the side driving unit 35. The side core 34 includes a guide protrusion 341 protruding from the upper surface and inserted into the protrusion insertion groove 431 of the rim pressing portion 43 to be described later and a guide protrusion 341 formed to be embedded along the outer circumferential surface of the side core 34 And includes a refrigerant moving groove 342. A plurality of the refrigerant moving grooves 342 are vertically formed at regular intervals. The side cores 34 are divided into a predetermined shape and a predetermined number. Preferably, the side cores 34 are vertically opened as shown in FIG. 1, and the outer side has a cylindrical shape inclined downward toward the lower side. The side drive unit 35 is installed in the lower frame 21 and horizontally moves the side core 41. For example, a hydraulic cylinder may be used.

The upper mold 4 is connected to the moving plate 24 and is formed with the lower mold 2 to form a cavity A. The upper mold 4 includes the upper core 41, the center core 42, (43), an upper mold driving part (44), and the like.

The upper core 41 is engaged with the lower surface of the moving plate 24 and moves up and down according to the ascending and descending movement of the moving plate 24 and is located on the upper side of the lower core 32, A coolant groove 412, a coolant jetting section 413, a thermometer 414, a heater 415, and the like, which are configured to form an inner circumferential surface of the rim 120 and the inner circumferential surface of the rim 120,

The hollow core 411 is inserted through the center of the upper core 41 and the center core 42 is inserted into the hollow core 411.

The coolant groove 412 is formed along the inner circumferential surface of the upper core 41 and the coolant injection portion 413 and the thermometer 414 are located in the coolant groove 412. As shown in FIG. 5, the refrigerant grooves 412 are vertically spaced apart from each other at a predetermined interval. A coolant spraying section 413 and a thermometer 414 are disposed in the respective coolant grooves 412, A heater 415 is disposed on the upper side of the refrigerant groove 412 located in the refrigerant pipe 412.

A plurality of coolant grooves 412 are formed in the upper core 41 and the supply of the coolant to the coolant grooves 412 is formed in the coolant grooves 412. [ And the refrigerant grooves 413, which will be described later in detail.

The center core 42 is inserted into the hollow 411 of the upper core 41 and is used to form a central portion of the disk 110 of the automobile wheel 100, And may be connected to the center core driving unit 441 and ascend and descend. As shown in FIG. 6, the center core 42 includes an embedded refrigerant groove 421 formed at an outer circumferential surface of the center core 42 at a predetermined interval and being embedded downward from the upper surface along the outer circumferential surface, A refrigerant discharge portion 423 for supplying a refrigerant to the lower ends of the refrigerant suction groove 421 and the central refrigerant groove 422, And a thermometer 424 connected to the center core 42 and measuring the temperature.

The rim pressing portion 43 is configured to form the end surface of the rim 120 of the automobile wheel 100 by being positioned on the outer side of the upper core 41 and the upper side of the side core 34, And can be lifted and lowered by the driving unit 442. As shown in FIG. 7, the rim pressing portion 43 includes a protrusion insertion groove 431 which is formed upwardly from a lower surface of the rim pressing portion 43 and into which the guide protrusion 341 is inserted. The rim pressing portion 43 is lowered by the pressure driving portion 442 when manufacturing the automobile wheel 100 to press the end of the rim 120 in the molten state to make the structure of the automobile wheel 100 tight, In the post-manufacturing process of the automobile wheel 100, the pressure is reduced by the pressure driver 442 to press the distal end of the cooled rim 120 to separate the automobile wheel 100 from the upper mold 4. When the rim pressing portion 43 presses the end of the rim 120 in the manufacturing process of the automobile wheel in the cavity A, the guide protrusion 341 is inserted into the protrusion insertion groove 431, And the shaft of the fixed cylinder 242 is inserted into the insertion groove 231 of the fixing post 23 to prevent the moving plate 24, that is, the upper side of the upper core 41 It is possible to keep the cavity A suitable for the automobile wheel 100 to be manufactured.

The upper mold driving part 44 includes a center core driving part 441 connected to the moving plate 24 to raise and lower the center core 42 and a pressing driving part 442 for moving up and down the rim pressing part 43 ).

The side cooling portion 5 is located outside the side core 34 and supplies the refrigerant to the refrigerant moving groove 342. The side cooling portion 5 includes a cooling ring 51 and a cooling ring driving portion 52. [

The cooling ring 51 is located on the outer surface of the side core 34 and supplies the refrigerant to the refrigerant moving groove 342. The cooling ring 51 can be lifted and lowered by the cooling ring driving part 52. The cooling ring 51 includes a coolant inlet groove 511 and a coolant outlet groove 512 formed to penetrate and communicate with the coolant moving groove 342. As shown in FIG. 8, the refrigerant inlet grooves 511 and the refrigerant outlet grooves 512 are vertically formed at a predetermined interval. The refrigerant supplied through the refrigerant supply device (not shown) connected to the refrigerant inflow groove 511 is supplied to the refrigerant moving groove 342 through the refrigerant inflow groove 511, And the superheated refrigerant to be cooled is discharged to the outside through the refrigerant discharge groove 512.

The controller (not shown) controls the overall operation of the manufacturing apparatus of the automobile wheel.

9 to 14, the apparatus for manufacturing an automobile wheel includes a support frame 2 ', a lower mold 3', an upper mold 4 ' A side cooling section 5 ', a controller (not shown), and the like. Hereinafter, only differences from the apparatus for manufacturing an automobile wheel as described with reference to Figs. 1 to 8 and 14 will be described.

The support frame 2 'is different from the support frame 2' in that the lower frame 21 'is not located on the upper surface of the supply tank 11 but forms the lower surface of the manufacturing apparatus of the car wheel. It is the same as the support frame 2.

The lower mold 3 'is supported by the lower frame 21' and is opened with the upper mold 4 'to form a cavity A. The base 31', the lower core 32 ' A side core 34 ', a side driver 35', and the like. The lower core 32 'is formed with a central coolant groove 324' which is formed upwardly from the lower side in place of the molten metal inlet 33 formed through the upper and lower portions and the coolant injection portion 322 ' In the remaining construction, the lower mold 3 'is the same as the lower mold 3.

The upper mold 4 'is connected to the moving plate 24' and is formed with the lower mold 2 'to form the cavity A. The upper mold 41', the pressing member 42 ' , A rim pressing portion 43 ', an upper mold driving portion 44', and the like. There is a difference in that the molten metal is supplied through the hollow 411 'of the upper core 41' and the pressing member 42 'is formed instead of the center core 42. In the remaining structure, The mold 4 'is the same as the upper mold 4.

The pressing member 42 'is moved up and down by the pressing member driving unit 441' and is inserted into the hollow 411 'after the molten metal is supplied through the hollow 411' of the upper core 41 ' And presses the molten metal in the cavity (A).

Hereinafter, a method for manufacturing an automobile wheel using an apparatus for manufacturing an automobile wheel according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8 and 14 to 19, (B) into a cavity (A) having a shape corresponding to the shape of the cavity (A); a cooling and pressing step of cooling and pressing the molten metal (B) injected into the cavity (A) A separating step of separating the automobile wheel 100, which is cooled and pressed in the cooling and pressing step, from the lower mold 3, and a separating step of separating the automobile wheel 100 manufactured after the separating step from the upper mold 4 And a removing step of separating the liquid.

The injecting step is a step of injecting the molten metal B into the cavity A. When the pressurized air is supplied through the inlet 113, the molten metal B in the supply tank 11 Is supplied to the cavity (A) through the stoke (12).

The cooling and pressing step includes cooling the molten metal (molten automobile wheel 100) in the cavity A after the injection step to manufacture the automobile wheel 100, and includes a pressing step and a cooling step.

The pressing step is a step of pressing the end of the rim 120 of the molten automobile wheel 100 and pressing the vicinity of the hub 130 after the injecting step. The rim pressing portion 43 is lowered to press the distal end 130 of the rim and the center core 42 is lowered to press the vicinity of the hub 130 as shown in Fig.

The cooling step may include a step of pressing the molten car wheel 100 in the molten state by the pressing step so that a portion of the molten car wheel 100 where the rim 120 meets the rim 120 ) To start cooling stepwise simultaneously in both the direction of the hub 130 and the direction of the end of the rim 120. The refrigerant is supplied from the refrigerant supply groove 321a, the refrigerant moving groove 342a and the refrigerant groove 412a closest to the corner portion C as shown in Fig. 17, The refrigerant is supplied to the refrigerant supply grooves 321e, the refrigerant moving grooves 342c, and the refrigerant grooves 412g which are far away from each other. The heater 415 is positioned above the refrigerant groove 412g located at the uppermost position so that the end of the rim 120 is cooled most later in the cooling direction from the edge portion C to the end direction of the rim 120 During the cooling of the edge portion C, the heating operation is gradually reduced while operating, and the cooling operation is stopped when the end of the rim 120 is cooled. The coolant is supplied to the impregnated coolant groove 421 at the end of the cooling in the direction from the corner portion C toward the hub 130 to cool the vicinity of the hub 13. The stepwise supply of the coolant for cooling stepwise in the direction of the ends of the hub 130 and the rim 130 in the corner portion C is controlled by the controller according to the values measured by the thermometers 323 and 414. The apparatus for manufacturing an automobile wheel can pressurize simultaneously both sides of the hub and both ends of the rim end to perform rapid cooling so that the manufactured automobile wheel is characterized by a compact structure and excellent mechanical strength. After the automobile wheel 100 is completely cooled in the cooling and pressurizing step, the air in the supply tank 11 is discharged to the outside through the discharge port 114 and the molten metal located in the molten metal inlet 33 is supplied to the supply tank 11 so that the automobile wheel 100 is manufactured.

The separation step is a step of separating the automobile wheel 100 manufactured in the cooling and pressing step from the lower mold 3 and raising the cooling ring 51 so that the cooling ring 51 is moved from the side core 34 When the lifting cylinder 221 is operated to lift the moving plate 24 after moving the side core 34 outward by operating the side driving unit 35, The automobile wheel 100 is moved upward together with the upper mold 4 as shown in FIG.

The removal step is a step of removing the automobile wheel 100 to the upper mold 4 after the separation step. As shown in FIG. 19, the rim pressing part 43 is lowered to remove the car wheel 100, The automobile wheel 100 is separated from the upper mold 4 when the end of the rim 120 of the automobile wheel 100 is pushed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

1: molten metal supply part 2, 2 ': support frame 3, 3': lower mold 4, 4 '
5, 5 ': side cooling portion 11: supply tank 12: stoke 21, 21': lower frame
22, 22 ': upper frame 23, 23': fixing post 24, 24 '
31, 31 ': base 32, 32': lower core 34, 34 ': side core
35, 35 ': Side driver 41, 41': Upper core 42: Center core
43, 43 ': rim pressing portion 44, 44': upper mold driving portion 51, 51 ': cooling ring
52, 52 ': Cooling ring groove

Claims (13)

A lower mold; An upper mold positioned above the lower mold; And a cavity formed by the lower mold and the upper mold, wherein the cavity is a space in which the car wheel is molded,
Wherein the molten automobile wheel in the cavity starts cooling from a portion where the spoke and the rim meet, and cooling progresses stepwise in both the hub direction and the rim end direction. The method according to claim 1,
Wherein the upper mold includes a rim pressing portion that moves up and down, and the rim pressing portion presses the end of the molten rim in the cavity. The method according to claim 1,
Wherein the lower mold includes a lower core forming an outer surface of a disk of the automobile wheel,
Wherein the lower core includes a coolant supply groove formed at a predetermined distance from an outer circumferential surface of the lower core along an outer circumferential surface thereof so as to be upwardly inserted into the coolant supply groove,
A plurality of coolant supply grooves are formed horizontally and spaced apart from each other at a predetermined interval, and a coolant injection portion is disposed in each of the coolant supply grooves, and the coolant supply portion is located at a center from a coolant supply groove located at the outermost position And the refrigerant is supplied in the order of the refrigerant supply grooves. The method according to claim 1,
Wherein the upper mold comprises an upper core forming an inner surface of a disk and rim of an automobile wheel,
Wherein the upper core includes a refrigerant groove formed to be embedded along the inner circumferential surface thereof and a coolant injection portion for injecting the coolant into the coolant groove,
The plurality of refrigerant grooves are vertically spaced apart from each other at a predetermined interval. The refrigerant jetting portion is located in each of the refrigerant grooves. The refrigerant jetting portion is located at the lowest position of the refrigerant groove, Wherein the refrigerant is supplied in the order of: 5. The method of claim 4,
The upper core further includes a heater positioned above the refrigerant groove located at the uppermost position,
Wherein the heater gradually decreases the amount of heating in the cooling process of the automobile wheel to stop the operation when the rim end of the automobile wheel cools. 5. The method of claim 4,
The upper core further comprising a hollow formed through the center,
Wherein the upper mold further includes a center core inserted into the hollow and moving up and down, and the center core presses the hub portion of the molten automobile wheel in the cavity. The method according to claim 1,
Wherein the lower mold comprises a side core forming the outer surface of the rim of the automotive wheel,
Wherein the side core includes a refrigerant moving groove through which a refrigerant embedded in the outer circumferential surface is supplied,
The plurality of refrigerant moving grooves are formed at a plurality of vertically spaced intervals so that refrigerant is supplied from a refrigerant moving groove located at the lowest position when cooling the molten automobile wheel, Is supplied to the wheel (3). The method according to claim 1,
Wherein the upper mold includes an upper core forming an inner surface of a disk and a rim of an automobile wheel and a rim pressing portion raising and lowering along an outer surface of the upper core,
Wherein the lower mold comprises a side core positioned at an outer surface of the upper core at a predetermined interval to form an outer surface of the rim of the automobile wheel,
Wherein the rim pressing portion includes a projection insertion groove formed upwardly from a lower surface thereof and the side core includes a guide protrusion protruding from an upper surface and inserted into the projection insertion groove so that the rim pressing portion is lowered, The guide protrusion is inserted into the protrusion insertion groove, thereby preventing the side core from being pushed outwardly. 9. The method of claim 8,
The apparatus for manufacturing an automobile wheel may further include a moving plate coupled to an upper end of the upper core to move up and down, and a fixing post inserted in the moving plate to guide up and down movement of the moving plate,
An insertion groove into which the shaft of the fixed cylinder is inserted is formed on one side of the fixed post, and the shaft of the fixed cylinder is inserted into the insertion groove by relaxing the fixed cylinder. Wherein the movement of the moving plate is restricted so that the rim pressing portion is lowered to prevent the upper core from being pushed upward even when the end of the rim is pressed. The method according to claim 1,
The upper mold forms an inner surface of a disk and a rim of an automobile wheel, and includes an upper core having a hollow formed vertically through the center thereof; A pressing member which is inserted and inserted into the cavity after the molten metal is supplied through the hollow of the upper core to press the molten metal in the cavity; And a rim pressing portion that moves up and down along the outer surface of the upper core,
Wherein the lower mold comprises a side core positioned at an outer surface of the upper core at a predetermined interval to form an outer surface of the rim of the automobile wheel,
Wherein the rim pressing portion includes a projection insertion groove formed upwardly from a lower surface thereof and the side core includes a guide protrusion protruding from an upper surface and inserted into the projection insertion groove so that the rim pressing portion is lowered, The guide protrusion is inserted into the protrusion insertion groove, thereby preventing the side core from being pushed outwardly. An injecting step of injecting molten metal into a cavity of an automobile wheel formed by locating the upper mold and the lower mold at a predetermined interval; and a cooling and pressurizing step of pressurizing and cooling the molten metal injected into the cavity in the injecting step,
Wherein the cooling and pressurizing step includes a cooling step of simultaneously cooling stepwise in both the hub direction and the rim end direction by starting cooling from a portion where the spoke and the rim of the molten automobile wheel meet each other. ≪ / RTI > 12. The method of claim 11, wherein the cooling pressurization step
Further comprising a pressing step of pressing the end of the rim of the molten automobile wheel simultaneously, or before and after the cooling step. 13. The method of manufacturing a motor vehicle according to claim 12,
A separating step of separating an automobile wheel sandwiched by the upper metal mold from the lower metal mold by raising the upper metal mold and a rim pressing part connected to the upper metal mold after the separating step is lowered to push the end of the rim, Wherein the removing step further comprises a removing step of removing the carbon black.

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