JPH03124343A - Die apparatus for wheel of vehicle - Google Patents

Abstract

PURPOSE:To prevent the development of casting defect and to improve strength in a disk part by setting cooling means at one side and a feeder head at the other side of cavity for forming the disk and setting a gate connecting with cavity for forming a rim. CONSTITUTION:Principal parts of the cavity 10 for forming the disk, cavity 14 for forming design and cavity 15 for forming the rim are constituted with a lower die composed of a disk surface side forming die 1 and design surface side forming die 3, an upper die composed of a disk back side forming die 2 and design back side forming die 4 and a side die composed of a rim forming die 5. In the above die apparatus of wheel for vehicle, the cooling means composed of cooling holes 12-13 causing cooling water to flow in the lower die is arranged at lower part of the above cavity 10 for forming the disk. Further, the feeder head part 11 is formed at upper part thereof. Further, the gate 16 is set as connecting with the above cavity 15 for forming the rim. At the time of pouring the molten metal into this die, the molten metal A is pushed up with a low pressure casting device through a molten metal supplying tube 20 and supplied into the cavity 15 for forming the rim through a runner 17, gate 16, etc. By this method, sufficient cooling and supplement of the molten metal to the disk part can be obtd. and casing having high quality is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molding device for a vehicle wheel.

[Prior art]

Conventionally, in a vehicle wheel molding device in which molten metal is supplied by a low-pressure casting device, for example, a cooling means is installed below the disk molding space, and a runner and a weir are formed inside the cooling device. A low-pressure casting device was known in which the metal was poured into the casting space through the weir (Utility Model Opening in 1986-1).
No. 6540).

[Problem that the invention sought to solve]

However, in such a molding device, a weir was formed inside the cooling device, making it difficult to maintain the injected molten metal at a constant temperature, resulting in the inconvenience that casting defects were likely to occur. had. In addition, although the disc part of a vehicle wheel is required to be strong, in conventional molding equipment, a weir is installed in the disc part, making it difficult to cool the disc part sufficiently. As a result, it has been difficult to improve the strength of the disk portion.

[Means to solve the problem]

In order to solve the above problems, in the vehicle wheel molding device of the present invention, the main portion is constituted by a disc molding space, a design molding space, and a rim molding space. A cooling means is disposed in one of the molding spaces, a feeder is disposed in the other, and a weir is connected and disposed in the rim molding space.

[Action of the invention]

In the vehicle wheel molding device configured as described above, a cooling means is disposed in one of the disc molding spaces and a riser is disposed in the other, and a weir is connected and disposed in the rim molding space. Therefore, by passing the molten metal in a place away from the cooling means in the disc molding space, a large space can be taken up near the disc molding space, which not only makes it possible to sufficiently cool the disc part, but also Sufficient molten metal can be replenished from the riser, and as a result, the structure of the disc portion of the vehicle wheel to be cast can be made finer, the generation of shrinkage cavities can be prevented, and the strength can be improved.

[Explanation of Examples]

Hereinafter, the first embodiment of the present invention will be described with respect to a low-pressure casting apparatus.
．． This will be explained based on FIG.

The mold body for molding vehicle wheels consists of a disk front side mold (lower mold) ■, a disk back side mold (upper mold) 2
．． And on their outer periphery, design front mold (lower mold)
3. The design is formed by combining a back side mold (upper mold) 4 and a rim outer peripheral mold (horizontal type) 5.5.

Next, a lower mold insert 6 is placed upright in the center of the disk front side mold (lower mold) 1, and a disk back side mold (upper mold) is placed so as to surround the outer periphery of the lower mold insert 6. 2
A cylindrical cavity 7 is formed at approximately the center of the cavity 7, and an expansion step 8 is formed at approximately the middle of the cavity 7, and a plurality of ring-shaped inserts are formed in the expansion step 8. 9 are arranged in a stacked manner to form a riser space 11 at the center of the back side of the disc molding space 10 formed by the disc front side mold (lower mold) l and the disc back side mold (upper mold) 2. .

In addition, main cooling holes 12 and auxiliary cooling holes 13 are formed inside the disk front side mold (lower mold) ■ and the design front side mold (lower mold) 3, respectively, and these cooling holes 12.1
By circulating a cooling medium, for example, cooling water, through the disk front mold 1 and the design front mold 3, the disk front mold 1 and the design front mold 3 are cooled. Note that the main cooling holes 12 and the auxiliary cooling holes 13 correspond to cooling means of the present invention.

Further, a design front side mold (lower mold) 3 and a design back side mold (upper mold) 4 arranged adjacent to the outer periphery of the disk front side mold (lower mold) 1 and the disk back side mold (upper mold) 2 are used to create a design. A molding space 14 is formed, and on the outer periphery of the design molding space 14, the design front side mold (lower mold) 3. Design backside mold (
A rim molding space 15 is formed by the upper mold) 4 and the rim outer periphery mold (horizontal type) 5, and a dam 16 is formed in the rim outer periphery mold (horizontal type) 5 on the inner wall of the rim molding space 15.
is formed, and a runner 17 is connected to the outside of the weir 16. Furthermore, a sealed molten metal holding furnace 18 is disposed below the mold body, and the molten metal A is accommodated in the molten metal holding furnace 18, and an air hole for feeding compressed air is provided in the upper part of the molten metal holding furnace 18. 19 are provided. Further, a hot water supply pipe 20 is connected to the lower part of the runner 17.

Therefore, if compressed air flows into the molten metal holding furnace 18 from the air hole 19 and pressurizes the molten metal surface A, the molten metal A will be
The hot water is pushed up through each hot water supply pipe 20, passes through each runner 17 and its weir 16, and is forcibly supplied from the rim forming space 14 to the entire casting space, where a vehicle wheel is cast. .

〔Effect of the invention〕

In the vehicle wheel molding device of the present invention, a cooling means is disposed in one side of the disc molding space and a riser is disposed in the other, and a weir is connected and arranged in the rim molding space, so that the disc molding space is Since the molten metal is passed through a place away from the cooling means, a large space can be taken up near the disk forming space, which not only allows for sufficient cooling of the disk part, but also allows for sufficient molten metal to flow from the feeder. As a result, the structure of the disc portion of the cast vehicle wheel can be made finer and the generation of cavities can be prevented, and the strength can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of a molding device for a vehicle wheel according to the present invention, and FIG. 1 is a sectional view, and FIG. 2 is an enlarged view of the main part of FIG. 1. Disc front side mold (lower mold) Disc back side mold (upper mold) Design front side mold (lower mold) Design back mold (upper mold) Rim mold disc molding space feeder space main cooling hole (cooling means) Auxiliary cooling hole (cooling means) Design molding space Rim molding space Weir runner Molten metal holding furnace Hot water pipe patent

Claims (1)

[Claims] (1) In a vehicle wheel molding device whose main parts include a disc molding space, a design molding space, and a rim molding space, a cooling means is placed in one of the disc molding spaces, and a feeder is placed in the other. A molding device for a vehicle wheel, characterized in that a weir is connected and arranged in the rim molding space. (2) The molding device for a vehicle wheel according to claim 1, wherein molten metal is supplied to the rim molding space by a low-pressure casting device.