JP2001287014A - Method and device pouring molten metal in low pressure casting apparatus of wheel for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an enclosure of gas into forming spaces for spoke parts and a disk part and also, to secure the good running of molten metal in these spaces. SOLUTION: In a low pressure casting apparatus for a wheel of vehicle provided with a mold device for casting the wheel having a forming space for rim, the forming spaces for spokes and the forming space for disk, after pouring the molten metal into the forming spaces for spokes and the forming space for disk, the molten metal is poured into the forming space for rim.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a low-pressure casting apparatus for a vehicle wheel.

[0002]

2. Description of the Related Art A conventional low-pressure casting apparatus of this type includes a mold apparatus comprising a rim molding space, a spoke molding space, and a disk molding space, and a side gate is provided at a side portion of the rim molding space. Therefore, the molten metal was poured into the disk forming space, the spoke forming space, and the rim forming space.

[0003]

However, in such a conventional low-pressure casting apparatus, since the disk forming space and the spoke portion forming space are located below the side gates, the space from the side gates to these spaces. As a result of the flow of the molten metal, the behavior of the molten metal in these spaces is low in reproducibility, the gas is confined, causing poor running of the molten metal. There was a disadvantage that the hot spring boundary easily occurred.

An object of the present invention is to eliminate these disadvantages.

[0005]

To achieve this object, a method for pouring a low-pressure casting apparatus for a vehicle wheel according to the present invention includes a rim forming space, a spoke forming space, and a disk forming space. In a low-pressure casting apparatus for a vehicle wheel provided with a wheel casting mold apparatus, after pouring into the spoke forming space and the disc forming space, and then pouring into the rim forming space, the spoke forming space And the behavior of the molten metal filled in the disk molding space is to enhance the reproducibility. Further, the low pressure casting apparatus for a vehicle wheel according to the present invention includes a wheel casting mold apparatus having a rim forming space, a spoke forming space, and a disk forming space, and a center gate is provided at a substantially central portion of the disk forming space. And a required number of side gates are provided in the rim forming space, and the lower edge of the side gate is located above the spoke forming space and the disc forming space. It does not flow out of the side gate until it fills the part forming space and the disk forming space.

[0006]

FIG. 1 is a sectional view of a low pressure casting apparatus for a vehicle wheel according to the present invention.

In FIG. 1, D is a low-pressure casting apparatus for casting a vehicle wheel, 1 is a molten metal holding furnace, and 3 is a mold. Reference numeral 21 denotes a support member that supports the mold 3. The molten metal holding furnace 1 is provided below the support member 21.
Is located.

Next, the mold 3 comprises a lower mold 31 and a horizontal mold 32.
And an upper mold 33, an auxiliary mold 34, and a nest 35,
As a cavity, the vehicle wheel forming space 5 includes a disk forming space 51, a spoke forming space 52, and a rim forming space 53.

Reference numeral 61 denotes a center gate,
1 and is open to the disk part forming space 51. From the center 61, the molten metal is poured mainly into the disk forming space 51 and the spoke forming space 52.

[0010] Further, 62, 62 are side gates,
It is provided in the horizontal die 32 and opens to the rim forming space 53. The lower edges of the side gates 62 are formed in the spoke forming space 52 and the disc forming space 51.
It is located above. For this reason, the molten metal poured from the center gate 61 cannot flow from the side gates 62, 62 until these spaces 51, 52 are filled. Accordingly, the spoke portion forming space 52 and the disc forming space 53 are initially formed from the center gate 61.
After the molten metal is poured into the rim forming space 53 via the center gate 61 and the side gate 62, the molten metal can be easily poured. Further, by making the height of the side gate portion 68 higher, the start time of the molten metal pouring from the side gate 62 can be delayed.

Since the side gate 62 is mainly for pouring into the rim forming space 53, a smaller amount of molten metal is supplied than the center gate 61, so that the so-called small gate is smaller than the center gate 61. Becomes

Reference numeral 63 denotes a first cooling water passage,
Is provided in an annular shape. The first cooling water passage 63 mainly cools the design surface side of the spoke forming space 52 while cooling the lower die 31. Therefore, the mechanical strength of the spoke portion of the vehicle wheel to be cast on the design surface side can be improved. Reference numeral 64 denotes a second cooling water passage, which is provided in the auxiliary mold 34 in an annular shape. While the auxiliary mold 34 is being cooled in the second cooling water passage 64, the bolt mounting portion of the disk of the vehicle wheel is cooled. For this reason, the mechanical strength of the bolt attachment portion in the disk of the vehicle wheel to be cast can be improved.

Reference numeral 65 denotes a cooling air supply hole formed in the insert 35, and reference numeral 66 denotes a cooling air supply pipe for cooling the insert 35.

Reference numeral 7 denotes a center stalk, which is connected to the center gate 61, and has a lower end reaching the surface M of the molten metal in the molten metal holding furnace 1. Reference numerals 8 and 8 denote side stokes, which are connected to the side gates 62 and 62, and the lower ends of which reach the molten metal M surface of the molten metal holding furnace 1.

[0015]

The method of pouring a low-pressure casting apparatus for a vehicle wheel according to the present invention provides a low-pressure casting method for a vehicle wheel equipped with a wheel casting mold apparatus having a rim forming space, a spoke forming space, and a disk forming space. In the casting apparatus, after pouring into the spoke forming space and the disk forming space,
Since the molten metal is poured into the rim forming space, the behavior of the molten metal filled in the spoke forming space and the disk forming space is improved in reproducibility.

Accordingly, by using the pouring method of the low-pressure casting apparatus for a vehicle wheel, it is possible to prevent gas from being trapped in the spoke forming space and the disk forming space, and to provide a good run of water in these spaces. It can be secured.

The low pressure casting apparatus for a vehicle wheel according to the present invention includes a wheel casting mold apparatus having a rim forming space, a spoke forming space, and a disk forming space, and is provided at a substantially central portion of the disk forming space. Since the center gate is provided and a required number of side gates are provided in the rim forming space, and the lower edge of the side gate is positioned above the spoke forming space and the disk forming space, the molten metal poured from the center gate. Does not flow out of the side gate until the spoke forming space and the disc forming space are filled.

Thus, using this low-pressure casting apparatus for a vehicle wheel, the center gate is first poured into the spoke forming space and the disk forming space, and then the rim forming space is poured through the center gate and the side gate. Then, the invention of the above-described pouring method can be easily implemented, and since there is no drop of the molten metal from the side gate, it is possible to prevent the generation of the oxide and the generation of the hot water boundary.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an apparatus for preventing inner wall wear of a fluidized bed furnace according to the present invention.

[Explanation of symbols]

 51: Disc forming space 52: Spoke forming space 53: Rim forming space 61: Center gate 62: Side gate D: Low pressure casting device for vehicle wheels

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B60B 3/06 B60B 3/06

Claims (2)

[Claims] In a low pressure casting apparatus for a vehicle wheel provided with a wheel casting mold apparatus having a rim forming space, a spoke forming space, and a disk forming space, pouring is performed into the spoke forming space and the disk forming space. A method of pouring a low-pressure casting device for a vehicle wheel, comprising pouring the molten metal into the rim forming space. 2. A wheel casting mold device having a rim forming space, a spoke forming space, and a disk forming space, a center gate is provided substantially at the center of the disk forming space, and a required number of rim forming spaces are provided in the rim forming space. A low-pressure casting apparatus for a vehicle wheel, wherein a side gate is provided, and a lower edge of the side gate is positioned above the spoke forming space and the disk forming space.