JPH02151344A - Apparatus for casting wheel for vehicles - Google Patents

Abstract

PURPOSE:To make casting structure of a disk finely by setting cooling means in a mold body providing rim forming space parts as casting space below the casting space, arranging plural gates at side parts of the mold body and opening these gates to the rim forming space parts. CONSTITUTION:A main cooling hole 61 and an auxiliary cooling hole 71 are formed at upper part of the drag 1 and an insert 11, respectively and by circulating cooling fluid, for example cooling water, into the cooling holes 61, 71, the drag 1 and the insert 11 are cooled. The gates 8, 8 are formed at outer part of the rim forming space part 53 and the outside thereof is connected with the runner 81. Below the mold body M, a closed molten metal holding furnace 91 is set and bellows 93 and a heater 94 are set. By allowing compressed air to flow from an air hole 91, the molten metal A rises in molten metal supplying tubes 92 nd passes through the runners 81 and gates 8 to be supplied into the casting space 5 from the rim forming space parts 53. By this method, sufficient cooling of the disk part can be executed and the structure in made fine and strength of the disk part can be improve.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method in which a cooling means is installed in a mold body having a rim forming space as a casting space, and the cooling means is arranged at a lower part of the casting space. The present invention relates to a vehicle wheel casting device.

[Prior art]

Conventionally, in the above-mentioned vehicle wheel casting apparatus, for example, a cooling device is provided around the lower part of the mold body, a dam is formed inside the cooling device, and water is poured into the casting space through the dam. A low-pressure casting device for casting hot water was known (utility development in 1983-
No. 16540).

[Problem to be solved by the invention]

However, in such casting equipment, since a weir was formed inside the cooling device, it was 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 placed in the disc part, making it difficult to cool the sono disc part sufficiently. As a result, it has been difficult to improve the strength of the disk portion.

An object of this invention is to eliminate these disadvantages.

[Means to solve forward bending]

In order to solve the above problems, in the vehicle wheel molding apparatus of the present invention, a cooling means is installed in a mold body having a rim forming space as a casting space, and the cooling means is installed in a lower part of the casting space. A plurality of weirs are provided on the sides of the mold body, and these weirs are opened into the rim forming space.

[Action of the invention]

In the vehicle wheel molding device configured as described above, a plurality of weirs are provided on the side of the mold body, and
Since this weir is opened into the rim forming space, it is possible to fill the casting space with molten metal in a short time, and in order to allow the molten metal to pass through at a location away from the cooling device of the disc part, it is possible to fill the molten metal into the casting space in a short time. The space can be taken up widely, and the disk section can be cooled sufficiently.
As a result, the structure of the disc portion of the cast vehicle wheel can be made finer, and the strength can be improved.

[Description of Embodiments] Hereinafter, embodiments of the present invention will be described with respect to a low pressure casting apparatus based on the drawings.

In FIG. 1, a mold body M for molding a vehicle wheel includes a lower mold 1. It is formed by combining the horizontal molds 2, 2 and the upper mold 3. Note that the lower mold 1 is a support 4
is supported by

The casting space 5 formed in the mold body M includes a disk molding space 51, a spoke molding space 52, and a rim molding space 53. Next, the insert 11 is placed approximately in the center of the lower mold 1, and the surface of the dekes portion (of the vehicle wheel) is molded.

Further, a insert 31 is placed approximately in the center of the upper die 3 to mold the back surface of the disk portion (of the vehicle wheel).

Next, main cooling holes 61 and auxiliary cooling holes 71 are formed in the upper part of the lower mold 1 and the insert 11, respectively, and cooling fluid, such as cooling water, is circulated through these cooling holes 61 and 71 to cool the lower mold. 1 and the insert (of the lower mold 1) 11 are cooled. Note that the main cooling hole 61 and the auxiliary cooling hole 71 correspond to cooling means of the present invention. Further, a plurality of weirs 8.8 are formed outside the rim molding space 53 formed in the upper mold 3, and runners 81 are connected to the outside of these weirs 8. are further connected within the horizontal type 2.2. Further, a sealed molten metal holding furnace 91 is disposed below the mold body M, and the molten metal A is accommodated in the molten metal holding furnace 91.
An air hole 911 through which compressed air is fed is provided at the top. Further, a hot water supply pipe 92.92 is connected to the lower part of the runners 81, 81 in the horizontal type 2.2.
The lower end of 92 opens at the bottom of the molten metal holding furnace 91, and a bellows 93 is installed between the molten metal holding furnace 91 and the hot water supply pipe 92 to seal the inside of the molten metal holding furnace 91. In order to maintain the molten metal A in the holding furnace 91 at a constant temperature,
A heater 94 is installed.

For this reason, if compressed air flows into the molten metal holding furnace 91 from the air hole 911 and pressurizes the molten metal A surface, the molten metal A will be pushed up through the respective hot water supply pipes 92 and 92.
It passes through each runner 81 and its weir 8 and is supplied from the rim forming space 53 to the casting space 5 .

〔Effect of the invention〕

A molding device for a vehicle wheel according to the present invention includes a cooling means installed in a mold body having a rim forming space as a casting space, and the cooling means arranged at a lower part of the casting space. By providing a plurality of weirs on the sides of the mold body and opening these weirs into the rim forming space, a large space can be taken at the bottom of the mold body, making it possible to sufficiently cool the disk part. The casting structure of the disc part can be made fine, the strength of the disc part can be improved, and the pressurizing distance can be shortened, making it easy to achieve directional solidification and producing high-quality vehicle wheels. Not only that, but also the pouring time can be shortened, so it is possible to improve productivity.

[Brief explanation of the drawing]

The drawings show an embodiment of a vehicle wheel molding apparatus according to the present invention, and FIG. 1 is a sectional view. Mold body casting space rim forming space Main cooling hole (cooling means) Auxiliary cooling hole (cooling means) Weir

Claims (1)

[Claims] (1) A vehicle wheel casting apparatus in which a cooling means is installed in a mold body having a rim forming space as a casting space, and the cooling means is arranged at a lower part of the casting space, comprising: a side part of the mold body; 1. A casting device for a vehicle wheel, characterized in that a plurality of weirs are provided in the rim, and these weirs are opened into the rim forming space.