JP2001071115A - Mold device of wheel for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unnecessitate the work in a side mold, to easily execute the one side opening of the side mold, to easily manufacture a gate and to improve the efficiency of a casting operation by constituting a sprue runner connected with the outer periphery of a space for forming a rim flange with a lower mold and the side mold and constituting at least the upper surface of the sprue runner with the bottom surface of the side mold. SOLUTION: A casting space S in the shape of a wheel for vehicle is formed with a lower mold 20, side mold 30, upper mold 50 and inserts 51-54. Further, the gate 90 is formed at the boundary between the lower mold 20 and the side mold 30, and opened to the space R for forming the rim flange. The gate 90 is positioned closer to the front rim flange side than the crossing part between a front bead seat part B and the front rim flange part. The bottom surface of the side mold 30 formed as a recessed groove shape on the upper surface of the lower mold 20 covers the upper surface of the sprue runner 91. Molten metal is pressurized and supplied from a molten metal supplying tube 60 and poured into the casting space S and the space R for forming the rim flange through a molten metal storing chamber 61, stokes 62, 63, the sprue runner 91 and the gate 90.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding apparatus for a vehicle wheel, and is used when low-pressure casting of a vehicle wheel is performed.

[0002]

2. Description of the Related Art In a conventional mold apparatus of this type, a sprue passage is connected to the outer periphery of a rim flange forming space in a mold, and pouring is performed through the sprue passage, so that a design surface of a vehicle wheel is blackened. Was prevented from occurring (Japanese Patent Laid-Open No. 6-269923).

[0003]

However, in such a conventional apparatus, the sprue passage is formed in a horizontal parting line, so that the horizontal type requires work and the horizontal type is difficult to open. In addition, there is a disadvantage that it is difficult to make a weir.

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

[0005]

In order to achieve this object, a vehicle wheel molding apparatus according to the present invention includes a vehicle wheel molding apparatus having a rim flange molding space. A sprue passage is connected to the outer periphery, and the sprue passage is constituted by a lower mold and a horizontal mold, and at least the upper surface of the sprue passage is constituted by the horizontal bottom. Therefore, when forming the sprue passage, a concave groove is formed in the lower mold. It is good.

[0006]

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

In FIG. 1, M is a molding device for a vehicle wheel formed by low pressure casting.
The horizontal mold 30, the upper mold 50, and the first nest 51, the second nest 52, the third nest 53, and the fourth nest 5 in the upper mold 50.
4 are formed to form a wheel-shaped casting space S for a vehicle. The vehicle wheel cast in the casting space S has a shape in which the disc portion is offset toward the front rim flange side and is connected to the front side of the front bead seat portion B of the rim portion. The lower wheel 20 is provided on the front side of the disk portion of the vehicle wheel, the horizontal die 30 is provided on the outer side of the rim portion of the wheel, and the upper die 50 is provided on the rear side of the disk portion. It forms the outside of the rim.

[0008] R is a front side rim flange forming space, which is formed in the mold apparatus M as a part of the casting space S.

Next, reference numeral 21 denotes a central gate dam formed in the lower mold 20, which is opened at the center of the casting space S.

Reference numeral 90 denotes the lower mold 20 and the horizontal mold 30.
And is an opening in the rim flange forming space R. Here, the weir 90 is located closer to the front rim flange portion than the intersection of the front bead seat portion B of the rim portion and the front rim flange portion. A gate passage 91 is connected to the weir 90. The gate path 91 is formed in a concave groove shape on the upper surface of the lower mold 20, and the bottom surface of the horizontal mold 30 covers the upper surface opening. The bottom surface of the horizontal die 30 of the sprue passage 91 is formed gradually lower along the outer peripheral direction, and has an effect of reducing the resistance when the horizontal die 30 is released from the mold. Furthermore, if the position of the weir 90 is installed below the front side forming surface (designing part forming surface) of the disk portion of the lower die 20, the effect of protecting the design during transportation is obtained.

Reference numeral 60 denotes a molten metal supply pipe, which is disposed below the mold apparatus M and stands upright in a holding furnace (not shown). Reference numeral 61 denotes a molten metal storage chamber,
It is installed at the upper end of 0. The molten metal storage chamber 61 is a place where the molten metal supplied under pressure by the molten metal supply pipe 60 is temporarily stored. Reference numerals 62 and 63 denote stalks for gates, which are provided upright in the molten metal storage chamber 61. These stokes 62 and 63 penetrate the base 10 and are fitted to the lower mold 20. The stalk 62 is connected to the weir 21, and the stalk 63 is connected to the weir 90. For this reason, the molten metal stored in the molten metal storage chamber 61 is poured into the center of the casting space S via the stalk 62 and the rim flange forming space R via the stalk 63.
It is poured into.

Reference numeral 70 denotes a rim surface forming member of the horizontal die 30, which constitutes a main part of the horizontal die 30. The cavity surface 71 of the rim front side forming member 70 casts from the front side bead seat portion B to the front side flange portion of the vehicle wheel. Reference numeral 72 denotes an annular cutout portion of the rim front side forming member 70.

Reference numeral 80 denotes a rim back side forming member of the horizontal die 30. The rim back side forming member 80 is inserted into the annular cutout portion 72 of the rim front side forming member 70 and fixed to the rim front side forming member 70 with bolts 81, 81. The cavity surface 82 of the rim back side forming member 80 is connected to the cavity portion 72 of the rim front side forming member 70 in a flush state, and casts from the front bead seat portion B to the back side flange portion of the wheel.

Since the volume of the rim front side forming member 70 is larger than the volume of the rim rear side forming member 80, the portion cast by the rim front side forming member 70 is faster than the portion cast by the rim back side forming member 80. It can be cooled down. Further, even if the cavity surface (the molten metal contact surface) of the rim front side forming member 70 is smaller than the cavity surface (the molten metal contact surface) of the rim back side forming member 80, the portion cast by the rim front side forming member 70 may be reduced. The cooling can be performed more rapidly than the portion cast by the rim back side forming member 80.

In any case, if the rim front side forming member 70 is made of a copper alloy having good heat conductivity and the rim rear side forming member 80 is made of iron, the above-mentioned effect is more remarkably exhibited.

The space between the rim front side forming member 70 and the rim back side forming member 80 has the effect of enhancing the mutual heat insulating effect and the heat retaining effect of the rim back side forming member 80.

[0017]

According to the present invention, there is provided a mold apparatus for a vehicle wheel having a rim flange forming space, wherein a sprue passage is connected to an outer periphery of the rim flange forming space, and the sprue passage is lowered. Since the gate port is constituted by a mold and a horizontal mold, and at least the upper surface of the gate port is constituted by the horizontal bottom face, a concave groove may be formed in the lower mold when forming the gate passage.

Therefore, if the mold apparatus for a vehicle wheel is used, the horizontal type does not need to be worked, and the horizontal type can be easily opened, and furthermore, a weir can be easily formed. As a result, the work efficiency of the casting operation can be improved. Can be.

[Brief description of the drawings]

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

[Explanation of symbols]

 R: Rim flange forming space M: Mold device for vehicle wheel 91: Gate passage 20: Lower mold 30: Horizontal mold

Claims (1)

[Claims] In a mold apparatus for a vehicle wheel having a rim flange forming space, a sprue passage is connected to an outer periphery of the rim flange forming space, and the sprue passage is constituted by a lower mold and a horizontal mold. A mold apparatus for a vehicle wheel, wherein at least an upper surface is constituted by the horizontal bottom surface.