JPH01148601A - Automobile wheel and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve heat resistant and decorative properties of a decorative body made of foaming resin by providing cavities between the decorative body fixed to the outer surface of a wheel body and a portion through which a disk composing the wheel body is installed on an axle. CONSTITUTION:An automobile wheel 5 is composed of a wheel body 3 in which a rim 1 and a disk 2 are connected, and a foaming decorative body 4 fixed to the outer surface of the wheel body 3. Cavities 7 are provided between the foaming decorative body 4 and an installing face of a disk 2 on an axle subjected to high temperature due to heat from a break unit. The cavities prevent the transmission of heat generated at the installing face of the disk 2 on the axle to the decorative body 4. It is therefore possible to prevent deformation, separation or the like of the decorative body 4 caused by heat, and to improve the decorativeness of the wheel with the decorative body 4 covering the whole surface of the disk 2.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention was made to add a decorative function to an automobile wheel. The present invention relates to an automobile wheel and a method for manufacturing the same.

[Conventional technology]

Conventionally, so-called design wheels have been proposed for automobile wheels, especially fR wheels, in which foamed urethane is directly molded and fixed on the outer surface of the wheel in order to achieve high strength, low cost, and an aesthetically pleasing decorative appearance. (Special Publication No. 48-36501).

In the design wheel in which the foamed urethane is molded and fixed to the entire outer surface of the wheel, the foamed urethane molded body is also fixed to the front side of the mounting surface of the disk to the axle.

However, due to the structure of a car, a brake device is always located inside the car wheel, and the heat generated by the brake device is easily transferred to the wheel, so the wheel often becomes extremely hot while driving. In particular, the surface where the disc is attached to the axle reaches a temperature of about 200 degrees Celsius due to the direct transmission of heat generated by the brake system, causing the urethane fixed to this area to soften or thermally decompose, causing the urethane foam to fade, deform, and There was a problem that cracking, peeling, etc. occurred.

Therefore, as a heat-resistant measure, a retainer is inserted inside the urethane foam decoration on the front side of the disk mounting surface to prevent the urethane foam from directly adhering to the front surface of the disk mounting surface (Japanese Patent Laid-Open No. 62-71703) or the disk A method in which urethane foam is fixed only on the radially outer side of the mounting surface and a hub cap is attached to the center part (Japanese Patent Application Laid-Open No. 62-944013 has been proposed).

[The problem that the invention attempts to solve]

However, in the above method of inserting a retainer,
There is a problem that not only does the weight of the wheel increase, but also that the heat is easily transmitted through the retainer and reaches the urethane foam, so that the influence of heat on the urethane foam cannot be completely prevented. In addition, in the method of fixing foamed urethane only on the outside of the mounting surface, the three-dimensional outline of the foamed urethane is limited only to the outside of the disc hat part, so the decorativeness is greatly impaired, and the effect of covering with foamed urethane is reduced. The problem is that it cannot be achieved. Further, in any of the above methods, the number of parts increases, the structure becomes complicated, and the manufacturing method is also complicated, resulting in poor productivity and high production costs.

[Means for solving problems]

The present invention has been made in order to solve the above problems, and provides an automobile wheel comprising a wheel body composed of a rim and a disc, and a foamed resin decorative body fixed to the outer surface of the wheel body. In the present invention, there is provided an automobile wheel in which a cavity is provided between the above-mentioned foamed resin decorative body and the mounting surface of the disk to the axle, and in the automobile wheel having the above structure, a plurality of cavities are provided in the portion other than the mounting surface of the disk to the axle. The present invention provides an automobile wheel characterized in that a plurality of holes are provided and a decorative member made of a foamed resin is cast so as to extend through the holes to the back side of the disk.

In addition, the wheel body, which consists of a rim and a disc, is divided into an upper mold and a lower mold! i A step of placing a resin decoration in a mold, a step of injecting foamed resin into the mold from a resin injection port, and a step of curing the foamed resin and fixing the foamed resin decoration to the surface of the wheel body. A method for manufacturing an automobile wheel comprising the steps of taking out the wheel from the mold in a state in which the wheel is placed in the mold, the wheel body being placed horizontally in the mold with the front side of the mounting surface of the disc facing downward, and the wheel being placed in the lower mold. By tightly supporting the nut seat of the disc with the provided nut seat support part and injecting foamed resin from the resin injection port provided at the center of the upper mold or the center of the lower mold, the disc inside the foamed resin decorative body is heated. The present invention provides a method for manufacturing an automobile wheel, characterized in that a cavity is formed in the front side portion of the mounting surface.

(Function) Since the automobile wheel of the present invention has the above-described structure, the foamed resin decorative body is fixed only to a relatively low-temperature part of the wheel body, and the mounting surface of the disc to the axle, which is the highest temperature, is Since a cavity is formed on the front side without using a retainer that easily conducts heat, the heat generated on the mounting surface of the disc to the axle is not transmitted to the foam resin decoration, and the foam resin deteriorates due to heat. , no deformation, cracking, or peeling occurs.

Further, in the method of manufacturing the above-mentioned automobile wheel,
The wheel body is placed horizontally in the mold with the front side of the disc mounting surface facing downward, and the nut seat part of the disc is closely supported by the nut seat support part provided in the lower mold, thereby allowing air to flow from the front side of the disc mounting surface part to the back side. to cut off the flow of water. Furthermore, by injecting foamed resin from the resin injection port provided in the center of the mold, the foamed resin spreads radially from the injection port to fill the cavity surrounded by the wheel body and the lower mold, and the disc hat On the outside of the cavity, the air inside the cavity is forced out from the air pen provided in the well part of the rim or the outer periphery flange part of the disc, and the cavity is filled with foamed resin without generating air bubbles. However, since the outflow of air is blocked at the disk mounting surface, the air is compressed by the foam resin injection pressure and about half is filled with foam resin, but the foam resin is not fixed on the front side of the mounting surface, leaving a cavity. It is something that is formed.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

[Example 1] As shown in FIG. 1, the wheel body 3 is composed of a wheel body 3 in which a rim 1 and a disc 2 are joined by welding, and a decorative body 4 made of foamed resin fixed to the outer surface of the wheel body 3. In the automobile wheel 5, a cavity 7 is provided between the foamed resin decorative body 4 and the mounting surface 6 of the disc 2 to the axle, which reaches the highest temperature due to heat from the brake device.

[Embodiment 2] As shown in FIG. 2(A), a plurality of holes 9 are provided in a portion of the disk 2 other than the mounting surface 6 to the axle, for example, radially outward from the hat portion 8.

The foamed resin decorative body 4 is fixed to the mounting surface 6 of the disk 2 by providing a cavity 7 on the front side thereof, as in the first embodiment, and also having a hole 9 formed therein.
It is cast around to the back side of the disk 2 to form a peeling prevention lO, and is more firmly fixed.

Further, as shown in FIG. 2 (+7), it is also possible to provide decorative holes 11 in the foamed resin decorative body 4 to match the holes 9 provided in the disk 2.

[Example 3] Hereinafter, an example of the method for manufacturing an automobile wheel of the present invention will be described based on the drawings.

As shown in FIGS. 3(a) and 3(0), on the outer circumferential flange portion 12 of the disk 2 and the inner circumferential surface of the well portion 13 of the rim 1,
An air pent 14 is provided in the axial direction of the wheel.

A wheel body is formed by joining the rim 1 and disc 2 described above. This allows air to flow from the air pent 14 at the joint portion from the front side of the disk to the back side. In this case, the air pent 14 may be provided on either the rim l or the disc 2.

As shown in FIG. 4(A), the wheel body 4 configured as described above is assembled into a foamed resin decoration mold 17 (hereinafter simply referred to as mold) consisting of an upper mold 15 and a lower mold 16 of an injection molding machine. Inside, the disk 20 is horizontally arranged with the front side of the mounting surface 6 to the axle facing downward. At this time, each nut seat 18 of the disk 2 is tightly supported by a nut seat support portion 19 provided on the lower die 16 to prevent air from leaking. Since the nut seat support portion 19 also forms a cavity through which a hub nut is passed when installing a completed automobile wheel, it is designed to have a diameter that allows at least a wrench to be inserted therein.

Next, a foamed urethane resin material is injected at a pressure of approximately 100 to 15 Qkgf/e2 from the resin injection port 20 of the resin injection nozzle 21 provided integrally in the center of the upper mold 15 of the mold 1 floor. .

The resin material injected from the resin injection port 20 spreads in the radial direction of the wheel through the resin injection port 2G and between the needle 22 embedded and fixed in the lower die 16 and the hub hole of the disk 2, and spreads in the radial direction of the wheel. The inside of the cavity surrounded by the lower mold 16 is filled.

Here, air pen 1 is attached to the joint between rim 1 and disc 2.
4 is formed, the air in the cavity is pushed out by the resin injection pressure as the foamed resin fills, and the foamed resin completely fills the disc surface of the wheel body 3 and the bead seat of the rim without air bubbles. It is fixed integrally to the back of the part. However, in the inner part of the disk 2 than the hat part 8, the nut seat 18 is sealed by the nut seat support part 19, so there is no joint where air leaks, and the air is compressed by the resin injection pressure, and about half of the air is compressed by the resin injection pressure. As a result, the foamed resin is not fixed to the front side of the mounting surface 6 of the disk 2 to the axle, and a cavity 7 is formed.

After the foamed resin decorative body 4 is cured and fixed to the wheel body 3 as described above, the upper mold 15 is opened and the finished product is taken out.

By the way, in the above embodiment, the resin injection nozzle 2
Although the resin injection port 2G of No. 1 was installed integrally at the center of the upper mold 15, it is also possible to provide the resin injection port 2G integrally at the center of the lower mold 16.

Further, as shown in FIG. 4(B), by providing a recess 23 in the upper mold 15 with a diameter larger than the diameter of the hole 9 in the area of the hole 9 provided in the disk 2, the foamed resin is It also wraps around to the back side of 9 and is fixed, forming a peel stopper 10.

Alternatively, as shown in FIG. 4(c), the hole 9 of the disk 2
In this section, the upper mold 15 is provided with a recess 23 having a diameter larger than the diameter of the hole 9, and the lower mold 16 has an arbitrary shape, the tip of which is smaller than the diameter of the hole 9, and the recess 23 of the upper mold 15 is provided. By providing the decorative hole forming protrusion 24 that comes into contact with the bottom surface of the foam resin decorative body 4, the peel stopper 10 and the decorative hole 11 can be formed in the foamed resin decorative body 4.

In addition, in the above example, M fat was sufficiently distributed to each part,
In addition, the resin injection pressure was set at 100 to 150 kgf so that an appropriate cavity was formed on the front side of the mounting surface of the disc to the axle.
/cm2, but it is not limited to this range, and the size of the cavity can be changed by adjusting the pressure. Also, although urethane foam was used as the foamed resin, other resins could be used. It can also be implemented in the same way.

〔Effect of the invention〕

In the automobile wheel of the present invention, the decorative body made of foamed resin is fixed to the wheel by forming a cavity around the entire surface of the mounting surface of the 111 m disk to the axle. The heat generated during the process is not transmitted to the foam resin decoration, which prevents the foam resin decoration from fading, deforming, cracking, peeling, etc. due to heat.Also, almost the entire disk surface can be covered with the foam resin decoration. Therefore, the decorativeness is not reduced, and the decorativeness can be improved by mixing pigments with the resin and easily applying any color to the surface of the decorative body before coating or spraying.

Furthermore, since no retainer or the like is used, the structure is simple, there is no increase in weight, and it can be manufactured without increasing the number of man-hours, resulting in good productivity and cost reduction.

Furthermore, by providing an air pen between the rim and the disk, resin can be sufficiently filled into joints where resin does not easily flow, making it possible to mold complex designs.

In addition, by casting resin into the holes provided in the disk to form a peeling preventer, the foamed resin decoration can be more firmly fixed and has excellent effects such as being able to prevent peeling. be.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of an automobile wheel of the present invention,
(A) is a plan view, ([+) is A-AM sectional view of (A),
Figures 2 (a) and (b) are sectional views of essential parts showing other embodiments of the automotive wheel of the present invention, and Figure 3 is an embodiment of the rim and disc used in the automotive wheel of the present invention. (a) is a partially cutaway front view of the disk, (a) is a partially cutaway front view of the disk, (
σ) is a partially broken sectional view of the rim, FIG. C) is a sectional view of a main part of a mold showing an example of a pond. l...Rim 2...Disc 3...
Wheel body 4... Foamed resin decoration body 5...
Auto, car wheel 6...Mounting surface 7...Cavity
8... Hat part 9... Hole
10... Peeling prevention 11... Decorative hole 1
2... Outer flange part 13... Well part
14... Air pen 15... Upper mold
16... Lower mold 17... Foamed resin decoration mold 18... Nut seat 19... Nut seat support part 20... Resin injection port 21... Nozzle 22
... Needle 23 ... Recess 24 ... Protrusion for forming a decorative hole Figure 1 (A) (O) Figure 2 Procedural amendment form cap pulled January 11, 1986 Mr. Kunio Ogawa, Commissioner of the Patent Office 2. Name of the invention Automobile wheel and its manufacturing method 3. Relationship with the case of the person making the amendment Patent applicant Hiroshi Kanai 4, 21-6 Higashiyama-cho, Ashiya-shi, Hyogo Prefecture, Agent 6, Subject of amendment (1) ) On page 5 of the specification, line 17, "Rim and disc" is corrected to "Rim and disc." (2) On page 8, line 17, ``Ko 9 ra'' is corrected to ``Ko 9 kara.'' (3) On page 12, line 8, ``ki,'' is corrected to ``kiru,''. (4) Correct figures 4 (a) and (0) in the drawings as shown in the attached sheet.

Claims (4)

[Claims] (1) A wheel body consisting of a rim and a disc,
An automobile wheel comprising a foamed resin decorative body fixed to the outer surface of a wheel body, characterized in that a cavity is provided between the foamed resin decorative body and a mounting surface of the disc to the axle. Wheel for. (2) A plurality of holes are provided in a portion of the disk other than the mounting surface, and a foamed resin decoration is cast around the holes to the back surface of the disk to form a peel-off preventer. The automobile wheel according to item 1. (3) An automobile wheel according to claim 1 or 2, characterized in that an air pent in the axial direction of the wheel is provided in the well portion of the rim and/or the outer peripheral flange portion of the disk. (4) The step of placing the wheel body, which is composed of a rim and a disc, into a foam resin decoration mold that is divided into an upper mold and a lower mold, and foaming from the resin injection port into the foam resin mold. The method includes a step of injecting the resin, and a step of taking out the wheel from the mold after the foamed resin has hardened and the foamed resin decoration is fixed to the surface of the wheel body. A method for manufacturing an automobile wheel having a cavity inside and on the front side of the mounting surface of the disc to the axle, the wheel body being placed horizontally in the mold with the front surface of the disc mounting surface facing downward. The nut seat of the disc is closely supported by a nut seat support provided on the lower mold, and the foamed resin is injected from the resin injection port provided in the center of the upper mold or the center of the lower mold. A method of manufacturing an automobile wheel.