Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1999-04-08
2001-04-10
Beck, Shrive (Department: 1762)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C427S282000, C427S434300
Reexamination Certificate
active
06214154
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method for manufacturing a rim of a steering wheel for vehicles, and more particularly, to a method for manufacturing a rim of a steering wheel of high quality using a hydraulic transfer method.
2. Description of the Related Art
FIG. 1
shows an example of a method for manufacturing a rim of a steering wheel for vehicles. As shown in
FIG. 1
, a first molding portion
2
formed of soft PVC or urethane is formed on and around a hub core
1
. Referring to
FIG. 2
, the first molding portion
2
is wrapped with leather
3
, and a wood portion
4
is formed around the remaining hub core
1
by processing wood suitable for the shape of the hub core
1
and attaching the processed wood thereto. Alternatively, the wood portion
4
can be formed by layering wood laminae, cut in the form of a sheet, or mixing sawdust with resin and molding the mixture and attaching a thin wood sheet thereon.
However, the above manufacturing methods are complicated and not suitable for mass production. Also, the manufacturing cost is high.
SUMMARY OF THE INVENTION
To solve the above problems, it is an objective of the present invention to provide a method for manufacturing a rim of a steering wheel for vehicles using a hydraulic transfer method so that a portion of the rim can be manufactured in a large quantity at a relatively low cost while achieving a high quality appearance thereof.
It is another objective of the present invention to provide a method for manufacturing a rim of a steering wheel for vehicles in which a transferring process is performed using a mask tape or a rubber jig (hereinafter, referred to as a mask member) so that various wood patterns and other patterns can be available.
Also, it is yet another objective of the present invention to provide a method for manufacturing a rim of a steering wheel for vehicles by which accurate and clear match of pattern on a steering wheel whose shape is not suitable for transfer is possible.
Accordingly, to achieve the above objective, there is provided a method for manufacturing a rim of a steering wheel for vehicles, which comprises the steps of: (A) forming a molding member of a urethane material which constitutes a part of the rim of a steering wheel; (B) forming a masking portion by attaching a first mask member to a part of a surface of the molding member; (C) forming a first transfer surface by performing a hydraulic transfer on a surface where the first mask member does not adhere; (D) forming a coating film on the first transfer surface; (E) removing the first mask member to reveal a surface where transfer is not performed; (F) performing a second hydraulic transfer on the surface where transfer is not performed; and (G) cleaning the coating film.
To achieve the second objective, there is provided a method for manufacturing a rim of a steering wheel for vehicles, which comprises the steps of: (A) forming a molding member of a urethane material which constitutes a part of the rim of a steering wheel; (B) forming a masking portion by attaching a first mask member to a part of a surface of the molding member; (C) forming a first transfer surface by performing a hydraulic transfer on a surface where the first mask member does not adhere; (D) attaching a second mask member to the first transfer surface and removing the first mask member; and (E) performing a second hydraulic transfer on the surface where the second mask member does not adhere.
To achieve the third objective, there is provided a method for manufacturing a rim of a steering wheel for vehicles, which comprises the steps of: (A) forming a molding member of a urethane material which constitutes a part of the rim of a steering wheel; (B) forming a masking portion by attaching a first mask member to a part of a surface of the molding member; (C) marking a junction line by marking a blade scar approximately at a middle portion of the mask member of the rim of a steering wheel which is placed on a horizontal rotatable table and removing a part of the mask member disposed under the junction line; (D) covering an upper portion of the mask member which is not removed; (E) performing a transfer on a lower surface under the junction line and cleaning and drying the transferred surface and coating a PVA solution on the transferred surface and drying the coated surface; (F) marking a separation line by placing the rim of a steering wheel on the horizontal rotatable table and adjusting and fixing the height of a blade to be disposed about 0.05-0.2 mm lower than that in the step (C); and (G) removing the remaining mask member and a part of a PVA film and performing a second transfer and cleaning and drying a second transfer surface.
REFERENCES:
patent: 4010057 (1977-03-01), Nakanishi
patent: 4229239 (1980-10-01), Arai et al.
patent: 4231829 (1980-11-01), Marui et al.
patent: 5075052 (1991-12-01), Malvassora
patent: 5183688 (1993-02-01), Sorko-Ram
patent: 5750190 (1998-05-01), Woodhall et al.
patent: 5786028 (1998-07-01), Cantwell
patent: 6022438 (2000-02-01), Watanabe et al.
patent: 60-143961 (1985-07-01), None
patent: 61-130081 (1986-06-01), None
patent: 7-117326 (1995-05-01), None
patent: 9-1996 (1997-01-01), None
Beck Shrive
Crockford Kirsten A.
Leydig , Voit & Mayer, Ltd.
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