Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Reexamination Certificate
2002-05-28
2004-01-13
Eashoo, Mark (Department: 1771)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
C264S046400, C264S046500, C264S171130, C264S171170
Reexamination Certificate
active
06676865
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an extrusion molding adapted to an opening trim, or the like, of a car provided with a hard insert in which reinforcement portions and space portions. are formed alternately longitudinally, and relates to a method of producing such an extrusion molding.
The present application is based on Japanese Patent Application No. Hei. 11-187363, which is incorporated herein by reference.
2. Description of the Related Art
As shown in
FIG. 5
, an opening trim of a car is constituted by an elongated base
100
approximately U-shaped in section, and any insert 1 buried in the base
100
. The base
100
is made of a soft resin such as soft polyvinyl chloride (PVC), thermoplastic olefin (TPO), or the like. The base
100
includes a pair of lip portions
101
which are formed opposite to each other so as to be protruded from opposite inner surfaces, respectively, of the base
100
. On the other hand, as shown in
FIG. 2
, the insert
1
includes a plurality of U-shaped reinforcement portions
10
, and bridge portions
11
connecting the plurality of reinforcement portions
10
to one another successively at intervals of a predetermined distance, by which gap portions
12
are formed between respective adjacent ones of the reinforcement portions
10
. Further, the U-shape of the base
100
is held by the reinforcement portions
10
and the base
100
is made deformable in bending by the presence of the bridge portions
11
and the gap portions
12
.
Accordingly, the opening trim thus formed is incorporated into a vehicle so that an attachment portion of the vehicle is sandwiched between the pair of lip portions
101
. As a result, the attachment portion is clamped by the pair of lip portions
101
, so that the securing strength is secured in a region of the presence of each reinforcement portion
10
. On the other hand, the opening trim can be deformed in bending along the shape of the attachment portion in a region of the presence of each gap portion
12
so that the opening trim is assembled into the vehicle securely.
The opening trim is produced by an extrusion molding method in which the insert
1
and a molten resin for forming the base
100
are extruded simultaneously while supplying the insert and supplying the molten resin to the circumference of the insert.
In the background-art opening trim, however, there was a disadvantage that a surface of the base
100
was uneven between the region where the reinforcement portions
10
were present and the region where the gap portions
12
were present, so that the background-art opening trim looked unattractive and felt unpleasant to the touch.
SUMMARY OF THE INVENTION
The present invention has been attained upon such circumstances and an object thereof is to smooth a surface shape of an extrusion molding which is reinforced with a hard insert having reinforcement portions and gap portions, thereby improving quality in external appearance of the extrusion molding.
In order to solve the above problem, according to an aspect of the present invention, there is provided an insert-containing extrusion molding comprising: a hard insert disposed so as to have a gap portion in at least a portion and so as to be deformable in bending in the gap portion; a foam layer in which the insert is buried and with which the gap portion is filled; and a skin layer with which a surface of the foam layer is coated; wherein the foam layer has an expansion ratio in a portion where the foam layer abuts on a surface of the insert is smaller than an expansion ratio in a portion where the gap portion is filled with the foam layer.
According to another aspect of the present invention, there is provided a method of producing an insert-containing extrusion molding by extruding a hard insert so as to have a gap portion in at least a portion, a foamable resin and a skin resin at once to thereby produce an extrusion molding having the insert, a foam layer in which the insert is buried, and a skin layer with which a surface of the foam layer is coated, wherein a surface of the skin layer is smoothed by performing extrusion molding while controlling the extrusion molding from the the skin layer side so that the foam volume in a portion opposite to a surface of the insert is smaller than the foam volume in a portion where the gap portion is filled when the foamable resin is foamed.
REFERENCES:
patent: 4455338 (1984-06-01), Henne
patent: 5474722 (1995-12-01), Woodhams
patent: 5474841 (1995-12-01), Matsuki et al.
patent: 5651217 (1997-07-01), Mesnel
patent: 5945048 (1999-08-01), Ensinger
patent: 6024906 (2000-02-01), Cook
patent: 6162380 (2000-12-01), Kohn et al.
patent: 6189198 (2001-02-01), Keeney et al.
patent: 6214267 (2001-04-01), Keys
patent: 6312630 (2001-11-01), Hartman
patent: 6360489 (2002-03-01), Burge et al.
patent: 6514604 (2003-02-01), Gopalan et al.
patent: 6604715 (2003-08-01), Howe
patent: 2001/0031351 (2001-10-01), Rood
Kobayashi Masao
Takeda Kazuo
Eashoo Mark
Posz & Bethards, PLC
Toyoda Gosei Co,., Ltd.
LandOfFree
Extrusion molding provided with insert and method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Extrusion molding provided with insert and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extrusion molding provided with insert and method of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3258742