Carpeted, automotive vehicle, load floor including a pivotable cover having a decorative, backside, noise-management, covering
A carpeted, automotive vehicle, load floor including a compression-molded composite panel is provided. A cover of the load floor covers a storage area of the vehicle and is pivotally connected to the composite panel. A substantially continuous carpet layer is bonded to the top surface of the panel and the top surface of the cover to at least partially form the carpeted load floor having a carpeted cover. A living hinge allows the carpeted cover to pivot between different use positions including open and closed positions. A decorative, noise-management covering layer is bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
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This application is a continuation-in-part of U.S. patent application entitled “Carpeted Automotive Vehicle Load Floor Having a Living Hinge” filed Apr. 23, 2012 and having U.S. Ser. No. 13/453,201.
TECHNICAL FIELDThis invention relates, in general, to the field of automotive vehicle load floors and, in particular, to such load floors which are carpeted and have a pivotable cover.
OVERVIEWSandwich-type composite panels having cores have very important characteristics because of their light weight and high strength. Conventionally, such panels are constructed by sandwiching a core having a large number of cavities and having low strength characteristics between two outer layers or skins, each of which is much thinner than the core but has excellent mechanical characteristics.
The prior art discloses a method of making a panel of sandwich-type composite structure having a cellular core in a single processing step. In that method, the panel is made by subjecting a stack of layers of material to cold-pressing in a mold. As shown in
Such a method is particularly advantageous because of the fact that it makes it possible, in a single operation, to generate cohesion and bonding between the various layers of the composite structure as shown in
Panels of sandwich-type composition structure having a cellular core have rigidity characteristics sufficient to enable mechanical structures subjected to large stresses to be reinforced structurally without making them too heavy. Such panels are in common use in shipbuilding, aircraft construction, and rail vehicle construction.
To maximize the functionality of such panels, it is known, in particular, that hinges can be added so that the panels can be hinged to other panels. Such hinges are separate parts that are fixed to the panels by gluing, welding, riveting, or some other fastening technique.
Such hinges are fixed to the sandwich-structure composite panels in a separate and subsequent operation, after said panels have been formed. That subsequent operation requires an additional workstation, be it automated or otherwise, which increases, in particular, the manufacturing time and the manufacturing cost of the finished parts.
In addition, the fact that separate external parts are mounted on a composite panel of the sandwich-type is a source of quality defects, and thus adds to the cost of making such panels.
Published U.S. Patent Application 2005/0189674 discloses a method of making a composite panel of sandwich structure provided with a hinge. The panel includes a stack made up of a first skin of a reinforced thermoplastics material, a cellular core made of a thermoplastics material, and a second skin made of a reinforced thermoplastics material. The panel is formed by pressing the stack in a mold. The first and second skins are preheated to a softening temperature. As shown in
Other U.S. patent documents related to the present invention include: U.S. Pat. Nos. 5,298,694; 5,502,930; 5,915,445; 5,979,962; 6,050,630; 6,102,464; 6,435,577; 6,537,413; 6,631,785; 6,655,299; 6,659,223; 6,682,675; 6,793,747; 6,748,876; 6,790,026; 6,682,676; 6,823,803; 6,843,525; 6,890,023; 6,981,863; 7,014,259; 7,090,274; 7,093,879; 7,264,685; 7,320,739; 7,402,537; 7,419,713; 7,837,009; 7,909,379; 7,918,313; 7,919,031; 8,117,972; 2006/0255611; 2008/0185866 and 2011/0315310.
One problem associated with prior art load floors is that the load floors typically require many assembly stops often involving costly labor. Also, the material making up such load floors is often non-recyclable.
A problem associated with carpeted load floors having covers which cover a storage area in an automotive vehicle is that loose items or objects in the storage area can cause relatively loud, undesirable noises during vehicle travel. Also, when the cover is in its open position the underside of the cover is not particularly visually appealing.
SUMMARY OF EXAMPLE EMBODIMENTSAn object of at least one embodiment of the present invention is to provide a carpeted automotive vehicle load floor including at least one light-weight and strong sandwich-type composite panel, a cover to cover a storage area in the vehicle and a living hinge between the panel and the cover wherein a decorative, noise-management covering layer is bonded to a lower surface of the cover to provide sound insulation in a closed position of the cover and an aesthetically pleasing appearance to the bottom of the cover in an open position of the cover.
In carrying out the above object and other objects of at least one embodiment of the invention, a carpeted automotive vehicle load floor is provided. The load floor includes a composite panel having first and second outer layers, and a core having a large number of cavities and disposed between and bonded to the layers by press molding. The first layer having a top surface. The load floor also includes a cover to cover a storage area of the vehicle and having top and bottom surfaces. The cover is pivotably connected to the composite panel. The load floor further includes a substantially continuous top carpet layer bonded to the top surface of the panel and the top surface of the cover to at least partially form a carpeted load floor having a carpeted cover. A living hinge allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor. A decorative, noise-management, covering layer is bonded in the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
The covering layer may include an acoustical scrim layer.
A portion of the covering layer not bonded to the cover may at least partially form the living hinge.
The living hinge may be a two-way living hinge.
The covering layer may be a nonwoven scrim of fine denier thermoplastic fibers in the form of a sheet. The fibers may be spunbond.
A portion of the composite panel may have a reduced thickness to form a depression which receives the carpeted cover in at least one of the use positions. The thickness of carpeted panel may be substantially equal to depth of the depression. The cover-receiving depression may receive the carpeted cover in two use positions. The cover may extend from the living hinge in opposite directions in the two use positions.
The cover may be a thermoplastic cover, such layer may be a thermoplastic scrim layer and the thermoplastic of the cover and the scrim layer may be polypropylene.
The composite panel may have a thickness in the range of 5 to 25 mm.
The scrim layer may be a thermoplastic acoustical scrim layer having thermoplastic fibers which are spunbond.
The cover may include a second compression-molded composite panel including third and fourth cover layers and a second core disposed between and bonded to the third and fourth outer layers. The third and fourth outer layers may be bonded to the second core by press molding.
Further in carrying out the above object and other objects of at least one embodiment of the present invention, a carpeted, automotive vehicle, load floor is provided. The load floor includes a compression-molded composite panel having first and second reinforced thermoplastic skins and a core having a large number of cavities positioned between and bonded to the skins by press molding. The first skin has a top surface. The load floor also includes a cover to cover a storage area of the vehicle and pivotally connected to the panel. The load floor further includes a substantially continuous carpet layer bonded to the top surface of the panel and a top surface of the cover to form a carpeted load floor having a carpeted cover. A living hinge allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor. A decorative, noise-management, covering layer is bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
The covering layer may be an acoustical thermoplastic covering layer.
A portion of the covering layer not bonded to the cover may at least partially form the living hinge.
Still further in carrying out the above object and other objects of the present invention, a carpeted, automotive vehicle, load floor is provided. The load floor includes a compression-molded composite panel having first and second reinforced thermoplastic skins and a core having a large number of cavities and disposed between and bonded to the skins. The first skin has a top surface. The load floor also includes a cover to cover a storage area of the vehicle and having top and bottom surfaces. The cover is pivotally connected to the panel. The cover includes third and fourth reinforced thermoplastic skins and a core having a large number of cavities and disposed between and bonded to the third and fourth skins by press molding. The load floor further includes a substantially continuous carpet layer bonded to the top surface of the panel and the top surface of the cover to form a carpeted load floor having a carpeted cover. A living hinge allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor. A decorative, noise-management, covering layer is bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically appealing appearance to the bottom of the cover in the open position.
The covering layer may include an acoustical scrim layer. A portion of the covering layer not bonded to the cover may at least partially form the living hinge.
Other technical advantages will be readily apparent to one skilled in the art from the following figures, descriptions and claims. Moreover, while specific advantages have been enumerated, various embodiments may include all, some or none of the enumerated advantages.
As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
Referring now to the
Each hinged panel 10 is typically manufactured by providing a stack of material located or positioned within a mold. The stack includes first and second reinforced thermoplastic skins or outer layers 16 and 18, respectively, a core having a large number of cavities such as a thermoplastic cellular core 20 disposed between and bonded to the skins 16 and 18 by press molding. A substantially continuous covering or carpet layer, generally indicated at 21, made of thermoplastics material covers the first skin 16. The skins 16 and 18 are heated typically outside of the mold to a softening temperature. The mold is preferably a low-pressure, compression mold which performs a thermo-compression process on the stack of materials.
A portion 32 of the composite panel 10 is crushed at a predetermined location simultaneously with the step of applying the pressure to compact and reduce the thickness of the cellular core 20 at the predetermined location for form a depression 34 which receives a carpeted cover, generally indicated at 36, of the hinged panel 10 at a pair of use positions as indicated by phantom lines in
The thermoplastic carpet layer 21 not only covers the first skin 18, but also covers and is bonded to a skin 38 of a panel, generally indicated at 40, of the cover 36. An intermediate portion 42 of the layer 21 is not bonded to either the skin 16 or the skin 38 to form a living hinge, generally indicated at 44 (or 12 in
The carpet layer 21 may be a resin carpet and the resin may be polypropylene. One side or both sides of the cover 36 of the hinged panel 10 may be covered with the carpet layer 21 which may be made of a woven or nonwoven material (typically of the carpet type).
As shown in
The cellular core 48 (as well as the core 20) may be a honeycomb core. In this example, the cellular core 48 and the core 20 have an open-celled structure of the type made up of tubes or a honeycomb, and it is made mainly of polyolefin and preferably of polypropylene. It is also possible to use a cellular structure having closed cells of the foam type. Alternatively, the panel 40 may be made of a solid material, such as a solid plastic part, to which the top and bottom layers of the layer 21 are bonded.
Each of the skins 16 and 18 (as well as the skins 38 and 46) may be fiber reinforced. The thermoplastic of the skins 16, 18, 38 and 46, the covering layer 21 and the cores 20 and 48 may be polypropylene. At least one of the skins 16, 18, 38 and 46 may be woven skin, such as polypropylene skin. Each of the skins 16, 18, 38 and 46 may be reinforced with fibers, e.g., glass fibers, carbon fibers or natural fibers. At least one of the skins 16, 18, 38 and 46 may advantageously be made up of woven glass fiber fabric and of a thermoplastics material.
The resulting hinged panel 10 may have a thickness in the range of 5 to 25 mm and the crushed portion of the panel 10 may have a thickness in the range of 3 to 15 mm. The depression 34 may have a depth in the range of 2 to 10 mm.
In one example method of making the hinged panel 10 including the panel 40, stacks of material may be pressed in a low pressure cold-forming mold 22. With respect to a part of the hinged panel 10, the stack is made up of the first skin 16, the cellular core 20, the second skin 18 and a portion of the covering layer 21, and is pressed at a pressure lying in the range of 10×105 Pa. to 30×105 Pa. The first and second skins 16 and 18 are preferably pre-heated to make them malleable and stretchable. Advantageously, in order to soften the first and second skins 16 and 18, respectively, heat is applied to a pre-assembly constituted by the stack made up of at least the first skin 16, of the cellular core 20, and the second skin 18 so that, while a part of the panel 10 is being formed in the mold, the first and second skins 16 and 18 have a forming temperature lying approximately in the range of 160° C. to 200° C., and, in this example, about 180° C. In like fashion, the cover 36 may be formed.
An end portion 52 of the bottom layer of the layer 21 is also bonded to the top surface of the skin 16 and helps to support the carpeted cover 36 in one of the use positions of the cover 36, as indicated in phantom at 54 in
In another use position, indicated at 64 by phantom lines, the cover 36 is completely received within the depression 34 to allow access to the storage area 56 without having to hold the cover 36 open as indicated by the solid line position of the cover 36 in
The covering layer 21 including its top and bottom layers is substantially continuous and may be formed from separate pieces of thermoplastic resin carpet which are subsequently bonded or fused together, such as by heat and/or pressure to carpet the entire top surface of the hinged panel 10 as well as the bottom surface of the cover 36.
Referring now to
The scrim 70 has an open mesh of nonwoven synthetic thermoplastic fibers including a plurality of adjacent openings. The scrim 70 both transmits light to the underlying layer and reflects light while reducing the level of undesirable noise from a storage area to a passenger compartment of the vehicle. The scrim 70 may be manufactured in a color which is substantially the same, complements or is in contrast with the color of the upper carpet. Also, the cover 36′ including the underlying scrim layer 70 can be made in a single compression molding step as in the first embodiment.
While exemplary embodiments are described above, it is not intended that these embodiments describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention. Additionally, the features of various implementing embodiments may be combined to form further embodiments of the invention.
Claims
1. A carpeted, automotive vehicle, load floor comprising:
- a compression-molded composite panel including first and second outer layers and a core positioned between the outer layers and having a large number of cavities wherein the outer layers are bonded to the core by press molding, the first outer layer having a top surface;
- a cover to cover a storage area in the vehicle, the cover having top and bottom surfaces and being pivotably connected to the composite panel;
- a substantially continuous carpet layer bonded to the top surface of the panel and the top surface of the cover to at least partially form a carpeted load floor having a carpeted cover;
- a living hinge formed by an intermediate portion of the carpet layer that bridges the panel and the cover and provides the pivotable connection, which allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor; and
- a decorative, noise-management, covering layer bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in a closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
2. The load floor as claimed in claim 1, wherein the covering layer includes an acoustical scrim layer.
3. The load floor as claimed in claim 1, wherein a portion of the covering layer not bonded to the cover at least partially forms the living hinge.
4. The load floor as claimed in claim 1, wherein the living hinge is a two-way living hinge.
5. The load floor as claimed in claim 1, wherein the covering layer is a nonwoven scrim of fine denier thermoplastic fibers in the form of a sheet.
6. The load floor as claimed in claim 5, wherein the fibers are spunbond.
7. The load floor as claimed in claim 1, wherein a portion of the composite panel has a reduced thickness to form a depression which receives the carpeted cover in at least one of the use positions and wherein thickness of the carpeted cover is substantially equal to depth of the depression.
8. A carpeted, automotive vehicle, load floor comprising:
- a compression-molded composite panel including first and second outer layers and a core positioned between the outer layers and having a large number of cavities wherein the outer layers are bonded to the core by press molding, the first outer layer having a top surface;
- a cover to cover a storage area in the vehicle, the cover having top and bottom surfaces and being pivotably connected to the composite panel;
- a substantially continuous carpet layer bonded to the top surface of the panel and the top surface of the cover to at least partially form a carpeted load floor having a carpeted cover;
- a living hinge formed by an intermediate portion of the carpet layer that bridges the panel and the cover and provides the pivotable connection, which allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor; and
- a decorative, noise-management, covering layer bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in a closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position; wherein a portion of the composite panel has a reduced thickness to form a depression which receives the carpeted cover in two use positions and wherein thickness of the carpeted cover is substantially equal to depth of the depression and wherein the cover extends from the living hinge in opposite directions in the two use positions.
9. The load floor as claimed in claim 2, wherein the cover is a thermoplastic cover.
10. The load floor as claimed in claim 9, wherein the scrim layer is a thermoplastic scrim layer and wherein the thermoplastic of the cover and the scrim layer is polypropylene.
11. The load floor as claimed in claim 1, wherein the composite panel has a thickness in the range of 5 to 25 mm.
12. The load floor as claimed in claim 2, wherein the scrim layer is a thermoplastic, acoustical scrim layer having thermoplastic fibers.
13. The load floor as claimed in claim 12, wherein the fibers are spunbond.
14. The load floor as claimed in claim 1, wherein the cover comprises a second compression-molded, composite panel including third and fourth outer layers and a second core having a large number of cavities positioned between the third and fourth outer layers and wherein the third and fourth outer layers are bonded to the second core by press molding.
15. A carpeted, automotive vehicle, load floor comprising:
- a compression-molded, composite panel having first and second reinforced thermoplastic skins and a core having a large number of cavities disposed between the skins, the skins being bonded to the core by press molding, the first skin having a top surface;
- a cover to cover a storage area of the vehicle, the cover having top and bottom surfaces and being pivotably connected to the composite panel;
- a substantially continuous carpet layer bonded to the top surface of the panel and the top surface of the cover to at least partially form a carpeted load floor having a carpeted cover;
- a living hinge formed by an intermediate portion of the carpet layer that bridges the panel and the cover and provides the pivotable connection, which allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor; and
- a decorative, noise-management, covering layer bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
16. The load floor as claimed in claim 15, wherein the covering layer is an acoustical thermoplastic covering layer.
17. The load floor as claimed in claim 15, wherein a portion of the covering layer not bonded to the cover at least partially forms the living hinge.
18. A carpeted, automotive vehicle, load floor comprising:
- a compression-molded, composite panel having first and second reinforced thermoplastic skins and a core having a large number of cavities and disposed between and bonded to the skins by press molding, the first skin having a top surface;
- a cover to cover a storage area in the vehicle, the cover having top and bottom surfaces and being pivotally connected to the composite panel, the cover comprising third and fourth reinforced thermoplastic skins and a core having a large number of cavities and disposed between and bonded to the third and fourth skins by press molding; and
- a substantially continuous carpet layer bonded to the top surface of the panel and the top surface of the cover to form a carpeted load floor having a carpeted cover;
- a living hinge formed by an intermediate portion of the carpet layer that bridges the panel and the cover and provides the pivotal connection, which allows the carpeted cover to pivot between different use positions including open and closed positions relative to the rest of the load floor; and
- a decorative, noise-management, covering layer bonded to the bottom surface of the cover to reduce the level of undesirable noise in a passenger compartment of the vehicle in the closed position and to provide an aesthetically pleasing appearance to the bottom of the cover in the open position.
19. The load floor as claimed in claim 18, wherein the covering layer includes an acoustical scrim layer.
20. The load floor as claimed in claim 18, wherein a portion of the covering layer not bonded to the cover at least partially forms the living hinge.
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Type: Grant
Filed: Feb 26, 2015
Date of Patent: May 3, 2016
Assignee: GLOBAL IP HOLDINGS, LLC (Sterling Heights, MI)
Inventors: Darius J. Preisler (Macomb, MI), Christopher A. Heikkila (Washington Township, MI)
Primary Examiner: Beverly M Flanagan
Application Number: 14/632,247
International Classification: B60N 3/12 (20060101); B62D 33/04 (20060101); B60R 13/08 (20060101);