MULTI-MATERIAL CABINET
A strength-enhanced lightweight cabinet system that employs a combination of lightweight composite materials is disclosed. The materials employ a combination of different processes to create a lightweight cabinet system that is structurally sound and functional. In aspects, the combination utilizes two reaction injection molding processes, and one conventional injection molding process. One of the reaction injection molding processes is IVCR (Improved Vinyl Clad Rigid) while the other is T-RIM™. The combination of these materials and processes results in a cabinet system that reduces the weight considerably over a conventional steel and/or combination of steel and other materials that is used in heavy truck sleeper cabs today.
1 . A multi-composite cabinet system having high structural strength to weight ratio, comprising:
a polymeric carcass having a plurality of cabinet components that define an interior cabinet volume; the polymeric carcass comprises:
a first component with a material flexural modulus of less than 500 MPa; and
a second cabinet component with a flexural modulus of at least approximately 4000 MPa; wherein the first component together with the second component have an overall specific gravity in aggregate less than 1.3.
2 . The multi-composite cabinet system of claim 1 , further comprising a third cabinet component enclosed within the interior cabinet volume.
3 . The multi-composite cabinet system of claim 1 , wherein one of the first component or the second component is a contiguously molded top, back and bottom surface and the other of the first component or the second component is a bottom shelf surface.
4 . The multi-composite cabinet system of claim 1 , wherein one of the first component or the second component is a contiguously molded top and side surface and the other of the first component or the second component is a bottom shelf surface.
5 . The multi-composite cabinet system of claim 1 , wherein one of the first component or the second component is a contiguously molded side and bottom surface and the other of the first component or the second component is a top surface.
6 . The multi-composite cabinet system of claim 1 , wherein one of the first component or the second component is molded via an IVCR (Improved Vinyl Clad Rigid) process and the other of the first component or the second component is molded via a T-RIM™ process, wherein the T-RIM™ process employs injection of a filler to enhance strength of a molded component.
7 . The multi-composite cabinet system of claim 6 , wherein the filler material is wollastonite.
8 . The multi-composite cabinet system of claim 6 , further comprising a door assembly that encapsulates the interior cabinet volume.
9 . The multi-composite cabinet system of claim 6 , further comprising a plurality of injection molded shelves positioned within the interior cabinet volume.
10 . The multi-composite cabinet system of claim 1 , wherein at least one of the first component or the second component includes integrally molded metal inserts that mate to closure magnets.
11 . A method for manufacturing a multi-composite cabinet having a high strength to weight ratio, comprising:
employing a first reaction injection molding process to form a first component;
employing a second reaction injection molding process to form a second component; and
fixedly attaching the first component to the second component to establish a case with a specific gravity of 1.2 or lower.
12 . The method of claim 11 , wherein the first reaction injection molding process is an IVCR (Improved Vinyl Clad Rigid) process.
13 . The method of claim 12 , wherein the second reaction injection molding process is a T-RIM™ process that employs a filler material to enhance strength of a molding.
14 . The method of claim 11 , wherein each of the first and second molding processes comprise an act of inserting a top good into a mold prior to injection of a composite material.
15 . The method of claim 14 , wherein the top good is vinyl.
16 . The method of claim 11 , wherein at least one of the first and second molding processes comprise an act of inserting a metal positioning into a mold prior to injection of a composite material, wherein the metal insert mates to a magnet closure in an assembled cabinet.
17 . A composite cabinet system, comprising;
means for applying a top good to one half of a mold in a reaction injection molding system, wherein the molding system includes a two-part mold;
means for injecting a composite material into a closed two-part mold;
means for positioning a metal insert for encapsulation within the composite material; and
means for de-molding a multi-material cabinet component that includes the top good adhered to a composite part that encapsulates the metal insert.
18 . The composite cabinet system of claim 17 , wherein the means for positioning the metal insert comprises one or more magnets affixed to one side of the two-part mold.
19 . The composite cabinet system of claim 17 , further comprising means for injecting a filler into the composite material, wherein the filler enhances strength of the composite part.
20 . The composite cabinet system of claim 17 , wherein the filler is wollastonite.