Process for making foam laminates

• US 6,503,426 B1
• Filed: 09/06/2000
• Issued: 01/07/2003
• Est. Priority Date: 07/06/2000
• Status: Expired due to Fees

• Current Assignee: Duracase Proprietary LLC
• Original Assignee: Duracase Proprietary LLC
• Inventors: Horwitz, David James
• Primary Examiner(s): Kuhns, Allan R.
• Application Number:
  US09/656,281
• Time in Patent Office: 853 Days
• Field of Search: 264/46.4, 264/46.5, 264/46.6, 264/46.7
• US Class Current: 264/46.5
• CPC Class Codes: B29C 44/1228 Joining preformed parts by the expanding material
• CPC Class Codes: B29C 44/14 the preformed part being a lining B29C44/1209 takes precedence
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: Y10T 428/233 Foamed or expanded material encased
• CPC Class Codes: Y10T 428/24008 including fastener for attaching to external surface
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]

Abstract

A method and apparatus for fabrication of foam laminates suitable for use in the construction of furniture and case goods are provided. The panel has an upper surface formed from a thermoplastic sheet of material such as PVC. A cavity formed by the interior surfaces of the sheet have suspended therein attachment or mounting hardware which is subsequently encapsulated by an in situ structural foaming step. The resulting laminated panel is useful as a table top, shelving, and as a structural component in a variety of case goods and furniture.

Claims

1. A process of forming a laminated article for use in furniture construction comprising:

providing a thermoplastic sheet;

warming the thermoplastic sheet to a softening temperature;

forming the sheet into a tray-shaped article having an exterior surface and an interior surface;

placing the tray-shaped article within a mold;

suspending at least one insert above the interior surface of the tray-shaped article;

forming in situ a structural foam, the structural foam bonding to at least a portion of the interior surface of the tray-shaped article opposite the insert and further bonding to at least a portion of the insert;

removing the tray-shaped article from the mold.

2. The process according to claim 1 wherein said step of suspending at least one insert further comprises providing an insert which comprises an attachment member for a vertical support.

3. The process according to claim 1 wherein the step of foaming a structural foam further defines providing at least one depression within an exterior surface of the foam.

4. The process according to claim 1 wherein said structural foam defines an exposed surface which is substantially parallel to said exterior surface of said sheet.

5. A process of forming a laminated article for use in furniture construction comprising:

providing a thermoplastic rigid sheet, said sheet having a thickness of at least 2 mm;

warming the thermoplastic sheet to a softening temperature;

forming the thermoplastic sheet into a tray-shaped article having an exterior surface and an interior surface;

placing the tray-shaped article within a mold;

suspending at least one insert above the interior surface of the thermoplastic sheet;

forming in situ a rigid foam, the rigid foam bonding to at least a portion of the interior surface of the thermoplastic sheet and to at least a portion of the insert, a portion of said form positioned between said insert and said interior surface opposite said insert; and

,

removing the article from the mold.

6. A process of forming a laminated article comprising:

providing a substantially rigid sheet comprising a thermoplastic material;

heating the thermoplastic material to a softening temperature;

forming the thermoplastic material into a tray-shaped configuration having an exterior surface, an interior surface, and an edge, an interior of the edge and the interior surface of said tray-shaped configuration defining a cavity;

placing said tray-shaped sheet within a mold;

suspending at least one insert within said cavity and above the interior surface, a portion of said insert extending outside of said cavity;

forming in situ a rigid foam within said cavity, said rigid foam bonding to at least a portion of the interior surface of the thermoplastic sheet and opposite the insert and further bonding to at least a portion of said insert;

removing the article form the mold.

7. The process according to claim 6 wherein said substantially rigid sheet further comprises a pigmented, wood grained, thermoplastic material.

8. The process according to claim 7 wherein said pigmented, wood grained, thermoplastic material has a thickness of at least 2 mm.

9. The process according to claim 6, wherein said rigid foam defines an exterior surface substantially parallel to said exterior surface of said thermoplastic material.

10. The process according to claim 9 wherein said exterior surface of said foam further defines a depression.

11. The process according to claim 6 wherein said rigid foam is substantially flush with an outer margin of said edge.

12. The process according to claim 6 wherein said step of suspending at least one insert further defines suspending a load bearing insert within said cavity.