Process for manufacturing a padded element

• US 5,096,639 A
• Filed: 08/06/1990
• Issued: 03/17/1992
• Est. Priority Date: 03/28/1990
• Status: Expired due to Fees

• Current Assignee: Woodbridge Foam Corporation
• Original Assignee: Woodbridge Foam Corporation
• Inventors: Hughes, Ian L.
• Primary Examiner(s): Dawson, Robert A.
• Assistant Examiner(s): Kuhns, Allan R.
• Application Number:
  US07/562,925
• Time in Patent Office: 589 Days
• Field of Search: 264/45.1, 264/46.4, 264/46.5, 264/46.6, 264/46.8, 264/257
• US Class Current: 264/46.5
• CPC Class Codes: B29C 44/1238 and having flexible and solid areas
• CPC Class Codes: B29C 44/14 the preformed part being a lining B29C44/1209 takes precedence
• CPC Class Codes: B29L 2031/751 Mattresses, cushions upholstery B29L2031/58
• CPC Class Codes: B60N 2/58 Seat coverings
• CPC Class Codes: B60N 2/5875 by adhesion, e.g. gluing
• CPC Class Codes: B60N 2/5891 characterised by the manufacturing process; manufacturing seat coverings not otherwise provided for

Abstract

A process for manufacturing a padded element using a mold having an upper mold and a lower mold. The process includes placing a cushion member on the lower mold. The upper surface of the cushion member includes a first portion having an open recess with a boundary extending therearound for containing a liquid foamable polymeric composition in the recess. A trim cover with a finished upper surface is placed in contact with the interior surface of the upper mold. A liquid foamable polymeric composition is dispensed in the open recess within the boundary, and the upper mold and the lower mold are closed to cover the open recess and form an enclosure containing the liquid foamable polymeric composition. The polymeric composition expands to fill substantially the enclosure and adheres to the cushion member and to the inner surface of the trim cover.

Claims

1. A process for manufacturing a padded element using a mold including an upper mold having an interior surface corresponding substantially to an upper surface of the padded element and a lower mold having an interior surface corresponding substantially to a lower surface of the padded element, the process comprising the steps of:

(i) placing a cushion member having an upper surface on said lower mold, the upper surface of said cushion member comprising a first portion having an open recess therein, said open recess having a boundary extending therearound for containing a liquid foamable polymeric composition in said open recess;

(ii) placing a trim cover on said upper mold, said trim cover comprising an inner surface and a finished outer surface in contact with the interior surface of said upper mold;

(iii) dispensing a liquid foamable polymeric composition in said open recess within said boundary; and

(iv) closing said upper mold and said lower mold to cover said open recess and form an enclosure containing said liquid foamable polymeric composition, said polymeric composition expanding to fill substantially said enclosure and adhering to said cushion member and to the inner surface of said trim cover.

2. The process defined in claim 1, wherein said cushion member further comprises a second portion corresponding proportionally to the finished surface of the padded element.

3. The process defined in claim 1, wherein the inner surface of the trim cover comprises a layer of material capable of enhancing adhesion between the trim cover and the polymeric composition.

4. The process defined in claim 3, wherein said material is a foam layer.

5. The process defined in claim 3, wherein said material is a reticulated fabric.

6. The process defined in claim 1, wherein the finished upper surface of said trim cover is made of leather.

7. The process defined in claim 1, wherein the finished upper surface of said trim cover is made of vinyl.

8. The process defined in claim 1, wherein the finished upper surface of said trim cover is made of cloth.

9. The process defined in claim 4, wherein the foam layer comprises a polyurethane foam.

10. The process defined in claim 1, wherein said cushion member comprises a polyurethane foam.

11. The process defined in claim 1, wherein said foamable polymeric composition comprises polyurethane

12. The process defined in claim 4, wherein each of the foam layer, said cushion member and said foamable polymeric composition comprises polyurethane.

13. The process defined in claim 12, wherein the padded element is a component of a vehicle seat.

14. The process defined in claim 13, wherein said component is a seat cushion.

15. The process defined in claim 13, wherein said component is a backrest.

16. The process defined in claim 1, wherein the padded element is a component of a seat system.

17. A process for manufacturing a padded element of a seat system using a mold including an upper mold having an interior surface corresponding substantially to an upper surface of the padded element and a lower mold having an interior surface corresponding substantially to a lower surface of the padded element, the process comprising the steps of:

(i) placing a polyurethane cushion member having an upper surface on said lower mold, the upper surface of said cushion member comprising a first portion having an open recess therein and a second portion corresponding proportionally to the upper surface of the padded element, said open recess having a boundary extending therearound for containing a liquid foamable polyurethane composition in said open recess;

(ii) placing a trim cover on said upper mold, said trim cover comprising a finished outer surface in contact with the interior surface of said upper mold and an inner surface comprising a polyurethane foam layer;

;

(iii) dispensing a liquid foamable polyurethane composition in said open recess within said boundary; and

(iv) closing said upper mold and said lower mold to cover said recess and form an enclosure containing said liquid foamable polyurethane composition, said polyurethane composition expanding to fill substantially said enclosure, and adhering to said cushion member and to the foam layer of said trim cover.