Method of manufacturing foam-molded products

• US 5,133,912 A
• Filed: 05/30/1990
• Issued: 07/28/1992
• Est. Priority Date: 05/30/1990
• Status: Expired due to Fees

• Current Assignee: Mitsuboshi Belting Limited
• Original Assignee: Mitsuboshi Belting Limited
• Inventors: Hagiwara, Noboru, Izawa, Michiaki, Minami, Masao
• Primary Examiner(s): Jones, W. Gary
• Assistant Examiner(s): Kuhns, Allan R.
• Application Number:
  US07/530,636
• Time in Patent Office: 790 Days
• Field of Search: 264/46.4, 264/46.5, 264/46.6, 264/46.7, 264/46.8, 264/275, 264/277, 264/278, 264/276
• US Class Current: 264/46.4
• CPC Class Codes: B29C 44/143 Means for positioning the lining in the mould in general B29C33/12
• CPC Class Codes: B29L 2031/3005 Body finishings

Abstract

A method of integrating first and second skins into a contiguous cover layer by: providing a first skin with a first surface to be exposed and an opposite backing surface, with the first skin having an offset edge defining a first corner with the exposed part of the first surface; providing a second skin with a second surface to be exposed and an opposite backing surface, with the second skin having an offset edge defining a second corner with the exposed part of the second surface; placing a mold element/partition between the first and second offset skin edges to maintain a space between at least a part of the first and second offset skin edges; pouring a flowable foundation material that will harden against the backing surfaces of the first and second skins so that the hardened foundation material exerts a force tending to urge the first and second corners towards each other; and removing the mold element/partition from between the first and second offset skin edges so that the space between the parts of the first and second offset skin edges diminishes to cause the first and second corners to move closer to each other than they are with the mold element in place.

Claims

1. A method of integrating first and second skins into a contiguous cover layer, said method comprising the steps of:

providing a first skin with a first surface to be exposed and an opposite, backing surface,

said first skin having an offset edge defining a first corner with an exposed part of said first surface;

providing a second skin with a second surface to be exposed and an opposite, backing surface,

said second skin having an offset edge defining a second corner with an exposed part of said second surface;

placing a compressible material on the backing surface of at least one of said first and second skins;

placing a mold element/partition between said first and second offset skin edges to maintain a space between at least a part of said first and second offset skin edges;

pouring a flowable foundation material that expands and hardens against the compressible material on the backing surfaces of the at least one of the first and second skins so that the expanding and hardening foundation material compresses the compressible material and exerts a force tending to urge the first and second corners toward each other; and

removing the mold element from between said first and second offset skin edges so that the space between the parts of said first and second offset skin edges diminishes to cause the first and second corners to move closer to each other than they are with the mold element/partition in place,

wherein said compressible material is less rigid than said expanded and hardened foundation material and said compressible material, upon said mold element being removed, expands to further urge the first and second corners toward each other.

2. The method of integrating first and second skins into a contiguous cover layer according to claim 1 including the step of urging the first and second offset skin edges towards each other and against the mold element/partition as the flowable foundation material is poured against the backing surfaces.

3. The method of integrating first and second skins into a contiguous cover layer according to claim 2 wherein a connecting jig is provided having first and second spaced jaws and including the step of assembling the jig so that the first and second jaws capture at least a part of said first and second skins so that at least parts of said first and second offset skin edges are biasably urged by the jaws towards each other as the foundation material is poured.

4. The method of integrating first and second skins into a contiguous cover layer according to claim 3 wherein the connecting jig is assembled so that parts of the first and second skins and at least a part of the mold element/partition are biasably captured between the first and second jaws.

5. The method of integrating first and second skins into a contiguous cover layer according to claim 4 wherein said connecting jig has a C-shaped cross section with the free ends of the C defining said first and second jaws.

6. The method of integrating first and second skins into a contiguous cover layer according to claim 1 wherein said foundation material is urethane foam.

7. The method of integrating first and second skins into a contiguous cover layer according to claim 1 including a mold having first and second joinable parts defining a cavity into which said flowable material is poured and confined and said mold element is on one of said first and second joinable mold parts.

8. The method of integrating first and second skins into a contiguous cover layer according to claim 7 wherein at least one of the joinable mold parts has a surface complementary to a desired configuration of the surface to be exposed on one of the first and second skins and the surface to be exposed on the one of the first and second skins is forcibly pressed against the complementary mold surface by the foundation material.

9. A method of integrating first and second skins into a contiguous layer, said method comprising the steps of:

providing a first skin with a first surface to be exposed and an opposite, backing surface,

said first skin having an offset edge defining a first corner with an exposed part of said first surface;

providing a second skin with a second surface to be exposed and an opposite, backing surface,

said second skin having an offset edge defining a second corner with an exposed part of said second surface;

placing a compressible material on the backing surface of at least one of the first and second skins,

there being a mold cavity adjacent to the backing surfaces of the skins;

placing a mold element/partition between said first and second offset skin edges to maintain a space between at least a part of said first and second offset skin edges, said offset edge of said first skin being in overlapping relationship with said second skin such that said exposed surface of said first skin contacts said backing surface of said second skin;

pouring a flowable foundation material into the mold cavity against the compressible material so that the compressible material is compressed as the flowable foundation material expands and hardens; and

removing the mold element/partition from between said first and second offset skin edges so that the space between the parts of said first and second offset skin edges diminishes to cause the first and second corners to move closer to each other than they are with the mold element/partition in place,

wherein said compressible material is less rigid than said expanded and hardened flowable foundation material and said compressible material, upon said mold element being removed, expands to urge the first and second corners toward each other.

10. The method of integrating first and second skins into a contiguous layer according to claim 9 including the step of placing a barrier layer around the offset edges of the first and second skins to prevent migration of the foundation material between said offset edges.

11. The method of integrating first and second skins into a contiguous layer according to claim 9 wherein the flowable foundation material is hard urethane foam.

12. The method of integrating first and second skins into a contiguous layer according to claim 9 wherein the first surface of the first skin is fabric.

13. The method of integrating first and second skins into a contiguous layer according to claim 9 wherein the second surface of the second skin is poly vinyl chloride.

14. The method of integrating first and second skins into a contiguous layer according to claim 9 wherein the offset edges of the first and second skins are placed in intimate engagement before the flowable foundation material is poured.

15. The method of integrating first and second skins into a contiguous layer according to claim 9 wherein the compressible material has at least one void to facilitate bending of the one of the first and second skins.

16. A method of integrating first and second skins into a contiguous layer, said method comprising the steps of:

providing a first skin with a first surface to be exposed and an opposite, backing surface,

said first skin having an offset edge defining a first corner with an exposed part of said first surface;

providing a second skin with a second surface to be exposed and an opposite, backing surface,

said second skin having an offset edge defining a second corner with an exposed part of said second surface;

placing a compressible material on the backing surface of at least one of said first and second skins;

placing said first and second skins in a cavity in a mold with the offset edges in adjacent relationship;

exerting a force on the offset skin edges to maintain the first and second corners in spaced relationship;

pouring a flowable foundation material into the cavity;

expanding and hardening the foundation material in said cavity to cause a pressure to be exerted on the first and second skins that urges the first and second corners toward each other and compresses the compressible material;

separating the expanded and hardened foundation material and first and second skins from the mold and releasing the maintaining force on the offset skin edges to allow the expanded and hardened foundation material to urge the first and second corners towards each other,

wherein said compressible material is less rigid than said expanded and hardened foundation material and said compressible material, upon said mold element being removed, expands to further urge the first and second corners toward each other.

17. The method of integrating first and second skins into a contiguous layer according to claim 16 including the step of providing a reinforcing layer in said foundation material.