# US 8,464,570 B2 · Method for manufacturing S-shaped bent edge on heat-isolating protection metal component

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- Number: US 8,464,570 B2
- Document ID: US8464570B2
- Status: Granted
- Kind: B2
- Application number: 12/337,601
- Filed: 2008-12-17
- Published: 2010-06-10
- Granted: 2013-06-18
- Earliest claimed: 2008-12-05
- Applicants: Xuejun Cui
- Inventors: Xuejun Cui
- Web page: https://patentgrep.com/patent/US8464570B2

## CPC

- B21D 39/02: of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
- B32B 3/02: characterised by features of form at particular places, e.g. in edge regions {(non-uniform thickness B32B3/263)}
- B32B 7/12: using interposed adhesives or interposed materials with bonding properties
- B32B 15/14: next to a fibrous or filamentary layer
- B32B 37/00: Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B 2262/101: Glass fibres
- B32B 2262/105: Ceramic fibres
- B32B 2262/106: Carbon fibres, e.g. graphite fibres
- B32B 2307/304: Insulating
- B32B 2581/00: Seals; Sealing equipment; Gaskets
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A method of making an S-shaped bent edge component comprising: placing in order an upper layer of metal base plate and a lower layer of metal base plate as well as a middle layer of heat-isolating materials in between; fixing the metal base plates with the heat-isolating materials; forming J-shaped edges on the base plates by stamping, and the J-shaped edges of the base plates are perpendicular to a horizontal portion of the metal base plates; each of the J-shaped edges of the base plates has an outwardly bent curve with a crown and a curve end; by means of a stamping step performed by an upper mold M1 with a concave surface and a flat surface and a lower mold M2 with a flat surface, the concave surface of the mold M1 exerts lateral force onto the curve ends so that the J-shaped edges of the base plates inwardly bend towards the upper metal base plate.

## Claims

### Claim 1

A method of forming S-shaped folded edges on a heat-insulating protective metal component comprising the following steps:
placing a first metal base plate (1) to form an upper layer, a second metal base plate (2) to form a lower layer, and heat-insulating materials (3) in between the upper layer and the lower layer to form a middle layer; and then fixing the first and the second metal base plates (1, 2) with the heat-insulating materials (3);
stamping the first and the second metal base plates (1, 2) to form J-shaped edges (4), where the J-shaped edges (4) of the first and the second metal base plates (1, 2) are perpendicular to a horizontal portion of the first and the second metal base plates (1,2) and each of the J-shaped edges (4) has an outwardly bent curve with a crown (5) and an end (6);
using an upper mold (M1) which consists of a concave surface and a flat surface to press against a lower mold (M2) which consists of another flat surface to exert lateral force onto the ends (6) of the J-shaped edges (4) so that the J-shaped edges (4) of the first and the second metal base plates (1, 2) inwardly bend towards the first metal base plate (1) which forms the upper layer;
continuing in pressing the upper mold (M1) downward so that a horizontal flat surface of an edge pressing part of the flat surface of the upper mold (M1) exerts vertical force to the crowns (5) and compresses the J-shaped edges (4) into S-shaped bent folded edges.

### Claim 2 (depends on 1)

The method of forming S-shaped folded edges on a heat-insulating protective metal component as in claim 1, wherein the middle layer of is an air layer or is formed by the heat-insulating materials (3) which consist of ceramic fiber, glass fiber or graphite fiber.