A flame port structure for burning a gas includes a first continuous spiral strip, a second continuous spiral strip and a first outflow passage. The first continuous spiral strip has a first side edge, a second side edge and a first plurality of annular segments, and the second continuous spiral strip has a third side edge, a fourth side edge and a second plurality of annular segments, wherein each of the first plurality of annular segments and each of the second plurality of annular segments respectively have two first longitudinal opposite surfaces and two second longitudinal opposite surfaces. The first outflow passage has a first defining wall formed on each of the first respective longitudinal surfaces from the first side edge to the second side edge. The first outflow passage is structured so that the gas produces a specific combustion.

A flame port structure for burning a gas includes a first continuous spiral strip, a second continuous spiral strip and a first outflow passage. The first continuous spiral strip has a first side edge, a second side edge and a first plurality of annular segments, and the second continuous spiral strip has a third side edge, a fourth side edge and a second plurality of annular segments, wherein each of the first plurality of annular segments and each of the second plurality of annular segments respectively have two first longitudinal opposite surfaces and two second longitudinal opposite surfaces. The first outflow passage has a first defining wall formed on each of the first respective longitudinal surfaces from the first side edge to the second side edge. The first outflow passage is structured so that the gas produces a specific combustion.

A honeycomb panel 1 includes: a honeycomb core 10 having a front surface 10A and a rear surface 10B; and a first plate member 11 provided on the front surface 10A of the honeycomb core 10; a first flange part 111 projecting inside a cell 10S is provided on an end edge of trapezoidal portions 101, 102 of one or more core strips 100 forming the honeycomb core 10, the end edge being positioned on the side of the first plate member 11. The first plate member 11 has one or more through-holes 121 overlapped with the first flange part 111, and is joined to the honeycomb core 10 by welding an outer surface of the first flange part 111, which faces outside through the through-hole 121, and an inner circumferential surface of the through-hole 121.

A honeycomb panel 1 includes: a honeycomb core 10 having a front surface 10A and a rear surface 10B; and a first plate member 11 provided on the front surface 10A of the honeycomb core 10; a first flange part 111 projecting inside a cell 10S is provided on an end edge of trapezoidal portions 101, 102 of one or more core strips 100 forming the honeycomb core 10, the end edge being positioned on the side of the first plate member 11. The first plate member 11 has one or more through-holes 121 overlapped with the first flange part 111, and is joined to the honeycomb core 10 by welding an outer surface of the first flange part 111, which faces outside through the through-hole 121, and an inner circumferential surface of the through-hole 121.

A process and apparatus for forming a structure comprising: a) forming a pack from a skin sheet and a core sheet, wherein venting grooves are formed in a surface of a sheet that is adjacent to the other sheet; b) placing the pack in a mould and heating the pack; c) injecting a first gas between the core and skin sheets to urge the skin sheet against the mould; d) injecting a second gas on the side of the core sheet remote from the skin sheet to urge the core sheet against the skin sheet; e) maintaining gas pressure of the second gas thereby diffusion bonding the sheets; and f) withdrawing some or all of the first gas from the cavity.

A blank for forming a pressed article, the blank including a flat pattern edge configuring an edge on one length direction side of the blank, and an excess portion formed at the flat pattern edge. An edge of the excess portion includes a first convex portion that protrudes toward the one length direction side of the blank with respect to the flat pattern edge, a first concave portion that is adjacent to the first convex portion at a width direction outer side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together, and a second concave portion that is adjacent to the first convex portion at a width direction inner side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together.

A blank for forming a pressed article, the blank including a flat pattern edge configuring an edge on one length direction side of the blank, and an excess portion formed at the flat pattern edge. An edge of the excess portion includes a first convex portion that protrudes toward the one length direction side of the blank with respect to the flat pattern edge, a first concave portion that is adjacent to the first convex portion at a width direction outer side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together, and a second concave portion that is adjacent to the first convex portion at a width direction inner side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together.

A process and apparatus for forming a structure comprising: a) forming a pack from a skin sheet and a core sheet, b) placing the pack in a mould and heating the pack; c) injecting a first gas between the core and skin sheets to urge the skin sheet against the mould; d) injecting a second gas on the side of the core sheet remote from the skin sheet to urge the core sheet against the skin sheet; e) maintaining gas pressure of the second gas thereby diffusion bonding the sheets; and f) injecting a third gas between the skin sheet and the mould, to force the skin sheet against the core sheet.

A process and apparatus for forming a structure comprising: a) forming a pack from a skin sheet and a core sheet, b) placing the pack in a mould and heating the pack; c) injecting a first gas between the core and skin sheets to urge the skin sheet against the mould; d) injecting a second gas on the side of the core sheet remote from the skin sheet to urge the core sheet against the skin sheet; e) maintaining gas pressure of the second gas thereby diffusion bonding the sheets; and f) injecting a third gas between the skin sheet and the mould, to force the skin sheet against the core sheet.

The invention relates to a method, use or a profile for manufacturing metallic flat materials to a cost-effective load-bearing structure of a passenger car and the usage of it. As the main forming manufacturing method the bend forming according to DIN EN ISO 8580 is used.