CZ21546U1 - Sandwich part with honeycomb lining - Google Patents

Description

Sandwich panel with honeycomb filling

Technical field

The technical solution relates to the production of sandwich panels composed of outer coverings and inner core.

BACKGROUND OF THE INVENTION

Up to now, it is possible to meet sandwich panels in industrial practice where the surface coatings are made of metal sheets or laminate and the core is a metal or non-metallic honeycomb or foam material. Such panels are intended primarily as structural elements for specific applications, for example in the construction of transport aircraft, body parts of rail and road vehicles. All-composite sandwich panels, where the surface coatings are made of laminate (fiberglass, carbon laminate) and the core consists of honeycomb of Nomex and similar materials guarantee very light construction. The disadvantage of all these products is their limited formability, given the limited possibility of forming honeycomb materials, especially in two curves simultaneously. The variability of the thickness of the honeycomb materials, which is based on the nature of the blank in the form of sheets of constant thickness, is also limited. Furthermore, the possibility of selecting the size and shape of the honeycomb cell according to the needs of the proposed member is limited. Another disadvantage is the necessity to incorporate the edge edges of the produced panels (cementing, hemming). Due to the aforementioned limitations, existing applications of sandwich materials are limited primarily to panels of simple shape.

The essence of the technical solution

The essence of the solution is a sandwich panel, the core of which is a honeycomb with a predefined shape, curvature, variable thickness and structure, and the covers are made of laminate or shaped sheet. The panel thus formed retains all the advantages of the sandwich element (high rigidity, low weight) and is not limited by the limitations of the prior art.

The honeycomb of the shaped sandwich panel (hereinafter referred to as the honeycomb) can be designed and manufactured already in the exact shape of the future panel, by subtracting the thickness of the coatings.

The honeycomb can be designed and manufactured with varying shape and size of cells and wall thicknesses so that the panel maximally meets the strength and operational demands placed on it.

The honeycomb may be designed and manufactured in such a way that some of its cells are partially or completely filled with honeycomb building material in order to pre-form the reinforced areas of the panel, for example, for its mounting anchorage.

The honeycomb can be designed and manufactured so that the edge surfaces of the panel are closed by the honeycomb wall without the need for further edge processing.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution will be further elucidated by means of the attached figures. Figure 1 represents the prior art - a conventional sandwich panel. Figure 2 shows an embodiment of a sandwich panel with a spatially shaped honeycomb that can be used, for example, in aircraft structures to optimize the design of the panel dimensions. Figure 3 shows the use of a honeycomb panel as a spatially shaped beam or part of a spatial frame.

Examples of technical solution

The picture part of the document contains three pictures of the sandwich panel:

- 1 CZ 21546 Ul

Figure 1 shows a prior art sandwich panel 2, the flax being characterized by a constant honeycomb thickness 1, open side edges 8 of the sandwich panel 8, and a uniform size and shape of the cells 3.

Figure 2 shows a sandwich panel 2 of the character of a panel with a spatially shaped honeycomb 1. For better clarity, the upper panel of the panel is partially exposed. The panel is characterized by a variable cell size 3 of the honeycomb 1, a variable cell shape 4, a variable cell wall thickness 5, utilizing the possibility of filling selected cells with sandwich building material 6 and closing the side edges 7 of the sandwich panel 2.

Figure 3 shows a sandwich panel 2 having the character of a spatially shaped beam (frame part). For better clarity, the upper part of the workpiece is partially exposed in the picture. The panel is characterized by the general shape of the honeycomb 1, the variable shape of the cell 3 and the closed side edge 2 of the sandwich.

Most of the above properties can be made, for example, using any of the following technologies using the deposition or sintering of metallic or non-metallic materials: Selective Laser Sinte15 Ring (SLS), Fused Deposition Modeling (FDM), Stereolithography (SL), Lamination Systems, 3D Printing (3DP) .

PROTECTION REQUIREMENTS

Claims (1)

Sandwich panel with honeycomb filling, characterized in that the honeycomb (1) forming the core of the sandwich panel (2) has a predefined geometric shape, its cells (3, 4, 5) having 20 the variable size, shape and thickness of the walls and the selected cells (3, 4, 5) are at least partially filled with honeycomb material (6) and the peripheral surfaces of the sandwich panel (2) are formed by a closed honeycomb wall (7).