FR2877910A1 - Floating vehicle structure, has shell with metal liner receiving foam layer by adhering through adhering interface, resin and mineral fiber layer applied on foam layer, and local reinforcement adhered on resin and mineral fiber layer - Google Patents

Abstract

The structure has a shell with a metal liner (A) receiving a foam layer (B) by adhering through an adhering interface (I1). A resin and mineral fiber layer (E) is applied on the foam layer. A local reinforcement is adhered by another interface on the layer (E), where the connection of the local reinforcement on the layer (E) is made by another mineral fiber and resin layer. An independent claim is also included for a process of manufacturing a floating vehicle structure.

Description

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  Technical field: The patent application concerns a new structure of floating machines and its manufacturing process.

  STATE OF THE PRIOR ART: The construction of floating machines made of steel or carbon steel, stainless steel or aluminum alloy is based on the following principle (FIG. 1): A metal reinforcing reinforcement is made in the transverse direction (D ') then in the longitudinal direction (D ") This frame is covered with sheet metal (A') in order to realize the different elements constituting the floating machine (hull, deck, appendage ...) EA inside this structure is deposited a thermal and acoustic insulation (B ') and a support for preparing the inner part (E'): the facilities and decoration.

  This method requires the implementation of a large number of parts which consequently results in a high weight associated with a high cost.

  The general solution: This new product, a compound based on metal, reduces the number of parts used and ensures the mechanical strength of the structure. It consists of a metal sheet: the skin which is located outside, on which is glued, interior side, a layer of foam. The collage is made by an adhesive or a resin. On this foam is deposited a fiberglass cloth or carbon fiber or other mineral fiber impregnated with resin.

  This composite thus provides several functions: It retains the use and advantages of a metal shell Eil reduces the number of parts implemented -It reduces manufacturing costs Eil reduces the weight of structures Éil provides thermal and sound insulation Éil participates in the finishing of interior fittings The metal-based compound can be used indistinctly on all substrates, steel or carbon, stainless steel, aluminum alloy.

  The foam is of the cross-linked type in order to avoid any retention of water and its density is determined by the structural calculation. Wood such as balsa can also be used in place of the foam.

  2 2877910 The inner layer, resin and mineral fiber, is mono or multidirectional structure and the density is determined by the structural calculation.

  The reinforcements, in the form of foam profiles, are added, as needed, to the structure locally by gluing and bonded by one or more layers of mineral fiber and resin.

  Embodiment: The structure of the floating machine with this new method can be realized in two different ways.

  First method: The hull of the floating machine can be previously formatted and fully assembled. The surface is sharpened by abrasion, and perfectly degreased. The bonding area is coated with resin. The precut foam is positioned on the area in question. The bonding is obtained by placing in depression or any other means of plating. The vacuum plating is done by placing a plastic cover sealed on its perimeter by a flexible seal. In this chamber, partial vacuum is achieved by a vacuum pump. After drying, the foam free surface is coated with resin, and receives the mineral fiber layer. This operation can be carried out simultaneously with the bonding of the foam.

  Second method: This method differs from the previous one by the prefabrication of strakes. These subassemblies are equipped with foam and resin plus fibers as previously. These panels are then assembled on a shaping tool that will give the final shape of the structure. The bonding protocols of the foam and the resin remain identical.

  Presentation of the Various Figures: The accompanying drawings illustrate the invention: FIG. 1 is a sectional view of a structure of floating machines made according to the prior art.

  FIG. 2 is a sectional view of a structure of floating machines made according to the new method. The metal skin (A) receives by gluing, bonding interface (I), 3 2877910 a layer of foam (B). On this layer (B) is deposited a layer of resin and fibers (E).

  Figure 3 shows in section, a structure of floating machines made according to the new method with a reinforcement. The metal skin (A) receives by adhesive a layer of foam (B) on which is deposited a layer of resin and fibers (E). A local reinforcement (D) is glued by the interface (12) on the layer (E). The bond of (D) to (E) is made by the layer of resin and fibers (C).

  FIG. 4 represents a floating structure structure sample produced according to the new method. The metal skin (A) receives the layer of foam (B) coated with resin and fibers (E).

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Claims (3)

CLAIMS 10   1) Floating equipment structure characterized in that the shell comprises a metal layer (A) on which is applied and bonded a layer of foam (B) and on said layer of foam is applied a layer of resin and mineral fiber (E).   2) Method of producing the structure of floating machines according to claim 1 characterized in that the hull of the floating craft (A) is previously shaped and fully assembled. On this shell is glued, interior side, a layer of foam (B). The collage is made by an adhesive or a resin. On this foam (B) is deposited a fiberglass cloth or carbon fiber or other mineral fiber impregnated with resin (E).   3) Process according to claim 2 characterized in that reinforcements (D), in the form of foam profiles, are adjoined, if necessary, to the structure locally by bonding and bonded by one or more layer of mineral fiber and resin ( VS).