Method for the preparation of composite material in sandwich form
AssigneeSaint-Gobain Performance Plastics France
InventorsGaëtan Mao, Nicolas Dumont
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Abstract
The object of the invention can be a method of manufacturing a product in the form of a sandwich comprising a core and outer layers. The outer layers may be composed of composite material comprising a fiber-reinforced polymeric matrix. The method uses an insert of heat-resistant material, for example silicone. The object of this invention can be to provide a method of manufacturing a sandwich that dissociates the choice of material of the core of the sandwich from the choice of the material of the outer layers.
Claims8
A method of manufacturing a sandwich-shaped composite material product wherein the sandwich-shaped composite material product comprises two outer layers and a core, the outer layers having a matrix of fiber-reinforced polymeric material, the polymeric material having a melting point below the melting point of the material constituting the fibers;
- wherein the method being is characterized in that it uses an insert consisting of material having a melting point higher than the melting point of the polymeric material, on which the outer layers are consolidated;
- and
- wherein this insert is subsequently replaced by the core of the sandwich-shaped composite material product to form an assembly, the assembly then undergoing a consolidation treatment for bonding the outer layers to the core,
- wherein the method is further characterized in that it comprises the following steps:
- juxtaposition, in a mold, of a fabric or knit made of reinforcing material, the insert, and a second fabric or knit made of reinforcing material;
- injection of a resin of polymeric material under pressure and temperature;
- removal of the insert and insertion of the core of the sandwich;
- consolidation curing to adhere the outer layers to the core of the sandwich;
- cooling of the product thus obtained.
Dependencies are inferred from the claim text.