Glass steel radar cover single element and forming method thereof

Abstract

The invention relates to a glass steel radar cover single element and a forming method thereof. The radar cover single element is a spherical body, the periphery of which is provided with a sewing structure, wherein the spherical body is formed by assembling the inner skin and the outer skin of the glass steel with a foam core layer and the foam core layer is formed by solidifying injected polyurenthane foam glue material. The forming method comprises the following steps of: presetting a fundamental mould, and copying the female mould and the male mould of the glass steel with the same curvature based on the fundamental mould; respectively manufacturing the inner skin and the outer skin of the radar cover single element on the inner surfaces of the female mould and the male mould of the glass steel; and merging the moulds, and forming an inner cavity between the inner skin and the outer skin. The invention is characterized in that the inner skin is provided with a plurality of through holes which enter into the inner cavity; and the inner cavity is filled with polyurenthane foam glue material from the outside to the inside by the through holes and is solidified to be a foam core layer. The method has simple operation, effectively reduces the use waste of polyurenthane foam, has low cost, guarantees the consilient thickness of the inner skin and the outer skin, and can assemble the radar cover with good safety, reliability and wave permeability.

Description

technical field [0001] The method relates to a fiberglass radome unit and a molding method thereof, and belongs to the field of fiberglass composite materials. Background technique [0002] The function of the FRP radome is to form a closed space around the radar antenna, in which the rotating radar radome is covered, so as to protect the radar antenna system from the direct effect of the atmospheric environment, and at the same time reduce the transmission loss as much as possible. FRP radome materials are generally composed of glass fiber reinforced composite materials and sandwich materials (honeycomb or polyurethane foam). Because polyurethane foam is cheap and can be molded into any size and shape, this makes most FRP radome products adopt polyurethane foam sandwich structure. However, there are two methods for forming the foam sandwich structure at present. One is to make the outer skin on the FRP female mold, and then put the preformed polyurethane foam on the inner ...

AI Technical Summary

Problems solved by technology

However, there are two methods for forming the foam sandwich structure at present. One is to make the outer skin on the FRP female mold, and then put the preformed polyurethane foam on the inner surface of the outer skin to stick and solidify, and then directly Paste the inner skin, which leads to the inconsistent thickness of the inner and outer skins of the product, because the outer skin mold has a layer of anti-ultraviolet gel coat on the smooth surface, and the different thickness of the inner and outer skins affects the wave transmission performance of the product larger

Another method is to use two molds, the inner and outer skins, respectively on the FRP male mold and the FRP female mold according to the same FRP product layering process, to ensure the consistency of the thickness of the FRP radome product skin. After the skin is cured, the preformed polyurethane foam is coated with adhesive on both sides and placed between the inner and outer skins, and then the mold is closed and cured. In this way, although the thickness of the inner and outer skins of the product is the same, the integrality of the molded product is not good, and at the same time Because the adhesive is added in the middle

The thickness of this part causes discontinuity in the material of the FRP radome product, and the wave penetration effect is not ideal

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