Trunk lid

Abstract

The invention provides a trunk lid which is light in weight, low in cost, firm in structure and high in strength. The trunk lid comprises an upper carbon fiber composite layer and a lower carbon fiber composite layer. A closed-cell foam material layer is arranged between the upper carbon fiber composite layer and the lower carbon fiber composite layer and provided with through holes penetrating through the upper surface and the lower surface of the closed-cell foam material layer. The position between the upper carbon fiber composite layer and the closed-cell foam material layer, the position between the lower carbon fiber composite layer and the closed-cell foam material layer and the through holes of the closed-cell foam material layer are all filled with resin. According to the truck lid, the through holes are formed in the closed-cell foam material layer, so that resin channels are formed between the upper carbon fiber composite layer and the lower carbon fiber composite layer, and the wettability of the resin to the upper carbon fiber composite layer and the lower carbon fiber composite layer in the forming process is improved; in addition, the resin can form links which are similar to rivets and penetrate through the closed-cell foam material layer in the forming process; and thus, the carbon fiber composite layers and the closed-cell foam material layer are better and integrally bonded, the bonding strength is maximally improved, and the layering risk is reduced.

Description

technical field [0001] The invention relates to the technical field of automobile cover parts manufacturing, in particular to a trunk cover. Background technique [0002] With the improvement of energy saving and emission reduction requirements, people pay more and more attention to the lightweight structure of automobiles. Due to the remarkable characteristics of carbon fiber composite materials such as high strength, high modulus, low density, and fatigue resistance, in recent years, the application of carbon fiber composite materials has greatly reduced the weight of the car body structure. However, the high cost of carbon fiber production limits the large-scale promotion and application of carbon fiber composite automotive structures to a certain extent. In order to reduce costs, a trunk lid with a foam sandwich structure has appeared at present, which adopts a fiber fabric-foam sandwich-fiber fabric structure. However, the trunk lid of this structure is usually formed...

AI Technical Summary

Problems solved by technology

However, the trunk lid of this structure is usually formed by paste, prepreg and other processes, which is inefficient, and even if the liquid forming process is used, the bonding between the closed-cell foam and the fiber fabric is also weak, due to the closed-cell Porous foam cannot be immersed in resin, and it is easy to cause poor impregnation, dry spots, board-core debonding and other defects during the process

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