Large-size special-shaped sandwich structure and plate based on RTM (Resin Transfer Molding) process

The invention discloses a large-size special-shaped sandwich structure based on an RTM process and a plate, and belongs to the technical field of rail transit plates, the large-size special-shaped sandwich structure comprises a foam layer, in-plane long runners are formed in the outer side face of the foam layer, and the in-plane long runners are arranged in a transversely and longitudinally staggered mode to form a net-shaped runner; the foam layer is further provided with a short runner in the thickness direction of the foam layer. And a plurality of tendons are arranged along the thickness direction of the foam layer. According to the sandwich structure, through the design of the flow channel, resin rapidly circulates in the flow channel and reaches the whole infiltration horizontal plane, effective circulation of the resin is achieved, and the wettability of the whole structure is guaranteed. 本发明公开了一种基于RTM工艺的大尺寸异形夹芯结构及板材，属于轨道交通板材技术领域，包括泡沫层，所述泡沫层外侧面开设面内长流道，面内长流道以横纵交错布置，形成网状流道；所述泡沫层还沿其厚度方向开设短流道；沿泡沫层的厚度方向设置多