Device for preparing sandwich structure composite material by adopting RTM (Resin Transfer Molding) process

The utility model discloses a device for preparing a sandwich structure composite material by adopting an RTM (Resin Transfer Molding) process. The device comprises a lower die, a fiber reinforced material, a sandwich material and an upper die, the upper die covers the lower die, and the upper die and the lower die are sealed by two sealing rubber strips; the sandwich material is arranged in the lower die cavity; gaps are formed between the sandwich material and the upper die as well as between the sandwich material and the lower die; and the fiber reinforced material is filled in the gaps. According to the utility model, the sandwich structure is improved, so that the sandwich structure meets the requirements of adopting an RTM process, and the RTM process is reasonably set and optimally designed by combining the characteristics of a sandwich structure composite material. According to the utility model, the RTM process is applied to the sandwich structure composite material and is extended, so that the manuf