RTM die and method for pre-embedded metal nut composite material box

Abstract

The invention discloses an RTM die for a pre-embedded metal nut composite material box. The die comprises a female die, a male die and bolts, wherein a glue injection opening, a glue outlet and threaded holes are formed in the female die, a lower-layer fiber fabric, a composite material plate and an upper-layer fiber fabric are sequentially laid on the male die, a plurality of sets of metal nuts are embedded in the composite material plate, the composite material plate is coated with the upper-layer fiber fabric, nut containing holes are reserved in the upper-layer fiber fabric, the bolts sequentially penetrate through the threaded holes of the female die and the nut containing holes of the upper-layer fiber fabric, and then the metal nuts are screwed into. The invention further discloses an RTM integrated forming process. The manufactured composite material box is provided with the metal nuts, can be stably installed on other equipment, effectively avoids structural and mechanical damage caused by composite material punching, guarantees the sealing performance of the composite material box, can achieve connection and fixation of the composite material box and a metal structure or other equipment, and is better in stability, and the box has the excellent sealing performance.

Description

technical field [0001] The invention belongs to the technical field of integral molding of resin-based composite materials and metal parts, and in particular relates to an RTM molding die for a composite material box with multiple sets of metal nuts pre-embedded, and an integral molding method thereof. Background technique [0002] Compared with traditional lightweight materials, high-performance fiber-reinforced resin-based composite materials have the advantages of low density, high strength, and high modulus, and are widely used in the lightweight design of rail transit equipment. [0003] The RTM molding process is a process technology in which low-viscosity resin flows in closed female and male molds, infiltrates reinforcing materials, and solidifies and forms. With the development of composite material technology, the RTM process is widely used in the production of larger regular parts. The RTM process is low in cost and environmentally friendly. Larger components such...

AI Technical Summary

Problems solved by technology

[0004] Because the punching of composite material structural parts is easy to cause structural and mechanical damage, and damage the sealing performance of the composite material box, it is difficult to connect and fix with other equipment, and it is easy to shake and dump during driving, resulting in potential safety hazards

[0005] Therefore, when the composite material box with multiple sets of metal nuts is pre-embedded, it is easy to cause molding failure when RTM is integrally formed.

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