This paper introduces the manufacturing method of the middle fuselage plenum of the light business jet. The middle fuselage is a semi-closed cabin. Considering the detachable mold of the formed parts

and the ease of processing and forming

the tooling cannot be made into a whole. It is manufactured by using the upper and lower parts to solve the problem of insufficient space for parts. After the upper and lower molds are respectively laid and finished

the mold is formed by a co-solidification molding method. In this way

the bearing capacity requirements of the fuselage can be achieved

and the structural weight reduction can be achieved by 30%

and the foundation for the civil airworthiness road of the domestic main bearing composite component is laid. Compared with the original non-integrated fuselage structure

the fuselage of the composite material is co-cured

no fastener connection

no secondary bonding

reducing the number of tooling more than 100

simplifying the entire process of molding.