A flexible mold for forming composite long stringers and preparation method thereof

Abstract

The invention belongs to the field of technical manufacturing, and particularly relates to a die for a molded composite material stringer, which can be used for guaranteeing that impressed pressure is effectively transferred in a curing process, effectively controlling the defects of layering and pores and meanwhile guaranteeing the dimensional accuracy of a work piece, and a preparation method thereof. The flexible die comprises at least one molding unit, wherein the section of the molding unit is in an L shape or a C shape; the molding unit which is in the L shape comprises at least one flexible module and two rigid modules; and the molding unit which is in the C shape comprises at least two flexible modules and three rigid modules. The die for the molded composite material stringer and the preparation method thereof have the beneficial effects that the defects of the layering and the pore can be effectively controlled; the location of the die is facilitated; the axis degree and the straightness degree of the stringer are guaranteed; the violent assembly of the die can be avoided; the labor intensity is decreased; the work efficiency is improved; a segmental structure is adopted; and the blocking partition of the flexible die is about to be more flexible.

Description

technical field [0001] The invention belongs to the field of process manufacturing, and in particular relates to a mold for forming a long stringer made of composite materials, which can ensure the effective transmission of external pressure during the curing process, effectively control delamination and pore defects, and ensure the dimensional accuracy of the workpiece and its preparation method. Background technique [0002] L-shaped, T-shaped, J-shaped, C-shaped and I-shaped long trusses are widely used in composite material reinforced wall panels, and composite material reinforced wall panels are generally integrally formed by co-curing or co-gluing. During the forming process, the mold is very important to effectively transmit the applied pressure, control the delamination and porosity defects, and ensure the dimensional accuracy, especially the long stringer forming mold. At present, rigid molds or rubber soft molds are widely used in the field of composite materials. ...

AI Technical Summary

Problems solved by technology

However, due to the low rigidity of the rubber soft mold, it is difficult to position during the assembly process before curing and during the curing process, and it is easy to cause the axis and straightness of the long truss to fail to meet the requirements. In addition, the surface quality of the parts is not good.

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