A molding tool and a method for preparing a rectangular hollow composite material tubular member using the molding tool

Abstract

The invention relates to a forming tool and a method for preparing a rectangular hollow composite material tubular member by using it. The forming tooling includes a main body and auxiliary parts; the main body includes a bottom plate, a left side baffle, a right side baffle and an upper baffle, and the four cooperate with each other to form a rectangular cavity; the upper ends of the left side baffle and the right side baffle are designed as The corner form extending inward; the left side baffle and the right side baffle are detachably connected with the bottom plate, and the upper baffle is detachably connected with the left side baffle and the right side baffle; the auxiliary parts include left auxiliary block, right Side auxiliary block and auxiliary plate; the left auxiliary block and the right auxiliary block are detachably connected with the upper end of the left baffle and the upper end of the right baffle respectively; the auxiliary plate can be placed in a rectangular cavity as an independent piece and when When moving to the top, the left and right sides can be blocked by the corners of the left side baffle and the right side baffle, and the length is not less than the length of the bottom plate. The forming tool can obtain high-quality rectangular hollow tubular members.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a forming tool for forming a rectangular hollow composite tubular member and a method for preparing a rectangular hollow composite tubular member by using the forming tool. Background technique [0002] Advanced composite materials are widely used in the aerospace field due to their high specific strength, high specific modulus, high temperature resistance and corrosion resistance. Both military aircraft and civil aircraft use a large number of composite parts to achieve significant weight reduction. The amount of composite materials has become an important indicator to measure the advancement of aircraft. [0003] At present, for the preparation of large-size, rectangular hollow composite tubes, the molding methods are mainly divided into positive mold molding, silicone rubber expansion molding, water-soluble mandrel or low-temperature melting mandrel mold...

AI Technical Summary

Problems solved by technology

In this patented method, two sets of molding tools need to be prepared, one for curing the product and one for the preparation of the silicone rubber mandrel. The molding quality of the silicone rubber mandrel is required to be high to ensure the molding quality of the product, and the production cost is invested in the early stage. Higher; in the process of thermal expansion of silicone rubber, the force on each part of the preform cannot be guaranteed to be uniform, and the molding quality of the product will be affected; in addition, the molding tooling of the product is split up and down, although the tooling structure is more Simple, but in the mold closing process, it is easy to cause problems such as extrusion of the preform and difficulty in placing the core mold, which is not conducive to ensuring the molding quality of the product

[0005] To this end, a large-size, rectangular hollow composite pipe forming tooling and preparation method is proposed to solve the problems of poor straightness, poor surface profile, uneven pressure, and additional preparation of mandrels in the prior art for composite pipes, and reduce the cost. Cost of production

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