A kind of rtm molding die and molding method suitable for composite angle material

Abstract

The invention belongs to the technical field of resin transfer molding (RTM) forming, and relates to an RTM forming mould and method suitable for a composite material angle section. According to the RTM forming mould and method, related mould blocks are small in number, the structural form is simple, the manufacturing cost is low, a method for enabling mould assemblies to cooperate and coordinatewith one another is simple, special positioning and limiting devices are not needed, the assemblies can be assembled to theoretical positions, and dimensional accuracy of a mold cavity is ensured; inthe mould assembling process, precise cooperation between an angle section perform and a corresponding core mold assembly as well as between female moulds can be achieved only by depending on providedlateral force when cross-shaped wedge blocks are assembled to the female moulds, relative movement in the up-down direction between the angle section perform and the adjacent core mold assembly as well as between the female moulds is avoided, so that the phenomena of wrinkling, fiber disorder, bridging and the like are prevented from occurring, the forming quality is improved, and the problem ofprecise forming of the composite material angle section is solved.

Description

technical field [0001] The invention belongs to the technical field of resin transfer molding (RTM) forming, and relates to an RTM forming die and a forming method suitable for composite angle materials. Background technique [0002] Resin transfer molding technology (Resin Transfer Molding, RTM) is a typical non-autoclave low-cost composite material molding technology, because it adopts rigid closed (no free surface) mold molding, and the molded parts have high dimension and surface accuracy. And it has the advantages of low pollution, low energy consumption, and high molding efficiency. This technology is more and more widely used in the fields of automobiles, aerospace and other fields. [0003] Angle material is a common structural form in aviation components, and has various cross-sectional shapes and large quantities. When using the traditional RTM process of rigidly closed male and female molds, only one cross-sectional shape of angle material can be formed each time,...

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Problems solved by technology

[0003] Angle material is a common structural form in aviation components, and has various cross-sectional shapes and large quantities. When using the traditional RTM process of rigidly closed male and female molds, only one cross-sectional shape of angle material can be formed each time, and the number of moldings is also limited. The forming efficiency is low; secondly, the traditional angle material RTM forming mold is a combination of male and female molds. When the mold is closed, there is relative movement between the preform and the male and female molds in the up and down direction, and the fibers are prone to wrinkles and fiber disorder. The prefabricated body has no net size, the precision of mold closing is limited, it is difficult to fit well with the mold, and it is prone to wrinkles, "bridging" and other phenomena, so it is difficult to effectively guarantee the molding quality of this structural part

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