A room temperature curing high temperature resistant auxiliary tooling material system and its manufacturing method

Abstract

The invention belongs to the technical field of composite material manufacturing and provides a manufacturing method of a normal temperature cured high-temperature-resistant auxiliary tool material system suitable for an autoclave molding process. A main body of the auxiliary tool material system is a gradient cured dual component epoxy resin system. According to arrangement of an encapsulating system, materials are successively a composite material blank layer, glass cloth, an imporous isolating membrane, an auxiliary tool blank, polytetrafluoroethylene cloth, a porous isolating membrane, a ventilated felt and a vacuum bag from bottom to top. The materials are packaged and vacuumized and are placed for 8 h at a normal temperature in a negative pressure state to manufacture an auxiliary tool. The auxiliary tool made from glass fiber reinforced plastics is manufactured by taking a normal temperature cured high-temperature-resistant resin system as a primary material through a manual pasting process, so that a good matching property of the auxiliary tool to a molded surface of the blank and the manufacturing simplicity of the auxiliary tool can be achieved simultaneously.

Description

technical field [0001] The invention belongs to the technical field of composite material manufacturing, and relates to a room-temperature curing high-temperature-resistant material system, which is suitable for the manufacture of auxiliary tooling for composite material autoclave forming technology. Background technique [0002] During the manufacturing process of composite materials, in order to ensure the uniform transmission of pressure and obtain better product surface quality, it is necessary to use auxiliary tooling (or process cover) to achieve the above goals. [0003] Traditionally, materials such as metal, prepreg or rubber are often used to manufacture auxiliary tooling. For small curvature or flat laminate products that do not require high internal quality and surface quality, the above-mentioned materials can be used as auxiliary tooling materials. And can meet the required product delivery requirements. However, for laminate products with complex profiles and...

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Problems solved by technology

However, for laminate products with complex profiles and honeycomb sandwich products with large curvature, the auxiliary tooling made of metal cannot completely cover the blank, which often causes the pressure to not be transmitted evenly, resulting in defects inside the product and surface quality that cannot be achieved. Delivery requirements; while using prepreg or rubber as auxiliary tooling, although it can better cover the billet, provide uniform pressure, and obtain relatively excellent internal and surface quality, the auxiliary tooling of this material needs to be tested under high temperature and high pressure conditions. Only the curing or vulcanization process can meet the use requirements, and there are problems such as cumbersome manufacturing process, long manufacturing cycle, and excessive manufacturing cost.

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