Integral molding technique and molding system for supersized composite material member

Abstract

The present invention discloses an integral molding technique and molding system for a supersized composite material member. the integral molding technique includes five steps of vacuum bottling pretreatment, automatically mixing glue, vacuum defoamation, pressure regulating buffering and vacuum bottling, the corresponding molding system includes a automatic glue-mixing system, a debubbling pressure regulating buffering system and a vacuum bottling system. The debubbling pressure regulating buffering system includes a vacuum defoamation system, a pressure regulating pump and a buffering container, the automatic glue-mixing system and the vacuum bottling system are communicated with the buffering container through conveying tubes respectively, the vacuum defoamation system and the pressureregulating pump are communicated with the buffering container through air ducts respectively, each conveying tube and air duct are all provided with valves separately; the mixing glue solution after automatically mixing glue is injected to the buffering container and then is injected to a mould for the integral molding with dual pressures of a positive pressure and a vacuum negative pressure in the buffering container. The molding technique of the invention has advantages of raw material saving, high efficiency, strong serviceability, good product effect, safety, environment protection, etc.

Description

technical field [0001] The invention relates to a forming process and system of a composite material component, in particular to a process and a system for forming a composite material by using resin transfer molding to assist vacuum infusion. Background technique [0002] Super-large composite material components refer to those composite material products with a single-piece molding area of ​​more than tens of square meters, a single-piece weight of more than several tons, and a single-piece size of tens of meters in a certain direction, such as wind power of more than megawatts. Composite blades for generators, large composite hulls, tanks or roofs for large rail vehicles, etc. These ultra-large composite components are usually prepared by a hand lay-up process or a vacuum infusion process (VIP process, Vacuum Infusion Process for short). The hand lay-up process has the disadvantages of low production efficiency, high work intensity, poor working environment, difficult co...

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Problems solved by technology

[0003] However, the traditional VIP process also has the following disadvantages in the preparation of super-large composite components: (1) The ultimate infusion pressure cannot exceed one atmospheric pressure when the resin is infused with vacuum negative pressure, so the infusion speed of the resin and the impregnation of the reinforced material with the resin The effects are all limited, especially in the preparation of super-large composite components, which is not conducive to further improving production efficiency; (2) to prepare super-large composite components, a large number of resin systems need to be pre-configured, and resin mixing cannot be completed in a closed system. A large number of air bubbles will be mixed in the process, and the existence of air bubbles will seriously affect the quality of composite products; and the larger the amount of rubber mixed at one time, the more difficult it is to mix evenly, and it is difficult to refine and mix a large number of resin systems multiple times, so there must be uneven rubber mixing. The problem is that the uneven mixing of glue will inevitably affect the curing quality of composite products; moreover, these resin systems that are pre-mixed with resin and curing agent need large containers to hold them, and the resin systems held in large containers are due to heat dissipation. Not good, it is prone to rapid reaction, which will cause the viscosity of the resin system to increase, which will affect the infusion efficiency and impregnation effect, and may even cause the resin system to explode and cannot be used; (3) After a large number of resin systems are prepared, if the vacuum system is used during use If something goes wrong and needs to be shut down for debugging or other objective reasons cause the resin introduction process to be temporarily interrupted, the remaining unintroduced resin system will continue to react and become unusable, which may cause a large amount of resin system to be wasted

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