Simple flexible pressure equalizing pad for hot press molding of composite material and application thereof

Abstract

The invention discloses a simple flexible pressure equalizing pad for hot press molding of a composite material and application thereof. The simple flexible pressure equalizing pad comprises a demolding cloth layer and a fiber cloth layer, wherein the demolding cloth layer is laid and attached to the fiber cloth layer. The simple flexible pressure equalizing pad is mainly used for assisting the molding process of a composite material part autoclave. Compared with a traditional pressure pad, the simple flexible pressure equalizing pad is simple in structure, low in manufacturing cost and shortin preparation period; and the flexibility of the simple flexible pressure equalizing pad is better than that of the pressure pad, the matching degree of the simple flexible pressure equalizing pad and a composite material part in the auxiliary molding process is good, and the surface smoothness of the composite material part after molding is better guaranteed.

Description

Technical field [0001] The invention relates to a simple and flexible pressure equalizing pad used for hot pressing of composite materials and its application. Background technique [0002] Resin-based carbon fiber composite materials have high specific strength, high specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. It is currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. Among the various carbon fiber composite material molding processes, the autoclave process has uniform molding temperature and pressure, and has good adaptability to parts of different materials, shapes, sizes, and structures. Therefore, it has become a research and manufacturing aerospace high-quality composite One of the main processing methods of material components. [0003] When using the autoclave process to form composite parts, due to the high pressure in the...

AI Technical Summary

Problems solved by technology

However, the use of metal or rubber pressure pads mainly has the following problems: (1) The cost of metal pressure pads is relatively low, but they need to be preformed, and their shape is relatively poor. Uneven pressure during curing, or local resin-rich, surface damage and other problems; (2) When manufacturing rubber pressure pads, it is necessary to manufacture pressure pad molding tools, use rubber and internal reinforcing fibers to cure the corresponding profile, and have good conformability , but the cost is high, the manufacturing process is complicated, and the rubber is easily oxidized at high temperature. After being put into the tank many times, there are problems such as deformation and surface damage, which affect the quality of the parts and can be reused less often

Therefore, when using the traditional pressure pad solution to manufacture parts, the preparation process is relatively complicated, the preparation cycle is long, the cost is high, and the later maintenance is inconvenient. These shortcomings are especially obvious when manufacturing simple flat or curved surface parts.

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