Method for forming large-sized composite material box

Abstract

The invention discloses a method for forming a large-sized composite material box. The method includes the following steps that (1) a mold is prepared; (2) a plurality of layers including fiber materials are laid on the outer surface of the mold; (3) a vacuum system is arranged on the upper surface of the laid reinforcing material layer, and a glue inlet pipe and a glue outlet pipe are further arranged; (4) the whole device is wrapped with vacuum, vacuum pumping is conducted, and then air tightness is checked; (5) glue is prepared for mold filling; and (6) demolding is performed after curing, and the product is dressed and processed to be formed. By the adoption of the method, the content of fibers in the formed product is even in distribution, quality is reliable, and process repeatability is good. The whole process can only be completed through a vacuum pump, and no special equipment is required, so that investment is small, labor intensity is low, consumed labor hours is short and cost is low. The process belongs to mold closing forming, the amount of volatilization of harmful gas is small, environmental pollution can be reduced, the good health of operators can be guaranteed, and therefore popularization is facilitated.

Description

technical field [0001] The invention relates to a box forming method, in particular to a large-size composite material box forming method. Background technique [0002] Due to its advantages of effectively improving the storage reliability of missile weapon systems, all-weather adaptability, and rapid battlefield response capabilities, box-type launch technology is adopted by various land-based and ship-based advanced missile weapon systems today. The core and key of the box launch technology is the launch box, and one of its main development trends in the future is the miniaturization and light weight of the launch box. Since the 1970s, fiber composite materials have been widely used in aerospace and other fields due to their high specific strength, high specific modulus, designability of mechanical properties, damping and shock absorption, fatigue resistance, aging resistance, and simple molding process. Get a wide range of applications. [0003] As the main component of...

AI Technical Summary

Problems solved by technology

Wet hand lay-up molding materials have a low strength utilization rate and large human factors, resulting in poor reliability of the batch production process; prepreg autoclave bag pressing process has high investment in raw and auxiliary materials and equipment, and the cost is relatively high, especially large Dimensional products; filament winding molding requires proprietary molding tooling to realize polygonal product molding, and the process is complex to realize

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