Resin mold-filling method for manufacturing inverted-U-shaped stringer wallboards

Abstract

The invention provides a resin mold-filling method for manufacturing inverted-U-shaped stringer wallboards by using a VARI technology. The method comprises the following steps: (a) preparing a fiber prefabricated body; cutting fiber cloth according to requirements on fiber angle and size in a digifax, then paving skin and stringers on a forming mold and an inverted-U-shaped stringer core mold, and stitching inverted-U-shaped stringers on the skin after finishing paving, positioning and combining; (b) placing flow guide tubes on two sides parallel to the length direction of the inverted-U-shaped stringers and enabling the resin flowing direction to be vertical to the length direction of the inverted-U-shaped stringers; (c) packaging a vacuum bag; (d) connecting equipment and the flow guide pipes after finishing packaging, and waiting for resin mold-filling. Through the method, a part resin mold-filling flowing channel is innovatively designed; the control problem of flowing of the resin is skillfully solved, so that the internal quality of the parts is ensured; the rate of finished products is increased.

Description

technical field [0001] The invention relates to a VARI (vacuum-assisted resin infiltration) manufacturing technology of "Ω"-shaped long truss wall plate parts, specifically relates to the design of resin filling flow channel and mold filling process control for parts manufacturing, and belongs to the field of composite material manufacturing. Background technique [0002] VARI technology is an important part of liquid forming technology in the field of composite material manufacturing. Compared with traditional prepreg / autoclave technology, it can realize the integral molding of large composite components without using autoclave. Its equipment Small investment and low cost. Compared with the fully closed mold of RTM technology, its mold cost is low. The resin used in VARI technology has the advantages of low viscosity, medium and low temperature mold filling, etc. Therefore, its process cost is also low. In view of the above advantages, at present, this technology is widel...

AI Technical Summary

Problems solved by technology

[0004] However, the existing VARI technology is in the manufacture of such as figure 1 and figure 2 For the "Ω"-shaped long stringer panel part shown (the part is 1400mm long and 400mm wide, and there are three "Ω"-shaped long stringers at equal intervals on one side of the skin of the part), there is not only the problem of difficult resin flow control, but also There are fiber folds on the surface of the parts, and the ends of the stringers are prone to defects such as dry spots and pores

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