Method for manufacturing shape memory polymer core mold by winding composite material component

Abstract

The invention discloses a method for manufacturing a shape memory polymer core mold by winding a composite material component. The method comprises the following steps of: 1, uniformly mixing hydrogenated epoxy resin, hexanediol diglycidyl ether and maleic anhydride according to the molar ratio of 0.5-1.0:0-0.4:2.0, and adding the mixture into a vacuum drying box to remove bubbles to obtain a hydrogenated epoxy resin system; 2, casting the hydrogenated epoxy resin system into a cylindrical mold, placing the cast mold in an oven to be cured, after cooling the mold to room temperature, demolding to obtain a hydrogenated epoxy resin blank; and 3, selecting a core mold shaping mold according to the shape of the required core mold, assembling the hydrogenated epoxy resin blank and the core mold shaping mold, deforming the hydrogenated epoxy resin blank into the shape of the core mold through a blow-moulding process, and cooling the hydrogenated epoxy resin blank to obtain the shape memory polymer core mold. The shape memory polymer core mold manufactured by the method is low in cost, high in efficiency and short in manufacturing period, can be repeatedly used and has obvious economic benefit; and demolding is convenient to perform.

Description

technical field [0001] The invention belongs to the technical field of mandrel making, and in particular relates to a method for making a shape-memory polymer mandrel for composite material member winding molding. Background technique [0002] Filament winding molding technology refers to the process technology in which continuous fibers are impregnated with resin glue, wound on the mandrel according to certain rules under a certain tension, and then cured and formed. There are three winding forms: dry method, wet method and semi-dry method. It is suitable for the manufacture of cylinders, cylinders, spheres and certain positive curvature rotary products. This molding technology has the advantages of high fiber content, good fiber strength, changeable fiber winding direction and suitable for mass production. It has a wide range of applications in aerospace and civil fields. [0003] The mandrel for winding molding of composite components directly affects the dimensional ac...

AI Technical Summary

Problems solved by technology

The advantage of the combined mandrel is that the skeleton can be reused, but its structure is complex, no matter disassembly or scraping of the gypsum layer requires manual operation, the degree of mechanization is low, and the gypsum layer is very brittle, easy to crack, and the yield of the mandrel is not high.

The biggest advantage of the water-soluble sand mandrel over the metal composite mandrel is that it is easier to remove from the composite material product, but the excessive weight of the mandrel has always been the key to restricting the development of the water-soluble sand mandrel, and its manufacturing process is mostly manual operation. The efficiency is very low, which also restricts its development

The metal mandrel has high cost, heavy weight and is not conducive to forming components with large length and diameter, so its application range is also greatly limited

[0004] With the continuous improvement of the application requirements of composite materials, the winding molding of composite material components has higher and higher requirements for the core mold material and the overall rigidity, coaxiality, assembly and disassembly of the core mold. However, the existing core mold has high cost and heavy structure. The assembly, dismantling and deformation of the mandrel cannot meet the further development of composite material winding technology, so it is necessary to carry out research on light-weight and high-rigidity mandrel materials

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