A demoulding device and demoulding method for composite material thin-walled pipe with large length-to-diameter ratio

Abstract

The invention discloses a de-molding device for a large-length-diameter-ratio composite material thin wall pipe and a de-molding method of the de-molding device. The de-molding device comprises a first end part baffle, de-molding brackets, sleeve ring baffles, sleeve ring baffle adjusting devices, a de-molding ejection power device and a de-molding ejection rod, wherein more than two long-strip-shaped de-molding brackets are arranged and are uniformly arranged along the periphery on the same side of the first end part baffle; each sleeve ring baffle comprises more than two baffle sections and the baffle sections are located in a space formed by enclosing of the de-molding brackets and are connected with the de-molding brackets by the sleeve ring baffle adjusting devices; the shape formed by the baffle sections of the same sleeve ring baffle is the same as the shape of the outer surface of the large-length-diameter-ratio composite material thin wall pipe in the length direction; the de-molding ejection rod is connected with the de-molding ejection power devices; and the de-molding ejection rod penetrates through the first end part baffle to stretch into the space formed by the de-molding brackets. The de-molding device is suitable for de-molding the large-length-diameter-ratio composite material thin wall pipe with the axial compression strength weaker than the friction force between a product and a mold.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a demoulding device and a demoulding method for thin-walled pipes of composite materials with a large length-to-diameter ratio. Background technique [0002] With the development of modern technology, people have higher and higher requirements for composite pipes, such as large aspect ratio, thin wall, and complex cross-sectional structure of pipes. In order to ensure the dimensional accuracy of the inner surface of composite pipes, mandrel molding is usually used, and the difficulty of demoulding is a key factor limiting the development of mandrel molding to prepare composite thin-walled pipes. At present, the demoulding method for preparing pipes by mandrel molding is as follows: [0003] Mold pretreatment: At present, the mold pretreatment methods considered in the demoulding of composite pipes include mold release agent, mold release wax, vacuum bag and mold su...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the demoulding mold of the composite material thin-walled tube core mold in the prior art: the design is complex and the processing accuracy is high; the traditional machine tool is difficult to meet the requirements, and there are gaps in the mold combination interface, which affects the accuracy and appearance quality of the final product; the mold repeats It is easy to deform when used, and the stability is poor; the cost of mold manufacturing is high, and it is not suitable for thin-walled pipes with large aspect ratios. The invention provides a demoulding device and a demoulding method for composite thin-walled pipes with large aspect ratios The present invention is especially suitable for demolding of fiber fabrics pre-woven on the surface of the mould, whose axial compressive strength is less than the frictional force between the product and the mould.

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