Pre-forming mold for polygonal multi-layer fabric composite material pipe

Abstract

The invention relates to a pre-forming mold for a polygonal multi-layer fabric composite material pipe. Square holes are formed in pre-forming mold bodies at intervals and extend to the circular arcsof the adjacent surfaces; check rings are further disposed on the pre-forming mold bodies; to-be-wrapped fabric enters the pre-forming mold bodies in advance through the surfaces which do not have machined holes, wrapping fabric enters the pre-forming mold bodies later through the square holes, then the pre-formed fabric is wrapped, fabric of the adjacent surfaces enters the pre-forming mold bodies in sequence, and then lap joint is finished in the pre-forming mold bodies. By means of the pre-forming mold for the polygonal multi-layer fabric composite material pipe, the problems that two adjacent pieces of fabric enters the pre-forming mold bodies at the same time, simultaneous deformation, mutual interference and flanging occur, the lap joint is poor, and the transverse strength of a product is low are solved; and meanwhile the risk that mold blocking occurs due to fabric flanging and increased thickness is avoided.

Description

technical field [0001] The invention relates to a pultrusion composite material forming technology, in particular to a polygonal multi-layer fabric pultrusion composite material pipe preforming die. Background technique [0002] One disadvantage of pultruded composite products is the low transverse strength. In order to enhance the transverse strength of the product, fiber fabrics including felts, composite felts, continuous felts and other reinforcing materials are usually used for reinforcement; generally, inner and outer layers of fabric are used, and the middle is fiber. Layer-laying method, but it is obviously not enough for pultruded products with high transverse strength requirements; for general preform molds, when the fabric is lapped here, there will be flanging, resulting in poor lap joints, and the more layers of fabric, this problem The easier it is to produce, the lateral strength of the pultrusion product is greatly reduced; at the same time, the fabric flangi...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a preformed mold with square holes. The fabrics enter the preformed mold successively, which solves the problem that two adjacent pieces of fabrics enter the preformed mold at the same time, deform at the same time, interfere with each other, flanging, and overlap. Poor connection and low lateral strength of the product; at the same time avoid fabric flanging, increased thickness, and the risk of mold blocking

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