Core mold, manufacturing method of core mold and irregular composite pipe forming method

Abstract

The invention provides a core mold, a manufacturing method of the core mold and an irregular composite pipe forming method, and relates to the technical field of irregular pipe manufacturing. The coremold is made of shape memory materials. The irregular composite pipe forming method comprises the steps that a resin matrix composite prepreg material adheres to the core mold, a composite prepreg lamination layer is formed, then put into an auxiliary rigid mold, pressurized, heated, solidified and cooled, and then a solidified product C is obtained; the temperature of the solidified product C isrisen to be larger than the temperature corresponding to the glass transition point of the core mold, the core mold is converted to be in a rubber state and separated from a solid composite in a peeled mode, and the core mold is drawn out, so that an irregular composite pipe preformed product is obtained; and the surface of the manufactured irregular composite pipe preformed product is subjectedto polishing treatment, so that an irregular composite pipe is obtained. According to the core mold, the manufacturing method of the core mold and the irregular composite pipe forming method, mold removal is easy, the surface accuracy of the product is high, and the core mold, the manufacturing method of the core mold and the irregular composite pipe forming method are suitable for irregular structures which are difficult to achieve mold removal of metal core molds. In addition, the shape memory core mold can be used repeatedly, the production cost is low, and the core mold is suitable for various composite products with the complex shapes.

Description

technical field [0001] The invention relates to the technical field of special-shaped pipe preparation, in particular to a mandrel, a preparation method thereof, and a composite material special-shaped pipe forming method. Background technique [0002] In the prior art, pipes, especially complex pipes, need to use a mandrel as the base film during production, and the mandrel should be removed after the pipe is formed. However, the mandrels in the prior art are mostly rigid and difficult to remove after the pipe is formed. ; And if the core mold is flexible, the lack of rigidity will make the pipe molding uneven. Therefore, the molding method of tubular composite products with complex structures is relatively complicated, and there are problems that the mandrel mold is not easy to demould during the preparation of composite special-shaped tubes, and the traditional mold demoulding process causes great damage to composite special-shaped tubes, and the traditional composite mat...

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is that in the prior art, the molding process of the composite material special-shaped tube is complex and the demoulding is inconvenient

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