Method for preparing fiber prepreg filaments by hot-melt method and device thereof

Abstract

The invention relates to a method for preparing fiber prepreg filaments by a hot-melt method and a device thereof. The method provided by the invention comprises the following steps of: 1) placing carbon fiber cone yarns on an unreeling device of a hot-melt prepreg machine according to prepreg production needs; 2) carrying out impregnation on fiber to obtain fiber prepreg; 3) cooling by blowing, entering into a filming device, flattening, spacing, applying and rolling to press and plaster the fiber prepreg at the center of an isolated film to obtain coated fiber prepreg; 4) entering into a reeling device to realize spiral reeling under the control of a reeling controller and a total controller. Therefore, the fiber prepreg filaments are prepared. The invention has the following beneficial effects: the invention is suitable for raw material preparation of fiber reinforced composite products by dry winding or placement moulding production; the reeling length for single fiber prepreg can reach over 3000m, thus reducing the frequency of changing carbon fiber yarns during the production process, raising the production efficiency, decreasing fiber breakage in the product and improving comprehensive performance of the product.

Description

technical field [0001] The invention relates to a method and equipment for preparing fiber prepreg by hot-melt method, which are suitable for raw material preparation of fiber-reinforced composite material products by dry winding or laying and forming. Background technique [0002] Prepregs can be directly used in the manufacture of composite products, and are widely used in aerospace and defense equipment, especially in the manufacture of aircraft propellers, wings, fuselages and some important shell structures. The degree of application of this material directly reflects the level of a country's aerospace industry and national defense equipment. Developed countries such as Europe and the United States have imposed export restrictions and technical blockades on key equipment for the production, application and manufacture of prepregs for a long time, and domestic development in this area is also relatively slow. [0003] The current prepreg preparation is usually prepared ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a method for preparing fiber prepreg by hot-melt method in view of the prior art, which realizes the preparation of a single roll of prepreg fiber with a length of more than 3000 meters to solve the problem of single roll of prepreg. The length of the tape is too short to cause the problem of frequent stoppage and replacement of tape during use, which improves the production efficiency of dry-process composite products; and simplifies the preparation process and production equipment of prepregs, which greatly improves the efficiency of composite prepreg products. Performance and automated molding efficiency

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