Preparation method for stably producing pultrusion flat plate at high speed

Abstract

The invention relates to the technical field of composite material pultrusion processes, in particular to a preparation method for high-speed stable production of a pultrusion flat plate, which comprises the following steps: a plurality of fibers are independently unwound from a creel, are pulled to pass through guide holes of a thread passing bracket and a threading plate, and then are distributed and output; glue dipping treatment is conducted through a glue tank, glue is supplemented in time according to the consumption of glue liquid consumed by fibers, and the viscosity of the glue liquid in the glue tank is kept within the range of 800 mPa.s to 6000 mPa.s; the impregnated fibers penetrate through a pre-forming plate to form impregnated yarn bundles; the impregnated yarn bundles enter a heated forming mold to be subjected to curing forming; drying and cooling the product; and drawing and cutting the product to obtain a finished product with the required length. Compared with a traditional pultrusion preparation process, the preparation method of the pultrusion flat plate has the advantages that the pultrusion speed of the composite pultrusion flat plate is increased, the continuous and stable production time is greatly prolonged to about 30 days, the plate manufacturing cost is reduced, the material waste in the production process is reduced, and the stable and reliable quality of the pultrusion flat plate is guaranteed.

Description

technical field [0001] The invention relates to the technical field of composite material pultrusion technology, in particular to a preparation method for high-speed and stable production of pultruded flat plates. Background technique [0002] With the development of pultrusion application technology for main beams of wind power blades, the market demand has increased sharply. At present, the level of composite pultrusion process is at low speed (0.6m / min and below) pultrusion. With the increase of speed, the risk of loss of quality control such as product straightness, warpage and damage avoidance increases sharply, which cannot meet the requirements of blade main beam. Use quality standards, lead times, costs and other requirements. At the same time, as the production continues, the viscosity of the pultruded resin will gradually increase, and the reactivity will gradually decrease due to the continuous influence of temperature, moisture and other factors. Generally, the ...

AI Technical Summary

Problems solved by technology

At present, the pultrusion process of composite materials is at a low speed (0.6m / min and below) pultrusion. As the speed increases, the risk of losing control of product quality such as straightness, warpage, and damage avoidance increases sharply, which cannot meet the requirements of the main beam of the blade. Use quality standards, delivery cycle, cost and other requirements

At the same time, as the production continues, the viscosity of the pultrusion resin will gradually increase, and the reactivity will gradually decrease due to the continuous influence of temperature, moisture and other factors. Generally, the equipment must be shut down for cleaning after 5-10 days of continuous production. Cause problems such as low production efficiency, high cost, and high material loss

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