Method for continuously producing pultrusion epoxy glass fiber boards for ultra-long time

Abstract

The invention discloses a method for continuously producing pultrusion epoxy glass fiber boards for an ultra-long time. The method comprises the following steps of (1) unwinding yarns on a creel; 2) spreading and guiding yarns; 3) impregnating in double steeping vats; 4) performing; 5) curing and molding a mold; and 6) curing through a post-curing oven to obtain a qualified product, wherein impregnating in the double glue tanks in the step (3) is used for fully impregnating the yarns in steeping vats, and the steeping vats comprise a first steeping vat and a second steeping vat; firstly, the yarns are impregnated into the first steeping vat, and then the yarns impregnated into the first steeping vat are impregnated into the second steeping vat; when the yarns are impregnated in the second steeping vat, the first steeping vat is cleaned; and when the yarns which are not impregnated are impregnated into the first steeping vat, the second steeping vat is cleaned, and the operation is repeated, so that old glue is avoided. According to the method, the problem of old glue can be solved, field production can be well controlled, continuous production without shutdown is realized, and the production efficiency is further improved.

Description

technical field [0001] The invention relates to the production of fiberboards for wind power blades, in particular to a method for continuous production of pultruded epoxy glass fiberboards over a long period of time. Background technique [0002] The main beam of the wind turbine blade is the main load-bearing part of the wind turbine blade, which controls the overall stiffness and ultimate strength of the wind turbine blade in the span direction. With the development of wind power at low wind speeds and offshore, the size of the blades is getting larger and larger, and the weight and bearing requirements of the blades are also increasing, which brings huge challenges to the design of wind power machines and blades. Pultruded sheets are used in the manufacture of wind turbine blades. Carbon fiber pultruded sheets are the first to be used. Carbon fibers have the performance advantages of high specific strength and high specific modulus, which can meet the strength and stiffn...

AI Technical Summary

Problems solved by technology

[0004] At present, in the production process, especially after 5-10 days of production, due to the excessive reaction of the resin during use, after the appearance of old glue, the surface defects of the board increase, the mechanical properties of the board in the 90° direction decrease, and the fatigue performance decreases.

The impact of old glue on production efficiency. Once old glue appears, if it is not cleaned up in time, there will be serious defects in the product until the machine is shut down and continuous production is interrupted.

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