Pultrusion method for carbon fiber and glass fiber composite board

Abstract

The invention discloses a pultrusion method for a carbon fiber and glass fiber composite board. The pultrusion method comprises the following steps of (1) unwinding yarns on a creel; 2) threading and combing yarns; 3) impregnating carbon fibers in a steeping vat; 4) pre-curing a carbon fiber mold, specifically, pre-curing impregnated carbon fiber yarns through a first pultrusion mold to form a pre-cured carbon plate; (5) impregnating glass fibers in the steeping vat; and (6) finally curing a product, specifically, after glass fiber yarns are impregnated, uniformly distributing the glass fiber yarns around the pre-cured carbon plate according to the specific number of glass fibers, entering a second pultrusion mold, and curing to obtain a carbon-glass mixed pultrusion plate. According to the method, the pultrusion plate which takes the carbon fibers as a sandwich layer and the glass fibers as an outer layer and is used for preparing a blade of a wind power generator can be prepared, the problems that existing carbon fibers are excessive in performance and high in price, and existing glass fibers are insufficient in performance and heavy in mass are solved, the carbon fiber layers in the plate can be neatly arranged in the plate, and the mechanical property of combining the two fibers is exerted to the greatest extent.

Description

technical field [0001] The invention relates to the manufacture of a main beam of a wind power blade, in particular to a pultrusion forming method of a carbon fiber glass fiber composite plate. 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 stiffness requirements of larg...

AI Technical Summary

Problems solved by technology

Although carbon fiber has obvious advantages in performance, its disadvantage of high cost is also obvious. If glass fiber is used to produce wind power blades, there is a defect of increased weight.

[0003] However, there is currently no mature technology related to carbon fiber and glass fiber compounding to produce pultruded girder plates for wind turbine blades, and in the current research technology, there are glass fibers and carbon fibers that cannot be arranged neatly and cannot be well utilized. Fiber properties

Images