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Improvement related to the composite layup

A composite and cladding technology, applied in the direction of adhesives, etc., can solve the problems of wrinkles and damage to the structural integrity of the finished blade.

Inactive Publication Date: 2012-08-01
VESTAS WIND SYST AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This often results in wrinkling in the material during curing, which compromises the structural integrity of the finished blade

Method used

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  • Improvement related to the composite layup
  • Improvement related to the composite layup
  • Improvement related to the composite layup

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] refer to figure 1 , schematically shows an end effector assembly 10 according to the present invention in side view. The assembly 10 includes a housing 12 shown in phantom which supports a lay-up device 14 comprising a series of lay-up rollers 16 for laying a strip of pre-impregnated fibrous material 18 onto a surface 20 of a mold 22 . The assembly 10 also includes a forming device 24 comprising a series of forming rollers 26 for pre-forming the pre-preg strip 18 before it is laid in the mold 22 .

[0024] Although in figure 1 Not shown, assembly 10 is typically mounted at the end of a robotic arm or gantry that is configured to move over mold 22 . End effector assembly 10 is traversed by robotic arm or gantry across surface 20 of mold 22 according to a series of pre-programmed instructions. As the end effector 10 moves, the end effector 10 deposits a strip of pre-impregnated fibrous material 18 onto a surface 20 of a mold 22 or onto a previously deposited ply of pr...

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PUM

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Abstract

The invention relates to an improvement related to the composite layup. A composite layup method is described in which strips of fibrous material are deposited progressively on a mould surface. The method involves feeding a strip of fibrous material to a placement device for placing the strip progressively on the mould surface, and imparting a shape to the strip upstream of the placement device. In this way, shape is imparted to the strip prior to the strip reaching the placement device. The shape imparted to the strip corresponds at least partially to a shape of the mould surface. This prevents air from becoming trapped between the strip and the mould surface as the strip is deposited in the mould. The application also describes an end effector assembly suitable for use in the composite layup method.

Description

technical field [0001] The present invention relates to composite lay-up techniques suitable for laying up large composite structures such as modern wind turbine blades. Background technique [0002] In recent years, substantially large composite structures such as blades of modern wind turbines have been produced using manual layup techniques. This involves placing mats or plies of reinforcing fiber material in large moulds, by hand. Several layers of fibrous material are placed in the mould. The underlayment usually includes fiberglass or carbon fibers. After the mat is placed in the mold, resin is supplied to the mold using techniques such as resin transfer molding (RTM) or vacuum assisted resin transfer molding (VARTM). Alternatively, the mat may be pre-impregnated (ie, prepreg) with resin, thereby eliminating the need to supply resin to the mold. Regardless, such cladding typically undergoes a vacuum-assisted and temperature-controlled curing process as well as a ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/38
CPCB29C70/38B29C70/386B29C70/388B29C70/446B29C70/48Y10T156/1795
Inventor 加里·霍洛韦
Owner VESTAS WIND SYST AS