Diversion method for composite vacuum perfusion molding process

A composite material and vacuum infusion technology, which is applied in the field of composite material molding technology, can solve the problems of liquid resin loss, long molding time, and low production efficiency, and achieve the effects of improving compression resistance, shortening molding time, and improving production efficiency

Active Publication Date: 2013-10-30
LUOYANG SUNRUI WIND TURBINE BLADE
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] 2. The speed of liquid resin on the surface of the laminate structure is almost completely lost, resulting in extremely slow dispersion speed on the surface, and the flow speed of liquid resin is greatly reduced
The impact: longer molding times, lower productivity, and increased risk of the liquid resin not fully saturating the dry layup during infusion
[0008] 3. The gas remaining in the liquid resin and the dry layup structure cannot be removed through the diversion medium. At the same time, the downwardly penetrating liquid resin and the gas in the bottom layup structure float to the upper layer of the layup, so that all these gases are collected in the diversion medium The upper layer of the laminate in the partition area reduces the tensile, bending, shearing and compression resistance of the product, reduces the mechanical properties of the product and affects the service life, chemical corrosion resistance and weather resistance of the product
[0009] Therefore, it is necessary to design the isolation area of ​​the diversion medium in the vacuum infusion molding process, but at the same time it will bring more negative problems

Method used

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Examples

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Embodiment 1

[0020] Application example of vacuum infusion molding of large composite wind power blade with a length of 50m and a width of 5m.

[0021] The 50m wind turbine blade is divided into upper and lower shells. When forming, the upper and lower shells are respectively molded by vacuum infusion. After curing, the upper and lower shells are bonded together with an adhesive. The layering method of the upper and lower shells is exactly the same as the layering structure, any of which can be called a half shell.

[0022] When the half shell is formed, three dry fiber layers are laid on the full surface of the half shell mold from 10m to 50m along the length direction, and the composite material prefabricated from unidirectional glass fiber is laid at 10m-50m along the length direction. The main beam is located at the center of the width direction of the forming mold. The honeycomb sandwich material with the same height as the main beam is laid on both sides of the main beam, and then 3 layer...

Embodiment 2

[0025] An application example of vacuum infusion molding of a large composite wind power blade with a length of 50m and a width of 5m.

[0026] The 50m wind turbine blade is divided into upper and lower shells. When forming, the upper and lower shells are respectively molded by vacuum infusion. After curing, the upper and lower shells are bonded together with an adhesive. The layering method of the upper and lower shells is exactly the same as the layering structure, any of which can be called a half shell.

[0027] When the half shell is formed, 100 dry fiber layers are laid on the entire surface of the lower shell from 0 m to 10 m in the length direction of the molding die.

[0028] Then, two diversion media are laid on the upper surface of the dry paving layer along the width direction. This diversion medium is composed of a spatial net-like fabric with a certain thickness, and its function is to quickly disperse the liquid resin into these spatial net-like structures under vacuu...

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Abstract

The invention belongs to the field of composite molding processes and mainly provides a diversion method for a composite vacuum perfusion molding process. The diversion method comprises the steps of paving diversion mediums (5) on the upper surface of a dry fiber paving layer, wherein the intervals among the diversion mediums located on the upper surface of the dry fiber paving layer form a diversion medium partition area (8); overlapping a diversion bridge (9) between the adjacent diversion mediums (5) with the intervals, wherein the adjacent diversion mediums (5) with the intervals are communicated by the diversion bridge; and cooperating the diversion bridge (9) overlapped between the adjacent diversion mediums (5) with the intervals with the diversion medium partition area (8) formed by the intervals among the diversion mediums so as to control the dispersion speed of liquid resin on the upper layer of the paving layer and guarantee the permeation and dispersion speed of the liquid resin in a direction perpendicular to the paving layer which is the bottom layer, wherein the diversion bridge overlapped between the adjacent diversion mediums with the intervals is composed of the diversion mediums (5).

Description

Technical field [0001] The invention belongs to the technical field of composite material molding technology, and mainly proposes a flow diversion method for composite material vacuum infusion molding technology. Background technique [0002] The principle of the vacuum infusion molding process is: dry fiber layup is carried out in the composite material mold, the diversion medium is laid on the upper surface of the dry fiber layup, and then these dry plies and diversion medium are combined with the mold to establish a vacuum sealing system, and finally Under the vacuum pressure, the liquid resin completely infiltrates the layer through the dispersion of the diversion medium. [0003] The diversion medium is a space mesh fabric with a certain thickness. The liquid resin is quickly dispersed into these space mesh structures under vacuum pressure to achieve penetration of the surface and bottom layer of the dry fiber layer and pass through the space of the diversion medium. The net ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34
Inventor 林明黎华史俊虎
Owner LUOYANG SUNRUI WIND TURBINE BLADE
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