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Blade forming method and blade

A molding method and blade technology, which can be applied to household appliances, other household appliances, household components, etc., can solve the problems of restricting the production efficiency of blades, length, usually 1.5 hours to 2 hours, or even longer, and cost increase, etc., to achieve The effect of shortening the pouring time, reducing material costs and improving production efficiency

Pending Publication Date: 2022-06-24
JIANGSU GOLDWIND SCI & TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

Since the viscosity of the epoxy resin at room temperature is about 200CPS-300CPS, the perfusion time of the large thickness part is longer, generally takes 1.5 hours to 2 hours, or even longer
The post-curing period of the epoxy resin system is generally 6 hours to 7 hours at 70°C, and the time it takes to pour and cure a blade with epoxy resin generally takes up to 24 hours to 48 hours, which seriously restricts the production efficiency of the blade
[0003] In addition, in recent years, with the continuous price increase of epichlorohydrin, the raw material of matrix epoxy resin, the cost of epoxy resin system for blade perfusion has increased significantly

Method used

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  • Blade forming method and blade
  • Blade forming method and blade

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Embodiment Construction

[0029] Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present invention by way of illustration of the present invention. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention; and, the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0030] The orientation words appearing...

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Abstract

The invention relates to a blade forming method and a blade, and the blade forming method comprises the following steps: laying a laying material on a mold, and connecting the mold to vacuumizing equipment through an exhaust pipe provided with a first control valve; laying a vacuum infusion system on the laying material, wherein the vacuum infusion system comprises a glue inlet pipe provided with a second control valve; a first control valve is opened, and the vacuum infusion system is vacuumized and subjected to pressure maintaining; dehumidification treatment is conducted on the interior of the vacuum infusion system; detecting the internal humidity of the vacuum infusion system; and when the humidity in the vacuum infusion system meets the requirement, the second control valve is opened, and the polyurethane resin system is injected into the vacuum infusion system through the glue inlet pipe. According to the method, a polyurethane resin system with relatively low viscosity at room temperature is adopted for pouring and forming the blade, so that the pouring time of the blade can be shortened, the production efficiency of the blade can be improved, and the material cost of the blade can be reduced.

Description

technical field [0001] The present invention relates to the technical field of wind power generation, in particular to a method for forming a blade and a blade. Background technique [0002] At present, the shell of the wind turbine blade is mainly made of two-component epoxy resin system infused with glass fiber fabric and cured by vacuum pressure. Epoxy resin is a polymer containing more than two epoxy groups on the molecule, which is commonly formed by condensation polymerization of bisphenol A, epichlorohydrin, polyol, etc. Epoxy resin systems for blade infusion include bulk epoxy resins and amine curing agents. Since the viscosity of epoxy resin at room temperature is about 200CPS-300CPS, the perfusion time of large thickness parts is longer, generally 1.5 hours to 2 hours, or even longer. The post-curing cycle of the epoxy resin system is generally 6 hours to 7 hours at 70 °C, and the time required to infuse and cure a blade with epoxy resin is generally 24 hours to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29L31/08
CPCB29C70/36B29L2031/085
Inventor 刘宝锋李阳阳李富
Owner JIANGSU GOLDWIND SCI & TECH CO LTD
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