Abstract: With the advent of the era of the same price of wind power and thermal power, the capacity and sweeping area of wind turbines have been increasing, and the light-weight & large-scale wind turbine blades are becoming more and more popular which poses a higher challenge to the resin infusion moulding (RIM) technology. There is a big gap in labor, quality, cost, energy conservation and emission reduction of conventional RIM technology. The larger the blade, the higher the quality risk and cost, therefore blade manufacturing plants urgently need a new RIM technology suitable for light-weight & large-scale blades to support quality improvement, efficiency increase and cost reduction. This article introduces the application of integrated online RIM technology in moulding process of large wind turbine blades, and compares its advantages with conventional RIM technology. Evidence proves the higher application value of this technology in combination with the conventional RIM technology. Production practice shows that the integrated on-line RIM technology with auto-mixing function reduces the staffing by 33%, reduces the single-blade infusion defect quantity by 80%, and reduces the single-blade resin consumption by 60 kg, which has higher engineering application value.

Key words: wind turbine blades, integrated online vacuum infusion technology, blade molding process, composites