Thermoplastic Wind Turbine Blade Mold Modification
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Solution Overview
Problem
Conventional wind turbine rotor blade molds made of thermoset materials are difficult to repair and modify, leading to time-consuming and costly processes, as well as the need for new molds when new blade parts are developed.
Innovation Solution
A method using thermoplastic materials for rotor blade molds that allows for easy repair and modification through the application of heat, pressure, or chemicals to join additional components, such as recesses or extensions, and the use of fiber-reinforced thermoplastic layers for enhanced bonding and reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If conventional thermoset resin material is used for blade molds, then the mold structure is stable and durable, but the mold becomes difficult to repair and modify, requiring grinding and re-laminating that takes several hours
Solution Approach 1:
The patent changes the material parameter from thermoset resin to thermoplastic material, which fundamentally alters the repair process. Thermoplastic materials can be heated and reshaped multiple times, enabling rapid repair by simply heating and reforming the mold surface rather than grinding and re-laminating, thus dramatically reducing repair time while maintaining structural stability
Solution Approach 2:
The patent employs composite construction by combining thermoplastic material with fiber reinforcement (such as carbon fiber or glass fiber). This composite approach provides both the ease of thermal processing needed for rapid repair and the structural strength required for mold durability, resolving the contradiction between repairability and structural integrity
2Adaptability or versatility
If conventional thermoset molds are used, then the initial mold manufacturing is complete, but any modifications for new blade parts require manufacturing entirely new molds, increasing costs
Solution Approach 1:
By changing the material parameter to thermoplastic, the mold becomes thermally processable and can be easily reshaped or modified by heating and reforming. This eliminates the need to manufacture entirely new molds for new blade parts, as the same mold can be adapted through thermal processing, thereby improving adaptability while maintaining ease of manufacture
Solution Approach 2:
The thermoplastic mold achieves multi-functionality by being capable of producing different blade part designs through thermal modification. A single mold can be adapted to manufacture various blade configurations by heating and reshaping, making the mold universal for multiple blade designs rather than requiring dedicated molds for each design
3Strength
If thermoplastic material with fiber reinforcement is used, then the mold achieves enhanced strength and stiffness, but the material requires controlled cooling to prevent deformation
Solution Approach 1:
The patent uses fiber-reinforced thermoplastic composite materials that provide enhanced strength and stiffness. The fiber reinforcement (carbon fiber, glass fiber, or other fibers) creates a composite structure that achieves the required mechanical properties while the thermoplastic matrix allows for thermal processing. The cooling system complexity is managed by integrating cooling channels into the mold design, which is a standard engineering solution rather than a fundamental complexity issue
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid and cost-effective repair and modification of rotor blade molds, allowing for the addition of mold add-ons without requiring new molds, thus improving versatility and reducing time and expenses.
Implementation Method 1
applying at least one of heat, pressure, or one or more chemicals at an interface of the blade mold addition and the mold so as to join the blade mold addition to the mold
Data Source
AI summary
The present disclosure is directed methods for modifying molds of rotor blades of a wind turbine. In certain embodiments, the blade mold is constructed, at least in part, of a thermoplastic material optionally reinforced with a fiber material. In one embodiment, the method includes identifying at least one blade mold addition for the mold of the rotor blade and positioning the blade mold addition at a predetermined location of the mold of the rotor blade. Further, the blade mold addition is constructed, at least in part, of a thermoplastic material. Thus, the method includes applying at least one of heat, pressure, or one or more chemicals at an interface of the blade mold addition and the mold so as to join the blade mold addition to the mold. In further embodiments, the methods described herein are also directed repairing thermoplastic blade molds.