Method for manufacturing work piece by vacuum assisted resin transfer moulding

A resin transfer molding, vacuum-assisted technology for consistent resin distribution in sustainable manufacturing/processing, end product manufacturing, household components, etc.

Inactive Publication Date: 2012-10-17
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No research and development has been done to solve problems in the fiber reinforced plastics industry

Method used

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  • Method for manufacturing work piece by vacuum assisted resin transfer moulding
  • Method for manufacturing work piece by vacuum assisted resin transfer moulding
  • Method for manufacturing work piece by vacuum assisted resin transfer moulding

Examples

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Embodiment Construction

[0033] will now refer to Figure 1 to Figure 9 Embodiments of the present invention are described.

[0034] figure 1 The rotor blade is diagrammatically shown in plan view on the plane defined by the blade span and the blade chord. The spanwise direction is indicated by reference numeral 30 . figure 1 The rotor blade 1 shown in includes a root portion 3 with a cylindrical profile and a tip 2 . The tip forms the outermost part of the blade. The cylindrical profile of the root part 3 is used to fix the blade to the bearing of the rotor hub. The rotor blade 1 also comprises a so-called shoulder 4 defined as the location of its maximum profile depth, ie the maximum chord length of the blade. An airfoil portion 5 extends between the shoulder 4 and the tip 2, which has an aerodynamic profile. A transition section 7 extends between the shoulder 4 and the cylindrical root section 3 , wherein a transition from the aerodynamic profile of the airfoil section 5 to the cylindrical pr...

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PUM

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Abstract

A method for manufacturing a work piece (1) by vacuum assisted resin transfer moulding is described. The method comprises the steps of placing fibre rovings (13) in a mould of a closed mould system which comprises a mould cavity, placing at least one resin distribution means (14, 17, 18, 25) between the fibre rovings (13), applying vacuum to the closed mould system and injecting resin into the mould cavity.

Description

technical field [0001] The present invention relates to methods for manufacturing workpieces by vacuum assisted resin transfer molding, and more particularly to methods for manufacturing wind turbine rotor blades. It also involves workpieces, such as wind turbine rotor blades. Background technique [0002] Fiber-reinforced plastic compounds are used in various technical products such as automobiles, wind turbine blades, storage tanks, etc. Most products of large size, such as wind turbine blades, are manufactured by placing woven glass fabric conveyed on rollers into one or more moulds. In a common resin injection molding process known as VARTM (Vacuum Assisted Resin Transfer Molding), the mold is closed and a vacuum is applied to the closed mold system. A resin such as polyester, epoxy, vinyl ester or other resins is then injected into the mold cavity to fill the spaces between the fibers within the laminate. [0003] In load-bearing structures, one-way glass cloth is us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/44B29L31/08
CPCB29C70/547B29L2031/082Y02E10/721B29C70/48B29L2031/085Y10T428/249922Y02E10/72Y02P70/50
Inventor E.格罗韦-尼尔森
Owner SIEMENS AG
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