Heating elements for repair of molding defects for carbon fiber thermoplastic composites
First Claim
1. A method of repairing a manufacturing defect in a molded polymeric composite structure, the method comprising:
- applying a heating element over a first contoured surface of the molded polymeric composite structure comprising a defect, wherein the heating element defines a second contoured surface complementary with at least a portion of the first contoured surface and the heating element comprises an electrically conductive layer including a fabric and a thermoset polymer; and
heating a portion of the first contoured surface with the heating element, wherein the heating element has a substantially uniform temperature across the second contoured surface to repair the defect, wherein the heating element is molded and retains the second contoured surface prior to the applying.
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Accused Products
Abstract
Methods of repairing a manufacturing defect in a molded polymeric composite structure are provided. A polymeric patch may optionally be disposed over a defect on a first contoured surface of the molded polymeric composite structure having the defect. A heating element that defines a second contoured surface complementary with at least a portion of the first contoured surface is applied over the polymeric patch. The heating element includes an electrically conductive layer that includes a fabric and a thermoset polymer. The polymeric patch is heated with the heating element, where the heating element has a substantially uniform temperature across the second contoured surface so that the polymeric patch fills the defect. Methods of making the customized heating elements and the customized heating elements are also provided.
70 Citations
19 Claims
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1. A method of repairing a manufacturing defect in a molded polymeric composite structure, the method comprising:
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applying a heating element over a first contoured surface of the molded polymeric composite structure comprising a defect, wherein the heating element defines a second contoured surface complementary with at least a portion of the first contoured surface and the heating element comprises an electrically conductive layer including a fabric and a thermoset polymer; and heating a portion of the first contoured surface with the heating element, wherein the heating element has a substantially uniform temperature across the second contoured surface to repair the defect, wherein the heating element is molded and retains the second contoured surface prior to the applying. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of repairing a manufacturing defect in a first contoured surface of a molded polymeric composite structure, the method comprising:
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obtaining a molded heating element having a retained second contoured surface that defines an inverse shape of the first contoured surface over the first contoured surface of the molded polymeric composite structure and that has an electrically conductive layer including a fabric and a thermoset polymer; applying the molded heating element over the defect on the first contoured surface of the molded polymeric composite structure; and applying a substantially uniform temperature across the retained second contoured surface of the molded heating element to heat a portion of the first contoured surface to repair the defect. - View Dependent Claims (17)
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18. A method of repairing a manufacturing defect in a molded polymeric composite structure, the method comprising:
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disposing a fabric in a cavity of a template defining a contoured surface profile that is complementary with at least a portion of a first contoured surface of the molded polymeric composite structure comprising the defect; introducing a liquid precursor of a thermoset polymer into the cavity so that the liquid precursor fills the fabric, wherein at least one of the liquid precursor or the fabric comprises an electrically conductive material; solidifying the liquid precursor to form the thermoset polymer, wherein the thermoset polymer and the fabric together define a heating element defining a second contoured surface complementary with at least a portion of the first contoured surface; removing the heating element from the template, wherein the heating element retains the second contoured surface after the removing; applying the heating element over the first contoured surface of the molded polymeric composite structure comprising the defect; and heating a portion of the first contoured surface with the heating element, wherein the heating element has a substantially uniform temperature across the second contoured surface to repair the defect. - View Dependent Claims (19)
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Specification