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Hybrid Nonwoven Composite Parts

A composite part, composite fiber technology, used in the field of thermoforming parts

Active Publication Date: 2021-11-23
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The subject matter of the present application has been developed in response to the prior art and in particular to the problems and disadvantages associated with conventional methods that have not been fully addressed by the currently available technology

Method used

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  • Hybrid Nonwoven Composite Parts
  • Hybrid Nonwoven Composite Parts
  • Hybrid Nonwoven Composite Parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0068] Clause 1. A method of forming a composite part, the method comprising:

[0069] heating an unconsolidated mat comprising a first thermoplastic material, a second thermoplastic material and reinforcing fibers to a first temperature, wherein the first thermoplastic material comprises a first melting temperature, wherein:

[0070] the second thermoplastic material includes a second melting temperature greater than the first melting temperature; and

[0071] a first temperature greater than said second melting temperature;

[0072] When the unconsolidated mat is heated, the unconsolidated mat is compressed into a composite fiber reinforced consolidated sheet;

[0073] reheating the composite fiber reinforced consolidated sheet to a second temperature, wherein the second temperature is greater than the first melting temperature and less than the second melting temperature; and

[0074] When the composite fiber reinforced consolidated sheet is reheated, the composite fiber ...

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Abstract

The name of the invention is Hybrid Nonwoven Composite Components. Methods of forming composite parts are disclosed herein. The method includes heating an unconsolidated mat including a first thermoplastic material, a second thermoplastic material, and reinforcing fibers to a first temperature. The first thermoplastic material includes a first melting temperature and the second thermoplastic material includes a second melting temperature greater than the first melting temperature. The first temperature is greater than the second melting temperature. The method involves compressing the unconsolidated mat into a composite fiber reinforced consolidated sheet when heated. The method includes reheating the composite fiber reinforced consolidated sheet to a second temperature, wherein the second temperature is greater than the first melting temperature and lower than the second melting temperature, and upon reheating, the composite fiber reinforced consolidated sheet forms desired shape.

Description

technical field [0001] The present disclosure relates generally to thermoformed parts, and more particularly to forming composite parts from first and second thermoplastic materials having different melting temperatures. Background technique [0002] Forming the part from the consolidated mat made from blended reinforcing fibers and thermoplastic filaments includes heating the mat to the melting temperature of the thermoplastic filaments. However, mats comprising thermoplastic filaments have a tendency to expand and swell during the heating phase preceding the forming phase. This expansion and swelling can make closing of the part forming mold difficult or even impossible. Additionally, expansion and bulking of the pad can result in insufficient pressure to form the part. Compensating for insufficient pressure by increasing the pressure applied to the part may increase the risk of core collapse of the part. Contents of the invention [0003] The subject matter of the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/06B29C70/40B29C70/42
CPCB29C70/06B29C70/40B29C70/42B29C70/003B29C70/465B29C70/0035B29C70/18B29K2071/00B29K2307/04B29K2105/0863B29K2081/04
Inventor A·奥格莱
Owner THE BOEING CO
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