Fluororesin Molded Article Inspection Using OCT for Internal Defects
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Solution Overview
Problem
Existing methods for inspecting molded articles made from fluororesin lack a non-destructive means to evaluate their internal conditions effectively, particularly for high fluorine content articles, which can lead to defects like delamination and cracking.
Innovation Solution
Employing optical coherence tomography (OCT) to image molded articles with a fluorine content of 30% by mass or more, allowing for non-destructive inspection of internal conditions such as cracking and delamination, using specific imaging conditions and adjustments like incident angle and light intensity to enhance signal clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional inspection methods are used for molded articles with high fluorine content, then the inspection process is simple, but the internal conditions cannot be effectively detected leading to quality control issues
Solution Approach 1:
The patent replaces conventional mechanical or electrical inspection methods with optical coherence tomography (OCT), an optical imaging technique. This substitution enables non-destructive detection of internal conditions in fluororesin molded articles by using optical waves to penetrate and image the material's internal structure, thereby improving measurement precision without requiring complex mechanical disruption or destructive testing procedures.
Solution Approach 2:
The patent utilizes the specific optical parameters of fluororesin materials, particularly their interaction with optical waves at defined wavelengths. By adjusting optical parameters such as wavelength selection and coherence length, the OCT system achieves optimal penetration and imaging of the fluororesin's internal structure, enabling detection of defects like voids and delamination without damaging the material.
2Reliability
If non-destructive inspection methods are implemented, then the molded articles are not damaged, but the ability to detect internal defects is limited
Solution Approach 1:
The patent employs optical coherence tomography, an optical rather than mechanical inspection method, to detect internal defects non-destructively. Optical waves can penetrate the fluororesin material and provide detailed imaging of internal conditions including voids, delamination, and other defects, achieving both non-destructive testing and reliable defect detection simultaneously.
Solution Approach 2:
The patent uses optical waves as an intermediary medium to detect internal defects in the fluororesin molded articles. The optical waves interact with the material's internal structure through refraction, reflection, and scattering, providing a non-contact means to visualize internal conditions without physical contact or damage to the inspected articles.
3Productivity
If traditional inspection techniques are used, then the equipment is simple, but production line productivity is reduced due to quality control issues
Solution Approach 1:
The patent replaces time-consuming conventional inspection methods with optical coherence tomography, which provides rapid non-destructive imaging of internal conditions. This substitution enables quick detection of defects without requiring complex preparation or destructive testing procedures, thereby reducing inspection time and maintaining production line productivity while improving quality control reliability.
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 high-speed, non-destructive inspection of molded articles, improving quality reliability and productivity by identifying defects without disrupting the production line, facilitating sorting of good and defective products.
Implementation Method 1
imaging the molded article by optical coherence tomography
Implementation Method 2
adjusting the incident angle of light
Data Source
AI summary
A method for inspecting a molded article, the method enabling non-destructive inspection of an internal condition of a molded article containing fluorine, and a method for producing a molded article including the inspection method. The method for inspecting a molded article includes a step (A1) of inspecting an internal condition of a molded article having a fluorine content of 30% by mass or more based on image data obtained by imaging the molded article by optical coherence tomography.