Vehicular Resin Glass Shield Portion Hides Coating Distortion
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Solution Overview
Problem
Vehicular resin glass used in sunroofs often experiences distortion during injection molding, leading to interference fringes and reduced visual comfort due to the heat ray reflection coating being affected by pressure and temperature, which compromises its appearance.
Innovation Solution
A vehicular resin glass design that includes a heat ray reflection coating, a resin glass substrate, a frame portion, and a shield portion extending from the circumferential edge of the coating over the inner end of the frame, where the shield portion is formed to prevent light from reaching distorted areas and improve appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding is used to manufacture resin glass with frame portion, then manufacturing efficiency and productivity are improved, but distortion occurs in the heat ray reflection coating due to pressure and temperature, causing interference fringes and deteriorating visual comfort
Solution Approach 1:
The patent divides the glass assembly into distinct functional regions: a central transparent region for visual comfort and a peripheral shield portion for distortion management. The shield portion is specifically positioned at the circumferential edge where distortion occurs during injection molding, segmenting the optical function from the structural function to prevent interference fringes from affecting the visual field.
Solution Approach 2:
The patent converts the harmful distortion and interference fringes that inevitably occur during injection molding into a beneficial aesthetic feature. By strategically positioning the shield portion to cover the distorted circumferential edge, the harmful distortion is hidden, and the shield portion itself becomes a design element that improves overall appearance while maintaining manufacturing efficiency.
2Manufacturing precision
If the shield portion is added to cover distorted areas, then visual comfort and appearance are improved, but device complexity and manufacturing steps increase
Solution Approach 1:
The patent merges the shield portion with the heat ray reflection coating as an integrated laminated structure. The shield portion is formed as part of the coating layer itself rather than as a separate component, allowing it to be manufactured simultaneously with the coating through the same injection molding process. This integration reduces assembly steps and overall device complexity while maintaining the function of hiding distortion.
Solution Approach 2:
The shield portion serves multiple functions simultaneously: it acts as a heat ray reflection coating, provides structural support at the circumferential edge, and hides distortion and interference fringes. This multi-functionality reduces the need for additional components and simplifies the overall device structure while achieving multiple objectives.
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
The shield portion effectively hides any distortion in the heat ray reflection coating, enhancing the visual comfort and appearance of the vehicular resin glass by preventing interference fringes from being visible.
Implementation Method 1
visible light is transmitted and ultraviolet rays and infrared rays are reflected by the laminated coating
Implementation Method 2
high-refractive-index thin coatings and low-refractive-index thin coatings are alternately laminated
Data Source
AI summary
Vehicular resin glass includes: a heat ray reflection coating; a resin glass substrate that covers the heat ray reflection coating; a frame portion that covers a circumferential edge portion of the heat ray reflection coating; and a shield portion that is provided between the resin glass substrate and the heat ray reflection coating and extends from the circumferential edge portion of the heat ray reflection coating over an inner circumferential end of the frame portion.