Thin Plastic Body Panel Structure for Lightweight Vehicle Exteriors
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Solution Overview
Problem
Existing motor vehicle body panels made of plastic face challenges in reducing weight without compromising mechanical performance and appearance, as excessive thickness or density reduction leads to defects and production issues in injection molding.
Innovation Solution
A motor vehicle body panel design featuring a thin plastic covering attached to a plastic support, allowing for significant thickness reduction while maintaining mechanical strength, achieved through the use of a lightweight covering with elastic deformation capabilities and decorative designs, attached via welding or adhesive bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the thickness of the body panel is reduced to save weight, then weight is reduced, but mechanical strength and appearance quality deteriorate
Solution Approach 1:
The body panel is segmented into two distinct parts: a thin covering (0.1-1.5mm) and a separate support structure. The covering provides the outer surface and aesthetic appearance, while the support provides the necessary mechanical strength. This segmentation allows each component to be optimized independently for its specific function.
Solution Approach 2:
The body panel uses a composite structure combining a plastic covering with a plastic support framework. This composite design enables the thin covering to maintain appearance quality while the support structure provides the required mechanical strength, achieving weight reduction without compromising performance.
2Weight of moving object
If the density of the plastic material is reduced to save weight, then weight is reduced, but mechanical performance and production quality deteriorate
Solution Approach 1:
The body panel is divided into a covering and a support structure, allowing the support to use higher density, higher strength plastic material while the covering uses lighter material. This segmentation enables optimized material selection for each component's specific requirements.
Solution Approach 2:
Different parts of the body panel have different material properties: the covering uses lighter plastic material for weight reduction, while the support structure uses denser, stronger plastic material to ensure mechanical performance and production quality.
3Weight of moving object
If recesses are created by molding to reduce mass, then weight is reduced, but appearance defects occur
Solution Approach 1:
The body panel is segmented into a separate covering and support structure, eliminating the need for molded recesses in a single piece. The covering can be a smooth, continuous surface without injection molding defects, while weight reduction is achieved through the overall thin-walled design and separate support structure.
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
This design achieves a weight reduction of up to 50% compared to conventional injection-molded panels while maintaining mechanical strength and aesthetic quality, with the option for easy replacement and recycling.
Implementation Method 1
the covering is configured so as to allow elastic deformation in tension in an extension plane of the covering of between 1% and 50%, preferably between 3% and 10%
Implementation Method 2
the covering is attached to at least one support made of plastic material forming at least part of a frame of the body panel
Implementation Method 3
the covering is rigidly attached to the support, for example by welding, by adhesive bonding, by riveting or by overmolding the covering on the support
Data Source
AI summary
The present disclosure relates to a motor vehicle body panel, including at least one covering with a thickness of between 0.1 and 1.5 millimeter, preferably between 0.3 and 0.7 millimeters, forming a main body of the body panel, the covering being attached to at least one plastic support forming at least part of a frame of the body panel.