Plastic Body Panel Flap Cutting for Flush Gap Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing vehicle body parts with movable flaps are complex and costly, struggling to achieve flushness and gap management between plastic panels and flaps to meet manufacturer specifications.
Innovation Solution
A method involving single injection molding and laser cutting of a plastic panel to create a flap that is flush with the panel, using a non-vertical cutting plane and optimizing thickness and angle to ensure seamless integration without additional tools, while maintaining rounded edges for aesthetic and decorating purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic panels and flaps are produced as two separate parts, then manufacturing flexibility is maintained, but production costs increase and gap management becomes complex
Solution Approach 1:
The patent merges the panel and flap into a single molded piece, eliminating the need for separate manufacturing processes and assembly operations. This integration directly reduces production costs and eliminates gap management issues between separate components, while maintaining manufacturing flexibility through the molding process.
2Device complexity
If flaps are cut out from molded plastic panels, then separate injection tools are eliminated, but flushness management between edges becomes complicated
Solution Approach 1:
The patent introduces a grooved dimension into the panel surface, creating a recessed area where the flap is positioned. This dimensional change allows the flap edges to align perfectly with the panel surface, achieving precise flushness. The groove depth is specifically designed to accommodate the flap thickness, ensuring that the outer surfaces of the panel and flap are coplanar when the flap is closed.
3Ease of manufacture
If wide gaps are used between panel and flap, then manufacturing tolerance is easier to manage, but visual appearance and flushness specifications are not met
Solution Approach 1:
The patent applies local quality by creating a specific grooved region on the panel surface where the flap is positioned. This localized structural modification allows for precise control of the gap (or lack thereof) specifically at the flap-panel interface, while the rest of the panel maintains its standard manufacturing tolerances. The groove ensures that the flap edges are flush with the panel surface, meeting visual appearance specifications without compromising overall manufacturing ease.
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 approach reduces production costs and ensures optimal flushness and gap reduction between the panel and flap, meeting manufacturer specifications and enhancing the visual appearance and decorating process.
Implementation Method 1
laser cutting of the plastic panel in a non-vertical cutting plane locally with respect to the first face
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Method for producing a plastic body part (1) for motor vehicles comprising the following steps: - molding of a plastic panel (2) having a first face (21) and a second face (22) opposed to the first face (21), the plastic panel (2) comprising a projecting portion (3) of the first face (21), - laser cutting of the plastic panel (2) in a non-vertical cutting plane locally with respect to the first face (21), forming an opening (10) and a flap (30).