Vehicle Tailgate Bridge Wall Bonding Interface
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Solution Overview
Problem
The existing methods for bonding and sealing tailgates, particularly around optical units, face challenges due to the presence of sharp or acute angles, making it difficult for robots to apply glue uniformly and ensuring proper pressure, leading to potential water leakage and discontinuous sealing.
Innovation Solution
Incorporating a bridge wall on the inner face of the outer panel to create a flatter and smoother bonding interface, allowing easier access and application of glue by robots, and ensuring a continuous seal path that can withstand various tailgate styles and angles, thus enhancing waterproofness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a robot applies glue on the outer panel with an angle normal to the inside face to create a seal path, then the seal path can be correctly formed, but it becomes almost impossible for a single-axis robot to apply glue in corners with right or sharp or acute angles around the optical units
Solution Approach 1:
The patent introduces a bridge wall that protrudes from the inner face of the outer panel, creating a new dimensional feature that transforms the bonding interface geometry. This bridge wall provides a flat bonding surface that extends into the corner regions, allowing the robot to apply glue at a normal angle while still achieving proper sealing in previously inaccessible acute-angled corners. The bridge wall essentially adds a third dimension (protrusion depth) to the bonding interface, resolving the contradiction between seal path correctness and robot accessibility.
2Shape
If the housing upper walls are oriented almost parallel or in an undercut position with respect to the main bonding direction, then the tailgate can achieve its desired style shape, but it does not allow easy fitting and makes it difficult or impossible to apply proper pressure for assembling the two panels
Solution Approach 1:
The bridge wall is pre-formed as an integral part of the outer panel during its manufacturing process. This preliminary action creates a built-in bonding aid that protrudes toward the inner panel, establishing a flat bonding interface before the assembly operation begins. The bridge wall's presence eliminates the need for complex assembly techniques or additional tools, allowing standard bonding processes to achieve proper pressure distribution and alignment even with undercut housing walls.
3Productivity
If insufficient or no pressure is applied on the glue bead between the two panels, then the assembly process is simpler, but it leads to a discontinuous sealing and water leakage inside the tailgate
Solution Approach 1:
The bridge wall structure is designed to self-align and self-compress the inner and outer panels during the bonding process. The protruding bridge wall makes contact with the inner panel first, establishing proper alignment and distributing pressure evenly across the bonding interface. This self-service mechanism ensures continuous sealing and prevents water leakage without requiring complex pressure control systems or multiple assembly steps, thereby maintaining productivity while ensuring reliability.
Data Source
AI summary
A tailgate for a vehicle including an inner panel and an outer panel. The outer panel includes an appearance wall and an edge wall adjacent to the appearance wall and taking part in delimiting a housing for receiving an optical unit. The outer panel further includes a bridge wall, located on the inside face of the outer panel, forming a bridge between the edge wall and the appearance wall and serving as a part of a bonding interface between the outer panel and the inner panel. A process for molding the outer panel for the tailgate for a vehicle, wherein a movable slider is built and used in a mold to create a naturally non-demoldable hollow cavity delimited by the appearance wall, the edge wall and the bridge wall.