Panel Insert Assembly With Piston-Driven Adhesive Bonding
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Solution Overview
Problem
Existing insert systems for panels with cellular solid core structures face challenges such as the need for special tools to maintain positioning during adhesive curing, adhesive flow to non-strength contributing areas, and potential structural integrity issues due to heat application or excess adhesive weight.
Innovation Solution
An insert system with a base and outer skirt forming a chamber to receive adhesive, featuring a piston that discharges adhesive into the core structure, ensuring large-area bonding and mechanical augmentation, and using guiding means for precise positioning without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat is applied to melt thermoplastic material for bonding the insert, then bonding between insert and panel is achieved, but structural integrity of the panel may be affected and time and equipment costs increase
Solution Approach 1:
The patent replaces the thermal bonding system with a mechanical bonding system. Instead of using heat to melt thermoplastic material, the invention uses a mechanically expandable bonding agent that expands upon contact with moisture or chemical activation to fill and bond the insert to the panel, eliminating the need for external heating equipment and avoiding thermal damage to the panel structure.
Solution Approach 2:
The patent changes the bonding mechanism from thermal-based to chemical/moisture-based activation. The bonding agent transitions from a solid or semi-solid state to an expanded foam state through chemical reaction with moisture or activation chemicals, rather than through thermal melting, fundamentally changing the physical parameters involved in the bonding process.
2Reliability
If expandable bonding agent is used to fill all ruptured cells, then complete bonding coverage is achieved, but excess weight is added to the insert
Solution Approach 1:
The patent applies partial action by designing the bonding agent to expand only to the extent necessary to fill the ruptured cells and create adequate bonding, rather than over-expanding to fill all possible spaces. The expandable agent is formulated with controlled expansion characteristics that stop when the bonding function is achieved, avoiding unnecessary weight addition.
3Strength
If adhesive is applied to the insert for mounting, then bonding to the panel is achieved, but special tools are needed to maintain positioning during curing
Solution Approach 1:
The patent applies preliminary action by pre-forming the insert with an integrated mounting structure that includes protrusions or features designed to engage with corresponding features in the panel. This preliminary structural preparation eliminates the need for external positioning tools during curing, as the insert self-aligns and maintains position through its pre-designed mechanical engagement features.
4Reliability
If adhesive is applied to ensure proper embedding, then bonding is achieved, but contamination of the panel surface with adhesive may occur
Solution Approach 1:
The patent extracts the adhesive application function from the insert mounting process. Instead of applying adhesive to the insert or panel surfaces, the invention uses a mechanical expansion and engagement system where the expandable bonding agent is contained within the insert structure and activates in a controlled manner, eliminating the risk of adhesive contamination on panel surfaces while maintaining reliable bonding.
Data Source
AI summary
The invention is directed to an insert system comprising an insert with a base and an outer skirt extending from the base, thereby forming a chamber. The outer skirt is provided with a first inner skirt surface and a first outer skirt surface. The insert system further comprises a panel with a core structure and a first cover sheet that at least partially covers the core structure. The first cover sheet defines a first outer panel surface and has an opening. At least one piston is arranged in the opening and beneath the first outer panel surface. According to the invention the piston during mounting of the insert sweeps into the chamber to discharge an adhesive agent from the chamber into the core structure via at least one pathway.