Concentric Bonding Structure for Uniform Adhesive Injection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for bonding concentric elements often result in uneven adhesive distribution and the risk of extruded adhesive beads, which can impair the functionality of components, especially in mechanical and electro-mechanical systems, due to the need for precise alignment and movement during adhesive application.
Innovation Solution
The design incorporates an adhesive void between concentric elements with alpha and beta plugs and void faces, allowing for adhesive injection between the elements without subsequent movement, ensuring a uniform adhesive layer and minimizing the risk of adhesive flow and air bubble entrapment, using an adhesive guide means to direct the adhesive flow effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to bonding faces and elements are pushed together until interference occurs, then the elements can be bonded, but uneven adhesive distribution and extruded adhesive beads occur
Solution Approach 1:
The bonding face is segmented into multiple regions: a first bonding face on the first element, a second bonding face on the second element, and a third bonding face on the second element. This segmentation allows adhesive to be applied to multiple surfaces, creating separate adhesive layers that distribute stress more evenly and prevent extrusion in any single location.
Solution Approach 2:
Different regions of the bonding interface have different properties. The first bonding portion has a first bonding face, while the second bonding portion has both a second bonding face and a third bonding face. This creates local variations in bonding capability, allowing adhesive to be contained in specific zones and preventing uniform extrusion across the entire interface.
2Ease of operation
If elements are moved during adhesive application to achieve alignment, then bonding can occur, but shear stress is introduced and bond strength is reduced
Solution Approach 1:
The elements are pre-aligned using guide features (such as tapered sections, ribs, or positioning protrusions) before adhesive application. This preliminary alignment ensures that the bonding faces are properly positioned in advance, eliminating the need for movement during adhesive curing and preventing shear stress that would weaken the bond.
3Ease of manufacture
If adhesive is applied in a simple linear path, then application is simple, but air bubbles become trapped and bond quality deteriorates
Solution Approach 1:
The adhesive application path follows a curved or spiral trajectory rather than a straight line. This curved path allows adhesive to flow more smoothly across the bonding surface, preventing air bubbles from becoming trapped in linear channels and ensuring complete coverage without voids that would compromise bond reliability.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A component comprising a first concentric element and a second concentric element is disclosed. The first and second concentric elements are positioned relative to each other in the positions in which they are to be bonded together. The first concentric element comprises a first bonding portion (48) with a first bonding face (50), and the second concentric element comprises a second bonding portion (58) with a second bonding face (60), a first passage (62), and a second passage (64). The second bonding portion (58) partially surrounds the first bonding portion (48) and the first and second bonding faces (50, 60) face each other. The first and second bonding faces (50, 60) comprise a first and second void face (56, 61) respectively. Collectively the first and second bonding faces (50, 60) comprise an alpha plug (52) having an alpha plug face, a beta plug (54) having a beta plug face, an alpha bearing face, and a beta bearing face, in which the alpha plug face is in sliding contact with the alpha bearing face and the beta plug face is in sliding contact with the beta baring face, the alpha plug (52) is integral with one of the first or second void faces (56, 61) and the alpha bearing face is integral with the other of the first or second void faces (56, 61), the beta plug (54) is integral with one of the first or second void faces (56, 61) and the beta bearing face is integral with the other of the first or second void faces (56, 61), and the alpha and beta plugs (52, 54) and first and second void faces (56, 61) collectively define a void. The first and second passages (62, 64) each extend through the second concentric element from a mouth which opens onto the void to a mouth in an accessible surface of the second concentric element.