Adhesive Bonding of Elongated Parts in Closed-End Cavities
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Solution Overview
Problem
Traditional methods for bonding elongated objects into cavities result in adhesive wastage and poor bonding strength due to blocked adhesive during insertion, leading to increased manufacturing costs and weak bonds.
Innovation Solution
A method and apparatus that calculate and supply the exact amount of adhesive into the cavity, ensuring it collects at the closed end, allowing efficient insertion and even distribution between the object and cavity, maximizing adhesive use and bonding durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If adhesive is applied onto the outer surface of the elongated object before insertion, then the adhesive can be dispensed onto the object, but most of the adhesive will be blocked by the exposed end face of the cavity and cannot enter the gap, resulting in adhesive waste and insufficient bonding
Solution Approach 1:
Instead of applying adhesive to the elongated object's outer surface and inserting it into the cavity (traditional approach), the patent inverts the process by first placing the elongated object into the cavity and then applying adhesive to the outer surface of the object. This inversion ensures that adhesive applied afterward can properly enter the gap between the object and cavity wall without being blocked by the cavity's exposed end face, thereby eliminating adhesive waste and ensuring uniform distribution for strong bonding.
2Strength
If adhesive is applied onto the outer surface of the elongated object before insertion, then the adhesive can be dispensed, but the adhesive will not be dispensed evenly in the gap and air bubbles will remain, causing weak bonding strength
Solution Approach 1:
The patent applies adhesive to the elongated object's outer surface after the object has been inserted into the cavity, rather than before insertion. This timing inversion allows the adhesive to flow directly into the gap between the object and cavity wall without being blocked, ensuring even distribution and complete filling of the gap. This eliminates air bubbles and voids, resulting in uniform adhesive layers and strong bonding strength.
3Ease of manufacture
If adhesive is applied onto the outer surface of the elongated object before insertion, then the bonding process can proceed, but the blocked adhesive must be thrown away as waste, causing significant increase in manufacturing costs
Solution Approach 1:
The patent inverts the traditional sequence by inserting the elongated object into the cavity first and then applying adhesive to the object's outer surface. This simple sequence inversion eliminates the problem of adhesive being blocked during insertion, ensuring that all applied adhesive enters the gap and is utilized effectively. This eliminates adhesive waste without complicating the manufacturing process, maintaining ease of manufacture while reducing costs.
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
Ensures secure bonding with minimal adhesive waste and improved durability by ensuring even adhesive distribution between the objects, reducing voids and enhancing the bonding strength.
Implementation Method 1
supplying the determined amount of liquid adhesive into the cavity in such a way that the supplied liquid adhesive is collected at the closed end
Implementation Method 2
curing the liquid adhesive
Data Source
AI summary
The present application discloses a method and an apparatus for bonding a first object with a second object, the first object being elongated, the second object being defined with a cavity configured to receive at least a length of the first object, the cavity having a receiving capacity which is slightly greater than a volume of the first object to be inserted into the cavity, and the cavity being configured to include a closed end and an opposite open end. The method comprising: determining an amount of liquid adhesive to be supplied into the cavity on the basis of the difference between the receiving capacity of the cavity and the volume of the first object to be inserted into the cavity; placing the second object in such a way that the closed end is on bottom and the open end is on top; supplying the determined amount of liquid adhesive into the cavity in such a way that the supplied liquid adhesive is collected at the closed end; inserting the first object into the cavity via the open end in such a way that one end of the first object approaches or contacts the closed end; and curing the liquid adhesive.