Tapered Inlet Design for Adhesive Overflow Control
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Solution Overview
Problem
In mass-produced products, the variation in adhesive amount and space tolerance between components leads to adhesive overflow when using a fixed amount of adhesive, resulting in unattractive product appearances.
Innovation Solution
A product design featuring a second component with an inlet that has a tapered portion narrowing from the exterior to the interior space, allowing for controlled adhesive injection and reducing overflow risks, even with excessive adhesive supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed amount of adhesive is supplied from an adhesive dispenser, then mass production efficiency is improved, but adhesive overflow occurs due to variations in adhesive amount and space tolerance
Solution Approach 1:
The inlet is designed with a tapered portion that changes the geometric parameters of the adhesive flow path. The cross-sectional area of the inlet gradually decreases from the exterior space toward the interior space, transforming the adhesive flow from a state prone to overflow to a state that is contained within the inlet, thereby accommodating variations in adhesive supply amount
Solution Approach 2:
The tapered portion of the inlet acts as a pre-designed buffer zone that can accommodate excess adhesive before it reaches the exterior space. This structural cushioning is built into the design beforehand, preventing overflow even when adhesive supply exceeds the exact required amount due to dispensing variations
2Reliability
If the supplied amount of adhesive is controlled to fill the space completely, then component fixation reliability is improved, but adhesive overflows from the inlet to the exterior due to excessive adhesive supply
Solution Approach 1:
The tapered portion modifies the flow parameters of the adhesive by gradually reducing the cross-sectional area. This geometric parameter change creates a flow restriction that prevents excess adhesive from reaching the exterior, while still allowing sufficient adhesive to fill the interior space for reliable fixation
Solution Approach 2:
The tapered portion of the inlet serves as an intermediary structure between the adhesive dispenser and the exterior space. It mediates the adhesive flow by providing a transition zone that captures excess adhesive, preventing it from reaching the exterior while maintaining the filling function
3Ease of manufacture
If the inlet has a constant cross-section, then manufacturing simplicity is improved, but excess adhesive cannot be accommodated leading to overflow
Solution Approach 1:
The inlet cross-sectional area parameter is changed along the length of the inlet, creating a tapered geometry. This parameter variation is simple to implement in manufacturing (e.g., through molding or machining) and effectively accommodates excess adhesive without requiring complex structures
Data Source
AI summary
A product includes a first component, a second component and an adhesive. The adhesive fills an interior space that is surrounded by the first component and the second component. The second component comprising an inlet that communicates between an exterior space of the second component and the interior space so as to enable the adhesive to be injected into the interior space. The inlet comprising a tapered portion that narrows from the exterior space towards the interior space.