Frangible Adhesive Dispensing Enclosure for Precise Mixing
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Solution Overview
Problem
Existing methods for dispensing two-component adhesives lack convenience and accuracy in mixing the base and hardener components, often resulting in errors due to the difficulty in achieving precise proportions, especially when the mixing ratio is unequal.
Innovation Solution
A compliant exterior wall enclosure with separate volumes for the base and hardener components, separated by a membrane and featuring frangible regions that rupture to facilitate controlled expulsion of the components, ensuring accurate mixing ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate containers with manual mixing are used, then ease of operation is improved, but manufacturing precision deteriorates due to difficulty in achieving precise proportions
Solution Approach 1:
The adhesive system is segmented into two separate compartments within a single enclosure, with the base component and hardener component stored in distinct volumes. This segmentation allows each component to be kept separate until dispensing, preventing premature mixing while ensuring precise proportional delivery through the shared frangible outlet.
Solution Approach 2:
The patent implements a nested structure where the membrane enclosing the hardener component is positioned inside the overall enclosure, with the frangible region penetrating through both the membrane and the enclosure wall. This nested arrangement allows both components to be contained in a compact single unit while maintaining their separation and enabling simultaneous controlled dispensing.
2Ease of operation
If approximate measures are used in side-by-side syringes, then ease of operation is improved, but manufacturing precision deteriorates due to inability to achieve accurate mixing ratios
Solution Approach 1:
The enclosure is pre-configured with specific volume ratios for the base and hardener components during manufacturing. The frangible region is pre-positioned to penetrate the membrane at a location that ensures the correct volumetric proportion of each component is delivered simultaneously. This preliminary configuration eliminates the need for user measurement while maintaining high precision.
Solution Approach 2:
The system performs self-measurement and self-dosing through its engineered geometry. The fixed volumes of the two compartments and the single frangible outlet work together to automatically deliver the correct mixing ratio without requiring external measurement tools or user calculation, making the system both convenient and precise.
3Device complexity
If a single compartment package is used, then device complexity is reduced, but manufacturing precision deteriorates due to inability to maintain component separation
Solution Approach 1:
The membrane providing component separation is strategically positioned only in the region where the hardener component is contained, extending from the enclosure wall toward the frangible region. This localized membrane structure maintains component separation where needed while keeping the overall enclosure design simple and the manufacturing process straightforward.
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
The solution enables precise and convenient dispensing of measured volumes of the adhesive components, reducing errors and ensuring the correct mixing ratio is maintained, which is critical for the curing process and performance of the adhesive.
Implementation Method 1
a frangible region formed in the exterior wall and being operable to rupture to provide at least one outlet in response to an increase in pressure caused by a force applied to the exterior wall
Implementation Method 2
a membrane attached to the exterior wall, the membrane separating the first and second volumes
Data Source
AI summary
A method and apparatus for dispensing an adhesive having a base component and a hardener component that when mixed produce a curable adhesive is disclosed. The apparatus includes a compliant exterior wall enclosing a first volume for containing the base component and a second volume for containing the hardener component, the first and second volumes being separated by a membrane within the exterior wall. The apparatus also includes a frangible region formed in the exterior wall and being operable to rupture to provide at least one outlet in response to an increase in pressure caused by a force applied to the exterior wall, the at least one outlet permitting respective portions of the base component and the hardener component to be expelled to facilitate mixing of the curable adhesive.