Applicator Tip Porous Filter Bubble Control
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Solution Overview
Problem
Existing hand-held dual chambered applicators for dispensing liquid and viscous fluid compositions face issues such as the passage of shards, difficulty in controlling flow rate, uneven activation of two-part curable compositions, and the introduction of bubbles, especially with viscous materials.
Innovation Solution
The design incorporates a cylindrical filter element with a smaller diameter than the applicator body lumen to catch shards, a conical passageway in the applicator tip for controlled flow, and bubble-breaking chambers to prevent or reduce bubble formation, along with a tip pin for secure storage and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter element is used to prevent shard passage, then reliability is improved, but device complexity increases
Solution Approach 1:
The applicator tip is designed to serve multiple functions: it acts as both the dispensing nozzle and the filter element. The tip's porous structure filters shards while simultaneously controlling fluid flow and enabling dispensing, eliminating the need for a separate filter component.
Solution Approach 2:
The filter function is merged with the applicator tip by making the tip itself porous. This integration combines the filtering, dispensing, and flow control functions into a single component, reducing overall device complexity while maintaining reliability.
2Productivity
If pressure is increased to force contents through the filter, then productivity is improved, but object-generated harmful factors worsen
Solution Approach 1:
The porous structure of the applicator tip is designed with specific pore sizes and distributions that allow fluid to pass through at controlled rates without requiring high pressure. This parameter optimization enables adequate dispensing speed while avoiding the bubble formation that occurs with excessive pressure.
3Device complexity
If the second component is placed in the applicator tip, then device complexity is reduced, but object-affected harmful factors worsen
Solution Approach 1:
The applicator is divided into two separate chambers: one for the first component and one for the second component. This segmentation ensures that each component remains isolated until dispensing, preventing premature activation while allowing both components to be delivered simultaneously to the substrate for proper mixing and activation.
4Ease of operation
If a porous applicator tip is used, then ease of operation is improved, but object-generated harmful factors worsen
Solution Approach 1:
The applicator is designed as a disposable unit that is discarded after a single use. This eliminates the problem of shard saturation affecting future uses, as each new applicator starts with a clean porous tip ready for filtering shards from the fresh composition.
Data Source
AI summary
An improved applicator for dispensing liquids and viscous fluids comprising an applicator body, an applicator tip assembly, and optionally a filter element.