Dispensing Valve Pouch Reinforcement via Annular Disc
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Solution Overview
Problem
The existing assembly for dispensing pressurized fluids, foams, or gels is prone to tears at the pouch opening when welded directly to the outlet tube, leading to instability and potential leaks during drop tests.
Innovation Solution
The peripheral edge of the pouch opening is reinforced with an annular disc made of a readily weldable material, such as polyethylene or polypropylene, which is welded to the pouch film and supports the outlet tube, preventing tears by stabilizing the passageway and eliminating the need for additional welding around the cylindrical-cap-shaped widened portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pouch is welded directly to the outlet tube or widened portion, then a fluid-tight connection is achieved, but the pouch can tear around the pouch opening during drop tests
Solution Approach 1:
An annular disc is introduced as an intermediary component between the pouch opening and the outlet tube. The disc is welded to the pouch film and supports the outlet tube, distributing mechanical stresses away from the pouch opening and preventing tears during drop tests.
Solution Approach 2:
The connection structure is divided into separate functional components: the pouch film, the annular disc reinforcement, and the outlet tube. This segmentation allows each component to be optimized independently - the disc provides structural support while the pouch maintains its sealing function.
2Reliability
If the pouch film is welded to the periphery of the cylindrical-cap-shaped widened portion, then tear resistance is improved, but the manufacturing process becomes relatively complex
Solution Approach 1:
The annular disc serves as a simplified intermediary that eliminates the need for complex welding to the cylindrical-cap-shaped widened portion. The disc provides a flat, stable surface for welding the outlet tube, reducing assembly complexity while maintaining tear resistance.
3Reliability
If the pouch opening is stabilized with an annular disc, then tear resistance is improved, but the assembly process requires additional steps
Solution Approach 1:
The annular disc is prepared and positioned in advance during pouch assembly, before the outlet tube is attached. This preliminary action ensures the pouch opening is pre-reinforced, allowing for faster overall assembly since the structural support is already in place when the outlet tube is mounted.
Data Source
AI summary
Assembly (10) consisting of a dispensing valve (11) for dispensing pressurized fluids, and a pouch (12) of flexible film material in fluid-tight connection therewith, which is placeable in an outer container (15) through an opening (14) therein that is sealable by a cover (13), the dispensing valve (11) having a valve body (18) which is mountable fluid-tightly at the edge (16) of a cover opening (17) formed in the container cover (13), to which valve body (18) an outlet tube (20) extending through a pouch opening (19) is able to make fluid-tight connection. The outlet tube (20) has a disc-shaped, especially cylindrical-cap-shaped, widened portion (21) extending around the pouch opening (19) inside the pouch (12). The pouch (12) is supported against the widened portion (21) of the outlet tube (20), with the intermediate arrangement of an annular disc (22) that bounds the pouch opening (19).