Fluid Container Collar Sealing with Oblong Welding Zone
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Solution Overview
Problem
Existing deformable laminated film bag containers for fluid substances face sealing issues at the welding zone between the bag and the pump coupling collar, leading to air contamination and compromised seals.
Innovation Solution
A fluid substance container design featuring a collar with an oblong welding zone and fins that thermally bond with laminated film sheets, along with a sealing lip and tubular element to ensure a perfect seal, allowing for both manual and automated welding operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid collar is permanently welded to the laminated film bag, then the pump can be coupled to the bag, but irregularities in the welding zone allow air to enter the bag and compromise the seal
Solution Approach 1:
The collar is pre-formed with an oblong cross-section and integrated fins before welding. This preliminary shaping ensures that when the collar is welded to the laminated film sheets, the welding zone naturally forms a regular, flat surface that prevents air penetration and ensures reliable sealing between the pump and bag.
2Ease of manufacture
If a traditional cylindrical collar is used, then the structure is simple, but the welding zone creates sealing problems and automation of welding operations becomes difficult
Solution Approach 1:
The collar is designed with an oblong (non-circular) cross-section instead of a traditional cylindrical shape. This asymmetric geometry, combined with integrated fins, creates a flat welding surface that is much more suitable for automated welding processes while simultaneously improving seal quality by eliminating the irregularities that cause air leakage.
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 design effectively seals the pump to the bag, minimizes air entry, and facilitates efficient automation of the welding process, ensuring a hermetically sealed system that maintains product integrity.
Implementation Method 1
The pair 3A, 3B of laminated film sheets is thermally bonded, in a sealed manner, to the outer surface of the collar 2
Data Source
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AI summary
A fluid substance container (1) comprising a collar (2) featuring a passage (5) and a pair (3A, 3B) of laminated film sheets heat-welded along perimetral welding lines (S1) so as to form a bag (4), the pair of sheets (3A, 3B) also being heat-welded to the collar (2) so that the passage (5) in the collar (2) provides access to interior of the bag (4); the collar (2) features a cup-shaped part in which the said passage (5) is formed, there being a sealing lip (13) extending from a bottom (12) of the said cup-shaped part, the said sealing lip being formed integrally with the collar (2) and intended to cooperate in an air-tight manner with an outer surface (21) of the body of a hermetic pump (20) which may be housed, at least partially, in the collar (2).