Packaging Bag Spout Check Valve for Oxidation-Safe Dispensing
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Solution Overview
Problem
Existing spout assemblies for packaging bags face challenges in maintaining a tight seal, preventing oxidation, and ensuring controlled discharge of contents, with issues such as incomplete sealing, high pressure requirements for discharge, and difficulties in manufacturing and assembly processes.
Innovation Solution
A spout assembly featuring a check valve with a spool and urging member that allows content flow only when internal pressure or suction reaches a predetermined level, combined with a drip preventing portion to prevent leakage, and a method of manufacturing that allows for flexible assembly and sealing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a valve body formed of elastic material with a cut-in portion is used, then air invasion is prevented, but sealing is incomplete and oxidation prevention is insufficient
Solution Approach 1:
The valve body is divided into a main body portion and a separate valve member (spool) that can move independently. This segmentation allows the valve member to provide precise sealing control while the main body maintains structural integrity, resolving the contradiction between preventing air invasion and achieving reliable sealing.
Solution Approach 2:
The valve member is designed to move dynamically between open and closed positions based on pressure differential. This dynamic mechanism ensures complete sealing when closed while allowing controlled opening for discharge, eliminating the incomplete sealing problem of static cut-in portions.
2Productivity
If the cut-in portion is opened by inner content pressure, then content discharge is enabled, but high inner pressure causes violent discharge
Solution Approach 1:
The valve member acts as an intermediary between the high-pressure inner content and the external environment. It mediates the pressure release by controlling the opening degree and timing of discharge, preventing violent discharge while maintaining productive content emptying.
Solution Approach 2:
The valve member changes the pressure parameter by gradually releasing inner content rather than sudden discharge. This parameter control transforms the high-pressure state into a controlled discharge process, eliminating violent discharge while maintaining discharge efficiency.
3Ease of manufacture
If the valve body is mounted to the base portion of the spout assembly, then assembly is simplified, but manufacturing flexibility is reduced
Solution Approach 1:
The spout assembly is segmented into a main body and a detachable valve member. This segmentation maintains assembly simplicity while enabling manufacturing flexibility, as the valve member can be installed at different stages of the manufacturing process without complicating the overall assembly.
Solution Approach 2:
The valve member is designed with universal mounting capabilities that allow it to be installed in various configurations. This multi-functionality enables the same component to adapt to different manufacturing processes and assembly methods, maintaining both simplicity and flexibility.
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 provides effective oxidation prevention, controlled discharge of contents, and facilitates easier manufacturing and assembly, ensuring high sealing performance and preventing content spillage or oxidation.
Implementation Method 1
an urging member having an outer peripheral surface fixed to the inner peripheral surface of the spout assembly and adapted to urge the spool toward the bag body side, the urging member is formed with a seat surface for the spool urged by the urging member to abut against the seat surface
Implementation Method 2
when an inner pressure inside the bag body or a suction force from the mouth portion reaches a predetermined value, the spool is separated from the seat surface against the urging force of the urging member, thereby permitting the inner content to flow from the bag body side to the mouth portion side
Data Source
AI summary
A spout assembly for a packaging bag for improving the prevention of oxidation to an inner content and discharging such content at a desired amount. The spout assembly mounted to the bag body includes a spool to move along the axial direction of the spout assembly and an urging member having an outer peripheral surface fixed to the inner peripheral surface of the spout assembly and adapted to urge the spool toward the bag body side. A check valve allows the inner content to flow only from the bag body side toward the mouth portion side. The urging member has a seat surface for the spool and the urging member presses the spool against the seat surface to shut off the flow of the inner content, and when an inner pressure of the bag body or a suction force of the mouth reaches a predetermined value, the spool separates from the seat surface.