Packaging Valve Axial Discharge and Air Venting Mechanism
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Solution Overview
Problem
Existing packaging systems, such as those disclosed in DE 102 17 655 A1, often suffer from liquid filling material being discharged in an oblique direction due to the sleeve-like membrane adhering to the pin, limiting their effectiveness for both liquid and pasty filling materials.
Innovation Solution
A packaging design featuring an elastically deformable external container with a valve system comprising a base body, valve holder, and cap, where the valve pin is retracted under pressure to allow axial discharge of filling material, and a venting mechanism to prevent air entry during use, ensuring efficient discharge of both liquid and pasty materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sleeve-like membrane is used in the valve to control filling material discharge, then the valve can be sealed, but the membrane adheres to the pin causing oblique discharge direction
Solution Approach 1:
The valve is divided into separate functional components: a membrane for sealing, a pin for controlling discharge, and a nozzle for directing flow. This segmentation prevents the membrane from adhering to the pin while maintaining sealing functionality and axial discharge direction.
Solution Approach 2:
A nozzle is introduced as an intermediary component between the pin and the discharge opening. The nozzle receives filling material from the pin and directs it axially, preventing direct contact between the membrane and pin while ensuring proper discharge direction.
2Stress or pressure
If air is allowed to enter the inner bag during discharge, then pressure compensation occurs, but product integrity is compromised
Solution Approach 1:
The air entry function is extracted from the inner bag system and relocated to the intermediate chamber between the external container and inner bag. This allows pressure compensation without compromising the sealed inner bag and its contents.
Solution Approach 2:
The intermediate chamber serves as an intermediary space that receives air from the external atmosphere and provides pressure compensation to the inner bag without direct air contact with the filling material. This maintains product integrity while enabling pressure balance.
3Reliability
If a complex valve mechanism is used to prevent air entry and control discharge, then product integrity is maintained, but device complexity increases
Solution Approach 1:
The valve mechanism is segmented into simple, independent components (membrane, pin, nozzle) that can be easily manufactured and assembled. This segmentation reduces complexity while maintaining the ability to prevent air entry and control discharge direction.
Solution Approach 2:
The membrane automatically seals the discharge opening when not in use, and the pin simply blocks the nozzle opening during discharge. These self-service mechanisms eliminate the need for complex actuation systems while maintaining product integrity.
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 packaging system allows for efficient, axial discharge of filling materials without air entry into the inner bag, maintaining product integrity and usability for both liquid and pasty substances, with a simplified assembly process and reduced parts.
Implementation Method 1
an elastically deformable partition wall tightly closing the preferably cylindrical valve holder
Implementation Method 2
The air in the air chamber is here compressed, which in the unpressurized state of the packaging upon discharge of filing material together with the elasticity of the partition wall presses the valve pin again firmly against the cap
Implementation Method 3
air enters due to the negative pressure, which is created in the intermediate chamber between the external container and the inner bag, through the venting valve into the air chamber
Implementation Method 4
the valve pin being retracted from the cap upon application of pressure to the external container by the pressurized filling material contained in the receiving chamber
Data Source
AI summary
The packaging comprising an essentially dimensionally stable, elastically deformable external container, an easily deformable inner bag arranged therein, which receives the filling material, and a valve is characterized in that the valve comprises a base body which extends over the opening of the external container and comprises at least one through opening for the filling material and a valve holder which has fastened therein a valve body which comprises an elastically deformable partition wall tightly sealing the valve holder, and a valve pin pointing away from the external container, said partition wall together with the valve holder delimiting an air chamber under the valve pin, and comprising a cap which is fastened to the neck of the external container and covers the base body and the valve body and which delimits a receiving chamber for the filling material between the cap and the base body and comprises an outlet opening for the filling material which in the unpressurized state of the packaging is closed by the valve pin which under preload of the elastically deformable partition wall abuts on the area of the cap containing the outlet opening, the valve pin being retracted from the cap upon application of pressure to the external container by the pressurized filling material contained in the receiving chamber so that the filling material can exit, and that the cap comprises an air chamber which is separated from the receiving chamber for the filling material and sealed with respect to the receiving chamber and the external container and which is connected by means of at least one hole through the wall of the external container to the intermediate chamber between the external container and the inner bag and to the exterior atmosphere by means of at least one venting valve.