Valve Pre-Conditioning for Packaging Container Pressure Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Packaging containers for bulk solids often experience pressure build-up during transport, leading to bulging transport seals, peeling along the seal, and deformation of the container walls, especially at higher altitudes or with gas-producing contents like coffee.
Innovation Solution
A method of producing packaging containers with a transport closure featuring a one-way pressure relief valve, where the valve is pre-conditioned by allowing gas to exit through a through hole in the bottom plate of the plunger piston, reducing internal pressure and ensuring the valve opens more easily upon subsequent use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transport closure is provided without a pressure relief valve, then the sealing integrity is maintained, but pressure build-up causes bulging seals, peeling along the seal, and container wall deformation
Solution Approach 1:
The valve is pre-conditioned during production by pressing the transport closure into the upper body opening, which activates the valve before the product is sealed. This preliminary activation ensures the valve is ready to function immediately when pressure build-up occurs during storage or transport, preventing container deformation while maintaining sealing integrity.
Solution Approach 2:
The pressure relief valve acts as an intermediary component between the sealed container interior and the external environment. It provides a controlled pathway for gas to escape when pressure exceeds a certain threshold, thereby preventing uncontrolled deformation and seal damage while maintaining the overall sealing integrity of the container.
2Stress or pressure
If a pressure relief valve is provided in the transport closure, then pressure build-up is relieved, but the valve opening pressure may be too high for effective pressure relief
Solution Approach 1:
The valve is pre-conditioned during the production process by applying pressure through the plunger piston, which activates the valve mechanism before the container is sealed. This preliminary action reduces the opening pressure requirement, ensuring the valve can effectively relieve pressure during storage and transport without requiring excessively high internal pressure to activate.
3Ease of operation
If the valve opening pressure is reduced for easier activation, then pressure relief is more effective, but the valve may open too easily during normal handling
Solution Approach 1:
The valve is designed with differentiated pressure thresholds: a lower opening pressure for effective relief during storage and transport, and a higher reclosing pressure to prevent premature opening during normal handling. This local quality differentiation ensures the valve activates only when necessary while maintaining reliability during routine operations.
Solution Approach 2:
The pre-conditioning process during production sets the valve in an optimal state with reduced opening pressure. The valve mechanism is activated and conditioned before final sealing, ensuring it will open at the appropriate pressure threshold during storage without opening prematurely during handling.
4Stress or pressure
If gas can escape during production pressing, then pressure build-up is prevented, but gas may escape at the sides of the transport closure instead of through the valve
Solution Approach 1:
The bottom plate with its opening positioned over the valve acts as an intermediary structure that directs gas flow. During production pressing, this configuration ensures gas is channeled through the valve mechanism rather than escaping laterally, thereby preventing pressure build-up while maintaining manufacturing precision and proper valve conditioning.
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 pre-conditioning of the valve reduces the risk of container deformation and seal damage by managing pressure effectively, while also lowering the required opening pressure and increasing gas flow through the valve.
Implementation Method 1
a one-way pressure relief valve for allowing gas in the inner compartment of the packaging container to exit therefrom
Implementation Method 2
pressing the transport closure with the plunger piston comprising the bottom plate into the upper body opening such that a pressure above an ambient pressure is produced within the tubular container body
Data Source
AI summary
The present disclosure relates to methods of producing a packaging container for bulk solids. The packaging container has an inner compartment and a transport closure closing the inner compartment, the transport closure being provided with a pressure relief valve, the method includes the steps of forming a tubular container body having an upper body opening; presenting the container body to an upper body opening sealing station comprising a plunger piston comprising a bottom plate, the bottom plate having a through hole; closing the upper body opening by pressing the transport closure into the upper body opening such that a pressure above an ambient pressure is produced within the tubular container body, allowing gas to exit the valve and the valve to be pre-conditioned; and attaching the transport closure to the container body wall.