Extrusion Blow Moulded Container Segmented Sealing Surfaces
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Solution Overview
Problem
The complexity of filling plastic containers produced by extrusion blow molding is increased by air displacement during filling, leading to potential foam formation and impaired filling efficiency, especially with small outlet openings.
Innovation Solution
A container design with a first end featuring two sealing surfaces that can be connected fluid-tight, allowing air to escape pressure-free and enabling high-speed filling, with the option to close using welding or gluing, and a stable base for enhanced stability and decoration possibilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the container has a small outlet opening for filling, then the container structure is compact and simple, but the filling speed decreases and foam formation increases due to air displacement
Solution Approach 1:
The container end is segmented into two separate sealing surfaces instead of a single closed outlet opening. This segmentation allows the filling opening to remain open during the filling process, enabling air to escape freely while maintaining a compact container structure. The two sealing surfaces can be connected after filling to close the outlet, thus resolving the contradiction between structural simplicity and filling speed.
2Strength
If the outlet opening is small, then the container maintains structural integrity, but air displacement during filling causes foam formation and reduces filling efficiency
Solution Approach 1:
The harmful factor of trapped air is extracted by providing an escape path through the two separate sealing surfaces. During filling, air can escape between the sealing surfaces without being trapped, preventing foam formation. After filling, the sealing surfaces are connected to close the outlet, maintaining structural integrity. This extraction of trapped air eliminates the harmful effect while preserving container strength.
3Reliability
If the sealing surfaces are connected during filling, then the container is fluid-tight, but air cannot escape and filling speed is impaired
Solution Approach 1:
The filling process is performed before the sealing surfaces are connected. The two sealing surfaces remain separate during filling to allow air escape, and are connected only after filling is complete. This preliminary action sequence ensures that the container achieves fluid-tight reliability after filling while maintaining high filling speed during the filling operation.
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
This design simplifies the filling process by allowing air to escape without impairing the filling speed, prevents foam formation, and provides a stable and versatile container for efficient filling and storage, while allowing for various geometric configurations and decoration options.
Implementation Method 1
The first and second sealing surfaces can be fluid-tightly connected to each other... After filling, the container can be sealed fluid-tight by means of the sealing surfaces formed on the inner wall. Sealing can be achieved by gluing or, preferably, by welding.
Data Source
Figure 1
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AI summary
The invention relates to a container (11) produced from a plastic material by extrusion blow moulding, comprising a container body (13) and a first end (15) and a second end (17) substantially opposite the first end (15). According to the invention, the first end (15) has on the inner wall thereof a first sealing surface (21a) and a second sealing surface (21b) substantially opposite the first sealing surface (21a), wherein the first and the second sealing surface (21a, 21b) can be connected to one another in a fluid-tight manner. The second end (17) is closed in a fluid-tight manner and is formed as a container base (18) having a base (19).