Double Container Air Inlet and Peeling Structure
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Solution Overview
Problem
Conventional double containers face issues with peeling failure and deformation of the inner layer body and outer layer body during content dispensing, due to inadequate air introduction between the layers, limiting the shape flexibility and efficiency of the container design.
Innovation Solution
The double container design incorporates an outer layer body with projecting portions and an inner layer body with corresponding projecting portions, creating a space for ambient air introduction through an air inlet hole, which facilitates peeling and prevents deformation by maintaining an air flow path between the layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner layer body is closely joined to the outer layer body after blow molding, then the container structure is stable and intact, but air cannot enter between the layers during dispensing, causing peeling failure and deformation
Solution Approach 1:
The container surface is segmented by dividing it into a plurality of container regions, with air inlet holes selectively provided in specific regions. This segmentation allows air to enter only in designated areas, enabling localized peeling without compromising the overall structural integrity of the container.
Solution Approach 2:
Different regions of the container are given different properties: some regions have air inlet holes for peeling functionality, while other regions maintain close joining for structural stability. This local differentiation allows the container to simultaneously achieve both peeling capability and structural integrity.
2Ease of operation
If air inlet holes are provided in the outer layer body, then air can be introduced between layers for peeling, but the container shape design freedom is limited
Solution Approach 1:
The container is divided into multiple regions with air inlet holes selectively positioned in specific areas. This segmentation allows the air introduction function to be integrated into the container design without requiring holes throughout the entire structure, thereby maintaining design flexibility in non-affected regions.
Solution Approach 2:
The container regions without air inlet holes serve dual purposes: they maintain structural integrity and provide design flexibility for various container shapes. The selective region division allows the same container structure to accommodate different shape requirements while maintaining peeling functionality.
3Ease of operation
If the entire inner layer body is peeled from the outer layer body, then peeling is complete, but the outer layer body deforms due to loss of structural support
Solution Approach 1:
Peeling is segmented to occur only in specific container regions with air inlet holes, rather than the entire inner layer body. This localized peeling approach allows the inner layer to separate where needed for dispensing while maintaining attachment in other regions, providing continuous structural support to the outer layer body.
Solution Approach 2:
Different regions of the inner layer body have different joining states: regions with air inlet holes are designed for peeling, while other regions maintain close joining for structural support. This local differentiation ensures that peeling occurs only where necessary without compromising overall stability.
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 configuration ensures smooth peeling of the inner layer from the outer layer, prevents peeling failure, and allows for a high degree of freedom in container shape selection while maintaining the aesthetics and operability of the container.
Implementation Method 1
ambient air is introduced between the outer layer body and the inner layer body from an air inlet hole to shrink only the inner layer body
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Double container (1) includes outer layer body (2) including tubular dispensing spout (2a) and trunk portion (2b). Dispensing spout (2a) is provided, in its side portion, with air inlet hole (4) extending through dispensing spout (2a) from inside to outside. Double container (1) also includes inner layer body (3) including opening (3a) contiguous with opening edge of dispensing spout (2a), and content container portion (3b) contiguous with opening (3a). Inner layer body (3) is accommodated in outer layer body (2). Trunk portion (2b) is provided with outer-layer-side projecting portions (5, 11, 17, 33, 34), and inner layer body (3) is provided with inner-layer-side projecting portions (6, 12, 19, 33', 34') having shapes corresponding to inner surfaces of outer-layer-side projecting portions (5, 11, 17, 33, 34). Space is provided between outer-layer-side projecting portions (5, 11, 17, 33, 34) and inner-layer-side projecting portions (6, 12, 19, 33', 34').