Twisted Rib Panels for Synthetic Resin Container Pressure Absorption
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Solution Overview
Problem
Existing synthetic resin containers with reduced pressure absorbing panels fail to maintain their appearance and shape when the pressure inside the container decreases after hot filling, as the deformation of panel portions becomes insufficient, leading to a triangular shape deformation of the trunk.
Innovation Solution
The synthetic resin container incorporates a plurality of reduced pressure absorbing panels that twist in a circumferential direction about the central axis, with an angle of 50 degrees or more, and are arranged side by side, along with annular horizontal grooves to increase rigidity and support, maintaining the container's shape and appearance by absorbing pressure through a twisting movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reduced pressure absorbing panels are provided in the trunk, then the container can absorb reduced pressure from hot filling, but the panels become insufficient to maintain shape when reduced pressure reaches a certain level, causing the trunk to deform from circular to triangular
Solution Approach 1:
The trunk is divided into multiple panel portions (first, second, third, and fourth panel portions) arranged circumferentially, with reinforcement ribs provided between adjacent panels. This segmentation allows each panel to independently absorb reduced pressure while the reinforcement ribs prevent excessive deformation, maintaining the circular shape even when reduced pressure reaches high levels.
2Weight of moving object
If the thickness of the container is reduced to achieve lightweightness, then handling and cost improve, but the rigidity of the container deteriorates
Solution Approach 1:
The reinforcement ribs are configured with curved surfaces that extend along the longitudinal direction of the trunk, rather than straight lines. This curvature design provides enhanced structural support and rigidity to the thin-walled container, preventing deformation while maintaining lightweight construction. The curved ribs better distribute stress and resist the inward pressure from reduced pressure conditions.
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 effectively absorbs reduced pressure, preventing significant deformation of the trunk and maintaining the container's appearance and shape, while optimizing the width and depth of the panels to balance moldability and absorbing volume.
Implementation Method 1
the trunk is provided with the reduced pressure absorbing panels, which may be deformed to absorb the reduced pressure inside the container, thereby preventing significant deformation of the entire trunk
Implementation Method 2
the reduced pressure absorbing panels that is formed as a plurality of ribs extending in a vertical direction while twisting in a circumferential direction about a central axis of the trunk
Data Source
Figure 1
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AI summary
Provided is a synthetic resin container that effectively absorbs reduced pressure generated inside the container due to hot filling to maintain the appearance and shape. A synthetic resin container 1 includes a mouth 2 as a dispensing spout for a content medium, a trunk 4, extending contiguous to the mouth 2 via a shoulder 3, and a bottom 5, closing a lower end of the trunk 4. The trunk 4 is provided with reduced pressure absorbing panels 21, which are formed as ribs extending in the vertical direction while twisting in the circumferential direction about a central axis S of the trunk 4 and which are arranged side by side in the circumferential direction of the trunk 4. Twist angle of a lower end 21L with respect to an upper end 21U of each reduced pressure absorbing panel 21 about the central axis S is 50 degrees or more.