Vacuum-Resistant Ribs for Blow-Molded Containers
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Solution Overview
Problem
Blow-molded plastic containers used in the hot-fill process face deformation and strength issues due to pressure differentials, with existing techniques failing to adequately control deformation without compromising aesthetics or strength.
Innovation Solution
The design incorporates a body portion with continuous ribs extending about the outer perimeter, featuring alternating horizontal and branched segments, which provide structural support and control distortion by aligning midpoints of segments to maintain container integrity under vacuum conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional hoop-ring designs are used to control deformation, then container strength is maintained, but the container exhibits increased vertical deformation and compromised aesthetics under vacuum conditions
Solution Approach 1:
The continuous rib structure is segmented into multiple ribs spaced around the container circumference, with each rib containing horizontal segments and branched segments. This segmentation allows the deformation control function to be distributed across multiple structural elements rather than relying on traditional hoop-rings, reducing vertical deformation while maintaining container strength and aesthetics.
2Stability of the object's composition
If vacuum panels or diaphragm features are incorporated to control deformation, then pressure differential effects are reduced, but the container aesthetics and strength are compromised
Solution Approach 1:
The invention merges the deformation control function with the structural reinforcement function by integrating continuous ribs that serve dual purposes: controlling vertical deformation under vacuum while maintaining container strength. The ribs are formed as integral parts of the container body, eliminating the need for separate vacuum panels or diaphragm features that would compromise aesthetics and strength.
3Shape
If continuous ribs with branched segments are used, then vertical deformation is reduced, but the manufacturing complexity increases
Solution Approach 1:
The continuous rib structure uses parameter changes in the rib geometry, including the spacing between ribs, the dimensions of horizontal and branched segments, and the vertical positioning of rib features. By optimizing these parameters, the design achieves effective vertical deformation control while managing manufacturing complexity through systematic variation of geometric parameters rather than requiring entirely new structural concepts.
Data Source
AI summary
Container having a body portion with sidewall defining outer perimeter and hollow interior. The body portion includes a plurality of continuous ribs extending about the outer perimeter of the sidewall, each rib having alternating horizontal segments and branched segments. Each branched segment includes a top branch and bottom branch joined at either end to define a bounded area therebetween. The plurality of continuous ribs includes at least a first continuous rib and second continuous rib spaced vertically from the first continuous rib. A midpoint of each branched segment of the first continuous rib is aligned along a vertical axis with a midpoint of a corresponding horizontal segment of the second continuous rib, and a midpoint of each horizontal segment of the first continuous rib is aligned along a vertical axis with a midpoint of a corresponding branched segment of the second continuous rib.