Bottle Inner Wall Segmentation for Heat Fill Stability
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Solution Overview
Problem
Bottles made of synthetic resin materials deform inwardly during heat filling, causing the grounding portion to protrude downward, which is a concern for weight reduction and structural integrity.
Innovation Solution
The inner circumferential wall of the bottle features a series of concave or convex portions along its entire circumference, including the lower end edge, enhancing rigidity and preventing deformation during heat filling, while ensuring grounding stability and accurate formation of the bottom portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the bottle is made of synthetic resin material with reduced weight, then the weight is reduced, but the inner circumferential wall portion deforms to collapse inward during heat filling
Solution Approach 1:
The inner circumferential wall portion is segmented by forming multiple concave portions or convex portions along the circumferential direction. This segmentation creates multiple rigid sections that resist deformation during heat filling, allowing weight reduction while maintaining structural integrity through distributed reinforcement rather than a single thick wall design
Solution Approach 2:
The concave or convex portions are strategically positioned at specific locations including the lower end edge of the inner circumferential wall portion where deformation is most likely to occur. This local quality enhancement provides targeted rigidity reinforcement exactly where needed during heat filling, rather than uniformly thickening the entire wall
2Weight of moving object
If the inner circumferential wall portion is made thinner for weight reduction, then the weight is reduced, but the grounding portion deforms to protrude downward during heat filling
Solution Approach 1:
The grounding portion is segmented by forming concave portions that extend onto it, creating multiple anchored sections. This segmentation prevents the grounding portion from deforming and protruding downward during heat filling by distributing the thermal stress across multiple reinforced points rather than allowing uniform deformation
Solution Approach 2:
The concave or convex portions are pre-formed on the inner circumferential wall portion and grounding portion before heat filling occurs. This preliminary structural preparation creates rigid sections that proactively resist the anticipated thermal deformation forces, preventing grounding portion protrusion before it can occur during the heat filling process
Data Source
AI summary
A bottle includes a bottom portion which includes a bottom wall portion with a grounding portion located at an outer circumferential edge thereof, and a tubular heel portion extending upward from an outer circumferential edge of the grounding portion, in which the bottom wall portion includes an inner circumferential wall portion extending upward from an inner circumferential edge of the grounding portion, and a recessed wall portion extending inward in a radial direction from an upper end of the inner circumferential wall portion, a plurality of concave portions or a plurality of convex portions are formed on the inner circumferential wall portion over the entire circumference, and the plurality of concave portions or the plurality of convex portions are located at a portion in the inner circumferential wall portion including at least a lower end edge of the inner circumferential wall portion.