Plastic Bottle Base Tie Members for Pressure Resistance
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Solution Overview
Problem
Thin-walled plastic bottles used for beverages lack stability and pressure resistance, particularly for carbonated beverages, and require increased material consumption and gripping stability, which existing designs fail to adequately address.
Innovation Solution
The design incorporates tie members extending from the central area of the base to the side wall, which also extend into the body and shoulder sections, along with reinforcement grooves, to enhance stability and pressure resistance without significantly increasing wall thickness, and provides additional gripping stability through circumferential grooves and structural elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If smooth-walled designs are used for carbonated beverages, then pressure resistance is maintained, but material consumption increases and gripping stability deteriorates
Solution Approach 1:
The patent applies local quality by implementing ribs only in specific regions (base and shoulder sections) rather than throughout the entire bottle. The ribs in the base section extend radially outward to provide pressure resistance locally, while the shoulder section ribs provide structural support. This localized approach maintains pressure resistance where needed while reducing overall material consumption compared to a fully ribbed design.
2Ease of operation
If strong ribbing is provided for non-carbonated beverages, then gripping stability and top load capacity are improved, but axial elongation occurs under internal pressure
Solution Approach 1:
The patent applies local quality by providing ribs in specific sections (base and shoulder) rather than uniformly throughout the bottle body. The base section ribs provide gripping stability and structural support, while the shoulder section ribs reinforce the transition area. The smooth-walled central body section prevents axial elongation under pressure, as pressure acts perpendicular to the bottle axis without rib-induced expansion.
3Quantity of substance
If wall thickness is reduced to cut costs, then material consumption decreases, but stability and pressure resistance deteriorate
Solution Approach 1:
The patent applies local quality by concentrating structural reinforcement ( ribs) in specific sections where they are most effective for pressure resistance and stability, while maintaining thinner walls in other areas. The base section ribs provide structural support and pressure resistance, the shoulder section ribs reinforce the critical transition area, and the smooth central body maintains adequate strength with less material.
Solution Approach 2:
The patent applies segmentation by dividing the bottle into distinct functional sections with different wall structures: a base section with radial ribs for pressure resistance, a smooth-walled central body for minimal material consumption, and a shoulder section with ribs for structural support. This segmented approach optimizes the balance between material usage and structural integrity.
4Strength
If tie members are extended into the body and shoulder sections, then stability and pressure resistance are improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the tie members with the existing rib structures in the base and shoulder sections. The tie members are formed as continuous extensions of the rib structures during the molding process, combining the functions of reinforcement and structural support into unified elements. This reduces the number of separate components and simplifies manufacturing while maintaining enhanced pressure resistance and stability.
Data Source
AI summary
A plastic container includes a neck section, a shoulder section, a body section, and a base section. The base section includes at least two tie members extending from a central area to a side wall of the base section and in a longitudinal direction into the body section. The at least two tie members are arranged between feet of the base section. Circumferential grooves are oriented in a peripheral direction in the body section between the at least two tie members. The at least two tie members further extend into a labeling area of the container in the form of transverse grooves positioned longitudinally between variable depth grooves such that in the labeling area the transverse grooves are aligned with flattened portions of the variable depth grooves at between 0.1 mm and 0.3 mm in depth.