Hot Fill Container Vacuum Uptake Grooves
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Solution Overview
Problem
Hot fill type plastic containers face challenges in accommodating volumetric shrinkage during cooling, resisting creasing during vacuum uptake, and providing sufficient rigidity for comfortable gripping without excessive sidewall deflection.
Innovation Solution
A hot fill type plastic container design featuring a vacuum uptake portion with four side panel portions, each having two vertically centered grooves with a length to width ratio of at least 5:1, and no other surface features, to enhance vacuum uptake and structural rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If recessed concave vacuum panels are incorporated into the side wall to accommodate volumetric shrinkage, then the container can accommodate cooling shrinkage, but the container structure becomes more complex and material usage increases
Solution Approach 1:
The side wall is divided into multiple flat panels separated by vertical grooves, allowing each panel to independently flex inward during vacuum uptake without requiring complex recessed structures. This segmentation enables effective volume accommodation while maintaining overall structural simplicity
Solution Approach 2:
The vertical grooves are strategically positioned to create localized flexibility zones between rigid panel sections. This allows the flat panels to flex inward locally during cooling while maintaining global structural integrity and avoiding the need for complex recessed designs throughout the entire container
2Strength
If horizontal ribs are added to control flexure and impart rigidity, then the container gains structural strength, but creasing of the vacuum panel occurs during vacuum uptake
Solution Approach 1:
Vertical grooves are used instead of horizontal ribs, creating a different orientation of structural elements that provides rigidity in the vertical direction while allowing horizontal flexing during vacuum uptake. This asymmetric approach to structural reinforcement avoids the creasing problem caused by horizontal ribs
Solution Approach 2:
Instead of using horizontal ribs that constrain flexure in the horizontal plane, vertical grooves are introduced to provide structural support in the vertical dimension while permitting the necessary horizontal flexing motion during vacuum uptake, thus preventing crease formation
3Strength
If more material is used to increase container rigidity for comfortable gripping, then the container provides sufficient structural support, but the amount of material usage increases
Solution Approach 1:
The side wall is segmented into multiple flat panels separated by vertical grooves, creating a structured design that provides rigidity through geometric configuration rather than material quantity. This segmentation allows the container to maintain grip stiffness while using less material overall
Solution Approach 2:
The vertical grooves modify the structural parameters of the side wall by creating rigid panel sections with defined boundaries, enhancing the container's resistance to grip-induced deflection without increasing material usage. The grooves act as natural reinforcement elements
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
The design provides superior resistance to creasing during vacuum uptake and maintains sufficient rigidity for easy handling, while minimizing material usage and avoiding excessive sidewall deflection.
Implementation Method 1
After filling, such containers undergo significant volumetric shrinkage as a result of the cooling of the product within the sealed container
Implementation Method 2
Ribs or grooves are sometimes provided in order to control the flexure of the side wall during the hot fill process
Implementation Method 3
Hot fill type containers accordingly must be designed to have the capability of accommodating such shrinkage
Data Source
AI summary
A hot fill type plastic container includes a bottom portion and a main body having a vacuum uptake portion that is bounded by upper and lower horizontal grooves. The vacuum uptake portion has four side panel portions, and each of the side panel portions has at least one vertical groove defined therein. The vertical grooves are substantially centered with respect to the side panel portions. No surface features other than the vertical grooves are included on the side panel portions. The main body further includes upper and lower round portions that are respectively positioned above and below the vacuum uptake portion.