Polygonal Pyramidal Multilayer Bottle for Complete Pouring
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Solution Overview
Problem
Traditional synthetic resin multilayer bottles face manufacturing complexity due to the need for recessed portions or grooves on the inner container, and struggle with uneven volume reduction deformation, leading to incomplete pouring and difficulty in separating the inner and outer containers during blow molding.
Innovation Solution
A synthetic resin multilayer bottle design featuring a polygonal pyramidal shape on the shoulder and bottom portions of the outer shell bottle, with a cylindrical inner container that undergoes valley folding deformation, allowing for easier manufacturing and effective content pouring by introducing air passages to maintain the deformed state, and using a release agent layer to facilitate separation during blow molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If recessed portions or grooves are formed on the outer peripheral surface of the inner container to enable deformation, then the contents can be poured out more completely, but the manufacturing method becomes complicated
Solution Approach 1:
The patent applies asymmetry by giving the outer shell bottle a polygonal pyramidal shape instead of a symmetric cylindrical shape. This asymmetric geometry creates natural deformation zones during volume reduction that eliminate the need for additional recessed portions or grooves on the inner container, thus solving the contradiction between pouring completeness and manufacturing complexity
Solution Approach 2:
Instead of modifying the inner container with recessed portions to achieve deformation, the patent inverts the approach by designing the outer shell bottle's shape to induce the necessary deformation. The polygonal pyramidal outer shell naturally guides the inner container's deformation during compression, eliminating the need for complex inner container modifications
2Productivity
If the inner container is deformed with volume reduced, then the contents can be poured out, but the volume-reduction deformation occurs unevenly in the longitudinal or radial direction making it difficult to pour out contents sufficiently
Solution Approach 1:
The polygonal pyramidal shape of the outer shell bottle creates asymmetric deformation zones that guide uniform volume reduction. The sloped surfaces and angular geometry distribute the compression forces evenly throughout the inner container, preventing localized buckling or uneven deformation that would leave liquid behind
Solution Approach 2:
The patent transitions from conventional cylindrical geometry to a polygonal pyramidal three-dimensional shape. This dimensional change in the outer shell's geometry creates multiple deformation planes that work together to achieve uniform volume reduction of the inner container, ensuring complete content discharge without leaving residual liquid
3Productivity
If the outer shell bottle and inner container are pressed together during blow molding, then they can be formed simultaneously, but they become difficult to separate from each other
Solution Approach 1:
The polygonal pyramidal shape of the outer shell bottle creates an asymmetric interface with the inner container. This asymmetric geometry, combined with the controlled release agent application, allows the containers to be firmly pressed together during molding for structural integrity while enabling easy separation afterward due to the non-uniform contact surfaces
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 simplifies manufacturing, ensures complete content pouring by controlled volume reduction, and prevents separation issues between the inner and outer containers during blow molding, enhancing the bottle's functionality and ease of use.
Implementation Method 1
outside air is introduced into a gap between the shell bottle and the container... outside air is introduced into the gap between the outer shell bottle and the inner container. As a result, the outer shell bottle is restored to its original shape due to the outside air pressure
Implementation Method 2
an inner container that undergoes deformation under application of external pressure causing reduction in its volume... the inner container is deformed by external pressure
Data Source
AI summary
A synthetic resin multilayer bottle includes an outer shell bottle and an inner container. The outer shell bottle is capable of restoring itself to its original shape against external pressure. The shoulder portion has a polygonal pyramidal shape, and the bottom portion has a polygonal pyramidal shape, including ridge lines continuing to the extended lines of the polygonal pyramidal ridge lines of the shoulder portion. The inner container includes a an inner container body having a shape extending along the internal shape of the outer shell bottle. It further includes an air passage formed between the outer mouth portion and the inner mouth portion.