Single-Piece Blank Clamshell Carton Design
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Solution Overview
Problem
The use of corrugated cardboard in heavier-duty applications is costly and inefficient due to higher material expenses and increased transportation and storage requirements compared to single-layer paperboard, which is lighter and less expensive but insufficient for such applications.
Innovation Solution
A single-piece blank for a clamshell-style carton is designed with multiple fold lines, allowing it to be formed from non-corrugated paperboard with a water-resistant coating, featuring a hinged edge for clamshell movement and additional features like overlapping side panels and double-fold end panels to enhance durability and storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If corrugated cardboard is used for heavier-duty applications, then durability and strength are improved, but material cost and transportation cost increase
Solution Approach 1:
The single-piece blank is divided into multiple functional sections including a bottom container portion, a cover portion, and intermediate sections with fold lines. This segmentation allows the flat blank to be transformed into a three-dimensional carton structure that provides durability through geometric configuration rather than material thickness, resolving the contradiction between using expensive corrugated material and achieving adequate strength.
Solution Approach 2:
The invention transitions from a two-dimensional flat corrugated cardboard sheet to a three-dimensional carton structure formed by folding a single-piece blank along multiple fold lines. This dimensional transformation creates structural integrity through the carton's geometry and interlocking flaps, eliminating the need for expensive corrugated material while maintaining durability.
2Strength
If corrugated cardboard is used for heavier-duty applications, then strength is improved, but transportation and storage requirements increase
Solution Approach 1:
The single-piece blank is designed to fold into a compact three-dimensional carton structure where the bottom container portion and cover portion nest together. The intermediate sections with fold lines allow the carton to collapse into a flat or compact form for efficient storage and transportation, reducing volume requirements while maintaining structural strength when assembled.
Solution Approach 2:
The invention utilizes dimensional transformation by folding a flat single-piece blank into a three-dimensional carton structure. This allows the carton to occupy minimal space during storage (flat or collapsed state) and efficiently utilize storage volume when assembled, resolving the contradiction between strength requirements and storage efficiency.
3Productivity
If a single-piece blank design is used, then manufacturing efficiency is improved, but structural complexity increases
Solution Approach 1:
The single-piece blank is segmented into distinct functional areas including bottom panels, side panels, end panels, and cover portions, each separated by fold lines. This segmentation allows the blank to be manufactured as a simple flat sheet and then transformed into a complex three-dimensional structure through folding, improving manufacturing efficiency while achieving the required structural complexity.
Solution Approach 2:
The single-piece blank serves multiple functions simultaneously: it forms the bottom container, provides structural support through intermediate sections, creates the cover portion, and includes features for assembly and disassembly. This multi-functionality is achieved within a single integrated blank design, improving manufacturing efficiency by eliminating the need for multiple separate components while managing structural complexity through unified design.
Data Source
AI summary
A single-piece blank forms a clamshell-style carton. This single-piece blank includes a plurality of fold lines. These fold lines are oriented and positioned such that folding the single-piece blank along the plurality of fold lines forms this clamshell-style carton. The resultant carton will tend to have a first compartment and a second compartment. Both compartments comprise corresponding storage areas of approximately equal size and both also share a particular fold line that also serves as a hinged edge.