Internal Mechanical Tabs for Adhesive-Free Container Assembly
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Solution Overview
Problem
Current paper bottles and containers require complex and costly assembly processes using adhesives, which are sensitive to environmental factors and result in low manufacturing output and surface irregularities due to external assembly features.
Innovation Solution
Mechanical connection features such as tabs and slots are integrated internally to connect container parts, allowing for smooth exterior surfaces and eliminating the need for adhesives, with retention structures guiding and deflecting inter-connecting features to reduce friction and prevent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive connection methods are used to join container parts, then the container parts can be connected together, but the manufacturing process becomes complex and costly with low output and surface irregularities
Solution Approach 1:
The patent replaces the adhesive (chemical) connection system with a mechanical interlocking system using tabs and slots. The tab on one container part inserts into a slot on another part, creating a mechanical connection that eliminates the need for adhesives, simplifying the assembly process while maintaining connection strength.
Solution Approach 2:
The patent extracts the connection features (tabs and slots) from the exterior surface and places them on the interior surface of the container. This internal placement removes the harmful effect of external assembly features on surface smoothness while maintaining the mechanical connection function.
2Ease of manufacture
If tabs are inserted into openings during engagement, then container parts can be connected, but the tab folds or creases leading to weakness under loading
Solution Approach 1:
The patent incorporates a curvature or bend in the tab design before insertion that allows the tab to flex during the insertion process. This pre-designed flexibility cushions the insertion action, preventing folding or creasing that would weaken the tab under loading conditions.
Solution Approach 2:
The patent modifies the geometric parameters of the tab, specifically introducing a curved path or bend radius that changes the insertion trajectory. This parameter change allows smooth insertion without sharp folds or creases, maintaining tab strength while enabling easy assembly.
3Strength
If adhesive is applied to detailed paths for pulp bottle assembly, then container parts can be joined, but manufacturing output decreases and cost increases
Solution Approach 1:
The patent replaces the adhesive application process with a mechanical snap-fit insertion process. The tab simply needs to be inserted into the slot and engage mechanically, eliminating the time-consuming adhesive application, positioning, and curing steps, thereby increasing manufacturing output while maintaining joint strength.
Solution Approach 2:
The mechanical interlocking system is designed to be self-aligning and self-securing. The tab automatically finds and engages with the slot through its geometric design, eliminating the need for precise manual positioning and external fastening operations, which simplifies the process and increases productivity.
Data Source
AI summary
Methods and systems for integrating multiple portions of a container are provided. The method and system are specifically designed for integrating multiple shell portions with ear lobe-shaped tabs. The method comprises: providing a first set of retention structures to be associated with a plurality of inter-connecting features formed on an edge of a first shell part, wherein the first set of retention structures comprise at least a lead-in feature and a retention feature; providing a second set of retention structures to be associated with a plurality of inter-connecting features formed on an edge of a second shell part, wherein the second set of retention structures comprise at least a deflection feature and a retention feature; and engaging the two shell parts with aid of the retention structures.