Multi-Stage Can Expansion Tool for Concentric Forming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional beverage container expansion processes often result in uneven forming, off-center containers, and material splitting due to inadequate piloting during the expansion process, leading to inefficiencies and defects.
Innovation Solution
The use of a multi-stage expansion tool system with constant piloting and guiding mechanisms, where each expansion tool has a series of pilot and expansion portions with increasing diameters, ensuring centralized expansion and smoothening of deformities, thereby minimizing defects and achieving uniform container expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional expander tool with a single pilot portion is used, then the expansion process is simple, but uneven forming occurs causing off-center containers and material splitting
Solution Approach 1:
The expansion tool is segmented into multiple pilot portions with different diameters arranged in sequence along the expansion direction. Each pilot portion engages with the container at a different stage of expansion, providing progressive guidance and support. This segmentation allows the tool to maintain constant piloting throughout the expansion process, preventing off-center formation and material splitting while achieving uniform container expansion.
Solution Approach 2:
The multiple pilot portions are arranged in a predetermined sequence along the expansion tool, with each pilot portion prepared to engage the container at a specific stage of expansion. The pilot portions with smaller diameters engage first to guide the initial expansion, followed by progressively larger pilot portions that take over as the container expands. This preliminary arrangement ensures continuous piloting action throughout the entire expansion process.
2Loss of substance
If multiple expansion iterations are performed to thin the metal material, then less metal is used reducing cost, but processing time increases
Solution Approach 1:
The expansion tool performs multiple expansion functions in a single continuous operation. The multiple pilot portions and expansion portions work simultaneously and sequentially to achieve progressive thinning of the metal material while maintaining continuous contact and control with the container. This eliminates the need for separate expansion iterations, reducing processing time while still achieving the desired material reduction and cost savings.
3Productivity
If expansion is performed without piloting, then the process is faster, but the formed portion becomes off-center and thinning occurs on one side wall causing splitting
Solution Approach 1:
The piloting function is segmented into multiple pilot portions with different diameters positioned along the expansion tool. Each pilot portion provides localized guidance and support at different stages of expansion, ensuring the container remains centered and evenly supported throughout the high-speed expansion process. This segmented piloting maintains structural integrity while allowing rapid expansion.
Solution Approach 2:
Different pilot portions are designed with specific diameters and positions tailored to local requirements during expansion. The smaller pilot portions provide guidance at the initial stage where the container is narrower, while larger pilot portions provide support at later stages as the container expands. This localized quality ensures appropriate piloting at each stage, preventing off-center formation and material splitting during fast expansion.
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
This approach enhances the efficiency and uniformity of the expansion process, reducing material stress and defects, resulting in smoother, concentrically expanded containers with minimized visual imperfections.
Implementation Method 1
The forming portion smooths at least one deformity formed in the expanded portion of the container by the first expansion tool
Data Source
AI summary
An expansion tool for expanding an article. The expansion tool includes a lead-in portion extending outwardly from a first end of the expansion tool and a first pilot portion extending from the lead-in portion. The first pilot portion has a first diameter. The expansion tool further includes a second pilot portion being generally parallel with the first pilot portion. The second pilot portion has a second diameter larger than the first diameter. The expansion tool further includes a forming portion bridging the first pilot portion and the second pilot portion. The forming portion is generally sloped. The expansion tool further includes an expansion portion extending from the second pilot portion toward a second end of the expansion tool. The expansion portion has a third diameter larger than the second diameter.