Conical Mandrel for Necked Can Stability
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Solution Overview
Problem
Conventional mandrels are not designed to securely hold necked cans during the decorating process, leading to wobbling due to the smaller cross-sectional area at the open end, which can result in deformation and poor decoration quality.
Innovation Solution
A mandrel with a conical outer surface portion that flares outward, allowing the can to be drawn against it, and a pressurized space between the cylindrical portion and the can to resist deformation, ensuring stability during decoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cylindrical mandrel is used for necked cans, then the mandrel can pass through the open end, but the can will wobble and deform during decorating
Solution Approach 1:
The mandrel features a conical portion with a larger cross-sectional area than the cylindrical portion, creating localized structural variation. This conical section specifically addresses the necked can's geometry by providing enhanced support in the critical region where the can walls are thinner and more prone to deformation, while the cylindrical portion maintains compatibility with the can's main body.
Solution Approach 2:
The mandrel transitions from a symmetric cylindrical shape to an asymmetric form with a conical portion. This asymmetric design allows the mandrel to better match the asymmetric stress distribution in necked cans during rotation, providing stabilizing contact surfaces that prevent wobbling while maintaining rotational balance.
2Stability of the object's composition
If a mandrel with larger cross-sectional area is used to support the can body, then the can is stable, but it cannot pass through the necked open end
Solution Approach 1:
The mandrel is segmented into two distinct functional portions: a conical portion with larger cross-sectional area for providing stable support contact, and a cylindrical portion with smaller cross-sectional area for passing through the necked open end. This segmentation allows each portion to optimize its function without compromising the other.
Solution Approach 2:
The mandrel design transitions from a uniform one-dimensional cylindrical form to a two-dimensional tapered form with varying cross-sectional area along its length. This dimensional variation enables the mandrel to provide adequate support surface area while maintaining compatibility with the constrained necked opening.
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 conical mandrel design effectively secures necked cans, preventing wobbling and deformation, thereby ensuring consistent and high-quality decoration of the cans.
Implementation Method 1
Suction applied through an axial passage of the mandrel draws the can to a final seated position on the mandrel
Implementation Method 2
the space between the cylindrical portion of the mandrel body and the can is pressurized so as to resist deformations in the can during the decorating process
Data Source
AI summary
A mandrel wherein a portion of the mandrel body outer surface is conical; i.e., flared outwardly, is provided. In this configuration, the necked can is drawn against the conical portion of the mandrel body outer surface while a generally cylindrical portion of the mandrel body extends into the can. Further, the space between the cylindrical portion of the mandrel body and the can is pressurized so as to resist deformations in the can during the decorating process. In an exemplary embodiment, the mandrel includes an elongated mandrel body with an outer surface, a proximal, first end, a proximal medial portion, a distal medial portion, and a distal, second end and having an axis of rotation. The mandrel body outer surface includes an elongated conical portion; the mandrel body outer surface conical portion is disposed adjacently about the mandrel body first end.