Cylindrical Capping Head Structure for Lighter, Stronger Can Seaming
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Solution Overview
Problem
The existing capping heads for threaded cans have a complex shape, leading to reduced strength and increased weight, necessitating the use of rigid materials like stainless steel.
Innovation Solution
A capping head design featuring a cylindrical body with through-holes for swing shafts, accommodating biasing members, and a simplified structure, allowing for the use of lighter materials such as aluminum alloys and engineering plastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the body has a complicated shape to accommodate components, then the capping head can function properly, but the strength of the body decreases and weight increases
Solution Approach 1:
The body is divided into multiple functional portions: a body main portion with cylindrical outer shape, a swing shaft housing portion disposed between outer and inner peripheral portions, and a spindle attachment portion. This segmentation allows each portion to be optimized for its specific function while maintaining overall structural integrity and strength.
2Strength
If high rigidity materials like stainless steel are used to ensure body strength, then the strength is improved, but the weight increases
Solution Approach 1:
The body is made from aluminum alloy or engineering plastic, which are lighter materials compared to traditional stainless steel. The optimized structural design with specific portions and through-holes compensates for the lower material strength, allowing weight reduction while maintaining sufficient strength and rigidity for capping operations.
3Weight of moving object
If the body shape is simplified to reduce weight, then weight reduction is achieved, but the strength and functional capability may be compromised
Solution Approach 1:
The body exhibits local quality variations with different portions having different structural characteristics. The body main portion has a simple cylindrical outer shape for weight reduction, while the swing shaft housing portion and spindle attachment portion have specialized structures optimized for their specific functions. This allows weight reduction in non-critical areas while maintaining strength where needed.
4Device complexity
If the swing shaft housing portion is disposed between outer and inner peripheral portions with through-holes, then the structure is simplified and weight is reduced, but manufacturing complexity may increase
Solution Approach 1:
The swing shaft housing portion serves multiple functions: it houses the swing shaft that swings the forming roller, provides structural support between outer and inner peripheral portions, and incorporates through-holes for component insertion. This multi-functionality reduces the need for separate components while maintaining manufacturability through standard machining operations.
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 achieves a stronger, lighter, and more compact capping head with improved manufacturing ease and reduced contamination risk, enhancing production efficiency and maintaining biasing member performance.
Implementation Method 1
a biasing member that biases the cam follower and the forming roller toward a radially inner side via the swing shaft
Data Source
AI summary
The capping head body is a body of a capping head used for the capping head that attaches a cap having a topped cylindrical shape to a mouthpiece portion of a can having a bottomed cylindrical shape, the capping head body including: a body main portion having a cylindrical shape; a spindle attachment portion disposed inside the body main portion and attached to a spindle; and a swing shaft housing portion disposed between an outer peripheral portion and an inner peripheral portion of the body main portion, in which the swing shaft housing portion is disposed around a periphery of the spindle attachment portion, and has a through-hole into which a swing shaft that swings a forming roller toward a peripheral wall of the cap is inserted, and the through-hole penetrates the body main portion in an up-down direction.