Tethered Closure Cutting With Synchronized Soft-Spindle Support
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Solution Overview
Problem
Existing methods for cutting 'tethered' closures for containers face issues such as increased wear on cutting apparatus components due to inconsistent blade interactions and the need for precise initial phasing during format changes, leading to reduced efficacy and increased maintenance.
Innovation Solution
A cutting method and apparatus where a spindle with a softer material portion coordinates its rotation and advancement to ensure the cutting blades consistently interact with the same zone, reducing wear and eliminating the need for initial phasing by using a mechanical or electronic control system to synchronize spindle movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the spindle is fed to the cutting device with fixed blades, then the cutting process can be performed, but the blades experience increased wear due to inconsistent interactions
Solution Approach 1:
The invention makes the previously stationary cutting blades dynamic by mounting them on the rotating spindle. The blades now rotate with the spindle and are fed to the closure in a coordinated manner, changing from a static cutting system to a dynamic one where both the spindle and blades move together, reducing inconsistent interactions and wear
Solution Approach 2:
The invention merges the cutting blades with the spindle by mounting them on the spindle's peripheral surface. This combination ensures that the blades and spindle move as a unified system, with the blades rotating together with the spindle and being fed in coordination, eliminating relative movement inconsistencies that cause wear
2Manufacturing precision
If precise initial phasing is required during format changes, then cutting accuracy can be maintained, but the complexity and time for format changes increases
Solution Approach 1:
The system performs self-phasing through the coordinated rotation of the spindle and feeding mechanism. The spindle's rotation automatically aligns the mounted blades with the closure in the correct sequence without requiring external phasing adjustments, allowing the system to self-adjust during format changes
3Productivity
If the spindle rotates and carries the closure to fixed blades, then cutting can be performed, but the blades interact inconsistently with the spindle material
Solution Approach 1:
The invention transforms the static fixed blades into dynamic blades that rotate with the spindle. This dynamic configuration ensures consistent interaction between the blades and the closure material throughout the rotation, eliminating the inconsistent interactions that occur with fixed blades
Solution Approach 2:
The cutting operation is divided into discrete blade engagements during spindle rotation. Each blade on the spindle's peripheral surface engages the closure in sequence during rotation, creating segmented, controlled cutting actions that are more consistent than continuous contact with fixed blades
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 minimizes wear on the spindle, enhances cutting efficiency, and simplifies format changes by eliminating the need for precise initial alignment, resulting in a more durable and efficient cutting process.
Implementation Method 1
the spindle comprises a portion made of a softer material than the blades so that during cutting the blades penetrate with a through cut the material of the closure and then sink into the softer portion of the spindle
Implementation Method 2
feeding the spindle that carries the closure to the cutting device is coordinated with rotation of the spindle so that the vertical or oblique blade, each time that the spindle is fed to the cutting device, always meets the same linear, vertical or oblique linear zone of the softer portion of the spindle
Data Source
AI summary
A cutting method and apparatus for closures of the “tethered” type are disclosed, in which a spindle that carries a closure is moved to a cutting device with one or more horizontal blades and at least one vertical or oblique blade. During cutting, the spindle rotates and the closure rolls on the cutting device. The spindle, which is fed several times to the cutting device carrying each time a different closure, comprises a portion made of a softer material than the blades so that during cutting the blades penetrate the material of the closure and then sink into the softer portion of the spindle. Feeding the spindle that carries the closure to the cutting device is coordinated with rotation of the spindle so that the vertical or oblique blade, each time that the spindle is fed to the cutting device, always meets the same zone of the softer portion of the spindle.