Magnetic Support for Core Winder Spindle Flexure
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Solution Overview
Problem
Core winders experience flexural deformations due to winding, cutting, and weight-related stresses, which affect the accuracy and stability of tube formation.
Innovation Solution
A magnetic support device is integrated to constrain the forming spindle, using a combination of magnets around the spindle and a fixed load-bearing structure to reduce flexural deformations without obstructing the continuous advancement of the tubular material, with the magnets arranged in various positions along the spindle to provide effective support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the forming spindle is supported in a cantilever fashion to allow continuous tube formation, then the ease of operation and productivity are improved, but flexural deformations occur due to winding, cutting, and weight-related stresses
Solution Approach 1:
The patent replaces traditional mechanical support structures with a magnetic field-based support system. Magnets are positioned around the forming spindle to create magnetic forces that counteract flexural deformations, eliminating the need for complex mechanical support mechanisms while maintaining continuous tube formation capability
Solution Approach 2:
The patent changes the physical state of support from mechanical contact to magnetic field interaction. By adjusting magnetic field strength and distribution through strategically positioned magnets, the system dynamically compensates for flexural deformations without altering the continuous operation mode
2Manufacturing precision
If magnetic support devices are added to reduce flexural deformations, then the manufacturing precision and spindle stability are improved, but the device complexity increases
Solution Approach 1:
The magnetic support system is segmented into multiple discrete magnets positioned at specific locations around the forming spindle. This segmentation allows targeted support at critical points where flexural deformations occur most, reducing the need for a comprehensive complex support structure while maintaining precision
3Manufacturing precision
If the spindle is constrained to reduce flexural deformations, then the manufacturing precision is improved, but the ease of operation may be affected
Solution Approach 1:
The magnetic field acts as an intermediary between the support structure and the forming spindle. This intermediary provides constraint forces without physical contact, allowing the spindle to rotate and advance continuously while magnetic forces counteract flexural deformations, thus maintaining both precision and ease of operation
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 magnetic support significantly reduces flexural deformations, enhancing the spindle's resistance to stresses and maintaining continuous tube formation without interrupting the process.
Implementation Method 1
a magnetic support device which limits the flexural deformations of this spindle
Data Source
Figure 1
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AI summary
The machine comprises a forming spindle (4), around which one or more strips (S1, S2) of web material are wound; a winding unit (5) to wind the strips of web material around the forming spindle and form therewith a tubular article (T); a cutting unit (21) to cut the tubular article into single tubes. The machine also comprises at least one magnetic device to support the forming spindle to re- duce the flexural deformations thereof.