Peripheral Rewinder Adjustable Fulcrums for Roll Diameter Adaptation
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Solution Overview
Problem
Traditional peripheral rewinder machines face difficulties in managing rolls with varying diameters, leading to issues such as large rolls escaping containment and small rolls becoming embedded, resulting in poor winding quality and energy wastage.
Innovation Solution
A rewinder machine with adjustable fulcrums, where the lower roller can move to vary the groove width and the presser roller oscillates to follow the roll's growth, allowing for a cradle adjustment to accommodate different diameters, and a concave plate extends to maintain contact with the roll, ensuring proper winding and extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rewinder machine uses fixed fulcrums for the winding rollers, then the structure is simple and stable, but it cannot adapt to rolls with varying diameters
Solution Approach 1:
The patent applies the dynamics principle by making the fulcrums of the winding rollers mobile rather than fixed. The first and second fulcrums can move along the first and second parallel shoulders respectively, allowing the roller positions to dynamically adjust according to the diameter of the roll being wound. This dynamic adjustment capability enables the machine to adapt to various roll diameters while maintaining a relatively simple structural design.
2Manufacturing precision
If the presser roller follows the roll growth by oscillating, then the winding quality is maintained, but the device complexity increases
Solution Approach 1:
The presser roller is designed with an oscillating mechanism that allows it to dynamically follow the growth of the roll during winding. The oscillation enables the presser roller to maintain optimal contact pressure and position as the roll diameter increases, ensuring consistent winding quality throughout the process while avoiding the need for complex active control systems.
Solution Approach 2:
The oscillating mechanism of the presser roller operates autonomously to adapt to roll growth, effectively making the system self-regulating. The mechanical oscillation automatically compensates for diameter changes without requiring external control intervention, maintaining winding precision through self-service adaptation.
3Ease of operation
If extreme speeds are used to extract small rolls from the rollers, then the extraction is effective, but energy is wasted and paper defects occur
Solution Approach 1:
By making the fulcrums mobile and the presser roller oscillating, the system dynamically adapts to different roll sizes and positions. This dynamic adjustment enables smooth extraction of small rolls at normal speeds by optimizing the geometric relationships between rollers, eliminating the need for extreme speeds and associated energy waste and paper defects.
4Adaptability or versatility
If the groove width between rollers is fixed, then the structure is simple, but it cannot accommodate different core diameters
Solution Approach 1:
The mobile fulcrums enable the groove width between rollers to dynamically adjust according to the core diameter being used. As the fulcrums move along the parallel shoulders, the effective groove width changes, allowing accommodation of various core sizes without requiring complex adjustable mechanisms or multiple fixed positions.
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
An improved peripheral rewinder machine (20) suitable for manufacturing rolls or logs (30) of tape-shaped material, comprising a pair of opposed and parallel shoulders (22) rotationally supporting rollers (24) for moving and tensioning the tape-shaped material (23) in the direction of winding rollers comprising an upper roller (25) or first winding roller, a lower roller (26) or second winding roller and a presser roller (28) or third winding roller, said rollers having axis of rotation perpendicular to said opposed and parallel shoulders (22), with the upper roller (25) and the lower roller (26) defining a groove for the passage of the tape-shaped material (23) and, together with the presser roller (28), a cradle for the winding of the roll or log (30), said rewinder machine characterised in that it comprises support means for the lower winder (26) and for the presser roller (28) translationally moved with respect to said parallel and opposed shoulders (22) to vary the position of the fulcrums or centres of rotation of said lower roller (26) and presser roller (28).