Moving-Roller Rewinding for Automatic Shaft Switching
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Solution Overview
Problem
The inefficiency of manual switching between shafts during the rewinding process of tape-like strip materials in battery manufacturing, which occupies large space and complicates control due to the need for turret rotation and multiple turrets for unwound strips.
Innovation Solution
A rewinding apparatus with a moving roller and switching mechanism that allows automatic switching between shafts without changing the shaft positions, using a moving roller to drive the strip between conveyance paths and incorporating a cutting unit for seamless rewinding, reducing space occupation and simplifying control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual switching between shafts is used during rewinding, then the structure is simple, but the switching efficiency is low and labor-intensive
Solution Approach 1:
The patent implements automatic switching between shafts by making the shafts rotatable relative to each other, transforming the static manual switching process into a dynamic automated system. The shafts can rotate to bring different winding positions into alignment with the conveyance path, enabling continuous automated operation without manual intervention while maintaining structural simplicity.
Solution Approach 2:
The switching mechanism uses the strip material itself as the driving force for shaft rotation. As the strip is conveyed and wound, it automatically triggers the shaft rotation to switch between winding positions, eliminating the need for separate switching actuators or complex control systems.
2Productivity
If turret rotation is used to switch between shafts, then automatic switching is achieved, but the space occupation increases
Solution Approach 1:
Instead of using a large turret structure that rotates to bring different shafts into position, the patent segments the switching function into individual shafts that can rotate independently or in a simplified sequence. This eliminates the need for a large-radius turret arc, significantly reducing the space occupation while maintaining automated switching capability.
Solution Approach 2:
The patent changes the switching mechanism from a radial turret rotation (requiring large horizontal space) to a more compact configuration where shafts rotate within a smaller footprint, potentially utilizing vertical space or compact horizontal arrangements to achieve the same switching function with reduced overall space occupation.
3Productivity
If multiple turrets are used for unwound strips, then all strips can be processed simultaneously, but the control complexity increases
Solution Approach 1:
The patent designs a single multi-functional switching mechanism that can handle multiple strips sequentially or in parallel through coordinated shaft rotation. Instead of requiring separate control systems for multiple independent turrets, one switching mechanism performs the function of multiple turrets by rotating different shafts to service different strips, thereby reducing control complexity while maintaining processing capacity.
Solution Approach 2:
The patent combines the switching functions of multiple turrets into a single integrated switching mechanism. By merging the control of multiple shafts under one system, the patent reduces the overall control complexity while maintaining the ability to process multiple strips simultaneously or sequentially through coordinated operation of the shared switching mechanism.
4Productivity
If shaft positions are changed during switching, then automatic shaft changeover is achieved, but the movement space requirement increases
Solution Approach 1:
The patent implements shaft rotation rather than shaft translation for switching between winding positions. By rotating the shafts in place rather than moving them to different positions, the system achieves automated switching while minimizing the movement space required, as rotation occurs within the existing shaft mounting footprint.
Data Source
AI summary
This application discloses a rewinding apparatus and a rewinding method. The rewinding apparatus is configured to rewind a strip. The rewinding apparatus includes a rewinding mechanism and a switching mechanism. The rewinding mechanism includes two shafts that are opposite to each other along a first direction and spaced out. The two shafts are configured to rewind the strip along different conveyance paths separately. The switching mechanism includes a moving roller. The moving roller is configured to drive the strip to switch from one shaft to another shaft so that the strip switches from one conveyance path to another conveyance path. The rewinding apparatus and rewinding method disclosed in this application achieve high space efficiency and high switching efficiency.