Multi-Shaft Rewind Drum for Continuous Strip Switching
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Solution Overview
Problem
Conventional rewind systems can only rewind one roll of strips at a time, leading to inefficiency and the need for multiple devices, which occupy space and increase labor intensity.
Innovation Solution
A rewind system with a conveyor assembly and a rewind apparatus featuring a drum and multiple shafts that allow simultaneous rewinding of strips on different paths, switching strips between shafts without halting, using auxiliary rollers for support and a cleaning assembly to prevent sagging and debris, and a cutter for seamless transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional rewind system is used to rewind strips, then the rewinding process is simple and reliable, but only one roll of strips can be rewound at a time, leading to low productivity
Solution Approach 1:
The patent combines multiple shafts (first shaft, second shaft, third shaft, fourth shaft) onto a single drum, enabling simultaneous rewinding of multiple strips. The conveyor assembly also integrates multiple conveyance paths (first path, second path, third path, fourth path) to transport multiple strips concurrently, thereby improving productivity without requiring separate rewind systems for each strip.
Solution Approach 2:
The rewind system is segmented into distinct functional components: the drum with multiple shafts for rewinding, the conveyor assembly with multiple paths for transport, switching mechanisms for path redirection, and a cutter for separation. This segmentation allows each component to specialize in its function while working together to achieve efficient multi-strip rewinding.
2Productivity
If multiple rewind devices are used to rewind multiple strips simultaneously, then productivity increases, but space occupation increases and device complexity increases
Solution Approach 1:
The patent merges multiple rewind functions into a single integrated device. By mounting multiple shafts on one drum and providing multiple conveyance paths in the conveyor assembly, the system achieves multi-strip simultaneous rewinding within a compact footprint, eliminating the need for multiple separate rewind devices and reducing space occupation.
Solution Approach 2:
The system utilizes vertical stacking and radial arrangement of shafts on the drum to accommodate multiple strips in a limited horizontal space. The conveyor assembly employs multi-level conveyance paths that utilize vertical space, allowing multiple strips to be processed simultaneously without proportionally increasing the horizontal footprint.
3Productivity
If strips are switched between shafts during drum rotation, then continuous rewinding is achieved and productivity improves, but the switching mechanism increases device complexity
Solution Approach 1:
The switching mechanism is designed to be dynamic rather than static. The conveyor paths can be reconfigured to connect to different shafts based on the rotation position of the drum, enabling automatic switching as the drum rotates. This dynamic adaptation allows continuous operation without manual intervention or complex mechanical switching devices.
Solution Approach 2:
The system uses the natural rotation of the drum to facilitate automatic switching. As the drum rotates, the conveyance paths automatically align with different shafts in sequence, and the cutter automatically separates strips at appropriate intervals. This self-service mechanism eliminates the need for external switching devices or manual operation, reducing overall system complexity.
4Manufacturing precision
If auxiliary rollers and cleaning assemblies are added to maintain strip quality, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The auxiliary rollers and cleaning assemblies are integrated into the existing conveyance paths and shaft structures. These components perform their functions (supporting strips, preventing sagging, removing debris) as part of the normal operation flow, without requiring separate dedicated systems. The cutter also operates automatically during the rewinding process, eliminating the need for separate quality control stations.
Data Source
AI summary
A rewind system includes a conveyor assembly and a rewind apparatus. The conveyor assembly is configured to convey strips along a plurality of paths each configured to convey at least one strip. The rewind apparatus includes a drum and a plurality of shafts. The strip on each path is rewound around one of the shafts. Two adjacent shafts do not take up strips simultaneously. The drum is configured to rotate around an axis of the drum. The drum is configured to switch each of the strips on different paths from one shaft onto another shaft after the drum rotates by a predetermined angle.