Rotational Assemblies for High-Speed Transfer of Discrete Articles
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Solution Overview
Problem
Existing transfer assemblies for discrete articles, such as absorbent products, face challenges in achieving high-speed transfers without causing misalignment, folding, or disconfiguration due to inadequate speed matching, arcuate transfer surface limitations, and inefficient fluid control systems, leading to faulty product formation.
Innovation Solution
A rotation assembly with a torque transmitting mechanism that allows transfer members to rotate between positions, using a track and follower mechanism to maintain constant distance from carrier members, and a fluid system for independent pressure control on transfer surfaces to manage discrete articles effectively during transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If related art transfer assemblies are run at higher speeds (over 1,000 discrete articles per minute), then productivity increases, but discrete articles may fold over themselves inappropriately or not transfer properly, resulting in disconfigured products
Solution Approach 1:
The transfer member incorporates a radially movable portion that can dynamically adjust its position relative to the rotation axis. This radial movement allows the transfer surface to maintain optimal proximity to both carrier members during high-speed operation, preventing article folding and misconfiguration while enabling increased transfer speeds beyond 1,000 articles per minute
Solution Approach 2:
The transfer member is divided into distinct functional portions: a radially movable portion that adjusts position and a rotation assembly that enables angular repositioning. This segmentation allows independent optimization of each component's function, with the radially movable portion handling proximity control and the rotation assembly handling orientation control, thereby maintaining article integrity at high speeds
2Ease of operation
If arcuately shaped transfer surfaces are used for pick-up, then discrete article pickup is improved, but after rotating 90 degrees, the distal cross machine direction edges are not in close proximity to the second moving carrier member, resulting in poor control during transfer
Solution Approach 1:
The transfer member includes a rotation assembly that enables the transfer surface to rotate between different angular positions. This dynamic rotation allows the transfer surface to be oriented optimally for pickup from the first carrier member, then rotated to present the correct edge profile to the second carrier member, solving the limitation of fixed arcuately shaped surfaces
Solution Approach 2:
The transfer member is designed to perform multiple functions: it can pickup articles with an arcuate profile, rotate 90 degrees to change orientation, and then present a different edge profile to the second carrier member. This multi-functionality allows a single transfer member design to handle both pickup and controlled transfer operations effectively
3Manufacturing precision
If flat transfer surfaces are used, then the leading and trailing edges can be positioned close to the moving carrier member, but the mid portion has a large gap, causing faulty transfers and folded edges
Solution Approach 1:
The radially movable portion of the transfer member can dynamically adjust its radial position during rotation. This allows the mid portion of the transfer surface to move radially inward to maintain consistent proximity to the carrier members throughout the transfer cycle, eliminating the large gap problem while preserving the edge positioning accuracy of flat surfaces
Data Source
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AI summary
The present disclosure is directed to a rotation assembly for a transfer member of a transfer assembly. The rotation assembly comprises a torque transmitting assembly comprising input and output members, a link comprising a first end operably coupled to the input member and a second end comprising a follower member, a shaft comprising a first end operably coupled to the output member and a second end engaged with a portion of the transfer member, and a track. The follower is movably engaged with the track and circumnavigates about a path in correspondence with the track. The follower member is moved radially relative to a first rotation axis by the track as it circumnavigates about the path to transmit torque through the torque transmitting assembly and to the shaft. The torque causes a portion of the transfer member to rotate between a first position and a second position.