Bead Feeder With Vacuum-Assisted Metering for Cigarette Filters
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Solution Overview
Problem
Existing bead feeder technologies are inefficient and prone to operational issues when serially delivering spherical beads to the interior spaces of plug-space-plug cigarette filters, particularly in ensuring precise and high-speed delivery of beads between cellulose acetate plugs.
Innovation Solution
A bead feeder system comprising a rotating bead supply wheel with radially extending passageways, a feed plate, a metering plate, and a bead transfer wheel, utilizing vacuum assistance for efficient bead alignment and transfer, ensuring each bead is delivered to a specific cavity between cellulose acetate plugs in cigarette filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional bead feeder technologies are used to deliver beads to cigarette filter cavities, then the structure may be simple, but the delivery efficiency and precision are insufficient
Solution Approach 1:
The bead feeder is divided into multiple functional modules: a bead supply wheel with radially extending passageways for bead transport, a feed plate with pockets for bead reception, a metering plate with openings for precise bead dosing, and a transfer wheel for bead delivery to cavities. Each module performs a specific function in the bead delivery sequence, enabling high-speed operation while maintaining structural organization
Solution Approach 2:
The feed plate and metering plate act as intermediary components between the bead supply wheel and the final delivery point. The feed plate receives beads from the supply wheel and transfers them to the metering plate, which then delivers them to the transfer wheel. This multi-stage intermediary system enables precise control over bead delivery timing and positioning
2Productivity
If high-speed bead delivery is implemented, then productivity improves, but operational reliability and precision may deteriorate
Solution Approach 1:
The bead delivery system operates through periodic rotational cycles of the supply wheel, feed plate, metering plate, and transfer wheel. Each component rotates in synchronization, creating periodic bead transfer events at specific locations. The metering plate rotates slightly slower or faster than the feed plate to ensure alignment and transfer of beads occurs only once per revolution, preventing multiple beads from being delivered to the same cavity
Solution Approach 2:
Vacuum assistance is used to replace purely mechanical bead transfer mechanisms. Vacuum ports in the feed plate and metering plate create negative pressure to secure beads during rotation and ensure precise positioning. This pneumatic element enhances reliability by preventing bead misalignment or premature release during high-speed operation
3Manufacturing precision
If precise bead positioning is achieved through multiple plates and wheels, then delivery precision improves, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into single components to reduce overall system complexity. The supply wheel combines bead storage and radial transport functions. The feed plate combines bead reception, vacuum holding, and transfer functions. The metering plate combines precise positioning and single-bead release functions. This functional merging reduces the number of separate components while maintaining precision
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 system enables high-speed, trouble-free, and precise delivery of beads to the desired locations within cigarette filters, enhancing the efficiency and reliability of the bead feeding process during filter production.
Implementation Method 1
Vacuum may be used to draw and hold the beads in the pockets of the transfer wheel until the beads are released from the wheel.
Data Source
AI summary
A bead feeder serially delivering beads to a downstream location comprises a bead supply wheel connected to rotate about a vertical axis. The bead supply wheel includes a bead supply bowl and a plurality of radially and outwardly extending bead passageway connected to rotate with the bowl and dimensioned to receive a single line of beads. A plurality of openings in the bead supply bowl is spaced around a lower portion thereof with the openings in alignment with the radially and outwardly extending passageways each of which has an outer exit end. A metering plate is connected to rotate about the same vertical axis as the bead supply wheel, and metering plate has a plurality of equally spaced apart openings directly below the outer ends of the passageways for receiving the lowermost beads in the passageways. The metering plate rotates at a slightly slower or slightly faster speed than the bead supply wheel so that vertical alignment of an outer exit end of a particular passageway and an opening in the metering plate only occurs once for each revolution of the bead supply wheel. A drop off is provided for the removal of beads away from the metering plate.