Destacker Wheel Slit and Inclined Surface for Narrow Flange Separation
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Solution Overview
Problem
Existing destacker wheels struggle to reliably engage and separate containers with narrow flanges that are stacked closely together, especially at high production speeds, due to the complexity and cost of synchronizing non-parallel axles.
Innovation Solution
A destacker wheel design featuring a carrying surface with an inclined surface and a slit orthogonal to the rotation axis, where the inclined surface's side surface diverges outward, allowing reliable engagement and separation of containers without tilting the axle, and a reciprocating movement for efficient container dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional destacker wheels are used with narrow flanged containers stacked closely, then container engagement becomes unreliable, but arranging axles at an angle increases device complexity and cost
Solution Approach 1:
The destacker wheel incorporates a localized engagement feature in the form of a radially arranged groove with an inclined surface. This groove is positioned at a specific location on the wheel perimeter to engage with the flange of containers. The groove geometry (inclined surface followed by a vertical section) is optimized locally to provide reliable engagement and separation of containers with narrow flanges, without requiring complex axle arrangements.
Solution Approach 2:
The destacker wheel rotates about a parallel axis while the groove dynamically engages and disengages from the container flanges during rotation. The inclined surface of the groove allows the flange to slide in during engagement, and the subsequent vertical section provides a lifting action that separates the container from the stack. This dynamic engagement mechanism enables reliable operation at high speeds with parallel axles.
2Productivity
If destacker wheel rotates faster for high production speed, then productivity increases, but separation reliability decreases for closely stacked containers
Solution Approach 1:
The destacker wheel provides periodic engagement and separation actions through its rotation. Each rotation brings the groove into contact with the flange of the lowermost container, performs the separation action, and then releases it. This periodic action allows the system to maintain high productivity while ensuring reliable separation at each cycle, as the groove geometry is designed to complete the separation motion within each rotation period.
Solution Approach 2:
The groove in the destacker wheel features a curved inclined surface that transitions into a vertical section. This curved geometry allows the groove to smoothly engage the flange and progressively lift it during rotation. The curvature enables the groove to maintain contact and control the container through the rotational motion, ensuring reliable separation even at high rotation speeds where inertial forces are significant.
3Loss of substance
If flange width is reduced to minimize packaging material, then material usage decreases, but destacker wheel engagement becomes difficult
Solution Approach 1:
The groove in the destacker wheel acts as an intermediary mechanism between the wheel and the container flange. Instead of requiring direct engagement between the wheel perimeter and the narrow flange, the groove serves as a mediating structure that can engage the flange with its inclined surface and provide mechanical advantage through its geometry. This intermediary groove enables reliable engagement of narrow flanges that would be difficult to grasp directly.
Solution Approach 2:
The groove introduces a radial dimension to the engagement mechanism. By arranging the groove radially with respect to the rotation axis and providing an inclined surface, the engagement action is distributed through both radial and tangential components during rotation. This dimensional approach allows the groove to effectively engage narrow flanges by utilizing the rotational motion to convert radial engagement into tangential separation force.
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
Enables high-reliability separation of containers with minimal flanges at high speeds using parallel axles, reducing mechanical complexity and cost while maintaining stable stack retention and minimizing vibrations.
Implementation Method 1
The flange is caught by the groove in the destacker wheel and as the destacker wheel rotates, the shape of the groove will direct the flange of the container away from the remaining stack of containers
Data Source
Figure 1~2
Figure 3~4
Figure 5~6b
AI summary
Destacker wheel for a denester where a stack of containers, each container having a flange along its perimeter, is to be destacked one by one, by rotating or partly rotating said destacker wheel about an axis parallel to said stack of containers, where said de- stacker wheel comprises: - a stack carrying surface for carrying said stack of containers, connected to - an inclined surface, where between the carrying surface and the inclined surface a slit orthogonal to the rotation axis is provided, said slit having a height in the direction of the rotation axis corresponding at least to the thickness of a containers flange, and - where an ejector surface follows below and at least partly behind the inclined surface in the direction of rotation, where said ejectors' surface commences with an edge, said edge arranged substantially radially with respect to the axis of rotation, where said edge is above the level of the slit, and - where the inclined surface has a side surface between said inclined surface and the slit, where said surface diverges outwards upwards from said slit relative to the axis of rotation.