Flexible Enclosure Compactor with Dynamic Stroke Control
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Solution Overview
Problem
Existing waste compactors require high-strength bags and significant power input, leading to high costs and bulky storage due to the need for robust construction to withstand compaction forces.
Innovation Solution
A compactor design featuring opposed rams and a flexible enclosure with sensors that dynamically adjust compacting press stroke length and pressure based on detected panel deflection and bag bulging, allowing for the use of lighter bags and reduced power input, while maintaining effective waste compaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high-strength reinforced compactor bag is used to withstand compaction forces, then the bag can reliably contain waste during pressing, but the bag becomes expensive and bulky to store before use
Solution Approach 1:
The compaction system is divided into two functional parts: a flexible bag for containment and a rigid enclosure frame for structural support. The frame is segmented into panels that can deflect independently, distributing mechanical loads away from the bag and allowing the bag to be made of lighter, less expensive material while maintaining reliability during compaction.
2Strength
If a rigid enclosure is provided to contain the bag and withstand compaction forces, then the structure can handle high pressing forces, but the overall height and lateral dimensions increase
Solution Approach 1:
The enclosure panels are designed to be flexible rather than rigid, allowing them to deflect outward during compaction. This flexibility enables the enclosure to withstand high pressing forces without requiring excessive structural thickness or larger dimensions, reducing the overall footprint while maintaining strength.
3Productivity
If high compaction forces are applied continuously, then waste compaction efficiency is maximized, but power consumption increases significantly
Solution Approach 1:
The compaction process uses periodic cycles of high-force pressing followed by pause intervals. During pauses, the enclosure panels gradually return to their original positions, and the system prepares for the next cycle. This periodic action maintains compaction effectiveness while reducing average power consumption compared to continuous high-force operation.
Solution Approach 2:
Sensors detect panel deflection and bag bulging in real-time, providing feedback to the control system. The controller dynamically adjusts pressing force and stroke length based on this feedback, applying high forces only when needed to achieve compaction goals, thereby optimizing power consumption while maintaining productivity.
4Ease of manufacture
If a simple enclosure design is used, then manufacturing cost and complexity are reduced, but the enclosure cannot adequately contain the bag under compaction forces
Solution Approach 1:
The enclosure uses flexible panels that can be manufactured more simply than rigid structural components. These panels derive their strength from flexibility and controlled deflection rather than thick rigid construction, reducing manufacturing complexity while maintaining containment reliability through the combined system of flexible bag and supportive frame.
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 the use of lighter, less expensive bags and reduces the overall size and power requirements of the compactor, achieving efficient waste compaction with lower energy consumption and simpler maintenance.
Implementation Method 1
a compacting press (301) including a plunger (308) and a hydraulic actuator (307) arranged to drive the plunger in a reciprocating motion along a longitudinal axis for compacting material into the bag
Implementation Method 2
sensors arranged to detect a parameter of physical movement of the enclosure or a bag
Data Source
Figure 1~2
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Figure 5~6
AI summary
A compactor (300) has a plunger housing (301) with a door (302) for insertion of waste. The plunger presses waste into a bag (B) on a pallet (P) within an enclosure (305) with panels (311, 312, 313) and a pair of panels in the form of doors (306) at the rear, which open to allow access by a truck to remove the pallet P with the bag in place on it. Side panels (311, 312), are joined along their lower edges to a floor panel 313, the side panels supporting the end panels (306) at vertical hinges (314). There is resilience due to the ability of the various panels to move, in which each side pan is cantilevered about the corner at which it is joined to the floor panel (313), and the end panels (306) can rotate about the relevant vertical axis of the hinges (314).As the plunger presses axially to compact waste within a bag (B) when the bag approaches being full, the resilient panels deflect so that they exert reaction forces on the return stroke of the plunger, thereby helping to achieve a uniform distribution of waste throughout the bag, and reducing power consumption. The controller may dynamically reduce plunger stroke length in response to sensing of panel deflection above a threshold.