Counter-Rotating Rollers for Continuous Plant Defoliation
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Solution Overview
Problem
Existing methods for removing leaves from plant stalks, such as tobacco, are either expensive and time-consuming when done manually or complex and costly when using machines.
Innovation Solution
An apparatus comprising a plurality of counter-rotating rollers and a guide for guiding plant material, allowing leaves to be pulled away from the stalk as it moves relative to the rollers, enabling continuous processing without halting the machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual methods are used to remove leaves from plant stalks, then labor flexibility and leaf classification capability are improved, but processing time and cost increase significantly
Solution Approach 1:
The apparatus segments the continuous plant stalk into individual plant units using a cutter, allowing each plant to be processed independently through the defoliation system. This segmentation enables the mechanical system to handle multiple plants simultaneously while maintaining classification capability through separate collection chutes for different leaf types.
Solution Approach 2:
The mechanical apparatus performs multiple functions: it cuts plant tops, removes leaves through friction between rollers, and classifies leaves into different types using multiple collection chutes. This multi-functionality replaces the need for manual classification while maintaining productivity through continuous automated processing.
2Productivity
If complex machines are used for defoliation, then processing speed and automation are improved, but device complexity and cost increase
Solution Approach 1:
The apparatus applies local quality by using pairs of rollers with different surface characteristics - some rollers have rough surfaces for gripping leaves, others have smooth surfaces for guiding. This localized differentiation of roller properties enables effective leaf removal without requiring complex mechanical systems throughout the entire apparatus.
Solution Approach 2:
Instead of using complex mechanical grippers or cutters to remove leaves, the invention inverts the approach by using friction between rotating rollers to pull leaves off the stalk. This passive friction-based mechanism is simpler than active mechanical removal systems while achieving the same defoliation effect.
3Productivity
If continuous processing is implemented, then productivity is improved, but the ability to halt and reposition plants for processing worsens
Solution Approach 1:
The infeed mechanism positions plants in the correct orientation before they reach the defoliation rollers. This preliminary positioning ensures that plants are properly aligned for continuous processing through the apparatus, eliminating the need to halt and reposition plants during operation.
Solution Approach 2:
The apparatus maintains continuous operation by processing plants sequentially through cutting, defoliation, and collection without halting. The rollers continuously rotate to remove leaves, and multiple collection chutes simultaneously receive different leaf types, enabling uninterrupted productive action throughout the entire processing cycle.
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
Facilitates efficient and cost-effective removal of all leaves from plant stalks, including different leaf types, without the need for manual separation, by continuously processing multiple plants simultaneously.
Implementation Method 1
at least one pair of counter-rotating rollers configured to pull leaves away from a plant stalk as it moves relative to the plurality of rollers
Data Source
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AI summary
An apparatus and method are provided for processing plant material to remove leaves from a plant stalk, comprising a guide means (30) configured to guide movement of the plant material relative to a plurality of rollers (10), the plurality of rollers comprising one or more counter-rotating rollers (11) for pulling leaves away from a plant stalk.