Counter-Rotating Drum Trimming Device for Plant Material
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Solution Overview
Problem
Traditional drum-type trimming machines for plant material are inefficient due to limited cutting areas, leading to longer processing times, clogging issues, and increased maintenance needs, resulting in higher costs and lower throughput.
Innovation Solution
A rotary trimming device with a counter-rotating central cylindrical drum and co-axial cylindrical shearing mechanism, featuring a plurality of cutting elements around the drum's outer surface, allowing for independent speed control and increased trimming efficiency through a larger radial surface interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single blade is placed adjacent to the drum in traditional drum trimming machines, then the device structure is simple, but the cutting area is limited and trimming efficiency is low
Solution Approach 1:
The single blade is segmented into multiple blades (first blade, second blade, third blade, fourth blade) arranged around the drum. Each blade is positioned at different angular positions (0°, 90°, 180°, 270°) to create multiple cutting zones, increasing the effective cutting area and trimming efficiency while maintaining manageable structural complexity
Solution Approach 2:
The cutting action transitions from a single-point contact at the drum tangent to a distributed multi-dimensional cutting surface. Multiple blades extend radially outward from the drum at different angular positions, creating a three-dimensional cutting envelope that processes material more efficiently throughout the drum volume
2Productivity
If the drum rotates at high speed to increase throughput, then productivity improves, but plant material is tumbled without being trimmed and clogging occurs
Solution Approach 1:
The multiple blades are positioned to create continuous cutting action throughout the drum rotation. As material is tumbled, different portions pass through different cutting zones at different times, ensuring that trimming action is continuous rather than intermittent, preventing material accumulation and clogging while maintaining high throughput
Solution Approach 2:
Different regions of the drum have specialized functions: the bottom region serves as a tumbling zone where gravity causes material to fall, while the tangent line regions with blades serve as cutting zones. This local differentiation ensures material is properly prepared for cutting and prevents clogging in any single area
3Manufacturing precision
If tighter tolerances are used for blade proximity to the drum to improve trim quality, then manufacturing precision improves, but machine cost increases significantly
Solution Approach 1:
The blades are made movable rather than fixed, allowing dynamic adjustment of blade-to-drum clearance. This enables the system to maintain high trim quality when needed while allowing larger average clearances, reducing manufacturing precision requirements and costs. The movable blades can be adjusted based on material type and desired output quality
Solution Approach 2:
The blade clearance parameter is made variable rather than fixed. By allowing adjustment of the distance between blades and drum surface, the system can optimize trim quality for different operating conditions without requiring consistently tight tolerances across all conditions, reducing overall manufacturing cost
4Productivity
If a single tangent line cutting interface is used, then the device structure is simple, but the cutting area is limited leading to longer processing times
Solution Approach 1:
The single tangent line cutting interface is segmented into multiple cutting interfaces distributed around the drum circumference. Four blades positioned at 0°, 90°, 180°, and 270° create four distinct cutting zones, effectively multiplying the cutting area and processing speed while maintaining a relatively simple overall device structure
Solution Approach 2:
The cutting interface expands from a one-dimensional tangent line to a multi-dimensional distributed surface. Blades extending radially at different angular positions create a three-dimensional cutting envelope that increases effective cutting area without proportionally increasing device complexity
Data Source
AI summary
The present disclosure is directed to an apparatus and related methods (i.e. utilities) for trimming plants, in particular, buds and flowers, to remove unwanted plant material. A typical application would be to process a plant to leave only trimmed buds and flowers for use in potpourri, fragrant sashes, or as a prelude to further processing of essential oils. The utilities enable faster and safer production of plant material than prior plant processing machines. The utilities employ a coaxial drum and cutting element that counter rotate. This coaxial cutting element typically includes a plurality of cutting elements, to create a plurality of cutting interface that shear unwanted plant material form plant material within the drum and then collect this debris though, for example, a vacuum system. The use of the counter-rotating cutting interfaces allows for multiplying the cutting interfaces over prior existing machines.