Plant Shredder Grid Calibration Reducing Fine Sawdust
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Solution Overview
Problem
Existing branch chipping devices produce excessive fine sawdust, reducing yield and requiring frequent maintenance due to the production of uncalibrated particles.
Innovation Solution
A plant shredder with a rotating disc and a grid system that channels particles through a fixed blade and pick-up knife, utilizing a cylindrical grid to filter and calibrate wood chips, minimizing fine particle production and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed calibrating grid is used to screen particles, then particle calibration is improved, but fine sawdust production increases reducing yield
Solution Approach 1:
The calibrating grid is divided into multiple separate panels that can be independently positioned and adjusted. This segmentation allows particles to be gradually calibrated across multiple stages rather than forced through a single tight screen, reducing the generation of fine sawdust while maintaining calibration precision.
Solution Approach 2:
The grid panels are made movable and adjustable rather than fixed, allowing the calibration process to adapt to different particle sizes and calibration requirements. This dynamic adjustment capability enables optimization of the calibration process to minimize fine particle generation while achieving the desired calibration precision.
2Manufacturing precision
If a rotating calibrating plate with peripheral knife is used to reduce large particles, then particle calibration is improved, but device complexity and maintenance requirements increase
Solution Approach 1:
The complex rotating calibrating plate with peripheral knife is replaced by stationary grid panels. This extraction of the rotating mechanism simplifies the device structure while maintaining calibration functionality through the stationary grid system that screens and gradually reduces particle sizes.
Solution Approach 2:
Instead of using a rotating active element (peripheral knife on rotating plate) to calibrate particles, the invention inverts the approach by using stationary passive elements (fixed grid panels) that particles pass through. This inversion simplifies the mechanism while achieving the same calibration objective.
3Manufacturing precision
If multiple calibration stages are implemented, then particle calibration precision is improved, but device complexity increases
Solution Approach 1:
The calibration process is segmented into multiple sequential stages using separate adjustable panels, each with its own grid. This segmentation allows progressive calibration of particles through multiple screens of varying mesh sizes, achieving high precision while keeping each individual stage simple and modular.
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 solution effectively reduces fine sawdust production, improving the yield of calibrated chips and reducing maintenance needs by directing particles through a calibrated grid, resulting in better chip calibration with less energy expenditure.
Implementation Method 1
the peripheral opening of which faces the grid. This structure of the disc makes it possible to channel the trajectory of the majority of the chips or particles subjected to the centrifugal force
Data Source
AI summary
A plant shredder comprising a solid disc (12) rotatably housed in the casing, and equipped with at least one set of knives (19, 20) including first knives (19) raised on the face of the disc (12) and at least one second recovery knife (20) fixed near the periphery of the disc (12). The disc (12) has, outside the second knife (20) and within a shredding chamber, a screen (21) whose mesh sieves the particles, this screen (21) being moved outwards from the recovery knife (20) so as to define a space between them into which at least one fixed finger (22) carried by the front wall (2) penetrates to form a fixed blade crossed by the inner edge of the mesh of the screen (21) and by the recovery knife (20) before it passes in front of the particle outlet opening (10).