Vegetative Material Particle Size Control via Ball Mill Impact
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Solution Overview
Problem
Existing methods for processing vegetative material, such as slash and agricultural waste, struggle to produce uniformly sized particles due to issues with sticky substances like pine sap, which often halt cutting blades and result in inconsistent processing outcomes.
Innovation Solution
A method involving loading vegetative material into a cylindrical plastic tube with a free metal rod and rotating it to form particles of a selected size, utilizing a ball mill for efficient processing, allowing for uniform particle formation even with the presence of pine sap and other liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cutting blades are used to process vegetative material, then material can be chopped and divided, but sticky substances like pine sap cause blades to halt and particles become non-uniform
Solution Approach 1:
The patent replaces the traditional mechanical cutting blade system with a impact-based size reduction system. Material is fed into a chamber where it undergoes repeated impact, compression, and friction between particles and chamber walls, eliminating the need for cutting blades that are susceptible to clogging by sticky substances like pine sap.
Solution Approach 2:
The patent changes the fundamental processing mechanism from cutting (blade-based) to impact and compression (chamber-based). By altering the physical parameters of the processing method - using confined space, rotational motion, and particle-on-particle impact - the system achieves size reduction without the reliability issues of blade clogging.
2Reliability
If larger cutting blades and significant power are used for chipping and chopping, then tolerance to sticky substances improves, but particle size uniformity and fineness deteriorate
Solution Approach 1:
The patent employs a chamber that segments the size reduction process into multiple stages of impact and compression. Material undergoes repeated size reduction cycles as it tumbles within the chamber, progressively achieving uniform fine particles without requiring large cutting blades.
Solution Approach 2:
The rotational motion of the chamber creates periodic impact and compression cycles on the material. This repeated periodic action gradually reduces particle size to a uniform fine consistency, replacing the single-pass cutting action of traditional chippers.
3Productivity
If traditional shredding mills are used, then processing can be performed, but pine sap release halts cutting blades and prevents consistent nutrient release
Solution Approach 1:
The patent replaces the blade-based mechanical cutting system with a chamber-based impact and compression system. This substitution eliminates blade clogging by pine sap while maintaining processing capability, and produces uniform particles that enable consistent nutrient release for agricultural applications.
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 achieves the production of uniformly sized, finely divided particles that are suitable for applications requiring consistent nutrient release and high surface contact, with liquids being homogeneously infused into the particles, suitable for uses like fertilizer, soil amendment, and absorbent.
Implementation Method 1
rotating the cylinder about the cylindrical axis for a chosen period of time, wherein particles of the vegetative material having a selected particle size are formed
Implementation Method 2
loading a chosen quantity of the vegetative material into a cylindrical plastic tube having a cylindrical axis disposed approximately horizontally, and containing at least one free metal rod; and rotating the cylinder about the cylindrical axis
Data Source
AI summary
An apparatus and method for generating a chosen, relatively uniform size of particles having a dry-to-the-touch feel and a pleasant odor from chipped slash or other vegetative material is described. When pine sap and/or other liquids are present in the starting materials, the teachings of the present invention permit the generation of particulates into which such substances are substantially uniformly absorbed. The process of the present invention has been successfully applied to chipped, live trees, dried tree materials, branches, needles, pine cones, hay, flowers, grass, berries, and shrubs.