Sawblade Pulverizer Housing Recesses for Controlled Particle Size
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Solution Overview
Problem
Existing material pulverization technologies face challenges in controlling particle size and efficiently processing large logs without pre-cutting, often requiring additional classifiers and machining processes that are costly and time-consuming.
Innovation Solution
A pulverization apparatus featuring disc-shaped sawblades with cutting teeth and collecting notches, rotating within a stationary housing with recesses that redirect cut material for multiple cuts, allowing for precise control of particle size and enabling whole-log processing without pre-cutting, along with a method for manufacturing the housing using thin sheets to avoid complex machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional cutting methods are used to process whole logs, then the equipment complexity increases and pre-cutting is required, but the present invention enables direct pulverization of whole logs without pre-cutting
Solution Approach 1:
The sawblade is segmented into multiple cutting teeth distributed around its periphery, allowing simultaneous engagement with the log at multiple points. This segmentation enables the blade to handle whole logs directly without pre-cutting, as different teeth process different sections of the log concurrently, eliminating the need for complex pre-cutting equipment.
Solution Approach 2:
The invention transitions from linear sequential cutting to radial simultaneous cutting by arranging cutting teeth around the periphery of a rotating sawblade. This dimensional change allows the log to be processed in its entirety through a single rotational operation, eliminating the need for sequential pre-cutting steps and reducing equipment complexity.
2Productivity
If high-speed rotation is used to reduce particle size, then the cutting efficiency improves, but the manufacturing precision of the housing increases due to centrifugal forces
Solution Approach 1:
The housing features localized recesses positioned at specific locations to receive cut material from specific collecting notches. This local quality approach allows the housing to accommodate centrifugal forces at high rotation speeds while maintaining precise material collection, as each recess is strategically positioned to handle the dynamic trajectory of cut material under centrifugal influence.
Solution Approach 2:
The system is designed to operate dynamically at high rotation speeds, with the recesses and collecting notches configured to work together under centrifugal force. The dynamic design allows the housing to maintain functional precision during high-speed operation, as the recesses are positioned to intercept material following its centrifugal trajectory rather than attempting to constrain it statically.
3Manufacturing precision
If multiple cutting passes are implemented to control particle size, then the particle size control improves, but the loss of time increases due to repeated cutting cycles
Solution Approach 1:
The rotating sawblade continuously engages the log material with multiple cutting teeth in sequence, creating uninterrupted cutting action. As the blade rotates, material passes through multiple cutting zones in a continuous flow, achieving fine particle size control without discrete stopping and starting between cuts. This continuous action eliminates idle time between cutting passes while maintaining precise particle size control through multiple sequential cuts.
Solution Approach 2:
The log is fed into the pulverizer in a preliminary state ready for processing, and the rotating blade immediately begins multi-stage cutting. The continuous rotation ensures that material undergoes successive cutting actions without interruption, with each passing tooth contributing to progressive size reduction. This preliminary positioning and continuous action combination achieves fine particle control efficiently without time-consuming intermediate steps.
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 apparatus effectively reduces material to very small particles with controlled size, eliminates the need for classifiers, and simplifies the manufacturing process by using thin sheets to create the housing, reducing costs and complexity.
Implementation Method 1
When a collecting notch faces a recess, the cut material in the collecting notch is transferred to the recess by means of the centrifugal force
Data Source
Figure 1~1b
Figure 2
Figure 3
AI summary
The present invention relates to an apparatus (1) for pulverizing a material. The apparatus comprises a stationary housing (3) having an interior space and at least one interior wall facing the interior space. At least one sawblade (9) is disposed in the interior space and arranged rotatable with respect to the stationary housing (3) in a rotational direction (R). The at least one sawblade (9) is disc-shaped and has a periphery (12) provided with a plurality of cutting teeth (15) for cutting the material and a plurality of collecting notches (17) for collecting the cut material, an inlet opening (19) for feeding material to be pulverized to the interior space, and an outlet opening (21) for dispatching the pulverized material from the interior space. The interior wall (7) of the housing is provided with a plurality of recesses (23) facing the periphery (12) of the sawblade (9), arranged to receive the cut material from the collecting notches (17) of the sawblade (9), and to revert the cut material to the periphery (12) of the sawblade (9) so that the material will be cut multiple times before it is dispatched from the apparatus.