Grinding Machine Spiral Blade Arrangement Prevents Wood Squashing
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Solution Overview
Problem
Current grinding machines face challenges in efficiently grinding hard materials like wood due to the aligned blade arrangement, which causes squashing, and the accumulation of chopped material leading to jams and operational inefficiencies.
Innovation Solution
The grinding machine features two rotating feed rollers with push tines, a cutting rotor with angularly offset blades, and two grinding strips with perpendicular teeth, designed to push and cut material efficiently, preventing squashing and eliminating the need for a reserve chamber by ensuring continuous processing and expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If aligned blades are used in the grinding machine, then the structure is simple, but the wood is squashed during grinding increasing resistance and reducing efficiency
Solution Approach 1:
The patent applies asymmetry by arranging blades in a spiral pattern rather than in straight aligned rows. This asymmetric spiral arrangement allows the blades to engage the wood fibers in a sequential cutting action rather than a crushing action, significantly reducing resistance and improving grinding efficiency while maintaining structural simplicity
2Quantity of substance
If a reserve chamber is added to store chopped material, then material accumulation is managed, but the chamber fills up causing jams and requiring stopping of the grinding process
Solution Approach 1:
The patent extracts the reserve chamber from the system entirely. Instead of storing chopped material in a chamber that can fill up and cause jams, the design allows material to be continuously expelled through the spiral blade action and feed rollers, eliminating the storage chamber and ensuring continuous reliable operation without jams or need to stop the grinding process
3Productivity
If high speed grinding is implemented to process large volume material, then productivity increases, but the effort required from the towing vehicle increases and jamming risks increase
Solution Approach 1:
The patent applies preliminary action through the spiral blade arrangement that progressively cuts and propels material forward before it reaches the grinding zone. This preliminary cutting action reduces material resistance and prepares the material for efficient grinding, enabling high-speed operation with reduced towing effort and minimized jamming risks
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
This design reduces effort and jamming risks, allowing for efficient grinding of hard materials without stopping, as the angular blade configuration and dual grinding strips ensure smooth operation and material expulsion, enhancing productivity and reducing maintenance.
Implementation Method 1
two rotating feed rollers... each feed roller comprises a plurality of push tines... configured to push, through the opening of the inner grinding region, material to be ground
Implementation Method 2
a cutting rotor... comprising a rotating cylinder... and a plurality of pairs of blades... evenly arranged in at least one helical direction... configured to cut and drive the material
Implementation Method 3
two grinding strips... each grinding strip comprises at least one row of grinding teeth... oriented in the longitudinal direction
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Grinding machine (1) for agricultural material, comprising two rotating feed rollers (2) having a plurality of push tines (21); a cutting rotor (3), located in the inner region for grinding material, comprising a rotating cylinder (31), with a plurality of pairs of blades (32, 33) arranged in a helical direction defined by a longitudinal direction; and two grinding strips (4, 5) oriented in the longitudinal direction, wherein each grinding strip (4, 5) comprises at least one row of grinding teeth (41, 51) aligned in the longitudinal direction. The two feed rollers (2) are configured to push, through the opening of the inner grinding region, material to be ground. The cutting rotor (3) is located in an input direction of the material to be ground, and is configured to receive said material, pushed by the feed rollers (2) and to cut and drive the material received by the feed rollers (2) towards the two grinding strips (4, 5). Each pair of blades (32, 33) comprises a first blade (32) and a second blade (33), angularly offset from the first blade (32), with respect to the rotating cylinder (31).