Shredder Paddle Hardness for Blowing Wool Jam Prevention
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Solution Overview
Problem
Existing blowing wool distribution machines face difficulties in efficiently and easily handling compressed blowing wool, leading to potential jamming and inefficient expansion during distribution.
Innovation Solution
A machine with a chute and shredding chamber equipped with rotating shredders and an agitator, featuring paddle assemblies with a hardness of 60 A to 70 A Durometer to effectively shred and pick apart compressed blowing wool, preventing jamming and facilitating smooth distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If compressed blowing wool is fed directly into the distribution machine, then storage and transportation efficiency is improved, but the blowing wool jams within the shredder and expansion is inefficient
Solution Approach 1:
The blowing wool is pre-compressed into compact packages before distribution. This preliminary compression enables efficient storage and transportation, and the packages are then fed into the distribution machine where they are gradually expanded and shredded, preventing jamming while maintaining operational efficiency.
Solution Approach 2:
The shredder paddles are designed with variable spacing and adjustable speed rotation. The dynamic adjustment of paddle speed and spacing allows the system to handle compressed blowing wool packages effectively, gradually breaking them down without causing jams while maintaining high shredding efficiency.
2Productivity
If the paddles are made harder to improve shredding capability, then shredding efficiency is improved, but the paddles fail to grip the blowing wool and cause jamming
Solution Approach 1:
The shredder paddles feature localized varying hardness zones. The leading edges have softer material for gripping and initial breaking of the blowing wool, while the rear portions have harder material for sustained shredding capability. This local quality variation enables both effective gripping and efficient shredding without jamming.
Solution Approach 2:
The paddles are constructed from composite materials with different hardness levels in different sections. This composite structure allows the paddle to exhibit both soft gripping characteristics at the contact point and hard shredding characteristics in the body, resolving the contradiction between grip effectiveness and shredding capability.
3Productivity
If the shredder speed is increased to improve distribution rate, then productivity is improved, but the blowing wool is not properly shredded and causes jamming
Solution Approach 1:
The shredder operates with periodic variation in speed, alternating between higher speeds for rapid distribution and lower speeds for thorough shredding. This periodic action maintains high overall productivity while ensuring proper shredding quality at critical moments, preventing jamming caused by insufficient shredding.
Solution Approach 2:
The shredder speed is dynamically adjusted based on the feed rate and material conditions. The system automatically varies the rotation speed to optimize both distribution rate and shredding quality, maintaining high productivity while preventing jamming through adaptive speed control.
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 machine ensures easy operation by preventing jamming and ensuring efficient shredding and distribution of blowing wool, improving the overall efficiency of the insulation process.
Implementation Method 1
The paddles have a hardness within the range of 60 A to 70 A Durometer to better grip the blowing wool for shredding
Data Source
AI summary
A machine for distributing blowing wool from a bag of compressed blowing wool is provided. The machine includes a chute having an inlet end configured to receive the bag of compressed blowing wool. A shredding chamber is positioned downstream from the chute and configured to shred and pick apart the blowing wool. The shredding chamber includes a plurality of shredders configured for rotation. Each shredder includes a plurality of paddle assemblies mounted to a shredder shaft. Each paddle assembly has a plurality of paddles. The paddles have a hardness within the range of 60 A to 70 A Durometer to better grip the blowing wool for shredding and prevent jamming of the blowing wool within the shredder.