Carding Doffer Cleaning to Prevent Fleece Dust Contamination
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Solution Overview
Problem
Existing devices for forming fleeces of fibres by carding struggle to produce high-quality, uniform fleeces with minimal holes due to contamination from dust and impurities during the carding process, which affects the homogeneity and integrity of the fleece.
Innovation Solution
The device incorporates prevention means, such as screens or directional rotation of cleaner flywheels, to prevent dust and impurities from escaping towards the stripper roller, using airtight rollers and directional alignment of components to direct impurities back to the main carding drum or enclose them within a housing, thereby maintaining fleece quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cleaner flywheel is used to remove dust and impurities from the doffer, then the fleece quality is improved, but dust and impurities may escape towards the stripper roller and contaminate the fleece
Solution Approach 1:
A housing is introduced as an intermediary structure between the cleaner flywheel and the stripper roller. This housing encloses the cleaner flywheel and prevents dust and impurities removed from the doffer from escaping towards the stripper roller, thereby protecting the fleece from contamination while maintaining the cleaning function
Solution Approach 2:
The harmful dust and impurities are extracted from the doffer surface by the cleaner flywheel and directed away from the stripper roller through the housing structure, separating the cleaning function from the potential contamination path
2Manufacturing precision
If the cleaner flywheel removes dust and impurities from the doffer, then the fleece homogeneity is improved, but the complexity of the device increases
Solution Approach 1:
The housing structure serves multiple functions: it encloses the cleaner flywheel, directs cleaned fibres towards the output belt, and prevents dust and impurities from escaping towards the stripper roller. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity
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 approach ensures the production of very uniform fleeces with minimal holes by preventing contamination from impurities, resulting in higher-quality fibres.
Implementation Method 1
a cleaner flywheel working in conjunction with the, or at least one, doffer doffer to remove dust and impurities
Implementation Method 2
prevention means are arranged to prevent dust and impurities removed from the doffer by the cleaner flywheel from escaping in the direction of the associated stripper roller
Data Source
AI summary
Devices and methods for forming by carding one or more fleece(s) of fibres including a main carding drum supplied with raw fibres, one or more doffer cylinder(s) capable of removing the fibres worked on the carding drum and an associated stripper roller to strip the fleece(s) of fibres formed on the or each doffer and deposit them on one or more output belts. The device and methods also include at least one comb-cleaner flywheel capable of interacting with at least one doffer cylinder to remove dust and impurities therefrom, characterised in that it/they is/are fitted with prevention means which are configured so as to prevent the dust and impurities removed from the comb by the cleaner flywheel from escaping in the direction of the associated stripper roller.