Carding Flat With Electrode Clothing Tips
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Solution Overview
Problem
Current carding processes in cotton processing face challenges in simultaneously achieving effective dirt separation and fiber orientation without causing fiber damage, as high dirt separation rates often result in excessive fiber loss and damage due to deep carding.
Innovation Solution
A device and method utilizing a flat with electrode clothing tips connected to a high-voltage source to create an electric field that attracts and separates dirt and short fibers from the fibrous material without direct contact, allowing for a clear separation between cleaning and carding processes, thereby minimizing fiber damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high dirt separation rate is achieved through deep carding in revolving flats, then cleaning effectiveness is improved, but fiber damage and loss of good fibers increase
Solution Approach 1:
The invention divides the carding process into two distinct functional zones: a cleaning zone with strong electric fields for dirt and short fiber removal, and a carding zone for fiber parallelization. This segmentation allows each zone to optimize its function without compromising the other, achieving high dirt separation without excessive fiber loss.
Solution Approach 2:
Different regions of the flat are equipped with different properties: the cleaning zone has closely spaced clothing points connected to high voltage for strong electric fields, while the carding zone has differently configured clothing points. This local differentiation enables zone-specific optimization for either cleaning or carding functions.
2Manufacturing precision
If mechanical friction is increased to separate dirt particles, then cleaning effectiveness is improved, but fiber damage increases
Solution Approach 1:
The invention replaces the traditional mechanical friction-based cleaning mechanism with an electric field-based separation mechanism. Clothing points connected to high voltage create electric fields that attract and remove dirt and short fibers without the need for intense mechanical friction, thereby reducing fiber damage.
Solution Approach 2:
The invention changes the physical parameter used for separation from mechanical force to electric field strength. By applying high voltage to alternating clothing points, strong electric fields are generated that selectively attract impurities based on their dielectric properties, providing a gentler yet effective cleaning action.
3Productivity
If cleaning and carding are performed simultaneously in the same zone, then process efficiency is improved, but cleaning effectiveness and fiber orientation are compromised
Solution Approach 1:
The flat is divided into distinct cleaning and carding zones with different clothing point configurations. The cleaning zone uses closely spaced points with high voltage for dirt removal, while the carding zone uses differently configured points for fiber parallelization. This spatial segmentation allows both functions to occur simultaneously but in separate areas, maintaining effectiveness of both processes.
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 enables effective dirt and short fiber separation with reduced fiber damage, as the electric field orthogonal to the fiber material's surface deflects impurities without contacting the fibers, maintaining the integrity of good fibers and optimizing the carding process.
Implementation Method 1
At least some of the clothing tips are designed as pairs of electrodes and are connected to a high-voltage source, with an electric field being built up in each case between two clothing tips forming a pair of electrodes
Implementation Method 2
An electrical voltage is applied to individual clothing points and an electric field is built up at least in partial areas of the flat clothing between two adjacent clothing points
Data Source
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AI summary
The invention relates to a device for removing dirt and short fibers on a carding machine, to the method therefor, and to a flat for use in the device. The device has at least one flat comprising a flat bar having a flat clothing having clothing tips and a drum having a drum clothing, wherein the flat clothing is arranged opposite the drum clothing at a distance. At least some of the clothing tips are designed as electrode pairs and connected to a high-voltage source, wherein an electric field is built up between every two clothing tips forming an electrode pair.