Damped Carding Element for Smaller Gap and Lower Vibration
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Solution Overview
Problem
The existing carding elements in cards and roller cards face issues with damage due to manufacturing tolerances and production conditions, leading to collisions between the carding element tips and the drum, which can result in component failure, necessitating an enlarged carding gap to prevent damage.
Innovation Solution
A carding element with a profile and base plate, featuring at least one cavity with a counterweight connected via a spring and/or damper, which influences the natural angular frequency, reducing vibration amplitude and preventing contact with the drum, allowing for a smaller carding gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the carding gap is reduced to improve carding quality, then carding quality is improved, but the risk of collision between carding element tips and drum increases
Solution Approach 1:
The patent applies beforehand cushioning by introducing a damping element between the carding element and the drum. This damping element is positioned in advance to absorb collision forces before they can cause damage. When collisions occur due to reduced carding gap, the damping element cushions the impact, preventing component failure while maintaining the small carding gap necessary for high carding quality.
2Reliability
If the carding gap is enlarged to prevent collisions, then component reliability is improved, but carding quality deteriorates
Solution Approach 1:
The damping element is installed beforehand to cushion any potential collisions. This allows the carding gap to be maintained at an optimal small size for quality carding, while the damping element provides a safety buffer that prevents damage from occasional collisions caused by fiber thickening or manufacturing tolerances.
3Stability of the object's composition
If fixed carding elements are used to maintain stable positioning, then positioning stability is improved, but vulnerability to collision damage increases
Solution Approach 1:
The damping element is integrated into the fixed carding element structure, positioned beforehand to cushion any collision forces. This allows the carding element to maintain its fixed, stable positioning while the damping element provides protection against collision damage from fiber thickening or manufacturing tolerances.
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 counterweight system effectively reduces vibration amplitude and time, preventing collisions and enabling a smaller carding gap, thus enhancing carding quality and preventing component damage.
Implementation Method 1
Each counterweight is connected to the carding element by means of a spring and/or a damper
Implementation Method 2
If the counterweight is connected to the carding element only by a damper, a damping-coupled system is created, which primarily reduces the amplitude of the oscillation
Implementation Method 3
When the carding element is loaded, it oscillates similarly to a single-mass oscillator. The counterweight arranged on the carding element exhibits the same behavior. According to the invention, both oscillations are superimposed, so that the oscillation of the carding element is reduced in terms of amplitude and duration
Data Source
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AI summary
The present invention relates to a carding element for a card or carding machine, having a profile with a base region or a base plate and a covering that is arranged thereon, wherein at least one cavity is arranged within the profile. According to the invention, at least one balancing weight (20, 20a, 20b) is arranged on or in the carding element, each balancing weight (20, 20a, 20b) being connected to the carding element by means of a spring (22) and/or a damper (23).