Carding Flat Bar Thermal Deformation Control
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Solution Overview
Problem
Existing carding technologies face challenges in maintaining a uniform carding distance over the working width due to deformation caused by heat generation during the carding process, leading to inconsistencies in fiber processing quality, especially under changing operating conditions.
Innovation Solution
Incorporation of Peltier elements on the flat bar to precisely control temperature and geometry, allowing for real-time adjustment of the carding distance by heating or cooling specific points, thereby compensating for thermal deformations and maintaining a constant carding gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the flat bar is used to dissipate heat during the carding process, then heat dissipation is improved, but the flat bar deforms due to thermal effects, causing non-uniform carding distance
Solution Approach 1:
The patent applies preliminary anti-action by pre-deforming the flat bar in the opposite direction of the expected thermal deformation during carding. The flat bar is manufactured with a predetermined curvature that compensates for the thermal expansion and deformation that occurs during operation, ensuring that the carding distance remains uniform even when heat is generated and dissipated during the carding process.
2Manufacturing precision
If pretensioning is applied to the flat bar to compensate for thermal deformation, then carding distance uniformity is improved, but the setting must be done before insertion based on experience, making exact adjustment difficult
Solution Approach 1:
The patent applies preliminary action by pre-setting the flat bar with a specific curvature and pretensioning during manufacturing. The flat bar is designed with predetermined geometric characteristics that automatically compensate for thermal effects during carding, eliminating the need for complex real-time adjustments or operator experience-based settings.
3Manufacturing precision
If external heating elements are used to pre-deform the flat bar, then targeted deformation is achieved, but the system has high inertia and requires increased energy supply at edge areas
Solution Approach 1:
The patent replaces complex mechanical heating and adjustment systems with a simplified approach. Instead of using external heating elements and complex energy supply systems, the flat bar is pre-formed during manufacturing with the exact curvature and pretensioning needed to compensate for thermal effects during carding, eliminating the need for active heating systems and complex energy distribution.
4Temperature
If the flat bar geometry is optimized for heat dissipation, then heat management is improved, but the carding distance becomes non-uniform under changing operating conditions
Solution Approach 1:
The patent applies parameter changes by carefully selecting and optimizing the geometric parameters of the flat bar during manufacturing. The flat bar is designed with specific curvature radii, thickness variations, and pretensioning forces that create a thermal compensation effect, allowing the carding distance to remain uniform across different operating conditions and heat generation levels.
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
Achieves rapid and precise control of the carding distance with an accuracy of 0.005 mm, ensuring consistent fiber processing quality even under varying load and climatic conditions, and adapting to changes in operating states.
Implementation Method 1
at least one Peltier element is provided on the flat bar
Data Source
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AI summary
The invention relates to a work element for a carder (1) comprising a card flat bar (20) and a card clothing element (23) fixed to the card flat bar (20), at least one Peltier element (30) being provided on the card flat bar (20). Heat is applied to at least one defined zone of the card flat bar (20) or extracted from at least one defined zone of the card flat bar (20) by means of the Peltier element (30).