Elastic Apron Shifting for Roller Abrion in Yarn Drafting
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Solution Overview
Problem
In yarn production, rollers coated with elastic material experience rapid abrasion due to fiber or yarn contact, leading to maintenance issues, quality deviations, and operational disruptions, particularly in compact ring spinning systems, where fibers passing through the same point cause significant deformation and abrasion on the top roller, necessitating frequent grinding and replacement.
Innovation Solution
A narrow, highly durable apron with a larger perimeter is applied to the top roller, mounted on a bearing unit with a stretching mechanism, allowing it to shift left or right, providing increased pressure on fibers and extending the abrasion period, while a clearer roller is positioned closer to the compactor to effectively collect stray fibers, preventing them from entering the yarn structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the top roller coated with elastic material is used for drafting and guiding fibers, then the yarn quality is improved, but the roller surface experiences rapid abrasion and deformation
Solution Approach 1:
The top roller is segmented into two functional parts: a durable metallic base roller and a replaceable elastic material apron. The apron can be detached and replaced when worn, separating the permanent structural component from the consumable functional layer, thus extending overall roller service life while maintaining yarn quality.
Solution Approach 2:
The hardness parameter of the elastic material is optimized to balance between providing sufficient drafting control for yarn quality and resisting abrasion. The apron material is selected with specific elastic properties that reduce wear while maintaining the necessary softness for fiber handling.
2Strength
If the top roller is pressed against the delivery drafting roller to compact fibers, then yarn strength is increased, but the roller contact point experiences intensive abrasion
Solution Approach 1:
The elastic apron acts as an intermediary layer between the metallic roller and the fibers. It provides the necessary compliance and pressure distribution for compacting fibers to increase yarn strength, while protecting the metallic roller surface from direct fiber contact and abrasion.
Solution Approach 2:
The elastic apron is designed as a consumable component that can be replaced periodically. It serves as a disposable protective layer that absorbs the abrasion damage, allowing the expensive metallic roller to be reused for extended periods without wear.
3Device complexity
If the clearer roller is positioned distant from the compactor, then the mechanism structure is simplified, but stray fibers cannot be effectively collected
Solution Approach 1:
The clearer roller is designed with rotational freedom on its axis, allowing it to dynamically adjust its position and orientation to optimally intercept stray fibers. This dynamic capability enables effective fiber collection without requiring complex fixed positioning mechanisms.
Solution Approach 2:
The clearer roller collects fibers not only in the primary horizontal plane but also in the vertical dimension by positioning itself to catch fibers falling at different heights. This multi-dimensional fiber collection capability improves yarn quality without adding complex horizontal positioning mechanisms.
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 solution reduces maintenance needs, minimizes yarn breaks and quality deviations, extends the lifespan of the top roller, and improves yarn quality by reducing abrasion and effectively removing stray fibers, resulting in more efficient and consistent production.
Implementation Method 1
rollers coated with elastic material are used either for drafting purposes or with the purpose of guiding the yarn
Implementation Method 2
The yarn, according to the place it is used either in fibre form or in its final form, contacts these rollers with a certain tension and it is exposed to drafting or guiding process via these rollers
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
The purpose of the invention is to reduce the abrasive impact of the fibre or the yarn on the rollers coated with elastic material, which are used for drafting and guiding purposes in yarn production techniques, and thus keep the operating conditions and yarn quality parameters constant. The invention, in order to reduce the abrasive impact of the fibre on the Top rollers (9) coated with elastic material especially in the mechanical ring compact yarn production among the yarn production techniques, is an apron (17) cladding method, over the Top roller (9) and the bearing guide arms (15.2) connected to a bearing body (15.1) found on the bearing unit (15) placed on the pressure arm (3), in a way that it would cover these (9, 15.2) together, and it is characterized in that; it comprises the operation steps of stretching the aprons (17) by application of tension via a tension component (22) and, while the fibre drafting operation continues, the bearing unit (15) carrying the aprons (17) being shifted in the horizontal plane in certain intervals. This increases the usage and operation period in consideration with the systems in which only the Top roller (9) is used.