Rotating Plate Coating With Spherical Elevations
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Solution Overview
Problem
Existing turntables for spinning machines, particularly draw frames and cards, experience high friction with various fiber materials, leading to fiber entrainment and damage due to their honeycomb structures, which were originally designed for specific types of polyester, and are ineffective with modern polyester and other materials like cotton.
Innovation Solution
A turntable with a partial coating of spherical, irregular elevations on its underside, which reduces friction by minimizing contact area and utilizing a separate cover for the coating to simplify manufacturing and maintenance, potentially made from chromium or chromium alloys for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If honeycomb elevations are used on the turntable surface, then friction reduction is achieved for specific polyester types, but fiber entrainment and damage occur with modern polyester and other fiber materials
Solution Approach 1:
The invention changes the geometric parameters of the surface elevations from honeycomb-shaped to spherical with specific diameter ratios (0.5-2.0). This parameter modification transforms the contact mechanics between the turntable surface and sliver, reducing friction while preventing fiber entrainment across diverse fiber materials including modern polyester and cotton
Solution Approach 2:
The invention applies a coating with spherical elevations only to specific regions of the turntable surface where contact with the sliver occurs. This localized treatment optimizes friction reduction exactly where needed without affecting other functional areas of the turntable
2Ease of manufacture
If coating is applied directly on the base body, then manufacturing cost and time are reduced, but the coating area is limited and manufacturing complexity increases
Solution Approach 1:
The invention segments the turntable into a base body and a separate cover component. The coating with spherical elevations is applied to the cover rather than the base body, allowing independent manufacturing and coating processes. This segmentation simplifies the overall manufacturing by enabling specialized coating application on a smaller, more manageable component
Solution Approach 2:
The cover is prepared with the spherical elevation coating in advance before being assembled to the base body. This preliminary coating action allows for optimized coating application conditions and simplifies the final assembly process, as the coated cover can be directly attached to the base body without requiring additional coating steps
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 spherical, irregular elevations on the turntable coating significantly reduce friction, preventing fiber drag and enabling the use with diverse fiber materials while saving manufacturing costs and simplifying the production process.
Implementation Method 1
The spherical irregular bumps reduce the contact area between the coating and the sliver since only an upper portion of the spherical bump comes in contact with the sliver and exerts little friction on the sliver
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a rotating plate of a spinning machine, in particular a drawframe or carding machine, for depositing a fiber band in a can, comprising a base body (2) and a sliver channel (3) arranged in the base body (2). According to the invention, it is proposed that, for the intended use of the rotating plate (1), the side of the rotating plate (1) facing the can has at least partially a coating (6) with a spatial structure of spherical, irregular elevations (11).