Ceramic Insert Fiber Guide Channel for Open-End Spinning
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Solution Overview
Problem
Existing fiber guide channel devices in open-end rotor spinning machines face challenges with fiber lodging and high tool costs due to die-casting manufacturing, and they are not optimally designed for all fiber materials, leading to surface quality issues and reduced service life.
Innovation Solution
A fiber guide channel device with a plastic body and a sleeve-like, highly abrasion-resistant ceramic insert that matches the clear cross-section of the fiber guide channel entrance, featuring a collar-like extension and wear-protected surface to prevent fiber lodging and ensure smooth pneumatic transport, while being cost-effective and durable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a die-cast part with ceramic insert is used for the fiber guide channel device, then wear resistance and service life are improved, but manufacturing cost and tool costs increase significantly
Solution Approach 1:
The patent replaces the expensive die-cast zinc or aluminum part with a plastic part that can be manufactured more economically. The plastic body serves as a cost-effective alternative to the traditional die-cast construction, reducing manufacturing costs while maintaining the functional requirements of the fiber guide channel device.
Solution Approach 2:
The patent combines plastic material for the main body with a ceramic insert for the fiber guide channel. This composite construction allows the plastic to provide the structural framework at lower cost, while the ceramic insert provides the necessary wear resistance and surface quality for fiber transport, optimizing both cost and performance.
2Duration of action of stationary object
If a ceramic insert is added to the fiber guide channel device, then wear resistance is improved, but device complexity increases
Solution Approach 1:
The fiber guide channel device is divided into two functional segments: a plastic body that provides the structural framework and a separate ceramic insert that provides the wear-resistant fiber guide surface. This segmentation allows each component to be optimized for its specific function and facilitates easier manufacturing and assembly compared to a monolithic die-cast part.
Solution Approach 2:
The ceramic insert acts as an intermediary element between the plastic body and the fibers. It provides the necessary wear-resistant surface for fiber transport while being integrated into the simpler plastic body structure, thus improving service life without requiring the complexity of die-cast manufacturing.
3Productivity
If the clear cross-section of the fiber guide channel is reduced in the entry area, then fiber transport efficiency is improved for cotton, but fiber lodging occurs with other materials like polyester
Solution Approach 1:
The ceramic insert provides a locally optimized surface quality in the fiber entry area. The smooth, wear-resistant ceramic surface maintains consistent cross-section geometry that prevents fiber lodging for various fiber materials including polyester, while still providing efficient fiber transport. The local quality of the ceramic surface compensates for the lack of cross-section reduction.
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 prevents fiber lodging, ensures long service life, and reduces manufacturing costs by using a ceramic insert that is resistant to wear and stress, maintaining high surface quality and efficient fiber transport across various fiber materials.
Implementation Method 1
a sliver temporarily stored in a sliver can is presented to a rotating opening roller, which combs the sliver into individual fibers
Implementation Method 2
The combed out individual fibers are then fed pneumatically via a so-called fiber guide channel to a spinning rotor
Implementation Method 3
a spinning rotor rotating in a rotor housing at high speed and continuously twisted in its rotor groove onto the end of a yarn leaving the spinning rotor
Implementation Method 4
the fiber guide channel device is provided with wear protection, that is, the die-cast parts are immersed in a nickel dispersion bath or the like
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The device has a fiber guide channel body (14) fixed in an opening roller housing. The body has a receiving opening (15) for a fiber guide channel insert (27) defining a central fiber guide channel (13) for pneumatically transporting individual fibers. The body is made of a plastics material. The insert is made of a highly abrasion-resistant material as a sleeve-like component fully closed in its annular extent. The fibers are combed by an opening roller from a feed sliver to a spinning rotor revolving at a high rotational speed in a negative pressure-loadable rotor housing.