Open-End Spinning Box With Protected Yarn End Preparation
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Solution Overview
Problem
Existing spinning boxes for semi-automatic open-end spinning machines lack a service unit for optimal yarn end preparation, leading to compromised spinning rotor drive life and unsuitable re-spinning processes.
Innovation Solution
A spinning box with a yarn end preparation unit and a yarn insertion recess, allowing for protected yarn end preparation within the box, independent of a service unit, and without compromising the spinning rotor drive, featuring a detachable attachment for easy access and a cleaning system to manage dirt particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If yarn end preparation is performed using the spinning rotor itself in semi-automatic machines, then yarn end preparation is possible without a service unit, but the service life of the spinning rotor drive is shortened
Solution Approach 1:
The invention separates the yarn end preparation function from the spinning rotor drive by introducing a dedicated yarn end preparation unit. This unit includes a preparation roller and guide elements that are mechanically independent from the spinning rotor, allowing yarn end preparation without engaging the spinning rotor drive mechanism.
Solution Approach 2:
The yarn end preparation function is extracted from the spinning rotor system and placed into a separate, dedicated unit. This extracted function can operate independently using its own drive mechanism, preventing wear on the spinning rotor drive while maintaining yarn end preparation capability.
2Reliability
If a service unit is used for yarn end preparation in semi-automatic machines, then optimal yarn end preparation is achieved, but the machine complexity increases
Solution Approach 1:
Instead of a full service unit, the invention implements a localized, simplified yarn end preparation system with a preparation roller and guide elements positioned specifically where yarn end preparation is needed. This local solution provides adequate preparation quality without the complexity of a complete service unit.
3Ease of operation
If the yarn exit opening is positioned on the housing side, then yarn discharge is simplified, but yarn contact with housing edges increases causing hairiness
Solution Approach 1:
The invention introduces a yarn insertion recess as an intermediary structure between the yarn exit opening and the housing edge. This recess provides a smooth transition path for the yarn, eliminating direct contact with housing edges that cause hairiness, while maintaining the simplified yarn discharge arrangement.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a spinning box (1) for an open-end spinning machine with a fiber tape inlet for feeding a fiber tape to a dissolving unit, which can be arranged in a dissolving unit receptacle of the spinning box (1), and a yarn exit opening (4) through which a spun yarn (2) produced from the fed fiber tape can be discharged from the spinning box (1). In order to enable the preparation of a spun yarn end for a spinning process, in particular protected from the ambient air, and furthermore particularly suitable for semi-automatic open-end spinning machines, it is provided that the spinning box (1) is designed to accommodate a yarn end preparation unit for preparing a spun yarn end, wherein the yarn end preparation unit can be arranged opposite the yarn exit opening (4) for the mutual transfer of the spun yarn (2).