Thread Traversing Device Temperature Control for Bobbin Quality
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Solution Overview
Problem
Textile machines producing cross-wound bobbins often experience quality defects such as shoulders or rings at the bobbin flanks after long production interruptions, due to changes in mechanical properties of the thread laying unit caused by cooling, leading to unusable bobbins.
Innovation Solution
A thread traversing device with a temperature control system, including a heating unit and control unit, that heats the thread laying unit to its pre-interruption temperature before restarting the winding process, ensuring consistent mechanical properties and preventing quality defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the textile machine is switched off for extended periods, then energy consumption is reduced and maintenance can be performed, but quality defects such as ridges or rings appear on the bobbin flanks due to cooling of the yarn laying unit
Solution Approach 1:
The heating unit is activated before the winding process is resumed to preheat the yarn laying unit to its operating temperature. This preliminary action prevents thermal shock and ensures that the mechanical properties of the yarn laying unit are restored to their original state, thereby avoiding quality defects like ridges or rings on the bobbin flanks.
Solution Approach 2:
The temperature of the yarn laying unit is changed from a low state (after cooling during interruption) to a high operating state by activating the heating unit. This parameter change restores the mechanical properties of the yarn laying unit, ensuring consistent laying width and speed, and prevents quality defects upon resumption of production.
2Manufacturing precision
If the heating unit is activated to maintain yarn laying unit temperature, then manufacturing precision is improved, but energy consumption increases
Solution Approach 1:
The heating unit is activated periodically - specifically, only when the textile machine is switched off for extended periods and before resumption of the winding process. This periodic activation maintains the yarn laying unit at the appropriate temperature when needed, ensuring bobbin quality, while avoiding continuous energy consumption during normal operation or short interruptions.
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 effectively prevents quality defects like shoulders or rings by maintaining the thread laying unit's properties, allowing for defect-free cross-wound bobbin production after extended interruptions.
Implementation Method 1
a temperature control system with a heating unit (73) having a control unit (72), wherein the heating unit (73) serves to heat the thread laying unit (7)
Data Source
Figure 1
AI summary
The invention relates to a method for producing a cross-wound bobbin at a work station of a textile machine using a thread changing device, and a thread changing device for traversing a thread (3) at a work station (1) of a textile machine producing cross-wound bobbins (2), comprising a thread laying unit (7) having a thread guide (5) movable between a first end position and a second end position, and an electric motor drive connected to the thread laying unit (7) for oscillating adjustment of the thread guide (5) between the first and second end positions.In order to provide a yarn changing device and a method for producing a cross-wound bobbin (2) at a work station (1) of a textile machine using a yarn changing device which enables the completion of defect-free cross-wound bobbins (2) even after a longer interruption of production, it is provided that the yarn changing device has a temperature control system with a heating unit having a control unit for heating the yarn laying unit (7).