Melt Spinning Godet Deflection Angle Optimization
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Solution Overview
Problem
Existing devices for melt spinning and winding synthetic threads face challenges in minimizing thread friction and tension differences during the transition from treatment devices to winding machines, often resulting in impermissible thread tensions and complications in guiding threads without contact.
Innovation Solution
The device employs a godet system with a maximum deflection angle of 15° and a surface roughness of 0.2 μm to 0.8 μm to guide threads directly into the winding units, eliminating the need for additional thread guide means and minimizing friction, while guide rollers with orthogonal axes and groove-shaped tracks facilitate smooth thread deflection and guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional thread guide means are used to guide threads from treatment device to winding machine, then thread distribution is enabled, but thread friction and tension increase
Solution Approach 1:
The patent removes additional thread guide means from the system, using only the godet system itself to guide and distribute threads. By eliminating intermediate guides, the thread path is simplified, reducing friction and tension while maintaining distribution capability through the godet's rotational geometry
Solution Approach 2:
The godet system performs multiple functions simultaneously: it guides threads, distributes them to different winding stations, and controls thread spacing. This multi-functionality eliminates the need for separate thread guide means, reducing overall system complexity and thread friction
2Ease of operation
If threads are guided with larger deflection angles, then thread distribution to different positions is achieved, but thread tension increases due to contact friction
Solution Approach 1:
The patent optimizes the deflection angle parameter to a maximum of 15 degrees, balancing thread distribution capability with tension control. This specific angular parameter minimizes friction-induced tension while still enabling effective thread routing to different winding positions
Solution Approach 2:
The godet system uses curved surfaces and smooth rotational geometry to guide threads through deflection angles. The curved contact surface distributes normal forces more evenly, reducing peak friction forces compared to sharp angular guides
3Volume of moving object
If treatment distance between threads is reduced for compact design, then machine size is minimized, but thread guidance without contact becomes more difficult
Solution Approach 1:
The godet system simultaneously achieves compact thread spacing and contactless guidance by using the rotating cylinder surface as both the spacing mechanism and the guidance element. Threads are spaced by their positions on the godet circumference and guided by the smooth surface, eliminating the need for separate guidance structures that would increase size
4Force
If deflection angles are limited to 15° maximum, then thread tension is minimized, but thread distribution flexibility is reduced
Solution Approach 1:
The patent transitions from planar thread routing to three-dimensional distribution using the godet's rotational dimension. Threads are distributed not only by deflection angle but also by their circumferential positions on the rotating godet, enabling flexible routing to multiple winding stations while maintaining small deflection angles
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
This approach allows for efficient thread distribution with minimal friction and consistent thread tension across winding stations, enabling compact designs and reliable thread guidance with commercially available machines, even for multiple threads.
Implementation Method 1
the surface of the run-off godet has a roughness in the range of a mean roughness value of 0.2 μm to 0.8 μm
Data Source
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AI summary
Disclosed is an apparatus for melt spinning and winding synthetic threads, comprising a spinning device (27), a treatment device (34), and a winding machine (35). The treatment device is provided with a take-off godet (14) for guiding the threads before the threads are fed and distributed to a plurality winding points (1.1 to 1.5) in the winding machine. The take-off godet (14) is disposed above the winding machine and guides the threads on the circumference such that the threads run parallel next to each other. The take-off godet is arranged transversal to a winding spindle (6.1), above the winding machine. The winding machine is equipped with a plurality of top thread guides (3.1 to 3.5) which are mounted upstream of the winding points and are located on a vertically extending feeding plane. In order to be able to guide the threads with as little friction as possible, the top thread guides of the winding points are mounted downstream of the take-off godet directly in the thread path in such a way that a maximum deflection angle of 15° is not exceeded when the threads are deflected onto the feeding plane.