Melt Spinning Device Adjustable Aperture for Gas Exhaust
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Solution Overview
Problem
Existing melt spinning devices face issues with yarn breakage due to gas stagnation below the spinneret, particularly in tubular coolers, and the existing exhaust systems are cumbersome and difficult to adjust for varying yarn production conditions.
Innovation Solution
A melt spinning device with an adjustable aperture area between the spinneret and the cooler, featuring a movable adjusting member and multiple openings at equal intervals, allowing for easy adjustment of airflow to prevent gas stagnation and ensure even cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a gap is formed between the heating body and the cooler to enable gas exhaust, then gas stagnation is reduced, but the polymer discharging surface is easily cooled causing yarn breakage
Solution Approach 1:
The patent applies local quality by providing cooling wind only at specific locations (through nozzles) rather than uniform cooling. The cooling wind nozzles are strategically positioned to cool the yarn after it leaves the spinneret, while the spinneret itself remains relatively warm to prevent polymer solidification issues. This localized cooling approach allows gas exhaust while preventing excessive cooling of the polymer discharging surface.
Solution Approach 2:
The patent introduces an intermediary structure (the cooler with cooling wind nozzles) that mediates between the heating body and the environment. The cooler acts as an intermediary that provides controlled cooling to the yarn stream while maintaining a gap for gas exhaust, thus resolving the contradiction between gas exhaust and polymer surface cooling.
2Object-generated harmful factors
If exhaust amount adjusting pipes are attached around the dam to control gas exhaust, then gas stagnation is managed, but the device complexity increases and operation becomes cumbersome
Solution Approach 1:
The patent extracts the gas exhaust function from complex adjustable piping systems and integrates it into the basic structure of the cooler. The cooling wind nozzles are built into the cooler body, eliminating the need for separate exhaust amount adjusting pipes and dams. This simplifies the device while maintaining the ability to control gas exhaust through the cooling wind system.
Solution Approach 2:
The cooling wind nozzles serve multiple functions: they provide cooling to the yarn, create negative pressure for gas exhaust, and eliminate the need for separate exhaust adjustment mechanisms. This multi-functionality reduces device complexity while achieving both cooling and gas management objectives.
3Adaptability or versatility
If multiple exhaust amount adjusting pipes of different types are prepared for different yarn spinning conditions, then exhaust amount can be adjusted for various conditions, but the ease of operation decreases due to frequent replacements
Solution Approach 1:
The patent implements a dynamic adjustment system where the cooling wind nozzle opening area can be continuously varied during operation. The nozzle structure allows for adjustable opening areas through mechanical means (such as movable parts or variable geometry), enabling real-time adaptation to different yarn spinning conditions without replacing components. This provides both versatility and ease of operation.
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 adjustable aperture area system reduces yarn breakage by effectively managing airflow and gas exhaustion, allowing for precise adjustment according to spinning conditions, thereby enhancing the stability and quality of yarn production.
Implementation Method 1
a cooling cylinder provided below the spinning unit to cool the yarn spun out from the spinneret
Implementation Method 2
In the cooler, yarns are cooled by applying cooling wind to the yarns spun out from the spinneret from around the yarns
Implementation Method 3
gas including a sublimable material generated in spinning stagnates at a position immediately below the spinneret
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
A melt spinning device in which the aperture area between a spinneret and a cooler is adjustable by a simple operation is provided. A melt spinning device includes a spinning unit 2 to which a spinning pack 12 having a spinneret 13 is attached, and a cooling cylinder 21 provided below the spinning unit 2 to cool a yarn Y (filaments f) spun out from the spinneret 13. The melt spinning device further includes an exhaust ring 16 provided between the spinning unit 2 and the cooling cylinder 21 and in which openings 16a are formed at intervals in the circumferential direction, and an adjustment ring 26 attached to be movable relative to the exhaust ring 16 and adjusting the aperture area of each of the openings 16a.