Spinning System Cooling Unit Temperature Control
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Solution Overview
Problem
Conventional spinning systems experience significant temperature decreases at the spinneret and ambient temperatures during maintenance, leading to degraded yarn properties and increased yarn disposal due to prolonged recovery times.
Innovation Solution
A spinning system with a moving cooling unit and a blower that suppresses temperature decreases by controlling cooling air supply and blowing air between the spinning beam and cooling unit, facilitating yarn threading and reducing temperature recovery time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cooling unit is lowered to form a gap for maintenance, then working space is ensured, but temperature at the spinneret and ambient temperature decrease significantly
Solution Approach 1:
A blower is introduced as an intermediary device to supply air that prevents the downward flow of cold air from the cooling unit toward the spinneret. This mediator air flow blocks the harmful temperature decrease while allowing the cooling unit to be lowered for maintenance, thus resolving the contradiction between maintaining working space and preserving temperature.
Solution Approach 2:
The blower supplies air in advance to counteract the harmful effect of cold air flow before it reaches the spinneret. By preliminarily introducing air flow in the opposite direction, the system prevents temperature decrease at the spinneret while the cooling unit is in the lowered maintenance position.
2Temperature
If cooling air supply is stopped during maintenance, then temperature decrease is suppressed, but yarn threading becomes difficult
Solution Approach 1:
The system applies different air supply conditions to different regions: the blower supplies air locally between the cooling unit and spinneret to prevent temperature decrease, while the cooling air supply to the spinning cylinder is stopped or reduced. This localized differentiation allows temperature maintenance without interfering with yarn threading operations.
3Temperature
If the cooling unit remains in position during maintenance, then temperature is maintained, but working space for maintenance is insufficient
Solution Approach 1:
The blower acts as a mediator that enables the cooling unit to move to the lowered maintenance position by preventing cold air flow toward the spinneret. This intermediary air supply resolves the contradiction by allowing the cooling unit to be repositioned for maintenance while maintaining temperature through the blower's counteracting air flow.
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 shortens the time for temperature stabilization at the spinneret and ambient temperatures, reducing yarn disposal and enhancing yarn quality by maintaining optimal conditions during maintenance.
Implementation Method 1
a blower configured to blow air toward between the spinning beam and the cooling unit in a direction intersecting a yarn path of the molten polymer spun from the spinneret
Implementation Method 2
configured to cool the molten polymer through the use of cooling air supplied from a periphery of the spinning cylinder
Data Source
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AI summary
A spinning system configured such that decrease in temperature at a spinneret and in ambient temperature around the spinneret can be suppressed is provided. Such a spinning system includes: a spinning beam 21 having a spinning pack 23 inserted therein including a spinneret 24 for allowing molten polymer P to be spun downward; a cooling unit 3 arranged below the spinning beam 21, including a spinning cylinder 31 extending in an up-and-down direction so as to surround the molten polymer P spun from the spinneret 24, configured to cool the molten polymer P through the use of cooling air CF supplied from a periphery of the spinning cylinder 31; an air cylinder 5 for causing the cooling unit 3 to move downward with respect to the spinning beam 21 so as to form a working space between the cooling unit 3 and the spinning beam 21; and a controller configured to exert control for stopping supply of cooling air CF to the spinning cylinder 31, or control for suppressing supply, to the spinning cylinder 31, of cooling air CF in amount in comparison with a state before spinning of the molten polymer P is stopped, at least when the cooling unit 3 having been caused to move downward with respect to the spinning beam 21.