Spinning Pack Heat Conduction Structure for Uniform Melt Spinning
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Solution Overview
Problem
Existing melt spinning devices face inefficiencies in heat transfer from the heated box to the spinning pack, leading to uneven heat distribution and potential quality issues in the yarn due to uneven temperature distribution.
Innovation Solution
A melt spinning device with a heat conduction mechanism featuring a separated member, such as transferring blocks, that forms a heat conduction path from the heated box to the spinning pack, ensuring even heat transfer and contact across the spinning pack's circumference, using materials with high thermal conductivity and incorporating inclined surfaces for adjustable contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If heat is transferred via an air layer between the heated box and spinning pack, then the structure is simple with a gap between components, but the heat transfer efficiency is low due to high heat resistance of the air layer
Solution Approach 1:
A heat conduction member is introduced as an intermediary component between the heated box and spinning pack. This member includes a heat conduction portion that contacts the spinning pack and a heat reception portion that contacts the heated box, forming a thermal bridge that overcomes the high heat resistance of the air layer while maintaining structural simplicity
Solution Approach 2:
The heat conduction member is divided into distinct functional portions: a heat conduction portion (first portion) that contacts the spinning pack and a heat reception portion (second portion) that contacts the heated box. This segmentation allows each portion to be optimized for its specific function while working together to improve overall heat transfer
2Loss of energy
If a ring-shaped heating block contacts the spinneret outer surface, then heat transfer efficiency improves, but uneven heat distribution occurs in the circumferential direction due to partial contact
Solution Approach 1:
The heat conduction portion is divided into multiple independent heat conduction sections arranged circumferentially around the spinning pack. Each section independently contacts the spinneret outer surface, ensuring comprehensive and uniform heat distribution across the entire circumference, eliminating the partial contact problem
Solution Approach 2:
Multiple heat conduction sections are strategically positioned at different circumferential locations to provide localized heat conduction where needed. This ensures that heat is distributed uniformly across the entire spinning pack circumference, with each section contributing to the overall thermal equilibrium
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
Enhances heat transfer efficiency, maintains consistent spinneret temperature, and improves yarn quality by ensuring uniform heat distribution, reducing temperature fluctuations and assembly complexity.
Implementation Method 1
a heat conduction mechanism including a separated member which is able to make contact with an outer circumferential surface of the spinning pack inserted into the concave portion, and one or more members which include at least the separated member and form a heat conduction path from a wall surface defining the concave portion in the heated box to the outer circumferential surface of the spinning pack
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
An object of the present invention is to improve the efficiency in transferring heat from a heated box to a spinning pack and to suppress the heat transfer to the spinning pack in the circumferential direction of the spinning pack from becoming uneven. A melt spinning device 1 includes a cylindrical spinning pack 2 including a spinneret 21, a heated box 3 including a concave portion 32 into an internal space of which the spinning pack 2 is inserted and which is open downward, and a heat conduction mechanism 4 including a separated member 42 which is able to make contact with an outer circumferential surface of the spinning pack 2 inserted into the concave portion 32 and which is separated into plural members with respect to a circumferential direction of the spinning pack 2. When the spinning pack 2 is inserted into the concave portion 32, members which include at least the separated member 42 and which are included in the heat conduction mechanism 4 form a heat conduction path from a wall surface defining the concave portion 32 in the heated box 3 to an outer circumferential surface of the spinning pack 2.