Melt Spinning Heat Transfer Across Variable Gaps
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Solution Overview
Problem
The existing melt spinning devices face inefficiencies in heat transfer from the heated box to the spinning pack due to gaps between them, which are uneven in size and filled with air, leading to uneven temperature distribution and complications in maintenance.
Innovation Solution
The device incorporates a heat-transmission mechanism, such as plate springs or brush-shaped structures, that form a conductive path between the heated box and spinning pack, adapting to the gap size and facilitating efficient heat transfer while simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If heat is transferred from the heated box to the spinning pack via an air layer in the gap, then the structure is simple, but the heat transfer efficiency is low
Solution Approach 1:
A heat transmission mechanism is introduced as an intermediary component between the heated box and the spinning pack. This mechanism includes a heat conduction member that makes contact with both the heated box and the spinning pack, forming a heat conduction path that efficiently transfers heat across the gap, resolving the contradiction between structural simplicity and heat transfer efficiency.
2Loss of energy
If the gap size between the heated box and spinning pack is reduced, then heat transfer efficiency improves, but manufacturing precision requirements increase due to production errors
Solution Approach 1:
The heat transmission mechanism incorporates a deformation member that can elastically change its shape according to the gap size. This dynamic adaptation allows the mechanism to compensate for variations in gap size caused by manufacturing errors, maintaining effective heat conduction without requiring high manufacturing precision.
Solution Approach 2:
The deformation member changes its physical parameters (shape, contact pressure) based on the gap size. By adjusting these parameters dynamically, the system adapts to different gap conditions while maintaining efficient heat transfer, thus resolving the contradiction between heat transfer efficiency and manufacturing precision requirements.
3Loss of energy
If the heat-transmission mechanism is attached to the spinning pack, then heat transfer efficiency improves, but maintenance complexity increases due to detachment requirements
Solution Approach 1:
Instead of attaching the heat transmission mechanism to the spinning pack, the invention inverts the attachment arrangement by fixing the mechanism to the heated box. This allows the spinning pack to be easily detached for maintenance while the heat transmission mechanism remains in place, resolving the contradiction between heat transfer efficiency and maintenance ease.
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 improves heat transfer efficiency, reduces temperature unevenness, and simplifies maintenance by allowing easy detachment and cleaning of the heat-transmission mechanism.
Implementation Method 1
heat from the heated box is transferred to the spinning pack via an air layer at this gap between the heated box and the spinning pack. Because heat resistance of the air layer is relatively high, the heat from the heated box may not be sufficiently transferred to the spinning pack
Implementation Method 2
the heat-transmission mechanism includes the deformation member the shape of which is elastically variable in accordance with the size of the gap between the heated box and 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, regardless of the size of a gap between the heated box and the spinning pack. A melt spinning device 1 includes: a cylindrical spinning pack 2 including a spinneret 21; a heated box 3 including a concave portion 32 having the internal space into which the spinning pack 2 is inserted; and a heat-transmission mechanism 4 which is positioned at a gap between the wall surface defining the concave portion 32 and the surface of the spinning pack 2 when the spinning pack 2 is inserted into the concave portion 32. The concave portion 32 is open downward. The heat-transmission mechanism 4 includes plate springs 41 in each of which the shape is elastically valuable in accordance with the size of the gap. When the spinning pack 2 is inserted into the concave portion 32, each plate spring 41 forms a heat conduction path which reaches the surface of the spinning pack 2 from the wall surface defining the concave portion 32 in the heated box 3.