Fiber Bundle Condensing Device Asymmetric Suction Slit Design
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Solution Overview
Problem
Conventional fiber bundle condensing devices for spinning machines suffer from fiber clogging due to fibers getting caught in the suction slit, which degrades yarn quality.
Innovation Solution
The device features guide members with suction slits and holes of varying widths, creating a gap that prevents fibers from entering and accumulating, ensuring smooth fiber guidance and maintaining yarn quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the suction hole of the suction pipe and the suction slit of the guide member have the same shape and dimension, then the alignment is precise and easy to manufacture, but fibers get caught on the suction slit causing clogging
Solution Approach 1:
The suction hole and suction slit are designed with different shapes and dimensions, specifically making the suction slit narrower than the suction hole. This asymmetric design prevents fibers from entering the gap between the guide member and suction pipe, thereby preventing clogging while maintaining manufacturing feasibility
Solution Approach 2:
The guide member is designed with a stepped structure where the width of the suction slit varies along its length. The upstream portion has a narrower width to prevent fiber entry, while the downstream portion has a wider width to ensure proper fiber guidance and suction efficiency
2Strength
If the suction slit is positioned close to the hole wall surface, then the gap is minimized for structural integrity, but fibers easily enter and get caught causing accumulation
Solution Approach 1:
The suction slit is designed with a narrower width compared to the suction hole, creating an asymmetric configuration that positions the gap away from the suction slit. This prevents fibers from entering the gap while maintaining structural integrity of the assembly
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
Prevents fiber clogging by positioning the gap away from the suction slit, allowing for efficient fiber condensation and maintaining yarn quality, with reduced precision requirements in processing the slit walls.
Implementation Method 1
a suction pipe (17) disposed downstream of the draft device (10), and an air-permeable apron (18) wound on the suction pipe (17), and condenses fiber bundles stretched by the draft device (10)
Data Source
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AI summary
A fiber bundle condensing device (11) of a spinning machine includes a suction pipe (17, 80) and a guide member (40, 60, 86) having a guide portion (41, 61, 87). The fiber bundle condensing device (11) condenses a fiber bundle (F). The suction pipe (17, 80) has a suction hole (30, 31, 81) extending from an upstream side to a downstream side in a moving direction of the fiber bundle (F). The guide member (40, 60, 86) has a suction slit (44, 45, 64, 65, 88) formed in the guide portion (41, 61, 87) and aligned with the suction hole (30, 31, 81). A width of the suction hole (30, 31, 81) and a width of the suction slit (44, 45, 64, 65, 88) are different at least on the upstream sides of the suction hole (30, 31, 81) and the suction slit (44, 45, 64, 65, 88).