Fiber Stretching Device Eliminates Lower Belts
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Solution Overview
Problem
Conventional fiber stretching devices for roving frames face difficulties in adjusting and replacing lower belts due to their high number and complexity, leading to issues like excessive twisting and high maintenance downtime.
Innovation Solution
Eliminate lower belts and associated tension-regulating means, using a second motorized cylinder with increased diameter and interchangeable spacers to adjust the inclination of upper belts, allowing direct fiber pressing against support zones on the cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lower belts are used to press fibers for stretching, then fiber stretching performance is improved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The patent removes the lower belts from the system entirely, extracting the problematic component that caused complexity. Instead of having upper and lower belts, the invention uses only upper belts that press fibers directly against the second motorized cylinder, eliminating the need for lower belts and their associated tension regulation mechanisms.
Solution Approach 2:
The patent merges the function of the lower belts and static track into the second motorized cylinder itself. The cylinder's surface directly serves as the support surface for fiber pressing, combining multiple components (lower belts, static track, support surface) into a single integrated element.
2Area of stationary object
If multiple lower belts are distributed along the roving frame, then fiber stretching coverage is improved, but replacement time and maintenance complexity increase
Solution Approach 1:
By removing the lower belts entirely, the patent eliminates the time-consuming replacement operation. The upper belts remain in place and continue to function without requiring periodic removal and replacement of the lower belt system.
Solution Approach 2:
The patent integrates the support function into the second motorized cylinder, eliminating the need for separate lower belts that would require replacement. The cylinder itself provides the continuous support surface along the entire roving frame length.
3Reliability
If high tension is applied to lower belts to ensure proper fiber pressing, then stretching effectiveness is improved, but risk of excessive twisting and harm to motorized cylinder increases
Solution Approach 1:
By removing the lower belts, the patent eliminates the source of excessive twisting forces. The upper belts press fibers directly against the cylinder without the counterbalancing lower belts that caused harmful twisting moments on the motorized cylinder.
Solution Approach 2:
The patent combines the support function into the cylinder itself, eliminating the belt system that generated harmful twisting forces. The direct contact between upper belts and cylinder surface provides controlled pressing without excessive tension buildup.
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
Simplifies belt tension adjustment and eliminates the need for complex belt replacements, reducing twisting and maintenance time while maintaining effective fiber stretching performance.
Implementation Method 1
The upper belts press the fibers to stretch against the second motorized cylinder
Implementation Method 2
The pressing of the fibers and their dragging in increasing speed in the advancing direction causes the stretching of the fibers
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Fiber stretching device for roving frames, which comprises: at least a first cylinder (1) and a second cylinder (2), both motorized, disposed in parallel in fixed positions; and a plurality of pressing arms (3), disposed in perpendicular to the motorized cylinders (1, 2) and provided with first rollers (31) and second rollers (32), both freely rotating, and upper bags (4) which embrace the corresponding freely rotating second roller (32) and support means (41) of said upper bags. The upper bags (4) press the fibers to stretch (F) directly against support zones (21) of the second motorized cylinder (2), and wherein said device does not have lower bags for the support of the upper bags (4), nor of a static track for the support of said lower bags.