Five-Axial False-Twisting Device Yarn Path Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing five-axial false-twisting devices in draw texturing machines often result in differences in yarn quality due to varying bending angles and yarn paths, leading to issues like color discrepancies during dyeing, as the positional relationship between false-twisting units is not specifically defined, causing inconsistent twisting of yarns.
Innovation Solution
The proposed solution involves aligning five-axial false-twisting devices in a base longitudinal direction with specific positional adjustments and guide configurations to ensure identical bending angles and yarn paths for both yarns, using movable yarn guides to fine-tune the positions and prevent interference, and incorporating weights on unused rotational shafts to stabilize the twisting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If five-axial false-twisting devices are used to process multiple yarns simultaneously, then productivity is improved, but yarn quality consistency deteriorates due to different bending angles and yarn paths
Solution Approach 1:
The patent applies asymmetry by making the yarn guides movable rather than fixed, allowing asymmetric adjustment of yarn paths to achieve symmetric twisting outcomes. The yarn guides can be positioned at different locations to compensate for geometric asymmetries in the five-axial device configuration, ensuring that all yarns experience identical bending angles and path lengths despite the inherent asymmetry of sharing rotational shafts among multiple false-twisting units.
2Device complexity
If fixed yarn guides are used in five-axial false-twisting devices, then device complexity is reduced, but yarn quality consistency deteriorates due to inability to adjust yarn paths
Solution Approach 1:
The patent applies dynamics by transforming fixed yarn guides into movable adjustable guides. The yarn guides are designed to be repositionable along the yarn running direction, allowing dynamic adjustment of yarn paths to achieve identical bending angles and path lengths for all yarns processed by the five-axial false-twisting device, thereby ensuring consistent yarn quality while maintaining operational simplicity.
3Area of stationary object
If five-axial false-twisting devices are tilted to reduce size, then device footprint is reduced, but yarn quality consistency deteriorates due to unequal yarn paths
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the positions of movable yarn guides before the twisting operation begins. The yarn guides are positioned in advance to compensate for the geometric distortions caused by the tilted configuration of the five-axial false-twisting device, ensuring that all yarns follow identical path lengths and bending angles despite the compact tilted arrangement, thereby maintaining yarn quality consistency while achieving reduced device footprint.
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 configuration ensures consistent yarn quality by aligning the yarn paths and bending angles of both yarns, reducing color differences and improving production efficiency, particularly for nylon yarns, while also stabilizing the twisting process and reducing costs by using less expensive weights.
Implementation Method 1
friction discs (circular plate members) which are provided at the respective rotational shafts. As the circular plate members are rotated in predetermined direction, a yarn which runs inside of the triangle while making a contact with the circular plate members is twisted.
Implementation Method 2
at least one of the first yarn guide and the second yarn guide is a movable yarn guide which is able to be adjusted in position relative to the other
Implementation Method 3
incorporating weights on unused rotational shafts to stabilize the twisting process
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An object of the present invention is, in a draw texturing machine in which five-axial false-twisting devices are aligned in a base longitudinal direction, to suppress difference of yarn quality between a first yarn and a second yarn. Each five-axial false-twisting device 15 includes: a first false-twisting unit 51 which includes two first independent rotational shafts 72 and 73 and a common rotational shaft 71 which virtually form apexes of a first triangle 201 when viewed in the axial direction, the first false-twisting unit 51 applying twisting to a yarn Y1; and a second-false twisting unit 52 which includes two second independent rotational shafts 74 and 75 and the common rotational shaft 71 which virtually form apexes of a second triangle 202 when viewed in the axial direction, the second false-twisting unit 52 applying the twisting to a yarn Y2. The first independent rotational shafts 72 and 73 oppose the second independent rotational shafts 74 and 75 over the common rotational shaft 71 in the base longitudinal direction. A straight line 223 passes through a centroid 221 of the first triangle 201 and a centroid 222 of the second triangle 202 when viewed in the axial direction, and the straight line 223 extends along the base longitudinal direction.