Planetary Eyelet Thread Guide for High-Speed Warp Knitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for presenting threads in warp knitting machines are expensive, require significant space, and have limited working speed, making them inefficient for modern textile applications such as sports textiles that require reinforcement or special properties.
Innovation Solution
A thread guide device with an eyelet structure that rotates planetary and a traversing disk, designed to move the thread back and forth over a lifting range, minimizing thread breakage and wear, and allowing for high-speed operation with a compact and inexpensive design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a thread guide is guided on a circular track with a rotating rod, then the thread can be fed to the knitting needles, but the speed is limited due to acceleration and deceleration between reversal points
Solution Approach 1:
Instead of moving the thread guide back and forth on a circular track with reversal points, the invention inverts the approach by using a reciprocating rod that moves linearly between two positions. The thread guide is attached to this rod, eliminating the need for reversal points and allowing higher speeds without acceleration and deceleration limitations.
Solution Approach 2:
The invention replaces the circular track mechanical system with a linear reciprocating rod system. This substitution eliminates the complex reversal mechanism and allows for higher operating speeds while maintaining reliable thread feeding to the knitting needles.
2Ease of operation
If additional storage elements and holding elements are arranged for thread management, then thread positioning is improved, but the device complexity and space requirements increase
Solution Approach 1:
The invention extracts and eliminates the complex storage elements and multiple holding elements from the thread management system. By using a simplified reciprocating rod with a single thread guide, the device achieves adequate thread positioning without the additional components, thereby reducing overall device complexity.
Solution Approach 2:
The reciprocating rod serves multiple functions simultaneously: it guides the thread, positions it accurately, and eliminates the need for separate storage and holding elements. This multi-functionality reduces device complexity while maintaining ease of operation.
3Productivity
If conventional thread feeding devices are used, then thread can be fed to knitting needles, but the device requires significant space and has limited working speed
Solution Approach 1:
The invention inverts the conventional circular track approach by using a linear reciprocating motion system. This inversion allows for higher working speeds up to 1500 meters per minute while requiring significantly less space, as the linear path is more compact than a circular track with reversal points.
4Ease of operation
If the thread guide is moved by an actuating cylinder between reversal points, then the thread can be positioned, but the acceleration and deceleration limit the maximum speed
Solution Approach 1:
The invention extracts and eliminates the reversal points and associated actuating cylinder limitations. By using a reciprocating rod with direct linear motion, the system maintains easy thread guide control without the speed-limiting acceleration and deceleration phases required by circular track systems.
Data Source
Figure 1~4
Figure 2a)~2c)
AI summary
The invention relates to a device for feeding a thread for loop-forming tools, arranged in at least one row, of a textile machine, having a thread guiding device (4) comprising a rotary element (5) and a thread guide (6), wherein the thread guiding device (4) is configured to move a weft thread (2) to and fro in two opposite directions (Hl, HR) in a stroke range (B) in each case in front of the row of tools. The thread guiding device is intended to create a device for feeding a thread over a partial width of a knitted web, wherein the device has a compact structure and allows a high working speed. This is achieved in that the thread guiding device (4) has an eyelet structure (5), which is drivable in a planetary manner about an axis of rotation (R), as rotary element and has a traversing disc (6), configured as the thread guide, which is arranged downstream of the eyelet structure (5) in a thread running direction (FR).