Weaving Machine Waste End Stretching Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In airjet weaving machines, long waste ends of weft threads can become damaged or unraveled due to prolonged blowing time, leading to entanglement and re-entry into the fabric, causing weaving defects.
Innovation Solution
A waste end stretching device with a suction nozzle and deflecting element is integrated into the weaving machine to securely hold and manage long waste ends, using a suction force and deflecting mechanism to guide them away from the fabric edge, preventing re-entry and entanglement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If longer waste ends are used to prevent damage from prolonged blowing time, then thread quality is improved, but the waste ends can get entangled and form a tangled mess near the fabric
Solution Approach 1:
The suction nozzle extracts the waste ends from the problematic area near the fabric edge and removes them from the weaving zone. By applying suction force through the nozzle positioned at the fabric edge, the waste ends are pulled away and secured, preventing entanglement while maintaining thread quality.
Solution Approach 2:
The suction nozzle acts as an intermediary device between the waste ends and the fabric edge. It provides a controlled mechanism to manage the waste ends, using suction force to hold them in place and prevent them from causing entanglement or re-entry into the fabric.
2Reliability
If longer waste ends are used to prevent damage from prolonged blowing time, then thread quality is improved, but there is a risk that such long waste ends jump back into a following shed
Solution Approach 1:
The suction nozzle extracts and secures the waste ends at the fabric edge, removing them from the path where they could jump back into the following shed. This extraction prevents the harmful re-entry effect while preserving the beneficial thread quality.
Solution Approach 2:
The suction nozzle applies preliminary anti-action by holding the waste ends in place before they can jump back into the following shed. The suction force creates a counteracting force that prevents the waste ends from re-entering the fabric, eliminating the harmful effect in advance.
3Reliability
If the main nozzle continues to blow against the weft thread during the time interval between two weft insertions, then the weft thread may become damaged or unraveled, but reducing the blowing time may affect the weaving process
Solution Approach 1:
The suction nozzle extracts the waste ends from the main nozzle area after insertion, removing them from the path of the continuing air blow. This allows the main nozzle to maintain its blowing function for productivity while the extracted waste ends are protected from damage.
Solution Approach 2:
The suction nozzle serves as an intermediary that separates the waste ends from the harmful air blow. It provides a protected pathway for the waste ends while allowing the main nozzle to continue its productive blowing function without causing damage to the weft thread.
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
The device effectively secures and removes waste ends without causing further damage, maintaining thread quality and preventing weaving defects by ensuring they are not re-integrated into the fabric.
Implementation Method 1
a suction nozzle (32) adapted for applying a suction force along a longitudinal direction (52) of the suction nozzle (32)
Implementation Method 2
a deflecting element (41) provided between the opening (35) and the edge (3) of the woven fabric (3), which deflecting element (41) at least partly projects beyond the opening (35) for deflecting a portion of the waste ends held in the suction nozzle (32) in their path between the edge (3) of the woven fabric (3) and the opening (35)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Waste end stretching device for a weaving machine with a suction nozzle (32) provided with a lateral suction slit (34) extending along the longitudinal direction (52) of the suction nozzle (32) for sucking waste ends (28) and with an opening (35) provided at a first end (58) of the suction nozzle (32) facing the edge of the woven fabric (3) for conveying waste ends (28) held in the suction nozzle (32) in a direction perpendicular to the longitudinal direction (52) of the suction nozzle (32), and wherein a deflecting element (41) is provided between the opening (35) and the edge of the woven fabric (3), which deflecting element (41) at least partly projects beyond the opening (35) for deflecting waste ends (28) held in the suction nozzle (32) in their path between the edge of the woven fabric (3) and the opening (35). A weaving machine with such a waste end stretching device (30), and the use of such a waste end stretching device (30).