Yarn End Catching Device with Twisting Nozzle
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Solution Overview
Problem
Existing spinning machines face difficulties in quickly and reliably catching yarn ends after a breakage, leading to inefficiencies in the yarn splicing process.
Innovation Solution
A yarn end catching device with a suction pipe and twisting nozzle system that applies whirling airflow to increase yarn strength and prevent breakage, combined with a yarn accumulating device that manages tension and prevents slackening, allowing for stable and efficient yarn splicing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional suction pipe is used to catch yarn ends, then the structure is simple, but the yarn end catching speed is slow and reliability is low
Solution Approach 1:
The patent combines the suction pipe with a twisting device and airflow control system into an integrated yarn end catching device. The twisting device is positioned within or adjacent to the suction pipe, allowing simultaneous suction and twisting operations to be performed on the yarn end, thereby improving catching reliability without requiring separate independent systems
Solution Approach 2:
The patent employs pneumatic principles by using controlled airflow through the suction pipe to capture and transport yarn ends. The airflow system includes air inlets, outlets, and control mechanisms that use pneumatic force to draw in and manipulate the yarn end, replacing or supplementing mechanical catching methods with pneumatic control for improved reliability
2Productivity
If the suction pipe is positioned downstream of the yarn feeding device, then the yarn can be fed continuously, but it is difficult and time-consuming to correctly catch and suck the yarn end
Solution Approach 1:
The patent positions the suction pipe and twisting device to act on the yarn end before it fully enters the downstream feeding region. By applying suction and twisting forces at an optimal upstream position, the system prepares and secures the yarn end for continuous feeding, reducing the time required for successful yarn end capture while maintaining feeding continuity
Solution Approach 2:
The patent implements dynamic control of the suction pipe positioning and airflow intensity to adapt to the moving yarn end. The system can adjust the suction force and pipe position in real-time based on yarn end location and feeding speed, optimizing the catching process to minimize time loss while ensuring continuous productivity
3Strength
If yarn is sucked through a simple suction pipe, then the device is simple, but yarn breakage occurs due to insufficient yarn strength
Solution Approach 1:
The patent merges the suction function with a twisting function in a single integrated device. The twisting mechanism applies rotational force to the yarn end as it is being suctioned, increasing yarn strength through twisting without requiring a separate strengthening device, thus improving yarn strength while limiting overall device complexity
Solution Approach 2:
The patent changes the physical parameters of the yarn by applying twisting force during the suction process. This twisting action alters the yarn's structural parameters, increasing its strength and reducing breakage risk. The controlled application of mechanical stress through twisting transforms the yarn from a weak, loose end to a stronger, more resilient state
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 solution enables faster and more reliable yarn end catching, reducing yarn breakage and improving the efficiency of the yarn splicing process by maintaining stable yarn tension and quality.
Implementation Method 1
an ejector nozzle for injecting compressed air into the suction passage such that a suction airflow is generated
Implementation Method 2
a suction airflow for sucking the yarn end
Implementation Method 3
A yarn end catching device with a suction pipe and twisting nozzle system that applies whirling airflow to increase yarn strength and prevent breakage
Implementation Method 4
a suction pipe which sucks and catches a yarn end of a yarn through a suction opening
Data Source
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AI summary
A yarn end catching device in a spinning machine, with a suction pipe (44) which sucks and catches a yarn end of a yarn (10) through a suction opening (63), the suction pipe (44) of the yarn end catching device comprising: a suction passage (62) for sucking the yarn end; and a twist applying member (67) which applies twists to the yarn sucked in the suction passage (62), wherein an ejector nozzle (66) is provided for injecting compressed air into the suction passage (62) and one suction airflow can be generated through the ejector nozzle (66) and another suction airflow can be generated through the suction pipe (44).