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Where is the universal 8-row stopping device used for shuttleless looms

Source：www.cnchangxin.com Release date： 2025-06-30

The universal 8-row warp stopping device for shuttleless looms is a key component for detecting warp breaks and controlling the stopping of the loom. It is mainly used to monitor the warp state in real time, and trigger the loom to stop when abnormalities such as warp breaks or looseness occur, avoiding the production of defective fabrics. The following will explain the functional principles, structural characteristics, application scenarios, and advantages:
1、 Core functions and working principles
1. Principle of meridian interruption detection
The device consists of 8 columns of warp stopping plates (usually metal sheets, each corresponding to a set of warp yarns), conductive electrodes, and control circuits. During normal weaving, the warp yarn supports the warp stop piece and remains suspended, causing the circuit to disconnect; When the warp yarn breaks or loosens, the stop warp piece falls due to its own weight, contacts the electrode to conduct the circuit, and triggers the loom to stop urgently.
The detection accuracy can reach a single warp yarn, with a response time of ≤ 0.1 seconds, ensuring immediate stopping after warp breakage and reducing the generation of waste fabric.
2. Universal design features
Compatible with various weaving machines: It is compatible with rapier looms, jet looms, water jet looms and other types of shuttleless weaving machines, and can be adapted to different models by adjusting the installation bracket and electrical interface.
Multi column synchronous monitoring: 8 rows of warp stopping pieces are arranged in parallel, each row can accommodate 50-100 warp yarns (adjusted according to fabric density), covering the weaving needs of weaving machines with a width of 1.5-3 meters.
2、 Structural composition and key components
1. Mechanical structure
Stop meridian component:
Material: Made of stainless steel or aluminum alloy thin sheet, with a thickness of 0.1-0.3mm, wear-resistant and lightweight (about 5-10g/sheet), avoiding additional tension on the warp yarn.
Shape: Common groove or hole design, with warp yarn passing through the middle groove or hole of the warp stopper to ensure that the stopper can fall freely when it breaks.
Installation framework:
Aluminum alloy or cast iron frame, fixed between the back beam of the loom and the warp frame with bolts, aligned with the position of the warp layer to ensure the vertical suspension of the warp stopping plate.
2. Electrical control system
Electrode and circuit: Conductive copper strips or electrode plates are set on both sides of the frame, forming a closed loop with the warp stopping plate, and connected to the loom PLC control system.
Signal processing: When the warp is broken, the circuit conducts and outputs a high-level signal to the main control system of the loom, triggering parking and displaying the warp position (some models support column number positioning).
3、 Application scenarios and fabric types
1. Suitable for weaving scenarios
Clothing fabric production: used for weaving shirt fabric, denim fabric, suit fabric, etc., with high warp density (such as 100-300 strands/10cm), and the broken warp detection should be correct to the single strand to avoid defects such as holes and loose paths in the fabric.
Industrial textiles: heavy-duty fabrics such as geotextiles, tarpaulins, and fire hose base fabrics, with high warp strength (such as polyester industrial yarn and aramid fiber) and strong impact force when broken. The stopping device needs to respond quickly to prevent yarn entanglement.
Home textiles: curtain fabrics, sandpaper, bedding fabrics, with high requirements for fabric appearance. Testing for breakage can reduce the rate of defective products after dyeing.
4、 Key points for installation and maintenance
Installation and debugging:
The suspension height of the warp stopping plate should match the motion trajectory of the warp frame to avoid collision with the warp wire and steel reed.
Adjust the electrode spacing to 0.5-1mm to ensure reliable conductivity of the circuit when the stop plate falls, while avoiding accidental contact.
Daily maintenance:
Clean the fiber fluff on the surface of the amenorrhea patch every week to prevent adhesion and detection failure; Check the electrode contact resistance every quarter, and the resistance value should be less than 1 Ω.
When weaving high friction coefficient yarns (such as coarse cotton yarn), the warp stop should be replaced every 1000 hours to avoid wear and reduce detection sensitivity.

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