What is a water jet loom? Do you know it?

The water jet loom is a modern shuttleless loom that uses water flow to pull the weft yarn for high-speed weaving. Here is a detailed analysis:

1. Core working principle
Hydraulic weft insertion: A high-pressure water pump (about 4-6MPa) sprays softened water from a 0.1mm nozzle, forming a high-speed water column to drive the weft yarn to fly.
Shuttle mouth coordination: After the warp yarn opening mechanism forms the shuttle mouth, the water flow accurately penetrates, and the weft yarn head end is captured and fixed by the yarn gripper.
Water circulation system: The sprayed water is recovered through a filter screen, and after sedimentation and flocculation, it is pressurized again for use. Cotton wool impurities need to be cleaned regularly.

2. Key structural features
Nozzle component: Ceramic nozzle is wear-resistant and corrosion-resistant, with adjustable angle (± 3 °) to match different yarn tensions.
Length measuring and weft storage device: The electronic weft storage device precisely controls the release length of each weft, and an alarm will be triggered if the error exceeds 2mm.
Dehydration device: The fabric is subjected to vacuum suction pipes and rollers to remove over 90% of its moisture and prevent mold growth.

3. Applicability limitations
Raw material limitations: Only suitable for hydrophobic fibers such as polyester and nylon. Natural fibers such as cotton/linen can cause weft breakage due to swelling when exposed to water.
Fabric range: Proficient in basic weaves such as plain weave/diagonal weave, jacquard varieties require additional color selection mechanisms.
Environmental requirements: The workshop temperature should be below 30 ℃ to prevent water mist condensation, and the relative humidity should be controlled at 65% ± 5%.

4. Maintenance focus
Daily: Check for nozzle blockage (using a 0.2mm steel wire needle), clean the floating yarn in the water tank.
Weekly: Calibrate the deviation of the water pump pressure gauge and test the response speed of the solenoid valve (should be less than 0.1 seconds).
Monthly: Disassemble the yarn guide porcelain eye to inspect for wear marks, and thoroughly clean the biofilm in the water circulation pipeline.

5. Compare with other weaving machines