Type of Weft Insertions in weaving loom

Summary

This video script explores various methods of filling insertion in fabric weaving, highlighting systems such as shuttle, rapier, projectile, air jet, and water jet. It details the history and operation of each system, from the early shuttle loom to the fast-paced air jet and water jet looms. The script also covers the versatility of rapier looms, the high-speed capabilities of air and water jet systems, and introduces the innovative multi-phase insertion technology. With speeds ranging from 150 to 2800 picks per minute, the video gives an in-depth look at the complexities and advancements in fabric production.

Takeaways

• 😀 Shuttle looms use a boat-shaped shuttle to carry yarn across the warp, producing between 150 and 200 picks per minute.
• 😀 Rapier looms are highly versatile, capable of weaving yarns from fine to coarse without requiring readjustments.
• 😀 There are four types of rapier systems: single rigid, double rigid, double flexible, and double telescoping.
• 😀 Double rigid rapier systems use two rapiers to transfer yarn halfway across the warp, improving speed by reducing travel time.
• 😀 Flexible rapier looms, using lightweight, coiled rapiers, can achieve speeds of up to 850 picks per minute.
• 😀 Double telescoping rapiers are similar to double rigid but use sliding or telescoping mechanisms, offering a reduced loom width.
• 😀 Projectile filling insertion uses a small bullet-shaped object to carry yarn across the warp, with speeds accelerated by multiple projectiles in use.
• 😀 Air jet looms use high-pressure air streams to insert yarn, achieving speeds of up to 1,200 picks per minute on single-width fabrics.
• 😀 Water jet looms operate similarly to air jet looms, but use water instead of air for yarn insertion, offering similar speeds and eliminating the need for booster nozzles.
• 😀 Multi-phase insertion is the fastest technology, capable of reaching up to 2,800 picks per minute, but is limited to simple weaves due to its complexity.

Q & A

What is the primary function of the shuttle in shuttle looms?

The shuttle in shuttle looms carries a small quill of yarn and is used to insert the yarn into the fabric by moving across the warp shed. It is the only powered insertion system that carries its own yarn supply.

What is the maximum speed of shuttle looms?

The maximum speed of shuttle looms varies with the width of the fabric but typically produces between 150 and 200 picks per minute.

What makes rapier filling insertion systems versatile?

Rapier filling insertion systems are versatile because they can weave various types of yarn, ranging from very fine to very coarse, without needing to adjust the rapier. Different yarns can be used from pick to pick.

How many types of rapier systems are there and what are they?

There are four types of rapier systems: single rigid, double rigid, double flexible, and double telescoping rapiers.

What is the advantage of double flexible rapiers?

Double flexible rapiers use a flat metal tape or high-tech composite material, which reduces the loom's footprint and allows for higher processing speeds due to their lighter weight and coiled storage.

What is the maximum speed of flexible rapier looms?

Flexible rapier looms can reach speeds of up to 850 picks per minute on single-width fabrics.

How does the projectile filling system work?

In the projectile filling system, a small bullet-shaped object (projectile) is used to carry the filling yarn across the warp shed. The projectile is presented with yarn, fired across the loom, and returned to the picking station through a conveyor chain.

What are the benefits of air jet filling insertion?

Air jet filling insertion is the fastest conventional method of weaving, achieving speeds up to 1,200 picks per minute. It uses a stream of high-pressure air to propel yarn across the warp shed.

What are the challenges of using water jet filling insertion?

Water jet filling insertion cannot be used with all types of fibers; it is limited to hydrophobic fibers. However, it is a fast method with speeds comparable to air jet weaving.

What is the unique feature of multi-phase insertion technology?

Multi-phase insertion technology uses a series of four air jets on a rotary drum to insert picks at speeds of up to 2,800 picks per minute, but it can only handle simple weaves like plain weaves and twills due to its complexity.