Weaving Mechanisms Quiz

<p>It occupies significant space on the loom (B)</p> Signup and view all the answers

<p>Through a fixed picking cam on the bottom shaft (B)</p> Signup and view all the answers

<p>The effectiveness of the shuttle movement (A)</p> Signup and view all the answers

<p>It is essential for the operation of the picking mechanism (C)</p> Signup and view all the answers

<p>To hold the pirn securely (A)</p> Signup and view all the answers

<p>It is only effective at slow speeds (C)</p> Signup and view all the answers

<p>Fur or bristles (A)</p> Signup and view all the answers

<p>It is operated by a picking cam on the bottom shaft (B)</p> Signup and view all the answers

<p>To allow the weft yarn to be removed (D)</p> Signup and view all the answers

<p>Picking stick (A)</p> Signup and view all the answers

<p>Shuttle boxes, picking sticks, and race board (B)</p> Signup and view all the answers

<p>14 - 17 ounces (C)</p> Signup and view all the answers

<p>Under picking (C)</p> Signup and view all the answers

<p>It produces automatic selvedges without external devices. (D)</p> Signup and view all the answers

<p>It requires a larger shed for satisfactory picking. (A)</p> Signup and view all the answers

<p>It protects the weft yarn from dirt and dust. (B)</p> Signup and view all the answers

<p>Higher costs and time for weft preparation. (C)</p> Signup and view all the answers

<p>It can reach levels of 105 decibels. (C)</p> Signup and view all the answers

<p>It consumes about half of the loom's power for picking. (B)</p> Signup and view all the answers

<p>The shuttle flying off the loom can cause injuries. (A)</p> Signup and view all the answers

<p>It leads to changes in the twist as yarn is withdrawn. (D)</p> Signup and view all the answers

<p>Projectiles have less mass. (B)</p> Signup and view all the answers

<p>34 - 40 gms. (C)</p> Signup and view all the answers

<p>Carbon composite (D)</p> Signup and view all the answers

<p>To reduce the speed of the weft yarn. (A)</p> Signup and view all the answers

<p>Two (B)</p> Signup and view all the answers

<p>A type of weft yarn storage. (A)</p> Signup and view all the answers

<p>To transfer the weft yarn to the gripper jaws. (D)</p> Signup and view all the answers

<p>The number of weft colours. (B)</p> Signup and view all the answers

<p>To loosen its hold before inserting the weft yarn (D)</p> Signup and view all the answers

<p>It straightens the residual small piece of weft (B)</p> Signup and view all the answers

<p>Infrared sensor (B)</p> Signup and view all the answers

<p>Right-handed thermal knife (B)</p> Signup and view all the answers

<p>Reed width and loom running speed (A)</p> Signup and view all the answers

<p>Guide angle (B)</p> Signup and view all the answers

<p>Two (B)</p> Signup and view all the answers

<p>Rigid wall and flexible tape (D)</p> Signup and view all the answers

<p>To release water pressure (A)</p> Signup and view all the answers

<p>2,000 metres (B)</p> Signup and view all the answers

<p>Thermal device (A)</p> Signup and view all the answers

<p>Less than 2.0 cm3 (A)</p> Signup and view all the answers

<p>It winds the reserve length of pick (B)</p> Signup and view all the answers

<p>High insertion performance (D)</p> Signup and view all the answers

<p>Weft clamper (A)</p> Signup and view all the answers

<p>They have limited importance in East Asia (A)</p> Signup and view all the answers

A component on a shuttle loom responsible for placing the weft yarn. Located on both sides of the loom, each unit works after every 2 picks, driven by a bottom shaft.

A rectangular wooden shuttle with tapered sides for easy entry, a hollow body holding a pirn (yarn package), a clip for securely holding the pirn and an eye for yarn removal.

The system responsible for moving the shuttle back and forth across the loom.

Two types of methods used for placing yarn in weaving: "over" and "under".

The picking mechanism positioned above the loom.

The picking mechanism positioned below the loom.

A component on the bottom shaft that controls the picking action. Directly driven from a motor.

The shuttle box, located on both sides of the loom, collects the shuttle after the picking motion; the race board is a wooden guide over which the shuttle travels

Shuttle picking automatically creates selvedges without an external device.

Shuttles can carry various weft yarns like plain, fancy, thick, or thin, making them adaptable for different fabrics.

Shuttles protect the weft yarn from dust, dirt, and lint by storing the yarn within a pirn.

Shuttle picking is cost-effective, especially when producing diverse fabrics on the same loom.

Shuttles have a limited capacity for weft yarn, meaning frequent yarn replenishment is needed.

Shuttle picking necessitates a larger shed due to the shuttle's size, putting more strain on the warp yarns.

Shuttle picking generates significant noise, with weaving sheds reaching 105 decibels.

Shuttle picking poses a safety risk due to the high speed at which the shuttles travel, potentially causing injuries or deaths.

A part connected to a shuttle in picking mechanisms, responsible for transmitting motion to the shuttle.

A flexible belt made of leather or polymer that connects the picking stick to the picker.

The part directly attached to the shuttle, moves the shuttle via the picking strap.

A component in over picking that restricts the picker to a straight path, reducing energy efficiency.

Over picking is outdated because it's only suitable for slow speeds, takes up space, requires oiling that stains fabric, and is not compatible with automatic shuttle looms.

The speed at which a projectile travels in a projectile loom, typically much faster than a shuttle loom due to the projectile's lighter weight.

The weight of a projectile in a projectile loom is significantly less than a shuttle, typically ranging from 34 to 40 grams.

Projectiles can be made of steel or carbon composite materials. Steel projectiles are classified as D1, D12, and D2, while carbon composite projectiles are classified as K3.

A type of projectile made from carbon composite material, primarily used for weaving delicate fabrics.

The container holding the weft yarn in a projectile loom, typically a cone or cheese form, with varying weights depending on the yarn count.

A component in a projectile loom that draws weft yarn from the package and winds it onto a drum, storing a length of yarn sufficient for 2-3 picks.

A component that slows down the weft yarn speed, acting like a brake, ensuring controlled yarn delivery to the projectile.

A component that provides the required tension to the weft yarn, ensuring consistent yarn delivery and weave quality.

A weaving machine that uses a high-pressure water jet to project weft yarn across the warp, creating fabric. It is known for its high speed, low energy consumption, and ability to weave a variety of fabrics.

A water jet, propelled with force, carries a weft yarn across the shed (the gap between warp yarns). The force of the water is sufficient to move the yarn despite a large shed width.

Major components include the main nozzle, accumulator, tension regulator, weft clamp, leno mechanism, front roller, cone, pump, container, cam, selvedge cones, leno heald eye, clamping device, thermal device, heald frames, and cloth roll.

A device in a water-jet loom that stores and controls the length of weft yarn being fed to the weaving process.

A component in a water-jet loom that maintains consistent tension on the weft yarn, ensuring even weaving.

A clamp that holds the tip of the weft yarn before it is projected by the water jet.

A mechanism in a water-jet loom that creates selvedge (the edge of the fabric) using leno yarns, giving it a specific structure and strength.

A device that uses heat to cut the weft yarn after the weaving process, creating a clean finish.

A weaving method that uses a high-pressure water jet to propel the weft yarn through the shed (openings between warp yarns).

The weft clamp loosens its grip on the weft yarn to allow the water jet to pick it up and insert it into the shed.

Thermal knives are used in water-jet weaving to cut the weft yarn, ensuring a clean finish.

The initial phase of water-jet picking where the water jet straightens the residual weft before launching it through the shed.

The path the weft yarn takes as it travels through the shed during water jet picking.

A weaving method where rapiers (thin, flexible needles) are used to carry the weft yarn through the shed.

Rapiers used in rapier picking are attached to a rigid wall and a flexible tape for movement.