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TT 252 Exam 2 Yarn Preparation
Terms in this set (63)
One objective of the _____________ process is to produce a suitable package for the next process.
One objective of the ___________ process is to inspect the yarn and remove yarn weak spots and defects.
The ___________ process converts small bobbins into larger wound yarn packages.
The three zones of a winder are the
unwinding zone, the tension and clearing zone, and the winding zone
In ____________, over-end withdrawal of yarn from a package adds or removes twists to the yarn
_____________ _________ winders use a reciprocating guide for yarn traverse.
The mode of yarn traverse during ____________ dictates _____________.
winding; the package shape
In _______________ or ______ ___________ winding, packages with flanges are required to prevent slough off.
parallel; near parallel
_________ guides do not require yarn ends for threading.
_________ guides require yarn ends for threading.
____________________ is caused when yarn coils are wound immediately on top of each other.
Problems that ribboning can create are
uneven dye penetration, tension increase during unwinding, and slough off
The purpose of the _________ device in winding is to keep the yarn tension at a __________ __________ level and to break the yarn at _______ __________ so they can be removed while piecing the yarn.
tension; specified constant; weak spots
________ ______________ refers to removing yarn defects (such as thin places, thick places, and clubs) during the __________ process.
Yarn clearing; winding
_________ winding is product by _______ yarn traversing speed.
The warping machine's two main parts are the _____ and the ______________
A _________ ________ is composed of ____________ to hold the supply packages, ____________ devices, ___________, ________________ devices, and __________ ______________.
warper creel; holders; tension; guides; antistatic; stop motions
___________ capacity is the maximum number of supply packages the creel can hold.
A warper creel capacity is affected by _________,_________ ____________, and _____________.
space; tension variation;handling
The indirect warping process is ____________ than the direct process.
____________ warping process is used for mass production or large orders.
_______________ warping process is most suitable for producing short runs and for the development of new styles.
The yarns on a warp beam must be ____________ and wound under ___________ tension.
A warper with a magazine creel is _________ efficient than a warper with a single creed.
In warping, using a moveable headstock is _____________ as efficient as using a __________ ________, but __________________________________________________________.
almost; truck creel; takes up 1/3 less space
Direct warping process is _____________ than indirect warping but requires __________ space.
______________ warping process produces a ________ ____________ beam in one step.
Direct; warp section
______________ warping process produces a _______________ _______ beam in two steps.
Indirect; complete warp
A __________ warp beam contains part of the total number of warp yarns required to weave the fabric.
A __________ warp beam contains the total number of warp yarns required to weave the fabric.
The main objective of the ___________ process is to prepare warp yarns to withstand the stresses of the weaving process.
A secondary objective of the ___________ process is to modify the characteristics (such as weight, stiffness, or hand) of the woven fabric.
Typical ingredients of a size mix are:
water, size agent, lubricant, binder, and preservatives.
The __________ process is performed on single spun warp yarns and untwisted continuous filament yarns.
________, which essentially incorporates the hairiness of a yarn to its main body, is used to minimize _________ __________, warp caused ___________ ___________ in the air jet looms, and _________ _________ and fabric ____________ during weaving.
Sizing; warp breaks; filing stops; fuzz balls; defects
___________ prevents the clinging of warp yarns caused by yarn hairiness during ______________.
Too high _______________-________ on warp yarns will cause excessive warp breaks during weaving due to _____________ ______________.
% size add-on; increased brittleness
The _________________ is used in _____________ to reduce warp yarn coefficient of friction a matter that _________________ the frictional forces on the yarns due to _________________.
lubricant; sizing; decreases; weaving
During weaving, warp yarns experience: (5)
tension, bending, yarn to yarn friction, yarn to metal friction, and impact forces.
______ _____________________ is measured by the distance (expressed as % of yarn radius) that the size material penetrated through the yarn.
_________________ __________________ are Teflon-coated to prevent the sticking of the sizing material.
_______ ____________________ is a measure of how much size material covers the yarn surface.
Weaving efficiency _______________ with increasing ______ ________________.
increases; size encapsulation.
The __________________ process is much faster and less costly than the _________________ process.
In the ______________ process, each warp yarn is threaded through the drop wire, a heddle wire, and a reed dent.
_______________________ is performed if a new style is to be woven.
The _____________________ process is not carried out at the loom.
The ___________________ process is performed at the loom.
__________________ may be done manually if the plant runs few styles.
______________ is done when the style that the machine is running will continue after its current warp beam runs out
________________ machines are expensive, but they are a must when dealing with _____________ style change.
A _______ ________ is the space between two neighboring wires of the reed.
In the ________ process, each end from the new warp beam is tied or pieced to an end of the old warp beam.
What let's the machine know if the yarn breaks because if it doesn't the friction between the package drive and the delivery package will damage the yarns?
What is the term for putting a new supply package into the creel?
What is the term for when two ends of yarn are air entangled together to form new connection where weak spots once were?
The ___________ process is to wind a sheet of required number of yarns and length on a large package called the warp beam.
______________s are needed in parallel winding to support the shoulder package
The _________ is used for winding loom warp beam
What are the 6 sizing machine elements?
4-sized warp drying
5-warp yearn separation section
What is loaded with full wound packages while the other creel is in use?
Single creel info:
efficiency: 25%, wastes time because when supply is out must stop process to restock
What are the 6 winding downtime items?
1-repair broken ends
5-headstock or creel change
6-transfer failure (yarn breaks)
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