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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.
winding
One objective of the ___________ process is to inspect the yarn and remove yarn weak spots and defects.
winding
The ___________ process converts small bobbins into larger wound yarn packages.
winding
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
winding
_____________ _________ winders use a reciprocating guide for yarn traverse.
Spindle drive
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.
Open
_________ guides require yarn ends for threading.
Closed
____________________ is caused when yarn coils are wound immediately on top of each other.
Ribboning
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.
Cross; high
The warping machine's two main parts are the _____ and the ______________
creel; headstock
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.
Creel
A warper creel capacity is affected by _________,_________ ____________, and _____________.
space; tension variation;handling
The indirect warping process is ____________ than the direct process.
slower
____________ warping process is used for mass production or large orders.
Direct
_______________ warping process is most suitable for producing short runs and for the development of new styles.
Indirect
The yarns on a warp beam must be ____________ and wound under ___________ tension.
parallel; uniform
A warper with a magazine creel is _________ efficient than a warper with a single creed.
more
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.
faster; more
______________ 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.
section
A __________ warp beam contains the total number of warp yarns required to weave the fabric.
complete
The main objective of the ___________ process is to prepare warp yarns to withstand the stresses of the weaving process.
sizing
A secondary objective of the ___________ process is to modify the characteristics (such as weight, stiffness, or hand) of the woven fabric.
sizing
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.
sizing
________, 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 ______________.
Sizing; weaving
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.
Size penetration
_________________ __________________ are Teflon-coated to prevent the sticking of the sizing material.
Cylinder Dryers
_______ ____________________ is a measure of how much size material covers the yarn surface.
Size encapsulation
Weaving efficiency _______________ with increasing ______ ________________.
increases; size encapsulation.
The __________________ process is much faster and less costly than the _________________ process.
tying-in; drawing-in
In the ______________ process, each warp yarn is threaded through the drop wire, a heddle wire, and a reed dent.
drawing-in
_______________________ is performed if a new style is to be woven.
Drawing-in
The _____________________ process is not carried out at the loom.
Drawing-in
The ___________________ process is performed at the loom.
tying-in
__________________ may be done manually if the plant runs few styles.
Drawing-in
______________ is done when the style that the machine is running will continue after its current warp beam runs out
Tying-in
________________ machines are expensive, but they are a must when dealing with _____________ style change.
Drawing-in; frequent
A _______ ________ is the space between two neighboring wires of the reed.
reed dent
In the ________ process, each end from the new warp beam is tied or pieced to an end of the old warp beam.
tying-in
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?
Feeler
What is the term for putting a new supply package into the creel?
Creeling
What is the term for when two ends of yarn are air entangled together to form new connection where weak spots once were?
Splicing
The ___________ process is to wind a sheet of required number of yarns and length on a large package called the warp beam.
warping
______________s are needed in parallel winding to support the shoulder package
Flanges
The _________ is used for winding loom warp beam
Headstock
What are the 6 sizing machine elements?
1-size solution
2-creel
3-size application
4-sized warp drying
5-warp yearn separation section
6-headstock
What is loaded with full wound packages while the other creel is in use?
reserved creel
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
2-beam doffing
3-comb threading
4-creeling
5-headstock or creel change
6-transfer failure (yarn breaks)
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