Staple Yarn Processing Flashcards
what processes are involved in the blowroom?
bale laydown, opening and cleaning, and carding
what is the purpose of bale laydown?
blending
what is the output of bale laydown?
clumps of fibers
what is pneumatics?
components of the blowroom are linked by tubing and the fibers are transported using air steam
what is a bale opener?
pulls tuffs of fibers from the bales
what is a horizontal bale opener?
most common and goes horizontally over top
what is an HVI?
high volume instrumentation, does standard measurements of fiber length, uniformity, stength, finess, maturity, color and trash
what is AFIS?
Advanced fiber infromation system, used to rapdily evalute fiber length, fiber fineness and nep content in loose stock fiber and slivers
where are opposing spikes used?
in the opening process
what is the purpose of beating?
beater and grid bar is for opening and cleaning
if the distance between the grid bar and beater decreases, opening and cleaning _ and Damanging _
increases, increases
if the distance between neighboring grid bars increase, opening and cleaning _ and waste_
increases, increase
if cleaning angle decreases, opening cleaning and damanging _ and holding fibers_
increases, decreases
if mounting angle decreases, opening, cleaning damanging_ and waster_
increases, increases
why is air control critical for grid bars?
not enough-trash will be left
too much-dust will blow back to fiber
whats a fine cleaners?
use air to seperate trash from fiber, used in the end of the cleaning process
what is the process speed?
very fast, 1000kg/hr
horizontal bales do _ processing
batch
inclined bales do _ processing
continous
what are the key factors for bale lay down 3?
consistent product
meet the product requirement
less cost
beating impurities fall through the _
grid bars
_ beater can be used after the _ beater
kirschner, blade
_ beater can be used in the early stages
porcupine
_ beater cannot be used early in the stage process
saw tooth
why do people want to move to better designed under screens? 3
better airflow control
less fiber loss
more gentle beating
what is the purpose of a hopper feed system?
to blend compositions (30% polyester and 70% cotton)
common problems with staple fiber processing? 3
fiber breakage
nep formation
inefficient blending
