Staple Yarn Processing Flashcards

1
Q

what processes are involved in the blowroom?

A

bale laydown, opening and cleaning, and carding

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2
Q

what is the purpose of bale laydown?

A

blending

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3
Q

what is the output of bale laydown?

A

clumps of fibers

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4
Q

what is pneumatics?

A

components of the blowroom are linked by tubing and the fibers are transported using air steam

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5
Q

what is a bale opener?

A

pulls tuffs of fibers from the bales

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6
Q

what is a horizontal bale opener?

A

most common and goes horizontally over top

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7
Q

what is an HVI?

A

high volume instrumentation, does standard measurements of fiber length, uniformity, stength, finess, maturity, color and trash

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8
Q

what is AFIS?

A

Advanced fiber infromation system, used to rapdily evalute fiber length, fiber fineness and nep content in loose stock fiber and slivers

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9
Q

where are opposing spikes used?

A

in the opening process

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10
Q

what is the purpose of beating?

A

beater and grid bar is for opening and cleaning

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11
Q

if the distance between the grid bar and beater decreases, opening and cleaning _ and Damanging _

A

increases, increases

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12
Q

if the distance between neighboring grid bars increase, opening and cleaning _ and waste_

A

increases, increase

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13
Q

if cleaning angle decreases, opening cleaning and damanging _ and holding fibers_

A

increases, decreases

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14
Q

if mounting angle decreases, opening, cleaning damanging_ and waster_

A

increases, increases

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15
Q

why is air control critical for grid bars?

A

not enough-trash will be left

too much-dust will blow back to fiber

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16
Q

whats a fine cleaners?

A

use air to seperate trash from fiber, used in the end of the cleaning process

17
Q

what is the process speed?

A

very fast, 1000kg/hr

18
Q

horizontal bales do _ processing

A

batch

19
Q

inclined bales do _ processing

A

continous

20
Q

what are the key factors for bale lay down 3?

A

consistent product
meet the product requirement
less cost

21
Q

beating impurities fall through the _

A

grid bars

22
Q

_ beater can be used after the _ beater

A

kirschner, blade

23
Q

_ beater can be used in the early stages

A

porcupine

24
Q

_ beater cannot be used early in the stage process

A

saw tooth

25
Q

why do people want to move to better designed under screens? 3

A

better airflow control
less fiber loss
more gentle beating

26
Q

what is the purpose of a hopper feed system?

A

to blend compositions (30% polyester and 70% cotton)

27
Q

common problems with staple fiber processing? 3

A

fiber breakage
nep formation
inefficient blending